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ad02a0eb SH |
1 | /***************************************************************************** |
2 | Copyright (c) 2006 EMC Corporation. | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify it | |
5 | under the terms of the GNU General Public License as published by the Free | |
6 | Software Foundation; either version 2 of the License, or (at your option) | |
7 | any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License along with | |
15 | this program; if not, write to the Free Software Foundation, Inc., 59 | |
16 | Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | ||
18 | The full GNU General Public License is included in this distribution in the | |
19 | file called LICENSE. | |
20 | ||
21 | Authors: Srinivas Aji <Aji_Srinivas@emc.com> | |
22 | ||
23 | ******************************************************************************/ | |
24 | ||
25 | #include "bridge_ctl.h" | |
26 | #include "netif_utils.h" | |
f2592588 | 27 | #include "packet.h" |
ad02a0eb SH |
28 | |
29 | #include <unistd.h> | |
30 | #include <net/if.h> | |
f2592588 | 31 | #include <stdlib.h> |
ad02a0eb SH |
32 | #include <linux/if_bridge.h> |
33 | #include <arpa/inet.h> | |
34 | #include <sys/types.h> | |
35 | ||
36 | #include <bitmap.h> | |
37 | #include <uid_stp.h> | |
38 | #include <stp_bpdu.h> | |
39 | #include <stp_in.h> | |
40 | #include <stp_to.h> | |
41 | ||
42 | #include <stdio.h> | |
43 | #include <string.h> | |
44 | ||
45 | #include "log.h" | |
46 | ||
ad02a0eb SH |
47 | /*------------------------------------------------------------*/ |
48 | ||
11904a35 SH |
49 | struct ifdata { |
50 | int if_index; | |
51 | struct ifdata *next; | |
52 | int up; | |
53 | char name[IFNAMSIZ]; | |
54 | ||
55 | int is_bridge; | |
56 | /* If bridge */ | |
57 | struct ifdata *bridge_next; | |
58 | struct ifdata *port_list; | |
59 | int do_stp; | |
60 | int stp_up; | |
61 | struct stp_instance *stp; | |
62 | UID_BRIDGE_ID_T bridge_id; | |
63 | /* Bridge config */ | |
64 | UID_STP_MODE_T stp_enabled; | |
65 | int bridge_priority; | |
66 | int max_age; | |
67 | int hello_time; | |
68 | int forward_delay; | |
69 | int force_version; | |
70 | int hold_time; | |
71 | ||
72 | /* If port */ | |
73 | int speed; | |
74 | int duplex; | |
75 | struct ifdata *master; | |
76 | struct ifdata *port_next; | |
77 | /* STP port index */ | |
78 | int port_index; | |
79 | /* STP port config */ | |
80 | int port_priority; | |
81 | int admin_port_path_cost; | |
82 | ADMIN_P2P_T admin_point2point; | |
83 | unsigned char admin_edge; | |
84 | unsigned char admin_non_stp; /* 1- doesn't participate in STP, 1 - regular */ | |
f2592588 SH |
85 | |
86 | struct epoll_event_handler event; | |
ad02a0eb SH |
87 | }; |
88 | ||
89 | /* Instances */ | |
90 | struct ifdata *current_br = NULL; | |
91 | ||
92 | void instance_begin(struct ifdata *br) | |
93 | { | |
11904a35 SH |
94 | if (current_br) { |
95 | ERROR("BUG: Trying to set instance over existing instance."); | |
96 | ERROR("%d", *(int *)0); /* ABORT */ | |
97 | } | |
98 | current_br = br; | |
99 | STP_IN_instance_begin(br->stp); | |
ad02a0eb SH |
100 | } |
101 | ||
102 | void instance_end(void) | |
103 | { | |
11904a35 SH |
104 | STP_IN_instance_end(current_br->stp); |
105 | current_br = NULL; | |
ad02a0eb SH |
106 | } |
107 | ||
108 | struct ifdata *find_port(int port_index) | |
109 | { | |
11904a35 SH |
110 | struct ifdata *ifc = current_br->port_list; |
111 | while (ifc && ifc->port_index != port_index) | |
112 | ifc = ifc->port_next; | |
113 | return ifc; | |
ad02a0eb SH |
114 | } |
115 | ||
ad02a0eb SH |
116 | /*************************************************************/ |
117 | /* Bridge and port defaults */ | |
118 | ||
119 | UID_STP_CFG_T default_bridge_stp_cfg = { | |
11904a35 SH |
120 | .field_mask = BR_CFG_ALL, |
121 | .bridge_priority = DEF_BR_PRIO, | |
122 | .max_age = DEF_BR_MAXAGE, | |
123 | .hello_time = DEF_BR_HELLOT, | |
124 | .forward_delay = DEF_BR_FWDELAY, | |
125 | .force_version = DEF_FORCE_VERS, /*NORMAL_RSTP */ | |
ad02a0eb SH |
126 | }; |
127 | ||
