interface-ip: DNS name server sorting support in resolv.conf.auto
[project/netifd.git] / 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                 case S_SETUP_ABORT:
185                 case S_TEARDOWN:
186                 case S_SETUP:
187                         return 0;
188
189                 default:
190                         return -1;
191                 }
192         } else if (cmd == PROTO_CMD_RENEW) {
193                 if (!(handler->proto.flags & PROTO_FLAG_RENEW_AVAILABLE))
194                         return 0;
195
196                 if (state->script_task.uloop.pending) {
197                         state->renew_pending = true;
198                         return 0;
199                 }
200
201                 state->renew_pending = false;
202                 action = "renew";
203         } else {
204                 switch (state->sm) {
205                 case S_SETUP:
206                         if (state->script_task.uloop.pending) {
207                                 uloop_timeout_set(&state->teardown_timeout, 1000);
208                                 kill(state->script_task.uloop.pid, SIGTERM);
209                                 if (state->proto_task.uloop.pending)
210                                         kill(state->proto_task.uloop.pid, SIGTERM);
211                                 state->renew_pending = false;
212                                 state->sm = S_SETUP_ABORT;
213                                 return 0;
214                         }
215                 /* fall through if no script task is running */
216                 case S_IDLE:
217                         action = "teardown";
218                         state->renew_pending = false;
219                         state->sm = S_TEARDOWN;
220                         if (state->last_error >= 0) {
221                                 snprintf(error_buf, sizeof(error_buf), "ERROR=%d", state->last_error);
222                                 envp[j++] = error_buf;
223                         }
224                         uloop_timeout_set(&state->teardown_timeout, 5000);
225                         break;
226
227                 case S_TEARDOWN:
228                         return 0;
229
230                 default:
231                         return -1;
232                 }
233         }
234
235         D(INTERFACE, "run %s for interface '%s'\n", action, proto->iface->name);
236         config = blobmsg_format_json(state->config, true);
237         if (!config)
238                 return -1;
239
240         argv[i++] = handler->script_name;
241         argv[i++] = handler->proto.name;
242         argv[i++] = action;
243         argv[i++] = proto->iface->name;
244         argv[i++] = config;
245         if (proto->iface->main_dev.dev)
246                 argv[i++] = proto->iface->main_dev.dev->ifname;
247         argv[i] = NULL;
248         envp[j] = NULL;
249
250         ret = netifd_start_process(argv, envp, proc);
251         free(config);
252
253         return ret;
254 }
255
256 static void
257 proto_shell_if_up_cb(struct interface_user *dep, struct interface *iface,
258                      enum interface_event ev)
259 {
260         struct proto_shell_dependency *pdep;
261
262         if (ev != IFEV_UP && ev != IFEV_UPDATE)
263                 return;
264
265         pdep = container_of(dep, struct proto_shell_dependency, dep);
266         proto_shell_update_host_dep(pdep);
267 }
268
269 static void
270 proto_shell_if_down_cb(struct interface_user *dep, struct interface *iface,
271                        enum interface_event ev)
272 {
273         struct proto_shell_dependency *pdep;
274         struct proto_shell_state *state;
275
276         if (ev == IFEV_UP || ev == IFEV_UPDATE)
277                 return;
278
279         pdep = container_of(dep, struct proto_shell_dependency, dep);
280         interface_remove_user(dep);
281         dep->cb = proto_shell_if_up_cb;
282         interface_add_user(dep, NULL);
283
284         state = pdep->proto;
285         if (state->sm == S_IDLE) {
286                 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
287                 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
288         }
289 }
290
291 static void
292 proto_shell_task_finish(struct proto_shell_state *state,
293                         struct netifd_process *task)
294 {
295         switch (state->sm) {
296         case S_IDLE:
297                 if (task == &state->proto_task)
298                         state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
299                 /* fall through */
