2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
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
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.
24 #include <arpa/inet.h>
25 #include <netinet/in.h>
27 #include <libubox/blobmsg_json.h>
30 #include "interface.h"
31 #include "interface-ip.h"
34 static struct netifd_fd proto_fd;
43 struct proto_shell_handler {
44 struct list_head list;
45 struct proto_handler proto;
46 struct config_param_list config;
52 struct proto_shell_dependency {
53 struct list_head list;
55 struct proto_shell_state *proto;
56 struct interface_user dep;
62 struct proto_shell_state {
63 struct interface_proto_state proto;
64 struct proto_shell_handler *handler;
65 struct blob_attr *config;
67 struct uloop_timeout teardown_timeout;
69 struct netifd_process script_task;
70 struct netifd_process proto_task;
72 enum proto_shell_sm sm;
73 bool proto_task_killed;
77 struct list_head deps;
81 proto_shell_check_dependencies(struct proto_shell_state *state)
83 struct proto_shell_dependency *dep;
84 bool available = true;
86 list_for_each_entry(dep, &state->deps, list) {
94 interface_set_available(state->proto.iface, available);
98 proto_shell_if_up_cb(struct interface_user *dep, struct interface *iface,
99 enum interface_event ev);
101 proto_shell_if_down_cb(struct interface_user *dep, struct interface *iface,
102 enum interface_event ev);
105 proto_shell_update_host_dep(struct proto_shell_dependency *dep)
107 struct interface *iface;
112 iface = interface_ip_add_target_route(&dep->host, dep->v6);
116 interface_remove_user(&dep->dep);
117 dep->dep.cb = proto_shell_if_down_cb;
118 interface_add_user(&dep->dep, iface);
121 proto_shell_check_dependencies(dep->proto);
125 proto_shell_clear_host_dep(struct proto_shell_state *state)
127 struct proto_shell_dependency *dep, *tmp;
129 list_for_each_entry_safe(dep, tmp, &state->deps, list) {
130 interface_remove_user(&dep->dep);
131 list_del(&dep->list);
137 proto_shell_handler(struct interface_proto_state *proto,
138 enum interface_proto_cmd cmd, bool force)
140 struct proto_shell_state *state;
141 struct proto_shell_handler *handler;
142 struct netifd_process *proc;
143 static char error_buf[32];
148 int ret, i = 0, j = 0;
150 state = container_of(proto, struct proto_shell_state, proto);
151 handler = state->handler;
152 proc = &state->script_task;
154 if (cmd == PROTO_CMD_SETUP) {
156 state->last_error = -1;
157 proto_shell_clear_host_dep(state);
159 if (state->sm == S_TEARDOWN)
162 if (state->script_task.uloop.pending) {
163 if (state->sm != S_SETUP_ABORT) {
164 uloop_timeout_set(&state->teardown_timeout, 1000);
165 kill(state->script_task.uloop.pid, SIGTERM);
166 if (state->proto_task.uloop.pending)
167 kill(state->proto_task.uloop.pid, SIGTERM);
168 state->sm = S_SETUP_ABORT;
174 state->sm = S_TEARDOWN;
175 if (state->last_error >= 0) {
176 snprintf(error_buf, sizeof(error_buf), "ERROR=%d", state->last_error);
177 envp[j++] = error_buf;
179 uloop_timeout_set(&state->teardown_timeout, 5000);
182 config = blobmsg_format_json(state->config, true);
186 argv[i++] = handler->script_name;
187 argv[i++] = handler->proto.name;
189 argv[i++] = proto->iface->name;
191 if (proto->iface->main_dev.dev)
192 argv[i++] = proto->iface->main_dev.dev->ifname;
196 ret = netifd_start_process(argv, envp, proc);
203 proto_shell_if_up_cb(struct interface_user *dep, struct interface *iface,
204 enum interface_event ev)
206 struct proto_shell_dependency *pdep;
211 pdep = container_of(dep, struct proto_shell_dependency, dep);
212 proto_shell_update_host_dep(pdep);
216 proto_shell_if_down_cb(struct interface_user *dep, struct interface *iface,
217 enum interface_event ev)
219 struct proto_shell_dependency *pdep;
220 struct proto_shell_state *state;
225 pdep = container_of(dep, struct proto_shell_dependency, dep);
226 interface_remove_user(dep);
227 dep->cb = proto_shell_if_up_cb;
228 interface_add_user(dep, NULL);
231 if (state->sm == S_IDLE) {
