netifd: GRE tunnel support
[oweals/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         char *interface;
55         struct proto_shell_state *proto;
56         struct interface_user dep;
57
58         union if_addr host;
59         bool v6;
60 };
61
62 struct proto_shell_state {
63         struct interface_proto_state proto;
64         struct proto_shell_handler *handler;
65         struct blob_attr *config;
66
67         struct uloop_timeout teardown_timeout;
68
69         struct netifd_process script_task;
70         struct netifd_process proto_task;
71
72         enum proto_shell_sm sm;
73         bool proto_task_killed;
74         bool renew_pending;
75
76         int last_error;
77
78         struct list_head deps;
79 };
80
81 static void
82 proto_shell_check_dependencies(struct proto_shell_state *state)
83 {
84         struct proto_shell_dependency *dep;
85         bool available = true;
86
87         list_for_each_entry(dep, &state->deps, list) {
88                 if (dep->dep.iface)
89                         continue;
90
91                 available = false;
92                 break;
93         }
94
95         interface_set_available(state->proto.iface, available);
96 }
97
98 static void
99 proto_shell_if_up_cb(struct interface_user *dep, struct interface *iface,
100                      enum interface_event ev);
101 static void
102 proto_shell_if_down_cb(struct interface_user *dep, struct interface *iface,
103                        enum interface_event ev);
104
105 static void
106 proto_shell_update_host_dep(struct proto_shell_dependency *dep)
107 {
108         struct interface *iface = NULL;
109
110         if (dep->dep.iface)
111                 goto out;
112
113         if (dep->interface[0])
114                 iface = vlist_find(&interfaces, dep->interface, iface, node);
115
116         iface = interface_ip_add_target_route(&dep->host, dep->v6, iface);
117         if (!iface)
118                 goto out;
119
120         interface_remove_user(&dep->dep);
121         dep->dep.cb = proto_shell_if_down_cb;
122         interface_add_user(&dep->dep, iface);
123
124 out:
125         proto_shell_check_dependencies(dep->proto);
126 }
127
128 static void
129 proto_shell_clear_host_dep(struct proto_shell_state *state)
130 {
131         struct proto_shell_dependency *dep, *tmp;
132
133         list_for_each_entry_safe(dep, tmp, &state->deps, list) {
134                 interface_remove_user(&dep->dep);
135                 list_del(&dep->list);
136                 free(dep);
137         }
138 }
139
140 static int
141 proto_shell_handler(struct interface_proto_state *proto,
142                     enum interface_proto_cmd cmd, bool force)
143 {
144         struct proto_shell_state *state;
145         struct proto_shell_handler *handler;
146         struct netifd_process *proc;
147         static char error_buf[32];
148         const char *argv[7];
149         char *envp[2];
150         const char *action;
151         char *config;
152         int ret, i = 0, j = 0;
153
154         state = container_of(proto, struct proto_shell_state, proto);
155         handler = state->handler;
156         proc = &state->script_task;
157
158         if (cmd == PROTO_CMD_SETUP) {
159                 action = "setup";
160                 state->last_error = -1;
161                 proto_shell_clear_host_dep(state);
162                 state->sm = S_SETUP;
163         } else if (cmd == PROTO_CMD_RENEW) {
164                 if (!(handler->proto.flags & PROTO_FLAG_RENEW_AVAILABLE))
165                         return 0;
166
167                 if (state->script_task.uloop.pending) {
168                         state->renew_pending = true;
169                         return 0;
170                 }
171
172                 state->renew_pending = false;
173                 action = "renew";
174         } else {
175                 if (state->sm == S_TEARDOWN)
176                         return 0;
177
178                 state->renew_pending = false;
179                 if (state->script_task.uloop.pending) {
180                         if (state->sm != S_SETUP_ABORT) {
181                                 uloop_timeout_set(&state->teardown_timeout, 1000);
182                                 kill(state->script_task.uloop.pid, SIGTERM);
183                                 if (state->proto_task.uloop.pending)
