source: mainline/uspace/srv/net/ethip/ethip_nic.c@ f0a2720

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since f0a2720 was 1038a9c, checked in by Martin Decky <martin@…>, 13 years ago

cstyle (no change in functionality)
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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
35 */
36
37#include <adt/list.h>
38#include <async.h>
39#include <bool.h>
40#include <errno.h>
41#include <fibril_synch.h>
42#include <inet/iplink_srv.h>
43#include <io/log.h>
44#include <loc.h>
45#include <device/nic.h>
46#include <stdlib.h>
47
48#include "ethip.h"
49#include "ethip_nic.h"
50#include "pdu.h"
51
52static int ethip_nic_open(service_id_t sid);
53static void ethip_nic_cb_conn(ipc_callid_t iid, ipc_call_t *icall, void *arg);
54
55static LIST_INITIALIZE(ethip_nic_list);
56static FIBRIL_MUTEX_INITIALIZE(ethip_discovery_lock);
57
58static int ethip_nic_check_new(void)
59{
60 bool already_known;
61 category_id_t iplink_cat;
62 service_id_t *svcs;
63 size_t count, i;
64 int rc;
65
66 fibril_mutex_lock(&ethip_discovery_lock);
67
68 rc = loc_category_get_id("nic", &iplink_cat, IPC_FLAG_BLOCKING);
69 if (rc != EOK) {
70 log_msg(LVL_ERROR, "Failed resolving category 'nic'.");
71 fibril_mutex_unlock(&ethip_discovery_lock);
72 return ENOENT;
73 }
74
75 rc = loc_category_get_svcs(iplink_cat, &svcs, &count);
76 if (rc != EOK) {
77 log_msg(LVL_ERROR, "Failed getting list of IP links.");
78 fibril_mutex_unlock(&ethip_discovery_lock);
79 return EIO;
80 }
81
82 for (i = 0; i < count; i++) {
83 already_known = false;
84
85 list_foreach(ethip_nic_list, nic_link) {
86 ethip_nic_t *nic = list_get_instance(nic_link,
87 ethip_nic_t, nic_list);
88 if (nic->svc_id == svcs[i]) {
89 already_known = true;
90 break;
91 }
92 }
93
94 if (!already_known) {
95 log_msg(LVL_DEBUG, "Found NIC '%lu'",
96 (unsigned long) svcs[i]);
97 rc = ethip_nic_open(svcs[i]);
98 if (rc != EOK)
99 log_msg(LVL_ERROR, "Could not open NIC.");
100 }
101 }
102
103 fibril_mutex_unlock(&ethip_discovery_lock);
104 return EOK;
105}
106
107static ethip_nic_t *ethip_nic_new(void)
108{
109 ethip_nic_t *nic = calloc(1, sizeof(ethip_nic_t));
110
111 if (nic == NULL) {
112 log_msg(LVL_ERROR, "Failed allocating NIC structure. "
113 "Out of memory.");
114 return NULL;
115 }
116
117 link_initialize(&nic->nic_list);
118 list_initialize(&nic->addr_list);
119
120 return nic;
121}
122
123static ethip_link_addr_t *ethip_nic_addr_new(iplink_srv_addr_t *addr)
124{
125 ethip_link_addr_t *laddr = calloc(1, sizeof(ethip_link_addr_t));
126
127 if (laddr == NULL) {
128 log_msg(LVL_ERROR, "Failed allocating NIC address structure. "
129 "Out of memory.");
130 return NULL;
131 }
132
133 link_initialize(&laddr->addr_list);
134 laddr->addr.ipv4 = addr->ipv4;
135 return laddr;
136}
137
138static void ethip_nic_delete(ethip_nic_t *nic)
139{
140 if (nic->svc_name != NULL)
141 free(nic->svc_name);
142 free(nic);
143}
144
145static void ethip_link_addr_delete(ethip_link_addr_t *laddr)