232 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
233 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
238 proto_shell_task_finish(struct proto_shell_state *state,
239 struct netifd_process *task)
243 if (task == &state->proto_task)
244 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
247 if (task == &state->proto_task)
248 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN,
253 if (state->script_task.uloop.pending ||
254 state->proto_task.uloop.pending)
257 uloop_timeout_cancel(&state->teardown_timeout);
259 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
263 if (state->script_task.uloop.pending)
266 if (state->proto_task.uloop.pending) {
267 if (!state->proto_task_killed)
268 kill(state->proto_task.uloop.pid, SIGTERM);
272 uloop_timeout_cancel(&state->teardown_timeout);
274 state->proto.proto_event(&state->proto, IFPEV_DOWN);
280 proto_shell_teardown_timeout_cb(struct uloop_timeout *timeout)
282 struct proto_shell_state *state;
284 state = container_of(timeout, struct proto_shell_state, teardown_timeout);
286 netifd_kill_process(&state->script_task);
287 netifd_kill_process(&state->proto_task);
288 proto_shell_task_finish(state, NULL);
292 proto_shell_script_cb(struct netifd_process *p, int ret)
294 struct proto_shell_state *state;
296 state = container_of(p, struct proto_shell_state, script_task);
297 proto_shell_task_finish(state, p);
301 proto_shell_task_cb(struct netifd_process *p, int ret)
303 struct proto_shell_state *state;
305 state = container_of(p, struct proto_shell_state, proto_task);
307 if (state->sm == S_IDLE || state->sm == S_SETUP)
308 state->last_error = WEXITSTATUS(ret);
310 proto_shell_task_finish(state, p);
314 proto_shell_free(struct interface_proto_state *proto)
316 struct proto_shell_state *state;
318 state = container_of(proto, struct proto_shell_state, proto);
319 proto_shell_clear_host_dep(state);
320 netifd_kill_process(&state->script_task);
321 netifd_kill_process(&state->proto_task);
327 proto_shell_parse_route_list(struct interface *iface, struct blob_attr *attr,
330 struct blob_attr *cur;
333 blobmsg_for_each_attr(cur, attr, rem) {
334 if (blobmsg_type(cur) != BLOBMSG_TYPE_TABLE) {
335 DPRINTF("Ignore wrong route type: %d\n", blobmsg_type(cur));
339 interface_ip_add_route(iface, cur, v6);
344 proto_shell_parse_data(struct interface *iface, struct blob_attr *attr)
346 struct blob_attr *cur;
349 blobmsg_for_each_attr(cur, attr, rem)
350 interface_add_data(iface, cur);
353 static struct device *
354 proto_shell_create_tunnel(const char *name, struct blob_attr *attr)
359 memset(&b, 0, sizeof(b));
360 blob_buf_init(&b, 0);
361 blob_put(&b, 0, blobmsg_data(attr), blobmsg_data_len(attr));
362 dev = device_create(name, &tunnel_device_type, blob_data(b.head));
387 static const struct blobmsg_policy notify_attr[__NOTIFY_LAST] = {
388 [NOTIFY_ACTION] = { .name = "action", .type = BLOBMSG_TYPE_INT32 },
389 [NOTIFY_ERROR] = { .name = "error", .type = BLOBMSG_TYPE_ARRAY },
390 [NOTIFY_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_ARRAY },
391 [NOTIFY_ENV] = { .name = "env", .type = BLOBMSG_TYPE_ARRAY },
392 [NOTIFY_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
393 [NOTIFY_AVAILABLE] = { .name = "available", .type = BLOBMSG_TYPE_BOOL },
394 [NOTIFY_LINK_UP] = { .name = "link-up", .type = BLOBMSG_TYPE_BOOL },
395 [NOTIFY_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
396 [NOTIFY_ADDR_EXT] = { .name = "address-external", .type = BLOBMSG_TYPE_BOOL },
397 [NOTIFY_ROUTES] = { .name = "routes", .type = BLOBMSG_TYPE_ARRAY },
398 [NOTIFY_ROUTES6] = { .name = "routes6", .type = BLOBMSG_TYPE_ARRAY },
399 [NOTIFY_TUNNEL] = { .name = "tunnel", .type = BLOBMSG_TYPE_TABLE },
400 [NOTIFY_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
401 [NOTIFY_KEEP] = { .name = "keep", .type = BLOBMSG_TYPE_BOOL },
402 [NOTIFY_HOST] = { .name = "host", .type = BLOBMSG_TYPE_STRING },
