• source navigation  • diff markup  • identifier search  • freetext search  • 

Sources/netifd/proto-shell.c

  1 /*
  2  * netifd - network interface daemon
  3  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
  4  *
  5  * This program is free software; you can redistribute it and/or modify
  6  * it under the terms of the GNU General Public License version 2
  7  * as published by the Free Software Foundation
  8  *
  9  * This program is distributed in the hope that it will be useful,
 10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12  * GNU General Public License for more details.
 13  */
 14 #define _GNU_SOURCE
 15 
 16 #include <string.h>
 17 #include <stdlib.h>
 18 #include <stdio.h>
 19 #include <signal.h>
 20 
 21 #include <arpa/inet.h>
 22 #include <netinet/in.h>
 23 
 24 
 25 #include "netifd.h"
 26 #include "interface.h"
 27 #include "interface-ip.h"
 28 #include "proto.h"
 29 #include "system.h"
 30 #include "handler.h"
 31 
 32 static int proto_fd = -1;
 33 
 34 enum proto_shell_sm {
 35         S_IDLE,
 36         S_SETUP,
 37         S_SETUP_ABORT,
 38         S_TEARDOWN,
 39 };
 40 
 41 struct proto_shell_handler {
 42         struct list_head list;
 43         struct proto_handler proto;
 44         char *config_buf;
 45         char *script_name;
 46         bool init_available;
 47 
 48         struct uci_blob_param_list config;
 49 };
 50 
 51 struct proto_shell_dependency {
 52         struct list_head list;
 53 
 54         struct proto_shell_state *proto;
 55         struct interface_user dep;
 56 
 57         union if_addr host;
 58         bool v6;
 59         bool any;
 60 
 61         char interface[];
 62 };
 63 
 64 struct proto_shell_state {
 65         struct interface_proto_state proto;
 66         struct proto_shell_handler *handler;
 67         struct blob_attr *config;
 68 
 69         struct uloop_timeout teardown_timeout;
 70 
 71         /*
 72          * Teardown and setup interface again if it is still not up (IFS_UP)
 73          * after checkup_interval seconds since previous attempt.  This check
 74          * will be disabled when the config option "checkup_interval" is
 75          * missing or has a negative value
 76          */
 77         int checkup_interval;
 78         struct uloop_timeout checkup_timeout;
 79 
 80         struct netifd_process script_task;
 81         struct netifd_process proto_task;
 82 
 83         enum proto_shell_sm sm;
 84         bool proto_task_killed;
 85         bool renew_pending;
 86 
 87         int last_error;
 88 
 89         struct list_head deps;
 90 };
 91 
 92 static void
 93 proto_shell_check_dependencies(struct proto_shell_state *state)
 94 {
 95         struct proto_shell_dependency *dep;
 96         bool available = true;
 97 
 98         list_for_each_entry(dep, &state->deps, list) {
 99                 if (dep->dep.iface)
100                         continue;
101 
102                 available = false;
103                 break;
104         }
105 
106         interface_set_available(state->proto.iface, available);
107 }
108 
109 static void
110 proto_shell_if_up_cb(struct interface_user *dep, struct interface *iface,
111                      enum interface_event ev);
112 static void
113 proto_shell_if_down_cb(struct interface_user *dep, struct interface *iface,
114                        enum interface_event ev);
115 
116 static void
117 proto_shell_update_host_dep(struct proto_shell_dependency *dep)
118 {
119         struct interface *iface = NULL;
120 
121         if (dep->dep.iface)
122                 goto out;
123 
124         if (dep->interface[0]) {
125                 iface = vlist_find(&interfaces, dep->interface, iface, node);
126 
127                 if (!iface || iface->state != IFS_UP)
128                         goto out;
129         }
130 
131         if (!dep->any)
132                 iface = interface_ip_add_target_route(&dep->host, dep->v6, iface);
133 
134         if (!iface)
135                 goto out;
136 
137         interface_remove_user(&dep->dep);
138         dep->dep.cb = proto_shell_if_down_cb;
139         interface_add_user(&dep->dep, iface);
140 
141 out:
142         proto_shell_check_dependencies(dep->proto);
143 }
144 
145 static void
146 proto_shell_clear_host_dep(struct proto_shell_state *state)