146{
147 free(laddr);
148}
149
150static int ethip_nic_open(service_id_t sid)
151{
152 bool in_list = false;
153 nic_address_t nic_address;
154
155 log_msg(LVL_DEBUG, "ethip_nic_open()");
156 ethip_nic_t *nic = ethip_nic_new();
157 if (nic == NULL)
158 return ENOMEM;
159
160 int rc = loc_service_get_name(sid, &nic->svc_name);
161 if (rc != EOK) {
162 log_msg(LVL_ERROR, "Failed getting service name.");
163 goto error;
164 }
165
166 nic->sess = loc_service_connect(EXCHANGE_SERIALIZE, sid, 0);
167 if (nic->sess == NULL) {
168 log_msg(LVL_ERROR, "Failed connecting '%s'", nic->svc_name);
169 goto error;
170 }
171
172 nic->svc_id = sid;
173
174 rc = nic_callback_create(nic->sess, ethip_nic_cb_conn, nic);
175 if (rc != EOK) {
176 log_msg(LVL_ERROR, "Failed creating callback connection "
177 "from '%s'", nic->svc_name);
178 goto error;
179 }
180
181 log_msg(LVL_DEBUG, "Opened NIC '%s'", nic->svc_name);
182 list_append(&nic->nic_list, &ethip_nic_list);
183 in_list = true;
184
185 rc = ethip_iplink_init(nic);
186 if (rc != EOK)
187 goto error;
188
189 rc = nic_get_address(nic->sess, &nic_address);
190 if (rc != EOK) {
191 log_msg(LVL_ERROR, "Error getting MAC address of NIC '%s'.",
192 nic->svc_name);
193 goto error;
194 }
195
196 mac48_decode(nic_address.address, &nic->mac_addr);
197
198 rc = nic_set_state(nic->sess, NIC_STATE_ACTIVE);
199 if (rc != EOK) {
200 log_msg(LVL_ERROR, "Error activating NIC '%s'.",
201 nic->svc_name);
202 goto error;
203 }
204
205 log_msg(LVL_DEBUG, "Initialized IP link service, MAC = 0x%" PRIx64,
206 nic->mac_addr.addr);
207
208 return EOK;
209
210error:
211 if (in_list)
212 list_remove(&nic->nic_list);
213 if (nic->sess != NULL)
214 async_hangup(nic->sess);
215 ethip_nic_delete(nic);
216 return rc;
217}
218
219static void ethip_nic_cat_change_cb(void)
220{
221 (void) ethip_nic_check_new();
222}
223
224static void ethip_nic_addr_changed(ethip_nic_t *nic, ipc_callid_t callid,
225 ipc_call_t *call)
226{
227 log_msg(LVL_DEBUG, "ethip_nic_addr_changed()");
228 async_answer_0(callid, ENOTSUP);
229}
230
231static void ethip_nic_received(ethip_nic_t *nic, ipc_callid_t callid,
232 ipc_call_t *call)
233{
234 int rc;
235 void *data;
236 size_t size;
237
238 log_msg(LVL_DEBUG, "ethip_nic_received() nic=%p", nic);
239
240 rc = async_data_write_accept(&data, false, 0, 0, 0, &size);
241 if (rc != EOK) {
242 log_msg(LVL_DEBUG, "data_write_accept() failed");
243 return;
244 }
245
246 log_msg(LVL_DEBUG, "Ethernet PDU contents (%zu bytes)",
247 size);
248
249 log_msg(LVL_DEBUG, "call ethip_received");
250 rc = ethip_received(&nic->iplink, data, size);
251 log_msg(LVL_DEBUG, "free data");
252 free(data);
253
254 log_msg(LVL_DEBUG, "ethip_nic_received() done, rc=%d", rc);
255 async_answer_0(callid, rc);
256}
257
258static void ethip_nic_device_state(ethip_nic_t *nic, ipc_callid_t callid,
259 ipc_call_t *call)
260{
261 log_msg(LVL_DEBUG, "ethip_nic_device_state()");
262 async_answer_0(callid, ENOTSUP);
263}
264
