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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" | |
27 | #include "packet.h" | |
28 | ||
29 | #include <unistd.h> | |
30 | #include <net/if.h> | |
31 | #include <stdlib.h> | |
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 | ||
47 | /*------------------------------------------------------------*/ | |
48 | ||
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 */ | |
85 | ||
86 | struct epoll_event_handler event; | |
87 | }; | |
88 | ||
89 | /* Instances */ | |
90 | struct ifdata *current_br = NULL; | |
91 | ||
92 | void instance_begin(struct ifdata *br) | |
93 | { | |
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); | |
100 | } | |
101 | ||
102 | void instance_end(void) | |
103 | { | |
104 | STP_IN_instance_end(current_br->stp); | |
105 | current_br = NULL; | |
106 | } | |
107 | ||
108 | struct ifdata *find_port(int port_index) | |
109 | { | |
110 | struct ifdata *ifc = current_br->port_list; | |
111 | while (ifc && ifc->port_index != port_index) | |
112 | ifc = ifc->port_next; | |
113 | return ifc; | |
114 | } | |
115 | ||
116 | /*************************************************************/ | |
117 | /* Bridge and port defaults */ | |
118 | ||
119 | UID_STP_CFG_T default_bridge_stp_cfg = { | |
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 */ | |
126 | }; | |
127 | ||
128 | void update_bridge_stp_config(struct ifdata *br, UID_STP_CFG_T * cfg) | |
129 | { | |
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; | |
140 | } | |
141 | ||
142 | UID_STP_PORT_CFG_T default_port_stp_cfg = { | |
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, | |
149 | }; | |
150 | ||
151 | void update_port_stp_config(struct ifdata *ifc, UID_STP_PORT_CFG_T * cfg) | |
152 | { | |
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; | |
163 | } | |
164 | ||
165 | /**************************************************************/ | |
166 | ||
167 | int add_port_stp(struct ifdata *ifc) | |
168 | { /* Bridge is ifc->master */ | |
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; | |
185 | } | |
186 | ||
187 | void remove_port_stp(struct ifdata *ifc) | |
188 | { | |
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 | } | |
199 | } | |
200 | ||
201 | int init_rstplib_instance(struct ifdata *br) | |
202 | { | |
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 | } | |
208 | ||
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 | } | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | void clear_rstplib_instance(struct ifdata *br) | |
224 | { | |
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; | |
235 | } | |
236 | ||
237 | int init_bridge_stp(struct ifdata *br) | |
238 | { | |
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; | |
265 | } | |
266 | ||
267 | void clear_bridge_stp(struct ifdata *br) | |
268 | { | |
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); | |
279 | } | |
280 | ||
281 | struct ifdata *if_head = NULL; | |
282 | struct ifdata *br_head = NULL; | |
283 | ||
284 | struct ifdata *find_if(int if_index) | |
285 | { | |
286 | struct ifdata *p = if_head; | |
287 | while (p && p->if_index != if_index) | |
288 | p = p->next; | |
289 | return p; | |
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 | { | |
313 | struct ifdata *p; | |
314 | TST((p = malloc(sizeof(*p))) != NULL, NULL); | |
315 | ||