147 {
148         struct proto_shell_dependency *dep, *tmp;
149 
150         list_for_each_entry_safe(dep, tmp, &state->deps, list) {
151                 interface_remove_user(&dep->dep);
152                 list_del(&dep->list);
153                 free(dep);
154         }
155 }
156 
157 static int
158 proto_shell_handler(struct interface_proto_state *proto,
159                     enum interface_proto_cmd cmd, bool force)
160 {
161         struct proto_shell_state *state;
162         struct proto_shell_handler *handler;
163         struct netifd_process *proc;
164         static char error_buf[32];
165         const char *argv[7];
166         char *envp[2];
167         const char *action;
168         char *config;
169         int ret, i = 0, j = 0;
170 
171         state = container_of(proto, struct proto_shell_state, proto);
172         handler = state->handler;
173         proc = &state->script_task;
174 
175         if (cmd == PROTO_CMD_SETUP) {
176                 switch (state->sm) {
177                 case S_IDLE:
178                         action = "setup";
179                         state->last_error = -1;
180                         proto_shell_clear_host_dep(state);
181                         state->sm = S_SETUP;
182                         break;
183 
184                 default:
185                         return -1;
186                 }
187         } else if (cmd == PROTO_CMD_RENEW) {
188                 if (!(handler->proto.flags & PROTO_FLAG_RENEW_AVAILABLE))
189                         return 0;
190 
191                 if (state->script_task.uloop.pending) {
192                         state->renew_pending = true;
193                         return 0;
194                 }
195 
196                 state->renew_pending = false;
197                 action = "renew";
198         } else {
199                 switch (state->sm) {
200                 case S_SETUP:
201                         if (state->script_task.uloop.pending) {
202                                 uloop_timeout_set(&state->teardown_timeout, 1000);
203                                 kill(state->script_task.uloop.pid, SIGTERM);
204                                 if (state->proto_task.uloop.pending)
205                                         kill(state->proto_task.uloop.pid, SIGTERM);
206                                 state->renew_pending = false;
207                                 state->sm = S_SETUP_ABORT;
208                                 return 0;
209                         }
210                 /* if no script task is running */
211                 /* fall through */
212                 case S_IDLE:
213                         action = "teardown";
214                         state->renew_pending = false;
215                         state->sm = S_TEARDOWN;
216                         if (state->last_error >= 0) {
217                                 snprintf(error_buf, sizeof(error_buf), "ERROR=%d", state->last_error);
218                                 envp[j++] = error_buf;
219                         }
220                         uloop_timeout_set(&state->teardown_timeout, 5000);
221                         break;
222 
223                 case S_TEARDOWN:
224                         return 0;
225 
226                 default:
227                         return -1;
228                 }
229         }
230 
231         D(INTERFACE, "run %s for interface '%s'\n", action, proto->iface->name);
232         config = blobmsg_format_json(state->config, true);
233         if (!config)
234                 return -1;
235 
236         argv[i++] = handler->script_name;
237         argv[i++] = handler->proto.name;
238         argv[i++] = action;
239         argv[i++] = proto->iface->name;
240         argv[i++] = config;
241         if (proto->iface->main_dev.dev)
242                 argv[i++] = proto->iface->main_dev.dev->ifname;
243         argv[i] = NULL;
244         envp[j] = NULL;
245 
246         ret = netifd_start_process(argv, envp, proc);
247         free(config);
248 
249         return ret;
250 }
251 
252 static void
253 proto_shell_if_up_cb(struct interface_user *dep, struct interface *iface,
254                      enum interface_event ev)
255 {
256         struct proto_shell_dependency *pdep;