265static void ethip_nic_cb_conn(ipc_callid_t iid, ipc_call_t *icall, void *arg)
266{
267 ethip_nic_t *nic = (ethip_nic_t *)arg;
268
269 log_msg(LVL_DEBUG, "ethnip_nic_cb_conn()");
270
271 while (true) {
272 ipc_call_t call;
273 ipc_callid_t callid = async_get_call(&call);
274
275 if (!IPC_GET_IMETHOD(call)) {
276 /* TODO: Handle hangup */
277 return;
278 }
279
280 switch (IPC_GET_IMETHOD(call)) {
281 case NIC_EV_ADDR_CHANGED:
282 ethip_nic_addr_changed(nic, callid, &call);
283 break;
284 case NIC_EV_RECEIVED:
285 ethip_nic_received(nic, callid, &call);
286 break;
287 case NIC_EV_DEVICE_STATE:
288 ethip_nic_device_state(nic, callid, &call);
289 break;
290 default:
291 async_answer_0(callid, ENOTSUP);
292 }
293 }
294}
295
296int ethip_nic_discovery_start(void)
297{
298 int rc = loc_register_cat_change_cb(ethip_nic_cat_change_cb);
299 if (rc != EOK) {
300 log_msg(LVL_ERROR, "Failed registering callback for NIC "
301 "discovery (%d).", rc);
302 return rc;
303 }
304
305 return ethip_nic_check_new();
306}
307
308ethip_nic_t *ethip_nic_find_by_iplink_sid(service_id_t iplink_sid)
309{
310 log_msg(LVL_DEBUG, "ethip_nic_find_by_iplink_sid(%u)",
311 (unsigned) iplink_sid);
312
313 list_foreach(ethip_nic_list, link) {
314 log_msg(LVL_DEBUG, "ethip_nic_find_by_iplink_sid - element");
315 ethip_nic_t *nic = list_get_instance(link, ethip_nic_t,
316 nic_list);
317
318 if (nic->iplink_sid == iplink_sid) {
319 log_msg(LVL_DEBUG, "ethip_nic_find_by_iplink_sid - found %p", nic);
320 return nic;
321 }
322 }
323
324 log_msg(LVL_DEBUG, "ethip_nic_find_by_iplink_sid - not found");
325 return NULL;
326}
327
328int ethip_nic_send(ethip_nic_t *nic, void *data, size_t size)
329{
330 int rc;
331 log_msg(LVL_DEBUG, "ethip_nic_send(size=%zu)", size);
332 rc = nic_send_frame(nic->sess, data, size);
333 log_msg(LVL_DEBUG, "nic_send_frame -> %d", rc);
334 return rc;
335}
336
337int ethip_nic_addr_add(ethip_nic_t *nic, iplink_srv_addr_t *addr)
338{
339 ethip_link_addr_t *laddr;
340
341 log_msg(LVL_DEBUG, "ethip_nic_addr_add()");
342 laddr = ethip_nic_addr_new(addr);
343 if (laddr == NULL)
344 return ENOMEM;
345
346 list_append(&laddr->addr_list, &nic->addr_list);
347 return EOK;
348}
349
350int ethip_nic_addr_remove(ethip_nic_t *nic, iplink_srv_addr_t *addr)
351{
352 ethip_link_addr_t *laddr;
353
354 log_msg(LVL_DEBUG, "ethip_nic_addr_remove()");
355
356 laddr = ethip_nic_addr_find(nic, addr);
357 if (laddr == NULL)
358 return ENOENT;
359
360 list_remove(&laddr->addr_list);
361 ethip_link_addr_delete(laddr);
362 return EOK;
363}
364
365ethip_link_addr_t *ethip_nic_addr_find(ethip_nic_t *nic,
366 iplink_srv_addr_t *addr)
367{
368 log_msg(LVL_DEBUG, "ethip_nic_addr_find()");
369
370 list_foreach(nic->addr_list, link) {
371 ethip_link_addr_t *laddr = list_get_instance(link,
372 ethip_link_addr_t, addr_list);
373
374 if (addr->ipv4 == laddr->addr.ipv4)
375 return laddr;
376 }
377
378 return NULL;
379}
380
381/** @}
382 */
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