406 proto_shell_update_link(struct proto_shell_state *state, struct blob_attr *data, struct blob_attr **tb)
408 struct interface *iface = state->proto.iface;
409 struct blob_attr *cur;
413 bool addr_ext = false;
417 if (!tb[NOTIFY_LINK_UP])
418 return UBUS_STATUS_INVALID_ARGUMENT;
420 up = blobmsg_get_bool(tb[NOTIFY_LINK_UP]);
422 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
426 if ((cur = tb[NOTIFY_KEEP]) != NULL)
427 keep = blobmsg_get_bool(cur);
429 if ((cur = tb[NOTIFY_ADDR_EXT]) != NULL) {
430 addr_ext = blobmsg_get_bool(cur);
435 if (!tb[NOTIFY_IFNAME]) {
436 if (!iface->main_dev.dev)
437 return UBUS_STATUS_INVALID_ARGUMENT;
438 } else if (!keep || iface->state != IFS_UP) {
440 devname = blobmsg_data(tb[NOTIFY_IFNAME]);
441 if (tb[NOTIFY_TUNNEL]) {
442 dev = proto_shell_create_tunnel(devname,
445 return UBUS_STATUS_INVALID_ARGUMENT;
447 dev = device_get(devname, dev_create);
449 return UBUS_STATUS_NOT_FOUND;
452 interface_set_l3_dev(iface, dev);
453 device_claim(&iface->l3_dev);
457 interface_update_start(iface);
459 proto_apply_ip_settings(iface, data, addr_ext);
461 if ((cur = tb[NOTIFY_ROUTES]) != NULL)
462 proto_shell_parse_route_list(state->proto.iface, cur, false);
464 if ((cur = tb[NOTIFY_ROUTES6]) != NULL)
465 proto_shell_parse_route_list(state->proto.iface, cur, true);
467 interface_update_complete(state->proto.iface);
470 state->proto.proto_event(&state->proto, IFPEV_UP);
473 if ((cur = tb[NOTIFY_DATA]))
474 proto_shell_parse_data(state->proto.iface, cur);
480 fill_string_list(struct blob_attr *attr, char **argv, int max)
482 struct blob_attr *cur;
489 blobmsg_for_each_attr(cur, attr, rem) {
490 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
493 if (!blobmsg_check_attr(cur, NULL))
496 argv[argc++] = blobmsg_data(cur);
507 proto_shell_run_command(struct proto_shell_state *state, struct blob_attr **tb)
509 static char *argv[64];
510 static char *env[32];
512 if (!tb[NOTIFY_COMMAND])
515 if (!fill_string_list(tb[NOTIFY_COMMAND], argv, ARRAY_SIZE(argv)))
518 if (!fill_string_list(tb[NOTIFY_ENV], env, ARRAY_SIZE(env)))
521 netifd_start_process((const char **) argv, (char **) env, &state->proto_task);
526 return UBUS_STATUS_INVALID_ARGUMENT;
530 proto_shell_kill_command(struct proto_shell_state *state, struct blob_attr **tb)
532 unsigned int signal = ~0;
534 if (tb[NOTIFY_SIGNAL])
535 signal = blobmsg_get_u32(tb[NOTIFY_SIGNAL]);
540 if (state->proto_task.uloop.pending) {
541 state->proto_task_killed = true;
542 kill(state->proto_task.uloop.pid, signal);
549 proto_shell_notify_error(struct proto_shell_state *state, struct blob_attr **tb)
551 struct blob_attr *cur;
556 if (!tb[NOTIFY_ERROR])
557 return UBUS_STATUS_INVALID_ARGUMENT;
559 blobmsg_for_each_attr(cur, tb[NOTIFY_ERROR], rem) {
560 if (n_data + 1 == ARRAY_SIZE(data))
563 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
566 if (!blobmsg_check_attr(cur, NULL))
569 data[n_data++] = blobmsg_data(cur);
575 interface_add_error(state->proto.iface, state->handler->proto.name,
576 data[0], (const char **) &data[1], n_data - 1);
581 return UBUS_STATUS_INVALID_ARGUMENT;
585 proto_shell_block_restart(struct proto_shell_state *state, struct blob_attr **tb)
587 state->proto.iface->autostart = false;
592 proto_shell_set_available(struct proto_shell_state *state, struct blob_attr **tb)
594 if (!tb[NOTIFY_AVAILABLE])
595 return UBUS_STATUS_INVALID_ARGUMENT;
597 interface_set_available(state->proto.iface, blobmsg_get_bool(tb[NOTIFY_AVAILABLE]));
602 proto_shell_add_host_dependency(struct proto_shell_state *state, struct blob_attr **tb)
604 struct proto_shell_dependency *dep;
605 struct blob_attr *host = tb[NOTIFY_HOST];
608 return UBUS_STATUS_INVALID_ARGUMENT;
610 dep = calloc(1, sizeof(*dep));
611 if (!inet_pton(AF_INET, blobmsg_data(host), &dep->host)) {
613 return UBUS_STATUS_INVALID_ARGUMENT;
617 dep->dep.cb = proto_shell_if_up_cb;
618 interface_add_user(&dep->dep, NULL);
619 list_add(&dep->list, &state->deps);
620 proto_shell_update_host_dep(dep);