257 
258         if (ev != IFEV_UP && ev != IFEV_UPDATE)
259                 return;
260 
261         pdep = container_of(dep, struct proto_shell_dependency, dep);
262         proto_shell_update_host_dep(pdep);
263 }
264 
265 static void
266 proto_shell_if_down_cb(struct interface_user *dep, struct interface *iface,
267                        enum interface_event ev)
268 {
269         struct proto_shell_dependency *pdep;
270         struct proto_shell_state *state;
271 
272         if (ev == IFEV_UP || ev == IFEV_UPDATE)
273                 return;
274 
275         pdep = container_of(dep, struct proto_shell_dependency, dep);
276         interface_remove_user(dep);
277         dep->cb = proto_shell_if_up_cb;
278         interface_add_user(dep, NULL);
279 
280         state = pdep->proto;
281         if (state->sm == S_IDLE) {
282                 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
283                 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
284         }
285 }
286 
287 static void
288 proto_shell_task_finish(struct proto_shell_state *state,
289                         struct netifd_process *task)
290 {
291         switch (state->sm) {
292         case S_IDLE:
293                 if (task == &state->proto_task)
294                         state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
295                 /* fall through */
296         case S_SETUP:
297                 if (task == &state->proto_task)
298                         proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN,
299                                             false);
300                 else if (task == &state->script_task) {
301                         if (state->renew_pending)
302                                 proto_shell_handler(&state->proto,
303                                                     PROTO_CMD_RENEW, false);
304                         else if (!(state->handler->proto.flags & PROTO_FLAG_NO_TASK) &&
305                                  !state->proto_task.uloop.pending &&
306                                  state->sm == S_SETUP)
307                                 proto_shell_handler(&state->proto,
308                                                     PROTO_CMD_TEARDOWN,
309                                                     false);
310 
311                         /* check up status after setup attempt by this script_task */
312                         if (state->sm == S_SETUP && state->checkup_interval > 0) {
313                                 uloop_timeout_set(&state->checkup_timeout,
314                                                   state->checkup_interval * 1000);
315                         }
316                 }
317                 break;
318 
319         case S_SETUP_ABORT:
320                 if (state->script_task.uloop.pending ||
321                     state->proto_task.uloop.pending)
322                         break;
323 
324                 /* completed aborting all tasks, now idle */
325                 uloop_timeout_cancel(&state->teardown_timeout);
326                 uloop_timeout_cancel(&state->checkup_timeout);
327                 state->sm = S_IDLE;
328                 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
329                 break;
330 
331         case S_TEARDOWN:
332                 if (state->script_task.uloop.pending)
333                         break;
334 
335                 if (state->proto_task.uloop.pending) {
336                         if (!state->proto_task_killed)
337                                 kill(state->proto_task.uloop.pid, SIGTERM);
338                         break;
339                 }
340 
341                 /* completed tearing down all tasks, now idle */
342                 uloop_timeout_cancel(&state->teardown_timeout);
343                 uloop_timeout_cancel(&state->checkup_timeout);
344                 state->sm = S_IDLE;
345                 state->proto.proto_event(&state->proto, IFPEV_DOWN);
346                 break;
347         }
348 }
349 
350 static void
351 proto_shell_teardown_timeout_cb(struct uloop_timeout *timeout)
352 {
353         struct proto_shell_state *state;
354 
355         state = container_of(timeout, struct proto_shell_state, teardown_timeout);
356 
