Changeset 069015f2 in mainline

Timestamp:

2010-10-30T19:40:49Z (13 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

5c088975

Parents:

f2d2c604 (diff), fd8e8e1 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge from lp:~jakub/helenos/net.

Location:

uspace

Files:

• lib/net/il/ip_remote.c (modified) (9 diffs)
• srv/net/il/arp/arp.c (modified) (28 diffs)
• srv/net/il/arp/arp.h (modified) (3 diffs)
• srv/net/il/arp/arp_header.h (modified) (1 diff)
• srv/net/il/arp/arp_module.c (modified) (3 diffs)
• srv/net/il/arp/arp_module.h (modified) (1 diff)
• srv/net/il/arp/arp_oc.h (modified) (1 diff)
• srv/net/il/ip/ip.c (modified) (17 diffs)
• srv/net/il/ip/ip.h (modified) (3 diffs)
• srv/net/il/ip/ip_local.h (deleted)
• srv/net/il/ip/ip_module.c (modified) (3 diffs)
• srv/net/il/ip/ip_module.h (modified) (1 diff)

uspace/lib/net/il/ip_remote.c

@@ -57 +57 @@
  * The target network is routed using this device.
  *
- * @param[in] ip_phone  The IP module phone used for (semi)remote calls.
- * @param[in] device_id The device identifier.
- * @param[in] address   The target network address.
- * @param[in] netmask   The target network mask.
- * @param[in] gateway   The target network gateway. Not used if zero.
- *
+ * @param[in] ip_phone  The IP module phone used for (semi)remote calls.
+ * @param[in] device_id The device identifier.
+ * @param[in] address   The target network address.
+ * @param[in] netmask   The target network mask.
+ * @param[in] gateway   The target network gateway. Not used if zero.
  */
 int ip_add_route_req_remote(int ip_phone, device_id_t device_id,
@@ -106 +105 @@
  * If the device uses ARP registers also the new ARP device.
  *
- * @param[in] ip_phone  The IP module phone used for (semi)remote calls.
- * @param[in] device_id The new device identifier.
- * @param[in] netif     The underlying device network interface layer service.
- *
- * @return EOK on success.
- * @return ENOMEM if there is not enough memory left.
- * @return EINVAL if the device configuration is invalid.
- * @return ENOTSUP if the device uses IPv6.
- * @return ENOTSUP if the device uses DHCP.
- * @return Other error codes as defined for the net_get_device_conf_req()
- *         function.
- * @return Other error codes as defined for the arp_device_req() function.
- *
+ * @param[in] ip_phone  The IP module phone used for (semi)remote calls.
+ * @param[in] device_id The new device identifier.
+ * @param[in] netif     The underlying device network interface layer service.
+ * @return              EOK on success.
+ * @return              ENOMEM if there is not enough memory left.
+ * @return              EINVAL if the device configuration is invalid.
+ * @return              ENOTSUP if the device uses IPv6.
+ * @return              ENOTSUP if the device uses DHCP.
+ * @return              Other error codes as defined for the
+ *                      net_get_device_conf_req() function.
+ * @return              Other error codes as defined for the arp_device_req()
+ *                      function.
  */
 int ip_device_req_remote(int ip_phone, device_id_t device_id,
@@ -130 +128 @@
  * destination address.
  *
- * @param[in]  ip_phone    The IP module phone used for (semi)remote calls.
- * @param[in]  protocol    The transport protocol.
- * @param[in]  destination The destination address.
- * @param[in]  addrlen     The destination address length.
- * @param[out] device_id   The device identifier.
- * @param[out] header      The constructed IP pseudo header.
- * @param[out] headerlen   The IP pseudo header length.
+ * @param[in] ip_phone  The IP module phone used for (semi)remote calls.
+ * @param[in] protocol  The transport protocol.
+ * @param[in] destination The destination address.
+ * @param[in] addrlen   The destination address length.
+ * @param[out] device_id The device identifier.
+ * @param[out] header   The constructed IP pseudo header.
+ * @param[out] headerlen The IP pseudo header length.
  *
  */
@@ -143 +141 @@
     device_id_t *device_id, void **header, size_t *headerlen)
 {
-        if ((!destination) || (addrlen == 0))
+        if (!destination || (addrlen == 0))
                 return EINVAL;
         
-        if ((!device_id) || (!header) || (!headerlen))
+        if (!device_id || !header || !headerlen)
                 return EBADMEM;
         
@@ -169 +167 @@
         async_wait_for(message_id, &result);
         
-        if ((result != EOK) && (*header))
+        if ((result != EOK) && *header)
                 free(*header);
         else
@@ -179 +177 @@
 /** Return the device packet dimension for sending.
  *
- * @param[in]  ip_phone         The IP module phone used for (semi)remote calls.
- * @param[in]  device_id        The device identifier.
+ * @param[in] ip_phone  The IP module phone used for (semi)remote calls.
+ * @param[in] device_id The device identifier.
  * @param[out] packet_dimension The packet dimension.
- *
- * @return EOK on success.
- * @return ENOENT if there is no such device.
- * @return Other error codes as defined for the
- *         generic_packet_size_req_remote() function.
- *
+ * @return              EOK on success.
+ * @return              ENOENT if there is no such device.
+ * @return              Other error codes as defined for the
+ *                      generic_packet_size_req_remote() function.
  */
 int ip_packet_size_req_remote(int ip_phone, device_id_t device_id,
@@ -198 +194 @@
 /** Notify the IP module about the received error notification packet.
  *
- * @param[in] ip_phone  The IP module phone used for (semi)remote calls.
- * @param[in] device_id The device identifier.
- * @param[in] packet    The received packet or the received packet queue.
- * @param[in] target    The target internetwork module service to be
- *                      delivered to.
- * @param[in] error     The packet error reporting service. Prefixes the
- *                      received packet.
- *
- * @return EOK on success.
- *
+ * @param[in] ip_phone  The IP module phone used for (semi)remote calls.
+ * @param[in] device_id The device identifier.
+ * @param[in] packet    The received packet or the received packet queue.
+ * @param[in] target    The target internetwork module service to be
+ *                      delivered to.
+ * @param[in] error     The packet error reporting service. Prefixes the
+ *                      received packet.
+ * @return              EOK on success.
  */
 int ip_received_error_msg_remote(int ip_phone, device_id_t device_id,
@@ -220 +214 @@
  * The packets may get fragmented if needed.
  *
- * @param[in] ip_phone  The IP module phone used for (semi)remote calls.
- * @param[in] device_id The device identifier.
- * @param[in] packet    The packet fragments as a packet queue. All the
- *                      packets have to have the same destination address.
- * @param[in] sender    The sending module service.
- * @param[in] error     The packet error reporting service. Prefixes the
- *                      received packet.
- *
- * @return EOK on success.
- * @return Other error codes as defined for the generic_send_msg() function.
- *
+ * @param[in] ip_phone  The IP module phone used for (semi)remote calls.
+ * @param[in] device_id The device identifier.
+ * @param[in] packet    The packet fragments as a packet queue. All the
+ *                      packets have to have the same destination address.
+ * @param[in] sender    The sending module service.
+ * @param[in] error     The packet error reporting service. Prefixes the
+ *                      received packet.
+ * @return              EOK on success.
+ * @return              Other error codes as defined for the generic_send_msg()
+ *                      function.
  */
 int ip_send_msg_remote(int ip_phone, device_id_t device_id, packet_t packet,
@@ -243 +236 @@
  * This gateway is used if no other route is found.
  *
- * @param[in] ip_phone  The IP module phone used for (semi)remote calls.
- * @param[in] device_id The device identifier.
- * @param[in] gateway   The default gateway.
- *
+ * @param[in] ip_phone  The IP module phone used for (semi)remote calls.
+ * @param[in] device_id The device identifier.
+ * @param[in] gateway   The default gateway.
  */
 int ip_set_gateway_req_remote(int ip_phone, device_id_t device_id,

uspace/srv/net/il/arp/arp.c

@@ -28 +28 @@
 
 /** @addtogroup arp
- *  @{
+ * @{
  */
 
 /** @file
- *  ARP module implementation.
- *  @see arp.h
- */
+ * ARP module implementation.
+ * @see arp.h
+ */
+
+#include "arp.h"
+#include "arp_header.h"
+#include "arp_oc.h"
+#include "arp_module.h"
 
 #include <async.h>
@@ -43 +48 @@
 #include <str.h>
 #include <task.h>
+#include <adt/measured_strings.h>
 #include <ipc/ipc.h>
 #include <ipc/services.h>
@@ -53 +59 @@
 #include <net/modules.h>
 #include <net/device.h>
-#include <arp_interface.h>
+#include <net/packet.h>
+
 #include <nil_interface.h>
 #include <protocol_map.h>
-#include <adt/measured_strings.h>
-#include <net/packet.h>
 #include <packet_client.h>
 #include <packet_remote.h>
@@ -63 +68 @@
 #include <il_local.h>
 
-#include "arp.h"
-#include "arp_header.h"
-#include "arp_oc.h"
-#include "arp_module.h"
-
-
-/** ARP module name.
- */
+
+/** ARP module name. */
 #define NAME  "arp"
 
-/** ARP global data.
- */
-arp_globals_t   arp_globals;
+/** ARP global data. */
+arp_globals_t arp_globals;
+
+DEVICE_MAP_IMPLEMENT(arp_cache, arp_device_t);
+INT_MAP_IMPLEMENT(arp_protos, arp_proto_t);
+GENERIC_CHAR_MAP_IMPLEMENT(arp_addr, measured_string_t);
 
 /** Clears the device specific data.
- *  @param[in] device The device specific data.
- */
-void arp_clear_device(arp_device_ref device);
-
-/** Creates new protocol specific data.
- *  Allocates and returns the needed memory block as the proto parameter.
- *  @param[out] proto The allocated protocol specific data.
- *  @param[in] service The protocol module service.
- *  @param[in] address The actual protocol device address.
- *  @returns EOK on success.
- *  @returns ENOMEM if there is not enough memory left.
- */
-int arp_proto_create(arp_proto_ref * proto, services_t service, measured_string_ref address);
-
-/** @name Message processing functions
- */
-/*@{*/
-
-/** Registers the device.
- *  Creates new device entry in the cache or updates the protocol address if the device with the device identifier and the driver service exists.
- *  @param[in] device_id The device identifier.
- *  @param[in] service The device driver service.
- *  @param[in] protocol The protocol service.
- *  @param[in] address The actual device protocol address.
- *  @returns EOK on success.
- *  @returns EEXIST if another device with the same device identifier and different driver service exists.
- *  @returns ENOMEM if there is not enough memory left.
- *  @returns Other error codes as defined for the measured_strings_return() function.
- */
-int arp_device_message(device_id_t device_id, services_t service, services_t protocol, measured_string_ref address);
-
-/** Updates the device content length according to the new MTU value.
- *  @param[in] device_id The device identifier.
- *  @param[in] mtu The new mtu value.
- *  @returns ENOENT if device is not found.
- *  @returns EOK on success.
- */
-int arp_mtu_changed_message(device_id_t device_id, size_t mtu);
-
-/** Processes the received ARP packet.
- *  Updates the source hardware address if the source entry exists or the packet is targeted to my protocol address.
- *  Responses to the ARP request if the packet is the ARP request and is targeted to my address.
- *  @param[in] device_id The source device identifier.
- *  @param[in,out] packet The received packet.
- *  @returns EOK on success and the packet is no longer needed.
- *  @returns 1 on success and the packet has been reused.
- *  @returns EINVAL if the packet is too small to carry an ARP packet.
- *  @returns EINVAL if the received address lengths differs from the registered values.
- *  @returns ENOENT if the device is not found in the cache.
- *  @returns ENOENT if the protocol for the device is not found in the cache.
- *  @returns ENOMEM if there is not enough memory left.
- */
-int arp_receive_message(device_id_t device_id, packet_t packet);
-
-/** Returns the hardware address for the given protocol address.
- *  Sends the ARP request packet if the hardware address is not found in the cache.
- *  @param[in] device_id The device identifier.
- *  @param[in] protocol The protocol service.
- *  @param[in] target The target protocol address.
- *  @returns The hardware address of the target.
- *  @returns NULL if the target parameter is NULL.
- *  @returns NULL if the device is not found.
- *  @returns NULL if the device packet is too small to send a&nbsp;request.
- *  @returns NULL if the hardware address is not found in the cache.
- */
-measured_string_ref arp_translate_message(device_id_t device_id, services_t protocol, measured_string_ref target);
-
-/*@}*/
-
-DEVICE_MAP_IMPLEMENT(arp_cache, arp_device_t)
-
-INT_MAP_IMPLEMENT(arp_protos, arp_proto_t)
-
-GENERIC_CHAR_MAP_IMPLEMENT(arp_addr, measured_string_t)
-
-int arp_clean_cache_req(int arp_phone){
+ *
+ * @param[in] device    The device specific data.
+ */
+static void arp_clear_device(arp_device_ref device)
+{
+        int count;
+        arp_proto_ref proto;
+
+        for (count = arp_protos_count(&device->protos) - 1; count >= 0;
+            count--) {
+                proto = arp_protos_get_index(&device->protos, count);
+                if (proto) {
+                        if (proto->addr)
+                                free(proto->addr);
+                        if (proto->addr_data)
+                                free(proto->addr_data);
+                        arp_addr_destroy(&proto->addresses);
+                }
+        }
+        arp_protos_clear(&device->protos);
+}
+
+static int arp_clean_cache_req(int arp_phone)
+{
         int count;
         arp_device_ref device;
 
         fibril_rwlock_write_lock(&arp_globals.lock);
-        for(count = arp_cache_count(&arp_globals.cache) - 1; count >= 0; -- count){
+        for (count = arp_cache_count(&arp_globals.cache) - 1; count >= 0;
+            count--) {
                 device = arp_cache_get_index(&arp_globals.cache, count);
-                if(device){
+                if (device) {
                         arp_clear_device(device);
-                        if(device->addr_data){
+                        if (device->addr_data)
                                 free(device->addr_data);
-                        }
-                        if(device->broadcast_data){
+                        if (device->broadcast_data)
                                 free(device->broadcast_data);
-                        }
                 }
         }
@@ -176 +125 @@
 }
 
-int arp_clear_address_req(int arp_phone, device_id_t device_id, services_t protocol, measured_string_ref address){
+static int
+arp_clear_address_req(int arp_phone, device_id_t device_id, services_t protocol,
+    measured_string_ref address)
+{
         arp_device_ref device;
         arp_proto_ref proto;
@@ -182 +134 @@
         fibril_rwlock_write_lock(&arp_globals.lock);
         device = arp_cache_find(&arp_globals.cache, device_id);
-        if(! device){
+        if (!device) {
                 fibril_rwlock_write_unlock(&arp_globals.lock);
                 return ENOENT;
         }
         proto = arp_protos_find(&device->protos, protocol);
-        if(! proto){
+        if (!proto) {
                 fibril_rwlock_write_unlock(&arp_globals.lock);
                 return ENOENT;
@@ -196 +148 @@
 }
 
-void arp_clear_device(arp_device_ref device){
-        int count;
-        arp_proto_ref proto;
-
-        for(count = arp_protos_count(&device->protos) - 1; count >= 0; -- count){
-                proto = arp_protos_get_index(&device->protos, count);
-                if(proto){
-                        if(proto->addr){
-                                free(proto->addr);
-                        }
-                        if(proto->addr_data){
-                                free(proto->addr_data);
-                        }
-                        arp_addr_destroy(&proto->addresses);
-                }
-        }
-        arp_protos_clear(&device->protos);
-}
-
-int arp_clear_device_req(int arp_phone, device_id_t device_id){
+
+static int arp_clear_device_req(int arp_phone, device_id_t device_id)
+{
         arp_device_ref device;
 
         fibril_rwlock_write_lock(&arp_globals.lock);
         device = arp_cache_find(&arp_globals.cache, device_id);
-        if(! device){
+        if (!device) {
                 fibril_rwlock_write_unlock(&arp_globals.lock);
                 return ENOENT;
@@ -230 +165 @@
 }
 
-int arp_device_message(device_id_t device_id, services_t service, services_t protocol, measured_string_ref address){
+/** Creates new protocol specific data.
+ *
+ * Allocates and returns the needed memory block as the proto parameter.
+ *
+ * @param[out] proto    The allocated protocol specific data.
+ * @param[in] service   The protocol module service.
+ * @param[in] address   The actual protocol device address.
+ * @returns             EOK on success.
+ * @returns             ENOMEM if there is not enough memory left.
+ */
+static int
+arp_proto_create(arp_proto_ref *proto, services_t service,
+    measured_string_ref address)
+{
+        ERROR_DECLARE;
+
+        *proto = (arp_proto_ref) malloc(sizeof(arp_proto_t));
+        if (!*proto)
+                return ENOMEM;
+        (*proto)->service = service;
+        (*proto)->addr = address;
+        (*proto)->addr_data = address->value;
+        if (ERROR_OCCURRED(arp_addr_initialize(&(*proto)->addresses))) {
+                free(*proto);
+                return ERROR_CODE;
+        }
+        return EOK;
+}
+
+/** Registers the device.
+ *
+ * Creates new device entry in the cache or updates the protocol address if the
+ * device with the device identifier and the driver service exists.
+ *
+ * @param[in] device_id The device identifier.
+ * @param[in] service   The device driver service.
+ * @param[in] protocol  The protocol service.
+ * @param[in] address   The actual device protocol address.
+ * @returns             EOK on success.
+ * @returns             EEXIST if another device with the same device identifier
+ *                      and different driver service exists.
+ * @returns             ENOMEM if there is not enough memory left.
+ * @returns             Other error codes as defined for the
+ *                      measured_strings_return() function.
+ */
+static int
+arp_device_message(device_id_t device_id, services_t service,
+    services_t protocol, measured_string_ref address)
+{
         ERROR_DECLARE;
 
@@ -241 +224 @@
         // an existing device?
         device = arp_cache_find(&arp_globals.cache, device_id);
-        if(device){
-                if(device->service != service){
+        if (device) {
+                if (device->service != service) {
                         printf("Device %d already exists\n", device->device_id);
                         fibril_rwlock_write_unlock(&arp_globals.lock);
@@ -248 +231 @@
                 }
                 proto = arp_protos_find(&device->protos, protocol);
-                if(proto){
+                if (proto) {
                         free(proto->addr);
                         free(proto->addr_data);
                         proto->addr = address;
                         proto->addr_data = address->value;
-                }else{
-                        if(ERROR_OCCURRED(arp_proto_create(&proto, protocol, address))){
+                } else {
+                        if (ERROR_OCCURRED(arp_proto_create(&proto, protocol,
+                            address))) {
                                 fibril_rwlock_write_unlock(&arp_globals.lock);
                                 return ERROR_CODE;
                         }
-                        index = arp_protos_add(&device->protos, proto->service, proto);
-                        if(index < 0){
+                        index = arp_protos_add(&device->protos, proto->service,
+                            proto);
+                        if (index < 0) {
                                 fibril_rwlock_write_unlock(&arp_globals.lock);
                                 free(proto);
                                 return index;
                         }
-                        printf("New protocol added:\n\tdevice id\t= %d\n\tproto\t= %d", device_id, protocol);
-                }
-        }else{
+                        printf("New protocol added:\n\tdevice id\t= "
+                            "%d\n\tproto\t= %d", device_id, protocol);
+                }
+        } else {
                 hardware = hardware_map(service);
-                if(! hardware){
+                if (!hardware)
                         return ENOENT;
-                }
+                
                 // create a new device
                 device = (arp_device_ref) malloc(sizeof(arp_device_t));
-                if(! device){
+                if (!device) {
                         fibril_rwlock_write_unlock(&arp_globals.lock);
                         return ENOMEM;
@@ -279 +265 @@
                 device->hardware = hardware;
                 device->device_id = device_id;
-                if(ERROR_OCCURRED(arp_protos_initialize(&device->protos))
-                        || ERROR_OCCURRED(arp_proto_create(&proto, protocol, address))){
+                if (ERROR_OCCURRED(arp_protos_initialize(&device->protos)) ||
+                    ERROR_OCCURRED(arp_proto_create(&proto, protocol,
+                    address))) {
                         fibril_rwlock_write_unlock(&arp_globals.lock);
                         free(device);
@@ -286 +273 @@
                 }
                 index = arp_protos_add(&device->protos, proto->service, proto);
-                if(index < 0){
+                if (index < 0) {
                         fibril_rwlock_write_unlock(&arp_globals.lock);
                         arp_protos_destroy(&device->protos);
@@ -293 +280 @@
                 }
                 device->service = service;
+                
                 // bind the new one
-                device->phone = nil_bind_service(device->service, (ipcarg_t) device->device_id, SERVICE_ARP, arp_globals.client_connection);
-                if(device->phone < 0){
+                device->phone = nil_bind_service(device->service,
+                    (ipcarg_t) device->device_id, SERVICE_ARP,
+                    arp_globals.client_connection);
+                if (device->phone < 0) {
                         fibril_rwlock_write_unlock(&arp_globals.lock);
                         arp_protos_destroy(&device->protos);
@@ -301 +291 @@
                         return EREFUSED;
                 }
+                
                 // get packet dimensions
-                if(ERROR_OCCURRED(nil_packet_size_req(device->phone, device_id, &device->packet_dimension))){
+                if (ERROR_OCCURRED(nil_packet_size_req(device->phone, device_id,
+                    &device->packet_dimension))) {
                         fibril_rwlock_write_unlock(&arp_globals.lock);
                         arp_protos_destroy(&device->protos);
@@ -308 +300 @@
                         return ERROR_CODE;
                 }
+                
                 // get hardware address
-                if(ERROR_OCCURRED(nil_get_addr_req(device->phone, device_id, &device->addr, &device->addr_data))){
+                if (ERROR_OCCURRED(nil_get_addr_req(device->phone, device_id,
+                    &device->addr, &device->addr_data))) {
                         fibril_rwlock_write_unlock(&arp_globals.lock);
                         arp_protos_destroy(&device->protos);
@@ -315 +309 @@
                         return ERROR_CODE;
                 }
+                
                 // get broadcast address
-                if(ERROR_OCCURRED(nil_get_broadcast_addr_req(device->phone, device_id, &device->broadcast_addr, &device->broadcast_data))){
+                if (ERROR_OCCURRED(nil_get_broadcast_addr_req(device->phone,
+                    device_id, &device->broadcast_addr,
+                    &device->broadcast_data))) {
                         fibril_rwlock_write_unlock(&arp_globals.lock);
                         free(device->addr);
@@ -324 +321 @@
                         return ERROR_CODE;
                 }
-                if(ERROR_OCCURRED(arp_cache_add(&arp_globals.cache, device->device_id, device))){
+                
+                if (ERROR_OCCURRED(arp_cache_add(&arp_globals.cache,
+                    device->device_id, device))) {
                         fibril_rwlock_write_unlock(&arp_globals.lock);
                         free(device->addr);
@@ -334 +333 @@
                         return ERROR_CODE;
                 }
-                printf("%s: Device registered (id: %d, type: 0x%x, service: %d, proto: %d)\n",
-                    NAME, device->device_id, device->hardware, device->service, protocol);
+                printf("%s: Device registered (id: %d, type: 0x%x, service: %d,"
+                    " proto: %d)\n", NAME, device->device_id, device->hardware,
+                    device->service, protocol);
         }
         fibril_rwlock_write_unlock(&arp_globals.lock);
-        return EOK;
-}
-
-int arp_device_req(int arp_phone, device_id_t device_id, services_t protocol, services_t netif, measured_string_ref address){
-        ERROR_DECLARE;
-
-        measured_string_ref tmp;
-
-        // copy the given address for exclusive use
-        tmp = measured_string_copy(address);
-        if(ERROR_OCCURRED(arp_device_message(device_id, netif, protocol, tmp))){
-                free(tmp->value);
-                free(tmp);
-        }
-        return ERROR_CODE;
-}
-
-int arp_initialize(async_client_conn_t client_connection){
+        
+        return EOK;
+}
+
+/** Initializes the ARP module.
+ *
+ *  @param[in] client_connection The client connection processing function.
+ *                      The module skeleton propagates its own one.
+ *  @returns            EOK on success.
+ *  @returns            ENOMEM if there is not enough memory left.
+ */
+int arp_initialize(async_client_conn_t client_connection)
+{
         ERROR_DECLARE;
 