300         case S_SETUP:
301                 if (task == &state->proto_task)
302                         proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN,
303                                             false);
304                 else if (task == &state->script_task) {
305                         if (state->renew_pending)
306                                 proto_shell_handler(&state->proto,
307                                                     PROTO_CMD_RENEW, false);
308                         else if (!(state->handler->proto.flags & PROTO_FLAG_NO_TASK) &&
309                                  !state->proto_task.uloop.pending &&
310                                  state->sm == S_SETUP)
311                                 proto_shell_handler(&state->proto,
312                                                     PROTO_CMD_TEARDOWN,
313                                                     false);
314
315                         /* check up status after setup attempt by this script_task */
316                         if (state->sm == S_SETUP && state->checkup_interval > 0) {
317                                 uloop_timeout_set(&state->checkup_timeout,
318                                                   state->checkup_interval * 1000);
319                         }
320                 }
321                 break;
322
323         case S_SETUP_ABORT:
324                 if (state->script_task.uloop.pending ||
325                     state->proto_task.uloop.pending)
326                         break;
327
328                 /* completed aborting all tasks, now idle */
329                 uloop_timeout_cancel(&state->teardown_timeout);
330                 uloop_timeout_cancel(&state->checkup_timeout);
331                 state->sm = S_IDLE;
332                 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
333                 break;
334
335         case S_TEARDOWN:
336                 if (state->script_task.uloop.pending)
337                         break;
338
339                 if (state->proto_task.uloop.pending) {
340                         if (!state->proto_task_killed)
341                                 kill(state->proto_task.uloop.pid, SIGTERM);
342                         break;
343                 }
344
345                 /* completed tearing down all tasks, now idle */
346                 uloop_timeout_cancel(&state->teardown_timeout);
347                 uloop_timeout_cancel(&state->checkup_timeout);
348                 state->sm = S_IDLE;
349                 state->proto.proto_event(&state->proto, IFPEV_DOWN);
350                 break;
351         }
352 }
353
354 static void
355 proto_shell_teardown_timeout_cb(struct uloop_timeout *timeout)
356 {
357         struct proto_shell_state *state;
358
359         state = container_of(timeout, struct proto_shell_state, teardown_timeout);
360
361         netifd_kill_process(&state->script_task);
362         netifd_kill_process(&state->proto_task);
363         proto_shell_task_finish(state, NULL);
364 }
365
366 static void
367 proto_shell_script_cb(struct netifd_process *p, int ret)
368 {
369         struct proto_shell_state *state;
370
371         state = container_of(p, struct proto_shell_state, script_task);
372         proto_shell_task_finish(state, p);
373 }
374
375 static void
376 proto_shell_task_cb(struct netifd_process *p, int ret)
377 {
378         struct proto_shell_state *state;
379
380         state = container_of(p, struct proto_shell_state, proto_task);
381
382         if (state->sm == S_IDLE || state->sm == S_SETUP)
383                 state->last_error = WEXITSTATUS(ret);
384
385         proto_shell_task_finish(state, p);
386 }
387
388 static void
389 proto_shell_free(struct interface_proto_state *proto)
390 {
391         struct proto_shell_state *state;
392
393         state = container_of(proto, struct proto_shell_state, proto);
394         uloop_timeout_cancel(&state->teardown_timeout);
395         uloop_timeout_cancel(&state->checkup_timeout);
396         proto_shell_clear_host_dep(state);
397         netifd_kill_process(&state->script_task);
398         netifd_kill_process(&state->proto_task);
399         free(state->config);
400         free(state);
401 }
402
403 static void
404 proto_shell_parse_route_list(struct interface *iface, struct blob_attr *attr,
405                              bool v6)
406 {
407         struct blob_attr *cur;
408         int rem;
409
410         blobmsg_for_each_attr(cur, attr, rem) {
411                 if (blobmsg_type(cur) != BLOBMSG_TYPE_TABLE) {
412                         DPRINTF("Ignore wrong route type: %d\n", blobmsg_type(cur));
