source: mainline/uspace/srv/net/inetsrv/inet_link.c@ bf9e6fc

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since bf9e6fc was bf9e6fc, checked in by Jiri Svoboda <jiri@…>, 13 years ago

Detect duplicate address names.
  • Property mode set to 100644
File size: 7.5 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 "inetsrv.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 free(packet.data);
77
78 return rc;
79}
80
81static int inet_link_check_new(void)
82{
83 bool already_known;
84 category_id_t iplink_cat;
85 service_id_t *svcs;
86 size_t count, i;
87 int rc;
88
89 fibril_mutex_lock(&inet_discovery_lock);
90
91 rc = loc_category_get_id("iplink", &iplink_cat, IPC_FLAG_BLOCKING);
92 if (rc != EOK) {
93 log_msg(LVL_ERROR, "Failed resolving category 'iplink'.");
94 fibril_mutex_unlock(&inet_discovery_lock);
95 return ENOENT;
96 }
97
98 rc = loc_category_get_svcs(iplink_cat, &svcs, &count);
99 if (rc != EOK) {
100 log_msg(LVL_ERROR, "Failed getting list of IP links.");
101 fibril_mutex_unlock(&inet_discovery_lock);
102 return EIO;
103 }
104
105 for (i = 0; i < count; i++) {
106 already_known = false;
107
108 list_foreach(inet_link_list, ilink_link) {
109 inet_link_t *ilink = list_get_instance(ilink_link,
110 inet_link_t, link_list);
111 if (ilink->svc_id == svcs[i]) {
112 already_known = true;
113 break;
114 }
115 }
116
117 if (!already_known) {
118 log_msg(LVL_DEBUG, "Found IP link '%lu'",
119 (unsigned long) svcs[i]);
120 rc = inet_link_open(svcs[i]);
121 if (rc != EOK)
122 log_msg(LVL_ERROR, "Could not open IP link.");
123 }
124 }
125
126 fibril_mutex_unlock(&inet_discovery_lock);
127 return EOK;
128}
129
130static inet_link_t *inet_link_new(void)
131{
132 inet_link_t *ilink = calloc(1, sizeof(inet_link_t));
133
134 if (ilink == NULL) {
135 log_msg(LVL_ERROR, "Failed allocating link structure. "
136 "Out of memory.");
137 return NULL;
138 }
139
140 link_initialize(&ilink->link_list);
141
142 return ilink;
143}
144
145static void inet_link_delete(inet_link_t *ilink)
146{
147 if (ilink->svc_name != NULL)
148 free(ilink->svc_name);
149 free(ilink);
150}
151
152static int inet_link_open(service_id_t sid)
153{
154 inet_link_t *ilink;
155 iplink_addr_t iaddr;
156 int rc;
157
158 log_msg(LVL_DEBUG, "inet_link_open()");
159 ilink = inet_link_new();
160 if (ilink == NULL)
161 return ENOMEM;
162
163 ilink->svc_id = sid;
164 ilink->iplink = NULL;
165
166 rc = loc_service_get_name(sid, &ilink->svc_name);
167 if (rc != EOK) {
168 log_msg(LVL_ERROR, "Failed getting service name.");
169 goto error;
170 }
171
172 ilink->sess = loc_service_connect(EXCHANGE_SERIALIZE, sid, 0);
173 if (ilink->sess == NULL) {
174 log_msg(LVL_ERROR, "Failed connecting '%s'", ilink->svc_name);
175 goto error;
176 }
177
178 rc = iplink_open(ilink->sess, &inet_iplink_ev_ops, &ilink->iplink);
179 if (rc != EOK) {
180 log_msg(LVL_ERROR, "Failed opening IP link '%s'",
181 ilink->svc_name);
182 goto error;
183 }
184
185 rc = iplink_get_mtu(ilink->iplink, &ilink->def_mtu);
186 if (rc != EOK) {
187 log_msg(LVL_ERROR, "Failed determinning MTU of link '%s'",
188 ilink->svc_name);
