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