184                                         kill(state->proto_task.uloop.pid, SIGTERM);
185                                 state->sm = S_SETUP_ABORT;
186                         }
187                         return 0;
188                 }
189
190                 action = "teardown";
191                 state->sm = S_TEARDOWN;
192                 if (state->last_error >= 0) {
193                         snprintf(error_buf, sizeof(error_buf), "ERROR=%d", state->last_error);
194                         envp[j++] = error_buf;
195                 }
196                 uloop_timeout_set(&state->teardown_timeout, 5000);
197         }
198
199         D(INTERFACE, "run %s for interface '%s'\n", action, proto->iface->name);
200         config = blobmsg_format_json(state->config, true);
201         if (!config)
202                 return -1;
203
204         argv[i++] = handler->script_name;
205         argv[i++] = handler->proto.name;
206         argv[i++] = action;
207         argv[i++] = proto->iface->name;
208         argv[i++] = config;
209         if (proto->iface->main_dev.dev)
210                 argv[i++] = proto->iface->main_dev.dev->ifname;
211         argv[i] = NULL;
212         envp[j] = NULL;
213
214         ret = netifd_start_process(argv, envp, proc);
215         free(config);
216
217         return ret;
218 }
219
220 static void
221 proto_shell_if_up_cb(struct interface_user *dep, struct interface *iface,
222                      enum interface_event ev)
223 {
224         struct proto_shell_dependency *pdep;
225
226         if (ev != IFEV_UP && ev != IFEV_UPDATE)
227                 return;
228
229         pdep = container_of(dep, struct proto_shell_dependency, dep);
230         proto_shell_update_host_dep(pdep);
231 }
232
233 static void
234 proto_shell_if_down_cb(struct interface_user *dep, struct interface *iface,
235                        enum interface_event ev)
236 {
237         struct proto_shell_dependency *pdep;
238         struct proto_shell_state *state;
239
240         if (ev == IFEV_UP || ev == IFEV_UPDATE)
241                 return;
242
243         pdep = container_of(dep, struct proto_shell_dependency, dep);
244         interface_remove_user(dep);
245         dep->cb = proto_shell_if_up_cb;
246         interface_add_user(dep, NULL);
247
248         state = pdep->proto;
249         if (state->sm == S_IDLE) {
250                 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
251                 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
252         }
253 }
254
255 static void
256 proto_shell_task_finish(struct proto_shell_state *state,
257                         struct netifd_process *task)
258 {
259         switch (state->sm) {
260         case S_IDLE:
261                 if (task == &state->proto_task)
262                         state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
263                 /* fall through */
264         case S_SETUP:
265                 if (task == &state->proto_task)
266                         proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN,
267                                             false);
268                 if (task == &state->script_task && state->renew_pending)
269                         proto_shell_handler(&state->proto, PROTO_CMD_RENEW,
270                                             false);
271                 break;
272
273         case S_SETUP_ABORT:
274                 if (state->script_task.uloop.pending ||
275                     state->proto_task.uloop.pending)
276                         break;
277
278                 uloop_timeout_cancel(&state->teardown_timeout);
279                 state->sm = S_IDLE;
280                 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
281                 break;
282
283         case S_TEARDOWN:
284                 if (state->script_task.uloop.pending)
285                         break;
286
287                 if (state->proto_task.uloop.pending) {
288                         if (!state->proto_task_killed)
289                                 kill(state->proto_task.uloop.pid, SIGTERM);
290                         break;
291                 }
292
293                 uloop_timeout_cancel(&state->teardown_timeout);
294                 state->sm = S_IDLE;
295                 state->proto.proto_event(&state->proto, IFPEV_DOWN);
296                 break;
297         }
298 }
299
300 static void