357         netifd_kill_process(&state->script_task);
358         netifd_kill_process(&state->proto_task);
359         proto_shell_task_finish(state, NULL);
360 }
361 
362 static void
363 proto_shell_script_cb(struct netifd_process *p, int ret)
364 {
365         struct proto_shell_state *state;
366 
367         state = container_of(p, struct proto_shell_state, script_task);
368         proto_shell_task_finish(state, p);
369 }
370 
371 static void
372 proto_shell_task_cb(struct netifd_process *p, int ret)
373 {
374         struct proto_shell_state *state;
375 
376         state = container_of(p, struct proto_shell_state, proto_task);
377 
378         if (state->sm == S_IDLE || state->sm == S_SETUP)
379                 state->last_error = WEXITSTATUS(ret);
380 
381         proto_shell_task_finish(state, p);
382 }
383 
384 static void
385 proto_shell_free(struct interface_proto_state *proto)
386 {
387         struct proto_shell_state *state;
388 
389         state = container_of(proto, struct proto_shell_state, proto);
390         uloop_timeout_cancel(&state->teardown_timeout);
391         uloop_timeout_cancel(&state->checkup_timeout);
392         proto_shell_clear_host_dep(state);
393         netifd_kill_process(&state->script_task);
394         netifd_kill_process(&state->proto_task);
395         free(state->config);
396         free(state);
397 }
398 
399 static void
400 proto_shell_parse_route_list(struct interface *iface, struct blob_attr *attr,
401                              bool v6)
402 {
403         struct blob_attr *cur;
404         int rem;
405 
406         blobmsg_for_each_attr(cur, attr, rem) {
407                 if (blobmsg_type(cur) != BLOBMSG_TYPE_TABLE) {
408                         DPRINTF("Ignore wrong route type: %d\n", blobmsg_type(cur));
409                         continue;
410                 }
411 
412                 interface_ip_add_route(iface, cur, v6);
413         }
414 }
415 
416 static void
417 proto_shell_parse_neighbor_list(struct interface *iface, struct blob_attr *attr,
418                                 bool v6)
419 {
420         struct blob_attr *cur;
421         int rem;
422 
423         blobmsg_for_each_attr(cur, attr, rem) {
424                 if (blobmsg_type(cur) != BLOBMSG_TYPE_TABLE) {
425                         DPRINTF("Ignore wrong neighbor type: %d\n", blobmsg_type(cur));
426                         continue;
427                 }
428 
429                 interface_ip_add_neighbor(iface, cur, v6);
430         }
431 }
432 
433 static void
434 proto_shell_parse_data(struct interface *iface, struct blob_attr *attr)
435 {
436         struct blob_attr *cur;
437         int rem;
438 
439         blobmsg_for_each_attr(cur, attr, rem)
440                 interface_add_data(iface, cur);
441 }
442 
443 static struct device *
444 proto_shell_create_tunnel(const char *name, struct blob_attr *attr)
445 {
446         struct device *dev;
447         struct blob_buf b;
448 
449         memset(&b, 0, sizeof(b));
450         blob_buf_init(&b, 0);
451         blob_put(&b, 0, blobmsg_data(attr), blobmsg_data_len(attr));
452         dev = device_create(name, &tunnel_device_type, blob_data(b.head));
453         blob_buf_free(&b);
454 
455         return dev;
456 }
457 
458 enum {
459         NOTIFY_ACTION,
460         NOTIFY_ERROR,
461         NOTIFY_COMMAND,
462         NOTIFY_ENV,
463         NOTIFY_SIGNAL,
464         NOTIFY_AVAILABLE,
465         NOTIFY_LINK_UP,
466         NOTIFY_IFNAME,
467         NOTIFY_ADDR_EXT,
468         NOTIFY_ROUTES,
469         NOTIFY_ROUTES6,
470         NOTIFY_TUNNEL,
471         NOTIFY_DATA,
472         NOTIFY_KEEP,
473         NOTIFY_HOST,
474         NOTIFY_DNS,
475         NOTIFY_DNS_SEARCH,
476         NOTIFY_NEIGHBORS,
477         NOTIFY_NEIGHBORS6,
478         __NOTIFY_LAST
479 };
480 
481 static const struct blobmsg_policy notify_attr[__NOTIFY_LAST] = {
482         [NOTIFY_ACTION] = { .name = "action", .type = BLOBMSG_TYPE_INT32 },
483         [NOTIFY_ERROR] = { .name = "error", .type = BLOBMSG_TYPE_ARRAY },
484         [NOTIFY_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_ARRAY },
485         [NOTIFY_ENV] = { .name = "env", .type = BLOBMSG_TYPE_ARRAY },
486         [NOTIFY_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
