source: mainline/uspace/srv/net/ethip/ethip.c@ 1e3ea91

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 1e3ea91 was 289cb7dd, checked in by Jiri Svoboda <jiri@…>, 12 years ago

Do not fill in bogus address in lsrc/ldest for received iplink PDUs. We could reverse-translate them, but we don't use them for anything.
  • Property mode set to 100644
File size: 7.0 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 ethip
30 * @{
31 */
32/**
33 * @file
34 * @brief IP link provider for Ethernet
35 *
36 * Based on the IETF RFC 894 standard.
37 */
38
39#include <async.h>
40#include <errno.h>
41#include <inet/iplink_srv.h>
42#include <io/log.h>
43#include <loc.h>
44#include <stdio.h>
45#include <stdlib.h>
46
47#include "arp.h"
48#include "ethip.h"
49#include "ethip_nic.h"
50#include "pdu.h"
51#include "std.h"
52
53#define NAME "ethip"
54
55static int ethip_open(iplink_srv_t *srv);
56static int ethip_close(iplink_srv_t *srv);
57static int ethip_send(iplink_srv_t *srv, iplink_srv_sdu_t *sdu);
58static int ethip_get_mtu(iplink_srv_t *srv, size_t *mtu);
59static int ethip_addr_add(iplink_srv_t *srv, iplink_srv_addr_t *addr);
60static int ethip_addr_remove(iplink_srv_t *srv, iplink_srv_addr_t *addr);
61
62static void ethip_client_conn(ipc_callid_t iid, ipc_call_t *icall, void *arg);
63
64static iplink_ops_t ethip_iplink_ops = {
65 .open = ethip_open,
66 .close = ethip_close,
67 .send = ethip_send,
68 .get_mtu = ethip_get_mtu,
69 .addr_add = ethip_addr_add,
70 .addr_remove = ethip_addr_remove
71};
72
73static int ethip_init(void)
74{
75 async_set_client_connection(ethip_client_conn);
76
77 int rc = loc_server_register(NAME);
78 if (rc != EOK) {
79 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed registering server.");
80 return rc;
81 }
82
83 rc = ethip_nic_discovery_start();
84 if (rc != EOK)
85 return rc;
86
87 return EOK;
88}
89
90int ethip_iplink_init(ethip_nic_t *nic)
91{
92 int rc;
93 service_id_t sid;
94 category_id_t iplink_cat;
95 static unsigned link_num = 0;
96 char *svc_name = NULL;
97
98 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_iplink_init()");
99
100 iplink_srv_init(&nic->iplink);
101 nic->iplink.ops = &ethip_iplink_ops;
102 nic->iplink.arg = nic;
103
104 rc = asprintf(&svc_name, "net/eth%u", ++link_num);
105 if (rc < 0) {
106 log_msg(LOG_DEFAULT, LVL_ERROR, "Out of memory.");
107 goto error;
108 }
109
110 rc = loc_service_register(svc_name, &sid);
111 if (rc != EOK) {
112 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed registering service %s.", svc_name);
113 goto error;
114 }
115
116 nic->iplink_sid = sid;
117
118 rc = loc_category_get_id("iplink", &iplink_cat, IPC_FLAG_BLOCKING);
119 if (rc != EOK) {
120 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed resolving category 'iplink'.");
121 goto error;
122 }
123
124 rc = loc_service_add_to_cat(sid, iplink_cat);
125 if (rc != EOK) {
126 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed adding %s to category.", svc_name);
127 goto error;
128 }
129
130 return EOK;
131
132error:
133 if (svc_name != NULL)
134 free(svc_name);
135 return rc;
136}
137
138static void ethip_client_conn(ipc_callid_t iid, ipc_call_t *icall, void *arg)
139{
140 ethip_nic_t *nic;
141 service_id_t sid;
142
143 sid = (service_id_t)IPC_GET_ARG1(*icall);
144 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_client_conn(%u)", (unsigned)sid);
145 nic = ethip_nic_find_by_iplink_sid(sid);
146 if (nic == NULL) {
147 log_msg(LOG_DEFAULT, LVL_WARN, "Uknown service ID.");
148 return;
149 }
150
