source: mainline/uspace/srv/inet/inet_link.c@ fa101c4

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since fa101c4 was 0e94b979, checked in by Jiri Svoboda <jiri@…>, 14 years ago

Listing configured addresses.
  • Property mode set to 100644
File size: 6.8 KB
Line 
1/*
2 * Copyright (c) 2012 Jiri Svoboda
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup inet
30 * @{
31 */
32/**
33 * @file
34 * @brief
35 */
36
37#include <bool.h>
38#include <errno.h>
39#include <fibril_synch.h>
40#include <inet/iplink.h>
41#include <io/log.h>
42#include <loc.h>
43#include <stdlib.h>
44#include <str.h>
45
46#include "addrobj.h"
47#include "inet.h"
48#include "inet_link.h"
49#include "pdu.h"
50
51static int inet_link_open(service_id_t sid);
52static int inet_iplink_recv(iplink_t *ilink, iplink_sdu_t *sdu);
53
54static iplink_ev_ops_t inet_iplink_ev_ops = {
55 .recv = inet_iplink_recv
56};
57
58static LIST_INITIALIZE(inet_link_list);
59static FIBRIL_MUTEX_INITIALIZE(inet_discovery_lock);
60
61static int inet_iplink_recv(iplink_t *iplink, iplink_sdu_t *sdu)
62{
63 inet_packet_t packet;
64 int rc;
65
66 log_msg(LVL_DEBUG, "inet_iplink_recv()");
67 rc = inet_pdu_decode(sdu->data, sdu->size, &packet);
68 if (rc != EOK) {
69 log_msg(LVL_DEBUG, "failed decoding PDU");
70 return rc;
71 }
72
73 log_msg(LVL_DEBUG, "call inet_recv_packet()");
74 rc = inet_recv_packet(&packet);
75 log_msg(LVL_DEBUG, "call inet_recv_packet -> %d", rc);
76
77 return rc;
78}
79
80static int inet_link_check_new(void)
81{
82 bool already_known;
83 category_id_t iplink_cat;
84 service_id_t *svcs;
85 size_t count, i;
86 int rc;
87
88 fibril_mutex_lock(&inet_discovery_lock);
89
90 rc = loc_category_get_id("iplink", &iplink_cat, IPC_FLAG_BLOCKING);
91 if (rc != EOK) {
92 log_msg(LVL_ERROR, "Failed resolving category 'iplink'.");
93 fibril_mutex_unlock(&inet_discovery_lock);
94 return ENOENT;
95 }
96
97 rc = loc_category_get_svcs(iplink_cat, &svcs, &count);
98 if (rc != EOK) {
99 log_msg(LVL_ERROR, "Failed getting list of IP links.");
100 fibril_mutex_unlock(&inet_discovery_lock);
101 return EIO;
102 }
103
104 for (i = 0; i < count; i++) {
105 already_known = false;
106
107 list_foreach(inet_link_list, ilink_link) {
108 inet_link_t *ilink = list_get_instance(ilink_link,
109 inet_link_t, link_list);
110 if (ilink->svc_id == svcs[i]) {
111 already_known = true;
112 break;
113 }
114 }
115
116 if (!already_known) {
117 log_msg(LVL_DEBUG, "Found IP link '%lu'",
118 (unsigned long) svcs[i]);
119 rc = inet_link_open(svcs[i]);
120 if (rc != EOK)
121 log_msg(LVL_ERROR, "Could not open IP link.");
122 }
123 }
124
125 fibril_mutex_unlock(&inet_discovery_lock);
126 return EOK;
127}
128
129static inet_link_t *inet_link_new(void)
130{
131 inet_link_t *ilink = calloc(1, sizeof(inet_link_t));
132
133 if (ilink == NULL) {
134 log_msg(LVL_ERROR, "Failed allocating link structure. "
135 "Out of memory.");
136 return NULL;
137 }
138
139 link_initialize(&ilink->link_list);
140
141 return ilink;
142}
143
144static void inet_link_delete(inet_link_t *ilink)
145{
146 if (ilink->svc_name != NULL)
147 free(ilink->svc_name);
148 free(ilink);
149}
150
151static int inet_link_open(service_id_t sid)
152{
153 inet_link_t *ilink;
154 iplink_addr_t iaddr;