487         [NOTIFY_AVAILABLE] = { .name = "available", .type = BLOBMSG_TYPE_BOOL },
488         [NOTIFY_LINK_UP] = { .name = "link-up", .type = BLOBMSG_TYPE_BOOL },
489         [NOTIFY_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
490         [NOTIFY_ADDR_EXT] = { .name = "address-external", .type = BLOBMSG_TYPE_BOOL },
491         [NOTIFY_ROUTES] = { .name = "routes", .type = BLOBMSG_TYPE_ARRAY },
492         [NOTIFY_ROUTES6] = { .name = "routes6", .type = BLOBMSG_TYPE_ARRAY },
493         [NOTIFY_TUNNEL] = { .name = "tunnel", .type = BLOBMSG_TYPE_TABLE },
494         [NOTIFY_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
495         [NOTIFY_KEEP] = { .name = "keep", .type = BLOBMSG_TYPE_BOOL },
496         [NOTIFY_HOST] = { .name = "host", .type = BLOBMSG_TYPE_STRING },
497         [NOTIFY_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
498         [NOTIFY_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
499         [NOTIFY_NEIGHBORS]= {.name = "neighbor", .type = BLOBMSG_TYPE_ARRAY},
500         [NOTIFY_NEIGHBORS6]= {.name = "neighbor6", .type = BLOBMSG_TYPE_ARRAY},
501 };
502 
503 static int
504 proto_shell_update_link(struct proto_shell_state *state, struct blob_attr *data, struct blob_attr **tb)
505 {
506         struct interface *iface = state->proto.iface;
507         struct blob_attr *cur;
508         struct device *dev;
509         const char *devname;
510         int dev_create = 1;
511         bool addr_ext = false;
512         bool keep = false;
513         bool up;
514 
515         if (state->sm == S_TEARDOWN || state->sm == S_SETUP_ABORT)
516                 return UBUS_STATUS_PERMISSION_DENIED;
517 
518         if (!tb[NOTIFY_LINK_UP])
519                 return UBUS_STATUS_INVALID_ARGUMENT;
520 
521         up = blobmsg_get_bool(tb[NOTIFY_LINK_UP]);
522         if (!up) {
523                 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
524                 return 0;
525         }
526 
527         if ((cur = tb[NOTIFY_KEEP]) != NULL)
528                 keep = blobmsg_get_bool(cur);
529 
530         if ((cur = tb[NOTIFY_ADDR_EXT]) != NULL) {
531                 addr_ext = blobmsg_get_bool(cur);
532                 if (addr_ext)
533                         dev_create = 2;
534         }
535 
536         if (iface->state != IFS_UP || !iface->l3_dev.dev)
537                 keep = false;
538 
539         if (!keep) {
540                 dev = iface->main_dev.dev;
541                 if (tb[NOTIFY_IFNAME]) {
542                         keep = false;
543                         devname = blobmsg_data(tb[NOTIFY_IFNAME]);
544                         if (tb[NOTIFY_TUNNEL])
545                                 dev = proto_shell_create_tunnel(devname, tb[NOTIFY_TUNNEL]);
546                         else
547                                 dev = device_get(devname, dev_create);
548                 }
549 
550                 if (!dev)
551                         return UBUS_STATUS_INVALID_ARGUMENT;
552 
553                 interface_set_l3_dev(iface, dev);
554                 if (device_claim(&iface->l3_dev) < 0)
555                         return UBUS_STATUS_UNKNOWN_ERROR;
556 
557                 device_set_present(dev, true);
558         }
559 
560         interface_update_start(iface, keep);
561 
562         proto_apply_ip_settings(iface, data, addr_ext);
563 
564         if ((cur = tb[NOTIFY_ROUTES]) != NULL)
565                 proto_shell_parse_route_list(state->proto.iface, cur, false);
566 
567         if ((cur = tb[NOTIFY_ROUTES6]) != NULL)
568                 proto_shell_parse_route_list(state->proto.iface, cur, true);
569 
570         if ((cur = tb[NOTIFY_NEIGHBORS]) != NULL)
571                 proto_shell_parse_neighbor_list(state->proto.iface, cur, false);
572 
573         if ((cur = tb[NOTIFY_NEIGHBORS6]) != NULL)
574                 proto_shell_parse_neighbor_list(state->proto.iface, cur, true);
575 
576         if ((cur = tb[NOTIFY_DNS]))
577                 interface_add_dns_server_list(&iface->proto_ip, cur);
578 
579         if ((cur = tb[NOTIFY_DNS_SEARCH]))
580                 interface_add_dns_search_list(&iface->proto_ip, cur);
581 
582         if ((cur = tb[NOTIFY_DATA]))
583                 proto_shell_parse_data(state->proto.iface, cur);
584 
585         interface_update_complete(state->proto.iface);