@@ -366 +361 @@
 }
 
-int arp_message_standalone(ipc_callid_t callid, ipc_call_t *call,
-    ipc_call_t *answer, int *answer_count)
-{
-        ERROR_DECLARE;
-        
-        measured_string_ref address;
-        measured_string_ref translation;
-        char * data;
-        packet_t packet;
-        packet_t next;
-        
-        *answer_count = 0;
-        switch (IPC_GET_METHOD(*call)) {
-                case IPC_M_PHONE_HUNGUP:
-                        return EOK;
-                case NET_ARP_DEVICE:
-                        ERROR_PROPAGATE(measured_strings_receive(&address, &data, 1));
-                        if(ERROR_OCCURRED(arp_device_message(IPC_GET_DEVICE(call), IPC_GET_SERVICE(call), ARP_GET_NETIF(call), address))){
-                                free(address);
-                                free(data);
-                        }
-                        return ERROR_CODE;
-                case NET_ARP_TRANSLATE:
-                        ERROR_PROPAGATE(measured_strings_receive(&address, &data, 1));
-                        fibril_rwlock_read_lock(&arp_globals.lock);
-                        translation = arp_translate_message(IPC_GET_DEVICE(call), IPC_GET_SERVICE(call), address);
-                        free(address);
-                        free(data);
-                        if(! translation){
-                                fibril_rwlock_read_unlock(&arp_globals.lock);
-                                return ENOENT;
-                        }
-                        ERROR_CODE = measured_strings_reply(translation, 1);
-                        fibril_rwlock_read_unlock(&arp_globals.lock);
-                        return ERROR_CODE;
-                case NET_ARP_CLEAR_DEVICE:
-                        return arp_clear_device_req(0, IPC_GET_DEVICE(call));
-                case NET_ARP_CLEAR_ADDRESS:
-                        ERROR_PROPAGATE(measured_strings_receive(&address, &data, 1));
-                        arp_clear_address_req(0, IPC_GET_DEVICE(call), IPC_GET_SERVICE(call), address);
-                        free(address);
-                        free(data);
-                        return EOK;
-                case NET_ARP_CLEAN_CACHE:
-                        return arp_clean_cache_req(0);
-                case NET_IL_DEVICE_STATE:
-                        // do nothing - keep the cache
-                        return EOK;
-                case NET_IL_RECEIVED:
-                        if(! ERROR_OCCURRED(packet_translate_remote(arp_globals.net_phone, &packet, IPC_GET_PACKET(call)))){
-                                fibril_rwlock_read_lock(&arp_globals.lock);
-                                do{
-                                        next = pq_detach(packet);
-                                        ERROR_CODE = arp_receive_message(IPC_GET_DEVICE(call), packet);
-                                        if(ERROR_CODE != 1){
-                                                pq_release_remote(arp_globals.net_phone, packet_get_id(packet));
-                                        }
-                                        packet = next;
-                                }while(packet);
-                                fibril_rwlock_read_unlock(&arp_globals.lock);
-                        }
-                        return ERROR_CODE;
-                case NET_IL_MTU_CHANGED:
-                        return arp_mtu_changed_message(IPC_GET_DEVICE(call), IPC_GET_MTU(call));
-        }
-        
-        return ENOTSUP;
-}
-
-int arp_mtu_changed_message(device_id_t device_id, size_t mtu){
+/** Updates the device content length according to the new MTU value.
+ *
+ * @param[in] device_id The device identifier.
+ * @param[in] mtu       The new mtu value.
+ * @returns             ENOENT if device is not found.
+ * @returns             EOK on success.
+ */
+static int arp_mtu_changed_message(device_id_t device_id, size_t mtu)
+{
         arp_device_ref device;
 
         fibril_rwlock_write_lock(&arp_globals.lock);
         device = arp_cache_find(&arp_globals.cache, device_id);
-        if(! device){
+        if (!device) {
                 fibril_rwlock_write_unlock(&arp_globals.lock);
                 return ENOENT;
         }
         device->packet_dimension.content = mtu;
+        fibril_rwlock_write_unlock(&arp_globals.lock);
         printf("arp - device %d changed mtu to %d\n\n", device_id, mtu);
-        fibril_rwlock_write_unlock(&arp_globals.lock);
-        return EOK;
-}
-
-int arp_proto_create(arp_proto_ref * proto, services_t service, measured_string_ref address){
-        ERROR_DECLARE;
-
-        *proto = (arp_proto_ref) malloc(sizeof(arp_proto_t));
-        if(!(*proto)){
-                return ENOMEM;
-        }
-        (** proto).service = service;
-        (** proto).addr = address;
-        (** proto).addr_data = address->value;
-        if(ERROR_OCCURRED(arp_addr_initialize(&(** proto).addresses))){
-                free(*proto);
-                return ERROR_CODE;
-        }
-        return EOK;
-}
-
-int arp_receive_message(device_id_t device_id, packet_t packet){
+        return EOK;
+}
+
+/** Processes the received ARP packet.
+ *
+ * Updates the source hardware address if the source entry exists or the packet
+ * is targeted to my protocol address.
+ * Responses to the ARP request if the packet is the ARP request and is
+ * targeted to my address.
+ *
+ * @param[in] device_id The source device identifier.
+ * @param[in,out] packet The received packet.
+ * @returns             EOK on success and the packet is no longer needed.
+ * @returns             One on success and the packet has been reused.
+ * @returns             EINVAL if the packet is too small to carry an ARP
+ *                      packet.
+ * @returns             EINVAL if the received address lengths differs from
+ *                      the registered values.
+ * @returns             ENOENT if the device is not found in the cache.
+ * @returns             ENOENT if the protocol for the device is not found in
+ *                      the cache.
+ * @returns             ENOMEM if there is not enough memory left.
+ */
+static int arp_receive_message(device_id_t device_id, packet_t packet)
+{
         ERROR_DECLARE;
 
@@ -475 +413 @@
         arp_proto_ref proto;
         measured_string_ref hw_source;
-        uint8_t * src_hw;
-        uint8_t * src_proto;
-        uint8_t * des_hw;
-        uint8_t * des_proto;
+        uint8_t *src_hw;
+        uint8_t *src_proto;
+        uint8_t *des_hw;
+        uint8_t *des_proto;
 
         length = packet_get_data_length(packet);
-        if(length <= sizeof(arp_header_t)){
+        if (length <= sizeof(arp_header_t))
                 return EINVAL;
-        }
+
         device = arp_cache_find(&arp_globals.cache, device_id);
-        if(! device){
+        if (!device)
                 return ENOENT;
-        }
+
         header = (arp_header_ref) packet_get_data(packet);
-        if((ntohs(header->hardware) != device->hardware)
-                || (length < sizeof(arp_header_t) + header->hardware_length * 2u + header->protocol_length * 2u)){
+        if ((ntohs(header->hardware) != device->hardware) ||
+            (length < sizeof(arp_header_t) + header->hardware_length * 2U +
+            header->protocol_length * 2U)) {
                 return EINVAL;
         }
-        proto = arp_protos_find(&device->protos, protocol_unmap(device->service, ntohs(header->protocol)));
-        if(! proto){
+
+        proto = arp_protos_find(&device->protos,
+            protocol_unmap(device->service, ntohs(header->protocol)));
+        if (!proto)
                 return ENOENT;
-        }
+
         src_hw = ((uint8_t *) header) + sizeof(arp_header_t);
         src_proto = src_hw + header->hardware_length;
         des_hw = src_proto + header->protocol_length;
         des_proto = des_hw + header->hardware_length;
-        hw_source = arp_addr_find(&proto->addresses, (char *) src_proto, CONVERT_SIZE(uint8_t, char, header->protocol_length));
+        hw_source = arp_addr_find(&proto->addresses, (char *) src_proto,
+            CONVERT_SIZE(uint8_t, char, header->protocol_length));
         // exists?
-        if(hw_source){
-                if(hw_source->length != CONVERT_SIZE(uint8_t, char, header->hardware_length)){
+        if (hw_source) {
+                if (hw_source->length != CONVERT_SIZE(uint8_t, char,
+                    header->hardware_length)) {
                         return EINVAL;
                 }
@@ -510 +453 @@
         }
         // is my protocol address?
-        if(proto->addr->length != CONVERT_SIZE(uint8_t, char, header->protocol_length)){
+        if (proto->addr->length != CONVERT_SIZE(uint8_t, char,
+            header->protocol_length)) {
                 return EINVAL;
         }
-        if(! str_lcmp(proto->addr->value, (char *) des_proto, proto->addr->length)){
+        if (!str_lcmp(proto->addr->value, (char *) des_proto,
+            proto->addr->length)) {
                 // not already upadted?
-                if(! hw_source){
-                        hw_source = measured_string_create_bulk((char *) src_hw, CONVERT_SIZE(uint8_t, char, header->hardware_length));
-                        if(! hw_source){
+                if (!hw_source) {
+                        hw_source = measured_string_create_bulk((char *) src_hw,
+                            CONVERT_SIZE(uint8_t, char,
+                            header->hardware_length));
+                        if (!hw_source)
                                 return ENOMEM;
-                        }
-                        ERROR_PROPAGATE(arp_addr_add(&proto->addresses, (char *) src_proto, CONVERT_SIZE(uint8_t, char, header->protocol_length), hw_source));
-                }
-                if(ntohs(header->operation) == ARPOP_REQUEST){
+
+                        ERROR_PROPAGATE(arp_addr_add(&proto->addresses,
+                            (char *) src_proto, CONVERT_SIZE(uint8_t, char,
+                            header->protocol_length), hw_source));
+                }
+                if (ntohs(header->operation) == ARPOP_REQUEST) {
                         header->operation = htons(ARPOP_REPLY);
                         memcpy(des_proto, src_proto, header->protocol_length);
-                        memcpy(src_proto, proto->addr->value, header->protocol_length);
-                        memcpy(src_hw, device->addr->value, device->packet_dimension.addr_len);
-                        memcpy(des_hw, hw_source->value, header->hardware_length);
-                        ERROR_PROPAGATE(packet_set_addr(packet, src_hw, des_hw, header->hardware_length));
-                        nil_send_msg(device->phone, device_id, packet, SERVICE_ARP);
+                        memcpy(src_proto, proto->addr->value,
+                            header->protocol_length);
+                        memcpy(src_hw, device->addr->value,
+                            device->packet_dimension.addr_len);
+                        memcpy(des_hw, hw_source->value,
+                            header->hardware_length);
+                        ERROR_PROPAGATE(packet_set_addr(packet, src_hw, des_hw,
+                            header->hardware_length));
+                        nil_send_msg(device->phone, device_id, packet,
+                            SERVICE_ARP);
                         return 1;
                 }
         }
-        return EOK;
-}
-
-measured_string_ref arp_translate_message(device_id_t device_id, services_t protocol, measured_string_ref target){
+
+        return EOK;
+}
+
+
+/** Returns the hardware address for the given protocol address.
+ *
+ * Sends the ARP request packet if the hardware address is not found in the
+ * cache.
+ *
+ * @param[in] device_id The device identifier.
+ * @param[in] protocol  The protocol service.
+ * @param[in] target    The target protocol address.
+ * @returns             The hardware address of the target.
+ * @returns             NULL if the target parameter is NULL.
+ * @returns             NULL if the device is not found.
+ * @returns             NULL if the device packet is too small to send a
+ *                      request.
+ * @returns             NULL if the hardware address is not found in the cache.
+ */
+static measured_string_ref
+arp_translate_message(device_id_t device_id, services_t protocol,
+    measured_string_ref target)
+{
         arp_device_ref device;
         arp_proto_ref proto;
@@ -544 +518 @@
         arp_header_ref header;
 
-        if(! target){
+        if (!target)
                 return NULL;
-        }
+
         device = arp_cache_find(&arp_globals.cache, device_id);
-        if(! device){
+        if (!device)
                 return NULL;
-        }
+
         proto = arp_protos_find(&device->protos, protocol);
-        if((! proto) || (proto->addr->length != target->length)){
+        if (!proto || (proto->addr->length != target->length))
                 return NULL;
-        }
+
         addr = arp_addr_find(&proto->addresses, target->value, target->length);
-        if(addr){
+        if (addr)
                 return addr;
-        }
+
         // ARP packet content size = header + (address + translation) * 2
-        length = 8 + (CONVERT_SIZE(char, uint8_t, proto->addr->length) + CONVERT_SIZE(char, uint8_t, device->addr->length)) * 2;
-        if(length > device->packet_dimension.content){
+        length = 8 + 2 * (CONVERT_SIZE(char, uint8_t, proto->addr->length) +
+            CONVERT_SIZE(char, uint8_t, device->addr->length));
+        if (length > device->packet_dimension.content)
                 return NULL;
-        }
-        packet = packet_get_4_remote(arp_globals.net_phone, device->packet_dimension.addr_len, device->packet_dimension.prefix, length, device->packet_dimension.suffix);
-        if(! packet){
+
+        packet = packet_get_4_remote(arp_globals.net_phone,
+            device->packet_dimension.addr_len, device->packet_dimension.prefix,
+            length, device->packet_dimension.suffix);
+        if (!packet)
                 return NULL;
-        }
+
         header = (arp_header_ref) packet_suffix(packet, length);
-        if(! header){
+        if (!header) {
                 pq_release_remote(arp_globals.net_phone, packet_get_id(packet));
                 return NULL;
         }
+
         header->hardware = htons(device->hardware);
         header->hardware_length = (uint8_t) device->addr->length;
@@ -579 +557 @@
         header->operation = htons(ARPOP_REQUEST);
         length = sizeof(arp_header_t);
-        memcpy(((uint8_t *) header) + length, device->addr->value, device->addr->length);
+        memcpy(((uint8_t *) header) + length, device->addr->value,
+            device->addr->length);
         length += device->addr->length;
-        memcpy(((uint8_t *) header) + length, proto->addr->value, proto->addr->length);
+        memcpy(((uint8_t *) header) + length, proto->addr->value,
+            proto->addr->length);
         length += proto->addr->length;
         bzero(((uint8_t *) header) + length, device->addr->length);
         length += device->addr->length;
         memcpy(((uint8_t *) header) + length, target->value, target->length);
-        if(packet_set_addr(packet, (uint8_t *) device->addr->value, (uint8_t *) device->broadcast_addr->value, CONVERT_SIZE(char, uint8_t, device->addr->length)) != EOK){
+
+        if (packet_set_addr(packet, (uint8_t *) device->addr->value,
+            (uint8_t *) device->broadcast_addr->value,
+            CONVERT_SIZE(char, uint8_t, device->addr->length)) != EOK) {
                 pq_release_remote(arp_globals.net_phone, packet_get_id(packet));
                 return NULL;
         }
+
         nil_send_msg(device->phone, device_id, packet, SERVICE_ARP);
         return NULL;
 }
 
+
+/** Processes the ARP message.
+ *
+ * @param[in] callid    The message identifier.
+ * @param[in] call      The message parameters.
+ * @param[out] answer   The message answer parameters.
+ * @param[out] answer_count The last parameter for the actual answer in the
+ *                      answer parameter.
+ * @returns             EOK on success.
+ * @returns             ENOTSUP if the message is not known.
+ *
+ * @see arp_interface.h
+ * @see IS_NET_ARP_MESSAGE()
+ */
+int
+arp_message_standalone(ipc_callid_t callid, ipc_call_t *call,
+    ipc_call_t *answer, int *answer_count)
+{
+        ERROR_DECLARE;
+        
+        measured_string_ref address;
+        measured_string_ref translation;
+        char *data;
+        packet_t packet;
+        packet_t next;
+        
+        *answer_count = 0;
+        switch (IPC_GET_METHOD(*call)) {
+        case IPC_M_PHONE_HUNGUP:
+                return EOK;
+        
+        case NET_ARP_DEVICE:
+                ERROR_PROPAGATE(measured_strings_receive(&address, &data, 1));
+                if (ERROR_OCCURRED(arp_device_message(IPC_GET_DEVICE(call),
+                    IPC_GET_SERVICE(call), ARP_GET_NETIF(call), address))) {
+                        free(address);
+                        free(data);
+                }
+                return ERROR_CODE;
+        
+        case NET_ARP_TRANSLATE:
+                ERROR_PROPAGATE(measured_strings_receive(&address, &data, 1));
+                fibril_rwlock_read_lock(&arp_globals.lock);
+                translation = arp_translate_message(IPC_GET_DEVICE(call),
+                    IPC_GET_SERVICE(call), address);
+                free(address);
+                free(data);
+                if (!translation) {
+                        fibril_rwlock_read_unlock(&arp_globals.lock);
+                        return ENOENT;
+                }
+                ERROR_CODE = measured_strings_reply(translation, 1);
+                fibril_rwlock_read_unlock(&arp_globals.lock);
+                return ERROR_CODE;
+
+        case NET_ARP_CLEAR_DEVICE:
+                return arp_clear_device_req(0, IPC_GET_DEVICE(call));
+
+        case NET_ARP_CLEAR_ADDRESS:
+                ERROR_PROPAGATE(measured_strings_receive(&address, &data, 1));
+                arp_clear_address_req(0, IPC_GET_DEVICE(call),
+                    IPC_GET_SERVICE(call), address);
+                free(address);
+                free(data);
+                return EOK;
+        
+        case NET_ARP_CLEAN_CACHE:
+                return arp_clean_cache_req(0);
+        
+        case NET_IL_DEVICE_STATE:
+                // do nothing - keep the cache
+                return EOK;
+        
+        case NET_IL_RECEIVED:
+                if (ERROR_NONE(packet_translate_remote(arp_globals.net_phone,
+                    &packet, IPC_GET_PACKET(call)))) {
+                        fibril_rwlock_read_lock(&arp_globals.lock);
+                        do {
+                                next = pq_detach(packet);
+                                ERROR_CODE =
+                                    arp_receive_message(IPC_GET_DEVICE(call),
+                                    packet);
+                                if (ERROR_CODE != 1) {
+                                        pq_release_remote(arp_globals.net_phone,
+                                            packet_get_id(packet));
+                                }
+                                packet = next;
+                        } while (packet);
+                        fibril_rwlock_read_unlock(&arp_globals.lock);
+                }
+                return ERROR_CODE;
+        
+        case NET_IL_MTU_CHANGED:
+                return arp_mtu_changed_message(IPC_GET_DEVICE(call),
+                    IPC_GET_MTU(call));
+        }
+        
+        return ENOTSUP;
+}
+
 /** Default thread for new connections.
  *
- *  @param[in] iid The initial message identifier.
- *  @param[in] icall The initial message call structure.
- *
- */
-static void il_client_connection(ipc_callid_t iid, ipc_call_t * icall)
+ * @param[in] iid       The initial message identifier.
+ * @param[in] icall     The initial message call structure.
+ */
+static void il_client_connection(ipc_callid_t iid, ipc_call_t *icall)
 {
         /*
@@ -608 +691 @@
         ipc_answer_0(iid, EOK);
         
-        while(true) {
+        while (true) {
                 ipc_call_t answer;
                 int answer_count;
@@ -623 +706 @@
                     &answer_count);
                 
-                /* End if said to either by the message or the processing result */
-                if ((IPC_GET_METHOD(call) == IPC_M_PHONE_HUNGUP) || (res == EHANGUP))
+                /*
+                 * End if told to either by the message or the processing
+                 * result.
+                 */
+                if ((IPC_GET_METHOD(call) == IPC_M_PHONE_HUNGUP) ||
+                    (res == EHANGUP))
                         return;
                 
@@ -634 +721 @@
 /** Starts the module.
  *
- *  @param argc The count of the command line arguments. Ignored parameter.
- *  @param argv The command line parameters. Ignored parameter.
- *
- *  @returns EOK on success.
- *  @returns Other error codes as defined for each specific module start function.
- *
+ * @returns             EOK on success.
+ * @returns             Other error codes as defined for each specific module
+ *                      start function.
  */
 int main(int argc, char *argv[])
@@ -646 +730 @@
         
         /* Start the module */
-        if (ERROR_OCCURRED(il_module_start_standalone(il_client_connection)))
-                return ERROR_CODE;
-        
+        ERROR_PROPAGATE(il_module_start_standalone(il_client_connection));
         return EOK;
 }
@@ -654 +736 @@
 /** @}
  */
+

uspace/srv/net/il/arp/arp.h

@@ -28 +28 @@
 
 /** @addtogroup arp
- *  @{
+ * @{
  */
 
 /** @file
- *  ARP module.
+ * ARP module.
  */
 
-#ifndef __NET_ARP_H__
-#define __NET_ARP_H__
+#ifndef NET_ARP_H_
+#define NET_ARP_H_
 
 #include <fibril_synch.h>
@@ -44 +44 @@
 
 #include <net/device.h>
+#include <net/packet.h>
 #include <net_hardware.h>
 #include <adt/generic_char_map.h>
@@ -49 +50 @@
 #include <adt/measured_strings.h>
 
-
 /** Type definition of the ARP device specific data.
- *  @see arp_device
+ * @see arp_device
  */
-typedef struct arp_device       arp_device_t;
+typedef struct arp_device arp_device_t;
 
 /** Type definition of the ARP device specific data pointer.
- *  @see arp_device
+ * @see arp_device
  */
-typedef arp_device_t *          arp_device_ref;
+typedef arp_device_t *arp_device_ref;
 
 /** Type definition of the ARP global data.
- *  @see arp_globals
+ * @see arp_globals
  */
-typedef struct arp_globals      arp_globals_t;
+typedef struct arp_globals arp_globals_t;
 
 /** Type definition of the ARP protocol specific data.
- *  @see arp_proto
+ * @see arp_proto
  */
-typedef struct arp_proto        arp_proto_t;
+typedef struct arp_proto arp_proto_t;
 
 /** Type definition of the ARP protocol specific data pointer.
- *  @see arp_proto
+ * @see arp_proto
  */
-typedef arp_proto_t *           arp_proto_ref;
+typedef arp_proto_t *arp_proto_ref;
 
 /** ARP address map.
- *  Translates addresses.
- *  @see generic_char_map.h
+ *
+ * Translates addresses.
+ * @see generic_char_map.h
  */
-GENERIC_CHAR_MAP_DECLARE(arp_addr, measured_string_t)
+GENERIC_CHAR_MAP_DECLARE(arp_addr, measured_string_t);
 
 /** ARP address cache.
- *  Maps devices to the ARP device specific data.
- *  @see device.h
+ *
+ * Maps devices to the ARP device specific data.
+ * @see device.h
  */
-DEVICE_MAP_DECLARE(arp_cache, arp_device_t)
+DEVICE_MAP_DECLARE(arp_cache, arp_device_t);
 
 /** ARP protocol map.
- *  Maps protocol identifiers to the ARP protocol specific data.
- *  @see int_map.h
+ *
+ * Maps protocol identifiers to the ARP protocol specific data.
+ * @see int_map.h
  */
-INT_MAP_DECLARE(arp_protos, arp_proto_t)
+INT_MAP_DECLARE(arp_protos, arp_proto_t);
 
-/** ARP device specific data.
- */
-struct arp_device{
-        /** Actual device hardware address.
-         */
+/** ARP device specific data. */
+struct arp_device {
+        /** Actual device hardware address. */
         measured_string_ref addr;
-        /** Actual device hardware address data.
-         */
-        char * addr_data;
-        /** Broadcast device hardware address.
-         */
+        /** Actual device hardware address data. */
+        char *addr_data;
+        /** Broadcast device hardware address. */
         measured_string_ref broadcast_addr;
-        /** Broadcast device hardware address data.
-         */
-        char * broadcast_data;
-        /** Device identifier.
-         */
+        /** Broadcast device hardware address data. */
+        char *broadcast_data;
+        /** Device identifier. */
         device_id_t device_id;
-        /** Hardware type.
-         */
+        /** Hardware type. */
         hw_type_t hardware;
-        /** Packet dimension.
-         */
+        /** Packet dimension. */
         packet_dimension_t packet_dimension;
-        /** Device module phone.
-         */
+        /** Device module phone. */
         int phone;
-        /** Protocol map.
-         *  Address map for each protocol.
+        
+        /**
+         * Protocol map.
+         * Address map for each protocol.
          */
         arp_protos_t protos;
-        /** Device module service.
-         */
+        
+        /** Device module service. */
         services_t service;
 };
 