189 goto error;
190 }
191
192 log_msg(LVL_DEBUG, "Opened IP link '%s'", ilink->svc_name);
193 list_append(&ilink->link_list, &inet_link_list);
194
195 inet_addrobj_t *addr;
196
197 static int first = 1;
198 /* XXX For testing: set static IP address 192.168.0.4/24 */
199 addr = inet_addrobj_new();
200 if (first) {
201 addr->naddr.ipv4 = (127 << 24) + (0 << 16) + (0 << 8) + 1;
202 first = 0;
203 } else {
204 addr->naddr.ipv4 = (192 << 24) + (168 << 16) + (0 << 8) + 4;
205 }
206 addr->naddr.bits = 24;
207 addr->ilink = ilink;
208 addr->name = str_dup("v4a");
209 rc = inet_addrobj_add(addr);
210 if (rc != EOK) {
211 log_msg(LVL_ERROR, "Failed setting IP address on internet link.");
212 inet_addrobj_delete(addr);
213 /* XXX Roll back */
214 return rc;
215 }
216
217 iaddr.ipv4 = addr->naddr.ipv4;
218 rc = iplink_addr_add(ilink->iplink, &iaddr);
219 if (rc != EOK) {
220 log_msg(LVL_ERROR, "Failed setting IP address on internet link.");
221 inet_addrobj_remove(addr);
222 inet_addrobj_delete(addr);
223 /* XXX Roll back */
224 return rc;
225 }
226
227 return EOK;
228
229error:
230 if (ilink->iplink != NULL)
231 iplink_close(ilink->iplink);
232 inet_link_delete(ilink);
233 return rc;
234}
235
236static void inet_link_cat_change_cb(void)
237{
238 (void) inet_link_check_new();
239}
240
241int inet_link_discovery_start(void)
242{
243 int rc;
244
245 rc = loc_register_cat_change_cb(inet_link_cat_change_cb);
246 if (rc != EOK) {
247 log_msg(LVL_ERROR, "Failed registering callback for IP link "
248 "discovery (%d).", rc);
249 return rc;
250 }
251
252 return inet_link_check_new();
253}
254
255/** Send datagram over Internet link */
256int inet_link_send_dgram(inet_link_t *ilink, inet_addr_t *lsrc,
257 inet_addr_t *ldest, inet_dgram_t *dgram, uint8_t proto, uint8_t ttl, int df)
258{
259 iplink_sdu_t sdu;
260 inet_packet_t packet;
261 int rc;
262 size_t offs, roffs;
263
264 /*
265 * Fill packet structure. Fragmentation is performed by
266 * inet_pdu_encode().
267 */
268 packet.src = dgram->src;
269 packet.dest = dgram->dest;
270 packet.tos = dgram->tos;
271 packet.proto = proto;
272 packet.ttl = ttl;
273 packet.df = df;
274 packet.data = dgram->data;
275 packet.size = dgram->size;
276
277 sdu.lsrc.ipv4 = lsrc->ipv4;
278 sdu.ldest.ipv4 = ldest->ipv4;
279
280 offs = 0;
281 do {
282 /* Encode one fragment */
283 rc = inet_pdu_encode(&packet, offs, ilink->def_mtu, &sdu.data,
284 &sdu.size, &roffs);
285 if (rc != EOK)
286 return rc;
287
288 /* Send the PDU */
289 rc = iplink_send(ilink->iplink, &sdu);
290 free(sdu.data);
291
292 offs = roffs;
293 } while (offs < packet.size);
294
295 return rc;
296}
297
298inet_link_t *inet_link_get_by_id(sysarg_t link_id)
299{
300 fibril_mutex_lock(&inet_discovery_lock);
301
302 list_foreach(inet_link_list, elem) {
303 inet_link_t *ilink = list_get_instance(elem, inet_link_t,
304 link_list);
305
306 if (ilink->svc_id == link_id) {
307 fibril_mutex_unlock(&inet_discovery_lock);
308 return ilink;
309 }
310 }
311
312 fibril_mutex_unlock(&inet_discovery_lock);
313 return NULL;
314}
315
316/** @}
317 */
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