316 | memset(p, 0, sizeof(*p)); | |
317 | ||
318 | /* Init fields */ | |
319 | p->if_index = if_index; | |
320 | p->is_bridge = (br == NULL); | |
321 | ||
322 | /* TODO: purge use of name, due to issue with renameing */ | |
323 | if_indextoname(if_index, p->name); | |
324 | ||
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; | |
342 | ||
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 */ | |
345 | ||
346 | if (br->stp_up) { | |
347 | add_port_stp(p); | |
348 | } | |
349 | } | |
350 | ||
351 | /* Add to interface list */ | |
352 | ADD_TO_LIST(if_head, next, p); | |
353 | ||
354 | return p; | |
355 | } | |
356 | ||
357 | void delete_if(struct ifdata *ifc) | |
358 | { | |
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 | } | |
378 | ||
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); | |
383 | free(ifc); | |
384 | } | |
385 | ||
386 | static int stp_enabled(struct ifdata *br) | |
387 | { | |
388 | char path[40 + IFNAMSIZ]; | |
389 | int ret; | |
390 | sprintf(path, "/sys/class/net/%s/bridge/stp_state", br->name); | |
391 | FILE *f = fopen(path, "r"); | |
392 | if (!f) { | |
393 | LOG("Open %s failed", path); | |
394 | return 0; | |
395 | } | |
396 | int enabled = 0; | |
397 | ret = fscanf(f, "%d", &enabled); | |
398 | if (!ret) { | |
399 | LOG("%s, stp_state parsing error", path); | |
400 | return 0; | |
401 | } | |
402 | fclose(f); | |
403 | INFO("STP on %s state %d", br->name, enabled); | |
404 | ||
405 | return enabled == 2; /* ie user mode STP */ | |
406 | } | |
407 | ||
408 | static void set_br_up(struct ifdata *br, int up) | |
409 | { | |
410 | int stp_up = stp_enabled(br); | |
411 | INFO("%s was %s stp was %s", br->name, | |
412 | up ? "up" : "down", | |
413 | br->stp_up ? "up" : "down"); | |
414 | INFO("Set bridge %s %s stp %s" , br->name, | |
415 | up ? "up" : "down", | |
416 | stp_up ? "up" : "down"); | |
417 | ||
418 | if (up != br->up) | |
419 | br->up = up; | |
420 | ||
421 | if (br->stp_up != stp_up) { | |
422 | if (stp_up) | |
423 | init_bridge_stp(br); | |
424 | else | |
425 | clear_bridge_stp(br); | |
426 | } | |
427 | } | |
428 | ||
429 | static void set_if_up(struct ifdata *ifc, int up) | |
430 | { | |
431 | INFO("Port %s : %s", ifc->name, (up ? "up" : "down")); | |
432 | int speed = -1; | |
433 | int duplex = -1; | |
434 | int notify_flags = 0; | |
435 | const int NOTIFY_UP = 1, NOTIFY_SPEED = 2, NOTIFY_DUPLEX = 4; | |
436 | if (!up) { /* Down */ | |
437 | if (ifc->up) { | |
438 | ifc->up = up; | |
439 | notify_flags |= NOTIFY_UP; | |
440 | } | |
441 | } else { /* Up */ | |
442 | int r = ethtool_get_speed_duplex(ifc->name, &speed, &duplex); | |
443 | if (r < 0) { /* Didn't succeed */ | |
444 | } | |
445 | if (speed < 0) | |
446 | speed = 10; | |
447 | if (duplex < 0) | |
448 | duplex = 0; /* Assume half duplex */ | |
449 | ||
450 | if (speed != ifc->speed) { | |
451 | ifc->speed = speed; | |
452 | notify_flags |= NOTIFY_SPEED; | |
453 | } | |
454 | if (duplex != ifc->duplex) { | |
455 | ifc->duplex = duplex; | |
456 | notify_flags |= NOTIFY_DUPLEX; | |
457 | } | |
458 | if (!ifc->up) { | |
459 | ifc->up = 1; | |
460 | notify_flags |= NOTIFY_UP; | |
461 | } | |
462 | } | |
463 | if (notify_flags && ifc->master->stp_up) { | |
464 | instance_begin(ifc->master); | |
465 | ||
466 | if (notify_flags & NOTIFY_SPEED) | |
467 | STP_IN_changed_port_speed(ifc->port_index, speed); | |
