source: mainline/uspace/srv/net/ethip/ethip.c

Last change on this file was ca48672, checked in by Jiri Svoboda <jiri@…>, 4 weeks ago

loc_service_register() needs to take a port ID argument.
  • Property mode set to 100644
File size: 8.3 KB
Line 
1/*
2 * Copyright (c) 2025 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/eth_addr.h>
42#include <inet/iplink_srv.h>
43#include <io/log.h>
44#include <loc.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <task.h>
48#include "arp.h"
49#include "ethip.h"
50#include "ethip_nic.h"
51#include "pdu.h"
52#include "std.h"
53
54#define NAME "ethip"
55
56static errno_t ethip_open(iplink_srv_t *srv);
57static errno_t ethip_close(iplink_srv_t *srv);
58static errno_t ethip_send(iplink_srv_t *srv, iplink_sdu_t *sdu);
59static errno_t ethip_send6(iplink_srv_t *srv, iplink_sdu6_t *sdu);
60static errno_t ethip_get_mtu(iplink_srv_t *srv, size_t *mtu);
61static errno_t ethip_get_mac48(iplink_srv_t *srv, eth_addr_t *mac);
62static errno_t ethip_set_mac48(iplink_srv_t *srv, eth_addr_t *mac);
63static errno_t ethip_addr_add(iplink_srv_t *srv, inet_addr_t *addr);
64static errno_t ethip_addr_remove(iplink_srv_t *srv, inet_addr_t *addr);
65
66static void ethip_client_conn(ipc_call_t *icall, void *arg);
67
68static iplink_ops_t ethip_iplink_ops = {
69 .open = ethip_open,
70 .close = ethip_close,
71 .send = ethip_send,
72 .send6 = ethip_send6,
73 .get_mtu = ethip_get_mtu,
74 .get_mac48 = ethip_get_mac48,
75 .set_mac48 = ethip_set_mac48,
76 .addr_add = ethip_addr_add,
77 .addr_remove = ethip_addr_remove
78};
79
80static loc_srv_t *ethip_srv;
81
82static errno_t ethip_init(void)
83{
84 async_set_fallback_port_handler(ethip_client_conn, NULL);
85
86 errno_t rc = loc_server_register(NAME, &ethip_srv);
87 if (rc != EOK) {
88 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed registering server.");
89 return rc;
90 }
91
92 rc = ethip_nic_discovery_start();
93 if (rc != EOK)
94 return rc;
95
96 return EOK;
97}
98
99errno_t ethip_iplink_init(ethip_nic_t *nic)
100{
101 errno_t rc;
102 service_id_t sid;
103 category_id_t iplink_cat;
104 static unsigned link_num = 0;
105 char *svc_name = NULL;
106
107 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_iplink_init()");
108
109 iplink_srv_init(&nic->iplink);
110 nic->iplink.ops = &ethip_iplink_ops;
111 nic->iplink.arg = nic;
112
113 if (asprintf(&svc_name, "net/eth%u", ++link_num) < 0) {
114 log_msg(LOG_DEFAULT, LVL_ERROR, "Out of memory.");
115 rc = ENOMEM;
116 goto error;
117 }
118
119 rc = loc_service_register(ethip_srv, svc_name, fallback_port_id, &sid);
120 if (rc != EOK) {
121 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed registering service %s.", svc_name);
122 goto error;
123 }
124
125 nic->iplink_sid = sid;
126
127 rc = loc_category_get_id("iplink", &iplink_cat, IPC_FLAG_BLOCKING);
128 if (rc != EOK) {
129 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed resolving category 'iplink'.");
130 goto error;
131 }
132
133 rc = loc_service_add_to_cat(ethip_srv, sid, iplink_cat);
134 if (rc != EOK) {
135 log_msg(LOG_DEFAULT, LVL_ERROR, "Failed adding %s to category.", svc_name);
136 goto error;
137 }
138
139 return EOK;
140
141error:
142 if (svc_name != NULL)
143 free(svc_name);
144 return rc;
145}
146
147static void ethip_client_conn(ipc_call_t *icall, void *arg)
148{
149 ethip_nic_t *nic;
150 service_id_t sid;
151
152 sid = (service_id_t) ipc_get_arg2(icall);
153 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_client_conn(%u)", (unsigned)sid);
154 nic = ethip_nic_find_by_iplink_sid(sid);
155 if (nic == NULL) {
156 log_msg(LOG_DEFAULT, LVL_WARN, "Uknown service ID.");
157 return;
158 }
159
160 iplink_conn(icall, &nic->iplink);
161}
162
163static errno_t ethip_open(iplink_srv_t *srv)
164{
165 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_open()");
166 return EOK;
167}
168
169static errno_t ethip_close(iplink_srv_t *srv)
170{
171 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_close()");
172 return EOK;
173}
174
175static errno_t ethip_send(iplink_srv_t *srv, iplink_sdu_t *sdu)
176{