11904a35 | 128 | void update_bridge_stp_config(struct ifdata *br, UID_STP_CFG_T * cfg) |
ad02a0eb | 129 | { |
11904a35 SH |
130 | if (cfg->field_mask & BR_CFG_PRIO) |
131 | br->bridge_priority = cfg->bridge_priority; | |
132 | if (cfg->field_mask & BR_CFG_AGE) | |
133 | br->max_age = cfg->max_age; | |
134 | if (cfg->field_mask & BR_CFG_HELLO) | |
135 | br->hello_time = cfg->hello_time; | |
136 | if (cfg->field_mask & BR_CFG_DELAY) | |
137 | br->forward_delay = cfg->forward_delay; | |
138 | if (cfg->field_mask & BR_CFG_FORCE_VER) | |
139 | br->force_version = cfg->force_version; | |
ad02a0eb SH |
140 | } |
141 | ||
142 | UID_STP_PORT_CFG_T default_port_stp_cfg = { | |
11904a35 SH |
143 | .field_mask = PT_CFG_ALL, |
144 | .port_priority = DEF_PORT_PRIO, | |
145 | .admin_non_stp = DEF_ADMIN_NON_STP, | |
146 | .admin_edge = False, // DEF_ADMIN_EDGE, | |
147 | .admin_port_path_cost = ADMIN_PORT_PATH_COST_AUTO, | |
148 | .admin_point2point = DEF_P2P, | |
ad02a0eb SH |
149 | }; |
150 | ||
11904a35 | 151 | void update_port_stp_config(struct ifdata *ifc, UID_STP_PORT_CFG_T * cfg) |
ad02a0eb | 152 | { |
11904a35 SH |
153 | if (cfg->field_mask & PT_CFG_PRIO) |
154 | ifc->port_priority = cfg->port_priority; | |
155 | if (cfg->field_mask & PT_CFG_NON_STP) | |
156 | ifc->admin_non_stp = cfg->admin_non_stp; | |
157 | if (cfg->field_mask & PT_CFG_EDGE) | |
158 | ifc->admin_edge = cfg->admin_edge; | |
159 | if (cfg->field_mask & PT_CFG_COST) | |
160 | ifc->admin_port_path_cost = cfg->admin_port_path_cost; | |
161 | if (cfg->field_mask & PT_CFG_P2P) | |
162 | ifc->admin_point2point = cfg->admin_point2point; | |
ad02a0eb SH |
163 | } |
164 | ||
165 | /**************************************************************/ | |
166 | ||
167 | int add_port_stp(struct ifdata *ifc) | |
11904a35 | 168 | { /* Bridge is ifc->master */ |
11904a35 SH |
169 | TST((ifc->port_index = get_bridge_portno(ifc->name)) >= 0, -1); |
170 | ||
171 | /* Add port to STP */ | |
172 | instance_begin(ifc->master); | |
173 | int r = STP_IN_port_create(0, ifc->port_index); | |
174 | if (r == 0) { /* Update bridge ID */ | |
175 | UID_STP_STATE_T state; | |
176 | STP_IN_stpm_get_state(0, &state); | |
177 | ifc->master->bridge_id = state.bridge_id; | |
178 | } | |
179 | instance_end(); | |
180 | if (r /* check for failure */ ) { | |
181 | ERROR("Couldn't add port for ifindex %d to STP", ifc->if_index); | |
182 | return -1; | |
183 | } | |
184 | return 0; | |
ad02a0eb SH |
185 | } |
186 | ||
187 | void remove_port_stp(struct ifdata *ifc) | |
188 | { | |
11904a35 SH |
189 | /* Remove port from STP */ |
190 | instance_begin(ifc->master); | |
191 | int r = STP_IN_port_delete(0, ifc->port_index); | |
192 | instance_end(); | |
193 | ifc->port_index = -1; | |
194 | if (r != 0) { | |
195 | ERROR("removing port %s failed for bridge %s: %s", | |
196 | ifc->name, ifc->master->name, | |
197 | STP_IN_get_error_explanation(r)); | |
198 | } | |
ad02a0eb SH |
199 | } |
200 | ||
201 | int init_rstplib_instance(struct ifdata *br) | |
202 | { | |
11904a35 SH |
203 | br->stp = STP_IN_instance_create(); |
204 | if (br->stp == NULL) { | |
205 | ERROR("Couldn't create STP instance for bridge %s", br->name); | |
206 | return -1; | |
207 | } | |
ad02a0eb | 208 | |
11904a35 SH |
209 | BITMAP_T ports; |
210 | BitmapClear(&ports); | |
211 | instance_begin(br); | |
212 | int r = STP_IN_stpm_create(0, br->name, &ports); | |
213 | instance_end(); | |
214 | if (r != 0) { | |
215 | ERROR("stpm create failed for bridge %s: %s", | |
216 | br->name, STP_IN_get_error_explanation(r)); | |
217 | return -1; | |
218 | } | |
ad02a0eb | 219 | |
11904a35 | 220 | return 0; |
ad02a0eb SH |
221 | } |
222 | ||
223 | void clear_rstplib_instance(struct ifdata *br) | |
224 | { | |
11904a35 SH |
225 | instance_begin(br); |
226 | int r = STP_IN_delete_all(); | |
227 | instance_end(); | |
228 | if (r != 0) { | |
229 | ERROR("stpm delete failed for bridge %s: %s", | |
230 | br->name, STP_IN_get_error_explanation(r)); | |
231 | } | |
232 | ||
233 | STP_IN_instance_delete(br->stp); | |
234 | br->stp = NULL; | |
ad02a0eb SH |
235 | } |
236 | ||