468 | if (notify_flags & NOTIFY_DUPLEX) | |
469 | STP_IN_changed_port_duplex(ifc->port_index); | |
470 | if (notify_flags & NOTIFY_UP) | |
471 | STP_IN_enable_port(ifc->port_index, ifc->up); | |
472 | ||
473 | instance_end(); | |
474 | } | |
475 | } | |
476 | ||
477 | /*------------------------------------------------------------*/ | |
478 | ||
479 | int bridge_notify(int br_index, int if_index, int newlink, | |
480 | unsigned flags) | |
481 | { | |
482 | struct ifdata *br = NULL; | |
483 | ||
484 | LOG("br_index %d, if_index %d, up %d running %d", | |
485 | br_index, if_index, (flags & IFF_UP), flags & IFF_RUNNING); | |
486 | ||
487 | if (br_index >= 0) { | |
488 | br = find_if(br_index); | |
489 | if (br && !br->is_bridge) { | |
490 | ERROR | |
491 | ("Notification shows non bridge interface %d as bridge.", | |
492 | br_index); | |
493 | return -1; | |
494 | } | |
495 | if (!br) | |
496 | br = create_if(br_index, NULL); | |
497 | if (!br) { | |
498 | ERROR("Couldn't create data for bridge interface %d", | |
499 | br_index); | |
500 | return -1; | |
501 | } | |
502 | /* Bridge must be up if we get such notifications */ | |
503 | if (!br->up) | |
504 | set_br_up(br, 1); | |
505 | } | |
506 | ||
507 | struct ifdata *ifc = find_if(if_index); | |
508 | ||
509 | if (br) { | |
510 | if (ifc) { | |
511 | if (ifc->is_bridge) { | |
512 | ERROR | |
513 | ("Notification shows bridge interface %d as slave of %d", | |
514 | if_index, br_index); | |
515 | return -1; | |
516 | } | |
517 | if (ifc->master != br) { | |
518 | INFO("Device %d has come to bridge %d. " | |
519 | "Missed notify for deletion from bridge %d", | |
520 | if_index, br_index, ifc->master->if_index); | |
521 | delete_if(ifc); | |
522 | ifc = NULL; | |
523 | } | |
524 | } | |
525 | if (!ifc) | |
526 | ifc = create_if(if_index, br); | |
527 | if (!ifc) { | |
528 | ERROR | |
529 | ("Couldn't create data for interface %d (master %d)", | |
530 | if_index, br_index); | |
531 | return -1; | |
532 | } | |
533 | if (!newlink && !is_bridge_slave(br->name, ifc->name)) { | |
534 | /* brctl delif generates a DELLINK, but so does ifconfig <slave> down. | |
535 | So check and delete if it has been removed. | |
536 | */ | |
537 | delete_if(ifc); | |
538 | return 0; | |
539 | } | |
540 | int up = (flags & (IFF_UP|IFF_RUNNING)) == (IFF_UP|IFF_RUNNING); | |
541 | ||
542 | if (ifc->up != up) | |
543 | set_if_up(ifc, up); /* And speed and duplex */ | |
544 | } else { /* No br_index */ | |
545 | if (!newlink) { | |
546 | /* DELLINK not from bridge means interface unregistered. */ | |
547 | /* Cleanup removed bridge or removed bridge slave */ | |
548 | if (ifc) | |
549 | delete_if(ifc); | |
550 | return 0; | |
551 | } else { /* This may be a new link */ | |
552 | if (!ifc) { | |
553 | char ifname[IFNAMSIZ]; | |
554 | if (if_indextoname(if_index, ifname) | |
555 | && is_bridge(ifname)) { | |
556 | ifc = create_if(if_index, NULL); | |
557 | if (!ifc) { | |
558 | ERROR | |
559 | ("Couldn't create data for bridge interface %d", | |
560 | if_index); | |
561 | return -1; | |
562 | } | |
563 | } | |
564 | } | |
565 | if (ifc && !ifc->is_bridge && | |
566 | !is_bridge_slave(ifc->master->name, ifc->name)) { | |
567 | /* Interface might have left bridge and we might have missed deletion */ | |
568 | delete_if(ifc); | |
569 | return 0; | |
570 | } | |
571 | ||
572 | if (ifc) { | |