301 proto_shell_teardown_timeout_cb(struct uloop_timeout *timeout)
302 {
303         struct proto_shell_state *state;
304
305         state = container_of(timeout, struct proto_shell_state, teardown_timeout);
306
307         netifd_kill_process(&state->script_task);
308         netifd_kill_process(&state->proto_task);
309         proto_shell_task_finish(state, NULL);
310 }
311
312 static void
313 proto_shell_script_cb(struct netifd_process *p, int ret)
314 {
315         struct proto_shell_state *state;
316
317         state = container_of(p, struct proto_shell_state, script_task);
318         proto_shell_task_finish(state, p);
319 }
320
321 static void
322 proto_shell_task_cb(struct netifd_process *p, int ret)
323 {
324         struct proto_shell_state *state;
325
326         state = container_of(p, struct proto_shell_state, proto_task);
327
328         if (state->sm == S_IDLE || state->sm == S_SETUP)
329                 state->last_error = WEXITSTATUS(ret);
330
331         proto_shell_task_finish(state, p);
332 }
333
334 static void
335 proto_shell_free(struct interface_proto_state *proto)
336 {
337         struct proto_shell_state *state;
338
339         state = container_of(proto, struct proto_shell_state, proto);
340         uloop_timeout_cancel(&state->teardown_timeout);
341         proto_shell_clear_host_dep(state);
342         netifd_kill_process(&state->script_task);
343         netifd_kill_process(&state->proto_task);
344         free(state->config);
345         free(state);
346 }
347
348 static void
349 proto_shell_parse_route_list(struct interface *iface, struct blob_attr *attr,
350                              bool v6)
351 {
352         struct blob_attr *cur;
353         int rem;
354
355         blobmsg_for_each_attr(cur, attr, rem) {
356                 if (blobmsg_type(cur) != BLOBMSG_TYPE_TABLE) {
357                         DPRINTF("Ignore wrong route type: %d\n", blobmsg_type(cur));
358                         continue;
359                 }
360
361                 interface_ip_add_route(iface, cur, v6);
362         }
363 }
364
365 static void
366 proto_shell_parse_data(struct interface *iface, struct blob_attr *attr)
367 {
368         struct blob_attr *cur;
369         int rem;
370
371         blobmsg_for_each_attr(cur, attr, rem)
372                 interface_add_data(iface, cur);
373 }
374
375 static struct device *
376 proto_shell_create_tunnel(const char *name, struct blob_attr *attr)
377 {
378         struct device *dev;
379         struct blob_buf b;
380
381         memset(&b, 0, sizeof(b));
382         blob_buf_init(&b, 0);
383         blob_put(&b, 0, blobmsg_data(attr), blobmsg_data_len(attr));
384         dev = device_create(name, &tunnel_device_type, blob_data(b.head));
385         blob_buf_free(&b);
386
387         return dev;
388 }
389
390 enum {
391         NOTIFY_ACTION,
392         NOTIFY_ERROR,
393         NOTIFY_COMMAND,
394         NOTIFY_ENV,
395         NOTIFY_SIGNAL,
396         NOTIFY_AVAILABLE,
397         NOTIFY_LINK_UP,
398         NOTIFY_IFNAME,
399         NOTIFY_ADDR_EXT,
400         NOTIFY_ROUTES,
401         NOTIFY_ROUTES6,
402         NOTIFY_TUNNEL,
403         NOTIFY_DATA,
404         NOTIFY_KEEP,
405         NOTIFY_HOST,
406         NOTIFY_DNS,
407         NOTIFY_DNS_SEARCH,
408         __NOTIFY_LAST
409 };
410
411 static const struct blobmsg_policy notify_attr[__NOTIFY_LAST] = {
412         [NOTIFY_ACTION] = { .name = "action", .type = BLOBMSG_TYPE_INT32 },
413         [NOTIFY_ERROR] = { .name = "error", .type = BLOBMSG_TYPE_ARRAY },
414         [NOTIFY_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_ARRAY },
415         [NOTIFY_ENV] = { .name = "env", .type = BLOBMSG_TYPE_ARRAY },
416         [NOTIFY_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
417         [NOTIFY_AVAILABLE] = { .name = "available", .type = BLOBMSG_TYPE_BOOL },
418         [NOTIFY_LINK_UP] = { .name = "link-up", .type = BLOBMSG_TYPE_BOOL },
419         [NOTIFY_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
420         [NOTIFY_ADDR_EXT] = { .name = "address-external", .type = BLOBMSG_TYPE_BOOL },
421         [NOTIFY_ROUTES] = { .name = "routes", .type = BLOBMSG_TYPE_ARRAY },
422         [NOTIFY_ROUTES6] = { .name = "routes6", .type = BLOBMSG_TYPE_ARRAY },
423         [NOTIFY_TUNNEL] = { .name = "tunnel", .type = BLOBMSG_TYPE_TABLE },
424         [NOTIFY_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