237 | int init_bridge_stp(struct ifdata *br) | |
238 | { | |
11904a35 SH |
239 | if (br->stp_up) { |
240 | ERROR("STP already started"); | |
241 | return 0; | |
242 | } | |
243 | ||
244 | /* Init STP state */ | |
245 | TST(init_rstplib_instance(br) == 0, -1); | |
246 | ||
247 | struct ifdata *p = br->port_list; | |
248 | while (p) { | |
249 | if (add_port_stp(p) != 0) | |
250 | break; | |
251 | p = p->port_next; | |
252 | } | |
253 | if (p) { | |
254 | struct ifdata *q = br->port_list; | |
255 | while (q != p) { | |
256 | remove_port_stp(q); | |
257 | q = q->port_next; | |
258 | } | |
259 | /* Clear bridge STP state */ | |
260 | clear_rstplib_instance(br); | |
261 | return -1; | |
262 | } | |
263 | br->stp_up = 1; | |
264 | return 0; | |
ad02a0eb SH |
265 | } |
266 | ||
267 | void clear_bridge_stp(struct ifdata *br) | |
268 | { | |
11904a35 SH |
269 | if (!br->stp_up) |
270 | return; | |
271 | br->stp_up = 0; | |
272 | struct ifdata *p = br->port_list; | |
273 | while (p) { | |
274 | remove_port_stp(p); | |
275 | p = p->port_next; | |
276 | } | |
277 | /* Clear bridge STP state */ | |
278 | clear_rstplib_instance(br); | |
ad02a0eb SH |
279 | } |
280 | ||
ad02a0eb SH |
281 | struct ifdata *if_head = NULL; |
282 | struct ifdata *br_head = NULL; | |
283 | ||
284 | struct ifdata *find_if(int if_index) | |
285 | { | |
11904a35 SH |
286 | struct ifdata *p = if_head; |
287 | while (p && p->if_index != if_index) | |
288 | p = p->next; | |
289 | return p; | |
ad02a0eb SH |
290 | } |
291 | ||
292 | #define ADD_TO_LIST(_list, _next, _ifc) \ | |
293 | do { \ | |
294 | (_ifc)->_next = (_list); \ | |
295 | (_list) = (_ifc); \ | |
296 | } while (0) | |
297 | ||
298 | #define REMOVE_FROM_LIST(_list, _next, _ifc, _error_fmt, _args...) \ | |
299 | do { \ | |
300 | struct ifdata **_prev = &(_list); \ | |
301 | while (*_prev && *_prev != (_ifc)) \ | |
302 | _prev = &(*_prev)->_next; \ | |
303 | if (*_prev != (_ifc)) \ | |
304 | ERROR(_error_fmt, ##_args); \ | |
305 | else \ | |
306 | *_prev = (_ifc)->_next; \ | |
307 | } while (0) | |
308 | ||
309 | /* Caller ensures that there isn't any ifdata with this index */ | |
310 | /* If br is NULL, new interface is a bridge, else it is a port of br */ | |
311 | struct ifdata *create_if(int if_index, struct ifdata *br) | |
312 | { | |
11904a35 SH |
313 | struct ifdata *p; |
314 | TST((p = malloc(sizeof(*p))) != NULL, NULL); | |
315 | ||
f2592588 SH |
316 | memset(p, 0, sizeof(*p)); |
317 | ||
11904a35 SH |
318 | /* Init fields */ |
319 | p->if_index = if_index; | |
320 | p->is_bridge = (br == NULL); | |
f2592588 SH |
321 | |
322 | /* TODO: purge use of name, due to issue with renameing */ | |
11904a35 | 323 | if_indextoname(if_index, p->name); |
f2592588 | 324 | |
11904a35 SH |
325 | if (p->is_bridge) { |
326 | INFO("Add bridge %s", p->name); | |
327 | /* Init slave list */ | |
328 | p->port_list = NULL; | |
329 | ||
330 | p->do_stp = 0; | |
331 | p->up = 0; | |
332 | p->stp_up = 0; | |
333 | p->stp = NULL; | |
334 | update_bridge_stp_config(p, &default_bridge_stp_cfg); | |
335 | ADD_TO_LIST(br_head, bridge_next, p); /* Add to bridge list */ | |
336 | } else { | |
337 | INFO("Add iface %s to bridge %s", p->name, br->name); | |
338 | p->up = 0; | |
339 | p->speed = 0; | |
340 | p->duplex = 0; | |
341 | p->master = br; | |
f2592588 | 342 | |
11904a35 SH |
343 | update_port_stp_config(p, &default_port_stp_cfg); |
344 | ADD_TO_LIST(br->port_list, port_next, p); /* Add to bridge port list */ | |
f2592588 | 345 | |
11904a35 SH |
346 | if (br->stp_up) { |
347 | add_port_stp(p); | |
348 | } | |
349 | } | |
f2592588 | 350 | |
11904a35 SH |
351 | /* Add to interface list */ |
352 | ADD_TO_LIST(if_head, next, p); | |
353 | ||
354 | return p; | |
ad02a0eb SH |
355 | } |
356 | ||
357 | void delete_if(struct ifdata *ifc) | |
358 | { | |
11904a35 SH |
359 | INFO("Delete iface %s", ifc->name); |
360 | if (ifc->is_bridge) { /* Bridge: */ | |
361 | /* Stop STP */ | |
362 | clear_bridge_stp(ifc); | |
363 | /* Delete ports */ | |
364 | while (ifc->port_list) | |
365 | delete_if(ifc->port_list); | |
366 | /* Remove from bridge list */ | |