413                         continue;
414                 }
415
416                 interface_ip_add_route(iface, cur, v6);
417         }
418 }
419
420 static void
421 proto_shell_parse_data(struct interface *iface, struct blob_attr *attr)
422 {
423         struct blob_attr *cur;
424         int rem;
425
426         blobmsg_for_each_attr(cur, attr, rem)
427                 interface_add_data(iface, cur);
428 }
429
430 static struct device *
431 proto_shell_create_tunnel(const char *name, struct blob_attr *attr)
432 {
433         struct device *dev;
434         struct blob_buf b;
435
436         memset(&b, 0, sizeof(b));
437         blob_buf_init(&b, 0);
438         blob_put(&b, 0, blobmsg_data(attr), blobmsg_data_len(attr));
439         dev = device_create(name, &tunnel_device_type, blob_data(b.head));
440         blob_buf_free(&b);
441
442         return dev;
443 }
444
445 enum {
446         NOTIFY_ACTION,
447         NOTIFY_ERROR,
448         NOTIFY_COMMAND,
449         NOTIFY_ENV,
450         NOTIFY_SIGNAL,
451         NOTIFY_AVAILABLE,
452         NOTIFY_LINK_UP,
453         NOTIFY_IFNAME,
454         NOTIFY_ADDR_EXT,
455         NOTIFY_ROUTES,
456         NOTIFY_ROUTES6,
457         NOTIFY_TUNNEL,
458         NOTIFY_DATA,
459         NOTIFY_KEEP,
460         NOTIFY_HOST,
461         NOTIFY_DNS,
462         NOTIFY_DNS_SEARCH,
463         __NOTIFY_LAST
464 };
465
466 static const struct blobmsg_policy notify_attr[__NOTIFY_LAST] = {
467         [NOTIFY_ACTION] = { .name = "action", .type = BLOBMSG_TYPE_INT32 },
468         [NOTIFY_ERROR] = { .name = "error", .type = BLOBMSG_TYPE_ARRAY },
469         [NOTIFY_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_ARRAY },
470         [NOTIFY_ENV] = { .name = "env", .type = BLOBMSG_TYPE_ARRAY },
471         [NOTIFY_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
472         [NOTIFY_AVAILABLE] = { .name = "available", .type = BLOBMSG_TYPE_BOOL },
473         [NOTIFY_LINK_UP] = { .name = "link-up", .type = BLOBMSG_TYPE_BOOL },
474         [NOTIFY_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
475         [NOTIFY_ADDR_EXT] = { .name = "address-external", .type = BLOBMSG_TYPE_BOOL },
476         [NOTIFY_ROUTES] = { .name = "routes", .type = BLOBMSG_TYPE_ARRAY },
477         [NOTIFY_ROUTES6] = { .name = "routes6", .type = BLOBMSG_TYPE_ARRAY },
478         [NOTIFY_TUNNEL] = { .name = "tunnel", .type = BLOBMSG_TYPE_TABLE },
479         [NOTIFY_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
480         [NOTIFY_KEEP] = { .name = "keep", .type = BLOBMSG_TYPE_BOOL },
481         [NOTIFY_HOST] = { .name = "host", .type = BLOBMSG_TYPE_STRING },
482         [NOTIFY_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
483         [NOTIFY_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
484 };
485
486 static int
487 proto_shell_update_link(struct proto_shell_state *state, struct blob_attr *data, struct blob_attr **tb)
488 {
489         struct interface *iface = state->proto.iface;
490         struct blob_attr *cur;
491         struct device *dev;
492         const char *devname;
493         int dev_create = 1;
494         bool addr_ext = false;
495         bool keep = false;
496         bool up;
497
498         if (state->sm == S_TEARDOWN || state->sm == S_SETUP_ABORT)
499                 return UBUS_STATUS_PERMISSION_DENIED;
500
501         if (!tb[NOTIFY_LINK_UP])
502                 return UBUS_STATUS_INVALID_ARGUMENT;
503
504         up = blobmsg_get_bool(tb[NOTIFY_LINK_UP]);
505         if (!up) {
506                 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
507                 return 0;
508         }
509
510         if ((cur = tb[NOTIFY_KEEP]) != NULL)
511                 keep = blobmsg_get_bool(cur);
512
513         if ((cur = tb[NOTIFY_ADDR_EXT]) != NULL) {
514                 addr_ext = blobmsg_get_bool(cur);
515                 if (addr_ext)
516                         dev_create = 2;
517         }
518
519         if (iface->state != IFS_UP || !iface->l3_dev.dev)
520                 keep = false;
521
522         if (!keep) {
523                 dev = iface->main_dev.dev;
524                 if (tb[NOTIFY_IFNAME]) {
525                         keep = false;
526                         devname = blobmsg_data(tb[NOTIFY_IFNAME]);
527                         if (tb[NOTIFY_TUNNEL])
528                                 dev = proto_shell_create_tunnel(devname, tb[NOTIFY_TUNNEL]);
529                         else
530                                 dev = device_get(devname, dev_create);
531                 }
532
533                 if (!dev)