-/** ARP global data.
- */
-struct  arp_globals{
-        /** ARP address cache.
-         */
+/** ARP global data. */
+struct arp_globals {
+        /** ARP address cache. */
         arp_cache_t cache;
-        /** The client connection processing function.
-         *  The module skeleton propagates its own one.
+        
+        /**
+         * The client connection processing function.
+         * The module skeleton propagates its own one.
          */
         async_client_conn_t client_connection;
-        /** Networking module phone.
-         */
+        
+        /** Networking module phone. */
         int net_phone;
-        /** Safety lock.
-         */
+        /** Safety lock. */
         fibril_rwlock_t lock;
 };
 
-/** ARP protocol specific data.
- */
-struct arp_proto{
-        /** Actual device protocol address.
-         */
+/** ARP protocol specific data. */
+struct arp_proto {
+        /** Actual device protocol address. */
         measured_string_ref addr;
-        /** Actual device protocol address data.
-         */
-        char * addr_data;
-        /** Address map.
-         */
+        /** Actual device protocol address data. */
+        char *addr_data;
+        /** Address map. */
         arp_addr_t addresses;
-        /** Protocol service.
-         */
+        /** Protocol service. */
         services_t service;
 };

uspace/srv/net/il/arp/arp_header.h

@@ -32 +32 @@
 
 /** @file
- *  ARP protocol header.
- *  Based on the RFC~826.
+ * ARP protocol header.
+ * Based on the RFC 826.
  */
 
-#ifndef __NET_ARP_HEADER_H__
-#define __NET_ARP_HEADER_H__
+#ifndef NET_ARP_HEADER_H_
+#define NET_ARP_HEADER_H_
 
 #include <sys/types.h>
 
 /** Type definition of an ARP protocol header.
- *  @see arp_header
+ * @see arp_header
  */
-typedef struct arp_header       arp_header_t;
+typedef struct arp_header arp_header_t;
 
 /** Type definition of an ARP protocol header pointer.
- *  @see arp_header
+ * @see arp_header
  */
-typedef arp_header_t *          arp_header_ref;
+typedef arp_header_t *arp_header_ref;
 
-/** ARP protocol header.
- */
-struct arp_header{
-        /** Hardware type identifier.
-         *  @see hardware.h
+/** ARP protocol header. */
+struct arp_header {
+        /**
+         * Hardware type identifier.
+         * @see hardware.h
          */
         uint16_t hardware;
-        /** Protocol identifier.
-         */
+        
+        /** Protocol identifier. */
         uint16_t protocol;
-        /** Hardware address length in bytes.
-         */
+        /** Hardware address length in bytes. */
         uint8_t hardware_length;
-        /** Protocol address length in bytes.
-         */
+        /** Protocol address length in bytes. */
         uint8_t protocol_length;
-        /** ARP packet type.
-         *  @see arp_oc.h
+        
+        /**
+         * ARP packet type.
+         * @see arp_oc.h
          */
         uint16_t operation;

uspace/srv/net/il/arp/arp_module.c

@@ -32 +32 @@
 
 /** @file
- *  ARP standalone module implementation.
- *  Contains skeleton module functions mapping.
- *  The functions are used by the module skeleton as module specific entry points.
- *  @see module.c
+ * ARP standalone module implementation.
+ * Contains skeleton module functions mapping.
+ * The functions are used by the module skeleton as module specific entry
+ * points.
+ * @see module.c
  */
 
@@ -53 +54 @@
 #include "arp_module.h"
 
-/** ARP module global data.
- */
-extern arp_globals_t    arp_globals;
+/** ARP module global data. */
+extern arp_globals_t arp_globals;
 
-int il_module_message_standalone(ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count){
+int
+il_module_message_standalone(ipc_callid_t callid, ipc_call_t *call,
+    ipc_call_t *answer, int *answer_count)
+{
         return arp_message_standalone(callid, call, answer, answer_count);
 }
 
-int il_module_start_standalone(async_client_conn_t client_connection){
+int il_module_start_standalone(async_client_conn_t client_connection)
+{
         ERROR_DECLARE;
         
@@ -69 +73 @@
         
         ipcarg_t phonehash;
-        if (ERROR_OCCURRED(arp_initialize(client_connection))
-            || ERROR_OCCURRED(REGISTER_ME(SERVICE_ARP, &phonehash))) {
+        if (ERROR_OCCURRED(arp_initialize(client_connection)) ||
+            ERROR_OCCURRED(REGISTER_ME(SERVICE_ARP, &phonehash))) {
                 pm_destroy();
                 return ERROR_CODE;

uspace/srv/net/il/arp/arp_module.h

@@ -28 +28 @@
 
 /** @addtogroup arp
- *  @{
+ * @{
  */
 
 /** @file
- *  ARP module functions.
- *  The functions are used as ARP module entry points.
+ * ARP module functions.
+ * The functions are used as ARP module entry points.
  */
 
-#ifndef __NET_ARP_MODULE_H__
-#define __NET_ARP_MODULE_H__
+#ifndef NET_ARP_MODULE_H_
+#define NET_ARP_MODULE_H_
 
 #include <ipc/ipc.h>
+#include <async.h>
 
-/** Initializes the ARP module.
- *  @param[in] client_connection The client connection processing function. The module skeleton propagates its own one.
- *  @returns EOK on success.
- *  @returns ENOMEM if there is not enough memory left.
- */
-int arp_initialize(async_client_conn_t client_connection);
-
-/** Processes the ARP message.
- *  @param[in] callid The message identifier.
- *  @param[in] call The message parameters.
- *  @param[out] answer The message answer parameters.
- *  @param[out] answer_count The last parameter for the actual answer in the answer parameter.
- *  @returns EOK on success.
- *  @returns ENOTSUP if the message is not known.
- *  @see arp_interface.h
- *  @see IS_NET_ARP_MESSAGE()
- */
-int arp_message_standalone(ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count);
+extern int arp_initialize(async_client_conn_t);
+extern int arp_message_standalone(ipc_callid_t, ipc_call_t *, ipc_call_t *,
+    int *);
 
 #endif

uspace/srv/net/il/arp/arp_oc.h

@@ -32 +32 @@
 
 /** @file
- *  ARP operation codes according to the on-line IANA - Address Resolution Protocol (ARP) Parameters - <http://www.iana.org/assignments/arp-parameters/arp-parameters.xml>, cited January 14 2009.
+ * ARP operation codes according to the on-line IANA - Address Resolution
+ * Protocol (ARP) Parameters
+ * http://www.iana.org/assignments/arp-parameters/arp-parameters.xml
+ * cited January 14 2009.
  */
 
-#ifndef __NET_ARP_ARPOP_H__
-#define __NET_ARP_ARPOP_H__
+#ifndef NET_ARP_ARPOP_H_
+#define NET_ARP_ARPOP_H_
 
-/** @name ARP operation codes definitions
- */
+/** @name ARP operation codes definitions */
 /*@{*/
 
-/** REQUEST operation code.
- */
-#define ARPOP_REQUEST                                   1
+/** REQUEST operation code. */
+#define ARPOP_REQUEST   1
 
-/** REPLY operation code.
- */
-#define ARPOP_REPLY                                             2
-
-/** Reverse request operation code.
- */
-#define ARPOP_RREQUEST                                  3
-
-/** Reverse reply operation code.
- */
-#define ARPOP_RREPLY                                    4
-
-/** DRARP-Request operation code.
- */
-#define ARPOP_DRARP_Request                             5
-
-/** DRARP-Reply operation code.
- */
-#define ARPOP_DRARP_Reply                               6
-
-/** DRARP-Error operation code.
- */
-#define ARPOP_DRARP_Error                               7
-
-/** InARP-Request operation code.
- */
-#define ARPOP_InREQUEST                                 8
-
-/** InARP-Reply operation code.
- */
-#define ARPOP_InREPLY                                   9
-
-/** ARP-NAK operation code.
- */
-#define ARPOP_NAK                                               10
-
-/** MARS-Request operation code.
- */
-#define ARPOP_MARS_Request                              11
-
-/** MARS-Multi operation code.
- */
-#define ARPOP_MARS_Multi                                12
-
-/** MARS-MServ operation code.
- */
-#define ARPOP_MARS_MServ                                13
-
-/** MARS-Join operation code.
- */
-#define ARPOP_MARS_Join                                 14
-
-/** MARS-Leave operation code.
- */
-#define ARPOP_MARS_Leave                                15
-
-/** MARS-NAK operation code.
- */
-#define ARPOP_MARS_NAK                                  16
-
-/** MARS-Unserv operation code.
- */
-#define ARPOP_MARS_Unserv                               17
-
-/** MARS-SJoin operation code.
- */
-#define ARPOP_MARS_SJoin                                18
-
-/** MARS-SLeave operation code.
- */
-#define ARPOP_MARS_SLeave                               19
-
-/** MARS-Grouplist-Request operation code.
- */
-#define ARPOP_MARS_Grouplist_Request    20
-
-/** MARS-Grouplist-Reply operation code.
- */
-#define ARPOP_MARS_Grouplist_Reply              21
-
-/** MARS-Redirect-Map operation code.
- */
-#define ARPOP_MARS_Redirect_Map                 22
-
-/** MAPOS-UNARP operation code.
- */
-#define ARPOP_MAPOS_UNARP                               23
+/** REPLY operation code. */
+#define ARPOP_REPLY     2
 
 /*@}*/

uspace/srv/net/il/ip/ip.c

@@ -28 +28 @@
 
 /** @addtogroup ip
- *  @{
+ * @{
  */
 
 /** @file
- *  IP module implementation.
- *  @see arp.h
- */
+ * IP module implementation.
+ * @see arp.h
+ */
+
+#include "ip.h"
+#include "ip_module.h"
 
 #include <async.h>
@@ -51 +54 @@
 #include <byteorder.h>
 
+#include <adt/measured_strings.h>
+#include <adt/module_map.h>
+
+#include <packet_client.h>
 #include <net/socket_codes.h>
 #include <net/in.h>
@@ -71 +78 @@
 #include <nil_interface.h>
 #include <tl_interface.h>
-#include <adt/measured_strings.h>
-#include <adt/module_map.h>
-#include <packet_client.h>
 #include <packet_remote.h>
 #include <il_local.h>
 
-#include "ip.h"
-#include "ip_module.h"
-#include "ip_local.h"
-
-/** IP module name.
- */
-#define NAME  "ip"
-
-/** IP version 4.
- */
-#define IPV4                            4
-
-/** Default network interface IP version.
- */
+/** IP module name. */
+#define NAME                    "ip"
+
+/** IP version 4. */
+#define IPV4                    4
+
+/** Default network interface IP version. */
 #define NET_DEFAULT_IPV         IPV4
 
-/** Default network interface IP routing.
- */
+/** Default network interface IP routing. */
 #define NET_DEFAULT_IP_ROUTING  false
 
-/** Minimum IP packet content.
- */
-#define IP_MIN_CONTENT  576
-
-/** ARP module name.
- */
-#define ARP_NAME                                "arp"
-
-/** ARP module filename.
- */
-#define ARP_FILENAME                    "/srv/arp"
-
-/** IP packet address length.
- */
-#define IP_ADDR                                                 sizeof(struct sockaddr_in6)
-
-/** IP packet prefix length.
- */
-#define IP_PREFIX                                               sizeof(ip_header_t)
-
-/** IP packet suffix length.
- */
-#define IP_SUFFIX                                               0
-
-/** IP packet maximum content length.
- */
-#define IP_MAX_CONTENT                                  65535
-
-/** The IP localhost address.
- */
+/** Minimum IP packet content. */
+#define IP_MIN_CONTENT          576
+
+/** ARP module name. */
+#define ARP_NAME                "arp"
+
+/** ARP module filename. */
+#define ARP_FILENAME            "/srv/arp"
+
+/** IP packet address length. */
+#define IP_ADDR                 sizeof(struct sockaddr_in6)
+
+/** IP packet prefix length. */
+#define IP_PREFIX               sizeof(ip_header_t)
+
+/** IP packet suffix length. */
+#define IP_SUFFIX               0
+
+/** IP packet maximum content length. */
+#define IP_MAX_CONTENT          65535
+
+/** The IP localhost address. */
 #define IPV4_LOCALHOST_ADDRESS  htonl((127 << 24) + 1)
 
-/** IP global data.
- */
-ip_globals_t    ip_globals;
-
-DEVICE_MAP_IMPLEMENT(ip_netifs, ip_netif_t)
-
-INT_MAP_IMPLEMENT(ip_protos, ip_proto_t)
-
-GENERIC_FIELD_IMPLEMENT(ip_routes, ip_route_t)
-
-/** Updates the device content length according to the new MTU value.
- *  @param[in] device_id The device identifier.
- *  @param[in] mtu The new mtu value.
- *  @returns EOK on success.
- *  @returns ENOENT if device is not found.
- */
-int ip_mtu_changed_message(device_id_t device_id, size_t mtu);
-
-/** Updates the device state.
- *  @param[in] device_id The device identifier.
- *  @param[in] state The new state value.
- *  @returns EOK on success.
- *  @returns ENOENT if device is not found.
- */
-int ip_device_state_message(device_id_t device_id, device_state_t state);
-
-/** Returns the device packet dimensions for sending.
- *  @param[in] phone The service module phone.
- *  @param[in] message The service specific message.
- *  @param[in] device_id The device identifier.
- *  @param[out] addr_len The minimum reserved address length.
- *  @param[out] prefix The minimum reserved prefix size.
- *  @param[out] content The maximum content size.
- *  @param[out] suffix The minimum reserved suffix size.
- *  @returns EOK on success.
- */
-int ip_packet_size_message(device_id_t device_id, size_t * addr_len, size_t * prefix, size_t * content, size_t * suffix);
-
-/** Registers the transport layer protocol.
- *  The traffic of this protocol will be supplied using either the receive function or IPC message.
- *  @param[in] protocol The transport layer module protocol.
- *  @param[in] service The transport layer module service.
- *  @param[in] phone The transport layer module phone.
- *  @param[in] tl_received_msg The receiving function.
- *  @returns EOK on success.
- *  @returns EINVAL if the protocol parameter and/or the service parameter is zero (0).
- *  @returns EINVAL if the phone parameter is not a positive number and the tl_receive_msg is NULL.
- *  @returns ENOMEM if there is not enough memory left.
- */
-int ip_register(int protocol, services_t service, int phone, tl_received_msg_t tl_received_msg);
-
-/** Initializes a new network interface specific data.
- *  Connects to the network interface layer module, reads the netif configuration, starts an ARP module if needed and sets the netif routing table.
- *  The device identifier and the nil service has to be set.
- *  @param[in,out] ip_netif Network interface specific data.
- *  @returns EOK on success.
- *  @returns ENOTSUP if DHCP is configured.
- *  @returns ENOTSUP if IPv6 is configured.
- *  @returns EINVAL if any of the addresses is invalid.
- *  @returns EINVAL if the used ARP module is not known.
- *  @returns ENOMEM if there is not enough memory left.
- *  @returns Other error codes as defined for the net_get_device_conf_req() function.
- *  @returns Other error codes as defined for the bind_service() function.
- *  @returns Other error codes as defined for the specific arp_device_req() function.
- *  @returns Other error codes as defined for the nil_packet_size_req() function.
- */
-int ip_netif_initialize(ip_netif_ref ip_netif);
-
-/** Sends the packet or the packet queue via the specified route.
- *  The ICMP_HOST_UNREACH error notification may be sent if route hardware destination address is found.
- *  @param[in,out] packet The packet to be sent.
- *  @param[in] netif The target network interface.
- *  @param[in] route The target route.
- *  @param[in] src The source address.
- *  @param[in] dest The destination address.
- *  @param[in] error The error module service.
- *  @returns EOK on success.
- *  @returns Other error codes as defined for the arp_translate_req() function.
- *  @returns Other error codes as defined for the ip_prepare_packet() function.
- */
-int ip_send_route(packet_t packet, ip_netif_ref netif, ip_route_ref route, in_addr_t * src, in_addr_t dest, services_t error);
-
-/** Prepares the outgoing packet or the packet queue.
- *  The packet queue is a fragmented packet
- *  Updates the first packet's IP header.
- *  Prefixes the additional packets with fragment headers.
- *  @param[in] source The source address.
- *  @param[in] dest The destination address.
- *  @param[in,out] packet The packet to be sent.
- *  @param[in] destination The destination hardware address.
- *  @returns EOK on success.
- *  @returns EINVAL if the packet is too small to contain the IP header.
- *  @returns EINVAL if the packet is too long than the IP allows.
- *  @returns ENOMEM if there is not enough memory left.
- *  @returns Other error codes as defined for the packet_set_addr() function.
- */
-int ip_prepare_packet(in_addr_t * source, in_addr_t dest, packet_t packet, measured_string_ref destination);
-
-/** Checks the packet queue lengths and fragments the packets if needed.
- *  The ICMP_FRAG_NEEDED error notification may be sent if the packet needs to be fragmented and the fragmentation is not allowed.
- *  @param[in,out] packet The packet or the packet queue to be checked.
- *  @param[in] prefix The minimum prefix size.
- *  @param[in] content The maximum content size.
- *  @param[in] suffix The minimum suffix size.
- *  @param[in] addr_len The minimum address length.
- *  @param[in] error The error module service.
- *  @returns The packet or the packet queue of the allowed length.
- *  @returns NULL if there are no packets left.
- */
-packet_t ip_split_packet(packet_t packet, size_t prefix, size_t content, size_t suffix, socklen_t addr_len, services_t error);
-
-/** Checks the packet length and fragments it if needed.
- *  The new fragments are queued before the original packet.
- *  @param[in,out] packet The packet to be checked.
- *  @param[in] length The maximum packet length.
- *  @param[in] prefix The minimum prefix size.
- *  @param[in] suffix The minimum suffix size.
- *  @param[in] addr_len The minimum address length.
- *  @returns EOK on success.
- *  @returns EINVAL if the packet_get_addr() function fails.
- *  @returns EINVAL if the packet does not contain the IP header.
- *  @returns EPERM if the packet needs to be fragmented and the fragmentation is not allowed.
- *  @returns ENOMEM if there is not enough memory left.
- *  @returns ENOMEM if there is no packet available.
- *  @returns ENOMEM if the packet is too small to contain the IP header.
- *  @returns Other error codes as defined for the packet_trim() function.
- *  @returns Other error codes as defined for the ip_create_middle_header() function.
- *  @returns Other error codes as defined for the ip_fragment_packet_data() function.
- */
-int ip_fragment_packet(packet_t packet, size_t length, size_t prefix, size_t suffix, socklen_t addr_len);
-
-/** Fragments the packet from the end.
- *  @param[in] packet The packet to be fragmented.
- *  @param[in,out] new_packet The new packet fragment.
- *  @param[in,out] header The original packet header.
- *  @param[in,out] new_header The new packet fragment header.
- *  @param[in] length The new fragment length.
- *  @param[in] src The source address.
- *  @param[in] dest The destiantion address.
- *  @param[in] addrlen The address length.
- *  @returns EOK on success.
- *  @returns ENOMEM if the target packet is too small.
- *  @returns Other error codes as defined for the packet_set_addr() function.
- *  @returns Other error codes as defined for the pq_insert_after() function.
- */
-int ip_fragment_packet_data(packet_t packet, packet_t new_packet, ip_header_ref header, ip_header_ref new_header, size_t length, const struct sockaddr * src, const struct sockaddr * dest, socklen_t addrlen);
-
-/** Prefixes a middle fragment header based on the last fragment header to the packet.
- *  @param[in] packet The packet to be prefixed.
- *  @param[in] last The last header to be copied.
- *  @returns The prefixed middle header.
- *  @returns NULL on error.
- */
-ip_header_ref ip_create_middle_header(packet_t packet, ip_header_ref last);
-
-/** Copies the fragment header.
- *  Copies only the header itself and relevant IP options.
- *  @param[out] last The created header.
- *  @param[in] first The original header to be copied.
- */
-void ip_create_last_header(ip_header_ref last, ip_header_ref first);
-
-/** Returns the network interface's IP address.
- *  @param[in] netif The network interface.
- *  @returns The IP address.
- *  @returns NULL if no IP address was found.
- */
-in_addr_t * ip_netif_address(ip_netif_ref netif);
-
-/** Searches all network interfaces if there is a suitable route.
- *  @param[in] destination The destination address.
- *  @returns The found route.
- *  @returns NULL if no route was found.
- */
-ip_route_ref ip_find_route(in_addr_t destination);
-
-/** Searches the network interfaces if there is a suitable route.
- *  @param[in] netif The network interface to be searched for routes. May be NULL.
- *  @param[in] destination The destination address.
- *  @returns The found route.
- *  @returns NULL if no route was found.
- */
-ip_route_ref ip_netif_find_route(ip_netif_ref netif, in_addr_t destination);
-
-/** Processes the received IP packet or the packet queue one by one.
- *  The packet is either passed to another module or released on error.
- *  @param[in] device_id The source device identifier.
- *  @param[in,out] packet The received packet.
- *  @returns EOK on success and the packet is no longer needed.
- *  @returns EINVAL if the packet is too small to carry the IP packet.
- *  @returns EINVAL if the received address lengths differs from the registered values.
- *  @returns ENOENT if the device is not found in the cache.
- *  @returns ENOENT if the protocol for the device is not found in the cache.
- *  @returns ENOMEM if there is not enough memory left.
- */
-int ip_receive_message(device_id_t device_id, packet_t packet);
-
-/** Processes the received packet.
- *  The packet is either passed to another module or released on error.
- *  The ICMP_PARAM_POINTER error notification may be sent if the checksum is invalid.
- *  The ICMP_EXC_TTL error notification may be sent if the TTL is less than two (2).
- *  The ICMP_HOST_UNREACH error notification may be sent if no route was found.
- *  The ICMP_HOST_UNREACH error notification may be sent if the packet is for another host and the routing is disabled.
- *  @param[in] device_id The source device identifier.
- *  @param[in] packet The received packet to be processed.
- *  @returns EOK on success.
- *  @returns EINVAL if the TTL is less than two (2).
- *  @returns EINVAL if the checksum is invalid.
- *  @returns EAFNOSUPPORT if the address family is not supported.
- *  @returns ENOENT if no route was found.
- *  @returns ENOENT if the packet is for another host and the routing is disabled.
- */
-int ip_process_packet(device_id_t device_id, packet_t packet);
-
-/** Returns the packet destination address from the IP header.
- *  @param[in] header The packet IP header to be read.
- *  @returns The packet destination address.
- */
-in_addr_t ip_get_destination(ip_header_ref header);
-
-/** Delivers the packet to the local host.
- *  The packet is either passed to another module or released on error.
- *  The ICMP_PROT_UNREACH error notification may be sent if the protocol is not found.
- *  @param[in] device_id The source device identifier.
- *  @param[in] packet The packet to be delivered.
- *  @param[in] header The first packet IP header. May be NULL.
- *  @param[in] error The packet error service.
- *  @returns EOK on success.
- *  @returns ENOTSUP if the packet is a fragment.
- *  @returns EAFNOSUPPORT if the address family is not supported.
- *  @returns ENOENT if the target protocol is not found.
- *  @returns Other error codes as defined for the packet_set_addr() function.
- *  @returns Other error codes as defined for the packet_trim() function.
- *  @returns Other error codes as defined for the protocol specific tl_received_msg function.
- */
-int ip_deliver_local(device_id_t device_id, packet_t packet, ip_header_ref header, services_t error);
+/** IP global data. */
+ip_globals_t ip_globals;
+
+DEVICE_MAP_IMPLEMENT(ip_netifs, ip_netif_t);
+INT_MAP_IMPLEMENT(ip_protos, ip_proto_t);
+GENERIC_FIELD_IMPLEMENT(ip_routes, ip_route_t);
+
+/** Releases the packet and returns the result.
+ *
+ * @param[in] packet    The packet queue to be released.
+ * @param[in] result    The result to be returned.
+ * @return              The result parameter.
+ */
+static int ip_release_and_return(packet_t packet, int result)
+{
+        pq_release_remote(ip_globals.net_phone, packet_get_id(packet));
+        return result;
+}
+
+/** Returns the ICMP phone.
+ *
+ * Searches the registered protocols.
+ *
+ * @returns             The found ICMP phone.
+ * @returns             ENOENT if the ICMP is not registered.
+ */
+static int ip_get_icmp_phone(void)
+{
+        ip_proto_ref proto;
+        int phone;
+
+        fibril_rwlock_read_lock(&ip_globals.protos_lock);
+        proto = ip_protos_find(&ip_globals.protos, IPPROTO_ICMP);
+        phone = proto ? proto->phone : ENOENT;
+        fibril_rwlock_read_unlock(&ip_globals.protos_lock);
+        return phone;
+}
 