367 | REMOVE_FROM_LIST(br_head, bridge_next, ifc, | |
368 | "Can't find interface ifindex %d bridge list", | |
369 | ifc->if_index); | |
370 | } else { /* Port */ | |
371 | if (ifc->master->stp_up) | |
372 | remove_port_stp(ifc); | |
373 | /* Remove from bridge port list */ | |
374 | REMOVE_FROM_LIST(ifc->master->port_list, port_next, ifc, | |
375 | "Can't find interface ifindex %d on br %d's port list", | |
376 | ifc->if_index, ifc->master->if_index); | |
377 | } | |
f2592588 | 378 | |
11904a35 SH |
379 | /* Remove from bridge interface list */ |
380 | REMOVE_FROM_LIST(if_head, next, ifc, | |
381 | "Can't find interface ifindex %d on iflist", | |
382 | ifc->if_index); | |
f2592588 | 383 | free(ifc); |
ad02a0eb SH |
384 | } |
385 | ||
358260ff SH |
386 | static int stp_enabled(struct ifdata *br) |
387 | { | |
388 | char path[40 + IFNAMSIZ]; | |
389 | sprintf(path, "/sys/class/net/%s/bridge/stp_state", br->name); | |
390 | FILE *f = fopen(path, "r"); | |
391 | if (!f) { | |
392 | LOG("Open %s failed", path); | |
393 | return 0; | |
394 | } | |
395 | int enabled = 0; | |
396 | fscanf(f, "%d", &enabled); | |
397 | fclose(f); | |
398 | INFO("STP on %s state %d", br->name, enabled); | |
399 | ||
400 | return enabled == 2; /* ie user mode STP */ | |
401 | } | |
402 | ||
ad02a0eb SH |
403 | void set_br_up(struct ifdata *br, int up) |
404 | { | |
358260ff SH |
405 | int stp_up = stp_enabled(br); |
406 | INFO("%s was %s stp was %s", br->name,up ? "up" : "down", br->stp_up ? "up" : "down"); | |
407 | INFO("Set bridge %s %s stp %s" , br->name, | |
408 | up ? "up" : "down", stp_up ? "up" : "down"); | |
409 | ||
410 | if (up != br->up) | |
11904a35 | 411 | br->up = up; |
358260ff SH |
412 | |
413 | if (br->stp_up != stp_up) { | |
414 | if (stp_up) | |
415 | init_bridge_stp(br); | |
416 | else | |
417 | clear_bridge_stp(br); | |
11904a35 | 418 | } |
ad02a0eb SH |
419 | } |
420 | ||
421 | void set_if_up(struct ifdata *ifc, int up) | |
422 | { | |
11904a35 SH |
423 | INFO("Port %s : %s", ifc->name, (up ? "up" : "down")); |
424 | int speed = -1; | |
425 | int duplex = -1; | |
426 | int notify_flags = 0; | |
427 | const int NOTIFY_UP = 1, NOTIFY_SPEED = 2, NOTIFY_DUPLEX = 4; | |
428 | if (!up) { /* Down */ | |
429 | if (ifc->up) { | |
430 | ifc->up = up; | |
431 | notify_flags |= NOTIFY_UP; | |
432 | } | |
433 | } else { /* Up */ | |
434 | int r = ethtool_get_speed_duplex(ifc->name, &speed, &duplex); | |
435 | if (r < 0) { /* Didn't succeed */ | |
436 | } | |
437 | if (speed < 0) | |
438 | speed = 10; | |
439 | if (duplex < 0) | |
440 | duplex = 0; /* Assume half duplex */ | |
441 | ||
442 | if (speed != ifc->speed) { | |
443 | ifc->speed = speed; | |
444 | notify_flags |= NOTIFY_SPEED; | |
445 | } | |
446 | if (duplex != ifc->duplex) { | |
447 | ifc->duplex = duplex; | |
448 | notify_flags |= NOTIFY_DUPLEX; | |
449 | } | |
450 | if (!ifc->up) { | |
451 | ifc->up = 1; | |
452 | notify_flags |= NOTIFY_UP; | |
453 | } | |
454 | } | |
455 | if (notify_flags && ifc->master->stp_up) { | |
456 | instance_begin(ifc->master); | |
457 | ||
458 | if (notify_flags & NOTIFY_SPEED) | |
459 | STP_IN_changed_port_speed(ifc->port_index, speed); | |
460 | if (notify_flags & NOTIFY_DUPLEX) | |
461 | STP_IN_changed_port_duplex(ifc->port_index); | |
462 | if (notify_flags & NOTIFY_UP) | |
463 | STP_IN_enable_port(ifc->port_index, ifc->up); | |
464 | ||
465 | instance_end(); | |
466 | } | |
ad02a0eb SH |
467 | } |
468 | ||
469 | /*------------------------------------------------------------*/ | |
470 | ||
471 | int bridge_notify(int br_index, int if_index, int newlink, int up) | |
472 | { | |
11904a35 SH |
473 | if (up) |
474 | up = 1; | |
475 | LOG("br_index %d, if_index %d, up %d", br_index, if_index, up); | |
476 | ||
477 | struct ifdata *br = NULL; | |
478 | if (br_index >= 0) { | |
479 | br = find_if(br_index); | |
480 | if (br && !br->is_bridge) { | |
481 | ERROR | |
482 | ("Notification shows non bridge interface %d as bridge.", | |
483 | br_index); | |
484 | return -1; | |
485 | } | |
486 | if (!br) | |
487 | br = create_if(br_index, NULL); | |