534                         return UBUS_STATUS_INVALID_ARGUMENT;
535
536                 interface_set_l3_dev(iface, dev);
537                 if (device_claim(&iface->l3_dev) < 0)
538                         return UBUS_STATUS_UNKNOWN_ERROR;
539
540                 device_set_present(dev, true);
541
542                 interface_update_start(iface);
543         }
544
545         proto_apply_ip_settings(iface, data, addr_ext);
546
547         if ((cur = tb[NOTIFY_ROUTES]) != NULL)
548                 proto_shell_parse_route_list(state->proto.iface, cur, false);
549
550         if ((cur = tb[NOTIFY_ROUTES6]) != NULL)
551                 proto_shell_parse_route_list(state->proto.iface, cur, true);
552
553         if ((cur = tb[NOTIFY_DNS]))
554                 interface_add_dns_server_list(&iface->proto_ip, cur);
555
556         if ((cur = tb[NOTIFY_DNS_SEARCH]))
557                 interface_add_dns_search_list(&iface->proto_ip, cur);
558
559         if ((cur = tb[NOTIFY_DATA]))
560                 proto_shell_parse_data(state->proto.iface, cur);
561
562         interface_update_complete(state->proto.iface);
563
564         if ((state->sm != S_SETUP_ABORT) && (state->sm != S_TEARDOWN)) {
565                 if (!keep)
566                         state->proto.proto_event(&state->proto, IFPEV_UP);
567                 state->sm = S_IDLE;
568         }
569
570         return 0;
571 }
572
573 static bool
574 fill_string_list(struct blob_attr *attr, char **argv, int max)
575 {
576         struct blob_attr *cur;
577         int argc = 0;
578         int rem;
579
580         if (!attr)
581                 goto out;
582
583         blobmsg_for_each_attr(cur, attr, rem) {
584                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
585                         return false;
586
587                 if (!blobmsg_check_attr(cur, NULL))
588                         return false;
589
590                 argv[argc++] = blobmsg_data(cur);
591                 if (argc == max - 1)
592                         return false;
593         }
594
595 out:
596         argv[argc] = NULL;
597         return true;
598 }
599
600 static int
601 proto_shell_run_command(struct proto_shell_state *state, struct blob_attr **tb)
602 {
603         static char *argv[64];
604         static char *env[32];
605
606         if (state->sm == S_TEARDOWN || state->sm == S_SETUP_ABORT)
607                 return UBUS_STATUS_PERMISSION_DENIED;
608
609         if (!tb[NOTIFY_COMMAND])
610                 goto error;
611
612         if (!fill_string_list(tb[NOTIFY_COMMAND], argv, ARRAY_SIZE(argv)))
613                 goto error;
614
615         if (!fill_string_list(tb[NOTIFY_ENV], env, ARRAY_SIZE(env)))
616                 goto error;
617
618         netifd_start_process((const char **) argv, (char **) env, &state->proto_task);
619
620         return 0;
621
622 error:
623         return UBUS_STATUS_INVALID_ARGUMENT;
624 }
625
626 static int
627 proto_shell_kill_command(struct proto_shell_state *state, struct blob_attr **tb)
628 {
629         unsigned int signal = ~0;
630
631         if (tb[NOTIFY_SIGNAL])
632                 signal = blobmsg_get_u32(tb[NOTIFY_SIGNAL]);
633
634         if (signal > 31)
635                 signal = SIGTERM;
636
637         if (state->proto_task.uloop.pending) {
638                 if (signal == SIGTERM || signal == SIGKILL)
639                         state->proto_task_killed = true;
640                 kill(state->proto_task.uloop.pid, signal);
641         }
642
643         return 0;
644 }
645
646 static int
647 proto_shell_notify_error(struct proto_shell_state *state, struct blob_attr **tb)
648 {
649         struct blob_attr *cur;
650         char *data[16];
651         int n_data = 0;
652         int rem;
653
654         if (!tb[NOTIFY_ERROR])
655                 return UBUS_STATUS_INVALID_ARGUMENT;
656
657         blobmsg_for_each_attr(cur, tb[NOTIFY_ERROR], rem) {
658                 if (n_data + 1 == ARRAY_SIZE(data))
659                         goto error;
660
661                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
662                         goto error;
663
664                 if (!blobmsg_check_attr(cur, NULL))
665                         goto error;
666
667                 data[n_data++] = blobmsg_data(cur);
668         }
669
670         if (!n_data)
671                 goto error;
672
673         interface_add_error(state->proto.iface, state->handler->proto.name,
674                         data[0], (const char **) &data[1], n_data - 1);
675
676         return 0;
677
678 error:
679         return UBUS_STATUS_INVALID_ARGUMENT;