155 int rc;
156
157 log_msg(LVL_DEBUG, "inet_link_open()");
158 ilink = inet_link_new();
159 if (ilink == NULL)
160 return ENOMEM;
161
162 ilink->svc_id = sid;
163
164 rc = loc_service_get_name(sid, &ilink->svc_name);
165 if (rc != EOK) {
166 log_msg(LVL_ERROR, "Failed getting service name.");
167 goto error;
168 }
169
170 ilink->sess = loc_service_connect(EXCHANGE_SERIALIZE, sid, 0);
171 if (ilink->sess == NULL) {
172 log_msg(LVL_ERROR, "Failed connecting '%s'", ilink->svc_name);
173 goto error;
174 }
175
176 rc = iplink_open(ilink->sess, &inet_iplink_ev_ops, &ilink->iplink);
177 if (rc != EOK) {
178 log_msg(LVL_ERROR, "Failed opening IP link '%s'",
179 ilink->svc_name);
180 goto error;
181 }
182
183 log_msg(LVL_DEBUG, "Opened IP link '%s'", ilink->svc_name);
184 list_append(&ilink->link_list, &inet_link_list);
185
186 inet_addrobj_t *addr;
187
188 static int first = 1;
189 /* XXX For testing: set static IP address 192.168.0.4/24 */
190 addr = inet_addrobj_new();
191 if (first) {
192 addr->naddr.ipv4 = (127 << 24) + (0 << 16) + (0 << 8) + 1;
193 first = 0;
194 } else {
195 addr->naddr.ipv4 = (192 << 24) + (168 << 16) + (0 << 8) + 4;
196 }
197 addr->naddr.bits = 24;
198 addr->ilink = ilink;
199 addr->name = str_dup("v4a");
200 inet_addrobj_add(addr);
201
202 iaddr.ipv4 = addr->naddr.ipv4;
203 rc = iplink_addr_add(ilink->iplink, &iaddr);
204 if (rc != EOK) {
205 log_msg(LVL_ERROR, "Failed setting IP address on internet link.");
206 /* XXX Roll back */
207 return rc;
208 }
209
210 return EOK;
211
212error:
213 inet_link_delete(ilink);
214 return rc;
215}
216
217static void inet_link_cat_change_cb(void)
218{
219 (void) inet_link_check_new();
220}
221
222int inet_link_discovery_start(void)
223{
224 int rc;
225
226 rc = loc_register_cat_change_cb(inet_link_cat_change_cb);
227 if (rc != EOK) {
228 log_msg(LVL_ERROR, "Failed registering callback for IP link "
229 "discovery (%d).", rc);
230 return rc;
231 }
232
233 return inet_link_check_new();
234}
235
236/** Send datagram over Internet link */
237int inet_link_send_dgram(inet_link_t *ilink, inet_addr_t *lsrc,
238 inet_addr_t *ldest, inet_dgram_t *dgram, uint8_t proto, uint8_t ttl, int df)
239{
240 iplink_sdu_t sdu;
241 inet_packet_t packet;
242 int rc;
243
244 /* XXX Fragment packet */
245 packet.src = dgram->src;
246 packet.dest = dgram->dest;
247 packet.tos = dgram->tos;
248 packet.proto = proto;
249 packet.ttl = ttl;
250 packet.df = df;
251 packet.data = dgram->data;
252 packet.size = dgram->size;
253
254 sdu.lsrc.ipv4 = lsrc->ipv4;
255 sdu.ldest.ipv4 = ldest->ipv4;
256 rc = inet_pdu_encode(&packet, &sdu.data, &sdu.size);
257 if (rc != EOK)
258 return rc;
259
260 rc = iplink_send(ilink->iplink, &sdu);
261 free(sdu.data);
262
263 return rc;
264}
265
266inet_link_t *inet_link_get_by_id(sysarg_t link_id)
267{
268 fibril_mutex_lock(&inet_discovery_lock);
269
270 list_foreach(inet_link_list, elem) {
271 inet_link_t *ilink = list_get_instance(elem, inet_link_t,
272 link_list);
273
274 if (ilink->svc_id == link_id) {
275 fibril_mutex_unlock(&inet_discovery_lock);
276 return ilink;
277 }
278 }
279
280 fibril_mutex_unlock(&inet_discovery_lock);
281 return NULL;
282}
283
284/** @}
285 */
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