488 | if (!br) { | |
489 | ERROR("Couldn't create data for bridge interface %d", | |
490 | br_index); | |
491 | return -1; | |
492 | } | |
493 | /* Bridge must be up if we get such notifications */ | |
494 | if (!br->up) | |
495 | set_br_up(br, 1); | |
496 | } | |
497 | ||
498 | struct ifdata *ifc = find_if(if_index); | |
499 | ||
500 | if (br) { | |
501 | if (ifc) { | |
502 | if (ifc->is_bridge) { | |
503 | ERROR | |
504 | ("Notification shows bridge interface %d as slave of %d", | |
505 | if_index, br_index); | |
506 | return -1; | |
507 | } | |
508 | if (ifc->master != br) { | |
509 | INFO("Device %d has come to bridge %d. " | |
510 | "Missed notify for deletion from bridge %d", | |
511 | if_index, br_index, ifc->master->if_index); | |
512 | delete_if(ifc); | |
513 | ifc = NULL; | |
514 | } | |
515 | } | |
516 | if (!ifc) | |
517 | ifc = create_if(if_index, br); | |
518 | if (!ifc) { | |
519 | ERROR | |
520 | ("Couldn't create data for interface %d (master %d)", | |
521 | if_index, br_index); | |
522 | return -1; | |
523 | } | |
524 | if (!newlink && !is_bridge_slave(br->name, ifc->name)) { | |
525 | /* brctl delif generates a DELLINK, but so does ifconfig <slave> down. | |
526 | So check and delete if it has been removed. | |
527 | */ | |
528 | delete_if(ifc); | |
529 | return 0; | |
530 | } | |
531 | if (ifc->up != up) | |
532 | set_if_up(ifc, up); /* And speed and duplex */ | |
533 | } else { /* No br_index */ | |
534 | if (!newlink) { | |
535 | /* DELLINK not from bridge means interface unregistered. */ | |
536 | /* Cleanup removed bridge or removed bridge slave */ | |
537 | if (ifc) | |
538 | delete_if(ifc); | |
539 | return 0; | |
540 | } else { /* This may be a new link */ | |
541 | if (!ifc) { | |
542 | char ifname[IFNAMSIZ]; | |
543 | if (if_indextoname(if_index, ifname) | |
544 | && is_bridge(ifname)) { | |
545 | ifc = create_if(if_index, NULL); | |
546 | if (!ifc) { | |
547 | ERROR | |
548 | ("Couldn't create data for bridge interface %d", | |
549 | if_index); | |
550 | return -1; | |
551 | } | |
552 | } | |
553 | } | |
554 | if (ifc && !ifc->is_bridge && | |
555 | !is_bridge_slave(ifc->master->name, ifc->name)) { | |
556 | /* Interface might have left bridge and we might have missed deletion */ | |
557 | delete_if(ifc); | |
558 | return 0; | |
559 | } | |
560 | if (ifc && ifc->up != up) { | |
561 | if (ifc->is_bridge) | |
562 | set_br_up(ifc, up); | |
563 | else | |
564 | set_if_up(ifc, up); | |
565 | } | |
566 | } | |
567 | } | |
568 | return 0; | |
ad02a0eb SH |
569 | } |
570 | ||
96e20123 | 571 | void bridge_bpdu_rcv(int if_index, const unsigned char *data, int len) |
ad02a0eb | 572 | { |
96e20123 | 573 | struct ifdata *ifc = find_if(if_index); |
358260ff | 574 | BPDU_T *bpdu = (BPDU_T *) (data + sizeof(MAC_HEADER_T)); |
f2592588 | 575 | |
96e20123 SH |
576 | LOG("ifindex %d, len %d", if_index, len); |
577 | if (!ifc) | |
578 | return; | |
579 | ||
358260ff SH |
580 | TST(ifc->up,); |
581 | TST(ifc->master->stp_up,); | |
582 | TST(len > sizeof(MAC_HEADER_T) + sizeof(ETH_HEADER_T) + sizeof(BPDU_HEADER_T),); | |
f2592588 | 583 | |
11904a35 | 584 | /* Do some validation */ |
358260ff SH |
585 | if (bpdu->hdr.protocol[0] || bpdu->hdr.protocol[1]) |
586 | return; | |
587 | ||
588 | switch (bpdu->hdr.bpdu_type) { | |
11904a35 SH |
589 | case BPDU_RSTP: |
590 | TST(len >= 36,); | |
591 | case BPDU_CONFIG_TYPE: | |
592 | TST(len >= 35,); | |
593 | /* 802.1w doesn't ask for this */ | |
594 | // TST(ntohs(*(uint16_t*)bpdu.body.message_age) | |
595 | // < ntohs(*(uint16_t*)bpdu.body.max_age), ); | |
358260ff SH |
596 | TST(memcmp(bpdu->body.bridge_id, &ifc->master->bridge_id, 8) != 0 |
597 | || (ntohs(*(uint16_t *) bpdu->body.port_id) & 0xfff) != | |
11904a35 SH |
598 | ifc->port_index,); |
599 | break; | |
600 | case BPDU_TOPO_CHANGE_TYPE: | |
601 | break; | |
602 | default: | |
358260ff SH |
603 | LOG("Receive unknown bpdu type %x", bpdu->hdr.bpdu_type); |
604 | return; | |
11904a35 SH |
605 | } |
606 | ||
607 | // dump_hex(data, len); | |
608 | instance_begin(ifc->master); | |
358260ff | 609 | int r = STP_IN_rx_bpdu(0, ifc->port_index, bpdu, len); |
