source: mainline/uspace/srv/net/inetsrv/inet_link.c@ f5f79cd

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since f5f79cd was 1d24ad3, checked in by Martin Decky <martin@…>, 12 years ago

more IPv6 stub code
  • Property mode set to 100644
File size: 8.7 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 <stdbool.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#include <net/socket_codes.h>
46#include "addrobj.h"
47#include "inetsrv.h"
48#include "inet_link.h"
49#include "pdu.h"
50
51static int inet_link_open(service_id_t);
52static int inet_iplink_recv(iplink_t *, iplink_recv_sdu_t *, uint16_t);
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_recv_sdu_t *sdu, uint16_t af)
62{
63 log_msg(LOG_DEFAULT, LVL_DEBUG, "inet_iplink_recv()");
64
65 int rc;
66 inet_packet_t packet;
67
68 switch (af) {
69 case AF_INET:
70 rc = inet_pdu_decode(sdu->data, sdu->size, &packet);
71 break;
72 case AF_INET6:
73 rc = inet_pdu_decode6(sdu->data, sdu->size, &packet);
74 break;
75 default:
76 log_msg(LOG_DEFAULT, LVL_DEBUG, "invalid address family");
77 return EINVAL;
78 }
79
80 if (rc != EOK) {
81 log_msg(LOG_DEFAULT, LVL_DEBUG, "failed decoding PDU");
82 return rc;
83 }
84
85 log_msg(LOG_DEFAULT, LVL_DEBUG, "call inet_recv_packet()");
86 rc = inet_recv_packet(&packet);
87 log_msg(LOG_DEFAULT, LVL_DEBUG, "call inet_recv_packet -> %d", rc);
88 free(packet.data);
89
90 return rc;
91}
92
93static int inet_link_check_new(void)
94{
95 bool already_known;
96 category_id_t iplink_cat;
97 service_id_t *svcs;
98 size_t count, i;
99 int rc;
100
101 fibril_mutex_lock(&inet_discovery_lock);
102
103 rc = loc_category_get_id("iplink", &iplink_cat, IPC_FLAG_BLOCKING);
104 if (rc != EOK) {
105 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed resolving category 'iplink'.");
106 fibril_mutex_unlock(&inet_discovery_lock);
107 return ENOENT;
108 }
109
110 rc = loc_category_get_svcs(iplink_cat, &svcs, &count);
111 if (rc != EOK) {
112 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed getting list of IP links.");
113 fibril_mutex_unlock(&inet_discovery_lock);
114 return EIO;
115 }
116
117 for (i = 0; i < count; i++) {
118 already_known = false;
119
120 list_foreach(inet_link_list, ilink_link) {
121 inet_link_t *ilink = list_get_instance(ilink_link,
122 inet_link_t, link_list);
123 if (ilink->svc_id == svcs[i]) {
124 already_known = true;
125 break;
126 }
127 }
128
129 if (!already_known) {
130 log_msg(LOG_DEFAULT, LVL_DEBUG, "Found IP link '%lu'",
131 (unsigned long) svcs[i]);
132 rc = inet_link_open(svcs[i]);
133 if (rc != EOK)
134 log_msg(LOG_DEFAULT, LVL_ERROR, "Could not open IP link.");
135 }
136 }
137
138 fibril_mutex_unlock(&inet_discovery_lock);
139 return EOK;
140}
141
142static inet_link_t *inet_link_new(void)
143{
144 inet_link_t *ilink = calloc(1, sizeof(inet_link_t));
145
146 if (ilink == NULL) {
147 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed allocating link structure. "
148 "Out of memory.");
149 return NULL;
150 }
151
152 link_initialize(&ilink->link_list);
153
154 return ilink;
155}
156
157static void inet_link_delete(inet_link_t *ilink)
158{
159 if (ilink->svc_name != NULL)
160 free(ilink->svc_name);
161 free(ilink);
162}
163
164static int inet_link_open(service_id_t sid)
165{
166 inet_link_t *ilink;
167 inet_addr_t iaddr;
168 int rc;
169
170 log_msg(LOG_DEFAULT, LVL_DEBUG, "inet_link_open()");
171 ilink = inet_link_new();
172 if (ilink == NULL)
173 return ENOMEM;
174
175 ilink->svc_id = sid;
176 ilink->iplink = NULL;
177
178 rc = loc_service_get_name(sid, &ilink->svc_name);
179 if (rc != EOK) {
180 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed getting service name.");
181 goto error;
182 }
183
184 ilink->sess = loc_service_connect(EXCHANGE_SERIALIZE, sid, 0);
185 if (ilink->sess == NULL) {
186 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed connecting '%s'", ilink->svc_name);
187 goto error;
188 }
189
190 rc = iplink_open(ilink->sess, &inet_iplink_ev_ops, &ilink->iplink);
191 if (rc != EOK) {
192 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed opening IP link '%s'",
193 ilink->svc_name);
194 goto error;
195 }
196
197 rc = iplink_get_mtu(ilink->iplink, &ilink->def_mtu);