 /** Prepares the ICMP notification packet.
- *  Releases additional packets and keeps only the first one.
- *  All packets is released on error.
- *  @param[in] error The packet error service.
- *  @param[in] packet The packet or the packet queue to be reported as faulty.
- *  @param[in] header The first packet IP header. May be NULL.
- *  @returns The found ICMP phone.
- *  @returns EINVAL if the error parameter is set.
- *  @returns EINVAL if the ICMP phone is not found.
- *  @returns EINVAL if the ip_prepare_icmp() fails.
- */
-int ip_prepare_icmp_and_get_phone(services_t error, packet_t packet, ip_header_ref header);
-
-/** Returns the ICMP phone.
- *  Searches the registered protocols.
- *  @returns The found ICMP phone.
- *  @returns ENOENT if the ICMP is not registered.
- */
-int ip_get_icmp_phone(void);
+ *
+ * Releases additional packets and keeps only the first one.
+ *
+ * @param[in] packet    The packet or the packet queue to be reported as faulty.
+ * @param[in] header    The first packet IP header. May be NULL.
+ * @returns             EOK on success.
+ * @returns             EINVAL if there are no data in the packet.
+ * @returns             EINVAL if the packet is a fragment.
+ * @returns             ENOMEM if the packet is too short to contain the IP
+ *                      header.
+ * @returns             EAFNOSUPPORT if the address family is not supported.
+ * @returns             EPERM if the protocol is not allowed to send ICMP
+ *                      notifications. The ICMP protocol itself.
+ * @returns             Other error codes as defined for the packet_set_addr().
+ */
+static int ip_prepare_icmp(packet_t packet, ip_header_ref header)
+{
+        packet_t next;
+        struct sockaddr *dest;
+        struct sockaddr_in dest_in;
+        socklen_t addrlen;
+
+        // detach the first packet and release the others
+        next = pq_detach(packet);
+        if (next)
+                pq_release_remote(ip_globals.net_phone, packet_get_id(next));
+
+        if (!header) {
+                if (packet_get_data_length(packet) <= sizeof(ip_header_t))
+                        return ENOMEM;
+
+                // get header
+                header = (ip_header_ref) packet_get_data(packet);
+                if (!header)
+                        return EINVAL;
+
+        }
+
+        // only for the first fragment
+        if (IP_FRAGMENT_OFFSET(header))
+                return EINVAL;
+
+        // not for the ICMP protocol
+        if (header->protocol == IPPROTO_ICMP)
+                return EPERM;
+
+        // set the destination address
+        switch (header->version) {
+        case IPVERSION:
+                addrlen = sizeof(dest_in);
+                bzero(&dest_in, addrlen);
+                dest_in.sin_family = AF_INET;
+                memcpy(&dest_in.sin_addr.s_addr, &header->source_address,
+                    sizeof(header->source_address));
+                dest = (struct sockaddr *) &dest_in;
+                break;
+
+        default:
+                return EAFNOSUPPORT;
+        }
+
+        return packet_set_addr(packet, NULL, (uint8_t *) dest, addrlen);
+}
 
 /** Prepares the ICMP notification packet.
- *  Releases additional packets and keeps only the first one.
- *  @param[in] packet The packet or the packet queue to be reported as faulty.
- *  @param[in] header The first packet IP header. May be NULL.
- *  @returns EOK on success.
- *  @returns EINVAL if there are no data in the packet.
- *  @returns EINVAL if the packet is a fragment.
- *  @returns ENOMEM if the packet is too short to contain the IP header.
- *  @returns EAFNOSUPPORT if the address family is not supported.
- *  @returns EPERM if the protocol is not allowed to send ICMP notifications. The ICMP protocol itself.
- *  @returns Other error codes as defined for the packet_set_addr().
- */
-int ip_prepare_icmp(packet_t packet, ip_header_ref header);
-
-/** Releases the packet and returns the result.
- *  @param[in] packet The packet queue to be released.
- *  @param[in] result The result to be returned.
- *  @return The result parameter.
- */
-int ip_release_and_return(packet_t packet, int result);
-
-int ip_initialize(async_client_conn_t client_connection){
+ *
+ * Releases additional packets and keeps only the first one.
+ * All packets are released on error.
+ *
+ * @param[in] error     The packet error service.
+ * @param[in] packet    The packet or the packet queue to be reported as faulty.
+ * @param[in] header    The first packet IP header. May be NULL.
+ * @returns             The found ICMP phone.
+ * @returns             EINVAL if the error parameter is set.
+ * @returns             EINVAL if the ICMP phone is not found.
+ * @returns             EINVAL if the ip_prepare_icmp() fails.
+ */
+static int
+ip_prepare_icmp_and_get_phone(services_t error, packet_t packet,
+    ip_header_ref header)
+{
+        int phone;
+
+        phone = ip_get_icmp_phone();
+        if (error || (phone < 0) || ip_prepare_icmp(packet, header))
+                return ip_release_and_return(packet, EINVAL);
+        return phone;
+}
+
+/** Initializes the IP module.
+ *
+ * @param[in] client_connection The client connection processing function. The
+ *                      module skeleton propagates its own one.
+ * @returns             EOK on success.
+ * @returns             ENOMEM if there is not enough memory left.
+ */
+int ip_initialize(async_client_conn_t client_connection)
+{
         ERROR_DECLARE;
 
@@ -423 +269 @@
         ip_globals.client_connection = client_connection;
         ERROR_PROPAGATE(modules_initialize(&ip_globals.modules));
-        ERROR_PROPAGATE(add_module(NULL, &ip_globals.modules, ARP_NAME, ARP_FILENAME, SERVICE_ARP, 0, arp_connect_module));
+        ERROR_PROPAGATE(add_module(NULL, &ip_globals.modules, ARP_NAME,
+            ARP_FILENAME, SERVICE_ARP, 0, arp_connect_module));
         fibril_rwlock_write_unlock(&ip_globals.lock);
+
         return EOK;
 }
 
-int ip_device_req_local(int il_phone, device_id_t device_id, services_t netif){
+/** Initializes a new network interface specific data.
+ *
+ * Connects to the network interface layer module, reads the netif
+ * configuration, starts an ARP module if needed and sets the netif routing
+ * table.
+ * 
+ * The device identifier and the nil service has to be set.
+ *
+ * @param[in,out] ip_netif Network interface specific data.
+ * @returns             EOK on success.
+ * @returns             ENOTSUP if DHCP is configured.
+ * @returns             ENOTSUP if IPv6 is configured.
+ * @returns             EINVAL if any of the addresses is invalid.
+ * @returns             EINVAL if the used ARP module is not known.
+ * @returns             ENOMEM if there is not enough memory left.
+ * @returns             Other error codes as defined for the
+ *                      net_get_device_conf_req() function.
+ * @returns             Other error codes as defined for the bind_service()
+ *                      function.
+ * @returns             Other error codes as defined for the specific
+ *                      arp_device_req() function.
+ * @returns             Other error codes as defined for the
+ *                      nil_packet_size_req() function.
+ */
+static int ip_netif_initialize(ip_netif_ref ip_netif)
+{
         ERROR_DECLARE;
 
-        ip_netif_ref ip_netif;
-        ip_route_ref route;
-        int index;
-
-        ip_netif = (ip_netif_ref) malloc(sizeof(ip_netif_t));
-        if(! ip_netif){
-                return ENOMEM;
-        }
-        if(ERROR_OCCURRED(ip_routes_initialize(&ip_netif->routes))){
-                free(ip_netif);
-                return ERROR_CODE;
-        }
-        ip_netif->device_id = device_id;
-        ip_netif->service = netif;
-        ip_netif->state = NETIF_STOPPED;
-        fibril_rwlock_write_lock(&ip_globals.netifs_lock);
-        if(ERROR_OCCURRED(ip_netif_initialize(ip_netif))){
-                fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
-                ip_routes_destroy(&ip_netif->routes);
-                free(ip_netif);
-                return ERROR_CODE;
-        }
-        if(ip_netif->arp){
-                ++ ip_netif->arp->usage;
-        }
-        // print the settings
-        printf("%s: Device registered (id: %d, phone: %d, ipv: %d, conf: %s)\n",
-            NAME, ip_netif->device_id, ip_netif->phone, ip_netif->ipv,
-            ip_netif->dhcp ? "dhcp" : "static");
-        
-        // TODO ipv6 addresses
-        
-        char address[INET_ADDRSTRLEN];
-        char netmask[INET_ADDRSTRLEN];
-        char gateway[INET_ADDRSTRLEN];
-        
-        for (index = 0; index < ip_routes_count(&ip_netif->routes); ++ index){
-                route = ip_routes_get_index(&ip_netif->routes, index);
-                if (route) {
-                        inet_ntop(AF_INET, (uint8_t *) &route->address.s_addr, address, INET_ADDRSTRLEN);
-                        inet_ntop(AF_INET, (uint8_t *) &route->netmask.s_addr, netmask, INET_ADDRSTRLEN);
-                        inet_ntop(AF_INET, (uint8_t *) &route->gateway.s_addr, gateway, INET_ADDRSTRLEN);
-                        printf("%s: Route %d (address: %s, netmask: %s, gateway: %s)\n",
-                            NAME, index, address, netmask, gateway);
-                }
-        }
-        
-        inet_ntop(AF_INET, (uint8_t *) &ip_netif->broadcast.s_addr, address, INET_ADDRSTRLEN);
-        printf("%s: Broadcast (%s)\n", NAME, address);
-        
-        fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
-        return EOK;
-}
-
-int ip_netif_initialize(ip_netif_ref ip_netif){
-        ERROR_DECLARE;
-
-        measured_string_t names[] = {{str_dup("IPV"), 3}, {str_dup("IP_CONFIG"), 9}, {str_dup("IP_ADDR"), 7}, {str_dup("IP_NETMASK"), 10}, {str_dup("IP_GATEWAY"), 10}, {str_dup("IP_BROADCAST"), 12}, {str_dup("ARP"), 3}, {str_dup("IP_ROUTING"), 10}};
+        measured_string_t names[] = {
+                {
+                        (char *) "IPV",
+                        3
+                },
+                {
+                        (char *) "IP_CONFIG",
+                        9
+                },
+                {
+                        (char *) "IP_ADDR",
+                        7
+                },
+                {
+                        (char *) "IP_NETMASK",
+                        10
+                },
+                {
+                        (char *) "IP_GATEWAY",
+                        10
+                },
+                {
+                        (char *) "IP_BROADCAST",
+                        12
+                },
+                {
+                        (char *) "ARP",
+                        3
+                },
+                {
+                        (char *) "IP_ROUTING",
+                        10
+                }
+        };
         measured_string_ref configuration;
         size_t count = sizeof(names) / sizeof(measured_string_t);
-        char * data;
+        char *data;
         measured_string_t address;
         int index;
@@ -503 +352 @@
         ip_netif->routing = NET_DEFAULT_IP_ROUTING;
         configuration = &names[0];
+
         // get configuration
-        ERROR_PROPAGATE(net_get_device_conf_req(ip_globals.net_phone, ip_netif->device_id, &configuration, count, &data));
-        if(configuration){
-                if(configuration[0].value){
+        ERROR_PROPAGATE(net_get_device_conf_req(ip_globals.net_phone,
+            ip_netif->device_id, &configuration, count, &data));
+        if (configuration) {
+                if (configuration[0].value)
                         ip_netif->ipv = strtol(configuration[0].value, NULL, 0);
-                }
-                ip_netif->dhcp = ! str_lcmp(configuration[1].value, "dhcp", configuration[1].length);
-                if(ip_netif->dhcp){
+
+                ip_netif->dhcp = !str_lcmp(configuration[1].value, "dhcp",
+                    configuration[1].length);
+                
+                if (ip_netif->dhcp) {
                         // TODO dhcp
                         net_free_settings(configuration, data);
                         return ENOTSUP;
-                }else if(ip_netif->ipv == IPV4){
+                } else if (ip_netif->ipv == IPV4) {
                         route = (ip_route_ref) malloc(sizeof(ip_route_t));
-                        if(! route){
+                        if (!route) {
                                 net_free_settings(configuration, data);
                                 return ENOMEM;
@@ -525 +378 @@
                         route->netif = ip_netif;
                         index = ip_routes_add(&ip_netif->routes, route);
-                        if(index < 0){
+                        if (index < 0) {
                                 net_free_settings(configuration, data);
                                 free(route);
                                 return index;
                         }
-                        if(ERROR_OCCURRED(inet_pton(AF_INET, configuration[2].value, (uint8_t *) &route->address.s_addr))
-                                || ERROR_OCCURRED(inet_pton(AF_INET, configuration[3].value, (uint8_t *) &route->netmask.s_addr))
-                                || (inet_pton(AF_INET, configuration[4].value, (uint8_t *) &gateway.s_addr) == EINVAL)
-                                || (inet_pton(AF_INET, configuration[5].value, (uint8_t *) &ip_netif->broadcast.s_addr) == EINVAL)){
+                        if (ERROR_OCCURRED(inet_pton(AF_INET,
+                            configuration[2].value,
+                            (uint8_t *) &route->address.s_addr)) ||
+                            ERROR_OCCURRED(inet_pton(AF_INET,
+                            configuration[3].value,
+                            (uint8_t *) &route->netmask.s_addr)) ||
+                            (inet_pton(AF_INET, configuration[4].value,
+                            (uint8_t *) &gateway.s_addr) == EINVAL) ||
+                            (inet_pton(AF_INET, configuration[5].value,
+                            (uint8_t *) &ip_netif->broadcast.s_addr) == EINVAL))
+                            {
                                 net_free_settings(configuration, data);
                                 return EINVAL;
                         }
-                }else{
+                } else {
                         // TODO ipv6 in separate module
                         net_free_settings(configuration, data);
                         return ENOTSUP;
                 }
-                if(configuration[6].value){
-                        ip_netif->arp = get_running_module(&ip_globals.modules, configuration[6].value);
-                        if(! ip_netif->arp){
-                                printf("Failed to start the arp %s\n", configuration[6].value);
+
+                if (configuration[6].value) {
+                        ip_netif->arp = get_running_module(&ip_globals.modules,
+                            configuration[6].value);
+                        if (!ip_netif->arp) {
+                                printf("Failed to start the arp %s\n",
+                                    configuration[6].value);
                                 net_free_settings(configuration, data);
                                 return EINVAL;
                         }
                 }
-                if(configuration[7].value){
+                if (configuration[7].value)
                         ip_netif->routing = (configuration[7].value[0] == 'y');
-                }
+
                 net_free_settings(configuration, data);
         }
+
         // binds the netif service which also initializes the device
-        ip_netif->phone = nil_bind_service(ip_netif->service, (ipcarg_t) ip_netif->device_id, SERVICE_IP, ip_globals.client_connection);
-        if(ip_netif->phone < 0){
-                printf("Failed to contact the nil service %d\n", ip_netif->service);
+        ip_netif->phone = nil_bind_service(ip_netif->service,
+            (ipcarg_t) ip_netif->device_id, SERVICE_IP,
+            ip_globals.client_connection);
+        if (ip_netif->phone < 0) {
+                printf("Failed to contact the nil service %d\n",
+                    ip_netif->service);
                 return ip_netif->phone;
         }
+
         // has to be after the device netif module initialization
-        if(ip_netif->arp){
-                if(route){
+        if (ip_netif->arp) {
+                if (route) {
                         address.value = (char *) &route->address.s_addr;
                         address.length = CONVERT_SIZE(in_addr_t, char, 1);
-                        ERROR_PROPAGATE(arp_device_req(ip_netif->arp->phone, ip_netif->device_id, SERVICE_IP, ip_netif->service, &address));
-                }else{
+                        ERROR_PROPAGATE(arp_device_req(ip_netif->arp->phone,
+                            ip_netif->device_id, SERVICE_IP, ip_netif->service,
+                            &address));
+                } else {
                         ip_netif->arp = 0;
                 }
         }
+
         // get packet dimensions
-        ERROR_PROPAGATE(nil_packet_size_req(ip_netif->phone, ip_netif->device_id, &ip_netif->packet_dimension));
-        if(ip_netif->packet_dimension.content < IP_MIN_CONTENT){
-                printf("Maximum transmission unit %d bytes is too small, at least %d bytes are needed\n", ip_netif->packet_dimension.content, IP_MIN_CONTENT);
+        ERROR_PROPAGATE(nil_packet_size_req(ip_netif->phone,
+            ip_netif->device_id, &ip_netif->packet_dimension));
+        if (ip_netif->packet_dimension.content < IP_MIN_CONTENT) {
+                printf("Maximum transmission unit %d bytes is too small, at "
+                    "least %d bytes are needed\n",
+                    ip_netif->packet_dimension.content, IP_MIN_CONTENT);
                 ip_netif->packet_dimension.content = IP_MIN_CONTENT;
         }
+
         index = ip_netifs_add(&ip_globals.netifs, ip_netif->device_id, ip_netif);
-        if(index < 0){
+        if (index < 0)
                 return index;
-        }
-        if(gateway.s_addr){
+        
+        if (gateway.s_addr) {
                 // the default gateway
                 ip_globals.gateway.address.s_addr = 0;
@@ -588 +463 @@
                 ip_globals.gateway.netif = ip_netif;
         }
+
         return EOK;
 }
 
-int ip_mtu_changed_message(device_id_t device_id, size_t mtu){
+/** Updates the device content length according to the new MTU value.
+ *
+ * @param[in] device_id The device identifier.
+ * @param[in] mtu       The new mtu value.
+ * @returns             EOK on success.
+ * @returns             ENOENT if device is not found.
+ */
+static int ip_mtu_changed_message(device_id_t device_id, size_t mtu)
+{
         ip_netif_ref netif;
 
         fibril_rwlock_write_lock(&ip_globals.netifs_lock);
         netif = ip_netifs_find(&ip_globals.netifs, device_id);
-        if(! netif){
+        if (!netif) {
                 fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
                 return ENOENT;
         }
         netif->packet_dimension.content = mtu;
+        fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
+
         printf("%s: Device %d changed MTU to %d\n", NAME, device_id, mtu);
-        fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
+
         return EOK;
 }
 
-int ip_device_state_message(device_id_t device_id, device_state_t state){
+/** Updates the device state.
+ *
+ * @param[in] device_id The device identifier.
+ * @param[in] state     The new state value.
+ * @returns             EOK on success.
+ * @returns             ENOENT if device is not found.
+ */
+static int ip_device_state_message(device_id_t device_id, device_state_t state)
+{
         ip_netif_ref netif;
 
@@ -612 +506 @@
         // find the device
         netif = ip_netifs_find(&ip_globals.netifs, device_id);
-        if(! netif){
+        if (!netif) {
                 fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
                 return ENOENT;
         }
         netif->state = state;
+        fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
+
         printf("%s: Device %d changed state to %d\n", NAME, device_id, state);
-        fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
+
         return EOK;
 }
 