586 
587         if ((state->sm != S_SETUP_ABORT) && (state->sm != S_TEARDOWN)) {
588                 state->proto.proto_event(&state->proto, IFPEV_UP);
589                 state->sm = S_IDLE;
590         }
591 
592         return 0;
593 }
594 
595 static bool
596 fill_string_list(struct blob_attr *attr, char **argv, int max)
597 {
598         struct blob_attr *cur;
599         int argc = 0;
600         int rem;
601 
602         if (!attr)
603                 goto out;
604 
605         blobmsg_for_each_attr(cur, attr, rem) {
606                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
607                         return false;
608 
609                 if (!blobmsg_check_attr(cur, false))
610                         return false;
611 
612                 argv[argc++] = blobmsg_data(cur);
613                 if (argc == max - 1)
614                         return false;
615         }
616 
617 out:
618         argv[argc] = NULL;
619         return true;
620 }
621 
622 static int
623 proto_shell_run_command(struct proto_shell_state *state, struct blob_attr **tb)
624 {
625         static char *argv[64];
626         static char *env[32];
627 
628         if (state->sm == S_TEARDOWN || state->sm == S_SETUP_ABORT)
629                 return UBUS_STATUS_PERMISSION_DENIED;
630 
631         if (!tb[NOTIFY_COMMAND])
632                 goto error;
633 
634         if (!fill_string_list(tb[NOTIFY_COMMAND], argv, ARRAY_SIZE(argv)))
635                 goto error;
636 
637         if (!fill_string_list(tb[NOTIFY_ENV], env, ARRAY_SIZE(env)))
638                 goto error;
639 
640         netifd_start_process((const char **) argv, (char **) env, &state->proto_task);
641 
642         return 0;
643 
644 error:
645         return UBUS_STATUS_INVALID_ARGUMENT;
646 }
647 
648 static int
649 proto_shell_kill_command(struct proto_shell_state *state, struct blob_attr **tb)
650 {
651         unsigned int signal = ~0;
652 
653         if (tb[NOTIFY_SIGNAL])
654                 signal = blobmsg_get_u32(tb[NOTIFY_SIGNAL]);
655 
656         if (signal > 31)
657                 signal = SIGTERM;
658 
659         if (state->proto_task.uloop.pending) {
660                 if (signal == SIGTERM || signal == SIGKILL)
661                         state->proto_task_killed = true;
662                 kill(state->proto_task.uloop.pid, signal);
663         }
664 
665         return 0;
666 }
667 
668 static int
669 proto_shell_notify_error(struct proto_shell_state *state, struct blob_attr **tb)
670 {
671         struct blob_attr *cur;
672         char *data[16];
673         int n_data = 0;
674         int rem;
675 
676         if (!tb[NOTIFY_ERROR])
677                 return UBUS_STATUS_INVALID_ARGUMENT;
678 
679         blobmsg_for_each_attr(cur, tb[NOTIFY_ERROR], rem) {
680                 if (n_data + 1 == ARRAY_SIZE(data))
681                         goto error;
682 
683                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
684                         goto error;
685 
686                 if (!blobmsg_check_attr(cur, false))
687                         goto error;
688 
689                 data[n_data++] = blobmsg_data(cur);
690         }
691 
692         if (!n_data)
693                 goto error;
694 
695         interface_add_error(state->proto.iface, state->handler->proto.name,
696                         data[0], (const char **) &data[1], n_data - 1);
697 
698         return 0;
699 
700 error:
701         return UBUS_STATUS_INVALID_ARGUMENT;
702 }
703 
704 static int
705 proto_shell_block_restart(struct proto_shell_state *state, struct blob_attr **tb)
706 {
707         state->proto.iface->autostart = false;
708         return 0;
709 }
710 
711 static int
712 proto_shell_set_available(struct proto_shell_state *state, struct blob_attr **tb)
713 {
714         if (!tb[NOTIFY_AVAILABLE])
715                 return UBUS_STATUS_INVALID_ARGUMENT;
716 
717         interface_set_available(state->proto.iface, blobmsg_get_bool(tb[NOTIFY_AVAILABLE]));
718         return 0;
719 }
720 
721 static int
722 proto_shell_add_host_dependency(struct proto_shell_state *state, struct blob_attr **tb)
723 {
724         struct proto_shell_dependency *dep;
725         const char *ifname = tb[NOTIFY_IFNAME] ? blobmsg_data(tb[NOTIFY_IFNAME]) : "";