573 | if (ifc->is_bridge) { | |
574 | int up = (flags & IFF_UP) != 0; | |
575 | if (ifc->up != up) | |
576 | set_br_up(ifc, up); | |
577 | } else { | |
578 | int up = (flags & (IFF_UP|IFF_RUNNING)) == (IFF_UP|IFF_RUNNING); | |
579 | ||
580 | if (ifc->up != up) | |
581 | set_if_up(ifc, up); | |
582 | } | |
583 | } | |
584 | } | |
585 | } | |
586 | return 0; | |
587 | } | |
588 | ||
589 | void bridge_bpdu_rcv(int if_index, const unsigned char *data, int len) | |
590 | { | |
591 | struct ifdata *ifc = find_if(if_index); | |
592 | BPDU_T *bpdu = (BPDU_T *) (data + sizeof(MAC_HEADER_T)); | |
593 | ||
594 | LOG("ifindex %d, len %d", if_index, len); | |
595 | if (!ifc || !ifc->master) | |
596 | return; | |
597 | ||
598 | TST(ifc->up,); | |
599 | TST(ifc->master->stp_up,); | |
600 | TST(len > sizeof(MAC_HEADER_T) + sizeof(ETH_HEADER_T) + sizeof(BPDU_HEADER_T),); | |
601 | ||
602 | /* Do some validation */ | |
603 | if (bpdu->hdr.protocol[0] || bpdu->hdr.protocol[1]) | |
604 | return; | |
605 | ||
606 | switch (bpdu->hdr.bpdu_type) { | |
607 | case BPDU_RSTP: | |
608 | TST(len >= 36,); | |
609 | case BPDU_CONFIG_TYPE: | |
610 | TST(len >= 35,); | |
611 | /* 802.1w doesn't ask for this */ | |
612 | // TST(ntohs(*(uint16_t*)bpdu.body.message_age) | |
613 | // < ntohs(*(uint16_t*)bpdu.body.max_age), ); | |
614 | TST(memcmp(bpdu->body.bridge_id, &ifc->master->bridge_id, 8) != 0 | |
615 | || (ntohs(*(uint16_t *) bpdu->body.port_id) & 0xfff) != | |
616 | ifc->port_index,); | |
617 | break; | |
618 | case BPDU_TOPO_CHANGE_TYPE: | |
619 | break; | |
620 | default: | |
621 | LOG("Receive unknown bpdu type %x", bpdu->hdr.bpdu_type); | |
622 | return; | |
623 | } | |
624 | ||
625 | // dump_hex(data, len); | |
626 | instance_begin(ifc->master); | |
627 | int r = STP_IN_rx_bpdu(0, ifc->port_index, bpdu, len); | |
628 | if (r) | |
629 | ERROR("STP_IN_rx_bpdu on port %s returned %s", ifc->name, | |
630 | STP_IN_get_error_explanation(r)); | |
631 | instance_end(); | |
632 | } | |
633 | ||
634 | void bridge_one_second(void) | |
635 | { | |
636 | // LOG(""); | |
637 | struct ifdata *br; | |
638 | for (br = br_head; br; br = br->bridge_next) { | |
639 | if (br->stp_up) { | |
640 | instance_begin(br); | |
641 | STP_IN_one_second(); | |
642 | instance_end(); | |
643 | } | |
644 | } | |
645 | ||
646 | /* To get information about port changes when bridge is down */ | |
647 | /* But won't work so well since we will not sense deletions */ | |
648 | static int count = 0; | |
649 | count++; | |
650 | if (count % 60 == 0) | |
651 | bridge_get_configuration(); | |
652 | ||
653 | } | |
654 | ||
655 | /* Implementing STP_OUT functions */ | |
656 | ||
657 | int flush_port(char *sys_name) | |
658 | { | |
659 | FILE *f = fopen(sys_name, "w"); | |
660 | TSTM(f, -1, "Couldn't open flush file %s for write.", sys_name); | |
661 | int r = fwrite("1", 1, 1, f); | |
662 | fclose(f); | |
663 | TST(r == 1, -1); | |
664 | return 0; | |
665 | } | |
666 | ||
667 | int | |
668 | STP_OUT_flush_lt(IN int port_index, IN int vlan_id, | |
669 | IN LT_FLASH_TYPE_T type, IN char *reason) | |
670 | { | |
671 | LOG("port index %d, flash type %d, reason %s", port_index, type, | |
672 | reason); | |
673 | TST(vlan_id == 0, 0); | |
674 | ||
675 | char fname[128]; | |
676 | if (port_index == 0) { /* i.e. passed port_index was 0 */ | |
677 | sprintf(fname, "/sys/class/net/%s/bridge/flush", | |