11904a35 SH |
610 | if (r) |
611 | ERROR("STP_IN_rx_bpdu on port %s returned %s", ifc->name, | |
612 | STP_IN_get_error_explanation(r)); | |
613 | instance_end(); | |
ad02a0eb SH |
614 | } |
615 | ||
616 | void bridge_one_second(void) | |
617 | { | |
11904a35 SH |
618 | // LOG(""); |
619 | struct ifdata *br; | |
620 | for (br = br_head; br; br = br->bridge_next) { | |
621 | if (br->stp_up) { | |
622 | instance_begin(br); | |
623 | STP_IN_one_second(); | |
624 | instance_end(); | |
625 | } | |
626 | } | |
627 | ||
628 | /* To get information about port changes when bridge is down */ | |
629 | /* But won't work so well since we will not sense deletions */ | |
630 | static int count = 0; | |
631 | count++; | |
632 | if (count % 60 == 0) | |
633 | bridge_get_configuration(); | |
ad02a0eb SH |
634 | |
635 | } | |
636 | ||
637 | /* Implementing STP_OUT functions */ | |
638 | ||
639 | int flush_port(char *sys_name) | |
640 | { | |
11904a35 SH |
641 | FILE *f = fopen(sys_name, "w"); |
642 | TSTM(f, -1, "Couldn't open flush file %s for write.", sys_name); | |
643 | int r = fwrite("1", 1, 1, f); | |
644 | fclose(f); | |
645 | TST(r == 1, -1); | |
646 | return 0; | |
ad02a0eb SH |
647 | } |
648 | ||
649 | int | |
11904a35 SH |
650 | STP_OUT_flush_lt(IN int port_index, IN int vlan_id, |
651 | IN LT_FLASH_TYPE_T type, IN char *reason) | |
652 | { | |
653 | LOG("port index %d, flash type %d, reason %s", port_index, type, | |
654 | reason); | |
655 | TST(vlan_id == 0, 0); | |
656 | ||
657 | char fname[128]; | |
658 | if (port_index == 0) { /* i.e. passed port_index was 0 */ | |
659 | sprintf(fname, "/sys/class/net/%s/bridge/flush", | |
660 | current_br->name); | |
661 | flush_port(fname); | |
662 | } else if (type == LT_FLASH_ONLY_THE_PORT) { | |
663 | struct ifdata *port = find_port(port_index); | |
664 | TST(port != NULL, 0); | |
665 | sprintf(fname, "/sys/class/net/%s/brif/%s/flush", | |
666 | current_br->name, port->name); | |
667 | flush_port(fname); | |
668 | } else if (type == LT_FLASH_ALL_PORTS_EXCLUDE_THIS) { | |
669 | struct ifdata *port; | |
670 | for (port = current_br->port_list; port; port = port->port_next) { | |
671 | if (port->port_index != port_index) { | |
672 | sprintf(fname, | |
673 | "/sys/class/net/%s/brif/%s/flush", | |
674 | current_br->name, port->name); | |
675 | flush_port(fname); | |
676 | } | |
677 | } | |
678 | } else | |
679 | TST(0, 0); | |
680 | ||
681 | return 0; | |
ad02a0eb SH |
682 | } |
683 | ||
11904a35 SH |
684 | void /* for bridge id calculation */ STP_OUT_get_port_mac(IN int port_index, |
685 | OUT unsigned char | |
686 | *mac) | |
687 | { | |
688 | LOG("port index %d", port_index); | |
689 | struct ifdata *port = find_port(port_index); | |
690 | TST(port != NULL,); | |
691 | get_hwaddr(port->name, mac); | |
ad02a0eb SH |
692 | } |
693 | ||
11904a35 | 694 | unsigned long STP_OUT_get_port_oper_speed(IN unsigned int port_index) |
ad02a0eb | 695 | { |
11904a35 SH |
696 | LOG("port index %d", port_index); |
697 | struct ifdata *port = find_port(port_index); | |
698 | TST(port != NULL, 0); | |
699 | LOG("Speed: %d", port->speed); | |
700 | return port->speed; | |
ad02a0eb SH |
701 | } |
702 | ||
11904a35 | 703 | int /* 1- Up, 0- Down */ STP_OUT_get_port_link_status(IN int port_index) |
ad02a0eb | 704 | { |
11904a35 SH |
705 | LOG("port index %d", port_index); |
706 | struct ifdata *port = find_port(port_index); | |
707 | TST(port != NULL, 0); | |
708 | LOG("Link status: %d", port->up); | |
709 | return port->up; | |
ad02a0eb SH |
710 | } |
711 | ||
11904a35 | 712 | int /* 1- Full, 0- Half */ STP_OUT_get_duplex(IN int port_index) |
ad02a0eb | 713 | { |
11904a35 SH |
714 | LOG("port index %d", port_index); |
715 | struct ifdata *port = find_port(port_index); | |
716 | TST(port != NULL, 0); | |
717 | LOG("Duplex: %d", port->duplex); | |
718 | return port->duplex; | |
719 | } | |
720 | ||
721 | int | |
722 | STP_OUT_set_port_state(IN int port_index, IN int vlan_id, | |
723 | IN RSTP_PORT_STATE state) | |
724 | { | |
725 | LOG("port index %d, state %d", port_index, state); | |