726         const char *host = tb[NOTIFY_HOST] ? blobmsg_data(tb[NOTIFY_HOST]) : "";
727 
728         if (state->sm == S_TEARDOWN || state->sm == S_SETUP_ABORT)
729                 return UBUS_STATUS_PERMISSION_DENIED;
730 
731         dep = calloc(1, sizeof(*dep) + strlen(ifname) + 1);
732         if (!dep)
733                 return UBUS_STATUS_UNKNOWN_ERROR;
734 
735         if (!host[0] && ifname[0]) {
736                 dep->any = true;
737         } else if (inet_pton(AF_INET, host, &dep->host) < 1) {
738                 if (inet_pton(AF_INET6, host, &dep->host) < 1) {
739                         free(dep);
740                         return UBUS_STATUS_INVALID_ARGUMENT;
741                 } else {
742                         dep->v6 = true;
743                 }
744         }
745 
746         dep->proto = state;
747         strcpy(dep->interface, ifname);
748 
749         dep->dep.cb = proto_shell_if_up_cb;
750         interface_add_user(&dep->dep, NULL);
751         list_add(&dep->list, &state->deps);
752         proto_shell_update_host_dep(dep);
753         if (!dep->dep.iface)
754                 return UBUS_STATUS_NOT_FOUND;
755 
756         return 0;
757 }
758 
759 static int
760 proto_shell_setup_failed(struct proto_shell_state *state)
761 {
762         int ret = 0;
763 
764         switch (state->sm) {
765         case S_IDLE:
766                 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
767                 /* fall through */
768         case S_SETUP:
769                 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
770                 break;
771         case S_SETUP_ABORT:
772         case S_TEARDOWN:
773         default:
774                 ret = UBUS_STATUS_PERMISSION_DENIED;
775                 break;
776         }
777         return ret;
778 }
779 
780 static int
781 proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
782 {
783         struct proto_shell_state *state;
784         struct blob_attr *tb[__NOTIFY_LAST];
785 
786         state = container_of(proto, struct proto_shell_state, proto);
787 
788         blobmsg_parse(notify_attr, __NOTIFY_LAST, tb, blob_data(attr), blob_len(attr));
789         if (!tb[NOTIFY_ACTION])
790                 return UBUS_STATUS_INVALID_ARGUMENT;
791 
792         switch(blobmsg_get_u32(tb[NOTIFY_ACTION])) {
793         case 0:
794                 return proto_shell_update_link(state, attr, tb);
795         case 1:
796                 return proto_shell_run_command(state, tb);
797         case 2:
798                 return proto_shell_kill_command(state, tb);
799         case 3:
800                 return proto_shell_notify_error(state, tb);
801         case 4:
802                 return proto_shell_block_restart(state, tb);
803         case 5:
804                 return proto_shell_set_available(state, tb);
805         case 6:
806                 return proto_shell_add_host_dependency(state, tb);
807         case 7:
808                 return proto_shell_setup_failed(state);
809         default:
810                 return UBUS_STATUS_INVALID_ARGUMENT;
811         }
812 }
813 
814 static void
815 proto_shell_checkup_timeout_cb(struct uloop_timeout *timeout)
816 {
817         struct proto_shell_state *state = container_of(timeout, struct
818                         proto_shell_state, checkup_timeout);
819         struct interface_proto_state *proto = &state->proto;
820         struct interface *iface = proto->iface;
821 
822         if (!iface->autostart)
823                 return;
824 
825         if (iface->state == IFS_UP)
826                 return;
827 
828         D(INTERFACE, "Interface '%s' is not up after %d sec\n",
829                         iface->name, state->checkup_interval);
830         proto_shell_handler(proto, PROTO_CMD_TEARDOWN, false);
831 }
832 
833 static void
834 proto_shell_checkup_attach(struct proto_shell_state *state,
835                 const struct blob_attr *attr)
836 {
837         struct blob_attr *tb;
838         struct blobmsg_policy checkup_policy = {
839                 .name = "checkup_interval",
840                 .type = BLOBMSG_TYPE_INT32
841         };
842 
843         blobmsg_parse(&checkup_policy, 1, &tb, blob_data(attr), blob_len(attr));
844         if (!tb) {