-int ip_register(int protocol, services_t service, int phone, tl_received_msg_t received_msg){
-        ip_proto_ref proto;
-        int index;
-
-        if(!(protocol && service && ((phone > 0) || (received_msg)))){
-                return EINVAL;
-        }
-        proto = (ip_proto_ref) malloc(sizeof(ip_protos_t));
-        if(! proto){
-                return ENOMEM;
-        }
-        proto->protocol = protocol;
-        proto->service = service;
-        proto->phone = phone;
-        proto->received_msg = received_msg;
-        fibril_rwlock_write_lock(&ip_globals.protos_lock);
-        index = ip_protos_add(&ip_globals.protos, proto->protocol, proto);
-        if(index < 0){
-                fibril_rwlock_write_unlock(&ip_globals.protos_lock);
-                free(proto);
-                return index;
-        }
-        
-        printf("%s: Protocol registered (protocol: %d, phone: %d)\n",
-            NAME, proto->protocol, proto->phone);
-        
-        fibril_rwlock_write_unlock(&ip_globals.protos_lock);
-        return EOK;
-}
-
-int ip_send_msg_local(int il_phone, device_id_t device_id, packet_t packet, services_t sender, services_t error){
-        ERROR_DECLARE;
-
-        int addrlen;
-        ip_netif_ref netif;
-        ip_route_ref route;
-        struct sockaddr * addr;
-        struct sockaddr_in * address_in;
-//      struct sockaddr_in6 *   address_in6;
-        in_addr_t * dest;
-        in_addr_t * src;
-        int phone;
-
-        // addresses in the host byte order
-        // should be the next hop address or the target destination address
-        addrlen = packet_get_addr(packet, NULL, (uint8_t **) &addr);
-        if(addrlen < 0){
-                return ip_release_and_return(packet, addrlen);
-        }
-        if((size_t) addrlen < sizeof(struct sockaddr)){
-                return ip_release_and_return(packet, EINVAL);
-        }
-        switch(addr->sa_family){
-                case AF_INET:
-                        if(addrlen != sizeof(struct sockaddr_in)){
-                                return ip_release_and_return(packet, EINVAL);
+
+/** Prefixes a middle fragment header based on the last fragment header to the
+ * packet.
+ *
+ * @param[in] packet    The packet to be prefixed.
+ * @param[in] last      The last header to be copied.
+ * @returns             The prefixed middle header.
+ * @returns             NULL on error.
+ */
+static ip_header_ref
+ip_create_middle_header(packet_t packet, ip_header_ref last)
+{
+        ip_header_ref middle;
+
+        middle = (ip_header_ref) packet_suffix(packet, IP_HEADER_LENGTH(last));
+        if (!middle)
+                return NULL;
+        memcpy(middle, last, IP_HEADER_LENGTH(last));
+        middle->flags |= IPFLAG_MORE_FRAGMENTS;
+        return middle;
+}
+
+/** Copies the fragment header.
+ *
+ * Copies only the header itself and relevant IP options.
+ *
+ * @param[out] last     The created header.
+ * @param[in] first     The original header to be copied.
+ */
+static void ip_create_last_header(ip_header_ref last, ip_header_ref first)
+{
+        ip_option_ref option;
+        size_t next;
+        size_t length;
+
+        // copy first itself
+        memcpy(last, first, sizeof(ip_header_t));
+        length = sizeof(ip_header_t);
+        next = sizeof(ip_header_t);
+
+        // process all ip options
+        while (next < first->header_length) {
+                option = (ip_option_ref) (((uint8_t *) first) + next);
+                // skip end or noop
+                if ((option->type == IPOPT_END) ||
+                    (option->type == IPOPT_NOOP)) {
+                        next++;
+                } else {
+                        // copy if told so or skip
+                        if (IPOPT_COPIED(option->type)) {
+                                memcpy(((uint8_t *) last) + length,
+                                    ((uint8_t *) first) + next, option->length);
+                                length += option->length;
                         }
-                        address_in = (struct sockaddr_in *) addr;
-                        dest = &address_in->sin_addr;
-                        if(! dest->s_addr){
-                                dest->s_addr = IPV4_LOCALHOST_ADDRESS;
-                        }
-                        break;
-                // TODO IPv6
-/*              case AF_INET6:
-                        if(addrlen != sizeof(struct sockaddr_in6)){
-                                return EINVAL;
-                        }
-                        address_in6 = (struct sockaddr_in6 *) dest;
-                        address_in6.sin6_addr.s6_addr;
-                        IPV6_LOCALHOST_ADDRESS;
-*/              default:
-                        return ip_release_and_return(packet, EAFNOSUPPORT);
-        }
-        netif = NULL;
-        route = NULL;
-        fibril_rwlock_read_lock(&ip_globals.netifs_lock);
-        // device specified?
-        if(device_id > 0){
-                netif = ip_netifs_find(&ip_globals.netifs, device_id);
-                route = ip_netif_find_route(netif, * dest);
-                if(netif && (! route) && (ip_globals.gateway.netif == netif)){
-                        route = &ip_globals.gateway;
-                }
-        }
-        if(! route){
-                route = ip_find_route(*dest);
-                netif = route ? route->netif : NULL;
-        }
-        if(!(netif && route)){
-                fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
-                phone = ip_prepare_icmp_and_get_phone(error, packet, NULL);
-                if(phone >= 0){
-                        // unreachable ICMP if no routing
-                        icmp_destination_unreachable_msg(phone, ICMP_NET_UNREACH, 0, packet);
-                }
-                return ENOENT;
-        }
-        if(error){
-                // do not send for broadcast, anycast packets or network broadcast
-                if((! dest->s_addr)
-                        || (!(~ dest->s_addr))
-                        || (!(~((dest->s_addr &(~ route->netmask.s_addr)) | route->netmask.s_addr)))
-                        || (!(dest->s_addr &(~ route->netmask.s_addr)))){
-                        return ip_release_and_return(packet, EINVAL);
-                }
-        }
-        // if the local host is the destination
-        if((route->address.s_addr == dest->s_addr)
-                && (dest->s_addr != IPV4_LOCALHOST_ADDRESS)){
-                // find the loopback device to deliver
-                dest->s_addr = IPV4_LOCALHOST_ADDRESS;
-                route = ip_find_route(*dest);
-                netif = route ? route->netif : NULL;
-                if(!(netif && route)){
-                        fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
-                        phone = ip_prepare_icmp_and_get_phone(error, packet, NULL);
-                        if(phone >= 0){
-                                // unreachable ICMP if no routing
-                                icmp_destination_unreachable_msg(phone, ICMP_HOST_UNREACH, 0, packet);
-                        }
-                        return ENOENT;
-                }
-        }
-        src = ip_netif_address(netif);
-        if(! src){
-                fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
-                return ip_release_and_return(packet, ENOENT);
-        }
-        ERROR_CODE = ip_send_route(packet, netif, route, src, * dest, error);
-        fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
-        return ERROR_CODE;
-}
-
-in_addr_t * ip_netif_address(ip_netif_ref netif){
-        ip_route_ref route;
-
-        route = ip_routes_get_index(&netif->routes, 0);
-        return route ? &route->address : NULL;
-}
-
-int ip_send_route(packet_t packet, ip_netif_ref netif, ip_route_ref route, in_addr_t * src, in_addr_t dest, services_t error){
-        ERROR_DECLARE;
-
-        measured_string_t destination;
-        measured_string_ref translation;
-        char * data;
-        int phone;
-
-        // get destination hardware address
-        if(netif->arp && (route->address.s_addr != dest.s_addr)){
-                destination.value = route->gateway.s_addr ? (char *) &route->gateway.s_addr : (char *) &dest.s_addr;
-                destination.length = CONVERT_SIZE(dest.s_addr, char, 1);
-                if(ERROR_OCCURRED(arp_translate_req(netif->arp->phone, netif->device_id, SERVICE_IP, &destination, &translation, &data))){
-//                      sleep(1);
-//                      ERROR_PROPAGATE(arp_translate_req(netif->arp->phone, netif->device_id, SERVICE_IP, &destination, &translation, &data));
-                        pq_release_remote(ip_globals.net_phone, packet_get_id(packet));
-                        return ERROR_CODE;
-                }
-                if(!(translation && translation->value)){
-                        if(translation){
-                                free(translation);
-                                free(data);
-                        }
-                        phone = ip_prepare_icmp_and_get_phone(error, packet, NULL);
-                        if(phone >= 0){
-                                // unreachable ICMP if no routing
-                                icmp_destination_unreachable_msg(phone, ICMP_HOST_UNREACH, 0, packet);
-                        }
-                        return EINVAL;
-                }
-        }else translation = NULL;
-        if(ERROR_OCCURRED(ip_prepare_packet(src, dest, packet, translation))){
-                pq_release_remote(ip_globals.net_phone, packet_get_id(packet));
-        }else{
-                packet = ip_split_packet(packet, netif->packet_dimension.prefix, netif->packet_dimension.content, netif->packet_dimension.suffix, netif->packet_dimension.addr_len, error);
-                if(packet){
-                        nil_send_msg(netif->phone, netif->device_id, packet, SERVICE_IP);
-                }
-        }
-        if(translation){
-                free(translation);
-                free(data);
-        }
-        return ERROR_CODE;
-}
-
-int ip_prepare_packet(in_addr_t * source, in_addr_t dest, packet_t packet, measured_string_ref destination){
+                        // next option
+                        next += option->length;
+                }
+        }
+
+        // align 4 byte boundary
+        if (length % 4) {
+                bzero(((uint8_t *) last) + length, 4 - (length % 4));
+                last->header_length = length / 4 + 1;
+        } else {
+                last->header_length = length / 4;
+        }
+
+        last->header_checksum = 0;
+}
+
+/** Prepares the outgoing packet or the packet queue.
+ *
+ * The packet queue is a fragmented packet
+ * Updates the first packet's IP header.
+ * Prefixes the additional packets with fragment headers.
+ *
+ * @param[in] source    The source address.
+ * @param[in] dest      The destination address.
+ * @param[in,out] packet The packet to be sent.
+ * @param[in] destination The destination hardware address.
+ * @returns             EOK on success.
+ * @returns             EINVAL if the packet is too small to contain the IP
+ *                      header.
+ * @returns             EINVAL if the packet is too long than the IP allows.
+ * @returns             ENOMEM if there is not enough memory left.
+ * @returns             Other error codes as defined for the packet_set_addr()
+ *                      function.
+ */
+static int
+ip_prepare_packet(in_addr_t *source, in_addr_t dest, packet_t packet,
+    measured_string_ref destination)
+{
         ERROR_DECLARE;
 
@@ -819 +619 @@
 
         length = packet_get_data_length(packet);
-        if((length < sizeof(ip_header_t)) || (length > IP_MAX_CONTENT)){
+        if ((length < sizeof(ip_header_t)) || (length > IP_MAX_CONTENT))
                 return EINVAL;
-        }
+
         header = (ip_header_ref) packet_get_data(packet);
-        if(destination){
-                ERROR_PROPAGATE(packet_set_addr(packet, NULL, (uint8_t *) destination->value, CONVERT_SIZE(char, uint8_t, destination->length)));
-        }else{
+        if (destination) {
+                ERROR_PROPAGATE(packet_set_addr(packet, NULL,
+                    (uint8_t *) destination->value,
+                    CONVERT_SIZE(char, uint8_t, destination->length)));
+        } else {
                 ERROR_PROPAGATE(packet_set_addr(packet, NULL, NULL, 0));
         }
@@ -832 +634 @@
         header->fragment_offset_low = 0;
         header->header_checksum = 0;
-        if(source){
+        if (source)
                 header->source_address = source->s_addr;
-        }
         header->destination_address = dest.s_addr;
+
         fibril_rwlock_write_lock(&ip_globals.lock);
-        ++ ip_globals.packet_counter;
+        ip_globals.packet_counter++;
         header->identification = htons(ip_globals.packet_counter);
         fibril_rwlock_write_unlock(&ip_globals.lock);
-//      length = packet_get_data_length(packet);
-        if(pq_next(packet)){
+
+        if (pq_next(packet)) {
                 last_header = (ip_header_ref) malloc(IP_HEADER_LENGTH(header));
-                if(! last_header){
+                if (!last_header)
                         return ENOMEM;
-                }
                 ip_create_last_header(last_header, header);
                 next = pq_next(packet);
-                while(pq_next(next)){
-                        middle_header = (ip_header_ref) packet_prefix(next, IP_HEADER_LENGTH(last_header));
-                        if(! middle_header){
+                while (pq_next(next)) {
+                        middle_header = (ip_header_ref) packet_prefix(next,
+                            IP_HEADER_LENGTH(last_header));
+                        if (!middle_header) {
+                                free(last_header);
                                 return ENOMEM;
                         }
-                        memcpy(middle_header, last_header, IP_HEADER_LENGTH(last_header));
+
+                        memcpy(middle_header, last_header,
+                            IP_HEADER_LENGTH(last_header));
                         header->flags |= IPFLAG_MORE_FRAGMENTS;
-                        middle_header->total_length = htons(packet_get_data_length(next));
-                        middle_header->fragment_offset_high = IP_COMPUTE_FRAGMENT_OFFSET_HIGH(length);
-                        middle_header->fragment_offset_low = IP_COMPUTE_FRAGMENT_OFFSET_LOW(length);
-                        middle_header->header_checksum = IP_HEADER_CHECKSUM(middle_header);
-                        if(destination){
-                                ERROR_PROPAGATE(packet_set_addr(next, NULL, (uint8_t *) destination->value, CONVERT_SIZE(char, uint8_t, destination->length)));
+                        middle_header->total_length =
+                            htons(packet_get_data_length(next));
+                        middle_header->fragment_offset_high =
+                            IP_COMPUTE_FRAGMENT_OFFSET_HIGH(length);
+                        middle_header->fragment_offset_low =
+                            IP_COMPUTE_FRAGMENT_OFFSET_LOW(length);
+                        middle_header->header_checksum =
+                            IP_HEADER_CHECKSUM(middle_header);
+                        if (destination) {
+                                if (ERROR_OCCURRED(packet_set_addr(next, NULL,
+                                    (uint8_t *) destination->value,
+                                    CONVERT_SIZE(char, uint8_t,
+                                    destination->length)))) {
+                                        free(last_header);
+                                        return ERROR_CODE;
+                                }
                         }
                         length += packet_get_data_length(next);
                         next = pq_next(next);
                 }
-                middle_header = (ip_header_ref) packet_prefix(next, IP_HEADER_LENGTH(last_header));
-                if(! middle_header){
+
+                middle_header = (ip_header_ref) packet_prefix(next,
+                    IP_HEADER_LENGTH(last_header));
+                if (!middle_header) {
+                        free(last_header);
                         return ENOMEM;
                 }
-                memcpy(middle_header, last_header, IP_HEADER_LENGTH(last_header));
-                middle_header->total_length = htons(packet_get_data_length(next));
-                middle_header->fragment_offset_high = IP_COMPUTE_FRAGMENT_OFFSET_HIGH(length);
-                middle_header->fragment_offset_low = IP_COMPUTE_FRAGMENT_OFFSET_LOW(length);
-                middle_header->header_checksum = IP_HEADER_CHECKSUM(middle_header);
-                if(destination){
-                        ERROR_PROPAGATE(packet_set_addr(next, NULL, (uint8_t *) destination->value, CONVERT_SIZE(char, uint8_t, destination->length)));
+
+                memcpy(middle_header, last_header,
+                    IP_HEADER_LENGTH(last_header));
+                middle_header->total_length =
+                    htons(packet_get_data_length(next));
+                middle_header->fragment_offset_high =
+                    IP_COMPUTE_FRAGMENT_OFFSET_HIGH(length);
+                middle_header->fragment_offset_low =
+                    IP_COMPUTE_FRAGMENT_OFFSET_LOW(length);
+                middle_header->header_checksum =
+                    IP_HEADER_CHECKSUM(middle_header);
+                if (destination) {
+                        if (ERROR_OCCURRED(packet_set_addr(next, NULL,
+                            (uint8_t *) destination->value,
+                            CONVERT_SIZE(char, uint8_t,
+                            destination->length)))) {
+                                free(last_header);
+                                return ERROR_CODE;
+                            }
                 }
                 length += packet_get_data_length(next);
@@ -881 +711 @@
                 header->flags |= IPFLAG_MORE_FRAGMENTS;
         }
+
         header->total_length = htons(length);
         // unnecessary for all protocols
         header->header_checksum = IP_HEADER_CHECKSUM(header);
+
         return EOK;
 }
 