425         [NOTIFY_KEEP] = { .name = "keep", .type = BLOBMSG_TYPE_BOOL },
426         [NOTIFY_HOST] = { .name = "host", .type = BLOBMSG_TYPE_STRING },
427         [NOTIFY_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
428         [NOTIFY_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
429 };
430
431 static int
432 proto_shell_update_link(struct proto_shell_state *state, struct blob_attr *data, struct blob_attr **tb)
433 {
434         struct interface *iface = state->proto.iface;
435         struct blob_attr *cur;
436         struct device *dev;
437         const char *devname;
438         int dev_create = 1;
439         bool addr_ext = false;
440         bool keep = false;
441         bool up;
442
443         if (!tb[NOTIFY_LINK_UP])
444                 return UBUS_STATUS_INVALID_ARGUMENT;
445
446         up = blobmsg_get_bool(tb[NOTIFY_LINK_UP]);
447         if (!up) {
448                 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
449                 return 0;
450         }
451
452         if ((cur = tb[NOTIFY_KEEP]) != NULL)
453                 keep = blobmsg_get_bool(cur);
454
455         if ((cur = tb[NOTIFY_ADDR_EXT]) != NULL) {
456                 addr_ext = blobmsg_get_bool(cur);
457                 if (addr_ext)
458                         dev_create = 2;
459         }
460
461         if (iface->state != IFS_UP || !iface->l3_dev.dev)
462                 keep = false;
463
464         if (!keep) {
465                 dev = iface->main_dev.dev;
466                 if (tb[NOTIFY_IFNAME]) {
467                         keep = false;
468                         devname = blobmsg_data(tb[NOTIFY_IFNAME]);
469                         if (tb[NOTIFY_TUNNEL])
470                                 dev = proto_shell_create_tunnel(devname, tb[NOTIFY_TUNNEL]);
471                         else
472                                 dev = device_get(devname, dev_create);
473                 }
474
475                 if (!dev)
476                         return UBUS_STATUS_INVALID_ARGUMENT;
477
478                 interface_set_l3_dev(iface, dev);
479                 if (device_claim(&iface->l3_dev) < 0)
480                         return UBUS_STATUS_UNKNOWN_ERROR;
481
482                 device_set_present(dev, true);
483
484                 interface_update_start(iface);
485         }
486
487         proto_apply_ip_settings(iface, data, addr_ext);
488
489         if ((cur = tb[NOTIFY_ROUTES]) != NULL)
490                 proto_shell_parse_route_list(state->proto.iface, cur, false);
491
492         if ((cur = tb[NOTIFY_ROUTES6]) != NULL)
493                 proto_shell_parse_route_list(state->proto.iface, cur, true);
494
495         if ((cur = tb[NOTIFY_DNS]))
496                 interface_add_dns_server_list(&iface->proto_ip, cur);
497
498         if ((cur = tb[NOTIFY_DNS_SEARCH]))
499                 interface_add_dns_search_list(&iface->proto_ip, cur);
500
501         if ((cur = tb[NOTIFY_DATA]))
502                 proto_shell_parse_data(state->proto.iface, cur);
503
504         interface_update_complete(state->proto.iface);
505
506         if (!keep)
507                 state->proto.proto_event(&state->proto, IFPEV_UP);
508         state->sm = S_IDLE;
509
510         return 0;
511 }
512
513 static bool
514 fill_string_list(struct blob_attr *attr, char **argv, int max)
515 {
516         struct blob_attr *cur;
517         int argc = 0;
518         int rem;
519
520         if (!attr)
521                 goto out;
522
523         blobmsg_for_each_attr(cur, attr, rem) {
524                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
525                         return false;
526
527                 if (!blobmsg_check_attr(cur, NULL))
528                         return false;
529
530                 argv[argc++] = blobmsg_data(cur);
531                 if (argc == max - 1)
532                         return false;
533         }
534
535 out:
536         argv[argc] = NULL;
537         return true;
538 }
539
540 static int
541 proto_shell_run_command(struct proto_shell_state *state, struct blob_attr **tb)
542 {
543         static char *argv[64];
544         static char *env[32];
545
546         if (!tb[NOTIFY_COMMAND])
547                 goto error;
548
549         if (!fill_string_list(tb[NOTIFY_COMMAND], argv, ARRAY_SIZE(argv)))
550                 goto error;
551