845                 state->checkup_interval = -1;
846                 state->checkup_timeout.cb = NULL;
847         } else {
848                 state->checkup_interval = blobmsg_get_u32(tb);
849                 state->checkup_timeout.cb = proto_shell_checkup_timeout_cb;
850         }
851 }
852 
853 static struct interface_proto_state *
854 proto_shell_attach(const struct proto_handler *h, struct interface *iface,
855                    struct blob_attr *attr)
856 {
857         struct proto_shell_state *state;
858 
859         state = calloc(1, sizeof(*state));
860         if (!state)
861                 return NULL;
862 
863         INIT_LIST_HEAD(&state->deps);
864 
865         state->config = malloc(blob_pad_len(attr));
866         if (!state->config)
867                 goto error;
868 
869         memcpy(state->config, attr, blob_pad_len(attr));
870         proto_shell_checkup_attach(state, state->config);
871         state->proto.free = proto_shell_free;
872         state->proto.notify = proto_shell_notify;
873         state->proto.cb = proto_shell_handler;
874         state->teardown_timeout.cb = proto_shell_teardown_timeout_cb;
875         state->script_task.cb = proto_shell_script_cb;
876         state->script_task.dir_fd = proto_fd;
877         state->script_task.log_prefix = iface->name;
878         state->proto_task.cb = proto_shell_task_cb;
879         state->proto_task.dir_fd = proto_fd;
880         state->proto_task.log_prefix = iface->name;
881         state->handler = container_of(h, struct proto_shell_handler, proto);
882 
883         return &state->proto;
884 
885 error:
886         free(state);
887         return NULL;
888 }
889 
890 static void
891 proto_shell_add_handler(const char *script, const char *name, json_object *obj)
892 {
893         struct proto_shell_handler *handler;
894         struct proto_handler *proto;
895         json_object *config, *tmp;
896         char *proto_name, *script_name;
897 
898         handler = calloc_a(sizeof(*handler),
899                            &proto_name, strlen(name) + 1,
900                            &script_name, strlen(script) + 1);
901         if (!handler)
902                 return;
903 
904         handler->script_name = strcpy(script_name, script);
905 
906         proto = &handler->proto;
907         proto->name = strcpy(proto_name, name);
908         proto->config_params = &handler->config;
909         proto->attach = proto_shell_attach;
910 
911         tmp = json_get_field(obj, "no-device", json_type_boolean);
912         if (tmp && json_object_get_boolean(tmp))
913                 handler->proto.flags |= PROTO_FLAG_NODEV;
914 
915         tmp = json_get_field(obj, "no-proto-task", json_type_boolean);
916         if (tmp && json_object_get_boolean(tmp))
917                 handler->proto.flags |= PROTO_FLAG_NO_TASK;
918 
919         tmp = json_get_field(obj, "available", json_type_boolean);
920         if (tmp && json_object_get_boolean(tmp))
921                 handler->proto.flags |= PROTO_FLAG_INIT_AVAILABLE;
922 
923         tmp = json_get_field(obj, "renew-handler", json_type_boolean);
924         if (tmp && json_object_get_boolean(tmp))
925                 handler->proto.flags |= PROTO_FLAG_RENEW_AVAILABLE;
926 
927         tmp = json_get_field(obj, "lasterror", json_type_boolean);
928         if (tmp && json_object_get_boolean(tmp))
929                 handler->proto.flags |= PROTO_FLAG_LASTERROR;
930 
931         tmp = json_get_field(obj, "teardown-on-l3-link-down", json_type_boolean);
932         if (tmp && json_object_get_boolean(tmp))
933                 handler->proto.flags |= PROTO_FLAG_TEARDOWN_ON_L3_LINK_DOWN;
934 
935         config = json_get_field(obj, "config", json_type_array);
936         if (config)
937                 handler->config_buf = netifd_handler_parse_config(&handler->config, config);
938 
939         DPRINTF("Add handler for script %s: %s\n", script, proto->name);
940         add_proto_handler(proto);
941 }
942 
943 void proto_shell_init(void)
944 {
945         proto_fd = netifd_open_subdir("proto");
946         if (proto_fd < 0)
947                 return;
948 
949         netifd_init_script_handlers(proto_fd, proto_shell_add_handler);
950 }
951 

This page was automatically generated by LXR 0.3.1.  •  OpenWrt