726 | struct ifdata *port = find_port(port_index); | |
727 | TST(port != NULL, 0); | |
728 | TST(vlan_id == 0, 0); | |
729 | ||
730 | int br_state; | |
731 | switch (state) { | |
732 | case UID_PORT_DISCARDING: | |
733 | br_state = BR_STATE_BLOCKING; | |
734 | break; | |
735 | case UID_PORT_LEARNING: | |
736 | br_state = BR_STATE_LEARNING; | |
737 | break; | |
738 | case UID_PORT_FORWARDING: | |
739 | br_state = BR_STATE_FORWARDING; | |
740 | break; | |
741 | default: | |
742 | fprintf(stderr, "set_port_state: Unexpected state %d\n", state); | |
743 | return -1; | |
744 | } | |
745 | if (port->up) | |
746 | bridge_set_state(port->if_index, br_state); | |
747 | return 0; | |
748 | } | |
749 | ||
750 | int STP_OUT_set_hardware_mode(int vlan_id, UID_STP_MODE_T mode) | |
751 | { | |
752 | LOG("vlan id %d, mode %d", vlan_id, mode); | |
753 | return 0; | |
ad02a0eb SH |
754 | } |
755 | ||
756 | int | |
11904a35 SH |
757 | STP_OUT_tx_bpdu(IN int port_index, IN int vlan_id, |
758 | IN unsigned char *bpdu, IN size_t bpdu_len) | |
ad02a0eb | 759 | { |
11904a35 SH |
760 | LOG("port index %d, len %zd", port_index, bpdu_len); |
761 | struct ifdata *port = find_port(port_index); | |
762 | TST(port != NULL, 0); | |
763 | TST(vlan_id == 0, 0); | |
358260ff SH |
764 | |
765 | packet_send(port->if_index, bpdu, | |
40f958aa | 766 | bpdu_len + sizeof(MAC_HEADER_T) + sizeof(ETH_HEADER_T)); |
11904a35 SH |
767 | return 0; |
768 | } | |
ad02a0eb | 769 | |
11904a35 SH |
770 | const char *STP_OUT_get_port_name(IN int port_index) |
771 | { | |
772 | LOG("port index %d", port_index); | |
773 | struct ifdata *port = find_port(port_index); | |
774 | TST(port != NULL, 0); | |
775 | return port->name; | |
776 | } | |
ad02a0eb | 777 | |
11904a35 SH |
778 | int STP_OUT_get_init_stpm_cfg(IN int vlan_id, INOUT UID_STP_CFG_T * cfg) |
779 | { | |
780 | LOG(""); | |
781 | TST(vlan_id == 0, 0); | |
782 | ||
783 | cfg->bridge_priority = current_br->bridge_priority; | |
784 | cfg->max_age = current_br->max_age; | |
785 | cfg->hello_time = current_br->hello_time; | |
786 | cfg->forward_delay = current_br->forward_delay; | |
787 | cfg->force_version = current_br->force_version; | |
788 | ||
789 | return 0; | |
ad02a0eb SH |
790 | } |
791 | ||
792 | int | |
11904a35 SH |
793 | STP_OUT_get_init_port_cfg(IN int vlan_id, |
794 | IN int port_index, INOUT UID_STP_PORT_CFG_T * cfg) | |
ad02a0eb | 795 | { |
11904a35 SH |
796 | LOG("port index %d", port_index); |
797 | struct ifdata *port = find_port(port_index); | |
798 | TST(port != NULL, 0); | |
799 | TST(vlan_id == 0, 0); | |
ad02a0eb | 800 | |
11904a35 SH |
801 | cfg->port_priority = port->port_priority; |
802 | cfg->admin_non_stp = port->admin_non_stp; | |
803 | cfg->admin_edge = port->admin_edge; | |
804 | cfg->admin_port_path_cost = port->admin_port_path_cost; | |
805 | cfg->admin_point2point = port->admin_point2point; | |
ad02a0eb | 806 | |
11904a35 | 807 | return 0; |
ad02a0eb SH |
808 | } |
809 | ||
11904a35 | 810 | extern void stp_trace(const char *fmt, ...) |
ad02a0eb | 811 | { |
11904a35 SH |
812 | va_list ap; |
813 | va_start(ap, fmt); | |
814 | vDprintf(LOG_LEVEL_RSTPLIB, fmt, ap); | |
815 | va_end(ap); | |
ad02a0eb SH |
816 | } |
817 | ||
818 | /* Commands and status */ | |
819 | #include "ctl_functions.h" | |
820 | ||
821 | #define CTL_CHECK_BRIDGE \ | |
822 | struct ifdata *br = find_if(br_index); \ | |
823 | if (br == NULL || !br->is_bridge) return Err_Interface_not_a_bridge; \ | |
824 | if (!br->do_stp) return Err_Bridge_RSTP_not_enabled; \ | |
825 | if (!br->stp_up) return Err_Bridge_is_down; \ | |
826 | do { } while (0) | |
827 | ||
828 | #define CTL_CHECK_BRIDGE_PORT \ | |
829 | CTL_CHECK_BRIDGE; \ | |
830 | struct ifdata *port = find_if(port_index); \ | |
831 | if (port == NULL || port->is_bridge || port->master != br) \ | |
832 | return Err_Port_does_not_belong_to_bridge; \ | |
833 | do { } while (0) | |
834 | ||
835 | int CTL_enable_bridge_rstp(int br_index, int enable) | |
836 | { | |
11904a35 SH |
837 | INFO("bridge %d, enable %d", br_index, enable); |
838 | int r = 0; | |
839 | if (enable) | |