678 | current_br->name); | |
679 | flush_port(fname); | |
680 | } else if (type == LT_FLASH_ONLY_THE_PORT) { | |
681 | struct ifdata *port = find_port(port_index); | |
682 | TST(port != NULL, 0); | |
683 | sprintf(fname, "/sys/class/net/%s/brif/%s/flush", | |
684 | current_br->name, port->name); | |
685 | flush_port(fname); | |
686 | } else if (type == LT_FLASH_ALL_PORTS_EXCLUDE_THIS) { | |
687 | struct ifdata *port; | |
688 | for (port = current_br->port_list; port; port = port->port_next) { | |
689 | if (port->port_index != port_index) { | |
690 | sprintf(fname, | |
691 | "/sys/class/net/%s/brif/%s/flush", | |
692 | current_br->name, port->name); | |
693 | flush_port(fname); | |
694 | } | |
695 | } | |
696 | } else | |
697 | TST(0, 0); | |
698 | ||
699 | return 0; | |
700 | } | |
701 | ||
702 | void /* for bridge id calculation */ STP_OUT_get_port_mac(IN int port_index, | |
703 | OUT unsigned char | |
704 | *mac) | |
705 | { | |
706 | LOG("port index %d", port_index); | |
707 | struct ifdata *port = find_port(port_index); | |
708 | TST(port != NULL,); | |
709 | get_hwaddr(port->name, mac); | |
710 | } | |
711 | ||
712 | unsigned long STP_OUT_get_port_oper_speed(IN unsigned int port_index) | |
713 | { | |
714 | LOG("port index %d", port_index); | |
715 | struct ifdata *port = find_port(port_index); | |
716 | TST(port != NULL, 0); | |
717 | LOG("Speed: %d", port->speed); | |
718 | return port->speed; | |
719 | } | |
720 | ||
721 | int /* 1- Up, 0- Down */ STP_OUT_get_port_link_status(IN int port_index) | |
722 | { | |
723 | LOG("port index %d", port_index); | |
724 | struct ifdata *port = find_port(port_index); | |
725 | TST(port != NULL, 0); | |
726 | LOG("Link status: %d", port->up); | |
727 | return port->up; | |
728 | } | |
729 | ||
730 | int /* 1- Full, 0- Half */ STP_OUT_get_duplex(IN int port_index) | |
731 | { | |
732 | LOG("port index %d", port_index); | |
733 | struct ifdata *port = find_port(port_index); | |
734 | TST(port != NULL, 0); | |
735 | LOG("Duplex: %d", port->duplex); | |
736 | return port->duplex; | |
737 | } | |
738 | ||
739 | int | |
740 | STP_OUT_set_port_state(IN int port_index, IN int vlan_id, | |
741 | IN RSTP_PORT_STATE state) | |
742 | { | |
743 | LOG("port index %d, state %d", port_index, state); | |
744 | struct ifdata *port = find_port(port_index); | |
745 | TST(port != NULL, 0); | |
746 | TST(vlan_id == 0, 0); | |
747 | ||
748 | int br_state; | |
749 | switch (state) { | |
750 | case UID_PORT_DISCARDING: | |
751 | br_state = BR_STATE_BLOCKING; | |
752 | break; | |
753 | case UID_PORT_LEARNING: | |
754 | br_state = BR_STATE_LEARNING; | |
755 | break; | |
756 | case UID_PORT_FORWARDING: | |
757 | br_state = BR_STATE_FORWARDING; | |
758 | break; | |
759 | default: | |
760 | fprintf(stderr, "set_port_state: Unexpected state %d\n", state); | |
761 | return -1; | |
762 | } | |
763 | if (port->up) | |
764 | bridge_set_state(port->if_index, br_state); | |
765 | return 0; | |
766 | } | |
767 | ||
768 | int STP_OUT_set_hardware_mode(int vlan_id, UID_STP_MODE_T mode) | |
769 | { | |
770 | LOG("vlan id %d, mode %d", vlan_id, mode); | |
771 | return 0; | |
772 | } | |
773 | ||
774 | int | |
775 | STP_OUT_tx_bpdu(IN int port_index, IN int vlan_id, | |
776 | IN unsigned char *bpdu, IN size_t bpdu_len) | |
777 | { | |
778 | LOG("port index %d, len %zd", port_index, bpdu_len); | |