151 iplink_conn(iid, icall, &nic->iplink);
152}
153
154static int ethip_open(iplink_srv_t *srv)
155{
156 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_open()");
157 return EOK;
158}
159
160static int ethip_close(iplink_srv_t *srv)
161{
162 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_close()");
163 return EOK;
164}
165
166static int ethip_send(iplink_srv_t *srv, iplink_srv_sdu_t *sdu)
167{
168 ethip_nic_t *nic = (ethip_nic_t *)srv->arg;
169 eth_frame_t frame;
170 void *data;
171 size_t size;
172 mac48_addr_t dest_mac_addr;
173 int rc;
174
175 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_send()");
176
177 rc = arp_translate(nic, &sdu->lsrc, &sdu->ldest, &dest_mac_addr);
178 if (rc != EOK) {
179 log_msg(LOG_DEFAULT, LVL_WARN, "Failed to look up IP address 0x%" PRIx32,
180 sdu->ldest.ipv4);
181 return rc;
182 }
183
184 frame.dest = dest_mac_addr;
185 frame.src = nic->mac_addr;
186 frame.etype_len = ETYPE_IP;
187 frame.data = sdu->data;
188 frame.size = sdu->size;
189
190 rc = eth_pdu_encode(&frame, &data, &size);
191 if (rc != EOK)
192 return rc;
193
194 rc = ethip_nic_send(nic, data, size);
195 free(data);
196
197 return rc;
198}
199
200int ethip_received(iplink_srv_t *srv, void *data, size_t size)
201{
202 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_received(): srv=%p", srv);
203 ethip_nic_t *nic = (ethip_nic_t *)srv->arg;
204 eth_frame_t frame;
205 iplink_srv_sdu_t sdu;
206 int rc;
207
208 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_received()");
209
210 log_msg(LOG_DEFAULT, LVL_DEBUG, " - eth_pdu_decode");
211 rc = eth_pdu_decode(data, size, &frame);
212 if (rc != EOK) {
213 log_msg(LOG_DEFAULT, LVL_DEBUG, " - eth_pdu_decode failed");
214 return rc;
215 }
216
217 switch (frame.etype_len) {
218 case ETYPE_ARP:
219 arp_received(nic, &frame);
220 break;
221 case ETYPE_IP:
222 log_msg(LOG_DEFAULT, LVL_DEBUG, " - construct SDU");
223 sdu.lsrc.ipv4 = 0;
224 sdu.ldest.ipv4 = 0;
225 sdu.data = frame.data;
226 sdu.size = frame.size;
227 log_msg(LOG_DEFAULT, LVL_DEBUG, " - call iplink_ev_recv");
228 rc = iplink_ev_recv(&nic->iplink, &sdu);
229 break;
230 default:
231 log_msg(LOG_DEFAULT, LVL_DEBUG, "Unknown ethertype 0x%" PRIx16,
232 frame.etype_len);
233 }
234
235 free(frame.data);
236 return rc;
237}
238
239static int ethip_get_mtu(iplink_srv_t *srv, size_t *mtu)
240{
241 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_get_mtu()");
242 *mtu = 1500;
243 return EOK;
244}
245
246static int ethip_addr_add(iplink_srv_t *srv, iplink_srv_addr_t *addr)
247{
248 ethip_nic_t *nic = (ethip_nic_t *)srv->arg;
249
250 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_addr_add(0x%" PRIx32 ")", addr->ipv4);
251 return ethip_nic_addr_add(nic, addr);
252}
253
254static int ethip_addr_remove(iplink_srv_t *srv, iplink_srv_addr_t *addr)
255{
256 ethip_nic_t *nic = (ethip_nic_t *)srv->arg;
257
258 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_addr_remove(0x%" PRIx32 ")", addr->ipv4);
259 return ethip_nic_addr_add(nic, addr);
260}
261
262int main(int argc, char *argv[])
263{
264 int rc;
265
266 printf(NAME ": HelenOS IP over Ethernet service\n");
267
268 if (log_init(NAME) != EOK) {
269 printf(NAME ": Failed to initialize logging.\n");
270 return 1;
271 }
272
273 rc = ethip_init();
274 if (rc != EOK)
275 return 1;
276
277 printf(NAME ": Accepting connections.\n");
278 task_retval(0);
279 async_manager();
280
281 /* Not reached */
282 return 0;
283}
284
285/** @}
286 */
Note: See TracBrowser for help on using the repository browser.