680 }
681
682 static int
683 proto_shell_block_restart(struct proto_shell_state *state, struct blob_attr **tb)
684 {
685         state->proto.iface->autostart = false;
686         return 0;
687 }
688
689 static int
690 proto_shell_set_available(struct proto_shell_state *state, struct blob_attr **tb)
691 {
692         if (!tb[NOTIFY_AVAILABLE])
693                 return UBUS_STATUS_INVALID_ARGUMENT;
694
695         interface_set_available(state->proto.iface, blobmsg_get_bool(tb[NOTIFY_AVAILABLE]));
696         return 0;
697 }
698
699 static int
700 proto_shell_add_host_dependency(struct proto_shell_state *state, struct blob_attr **tb)
701 {
702         struct proto_shell_dependency *dep;
703         const char *ifname = tb[NOTIFY_IFNAME] ? blobmsg_data(tb[NOTIFY_IFNAME]) : "";
704         const char *host = tb[NOTIFY_HOST] ? blobmsg_data(tb[NOTIFY_HOST]) : "";
705
706         if (state->sm == S_TEARDOWN || state->sm == S_SETUP_ABORT)
707                 return UBUS_STATUS_PERMISSION_DENIED;
708
709         dep = calloc(1, sizeof(*dep) + strlen(ifname) + 1);
710         if (!dep)
711                 return UBUS_STATUS_UNKNOWN_ERROR;
712
713         if (!host[0] && ifname[0]) {
714                 dep->any = true;
715         } else if (inet_pton(AF_INET, host, &dep->host) < 1) {
716                 if (inet_pton(AF_INET6, host, &dep->host) < 1) {
717                         free(dep);
718                         return UBUS_STATUS_INVALID_ARGUMENT;
719                 } else {
720                         dep->v6 = true;
721                 }
722         }
723
724         dep->proto = state;
725         strcpy(dep->interface, ifname);
726
727         dep->dep.cb = proto_shell_if_up_cb;
728         interface_add_user(&dep->dep, NULL);
729         list_add(&dep->list, &state->deps);
730         proto_shell_update_host_dep(dep);
731         if (!dep->dep.iface)
732                 return UBUS_STATUS_NOT_FOUND;
733
734         return 0;
735 }
736
737 static int
738 proto_shell_setup_failed(struct proto_shell_state *state)
739 {
740         int ret = 0;
741
742         switch (state->sm) {
743         case S_IDLE:
744                 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
745                 /* fall through */
746         case S_SETUP:
747                 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
748                 break;
749         case S_SETUP_ABORT:
750         case S_TEARDOWN:
751         default:
752                 ret = UBUS_STATUS_PERMISSION_DENIED;
753                 break;
754         }
755         return ret;
756 }
757
758 static int
759 proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
760 {
761         struct proto_shell_state *state;
762         struct blob_attr *tb[__NOTIFY_LAST];
763
764         state = container_of(proto, struct proto_shell_state, proto);
765
766         blobmsg_parse(notify_attr, __NOTIFY_LAST, tb, blob_data(attr), blob_len(attr));
767         if (!tb[NOTIFY_ACTION])
768                 return UBUS_STATUS_INVALID_ARGUMENT;
769
770         switch(blobmsg_get_u32(tb[NOTIFY_ACTION])) {
771         case 0:
772                 return proto_shell_update_link(state, attr, tb);
773         case 1:
774                 return proto_shell_run_command(state, tb);
775         case 2:
776                 return proto_shell_kill_command(state, tb);
777         case 3:
778                 return proto_shell_notify_error(state, tb);
779         case 4:
780                 return proto_shell_block_restart(state, tb);
781         case 5:
782                 return proto_shell_set_available(state, tb);
783         case 6:
784                 return proto_shell_add_host_dependency(state, tb);
785         case 7:
786                 return proto_shell_setup_failed(state);
787         default:
788                 return UBUS_STATUS_INVALID_ARGUMENT;
789         }
790 }
791
792 static void
793 proto_shell_checkup_timeout_cb(struct uloop_timeout *timeout)
794 {
795         struct proto_shell_state *state = container_of(timeout, struct
796                         proto_shell_state, checkup_timeout);
797         struct interface_proto_state *proto = &state->proto;
798         struct interface *iface = proto->iface;
799
800         if (!iface->autostart)
801                 return;
802
803         if (iface->state == IFS_UP)
804                 return;
805
806         D(INTERFACE, "Interface '%s' is not up after %d sec\n",
807                         iface->name, state->checkup_interval);
808         proto_shell_handler(proto, PROTO_CMD_TEARDOWN, false);
809 }
810
811 static void