779 | struct ifdata *port = find_port(port_index); | |
780 | TST(port != NULL, 0); | |
781 | TST(vlan_id == 0, 0); | |
782 | ||
783 | packet_send(port->if_index, bpdu, | |
784 | bpdu_len + sizeof(MAC_HEADER_T) + sizeof(ETH_HEADER_T)); | |
785 | return 0; | |
786 | } | |
787 | ||
788 | const char *STP_OUT_get_port_name(IN int port_index) | |
789 | { | |
790 | LOG("port index %d", port_index); | |
791 | struct ifdata *port = find_port(port_index); | |
792 | TST(port != NULL, 0); | |
793 | return port->name; | |
794 | } | |
795 | ||
796 | int STP_OUT_get_init_stpm_cfg(IN int vlan_id, INOUT UID_STP_CFG_T * cfg) | |
797 | { | |
798 | LOG(""); | |
799 | TST(vlan_id == 0, 0); | |
800 | ||
801 | cfg->bridge_priority = current_br->bridge_priority; | |
802 | cfg->max_age = current_br->max_age; | |
803 | cfg->hello_time = current_br->hello_time; | |
804 | cfg->forward_delay = current_br->forward_delay; | |
805 | cfg->force_version = current_br->force_version; | |
806 | ||
807 | return 0; | |
808 | } | |
809 | ||
810 | int | |
811 | STP_OUT_get_init_port_cfg(IN int vlan_id, | |
812 | IN int port_index, INOUT UID_STP_PORT_CFG_T * cfg) | |
813 | { | |
814 | LOG("port index %d", port_index); | |
815 | struct ifdata *port = find_port(port_index); | |
816 | TST(port != NULL, 0); | |
817 | TST(vlan_id == 0, 0); | |
818 | ||
819 | cfg->port_priority = port->port_priority; | |
820 | cfg->admin_non_stp = port->admin_non_stp; | |
821 | cfg->admin_edge = port->admin_edge; | |
822 | cfg->admin_port_path_cost = port->admin_port_path_cost; | |
823 | cfg->admin_point2point = port->admin_point2point; | |
824 | ||
825 | return 0; | |
826 | } | |
827 | ||
828 | extern void stp_trace(const char *fmt, ...) | |
829 | { | |
830 | va_list ap; | |
831 | va_start(ap, fmt); | |
832 | vDprintf(LOG_LEVEL_RSTPLIB, fmt, ap); | |
833 | va_end(ap); | |
834 | } | |
835 | ||
836 | /* Commands and status */ | |
837 | #include "ctl_functions.h" | |
838 | ||
839 | #define CTL_CHECK_BRIDGE \ | |
840 | struct ifdata *br = find_if(br_index); \ | |
841 | if (br == NULL || !br->is_bridge) return Err_Interface_not_a_bridge; \ | |
842 | if (!br->do_stp) return Err_Bridge_RSTP_not_enabled; \ | |
843 | if (!br->stp_up) return Err_Bridge_is_down; \ | |
844 | do { } while (0) | |
845 | ||
846 | #define CTL_CHECK_BRIDGE_PORT \ | |
847 | CTL_CHECK_BRIDGE; \ | |
848 | struct ifdata *port = find_if(port_index); \ | |
849 | if (port == NULL || port->is_bridge || port->master != br) \ | |
850 | return Err_Port_does_not_belong_to_bridge; \ | |
851 | do { } while (0) | |
852 | ||
853 | int CTL_enable_bridge_rstp(int br_index, int enable) | |
854 | { | |
855 | INFO("bridge %d, enable %d", br_index, enable); | |
856 | int r = 0; | |
857 | if (enable) | |
858 | enable = 1; | |
859 | struct ifdata *br = find_if(br_index); | |
860 | if (br == NULL) { | |
861 | char ifname[IFNAMSIZ]; | |
862 | if (if_indextoname(br_index, ifname) && is_bridge(ifname)) | |
863 | br = create_if(br_index, NULL); | |
864 | } | |
865 | if (br == NULL || !br->is_bridge) | |
866 | return Err_Interface_not_a_bridge; | |
867 | if (br->do_stp != enable) { | |
868 | br->do_stp = enable; | |
869 | if (br->up) | |
870 | r = enable ? init_bridge_stp(br) | |
871 | : (clear_bridge_stp(br), 0); | |
872 | } | |
873 | return r; | |
874 | } | |
875 | ||
876 | int CTL_get_bridge_state(int br_index, | |