-int ip_message_standalone(ipc_callid_t callid, ipc_call_t *call,
-    ipc_call_t *answer, int * answer_count)
+/** Fragments the packet from the end.
+ *
+ * @param[in] packet    The packet to be fragmented.
+ * @param[in,out] new_packet The new packet fragment.
+ * @param[in,out] header The original packet header.
+ * @param[in,out] new_header The new packet fragment header.
+ * @param[in] length    The new fragment length.
+ * @param[in] src       The source address.
+ * @param[in] dest      The destiantion address.
+ * @param[in] addrlen   The address length.
+ * @returns             EOK on success.
+ * @returns             ENOMEM if the target packet is too small.
+ * @returns             Other error codes as defined for the packet_set_addr()
+ *                      function.
+ * @returns             Other error codes as defined for the pq_insert_after()
+ *                      function.
+ */
+static int
+ip_fragment_packet_data(packet_t packet, packet_t new_packet,
+    ip_header_ref header, ip_header_ref new_header, size_t length,
+    const struct sockaddr *src, const struct sockaddr *dest, socklen_t addrlen)
+{
+        ERROR_DECLARE;
+
+        void *data;
+        size_t offset;
+
+        data = packet_suffix(new_packet, length);
+        if (!data)
+                return ENOMEM;
+
+        memcpy(data, ((void *) header) + IP_TOTAL_LENGTH(header) - length,
+            length);
+        ERROR_PROPAGATE(packet_trim(packet, 0, length));
+        header->total_length = htons(IP_TOTAL_LENGTH(header) - length);
+        new_header->total_length = htons(IP_HEADER_LENGTH(new_header) + length);
+        offset = IP_FRAGMENT_OFFSET(header) + IP_HEADER_DATA_LENGTH(header);
+        new_header->fragment_offset_high =
+            IP_COMPUTE_FRAGMENT_OFFSET_HIGH(offset);
+        new_header->fragment_offset_low =
+            IP_COMPUTE_FRAGMENT_OFFSET_LOW(offset);
+        new_header->header_checksum = IP_HEADER_CHECKSUM(new_header);
+        ERROR_PROPAGATE(packet_set_addr(new_packet, (const uint8_t *) src,
+            (const uint8_t *) dest, addrlen));
+
+        return pq_insert_after(packet, new_packet);
+}
+
+/** Checks the packet length and fragments it if needed.
+ *
+ * The new fragments are queued before the original packet.
+ *
+ * @param[in,out] packet The packet to be checked.
+ * @param[in] length    The maximum packet length.
+ * @param[in] prefix    The minimum prefix size.
+ * @param[in] suffix    The minimum suffix size.
+ * @param[in] addr_len  The minimum address length.
+ * @returns             EOK on success.
+ * @returns             EINVAL if the packet_get_addr() function fails.
+ * @returns             EINVAL if the packet does not contain the IP header.
+ * @returns             EPERM if the packet needs to be fragmented and the
+ *                      fragmentation is not allowed.
+ * @returns             ENOMEM if there is not enough memory left.
+ * @returns             ENOMEM if there is no packet available.
+ * @returns             ENOMEM if the packet is too small to contain the IP
+ *                      header.
+ * @returns             Other error codes as defined for the packet_trim()
+ *                      function.
+ * @returns             Other error codes as defined for the
+ *                      ip_create_middle_header() function.
+ * @returns             Other error codes as defined for the
+ *                      ip_fragment_packet_data() function.
+ */
+static int
+ip_fragment_packet(packet_t packet, size_t length, size_t prefix, size_t suffix,
+    socklen_t addr_len)
+{
+        ERROR_DECLARE;
+
+        packet_t new_packet;
+        ip_header_ref header;
+        ip_header_ref middle_header;
+        ip_header_ref last_header;
+        struct sockaddr *src;
+        struct sockaddr *dest;
+        socklen_t addrlen;
+        int result;
+
+        result = packet_get_addr(packet, (uint8_t **) &src, (uint8_t **) &dest);
+        if (result <= 0)
+                return EINVAL;
+
+        addrlen = (socklen_t) result;
+        if (packet_get_data_length(packet) <= sizeof(ip_header_t))
+                return ENOMEM;
+
+        // get header
+        header = (ip_header_ref) packet_get_data(packet);
+        if (!header)
+                return EINVAL;
+
+        // fragmentation forbidden?
+        if(header->flags & IPFLAG_DONT_FRAGMENT)
+                return EPERM;
+
+        // create the last fragment
+        new_packet = packet_get_4_remote(ip_globals.net_phone, prefix, length,
+            suffix, ((addrlen > addr_len) ? addrlen : addr_len));
+        if (!new_packet)
+                return ENOMEM;
+
+        // allocate as much as originally
+        last_header = (ip_header_ref) packet_suffix(new_packet,
+            IP_HEADER_LENGTH(header));
+        if (!last_header)
+                return ip_release_and_return(packet, ENOMEM);
+
+        ip_create_last_header(last_header, header);
+
+        // trim the unused space
+        if (ERROR_OCCURRED(packet_trim(new_packet, 0,
+            IP_HEADER_LENGTH(header) - IP_HEADER_LENGTH(last_header)))) {
+                return ip_release_and_return(packet, ERROR_CODE);
+        }
+
+        // biggest multiple of 8 lower than content
+        // TODO even fragmentation?
+        length = length & ~0x7;
+        if (ERROR_OCCURRED(ip_fragment_packet_data(packet, new_packet, header,
+            last_header,
+            ((IP_HEADER_DATA_LENGTH(header) -
+            ((length - IP_HEADER_LENGTH(header)) & ~0x7)) %
+            ((length - IP_HEADER_LENGTH(last_header)) & ~0x7)), src, dest,
+            addrlen))) {
+                return ip_release_and_return(packet, ERROR_CODE);
+        }
+
+        // mark the first as fragmented
+        header->flags |= IPFLAG_MORE_FRAGMENTS;
+
+        // create middle framgents
+        while (IP_TOTAL_LENGTH(header) > length) {
+                new_packet = packet_get_4_remote(ip_globals.net_phone, prefix,
+                    length, suffix,
+                    ((addrlen >= addr_len) ? addrlen : addr_len));
+                if (!new_packet)
+                        return ENOMEM;
+
+                middle_header = ip_create_middle_header(new_packet,
+                    last_header);
+                if (!middle_header)
+                        return ip_release_and_return(packet, ENOMEM);
+
+                if (ERROR_OCCURRED(ip_fragment_packet_data(packet, new_packet,
+                    header, middle_header,
+                    (length - IP_HEADER_LENGTH(middle_header)) & ~0x7, src,
+                    dest, addrlen))) {
+                        return ip_release_and_return(packet, ERROR_CODE);
+                }
+        }
+
+        // finish the first fragment
+        header->header_checksum = IP_HEADER_CHECKSUM(header);
+
+        return EOK;
+}
+
+/** Checks the packet queue lengths and fragments the packets if needed.
+ *
+ * The ICMP_FRAG_NEEDED error notification may be sent if the packet needs to
+ * be fragmented and the fragmentation is not allowed.
+ *
+ * @param[in,out] packet The packet or the packet queue to be checked.
+ * @param[in] prefix    The minimum prefix size.
+ * @param[in] content   The maximum content size.
+ * @param[in] suffix    The minimum suffix size.
+ * @param[in] addr_len  The minimum address length.
+ * @param[in] error     The error module service.
+ * @returns             The packet or the packet queue of the allowed length.
+ * @returns             NULL if there are no packets left.
+ */
+static packet_t
+ip_split_packet(packet_t packet, size_t prefix, size_t content, size_t suffix,
+    socklen_t addr_len, services_t error)
+{
+        size_t length;
+        packet_t next;
+        packet_t new_packet;
+        int result;
+        int phone;
+
+        next = packet;
+        // check all packets
+        while (next) {
+                length = packet_get_data_length(next);
+                
+                if (length <= content) {
+                        next = pq_next(next);
+                        continue;
+                }
+
+                // too long
+                result = ip_fragment_packet(next, content, prefix,
+                    suffix, addr_len);
+                if (result != EOK) {
+                        new_packet = pq_detach(next);
+                        if (next == packet) {
+                                // the new first packet of the queue
+                                packet = new_packet;
+                        }
+                        // fragmentation needed?
+                        if (result == EPERM) {
+                                phone = ip_prepare_icmp_and_get_phone(
+                                    error, next, NULL);
+                                if (phone >= 0) {
+                                        // fragmentation necessary ICMP
+                                        icmp_destination_unreachable_msg(phone,
+                                            ICMP_FRAG_NEEDED, content, next);
+                                }
+                        } else {
+                                pq_release_remote(ip_globals.net_phone,
+                                    packet_get_id(next));
+                        }
+
+                        next = new_packet;
+                        continue;
+                }
+
+                next = pq_next(next);
+        }
+
+        return packet;
+}
+
+/** Sends the packet or the packet queue via the specified route.
+ *
+ * The ICMP_HOST_UNREACH error notification may be sent if route hardware
+ * destination address is found.
+ *
+ * @param[in,out] packet The packet to be sent.
+ * @param[in] netif     The target network interface.
+ * @param[in] route     The target route.
+ * @param[in] src       The source address.
+ * @param[in] dest      The destination address.
+ * @param[in] error     The error module service.
+ * @returns             EOK on success.
+ * @returns             Other error codes as defined for the arp_translate_req()
+ *                      function.
+ * @returns             Other error codes as defined for the ip_prepare_packet()
+ *                      function.
+ */
+static int
+ip_send_route(packet_t packet, ip_netif_ref netif, ip_route_ref route,
+    in_addr_t *src, in_addr_t dest, services_t error)
+{
+        ERROR_DECLARE;
+
+        measured_string_t destination;
+        measured_string_ref translation;
+        char *data;
+        int phone;
+
+        // get destination hardware address
+        if (netif->arp && (route->address.s_addr != dest.s_addr)) {
+                destination.value = route->gateway.s_addr ?
+                    (char *) &route->gateway.s_addr : (char *) &dest.s_addr;
+                destination.length = CONVERT_SIZE(dest.s_addr, char, 1);
+
+                if (ERROR_OCCURRED(arp_translate_req(netif->arp->phone,
+                    netif->device_id, SERVICE_IP, &destination, &translation,
+                    &data))) {
+                        pq_release_remote(ip_globals.net_phone,
+                            packet_get_id(packet));
+                        return ERROR_CODE;
+                }
+
+                if (!translation || !translation->value) {
+                        if (translation) {
+                                free(translation);
+                                free(data);
+                        }
+                        phone = ip_prepare_icmp_and_get_phone(error, packet,
+                            NULL);
+                        if (phone >= 0) {
+                                // unreachable ICMP if no routing
+                                icmp_destination_unreachable_msg(phone,
+                                    ICMP_HOST_UNREACH, 0, packet);
+                        }
+                        return EINVAL;
+                }
+
+        } else {
+                translation = NULL;
+        }
+
+        if (ERROR_OCCURRED(ip_prepare_packet(src, dest, packet, translation))) {
+                pq_release_remote(ip_globals.net_phone, packet_get_id(packet));
+        } else {
+                packet = ip_split_packet(packet, netif->packet_dimension.prefix,
+                    netif->packet_dimension.content,
+                    netif->packet_dimension.suffix,
+                    netif->packet_dimension.addr_len, error);
+                if (packet) {
+                        nil_send_msg(netif->phone, netif->device_id, packet,
+                            SERVICE_IP);
+                }
+        }
+
+        if (translation) {
+                free(translation);
+                free(data);
+        }
+
+        return ERROR_CODE;
+}
+
+/** Searches the network interfaces if there is a suitable route.
+ *
+ * @param[in] netif     The network interface to be searched for routes. May be
+ *                      NULL.
+ * @param[in] destination The destination address.
+ * @returns             The found route.
+ * @returns             NULL if no route was found.
+ */
+static ip_route_ref
+ip_netif_find_route(ip_netif_ref netif, in_addr_t destination)
+{
+        int index;
+        ip_route_ref route;
+
+        if (!netif)
+                return NULL;
+
+        // start with the first one - the direct route
+        for (index = 0; index < ip_routes_count(&netif->routes); index++) {
+                route = ip_routes_get_index(&netif->routes, index);
+                if (route &&
+                    ((route->address.s_addr & route->netmask.s_addr) ==
+                    (destination.s_addr & route->netmask.s_addr))) {
+                        return route;
+                }
+        }
+
+        return NULL;
+}
+
+/** Searches all network interfaces if there is a suitable route.
+ *
+ * @param[in] destination The destination address.
+ * @returns             The found route.
+ * @returns             NULL if no route was found.
+ */
+static ip_route_ref ip_find_route(in_addr_t destination) {
+        int index;
+        ip_route_ref route;
+        ip_netif_ref netif;
+
+        // start with the last netif - the newest one
+        index = ip_netifs_count(&ip_globals.netifs) - 1;
+        while (index >= 0) {
+                netif = ip_netifs_get_index(&ip_globals.netifs, index);
+                if (netif && (netif->state == NETIF_ACTIVE)) {
+                        route = ip_netif_find_route(netif, destination);
+                        if (route)
+                                return route;
+                }
+                index--;
+        }
+
+        return &ip_globals.gateway;
+}
+
+/** Returns the network interface's IP address.
+ *
+ * @param[in] netif     The network interface.
+ * @returns             The IP address.
+ * @returns             NULL if no IP address was found.
+ */
+static in_addr_t *ip_netif_address(ip_netif_ref netif)
+{
+        ip_route_ref route;
+
+        route = ip_routes_get_index(&netif->routes, 0);
+        return route ? &route->address : NULL;
+}
+
+/** Registers the transport layer protocol.
+ *
+ * The traffic of this protocol will be supplied using either the receive
+ * function or IPC message.
+ *
+ * @param[in] protocol  The transport layer module protocol.
+ * @param[in] service   The transport layer module service.
+ * @param[in] phone     The transport layer module phone.
+ * @param[in] received_msg The receiving function.
+ * @returns             EOK on success.
+ * @returns             EINVAL if the protocol parameter and/or the service
+ *                      parameter is zero.
+ * @returns             EINVAL if the phone parameter is not a positive number
+ *                      and the tl_receive_msg is NULL.
+ * @returns             ENOMEM if there is not enough memory left.
+ */
+static int
+ip_register(int protocol, services_t service, int phone,
+    tl_received_msg_t received_msg)
+{
+        ip_proto_ref proto;
+        int index;
+
+        if (!protocol || !service || ((phone < 0) && !received_msg))
+                return EINVAL;
+
+        proto = (ip_proto_ref) malloc(sizeof(ip_protos_t));
+        if (!proto)
+                return ENOMEM;
+
+        proto->protocol = protocol;
+        proto->service = service;
+        proto->phone = phone;
+        proto->received_msg = received_msg;
+
+        fibril_rwlock_write_lock(&ip_globals.protos_lock);
+        index = ip_protos_add(&ip_globals.protos, proto->protocol, proto);
+        if (index < 0) {
+                fibril_rwlock_write_unlock(&ip_globals.protos_lock);
+                free(proto);
+                return index;
+        }
+        fibril_rwlock_write_unlock(&ip_globals.protos_lock);
+
+        printf("%s: Protocol registered (protocol: %d, phone: %d)\n",
+            NAME, proto->protocol, proto->phone);
+
+        return EOK;
+}
+
+static int
+ip_device_req_local(int il_phone, device_id_t device_id, services_t netif)
+{
+        ERROR_DECLARE;
+
+        ip_netif_ref ip_netif;
+        ip_route_ref route;
+        int index;
+
+        ip_netif = (ip_netif_ref) malloc(sizeof(ip_netif_t));
+        if (!ip_netif)
+                return ENOMEM;
+
+        if (ERROR_OCCURRED(ip_routes_initialize(&ip_netif->routes))) {
+                free(ip_netif);
+                return ERROR_CODE;
+        }
+
+        ip_netif->device_id = device_id;
+        ip_netif->service = netif;
+        ip_netif->state = NETIF_STOPPED;
+
+        fibril_rwlock_write_lock(&ip_globals.netifs_lock);
+        if (ERROR_OCCURRED(ip_netif_initialize(ip_netif))) {
+                fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
+                ip_routes_destroy(&ip_netif->routes);
+                free(ip_netif);
+                return ERROR_CODE;
+        }
+        if (ip_netif->arp)
+                ip_netif->arp->usage++;
+
+        // print the settings
+        printf("%s: Device registered (id: %d, phone: %d, ipv: %d, conf: %s)\n",
+            NAME, ip_netif->device_id, ip_netif->phone, ip_netif->ipv,
+            ip_netif->dhcp ? "dhcp" : "static");
+        
+        // TODO ipv6 addresses
+        
+        char address[INET_ADDRSTRLEN];
+        char netmask[INET_ADDRSTRLEN];
+        char gateway[INET_ADDRSTRLEN];
+        
+        for (index = 0; index < ip_routes_count(&ip_netif->routes); index++) {
+                route = ip_routes_get_index(&ip_netif->routes, index);
+                if (route) {
+                        inet_ntop(AF_INET, (uint8_t *) &route->address.s_addr,
+                            address, INET_ADDRSTRLEN);
+                        inet_ntop(AF_INET, (uint8_t *) &route->netmask.s_addr,
+                            netmask, INET_ADDRSTRLEN);
+                        inet_ntop(AF_INET, (uint8_t *) &route->gateway.s_addr,
+                            gateway, INET_ADDRSTRLEN);
+                        printf("%s: Route %d (address: %s, netmask: %s, "
+                            "gateway: %s)\n", NAME, index, address, netmask,
+                            gateway);
+                }
+        }
+        
+        inet_ntop(AF_INET, (uint8_t *) &ip_netif->broadcast.s_addr, address,
+            INET_ADDRSTRLEN);
+        fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
+
+        printf("%s: Broadcast (%s)\n", NAME, address);
+
+        return EOK;
+}
+
+static int
+ip_send_msg_local(int il_phone, device_id_t device_id, packet_t packet,
+    services_t sender, services_t error)
+{
+        ERROR_DECLARE;
+
+        int addrlen;
+        ip_netif_ref netif;
+        ip_route_ref route;
+        struct sockaddr *addr;
+        struct sockaddr_in *address_in;
+        in_addr_t *dest;
+        in_addr_t *src;
+        int phone;
+
+        // addresses in the host byte order
+        // should be the next hop address or the target destination address
+        addrlen = packet_get_addr(packet, NULL, (uint8_t **) &addr);
+        if (addrlen < 0)
+                return ip_release_and_return(packet, addrlen);
+        if ((size_t) addrlen < sizeof(struct sockaddr))
+                return ip_release_and_return(packet, EINVAL);
+
+        switch (addr->sa_family) {
+        case AF_INET:
+                if (addrlen != sizeof(struct sockaddr_in))
+                        return ip_release_and_return(packet, EINVAL);
+                address_in = (struct sockaddr_in *) addr;
+                dest = &address_in->sin_addr;
+                if (!dest->s_addr)
+                        dest->s_addr = IPV4_LOCALHOST_ADDRESS;
+                break;
+        case AF_INET6:
+        default:
+                return ip_release_and_return(packet, EAFNOSUPPORT);
+        }
+
+        netif = NULL;
+        route = NULL;
+        fibril_rwlock_read_lock(&ip_globals.netifs_lock);
+
+        // device specified?
+        if (device_id > 0) {
+                netif = ip_netifs_find(&ip_globals.netifs, device_id);
+                route = ip_netif_find_route(netif, * dest);
+                if (netif && !route && (ip_globals.gateway.netif == netif))
+                        route = &ip_globals.gateway;
+        }
+
+        if (!route) {
+                route = ip_find_route(*dest);
+                netif = route ? route->netif : NULL;
+        }
+        if (!netif || !route) {
+                fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
+                phone = ip_prepare_icmp_and_get_phone(error, packet, NULL);
+                if (phone >= 0) {
+                        // unreachable ICMP if no routing
+                        icmp_destination_unreachable_msg(phone,
+                            ICMP_NET_UNREACH, 0, packet);
+                }
+                return ENOENT;
+        }
+
+        if (error) {
+                // do not send for broadcast, anycast packets or network
+                // broadcast
+                if (!dest->s_addr || !(~dest->s_addr) ||
+                    !(~((dest->s_addr & ~route->netmask.s_addr) |
+                    route->netmask.s_addr)) ||
+                    (!(dest->s_addr & ~route->netmask.s_addr))) {
+                        return ip_release_and_return(packet, EINVAL);
+                }
+        }
+
+        // if the local host is the destination
+        if ((route->address.s_addr == dest->s_addr) &&
+            (dest->s_addr != IPV4_LOCALHOST_ADDRESS)) {
+                // find the loopback device to deliver
+                dest->s_addr = IPV4_LOCALHOST_ADDRESS;
+                route = ip_find_route(*dest);
+                netif = route ? route->netif : NULL;
+                if (!netif || !route) {
+                        fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
+                        phone = ip_prepare_icmp_and_get_phone(error, packet,
+                            NULL);
+                        if (phone >= 0) {
+                                // unreachable ICMP if no routing
+                                icmp_destination_unreachable_msg(phone,
+                                    ICMP_HOST_UNREACH, 0, packet);
+                        }
+                        return ENOENT;
+                }
+        }
+        
+        src = ip_netif_address(netif);
+        if (!src) {
+                fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
+                return ip_release_and_return(packet, ENOENT);
+        }
+
+        ERROR_CODE = ip_send_route(packet, netif, route, src, *dest, error);
+        fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
+
+        return ERROR_CODE;
+}
+
+/** Returns the device packet dimensions for sending.
+ *
+ * @param[in] phone     The service module phone.
+ * @param[in] message   The service specific message.
+ * @param[in] device_id The device identifier.
+ * @param[out] addr_len The minimum reserved address length.
+ * @param[out] prefix   The minimum reserved prefix size.
+ * @param[out] content  The maximum content size.
+ * @param[out] suffix   The minimum reserved suffix size.
+ * @returns             EOK on success.
+ */
+static int
+ip_packet_size_message(device_id_t device_id, size_t *addr_len, size_t *prefix,
+    size_t *content, size_t *suffix)
+{
+        ip_netif_ref netif;
+        int index;
+
+        if (!addr_len || !prefix || !content || !suffix)
+                return EBADMEM;
+
+        *content = IP_MAX_CONTENT - IP_PREFIX;
+        fibril_rwlock_read_lock(&ip_globals.netifs_lock);
+        if (device_id < 0) {
+                *addr_len = IP_ADDR;
+                *prefix = 0;
+                *suffix = 0;
+
+                for (index = ip_netifs_count(&ip_globals.netifs) - 1;
+                    index >= 0; index--) {
+                        netif = ip_netifs_get_index(&ip_globals.netifs, index);
+                        if (!netif)
+                                continue;
+                        
+                        if (netif->packet_dimension.addr_len > *addr_len)
+                                *addr_len = netif->packet_dimension.addr_len;
+                        
+                        if (netif->packet_dimension.prefix > *prefix)
+                                *prefix = netif->packet_dimension.prefix;
+                                
+                        if (netif->packet_dimension.suffix > *suffix)
+                                *suffix = netif->packet_dimension.suffix;
+                }
+
+                *prefix = *prefix + IP_PREFIX;
+                *suffix = *suffix + IP_SUFFIX;
+        } else {
+                netif = ip_netifs_find(&ip_globals.netifs, device_id);
+                if (!netif) {
+                        fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
+                        return ENOENT;
+                }
+
+                *addr_len = (netif->packet_dimension.addr_len > IP_ADDR) ?
+                    netif->packet_dimension.addr_len : IP_ADDR;
+                *prefix = netif->packet_dimension.prefix + IP_PREFIX;
+                *suffix = netif->packet_dimension.suffix + IP_SUFFIX;
+        }
+        fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
+
+        return EOK;
+}
+
+/** Returns the packet destination address from the IP header.
+ *
+ * @param[in] header    The packet IP header to be read.
+ * @returns             The packet destination address.
+ */
+static in_addr_t ip_get_destination(ip_header_ref header)
+{
+        in_addr_t destination;
+
+        // TODO search set ipopt route?
+        destination.s_addr = header->destination_address;
+        return destination;
+}
+
+/** Delivers the packet to the local host.
+ *
+ * The packet is either passed to another module or released on error.
+ * The ICMP_PROT_UNREACH error notification may be sent if the protocol is not
+ * found.
+ *
+ * @param[in] device_id The source device identifier.
+ * @param[in] packet    The packet to be delivered.
+ * @param[in] header    The first packet IP header. May be NULL.
+ * @param[in] error     The packet error service.
+ * @returns             EOK on success.
+ * @returns             ENOTSUP if the packet is a fragment.
+ * @returns             EAFNOSUPPORT if the address family is not supported.
+ * @returns             ENOENT if the target protocol is not found.
+ * @returns             Other error codes as defined for the packet_set_addr()
+ *                      function.
+ * @returns             Other error codes as defined for the packet_trim()
+ *                      function.
+ * @returns             Other error codes as defined for the protocol specific
+ *                      tl_received_msg() function.
+ */
+static int
+ip_deliver_local(device_id_t device_id, packet_t packet, ip_header_ref header,
+    services_t error)
+{
+        ERROR_DECLARE;
+
+        ip_proto_ref proto;
+        int phone;
+        services_t service;
+        tl_received_msg_t received_msg;
+        struct sockaddr *src;
+        struct sockaddr *dest;
+        struct sockaddr_in src_in;
+        struct sockaddr_in dest_in;
+        socklen_t addrlen;
+
+        if ((header->flags & IPFLAG_MORE_FRAGMENTS) ||
+            IP_FRAGMENT_OFFSET(header)) {
+                // TODO fragmented
+                return ENOTSUP;
+        }
+        
+        switch (header->version) {
+        case IPVERSION:
+                addrlen = sizeof(src_in);
+                bzero(&src_in, addrlen);
+                src_in.sin_family = AF_INET;
+                memcpy(&dest_in, &src_in, addrlen);
+                memcpy(&src_in.sin_addr.s_addr, &header->source_address,
+                    sizeof(header->source_address));
+                memcpy(&dest_in.sin_addr.s_addr, &header->destination_address,
+                    sizeof(header->destination_address));
+                src = (struct sockaddr *) &src_in;
+                dest = (struct sockaddr *) &dest_in;
+                break;
+
+        default:
+                return ip_release_and_return(packet, EAFNOSUPPORT);
+        }
+
+        if (ERROR_OCCURRED(packet_set_addr(packet, (uint8_t *) src,
+            (uint8_t *) dest, addrlen))) {
+                return ip_release_and_return(packet, ERROR_CODE);
+        }
+
+        // trim padding if present
+        if (!error &&
+            (IP_TOTAL_LENGTH(header) < packet_get_data_length(packet))) {
+                if (ERROR_OCCURRED(packet_trim(packet, 0,
+                    packet_get_data_length(packet) - IP_TOTAL_LENGTH(header))))
+                        return ip_release_and_return(packet, ERROR_CODE);
+        }
+
+        fibril_rwlock_read_lock(&ip_globals.protos_lock);
+
+        proto = ip_protos_find(&ip_globals.protos, header->protocol);
+        if (!proto) {
+                fibril_rwlock_read_unlock(&ip_globals.protos_lock);
+                phone = ip_prepare_icmp_and_get_phone(error, packet, header);
+                if (phone >= 0) {
+                        // unreachable ICMP
+                        icmp_destination_unreachable_msg(phone,
+                            ICMP_PROT_UNREACH, 0, packet);
+                }
+                return ENOENT;
+        }
+
+        if (proto->received_msg) {
+                service = proto->service;
+                received_msg = proto->received_msg;
+                fibril_rwlock_read_unlock(&ip_globals.protos_lock);
+                ERROR_CODE = received_msg(device_id, packet, service, error);
+        } else {
+                ERROR_CODE = tl_received_msg(proto->phone, device_id, packet,
+                    proto->service, error);
+                fibril_rwlock_read_unlock(&ip_globals.protos_lock);
+        }
+
+        return ERROR_CODE;
+}
+
+/** Processes the received packet.
+ *
+ * The packet is either passed to another module or released on error.
+ *
+ * The ICMP_PARAM_POINTER error notification may be sent if the checksum is
+ * invalid.
+ * The ICMP_EXC_TTL error notification may be sent if the TTL is less than two.
+ * The ICMP_HOST_UNREACH error notification may be sent if no route was found.
+ * The ICMP_HOST_UNREACH error notification may be sent if the packet is for
+ * another host and the routing is disabled.
+ *
+ * @param[in] device_id The source device identifier.
+ * @param[in] packet    The received packet to be processed.
+ * @returns             EOK on success.
+ * @returns             EINVAL if the TTL is less than two.
+ * @returns             EINVAL if the checksum is invalid.
+ * @returns             EAFNOSUPPORT if the address family is not supported.
+ * @returns             ENOENT if no route was found.
+ * @returns             ENOENT if the packet is for another host and the routing
+ *                      is disabled.
+ */
+static int
+ip_process_packet(device_id_t device_id, packet_t packet)
+{
+        ERROR_DECLARE;
+
+        ip_header_ref header;
+        in_addr_t dest;
+        ip_route_ref route;
+        int phone;
+        struct sockaddr *addr;
+        struct sockaddr_in addr_in;
+        socklen_t addrlen;
+
+        header = (ip_header_ref) packet_get_data(packet);
+        if (!header)
+                return ip_release_and_return(packet, ENOMEM);
+
+        // checksum
+        if ((header->header_checksum) &&
+            (IP_HEADER_CHECKSUM(header) != IP_CHECKSUM_ZERO)) {
+                phone = ip_prepare_icmp_and_get_phone(0, packet, header);
+                if (phone >= 0) {
+                        // checksum error ICMP
+                        icmp_parameter_problem_msg(phone, ICMP_PARAM_POINTER,
+                            ((size_t) ((void *) &header->header_checksum)) -
+                            ((size_t) ((void *) header)), packet);
+                }
+                return EINVAL;
+        }
+
+        if (header->ttl <= 1) {
+                phone = ip_prepare_icmp_and_get_phone(0, packet, header);
+                if (phone >= 0) {
+                        // ttl exceeded ICMP
+                        icmp_time_exceeded_msg(phone, ICMP_EXC_TTL, packet);
+                }
+                return EINVAL;
+        }
+
+        // process ipopt and get destination
+        dest = ip_get_destination(header);
+
+        // set the addrination address
+        switch (header->version) {
+        case IPVERSION:
+                addrlen = sizeof(addr_in);
+                bzero(&addr_in, addrlen);
+                addr_in.sin_family = AF_INET;
+                memcpy(&addr_in.sin_addr.s_addr, &dest, sizeof(dest));
+                addr = (struct sockaddr *) &addr_in;
+                break;
+
+        default:
+                return ip_release_and_return(packet, EAFNOSUPPORT);
+        }
+
+        ERROR_PROPAGATE(packet_set_addr(packet, NULL, (uint8_t *) &addr,
+            addrlen));
+
+        route = ip_find_route(dest);
+        if (!route) {
+                phone = ip_prepare_icmp_and_get_phone(0, packet, header);
+                if (phone >= 0) {
+                        // unreachable ICMP
+                        icmp_destination_unreachable_msg(phone,
+                            ICMP_HOST_UNREACH, 0, packet);
+                }
+                return ENOENT;
+        }
+
+        if (route->address.s_addr == dest.s_addr) {
+                // local delivery
+                return ip_deliver_local(device_id, packet, header, 0);
+        }
+
+        if (route->netif->routing) {
+                header->ttl--;
+                return ip_send_route(packet, route->netif, route, NULL, dest,
+                    0);
+        }
+
+        phone = ip_prepare_icmp_and_get_phone(0, packet, header);
+        if (phone >= 0) {
+                // unreachable ICMP if no routing
+                icmp_destination_unreachable_msg(phone, ICMP_HOST_UNREACH, 0,
+                    packet);
+        }
+        
+        return ENOENT;
+}
+
+static int
+ip_add_route_req_local(int ip_phone, device_id_t device_id, in_addr_t address,
+    in_addr_t netmask, in_addr_t gateway)
+{
+        ip_route_ref route;
+        ip_netif_ref netif;
+        int index;
+
+        fibril_rwlock_write_lock(&ip_globals.netifs_lock);
+
+        netif = ip_netifs_find(&ip_globals.netifs, device_id);
+        if (!netif) {
+                fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
+                return ENOENT;
+        }
+
+        route = (ip_route_ref) malloc(sizeof(ip_route_t));
+        if (!route) {
+                fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
+                return ENOMEM;
+        }
+
+        route->address.s_addr = address.s_addr;
+        route->netmask.s_addr = netmask.s_addr;
+        route->gateway.s_addr = gateway.s_addr;
+        route->netif = netif;
+        index = ip_routes_add(&netif->routes, route);
+        if (index < 0)
+                free(route);
+
+        fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
+        
+        return index;
+}
+
+static int
+ip_set_gateway_req_local(int ip_phone, device_id_t device_id, in_addr_t gateway)
+{
+        ip_netif_ref netif;
+
+        fibril_rwlock_write_lock(&ip_globals.netifs_lock);
+
+        netif = ip_netifs_find(&ip_globals.netifs, device_id);
+        if (!netif) {
+                fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
+                return ENOENT;
+        }
+
+        ip_globals.gateway.address.s_addr = 0;
+        ip_globals.gateway.netmask.s_addr = 0;
+        ip_globals.gateway.gateway.s_addr = gateway.s_addr;
+        ip_globals.gateway.netif = netif;
+        
+        fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
+        
+        return EOK;
+}
+
+/** Notify the IP module about the received error notification packet.
+ *
+ * @param[in] ip_phone  The IP module phone used for (semi)remote calls.
+ * @param[in] device_id The device identifier.
+ * @param[in] packet    The received packet or the received packet queue.
+ * @param[in] target    The target internetwork module service to be
+ *                      delivered to.
+ * @param[in] error     The packet error reporting service. Prefixes the
+ *                      received packet.
+ * @return              EOK on success.
+ *
+ */
+static int
+ip_received_error_msg_local(int ip_phone, device_id_t device_id,
+    packet_t packet, services_t target, services_t error)
+{
+        uint8_t *data;
+        int offset;
+        icmp_type_t type;
+        icmp_code_t code;
+        ip_netif_ref netif;
+        measured_string_t address;
+        ip_route_ref route;
+        ip_header_ref header;
+
+        switch (error) {
+        case SERVICE_ICMP:
+                offset = icmp_client_process_packet(packet, &type, &code, NULL,
+                    NULL);
+                if (offset < 0)
+                        return ip_release_and_return(packet, ENOMEM);
+
+                data = packet_get_data(packet);
+                header = (ip_header_ref)(data + offset);
+
+                // destination host unreachable?
+                if ((type != ICMP_DEST_UNREACH) ||
+                    (code != ICMP_HOST_UNREACH)) {
+                        // no, something else
+                        break;
+                }
+
+                fibril_rwlock_read_lock(&ip_globals.netifs_lock);
+
+                netif = ip_netifs_find(&ip_globals.netifs, device_id);
+                if (!netif || !netif->arp) {
+                        fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
+                        break;
+                }
+
+                route = ip_routes_get_index(&netif->routes, 0);
+
+                // from the same network?
+                if (route && ((route->address.s_addr & route->netmask.s_addr) ==
+                    (header->destination_address & route->netmask.s_addr))) {
+                        // clear the ARP mapping if any
+                        address.value = (char *) &header->destination_address;
+                        address.length = CONVERT_SIZE(uint8_t, char,
+                            sizeof(header->destination_address));
+                        arp_clear_address_req(netif->arp->phone,
+                            netif->device_id, SERVICE_IP, &address);
+                }
+
+                fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
+                break;
+
+        default:
+                return ip_release_and_return(packet, ENOTSUP);
+        }
+
+        return ip_deliver_local(device_id, packet, header, error);
+}
+
+static int
+ip_get_route_req_local(int ip_phone, ip_protocol_t protocol,
+    const struct sockaddr *destination, socklen_t addrlen,
+    device_id_t *device_id, void **header, size_t *headerlen)
+{
+        struct sockaddr_in *address_in;
+        in_addr_t *dest;
+        in_addr_t *src;
+        ip_route_ref route;
+        ipv4_pseudo_header_ref header_in;
+
+        if (!destination || (addrlen <= 0))
+                return EINVAL;
+
+        if (!device_id || !header || !headerlen)
+                return EBADMEM;
+
+        if ((size_t) addrlen < sizeof(struct sockaddr))
+                return EINVAL;
+
+        switch (destination->sa_family) {
+        case AF_INET:
+                if (addrlen != sizeof(struct sockaddr_in))
+                        return EINVAL;
+                address_in = (struct sockaddr_in *) destination;
+                dest = &address_in->sin_addr;
+                if (!dest->s_addr)
+                        dest->s_addr = IPV4_LOCALHOST_ADDRESS;
+                break;
+
+        case AF_INET6:
+        default:
+                return EAFNOSUPPORT;
+        }
+
+        fibril_rwlock_read_lock(&ip_globals.lock);
+        route = ip_find_route(*dest);
+        // if the local host is the destination
+        if (route && (route->address.s_addr == dest->s_addr) &&
+            (dest->s_addr != IPV4_LOCALHOST_ADDRESS)) {
+                // find the loopback device to deliver
+                dest->s_addr = IPV4_LOCALHOST_ADDRESS;
+                route = ip_find_route(*dest);
+        }
+
+        if (!route || !route->netif) {
+                fibril_rwlock_read_unlock(&ip_globals.lock);
+                return ENOENT;
+        }
+
+        *device_id = route->netif->device_id;
+        src = ip_netif_address(route->netif);
+        fibril_rwlock_read_unlock(&ip_globals.lock);
+
+        *headerlen = sizeof(*header_in);
+        header_in = (ipv4_pseudo_header_ref) malloc(*headerlen);
+        if (!header_in)
+                return ENOMEM;
+
+        bzero(header_in, *headerlen);
+        header_in->destination_address = dest->s_addr;
+        header_in->source_address = src->s_addr;
+        header_in->protocol = protocol;
+        header_in->data_length = 0;
+        *header = header_in;
+
+        return EOK;
+}
+
+/** Processes the received IP packet or the packet queue one by one.
+ *
+ * The packet is either passed to another module or released on error.
+ *
+ * @param[in] device_id The source device identifier.
+ * @param[in,out] packet The received packet.
+ * @returns             EOK on success and the packet is no longer needed.
+ * @returns             EINVAL if the packet is too small to carry the IP
+ *                      packet.
+ * @returns             EINVAL if the received address lengths differs from the
+ *                      registered values.
+ * @returns             ENOENT if the device is not found in the cache.
+ * @returns             ENOENT if the protocol for the device is not found in
+ *                      the cache.
+ * @returns             ENOMEM if there is not enough memory left.
+ */
+static int ip_receive_message(device_id_t device_id, packet_t packet)
+{
+        packet_t next;
+
+        do {
+                next = pq_detach(packet);
+                ip_process_packet(device_id, packet);
+                packet = next;
+        } while (packet);
+
+        return EOK;
+}
+
+/** Processes the IP message.
+ *
+ * @param[in] callid    The message identifier.
+ * @param[in] call      The message parameters.
+ * @param[out] answer   The message answer parameters.
+ * @param[out] answer_count The last parameter for the actual answer in the
+ *                      answer parameter.
+ * @returns             EOK on success.
+ * @returns             ENOTSUP if the message is not known.
+ *
+ * @see ip_interface.h
+ * @see il_interface.h
+ * @see IS_NET_IP_MESSAGE()
+ */
+int
+ip_message_standalone(ipc_callid_t callid, ipc_call_t *call, ipc_call_t *answer,
+    int *answer_count)
 {
         ERROR_DECLARE;
@@ -904 +1881 @@
         *answer_count = 0;
         switch (IPC_GET_METHOD(*call)) {
-                case IPC_M_PHONE_HUNGUP:
-                        return EOK;
-                case NET_IL_DEVICE:
-                        return ip_device_req_local(0, IPC_GET_DEVICE(call),
-                            IPC_GET_SERVICE(call));
-                case IPC_M_CONNECT_TO_ME:
-                        return ip_register(IL_GET_PROTO(call), IL_GET_SERVICE(call),
-                            IPC_GET_PHONE(call), NULL);
-                case NET_IL_SEND:
-                        ERROR_PROPAGATE(packet_translate_remote(ip_globals.net_phone, &packet,
-                            IPC_GET_PACKET(call)));
-                        return ip_send_msg_local(0, IPC_GET_DEVICE(call), packet, 0,
-                            IPC_GET_ERROR(call));
-                case NET_IL_DEVICE_STATE:
-                        return ip_device_state_message(IPC_GET_DEVICE(call),
-                            IPC_GET_STATE(call));
-                case NET_IL_RECEIVED:
-                        ERROR_PROPAGATE(packet_translate_remote(ip_globals.net_phone, &packet,
-                            IPC_GET_PACKET(call)));
-                        return ip_receive_message(IPC_GET_DEVICE(call), packet);
-                case NET_IP_RECEIVED_ERROR:
-                        ERROR_PROPAGATE(packet_translate_remote(ip_globals.net_phone, &packet,
-                            IPC_GET_PACKET(call)));
-                        return ip_received_error_msg_local(0, IPC_GET_DEVICE(call), packet,
-                            IPC_GET_TARGET(call), IPC_GET_ERROR(call));
-                case NET_IP_ADD_ROUTE:
-                        return ip_add_route_req_local(0, IPC_GET_DEVICE(call),
-                            IP_GET_ADDRESS(call), IP_GET_NETMASK(call), IP_GET_GATEWAY(call));
-                case NET_IP_SET_GATEWAY:
-                        return ip_set_gateway_req_local(0, IPC_GET_DEVICE(call),
-                            IP_GET_GATEWAY(call));
-                case NET_IP_GET_ROUTE:
-                        ERROR_PROPAGATE(data_receive((void **) &addr, &addrlen));
-                        ERROR_PROPAGATE(ip_get_route_req_local(0, IP_GET_PROTOCOL(call),
-                            addr, (socklen_t) addrlen, &device_id, &header, &headerlen));
-                        IPC_SET_DEVICE(answer, device_id);
-                        IP_SET_HEADERLEN(answer, headerlen);
+        case IPC_M_PHONE_HUNGUP:
+                return EOK;
+        
+        case IPC_M_CONNECT_TO_ME:
+                return ip_register(IL_GET_PROTO(call), IL_GET_SERVICE(call),
+                    IPC_GET_PHONE(call), NULL);
+        
+        case NET_IL_DEVICE:
+                return ip_device_req_local(0, IPC_GET_DEVICE(call),
+                    IPC_GET_SERVICE(call));
+        
+        case NET_IL_SEND:
+                ERROR_PROPAGATE(packet_translate_remote(ip_globals.net_phone,
+                    &packet, IPC_GET_PACKET(call)));
+                return ip_send_msg_local(0, IPC_GET_DEVICE(call), packet, 0,
+                    IPC_GET_ERROR(call));
+        
+        case NET_IL_DEVICE_STATE:
+                return ip_device_state_message(IPC_GET_DEVICE(call),
+                    IPC_GET_STATE(call));
+        
+        case NET_IL_RECEIVED:
+                ERROR_PROPAGATE(packet_translate_remote(ip_globals.net_phone,
+                    &packet, IPC_GET_PACKET(call)));
+                return ip_receive_message(IPC_GET_DEVICE(call), packet);
+        
+        case NET_IP_RECEIVED_ERROR:
+                ERROR_PROPAGATE(packet_translate_remote(ip_globals.net_phone,
+                    &packet, IPC_GET_PACKET(call)));
+                return ip_received_error_msg_local(0, IPC_GET_DEVICE(call),
+                    packet, IPC_GET_TARGET(call), IPC_GET_ERROR(call));
+        
+        case NET_IP_ADD_ROUTE:
+                return ip_add_route_req_local(0, IPC_GET_DEVICE(call),
+                    IP_GET_ADDRESS(call), IP_GET_NETMASK(call),
+                    IP_GET_GATEWAY(call));
+
+        case NET_IP_SET_GATEWAY:
+                return ip_set_gateway_req_local(0, IPC_GET_DEVICE(call),
+                    IP_GET_GATEWAY(call));
+
+        case NET_IP_GET_ROUTE:
+                ERROR_PROPAGATE(data_receive((void **) &addr, &addrlen));
+                ERROR_PROPAGATE(ip_get_route_req_local(0, IP_GET_PROTOCOL(call),
+                    addr, (socklen_t) addrlen, &device_id, &header,
+                    &headerlen));
+                IPC_SET_DEVICE(answer, device_id);
+                IP_SET_HEADERLEN(answer, headerlen);
+                
+                *answer_count = 2;
                         