198 if (rc != EOK) {
199 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed determinning MTU of link '%s'",
200 ilink->svc_name);
201 goto error;
202 }
203
204 log_msg(LOG_DEFAULT, LVL_DEBUG, "Opened IP link '%s'", ilink->svc_name);
205 list_append(&ilink->link_list, &inet_link_list);
206
207 inet_addrobj_t *addr;
208 inet_addrobj_t *addr6;
209
210 static int first = 1;
211
212 addr = inet_addrobj_new();
213 addr6 = inet_addrobj_new();
214
215 if (first) {
216 inet_naddr(&addr->naddr, 127, 0, 0, 1, 24);
217 inet_naddr6(&addr6->naddr, 0, 0, 0, 0, 0, 0, 0, 1, 128);
218 first = 0;
219 } else {
220 /*
221 * FIXME
222 * Setting static IP addresses for testing purposes
223 * 10.0.2.15/24
224 * fd19:1680::4/120
225 */
226 inet_naddr(&addr->naddr, 10, 0, 2, 15, 24);
227 inet_naddr6(&addr6->naddr, 0xfd19, 0x1680, 0, 0, 0, 0, 0, 4, 120);
228 }
229
230 addr->ilink = ilink;
231 addr6->ilink = ilink;
232 addr->name = str_dup("v4a");
233 addr6->name = str_dup("v6a");
234
235 rc = inet_addrobj_add(addr);
236 if (rc != EOK) {
237 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed adding IPv4 address.");
238 inet_addrobj_delete(addr);
239 /* XXX Roll back */
240 return rc;
241 }
242
243 rc = inet_addrobj_add(addr6);
244 if (rc != EOK) {
245 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed adding IPv6 address.");
246 inet_addrobj_delete(addr6);
247 /* XXX Roll back */
248 return rc;
249 }
250
251 inet_naddr_addr(&addr->naddr, &iaddr);
252 rc = iplink_addr_add(ilink->iplink, &iaddr);
253 if (rc != EOK) {
254 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed setting IPv4 address on internet link.");
255 inet_addrobj_remove(addr);
256 inet_addrobj_delete(addr);
257 /* XXX Roll back */
258 return rc;
259 }
260
261 inet_naddr_addr(&addr6->naddr, &iaddr);
262 rc = iplink_addr_add(ilink->iplink, &iaddr);
263 if (rc != EOK) {
264 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed setting IPv6 address on internet link.");
265 inet_addrobj_remove(addr6);
266 inet_addrobj_delete(addr6);
267 /* XXX Roll back */
268 return rc;
269 }
270
271 return EOK;
272
273error:
274 if (ilink->iplink != NULL)
275 iplink_close(ilink->iplink);
276
277 inet_link_delete(ilink);
278 return rc;
279}
280
281static void inet_link_cat_change_cb(void)
282{
283 (void) inet_link_check_new();
284}
285
286int inet_link_discovery_start(void)
287{
288 int rc;
289
290 rc = loc_register_cat_change_cb(inet_link_cat_change_cb);
291 if (rc != EOK) {
292 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed registering callback for IP link "
293 "discovery (%d).", rc);
294 return rc;
295 }
296
297 return inet_link_check_new();
298}
299
300/** Send datagram over Internet link */
301int inet_link_send_dgram(inet_link_t *ilink, inet_addr_t *lsrc,
302 inet_addr_t *ldest, inet_dgram_t *dgram, uint8_t proto, uint8_t ttl, int df)
303{
304 /*
305 * Fill packet structure. Fragmentation is performed by
306 * inet_pdu_encode().
307 */
308
309 inet_packet_t packet;
310
311 packet.src = dgram->src;
312 packet.dest = dgram->dest;
313 packet.tos = dgram->tos;
314 packet.proto = proto;
315 packet.ttl = ttl;
316 packet.df = df;
317 packet.data = dgram->data;
318 packet.size = dgram->size;
319
320 iplink_sdu_t sdu;
321 size_t offs = 0;
322 int rc;
323
324 sdu.src = *lsrc;
325 sdu.dest = *ldest;
326
327 do {
328 /* Encode one fragment */
329 size_t roffs;
330 rc = inet_pdu_encode(&packet, offs, ilink->def_mtu, &sdu.data,
331 &sdu.size, &roffs);
332 if (rc != EOK)
333 return rc;
334
335 /* Send the PDU */
336 rc = iplink_send(ilink->iplink, &sdu);
337 free(sdu.data);
338
339 offs = roffs;
340 } while (offs < packet.size);
341
342 return rc;
343}
344
345inet_link_t *inet_link_get_by_id(sysarg_t link_id)
346{
347 fibril_mutex_lock(&inet_discovery_lock);
348
349 list_foreach(inet_link_list, elem) {
350 inet_link_t *ilink = list_get_instance(elem, inet_link_t,
351 link_list);
352
353 if (ilink->svc_id == link_id) {
354 fibril_mutex_unlock(&inet_discovery_lock);
355 return ilink;
356 }
357 }
358
359 fibril_mutex_unlock(&inet_discovery_lock);
360 return NULL;
361}
362
363/** @}
364 */
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