552         if (!fill_string_list(tb[NOTIFY_ENV], env, ARRAY_SIZE(env)))
553                 goto error;
554
555         netifd_start_process((const char **) argv, (char **) env, &state->proto_task);
556
557         return 0;
558
559 error:
560         return UBUS_STATUS_INVALID_ARGUMENT;
561 }
562
563 static int
564 proto_shell_kill_command(struct proto_shell_state *state, struct blob_attr **tb)
565 {
566         unsigned int signal = ~0;
567
568         if (tb[NOTIFY_SIGNAL])
569                 signal = blobmsg_get_u32(tb[NOTIFY_SIGNAL]);
570
571         if (signal > 31)
572                 signal = SIGTERM;
573
574         if (state->proto_task.uloop.pending) {
575                 state->proto_task_killed = true;
576                 kill(state->proto_task.uloop.pid, signal);
577         }
578
579         return 0;
580 }
581
582 static int
583 proto_shell_notify_error(struct proto_shell_state *state, struct blob_attr **tb)
584 {
585         struct blob_attr *cur;
586         char *data[16];
587         int n_data = 0;
588         int rem;
589
590         if (!tb[NOTIFY_ERROR])
591                 return UBUS_STATUS_INVALID_ARGUMENT;
592
593         blobmsg_for_each_attr(cur, tb[NOTIFY_ERROR], rem) {
594                 if (n_data + 1 == ARRAY_SIZE(data))
595                         goto error;
596
597                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
598                         goto error;
599
600                 if (!blobmsg_check_attr(cur, NULL))
601                         goto error;
602
603                 data[n_data++] = blobmsg_data(cur);
604         }
605
606         if (!n_data)
607                 goto error;
608
609         interface_add_error(state->proto.iface, state->handler->proto.name,
610                         data[0], (const char **) &data[1], n_data - 1);
611
612         return 0;
613
614 error:
615         return UBUS_STATUS_INVALID_ARGUMENT;
616 }
617
618 static int
619 proto_shell_block_restart(struct proto_shell_state *state, struct blob_attr **tb)
620 {
621         state->proto.iface->autostart = false;
622         return 0;
623 }
624
625 static int
626 proto_shell_set_available(struct proto_shell_state *state, struct blob_attr **tb)
627 {
628         if (!tb[NOTIFY_AVAILABLE])
629                 return UBUS_STATUS_INVALID_ARGUMENT;
630
631         interface_set_available(state->proto.iface, blobmsg_get_bool(tb[NOTIFY_AVAILABLE]));
632         return 0;
633 }
634
635 static int
636 proto_shell_add_host_dependency(struct proto_shell_state *state, struct blob_attr **tb)
637 {
638         struct proto_shell_dependency *dep;
639         struct blob_attr *host = tb[NOTIFY_HOST];
640         struct blob_attr *ifname_a = tb[NOTIFY_IFNAME];
641         const char *ifname_str = ifname_a ? blobmsg_data(ifname_a) : "";
642         char *ifname;
643
644         if (!host)
645                 return UBUS_STATUS_INVALID_ARGUMENT;
646
647         dep = calloc_a(sizeof(*dep), &ifname, strlen(ifname_str) + 1);
648         if (inet_pton(AF_INET, blobmsg_data(host), &dep->host) < 1) {
649                 if (inet_pton(AF_INET6, blobmsg_data(host), &dep->host) < 1) {
650                         free(dep);
651                         return UBUS_STATUS_INVALID_ARGUMENT;
652                 } else {
653                         dep->v6 = true;
654                 }
655         }
656
657         dep->proto = state;
658         dep->interface = strcpy(ifname, ifname_str);
659
660         dep->dep.cb = proto_shell_if_up_cb;
661         interface_add_user(&dep->dep, NULL);
662         list_add(&dep->list, &state->deps);
663         proto_shell_update_host_dep(dep);
664         if (!dep->dep.iface)
665                 return UBUS_STATUS_NOT_FOUND;
666
667         return 0;
668 }
669
670 static int
671 proto_shell_setup_failed(struct proto_shell_state *state)
672 {
673         switch (state->sm) {
674         case S_IDLE:
675                 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
676                 /* fall through */
677         case S_SETUP:
678                 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
679                 break;
680         default:
681                 break;
682         }
683         return 0;
684 }
685
686 static int
687 proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
688 {
689         struct proto_shell_state *state;
690         struct blob_attr *tb[__NOTIFY_LAST];
691