812 proto_shell_checkup_attach(struct proto_shell_state *state,
813                 const struct blob_attr *attr)
814 {
815         struct blob_attr *tb;
816         struct blobmsg_policy checkup_policy = {
817                 .name = "checkup_interval",
818                 .type = BLOBMSG_TYPE_INT32
819         };
820
821         blobmsg_parse(&checkup_policy, 1, &tb, blob_data(attr), blob_len(attr));
822         if (!tb) {
823                 state->checkup_interval = -1;
824                 state->checkup_timeout.cb = NULL;
825         } else {
826                 state->checkup_interval = blobmsg_get_u32(tb);
827                 state->checkup_timeout.cb = proto_shell_checkup_timeout_cb;
828         }
829 }
830
831 static struct interface_proto_state *
832 proto_shell_attach(const struct proto_handler *h, struct interface *iface,
833                    struct blob_attr *attr)
834 {
835         struct proto_shell_state *state;
836
837         state = calloc(1, sizeof(*state));
838         if (!state)
839                 return NULL;
840
841         INIT_LIST_HEAD(&state->deps);
842
843         state->config = malloc(blob_pad_len(attr));
844         if (!state->config)
845                 goto error;
846
847         memcpy(state->config, attr, blob_pad_len(attr));
848         proto_shell_checkup_attach(state, state->config);
849         state->proto.free = proto_shell_free;
850         state->proto.notify = proto_shell_notify;
851         state->proto.cb = proto_shell_handler;
852         state->teardown_timeout.cb = proto_shell_teardown_timeout_cb;
853         state->script_task.cb = proto_shell_script_cb;
854         state->script_task.dir_fd = proto_fd;
855         state->script_task.log_prefix = iface->name;
856         state->proto_task.cb = proto_shell_task_cb;
857         state->proto_task.dir_fd = proto_fd;
858         state->proto_task.log_prefix = iface->name;
859         state->handler = container_of(h, struct proto_shell_handler, proto);
860
861         return &state->proto;
862
863 error:
864         free(state);
865         return NULL;
866 }
867
868 static void
869 proto_shell_add_handler(const char *script, const char *name, json_object *obj)
870 {
871         struct proto_shell_handler *handler;
872         struct proto_handler *proto;
873         json_object *config, *tmp;
874         char *proto_name, *script_name;
875
876         handler = calloc_a(sizeof(*handler),
877                            &proto_name, strlen(name) + 1,
878                            &script_name, strlen(script) + 1);
879         if (!handler)
880                 return;
881
882         handler->script_name = strcpy(script_name, script);
883
884         proto = &handler->proto;
885         proto->name = strcpy(proto_name, name);
886         proto->config_params = &handler->config;
887         proto->attach = proto_shell_attach;
888
889         tmp = json_get_field(obj, "no-device", json_type_boolean);
890         if (tmp && json_object_get_boolean(tmp))
891                 handler->proto.flags |= PROTO_FLAG_NODEV;
892
893         tmp = json_get_field(obj, "no-proto-task", json_type_boolean);
894         if (tmp && json_object_get_boolean(tmp))
895                 handler->proto.flags |= PROTO_FLAG_NO_TASK;
896
897         tmp = json_get_field(obj, "available", json_type_boolean);
898         if (tmp && json_object_get_boolean(tmp))
899                 handler->proto.flags |= PROTO_FLAG_INIT_AVAILABLE;
900
901         tmp = json_get_field(obj, "renew-handler", json_type_boolean);
902         if (tmp && json_object_get_boolean(tmp))
903                 handler->proto.flags |= PROTO_FLAG_RENEW_AVAILABLE;
904
905         tmp = json_get_field(obj, "lasterror", json_type_boolean);
906         if (tmp && json_object_get_boolean(tmp))
907                 handler->proto.flags |= PROTO_FLAG_LASTERROR;
908
909         tmp = json_get_field(obj, "teardown-on-l3-link-down", json_type_boolean);
910         if (tmp && json_object_get_boolean(tmp))
911                 handler->proto.flags |= PROTO_FLAG_TEARDOWN_ON_L3_LINK_DOWN;
912
913         config = json_get_field(obj, "config", json_type_array);
914         if (config)
915                 handler->config_buf = netifd_handler_parse_config(&handler->config, config);
916
917         DPRINTF("Add handler for script %s: %s\n", script, proto->name);
918         add_proto_handler(proto);
919 }
920
921 void proto_shell_init(void)
922 {
923         proto_fd = netifd_open_subdir("proto");
924         if (proto_fd < 0)
925                 return;
926
927         netifd_init_script_handlers(proto_fd, proto_shell_add_handler);
928 }