177 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_send()");
178
179 ethip_nic_t *nic = (ethip_nic_t *) srv->arg;
180 eth_frame_t frame;
181
182 errno_t rc = arp_translate(nic, sdu->src, sdu->dest, &frame.dest);
183 if (rc != EOK) {
184 log_msg(LOG_DEFAULT, LVL_WARN, "Failed to look up IPv4 address 0x%"
185 PRIx32, sdu->dest);
186 return rc;
187 }
188
189 frame.src = nic->mac_addr;
190 frame.etype_len = ETYPE_IP;
191 frame.data = sdu->data;
192 frame.size = sdu->size;
193
194 void *data;
195 size_t size;
196 rc = eth_pdu_encode(&frame, &data, &size);
197 if (rc != EOK)
198 return rc;
199
200 rc = ethip_nic_send(nic, data, size);
201 free(data);
202
203 return rc;
204}
205
206static errno_t ethip_send6(iplink_srv_t *srv, iplink_sdu6_t *sdu)
207{
208 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_send6()");
209
210 ethip_nic_t *nic = (ethip_nic_t *) srv->arg;
211 eth_frame_t frame;
212
213 frame.dest = sdu->dest;
214 frame.src = nic->mac_addr;
215 frame.etype_len = ETYPE_IPV6;
216 frame.data = sdu->data;
217 frame.size = sdu->size;
218
219 void *data;
220 size_t size;
221 errno_t rc = eth_pdu_encode(&frame, &data, &size);
222 if (rc != EOK)
223 return rc;
224
225 rc = ethip_nic_send(nic, data, size);
226 free(data);
227
228 return rc;
229}
230
231errno_t ethip_received(iplink_srv_t *srv, void *data, size_t size)
232{
233 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_received(): srv=%p", srv);
234 ethip_nic_t *nic = (ethip_nic_t *) srv->arg;
235
236 log_msg(LOG_DEFAULT, LVL_DEBUG, " - eth_pdu_decode");
237
238 eth_frame_t frame;
239 errno_t rc = eth_pdu_decode(data, size, &frame);
240 if (rc != EOK) {
241 log_msg(LOG_DEFAULT, LVL_DEBUG, " - eth_pdu_decode failed");
242 return rc;
243 }
244
245 iplink_recv_sdu_t sdu;
246
247 switch (frame.etype_len) {
248 case ETYPE_ARP:
249 arp_received(nic, &frame);
250 break;
251 case ETYPE_IP:
252 log_msg(LOG_DEFAULT, LVL_DEBUG, " - construct SDU");
253 sdu.data = frame.data;
254 sdu.size = frame.size;
255 log_msg(LOG_DEFAULT, LVL_DEBUG, " - call iplink_ev_recv");
256 rc = iplink_ev_recv(&nic->iplink, &sdu, ip_v4);
257 break;
258 case ETYPE_IPV6:
259 log_msg(LOG_DEFAULT, LVL_DEBUG, " - construct SDU IPv6");
260 sdu.data = frame.data;
261 sdu.size = frame.size;
262 log_msg(LOG_DEFAULT, LVL_DEBUG, " - call iplink_ev_recv");
263 rc = iplink_ev_recv(&nic->iplink, &sdu, ip_v6);
264 break;
265 default:
266 log_msg(LOG_DEFAULT, LVL_DEBUG, "Unknown ethertype 0x%" PRIx16,
267 frame.etype_len);
268 }
269
270 free(frame.data);
271 return rc;
272}
273
274static errno_t ethip_get_mtu(iplink_srv_t *srv, size_t *mtu)
275{
276 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_get_mtu()");
277 *mtu = 1500;
278 return EOK;
279}
280
281static errno_t ethip_get_mac48(iplink_srv_t *srv, eth_addr_t *mac)
282{
283 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_get_mac48()");
284
285 ethip_nic_t *nic = (ethip_nic_t *) srv->arg;
286 *mac = nic->mac_addr;
287
288 return EOK;
289}
290
291static errno_t ethip_set_mac48(iplink_srv_t *srv, eth_addr_t *mac)
292{
293 log_msg(LOG_DEFAULT, LVL_DEBUG, "ethip_set_mac48()");
294
295 ethip_nic_t *nic = (ethip_nic_t *) srv->arg;
296 nic->mac_addr = *mac;
297
298 return EOK;
299}
300
301static errno_t ethip_addr_add(iplink_srv_t *srv, inet_addr_t *addr)
302{
303 ethip_nic_t *nic = (ethip_nic_t *) srv->arg;
304
305 return ethip_nic_addr_add(nic, addr);
306}
307
308static errno_t ethip_addr_remove(iplink_srv_t *srv, inet_addr_t *addr)
309{
310 ethip_nic_t *nic = (ethip_nic_t *) srv->arg;
311
312 return ethip_nic_addr_remove(nic, addr);
313}
314
315int main(int argc, char *argv[])
316{
317 errno_t rc;
318
319 printf(NAME ": HelenOS IP over Ethernet service\n");
320
321 if (log_init(NAME) != EOK) {
322 printf(NAME ": Failed to initialize logging.\n");
323 return 1;
324 }
325
326 rc = ethip_init();
327 if (rc != EOK)
328 return 1;
329
330 printf(NAME ": Accepting connections.\n");
331 task_retval(0);
332 async_manager();
333
334 /* Not reached */
335 return 0;
336}
337
338/** @}
339 */
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