-                        *answer_count = 2;
+                if (ERROR_NONE(data_reply(&headerlen, sizeof(headerlen))))
+                        ERROR_CODE = data_reply(header, headerlen);
                         
-                        if (!ERROR_OCCURRED(data_reply(&headerlen, sizeof(headerlen))))
-                                ERROR_CODE = data_reply(header, headerlen);
-                        
-                        free(header);
-                        return ERROR_CODE;
-                case NET_IL_PACKET_SPACE:
-                        ERROR_PROPAGATE(ip_packet_size_message(IPC_GET_DEVICE(call),
-                            &addrlen, &prefix, &content, &suffix));
-                        IPC_SET_ADDR(answer, addrlen);
-                        IPC_SET_PREFIX(answer, prefix);
-                        IPC_SET_CONTENT(answer, content);
-                        IPC_SET_SUFFIX(answer, suffix);
-                        *answer_count = 4;
-                        return EOK;
-                case NET_IL_MTU_CHANGED:
-                        return ip_mtu_changed_message(IPC_GET_DEVICE(call),
-                            IPC_GET_MTU(call));
+                free(header);
+                return ERROR_CODE;
+        
+        case NET_IL_PACKET_SPACE:
+                ERROR_PROPAGATE(ip_packet_size_message(IPC_GET_DEVICE(call),
+                    &addrlen, &prefix, &content, &suffix));
+                IPC_SET_ADDR(answer, addrlen);
+                IPC_SET_PREFIX(answer, prefix);
+                IPC_SET_CONTENT(answer, content);
+                IPC_SET_SUFFIX(answer, suffix);
+                *answer_count = 4;
+                return EOK;
+        
+        case NET_IL_MTU_CHANGED:
+                return ip_mtu_changed_message(IPC_GET_DEVICE(call),
+                    IPC_GET_MTU(call));
         }
         
@@ -966 +1956 @@
 }
 
-int ip_packet_size_req_local(int ip_phone, device_id_t device_id,
-    packet_dimension_ref packet_dimension)
-{
-        if (!packet_dimension)
-                return EBADMEM;
-        
-        return ip_packet_size_message(device_id, &packet_dimension->addr_len,
-            &packet_dimension->prefix, &packet_dimension->content,
-            &packet_dimension->suffix);
-}
-
-int ip_packet_size_message(device_id_t device_id, size_t * addr_len, size_t * prefix, size_t * content, size_t * suffix){
-        ip_netif_ref netif;
-        int index;
-
-        if(!(addr_len && prefix && content && suffix)){
-                return EBADMEM;
-        }
-        *content = IP_MAX_CONTENT - IP_PREFIX;
-        fibril_rwlock_read_lock(&ip_globals.netifs_lock);
-        if(device_id < 0){
-                *addr_len = IP_ADDR;
-                *prefix = 0;
-                *suffix = 0;
-                for(index = ip_netifs_count(&ip_globals.netifs) - 1; index >= 0; -- index){
-                        netif = ip_netifs_get_index(&ip_globals.netifs, index);
-                        if(netif){
-                                if(netif->packet_dimension.addr_len > * addr_len){
-                                        *addr_len = netif->packet_dimension.addr_len;
-                                }
-                                if(netif->packet_dimension.prefix > * prefix){
-                                        *prefix = netif->packet_dimension.prefix;
-                                }
-                                if(netif->packet_dimension.suffix > * suffix){
-                                        *suffix = netif->packet_dimension.suffix;
-                                }
-                        }
-                }
-                *prefix = * prefix + IP_PREFIX;
-                *suffix = * suffix + IP_SUFFIX;
-        }else{
-                netif = ip_netifs_find(&ip_globals.netifs, device_id);
-                if(! netif){
-                        fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
-                        return ENOENT;
-                }
-                *addr_len = (netif->packet_dimension.addr_len > IP_ADDR) ? netif->packet_dimension.addr_len : IP_ADDR;
-                *prefix = netif->packet_dimension.prefix + IP_PREFIX;
-                *suffix = netif->packet_dimension.suffix + IP_SUFFIX;
-        }
-        fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
-        return EOK;
-}
-
-int ip_add_route_req_local(int ip_phone, device_id_t device_id, in_addr_t address, in_addr_t netmask, in_addr_t gateway){
-        ip_route_ref route;
-        ip_netif_ref netif;
-        int index;
-
-        fibril_rwlock_write_lock(&ip_globals.netifs_lock);
-        netif = ip_netifs_find(&ip_globals.netifs, device_id);
-        if(! netif){
-                fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
-                return ENOENT;
-        }
-        route = (ip_route_ref) malloc(sizeof(ip_route_t));
-        if(! route){
-                fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
-                return ENOMEM;
-        }
-        route->address.s_addr = address.s_addr;
-        route->netmask.s_addr = netmask.s_addr;
-        route->gateway.s_addr = gateway.s_addr;
-        route->netif = netif;
-        index = ip_routes_add(&netif->routes, route);
-        if(index < 0){
-                free(route);
-        }
-        fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
-        return index;
-}
-
-ip_route_ref ip_find_route(in_addr_t destination){
-        int index;
-        ip_route_ref route;
-        ip_netif_ref netif;
-
-        // start with the last netif - the newest one
-        index = ip_netifs_count(&ip_globals.netifs) - 1;
-        while(index >= 0){
-                netif = ip_netifs_get_index(&ip_globals.netifs, index);
-                if(netif && (netif->state == NETIF_ACTIVE)){
-                        route = ip_netif_find_route(netif, destination);
-                        if(route){
-                                return route;
-                        }
-                }
-                -- index;
-        }
-        return &ip_globals.gateway;
-}
-
-ip_route_ref ip_netif_find_route(ip_netif_ref netif, in_addr_t destination){
-        int index;
-        ip_route_ref route;
-
-        if(netif){
-                // start with the first one - the direct route
-                for(index = 0; index < ip_routes_count(&netif->routes); ++ index){
-                        route = ip_routes_get_index(&netif->routes, index);
-                        if(route && ((route->address.s_addr &route->netmask.s_addr) == (destination.s_addr &route->netmask.s_addr))){
-                                return route;
-                        }
-                }
-        }
-        return NULL;
-}
-
-int ip_set_gateway_req_local(int ip_phone, device_id_t device_id, in_addr_t gateway)
-{
-        ip_netif_ref netif;
-
-        fibril_rwlock_write_lock(&ip_globals.netifs_lock);
-        netif = ip_netifs_find(&ip_globals.netifs, device_id);
-        if(! netif){
-                fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
-                return ENOENT;
-        }
-        ip_globals.gateway.address.s_addr = 0;
-        ip_globals.gateway.netmask.s_addr = 0;
-        ip_globals.gateway.gateway.s_addr = gateway.s_addr;
-        ip_globals.gateway.netif = netif;
-        fibril_rwlock_write_unlock(&ip_globals.netifs_lock);
-        return EOK;
-}
-
-packet_t ip_split_packet(packet_t packet, size_t prefix, size_t content, size_t suffix, socklen_t addr_len, services_t error){
-        size_t length;
-        packet_t next;
-        packet_t new_packet;
-        int result;
-        int phone;
-
-        next = packet;
-        // check all packets
-        while(next){
-                length = packet_get_data_length(next);
-                // too long?
-                if(length > content){
-                        result = ip_fragment_packet(next, content, prefix, suffix, addr_len);
-                        if(result != EOK){
-                                new_packet = pq_detach(next);
-                                if(next == packet){
-                                        // the new first packet of the queue
-                                        packet = new_packet;
-                                }
-                                // fragmentation needed?
-                                if(result == EPERM){
-                                        phone = ip_prepare_icmp_and_get_phone(error, next, NULL);
-                                        if(phone >= 0){
-                                                // fragmentation necessary ICMP
-                                                icmp_destination_unreachable_msg(phone, ICMP_FRAG_NEEDED, content, next);
-                                        }
-                                }else{
-                                        pq_release_remote(ip_globals.net_phone, packet_get_id(next));
-                                }
-                                next = new_packet;
-                                continue;
-                        }
-                }
-                next = pq_next(next);
-        }
-        return packet;
-}
-
-int ip_fragment_packet(packet_t packet, size_t length, size_t prefix, size_t suffix, socklen_t addr_len){
-        ERROR_DECLARE;
-
-        packet_t new_packet;
-        ip_header_ref header;
-        ip_header_ref middle_header;
-        ip_header_ref last_header;
-        struct sockaddr * src;
-        struct sockaddr * dest;
-        socklen_t addrlen;
-        int result;
-
-        result = packet_get_addr(packet, (uint8_t **) &src, (uint8_t **) &dest);
-        if(result <= 0){
-                return EINVAL;
-        }
-        addrlen = (socklen_t) result;
-        if(packet_get_data_length(packet) <= sizeof(ip_header_t)){
-                return ENOMEM;
-        }
-        // get header
-        header = (ip_header_ref) packet_get_data(packet);
-        if(! header){
-                return EINVAL;
-        }
-        // fragmentation forbidden?
-        if(header->flags &IPFLAG_DONT_FRAGMENT){
-                return EPERM;
-        }
-        // create the last fragment
-        new_packet = packet_get_4_remote(ip_globals.net_phone, prefix, length, suffix, ((addrlen > addr_len) ? addrlen : addr_len));
-        if(! new_packet){
-                return ENOMEM;
-        }
-        // allocate as much as originally
-        last_header = (ip_header_ref) packet_suffix(new_packet, IP_HEADER_LENGTH(header));
-        if(! last_header){
-                return ip_release_and_return(packet, ENOMEM);
-        }
-        ip_create_last_header(last_header, header);
-        // trim the unused space
-        if(ERROR_OCCURRED(packet_trim(new_packet, 0, IP_HEADER_LENGTH(header) - IP_HEADER_LENGTH(last_header)))){
-                return ip_release_and_return(packet, ERROR_CODE);
-        }
-        // biggest multiple of 8 lower than content
-        // TODO even fragmentation?
-        length = length &(~ 0x7);// (content / 8) * 8
-        if(ERROR_OCCURRED(ip_fragment_packet_data(packet, new_packet, header, last_header, ((IP_HEADER_DATA_LENGTH(header) - ((length - IP_HEADER_LENGTH(header)) &(~ 0x7))) % ((length - IP_HEADER_LENGTH(last_header)) &(~ 0x7))), src, dest, addrlen))){
-                return ip_release_and_return(packet, ERROR_CODE);
-        }
-        // mark the first as fragmented
-        header->flags |= IPFLAG_MORE_FRAGMENTS;
-        // create middle framgents
-        while(IP_TOTAL_LENGTH(header) > length){
-                new_packet = packet_get_4_remote(ip_globals.net_phone, prefix, length, suffix, ((addrlen >= addr_len) ? addrlen : addr_len));
-                if(! new_packet){
-                        return ENOMEM;
-                }
-                middle_header = ip_create_middle_header(new_packet, last_header);
-                if(! middle_header){
-                        return ip_release_and_return(packet, ENOMEM);
-                }
-                if(ERROR_OCCURRED(ip_fragment_packet_data(packet, new_packet, header, middle_header, (length - IP_HEADER_LENGTH(middle_header)) &(~ 0x7), src, dest, addrlen))){
-                        return ip_release_and_return(packet, ERROR_CODE);
-                }
-        }
-        // finish the first fragment
-        header->header_checksum = IP_HEADER_CHECKSUM(header);
-        return EOK;
-}
-
-int ip_fragment_packet_data(packet_t packet, packet_t new_packet, ip_header_ref header, ip_header_ref new_header, size_t length, const struct sockaddr * src, const struct sockaddr * dest, socklen_t addrlen){
-        ERROR_DECLARE;
-
-        void * data;
-        size_t offset;
-
-        data = packet_suffix(new_packet, length);
-        if(! data){
-                return ENOMEM;
-        }
-        memcpy(data, ((void *) header) + IP_TOTAL_LENGTH(header) - length, length);
-        ERROR_PROPAGATE(packet_trim(packet, 0, length));
-        header->total_length = htons(IP_TOTAL_LENGTH(header) - length);
-        new_header->total_length = htons(IP_HEADER_LENGTH(new_header) + length);
-        offset = IP_FRAGMENT_OFFSET(header) + IP_HEADER_DATA_LENGTH(header);
-        new_header->fragment_offset_high = IP_COMPUTE_FRAGMENT_OFFSET_HIGH(offset);
-        new_header->fragment_offset_low = IP_COMPUTE_FRAGMENT_OFFSET_LOW(offset);
-        new_header->header_checksum = IP_HEADER_CHECKSUM(new_header);
-        ERROR_PROPAGATE(packet_set_addr(new_packet, (const uint8_t *) src, (const uint8_t *) dest, addrlen));
-        return pq_insert_after(packet, new_packet);
-}
-
-ip_header_ref ip_create_middle_header(packet_t packet, ip_header_ref last){
-        ip_header_ref middle;
-
-        middle = (ip_header_ref) packet_suffix(packet, IP_HEADER_LENGTH(last));
-        if(! middle){
-                return NULL;
-        }
-        memcpy(middle, last, IP_HEADER_LENGTH(last));
-        middle->flags |= IPFLAG_MORE_FRAGMENTS;
-        return middle;
-}
-
-void ip_create_last_header(ip_header_ref last, ip_header_ref first){
-        ip_option_ref option;
-        size_t next;
-        size_t length;
-
-        // copy first itself
-        memcpy(last, first, sizeof(ip_header_t));
-        length = sizeof(ip_header_t);
-        next = sizeof(ip_header_t);
-        // process all ip options
-        while(next < first->header_length){
-                option = (ip_option_ref) (((uint8_t *) first) + next);
-                // skip end or noop
-                if((option->type == IPOPT_END) || (option->type == IPOPT_NOOP)){
-                        ++ next;
-                }else{
-                        // copy if said so or skip
-                        if(IPOPT_COPIED(option->type)){
-                                memcpy(((uint8_t *) last) + length, ((uint8_t *) first) + next, option->length);
-                                length += option->length;
-                        }
-                        // next option
-                        next += option->length;
-                }
-        }
-        // align 4 byte boundary
-        if(length % 4){
-                bzero(((uint8_t *) last) + length, 4 - (length % 4));
-                last->header_length = length / 4 + 1;
-        }else{
-                last->header_length = length / 4;
-        }
-        last->header_checksum = 0;
-}
-
-int ip_receive_message(device_id_t device_id, packet_t packet){
-        packet_t next;
-
-        do{
-                next = pq_detach(packet);
-                ip_process_packet(device_id, packet);
-                packet = next;
-        }while(packet);
-        return EOK;
-}
-
-int ip_process_packet(device_id_t device_id, packet_t packet){
-        ERROR_DECLARE;
-
-        ip_header_ref header;
-        in_addr_t dest;
-        ip_route_ref route;
-        int phone;
-        struct sockaddr * addr;
-        struct sockaddr_in addr_in;
-//      struct sockaddr_in      addr_in6;
-        socklen_t addrlen;
-
-        header = (ip_header_ref) packet_get_data(packet);
-        if(! header){
-                return ip_release_and_return(packet, ENOMEM);
-        }
-        // checksum
-        if((header->header_checksum) && (IP_HEADER_CHECKSUM(header) != IP_CHECKSUM_ZERO)){
-                phone = ip_prepare_icmp_and_get_phone(0, packet, header);
-                if(phone >= 0){
-                        // checksum error ICMP
-                        icmp_parameter_problem_msg(phone, ICMP_PARAM_POINTER, ((size_t) ((void *) &header->header_checksum)) - ((size_t) ((void *) header)), packet);
-                }
-                return EINVAL;
-        }
-        if(header->ttl <= 1){
-                phone = ip_prepare_icmp_and_get_phone(0, packet, header);
-                if(phone >= 0){
-                        // ttl oxceeded ICMP
-                        icmp_time_exceeded_msg(phone, ICMP_EXC_TTL, packet);
-                }
-                return EINVAL;
-        }
-        // process ipopt and get destination
-        dest = ip_get_destination(header);
-        // set the addrination address
-        switch(header->version){
-                case IPVERSION:
-                        addrlen = sizeof(addr_in);
-                        bzero(&addr_in, addrlen);
-                        addr_in.sin_family = AF_INET;
-                        memcpy(&addr_in.sin_addr.s_addr, &dest, sizeof(dest));
-                        addr = (struct sockaddr *) &addr_in;
-                        break;
-/*              case IPv6VERSION:
-                        addrlen = sizeof(dest_in6);
-                        bzero(&dest_in6, addrlen);
-                        dest_in6.sin6_family = AF_INET6;
-                        memcpy(&dest_in6.sin6_addr.s6_addr,);
-                        dest = (struct sockaddr *) &dest_in;
-                        break;
-*/              default:
-                        return ip_release_and_return(packet, EAFNOSUPPORT);
-        }
-        ERROR_PROPAGATE(packet_set_addr(packet, NULL, (uint8_t *) &addr, addrlen));
-        route = ip_find_route(dest);
-        if(! route){
-                phone = ip_prepare_icmp_and_get_phone(0, packet, header);
-                if(phone >= 0){
-                        // unreachable ICMP
-                        icmp_destination_unreachable_msg(phone, ICMP_HOST_UNREACH, 0, packet);
-                }
-                return ENOENT;
-        }
-        if(route->address.s_addr == dest.s_addr){
-                // local delivery
-                return ip_deliver_local(device_id, packet, header, 0);
-        }else{
-                // only if routing enabled
-                if(route->netif->routing){
-                        -- header->ttl;
-                        return ip_send_route(packet, route->netif, route, NULL, dest, 0);
-                }else{
-                        phone = ip_prepare_icmp_and_get_phone(0, packet, header);
-                        if(phone >= 0){
-                                // unreachable ICMP if no routing
-                                icmp_destination_unreachable_msg(phone, ICMP_HOST_UNREACH, 0, packet);
-                        }
-                        return ENOENT;
-                }
-        }
-}
-
-/** Notify the IP module about the received error notification packet.
- *
- * @param[in] ip_phone  The IP module phone used for (semi)remote calls.
- * @param[in] device_id The device identifier.
- * @param[in] packet    The received packet or the received packet queue.
- * @param[in] target    The target internetwork module service to be
- *                      delivered to.
- * @param[in] error     The packet error reporting service. Prefixes the
- *                      received packet.
- *
- * @return EOK on success.
- *
- */
-int ip_received_error_msg_local(int ip_phone, device_id_t device_id, packet_t packet, services_t target, services_t error){
-        uint8_t * data;
-        int offset;
-        icmp_type_t type;
-        icmp_code_t code;
-        ip_netif_ref netif;
-        measured_string_t address;
-        ip_route_ref route;
-        ip_header_ref header;
-
-        switch(error){
-                case SERVICE_ICMP:
-                        offset = icmp_client_process_packet(packet, &type, &code, NULL, NULL);
-                        if(offset < 0){
-                                return ip_release_and_return(packet, ENOMEM);
-                        }
-                        data = packet_get_data(packet);
-                        header = (ip_header_ref)(data + offset);
-                        // destination host unreachable?
-                        if((type == ICMP_DEST_UNREACH) && (code == ICMP_HOST_UNREACH)){
-                                fibril_rwlock_read_lock(&ip_globals.netifs_lock);
-                                netif = ip_netifs_find(&ip_globals.netifs, device_id);
-                                if(netif && netif->arp){
-                                        route = ip_routes_get_index(&netif->routes, 0);
-                                        // from the same network?
-                                        if(route && ((route->address.s_addr &route->netmask.s_addr) == (header->destination_address &route->netmask.s_addr))){
-                                                // clear the ARP mapping if any
-                                                address.value = (char *) &header->destination_address;
-                                                address.length = CONVERT_SIZE(uint8_t, char, sizeof(header->destination_address));
-                                                arp_clear_address_req(netif->arp->phone, netif->device_id, SERVICE_IP, &address);
-                                        }
-                                }
-                                fibril_rwlock_read_unlock(&ip_globals.netifs_lock);
-                        }
-                        break;
-                default:
-                        return ip_release_and_return(packet, ENOTSUP);
-        }
-        return ip_deliver_local(device_id, packet, header, error);
-}
-
-int ip_deliver_local(device_id_t device_id, packet_t packet, ip_header_ref header, services_t error){
-        ERROR_DECLARE;
-
-        ip_proto_ref proto;
-        int phone;
-        services_t service;
-        tl_received_msg_t received_msg;
-        struct sockaddr * src;
-        struct sockaddr * dest;
-        struct sockaddr_in src_in;
-        struct sockaddr_in dest_in;
-//      struct sockaddr_in      src_in6;
-//      struct sockaddr_in      dest_in6;
-        socklen_t addrlen;
-
-        if((header->flags &IPFLAG_MORE_FRAGMENTS) || IP_FRAGMENT_OFFSET(header)){
-                // TODO fragmented
-                return ENOTSUP;
-        }else{
-                switch(header->version){
-                        case IPVERSION:
-                                addrlen = sizeof(src_in);
-                                bzero(&src_in, addrlen);
-                                src_in.sin_family = AF_INET;
-                                memcpy(&dest_in, &src_in, addrlen);
-                                memcpy(&src_in.sin_addr.s_addr, &header->source_address, sizeof(header->source_address));
-                                memcpy(&dest_in.sin_addr.s_addr, &header->destination_address, sizeof(header->destination_address));
-                                src = (struct sockaddr *) &src_in;
-                                dest = (struct sockaddr *) &dest_in;
-                                break;
-/*                      case IPv6VERSION:
-                                addrlen = sizeof(src_in6);
-                                bzero(&src_in6, addrlen);
-                                src_in6.sin6_family = AF_INET6;
-                                memcpy(&dest_in6, &src_in6, addrlen);
-                                memcpy(&src_in6.sin6_addr.s6_addr,);
-                                memcpy(&dest_in6.sin6_addr.s6_addr,);
-                                src = (struct sockaddr *) &src_in;
-                                dest = (struct sockaddr *) &dest_in;
-                                break;
-*/                      default:
-                                return ip_release_and_return(packet, EAFNOSUPPORT);
-                }
-                if(ERROR_OCCURRED(packet_set_addr(packet, (uint8_t *) src, (uint8_t *) dest, addrlen))){
-                        return ip_release_and_return(packet, ERROR_CODE);
-                }
-                // trim padding if present
-                if((! error) && (IP_TOTAL_LENGTH(header) < packet_get_data_length(packet))){
-                        if(ERROR_OCCURRED(packet_trim(packet, 0, packet_get_data_length(packet) - IP_TOTAL_LENGTH(header)))){
-                                return ip_release_and_return(packet, ERROR_CODE);
-                        }
-                }
-                fibril_rwlock_read_lock(&ip_globals.protos_lock);
-                proto = ip_protos_find(&ip_globals.protos, header->protocol);
-                if(! proto){
-                        fibril_rwlock_read_unlock(&ip_globals.protos_lock);
-                        phone = ip_prepare_icmp_and_get_phone(error, packet, header);
-                        if(phone >= 0){
-                                // unreachable ICMP
-                                icmp_destination_unreachable_msg(phone, ICMP_PROT_UNREACH, 0, packet);
-                        }
-                        return ENOENT;
-                }
-                if(proto->received_msg){
-                        service = proto->service;
-                        received_msg = proto->received_msg;
-                        fibril_rwlock_read_unlock(&ip_globals.protos_lock);
-                        ERROR_CODE = received_msg(device_id, packet, service, error);
-                }else{
-                        ERROR_CODE = tl_received_msg(proto->phone, device_id, packet, proto->service, error);
-                        fibril_rwlock_read_unlock(&ip_globals.protos_lock);
-                }
-                return ERROR_CODE;
-        }
-}
-
-in_addr_t ip_get_destination(ip_header_ref header){
-        in_addr_t destination;
-
-        // TODO search set ipopt route?
-        destination.s_addr = header->destination_address;
-        return destination;
-}
-
-int ip_prepare_icmp(packet_t packet, ip_header_ref header){
-        packet_t next;
-        struct sockaddr * dest;
-        struct sockaddr_in dest_in;
-//      struct sockaddr_in      dest_in6;
-        socklen_t addrlen;
-
-        // detach the first packet and release the others
-        next = pq_detach(packet);
-        if(next){
-                pq_release_remote(ip_globals.net_phone, packet_get_id(next));
-        }
-        if(! header){
-                if(packet_get_data_length(packet) <= sizeof(ip_header_t)){
-                        return ENOMEM;
-                }
-                // get header
-                header = (ip_header_ref) packet_get_data(packet);
-                if(! header){
-                        return EINVAL;
-                }
-        }
-        // only for the first fragment
-        if(IP_FRAGMENT_OFFSET(header)){
-                return EINVAL;
-        }
-        // not for the ICMP protocol
-        if(header->protocol == IPPROTO_ICMP){
-                return EPERM;
-        }
-        // set the destination address
-        switch(header->version){
-                case IPVERSION:
-                        addrlen = sizeof(dest_in);
-                        bzero(&dest_in, addrlen);
-                        dest_in.sin_family = AF_INET;
-                        memcpy(&dest_in.sin_addr.s_addr, &header->source_address, sizeof(header->source_address));
-                        dest = (struct sockaddr *) &dest_in;
-                        break;
-/*              case IPv6VERSION:
-                        addrlen = sizeof(dest_in6);
-                        bzero(&dest_in6, addrlen);
-                        dest_in6.sin6_family = AF_INET6;
-                        memcpy(&dest_in6.sin6_addr.s6_addr,);
-                        dest = (struct sockaddr *) &dest_in;
-                        break;
-*/              default:
-                        return EAFNOSUPPORT;
-        }
-        return packet_set_addr(packet, NULL, (uint8_t *) dest, addrlen);
-}
-
-int ip_get_icmp_phone(void){
-        ip_proto_ref proto;
-        int phone;
-
-        fibril_rwlock_read_lock(&ip_globals.protos_lock);
-        proto = ip_protos_find(&ip_globals.protos, IPPROTO_ICMP);
-        phone = proto ? proto->phone : ENOENT;
-        fibril_rwlock_read_unlock(&ip_globals.protos_lock);
-        return phone;
-}
-
-int ip_prepare_icmp_and_get_phone(services_t error, packet_t packet, ip_header_ref header){
-        int phone;
-
-        phone = ip_get_icmp_phone();
-        if(error || (phone < 0) || ip_prepare_icmp(packet, header)){
-                return ip_release_and_return(packet, EINVAL);
-        }
-        return phone;
-}
-
-int ip_release_and_return(packet_t packet, int result){
-        pq_release_remote(ip_globals.net_phone, packet_get_id(packet));
-        return result;
-}
-
-int ip_get_route_req_local(int ip_phone, ip_protocol_t protocol, const struct sockaddr * destination, socklen_t addrlen, device_id_t * device_id, void **header, size_t * headerlen){
-        struct sockaddr_in * address_in;
-//      struct sockaddr_in6 *   address_in6;
-        in_addr_t * dest;
-        in_addr_t * src;
-        ip_route_ref route;
-        ipv4_pseudo_header_ref header_in;
-
-        if(!(destination && (addrlen > 0))){
-                return EINVAL;
-        }
-        if(!(device_id && header && headerlen)){
-                return EBADMEM;
-        }
-        if((size_t) addrlen < sizeof(struct sockaddr)){
-                return EINVAL;
-        }
-        switch(destination->sa_family){
-                case AF_INET:
-                        if(addrlen != sizeof(struct sockaddr_in)){
-                                return EINVAL;
-                        }
-                        address_in = (struct sockaddr_in *) destination;
-                        dest = &address_in->sin_addr;
-                        if(! dest->s_addr){
-                                dest->s_addr = IPV4_LOCALHOST_ADDRESS;
-                        }
-                        break;
-                // TODO IPv6
-/*              case AF_INET6:
-                        if(addrlen != sizeof(struct sockaddr_in6)){
-                                return EINVAL;
-                        }
-                        address_in6 = (struct sockaddr_in6 *) dest;
-                        address_in6.sin6_addr.s6_addr;
-*/              default:
-                        return EAFNOSUPPORT;
-        }
-        fibril_rwlock_read_lock(&ip_globals.lock);
-        route = ip_find_route(*dest);
-        // if the local host is the destination
-        if(route && (route->address.s_addr == dest->s_addr)
-                && (dest->s_addr != IPV4_LOCALHOST_ADDRESS)){
-                // find the loopback device to deliver
-                dest->s_addr = IPV4_LOCALHOST_ADDRESS;
-                route = ip_find_route(*dest);
-        }
-        if(!(route && route->netif)){
-                fibril_rwlock_read_unlock(&ip_globals.lock);
-                return ENOENT;
-        }
-        *device_id = route->netif->device_id;
-        src = ip_netif_address(route->netif);
-        fibril_rwlock_read_unlock(&ip_globals.lock);
-        *headerlen = sizeof(*header_in);
-        header_in = (ipv4_pseudo_header_ref) malloc(*headerlen);
-        if(! header_in){
-                return ENOMEM;
-        }
-        bzero(header_in, * headerlen);
-        header_in->destination_address = dest->s_addr;
-        header_in->source_address = src->s_addr;
-        header_in->protocol = protocol;
-        header_in->data_length = 0;
-        *header = header_in;
-        return EOK;
-}
-
 /** Default thread for new connections.
  *
- *  @param[in] iid The initial message identifier.
- *  @param[in] icall The initial message call structure.
- *
- */
-static void il_client_connection(ipc_callid_t iid, ipc_call_t * icall)
+ * @param[in] iid       The initial message identifier.
+ * @param[in] icall     The initial message call structure.
+ */
+static void il_client_connection(ipc_callid_t iid, ipc_call_t *icall)
 {
         /*
@@ -1673 +1969 @@
         ipc_answer_0(iid, EOK);
         