840 | enable = 1; | |
841 | struct ifdata *br = find_if(br_index); | |
842 | if (br == NULL) { | |
843 | char ifname[IFNAMSIZ]; | |
844 | if (if_indextoname(br_index, ifname) && is_bridge(ifname)) | |
845 | br = create_if(br_index, NULL); | |
846 | } | |
847 | if (br == NULL || !br->is_bridge) | |
848 | return Err_Interface_not_a_bridge; | |
849 | if (br->do_stp != enable) { | |
850 | br->do_stp = enable; | |
851 | if (br->up) | |
852 | r = enable ? init_bridge_stp(br) | |
853 | : (clear_bridge_stp(br), 0); | |
854 | } | |
855 | return r; | |
ad02a0eb SH |
856 | } |
857 | ||
858 | int CTL_get_bridge_state(int br_index, | |
11904a35 SH |
859 | UID_STP_CFG_T * cfg, UID_STP_STATE_T * state) |
860 | { | |
861 | LOG("bridge %d", br_index); | |
862 | CTL_CHECK_BRIDGE; | |
863 | int r; | |
864 | instance_begin(br); | |
865 | r = STP_IN_stpm_get_state(0, state); | |
866 | if (r) { | |
867 | ERROR("Error getting bridge state for %d: %s", br_index, | |
868 | STP_IN_get_error_explanation(r)); | |
869 | instance_end(); | |
870 | return r; | |
871 | } | |
872 | r = STP_IN_stpm_get_cfg(0, cfg); | |
873 | if (r) { | |
874 | ERROR("Error getting bridge config for %d: %s", br_index, | |
875 | STP_IN_get_error_explanation(r)); | |
876 | instance_end(); | |
877 | return r; | |
878 | } | |
879 | instance_end(); | |
880 | return 0; | |
881 | } | |
882 | ||
883 | int CTL_set_bridge_config(int br_index, UID_STP_CFG_T * cfg) | |
884 | { | |
885 | INFO("bridge %d, flags %#lx", br_index, cfg->field_mask); | |
886 | CTL_CHECK_BRIDGE; | |
887 | int r; | |
888 | instance_begin(br); | |
889 | r = STP_IN_stpm_set_cfg(0, NULL, cfg); | |
890 | if (r) { | |
891 | ERROR("Error setting bridge config for %d: %s", br_index, | |
892 | STP_IN_get_error_explanation(r)); | |
893 | instance_end(); | |
894 | return r; | |
895 | } | |
896 | instance_end(); | |
897 | /* Change init config in ifdata so it will be applied if we | |
898 | disable and enable rstp */ | |
899 | update_bridge_stp_config(br, cfg); | |
900 | return 0; | |
ad02a0eb SH |
901 | } |
902 | ||
903 | int CTL_get_port_state(int br_index, int port_index, | |
11904a35 SH |
904 | UID_STP_PORT_CFG_T * cfg, UID_STP_PORT_STATE_T * state) |
905 | { | |
906 | LOG("bridge %d port %d", br_index, port_index); | |
907 | CTL_CHECK_BRIDGE_PORT; | |
908 | int r; | |
909 | instance_begin(br); | |
910 | state->port_no = port->port_index; | |
911 | r = STP_IN_port_get_state(0, state); | |
912 | if (r) { | |
913 | ERROR("Error getting port state for port %d, bridge %d: %s", | |
914 | port->port_index, br_index, | |
915 | STP_IN_get_error_explanation(r)); | |
916 | instance_end(); | |
917 | return r; | |
918 | } | |
919 | r = STP_IN_port_get_cfg(0, port->port_index, cfg); | |
920 | if (r) { | |
921 | ERROR("Error getting port config for port %d, bridge %d: %s", | |
922 | port->port_index, br_index, | |
923 | STP_IN_get_error_explanation(r)); | |
924 | instance_end(); | |
925 | return r; | |
926 | } | |
927 | instance_end(); | |
928 | return 0; | |
929 | ||
930 | } | |
931 | ||
932 | int CTL_set_port_config(int br_index, int port_index, UID_STP_PORT_CFG_T * cfg) | |
933 | { | |
934 | INFO("bridge %d, port %d, flags %#lx", br_index, port_index, | |
935 | cfg->field_mask); | |
936 | CTL_CHECK_BRIDGE_PORT; | |
937 | int r; | |
938 | instance_begin(br); | |
939 | r = STP_IN_set_port_cfg(0, port->port_index, cfg); | |
940 | if (r) { | |
941 | ERROR("Error setting port config for port %d, bridge %d: %s", | |
942 | port->port_index, br_index, | |
943 | STP_IN_get_error_explanation(r)); | |
944 | instance_end(); | |
945 | return r; | |
946 | } | |
947 | instance_end(); | |
948 | /* Change init config in ifdata so it will be applied if we | |
949 | disable and enable rstp */ | |
950 | update_port_stp_config(port, cfg); | |
951 | return 0; | |
ad02a0eb SH |
952 | } |
953 | ||
954 | int CTL_set_debug_level(int level) | |
955 | { | |
11904a35 SH |
956 | INFO("level %d", level); |
957 | log_level = level; | |
958 | return 0; | |
ad02a0eb SH |
959 | } |
960 | ||
ad02a0eb SH |
961 | #undef CTL_CHECK_BRIDGE_PORT |
962 | #undef CTL_CHECK_BRIDGE |