692         state = container_of(proto, struct proto_shell_state, proto);
693
694         blobmsg_parse(notify_attr, __NOTIFY_LAST, tb, blob_data(attr), blob_len(attr));
695         if (!tb[NOTIFY_ACTION])
696                 return UBUS_STATUS_INVALID_ARGUMENT;
697
698         if (state->sm == S_TEARDOWN || state->sm == S_SETUP_ABORT)
699                 return UBUS_STATUS_PERMISSION_DENIED;
700
701         switch(blobmsg_get_u32(tb[NOTIFY_ACTION])) {
702         case 0:
703                 return proto_shell_update_link(state, attr, tb);
704         case 1:
705                 return proto_shell_run_command(state, tb);
706         case 2:
707                 return proto_shell_kill_command(state, tb);
708         case 3:
709                 return proto_shell_notify_error(state, tb);
710         case 4:
711                 return proto_shell_block_restart(state, tb);
712         case 5:
713                 return proto_shell_set_available(state, tb);
714         case 6:
715                 return proto_shell_add_host_dependency(state, tb);
716         case 7:
717                 return proto_shell_setup_failed(state);
718         default:
719                 return UBUS_STATUS_INVALID_ARGUMENT;
720         }
721 }
722
723 static struct interface_proto_state *
724 proto_shell_attach(const struct proto_handler *h, struct interface *iface,
725                    struct blob_attr *attr)
726 {
727         struct proto_shell_state *state;
728
729         state = calloc(1, sizeof(*state));
730         INIT_LIST_HEAD(&state->deps);
731
732         state->config = malloc(blob_pad_len(attr));
733         if (!state->config)
734                 goto error;
735
736         memcpy(state->config, attr, blob_pad_len(attr));
737         state->proto.free = proto_shell_free;
738         state->proto.notify = proto_shell_notify;
739         state->proto.cb = proto_shell_handler;
740         state->teardown_timeout.cb = proto_shell_teardown_timeout_cb;
741         state->script_task.cb = proto_shell_script_cb;
742         state->script_task.dir_fd = proto_fd;
743         state->script_task.log_prefix = iface->name;
744         state->proto_task.cb = proto_shell_task_cb;
745         state->proto_task.dir_fd = proto_fd;
746         state->proto_task.log_prefix = iface->name;
747         state->handler = container_of(h, struct proto_shell_handler, proto);
748
749         return &state->proto;
750
751 error:
752         free(state);
753         return NULL;
754 }
755
756 static void
757 proto_shell_add_handler(const char *script, const char *name, json_object *obj)
758 {
759         struct proto_shell_handler *handler;
760         struct proto_handler *proto;
761         json_object *config, *tmp;
762         char *proto_name, *script_name;
763
764         handler = calloc_a(sizeof(*handler),
765                            &proto_name, strlen(name) + 1,
766                            &script_name, strlen(script) + 1);
767         if (!handler)
768                 return;
769
770         handler->script_name = strcpy(script_name, script);
771
772         proto = &handler->proto;
773         proto->name = strcpy(proto_name, name);
774         proto->config_params = &handler->config;
775         proto->attach = proto_shell_attach;
776
777         tmp = json_get_field(obj, "no-device", json_type_boolean);
778         if (tmp && json_object_get_boolean(tmp))
779                 handler->proto.flags |= PROTO_FLAG_NODEV;
780
781         tmp = json_get_field(obj, "available", json_type_boolean);
782         if (tmp && json_object_get_boolean(tmp))
783                 handler->proto.flags |= PROTO_FLAG_INIT_AVAILABLE;
784
785         tmp = json_get_field(obj, "renew-handler", json_type_boolean);
786         if (tmp && json_object_get_boolean(tmp))
787                 handler->proto.flags |= PROTO_FLAG_RENEW_AVAILABLE;
788
789         config = json_get_field(obj, "config", json_type_array);
790         if (config)
791                 handler->config_buf = netifd_handler_parse_config(&handler->config, config);
792
793         DPRINTF("Add handler for script %s: %s\n", script, proto->name);
794         add_proto_handler(proto);
795 }
796
797 void proto_shell_init(void)
798 {
799         proto_fd = netifd_open_subdir("proto");
800         if (proto_fd < 0)
801                 return;
802
803         netifd_init_script_handlers(proto_fd, proto_shell_add_handler);
804 }