-        while(true) {
+        while (true) {
                 ipc_call_t answer;
                 int answer_count;
@@ -1688 +1984 @@
                     &answer_count);
                 
-                /* End if said to either by the message or the processing result */
-                if ((IPC_GET_METHOD(call) == IPC_M_PHONE_HUNGUP) || (res == EHANGUP))
+                /*
+                 * End if told to either by the message or the processing
+                 * result.
+                 */
+                if ((IPC_GET_METHOD(call) == IPC_M_PHONE_HUNGUP) ||
+                    (res == EHANGUP)) {
                         return;
+                }
                 
                 /* Answer the message */
@@ -1699 +2000 @@
 /** Starts the module.
  *
- *  @param argc The count of the command line arguments. Ignored parameter.
- *  @param argv The command line parameters. Ignored parameter.
- *
- *  @returns EOK on success.
- *  @returns Other error codes as defined for each specific module start function.
- *
+ * @returns EOK on success.
+ * @returns Other error codes as defined for each specific module start function.
  */
 int main(int argc, char *argv[])
@@ -1711 +2008 @@
         
         /* Start the module */
-        if (ERROR_OCCURRED(il_module_start_standalone(il_client_connection)))
-                return ERROR_CODE;
-        
+        ERROR_PROPAGATE(il_module_start_standalone(il_client_connection));
         return EOK;
 }

uspace/srv/net/il/ip/ip.h

@@ -28 +28 @@
 
 /** @addtogroup ip
- *  @{
+ * @{
  */
 
 /** @file
- *  IP module.
+ * IP module.
  */
 
-#ifndef __NET_IP_H__
-#define __NET_IP_H__
+#ifndef NET_IP_H_
+#define NET_IP_H_
 
 #include <fibril_synch.h>
@@ -50 +50 @@
 
 /** Type definition of the IP global data.
- *  @see ip_globals
+ * @see ip_globals
  */
-typedef struct ip_globals       ip_globals_t;
+typedef struct ip_globals ip_globals_t;
 
 /** Type definition of the IP network interface specific data.
- *  @see ip_netif
+ * @see ip_netif
  */
-typedef struct ip_netif ip_netif_t;
+typedef struct ip_netif ip_netif_t;
 
 /** Type definition of the IP network interface specific data pointer.
- *  @see ip_netif
+ * @see ip_netif
  */
-typedef ip_netif_t *    ip_netif_ref;
+typedef ip_netif_t *ip_netif_ref;
 
 /** Type definition of the IP protocol specific data.
- *  @see ip_proto
+ * @see ip_proto
  */
-typedef struct ip_proto ip_proto_t;
+typedef struct ip_proto ip_proto_t;
 
 /** Type definition of the IP protocol specific data pointer.
- *  @see ip_proto
+ * @see ip_proto
  */
-typedef ip_proto_t *    ip_proto_ref;
+typedef ip_proto_t *ip_proto_ref;
 
 /** Type definition of the IP route specific data.
@@ -82 +82 @@
  *  @see ip_route
  */
-typedef ip_route_t *    ip_route_ref;
+typedef ip_route_t *ip_route_ref;
 
 /** IP network interfaces.
- *  Maps devices to the IP network interface specific data.
- *  @see device.h
+ * Maps devices to the IP network interface specific data.
+ * @see device.h
  */
-DEVICE_MAP_DECLARE(ip_netifs, ip_netif_t)
+DEVICE_MAP_DECLARE(ip_netifs, ip_netif_t);
 
 /** IP registered protocols.
- *  Maps protocols to the IP protocol specific data.
- *  @see int_map.h
+ * Maps protocols to the IP protocol specific data.
+ * @see int_map.h
  */
-INT_MAP_DECLARE(ip_protos, ip_proto_t)
+INT_MAP_DECLARE(ip_protos, ip_proto_t);
 
 /** IP routing table.
- *  @see generic_field.h
+ * @see generic_field.h
  */
-GENERIC_FIELD_DECLARE(ip_routes, ip_route_t)
+GENERIC_FIELD_DECLARE(ip_routes, ip_route_t);
 
-/** IP network interface specific data.
- */
-struct  ip_netif{
-        /** ARP module.
-         *  Assigned if using ARP.
-         */
+/** IP network interface specific data. */
+struct ip_netif {
+        /** ARP module. Assigned if using ARP. */
         module_ref arp;
-        /** Broadcast address.
-         */
+        /** Broadcast address. */
         in_addr_t broadcast;
-        /** Device identifier.
-         */
+        /** Device identifier. */
         device_id_t device_id;
-        /** Indicates whether using DHCP.
-         */
+        /** Indicates whether using DHCP. */
         int dhcp;
-        /** IP version.
-         */
+        /** IP version. */
         int ipv;
-        /** Packet dimension.
-         */
+        /** Packet dimension. */
         packet_dimension_t packet_dimension;
-        /** Netif module phone.
-         */
+        /** Netif module phone. */
         int phone;
-        /** Routing table.
-         */
+        /** Routing table. */
         ip_routes_t routes;
-        /** Indicates whether IP routing is enabled.
-         */
+        /** Indicates whether IP routing is enabled. */
         int routing;
-        /** Netif module service.
-         */
+        /** Netif module service. */
         services_t service;
-        /** Device state.
-         */
+        /** Device state. */
         device_state_t state;
 };
 
-/** IP protocol specific data.
- */
-struct ip_proto{
-        /** Protocol module phone.
-         */
+/** IP protocol specific data. */
+struct ip_proto {
+        /** Protocol module phone. */
         int phone;
-        /** Protocol number.
-         */
+        /** Protocol number. */
         int protocol;
-        /** Protocol packet receiving function.
-         */
+        /** Protocol packet receiving function. */
         tl_received_msg_t received_msg;
-        /** Protocol module service.
-         */
+        /** Protocol module service. */
         services_t service;
 };
 
-/** IP route specific data.
- */
-struct ip_route{
-        /** Target address.
-         */
+/** IP route specific data. */
+struct ip_route {
+        /** Target address. */
         in_addr_t address;
-        /** Gateway.
-         */
+        /** Gateway. */
         in_addr_t gateway;
-        /** Parent netif.
-         */
+        /** Parent netif. */
         ip_netif_ref netif;
-        /** Target network mask.
-         */
+        /** Target network mask. */
         in_addr_t netmask;
 };
 
-/** IP global data.
- */
-struct  ip_globals{
-        /** Default client connection function for support modules.
-         */
+/** IP global data. */
+struct ip_globals {
+        /** Default client connection function for support modules. */
         async_client_conn_t client_connection;
-        /** Default gateway.
-         */
+        /** Default gateway. */
         ip_route_t gateway;
-        /** Safety lock.
-         */
+        /** Safety lock. */
         fibril_rwlock_t lock;
-        /** Known support modules.
-         */
+        /** Known support modules. */
         modules_t modules;
-        /** Networking module phone.
-         */
+        /** Networking module phone. */
         int net_phone;
-        /** Registered network interfaces.
-         */
+        /** Registered network interfaces. */
         ip_netifs_t netifs;
-        /** Netifs safeyt lock.
-         */
+        /** Netifs safeyt lock. */
         fibril_rwlock_t netifs_lock;
-        /** Packet counter.
-         */
+        /** Packet counter. */
         uint16_t packet_counter;
-        /** Registered protocols.
-         */
+        /** Registered protocols. */
         ip_protos_t protos;
-        /** Protocols safety lock.
-         */
+        /** Protocols safety lock. */
         fibril_rwlock_t protos_lock;
 };

uspace/srv/net/il/ip/ip_module.c

@@ -32 +32 @@
 
 /** @file
- *  IP standalone module implementation.
- *  Contains skeleton module functions mapping.
- *  The functions are used by the module skeleton as module specific entry points.
- *  @see module.c
+ * IP standalone module implementation.
+ * Contains skeleton module functions mapping.
+ * The functions are used by the module skeleton as module specific entry
+ * points.
+ *
+ * @see module.c
  */
 
@@ -52 +54 @@
 #include "ip_module.h"
 
-/** IP module global data.
- */
+/** IP module global data. */
 extern ip_globals_t ip_globals;
 
-int il_module_message_standalone(ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count){
+int
+il_module_message_standalone(ipc_callid_t callid, ipc_call_t *call,
+    ipc_call_t *answer, int *answer_count)
+{
         return ip_message_standalone(callid, call, answer, answer_count);
 }
 
-int il_module_start_standalone(async_client_conn_t client_connection){
+int il_module_start_standalone(async_client_conn_t client_connection)
+{
         ERROR_DECLARE;
         
@@ -68 +73 @@
         
         ipcarg_t phonehash;
-        if (ERROR_OCCURRED(ip_initialize(client_connection))
-            || ERROR_OCCURRED(REGISTER_ME(SERVICE_IP, &phonehash))) {
+        if (ERROR_OCCURRED(ip_initialize(client_connection)) ||
+            ERROR_OCCURRED(REGISTER_ME(SERVICE_IP, &phonehash))) {
                 pm_destroy();
                 return ERROR_CODE;

uspace/srv/net/il/ip/ip_module.h

@@ -28 +28 @@
 
 /** @addtogroup ip
- *  @{
+ * @{
  */
 
 /** @file
- *  IP module functions.
- *  The functions are used as IP module entry points.
+ * IP module functions.
+ * The functions are used as IP module entry points.
  */
 
-#ifndef __NET_IP_MODULE_H__
-#define __NET_IP_MODULE_H__
+#ifndef NET_IP_MODULE_H_
+#define NET_IP_MODULE_H_
 
 #include <ipc/ipc.h>
 
-/** Initializes the IP module.
- *  @param[in] client_connection The client connection processing function. The module skeleton propagates its own one.
- *  @returns EOK on success.
- *  @returns ENOMEM if there is not enough memory left.
- */
-int ip_initialize(async_client_conn_t client_connection);
-
-/** Processes the IP message.
- *  @param[in] callid The message identifier.
- *  @param[in] call The message parameters.
- *  @param[out] answer The message answer parameters.
- *  @param[out] answer_count The last parameter for the actual answer in the answer parameter.
- *  @returns EOK on success.
- *  @returns ENOTSUP if the message is not known.
- *  @see ip_interface.h
- *  @see il_interface.h
- *  @see IS_NET_IP_MESSAGE()
- */
-int ip_message_standalone(ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count);
+extern int ip_initialize(async_client_conn_t);
+extern int ip_message_standalone(ipc_callid_t, ipc_call_t *, ipc_call_t *,
+    int *);
 
 #endif