877 | UID_STP_CFG_T * cfg, UID_STP_STATE_T * state) | |
878 | { | |
879 | LOG("bridge %d", br_index); | |
880 | CTL_CHECK_BRIDGE; | |
881 | int r; | |
882 | instance_begin(br); | |
883 | r = STP_IN_stpm_get_state(0, state); | |
884 | if (r) { | |
885 | ERROR("Error getting bridge state for %d: %s", br_index, | |
886 | STP_IN_get_error_explanation(r)); | |
887 | instance_end(); | |
888 | return r; | |
889 | } | |
890 | r = STP_IN_stpm_get_cfg(0, cfg); | |
891 | if (r) { | |
892 | ERROR("Error getting bridge config for %d: %s", br_index, | |
893 | STP_IN_get_error_explanation(r)); | |
894 | instance_end(); | |
895 | return r; | |
896 | } | |
897 | instance_end(); | |
898 | return 0; | |
899 | } | |
900 | ||
901 | int CTL_set_bridge_config(int br_index, UID_STP_CFG_T * cfg) | |
902 | { | |
903 | INFO("bridge %d, flags %#lx", br_index, cfg->field_mask); | |
904 | CTL_CHECK_BRIDGE; | |
905 | int r; | |
906 | instance_begin(br); | |
907 | r = STP_IN_stpm_set_cfg(0, NULL, cfg); | |
908 | if (r) { | |
909 | ERROR("Error setting bridge config for %d: %s", br_index, | |
910 | STP_IN_get_error_explanation(r)); | |
911 | instance_end(); | |
912 | return r; | |
913 | } | |
914 | instance_end(); | |
915 | /* Change init config in ifdata so it will be applied if we | |
916 | disable and enable rstp */ | |
917 | update_bridge_stp_config(br, cfg); | |
918 | return 0; | |
919 | } | |
920 | ||
921 | int CTL_get_port_state(int br_index, int port_index, | |
922 | UID_STP_PORT_CFG_T * cfg, UID_STP_PORT_STATE_T * state) | |
923 | { | |
924 | LOG("bridge %d port %d", br_index, port_index); | |
925 | CTL_CHECK_BRIDGE_PORT; | |
926 | int r; | |
927 | instance_begin(br); | |
928 | state->port_no = port->port_index; | |
929 | r = STP_IN_port_get_state(0, state); | |
930 | if (r) { | |
931 | ERROR("Error getting port state for port %d, bridge %d: %s", | |
932 | port->port_index, br_index, | |
933 | STP_IN_get_error_explanation(r)); | |
934 | instance_end(); | |
935 | return r; | |
936 | } | |
937 | r = STP_IN_port_get_cfg(0, port->port_index, cfg); | |
938 | if (r) { | |
939 | ERROR("Error getting port config for port %d, bridge %d: %s", | |
940 | port->port_index, br_index, | |
941 | STP_IN_get_error_explanation(r)); | |
942 | instance_end(); | |
943 | return r; | |
944 | } | |
945 | instance_end(); | |
946 | return 0; | |
947 | ||
948 | } | |
949 | ||
950 | int CTL_set_port_config(int br_index, int port_index, UID_STP_PORT_CFG_T * cfg) | |
951 | { | |
952 | INFO("bridge %d, port %d, flags %#lx", br_index, port_index, | |
953 | cfg->field_mask); | |
954 | CTL_CHECK_BRIDGE_PORT; | |
955 | int r; | |
956 | instance_begin(br); | |
957 | r = STP_IN_set_port_cfg(0, port->port_index, cfg); | |
958 | if (r) { | |
959 | ERROR("Error setting port config for port %d, bridge %d: %s", | |
960 | port->port_index, br_index, | |
961 | STP_IN_get_error_explanation(r)); | |
962 | instance_end(); | |
963 | return r; | |
964 | } | |
965 | instance_end(); | |
966 | /* Change init config in ifdata so it will be applied if we | |
967 | disable and enable rstp */ | |
968 | update_port_stp_config(port, cfg); | |
969 | return 0; | |
970 | } | |
971 | ||
972 | int CTL_set_debug_level(int level) | |
973 | { | |
974 | INFO("level %d", level); | |
975 | log_level = level; | |
976 | return 0; | |
977 | } | |
978 | ||
979 | #undef CTL_CHECK_BRIDGE_PORT | |
980 | #undef CTL_CHECK_BRIDGE |