Changeset 9e5a51c in mainline for uspace/lib/net/ieee80211/ieee80211.c

Timestamp:

2015-03-08T22:20:34Z (9 years ago)

Author:

Jan Kolarik <kolarik@…>

Branches:

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

Children:

864762a

Parents:

4cb0148

Message:

Fixed PLL initialization value that blocked communication with external devices. Started implementing IEEE802.11 scanning and authentication functions.

File:

• uspace/lib/net/ieee80211/ieee80211.c (modified) (6 diffs)

uspace/lib/net/ieee80211/ieee80211.c

@@ -42 +42 @@
 #include <ieee80211.h>
 
+/** Broadcast MAC address used to spread probe request through channel. */
+static const uint8_t ieee80211_broadcast_mac_addr[] = {
+        0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
+};
+
+/** IEEE 802.11 b/g supported data rates in units of 500 kb/s. */
+static const uint8_t ieee80211bg_data_rates[] = {
+        2, 4, 11, 12, 18, 22, 24, 36
+};
+
+/** IEEE 802.11 b/g extended supported data rates in units of 500 kb/s.
+ * 
+ *  These are defined separately, because probe request message can
+ *  only handle up to 8 data rates in supported rates IE. 
+ */
+static const uint8_t ieee80211bg_ext_data_rates[] = {
+        48, 72, 96, 108
+};
+
 /** Network interface options for IEEE 802.11 driver. */
 static nic_iface_t ieee80211_nic_iface;
@@ -47 +66 @@
 /** Basic driver operations for IEEE 802.11 NIC driver. */
 static driver_ops_t ieee80211_nic_driver_ops;
-
-bool ieee80211_is_data_frame(ieee80211_header_t *header)
-{
-        return (header->frame_ctrl & 
-                host2uint16_t_le(IEEE80211_FRAME_CTRL_FRAME_TYPE)) ==
-                host2uint16_t_le(IEEE80211_FRAME_CTRL_DATA_FRAME);
-}
 
 static int ieee80211_open(ddf_fun_t *fun)
@@ -70 +82 @@
                 return rc;
         
-        /*
         rc = ieee80211_dev->ops->scan(ieee80211_dev);
         if(rc != EOK)
                 return rc;
-         */
         
         return EOK;
@@ -93 +103 @@
         /* IEEE802.11 TX handler must be implemented. */
         if(!ieee80211_ops->tx_handler)
+                return EINVAL;
+        
+        /* IEEE802.11 set frequency handler must be implemented. */
+        if(!ieee80211_ops->set_freq)
                 return EINVAL;
         
@@ -119 +133 @@
         ieee80211_dev->current_op_mode = IEEE80211_OPMODE_STATION;
         
+        memcpy(ieee80211_dev->bssid_mask, ieee80211_broadcast_mac_addr, 
+                ETH_ADDR);
+        
         /* Bind NIC to device */
         nic_t *nic = nic_create_and_bind(ddf_dev);
@@ -175 +192 @@
 }
 
+static uint8_t ieee80211_freq_to_channel(uint16_t freq)
+{
+        return (freq - IEEE80211_FIRST_FREQ) / IEEE80211_CHANNEL_GAP + 1;
+}
+
+int ieee80211_probe_request(ieee80211_dev_t *ieee80211_dev)
+{
+        nic_t *nic = nic_get_from_ddf_dev(ieee80211_dev->ddf_dev);
+        nic_address_t nic_address;
+        nic_query_address(nic, &nic_address);
+        
+        size_t data_rates_size = 
+                sizeof(ieee80211bg_data_rates) / 
+                sizeof(ieee80211bg_data_rates[0]);
+        
+        size_t ext_data_rates_size = 
+                sizeof(ieee80211bg_ext_data_rates) / 
+                sizeof(ieee80211bg_ext_data_rates[0]);
+        
+        /* 3 headers - (rates, ext rates, current channel) and their data
+         * lengths + pad. 
+         */
+        size_t payload_size = 
+                sizeof(ieee80211_ie_header_t) * 3 +
+                data_rates_size + ext_data_rates_size + sizeof(uint8_t) + 2;
+        
+        size_t buffer_size = sizeof(ieee80211_mgmt_header_t) + payload_size;
+        void *buffer = malloc(buffer_size);
+        memset(buffer, 0, buffer_size);
+        
+        ieee80211_mgmt_header_t *mgmt_header = 
+                (ieee80211_mgmt_header_t *) buffer;
+        
+        mgmt_header->frame_ctrl = host2uint16_t_le(
+                IEEE80211_MGMT_FRAME | 
+                IEEE80211_MGMT_PROBE_REQ_FRAME
+                );
+        memcpy(mgmt_header->dest_addr, ieee80211_broadcast_mac_addr, ETH_ADDR);
+        memcpy(mgmt_header->src_addr, nic_address.address, ETH_ADDR);
+        memcpy(mgmt_header->bssid, ieee80211_broadcast_mac_addr, ETH_ADDR);
+        
+        /* Jump to payload -> header + padding. */
+        uint8_t *it = buffer + sizeof(ieee80211_mgmt_header_t) + 2;
+        
+        *it++ = IEEE80211_RATES_IE;
+        *it++ = data_rates_size;
+        memcpy(it, ieee80211bg_data_rates, data_rates_size);
+        it += data_rates_size;
+        
+        *it++ = IEEE80211_EXT_RATES_IE;
+        *it++ = ext_data_rates_size;
+        memcpy(it, ieee80211bg_ext_data_rates, ext_data_rates_size);
+        it += ext_data_rates_size;
+        
+        *it++ = IEEE80211_CHANNEL_IE;
+        *it++ = 1;
+        *it = ieee80211_freq_to_channel(ieee80211_dev->current_freq);
+        
+        ieee80211_dev->ops->tx_handler(ieee80211_dev, buffer, buffer_size);
+        
+        free(buffer);
+        
+        return EOK;
+}
+
+int ieee80211_probe_auth(ieee80211_dev_t *ieee80211_dev)
+{
+        uint8_t test_bssid[] = {0x14, 0xF6, 0x5A, 0xAF, 0x5E, 0xB7};
+        
+        nic_t *nic = nic_get_from_ddf_dev(ieee80211_dev->ddf_dev);
+        nic_address_t nic_address;
+        nic_query_address(nic, &nic_address);
+        
+        size_t buffer_size = sizeof(ieee80211_mgmt_header_t) + 
+                sizeof(ieee80211_auth_body_t);
+        void *buffer = malloc(buffer_size);
+        memset(buffer, 0, buffer_size);
+        
+        ieee80211_mgmt_header_t *mgmt_header = 
+                (ieee80211_mgmt_header_t *) buffer;
+        
+        mgmt_header->frame_ctrl = host2uint16_t_le(
+                IEEE80211_MGMT_FRAME | 
+                IEEE80211_MGMT_AUTH_FRAME
+                );
+        memcpy(mgmt_header->dest_addr, test_bssid, ETH_ADDR);
+        memcpy(mgmt_header->src_addr, nic_address.address, ETH_ADDR);
+        memcpy(mgmt_header->bssid, test_bssid, ETH_ADDR);
+        
+        ieee80211_auth_body_t *auth_body =
+                (ieee80211_auth_body_t *) 
+                (buffer + sizeof(ieee80211_mgmt_header_t));
+        auth_body->auth_alg = host2uint16_t_le(0);
+        auth_body->auth_trans_no = host2uint16_t_le(0);
+        
+        ieee80211_dev->ops->tx_handler(ieee80211_dev, buffer, buffer_size);
+        
+        free(buffer);
+        
+        return EOK;
+}
+
 /** @}
  */