622 return UBUS_STATUS_NOT_FOUND;
628 proto_shell_setup_failed(struct proto_shell_state *state)
632 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
635 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
644 proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
646 struct proto_shell_state *state;
647 struct blob_attr *tb[__NOTIFY_LAST];
649 state = container_of(proto, struct proto_shell_state, proto);
651 blobmsg_parse(notify_attr, __NOTIFY_LAST, tb, blob_data(attr), blob_len(attr));
652 if (!tb[NOTIFY_ACTION])
653 return UBUS_STATUS_INVALID_ARGUMENT;
655 switch(blobmsg_get_u32(tb[NOTIFY_ACTION])) {
657 return proto_shell_update_link(state, attr, tb);
659 return proto_shell_run_command(state, tb);
661 return proto_shell_kill_command(state, tb);
663 return proto_shell_notify_error(state, tb);
665 return proto_shell_block_restart(state, tb);
667 return proto_shell_set_available(state, tb);
669 return proto_shell_add_host_dependency(state, tb);
671 return proto_shell_setup_failed(state);
673 return UBUS_STATUS_INVALID_ARGUMENT;
677 static struct interface_proto_state *
678 proto_shell_attach(const struct proto_handler *h, struct interface *iface,
679 struct blob_attr *attr)
681 struct proto_shell_state *state;
683 state = calloc(1, sizeof(*state));
684 INIT_LIST_HEAD(&state->deps);
686 state->config = malloc(blob_pad_len(attr));
690 memcpy(state->config, attr, blob_pad_len(attr));
691 state->proto.free = proto_shell_free;
692 state->proto.notify = proto_shell_notify;
693 state->proto.cb = proto_shell_handler;
694 state->teardown_timeout.cb = proto_shell_teardown_timeout_cb;
695 state->script_task.cb = proto_shell_script_cb;
696 state->script_task.dir_fd = proto_fd.fd;
697 state->script_task.log_prefix = iface->name;
698 state->proto_task.cb = proto_shell_task_cb;
699 state->proto_task.dir_fd = proto_fd.fd;
700 state->proto_task.log_prefix = iface->name;
701 state->handler = container_of(h, struct proto_shell_handler, proto);
703 return &state->proto;
711 check_type(json_object *obj, json_type type)
716 if (json_object_get_type(obj) != type)
722 static inline json_object *
723 get_field(json_object *obj, const char *name, json_type type)
725 return check_type(json_object_object_get(obj, name), type);
729 proto_shell_parse_config(struct config_param_list *config, json_object *obj)
731 struct blobmsg_policy *attrs;
732 char *str_buf, *str_cur;
736 config->n_params = json_object_array_length(obj);
737 attrs = calloc(1, sizeof(*attrs) * config->n_params);
741 config->params = attrs;
742 for (i = 0; i < config->n_params; i++) {
743 json_object *cur, *name, *type;
745 cur = check_type(json_object_array_get_idx(obj, i), json_type_array);
749 name = check_type(json_object_array_get_idx(cur, 0), json_type_string);
753 type = check_type(json_object_array_get_idx(cur, 1), json_type_int);
757 attrs[i].name = json_object_get_string(name);
758 attrs[i].type = json_object_get_int(type);
759 if (attrs[i].type > BLOBMSG_TYPE_LAST)
762 str_len += strlen(attrs[i].name) + 1;
765 str_buf = malloc(str_len);
770 for (i = 0; i < config->n_params; i++) {
771 const char *name = attrs[i].name;
773 attrs[i].name = str_cur;
774 str_cur += sprintf(str_cur, "%s", name) + 1;
781 config->n_params = 0;
786 proto_shell_add_handler(const char *script, json_object *obj)
788 struct proto_shell_handler *handler;
789 struct proto_handler *proto;
790 json_object *config, *tmp;
794 if (!check_type(obj, json_type_object))
797 tmp = get_field(obj, "name", json_type_string);
801 name = json_object_get_string(tmp);
803 handler = calloc(1, sizeof(*handler) +
809 strcpy(handler->script_name, script);
811 str = handler->script_name + strlen(handler->script_name) + 1;
814 proto = &handler->proto;
816 proto->config_params = &handler->config;
817 proto->attach = proto_shell_attach;
819 tmp = get_field(obj, "no-device", json_type_boolean);
820 if (tmp && json_object_get_boolean(tmp))
821 handler->proto.flags |= PROTO_FLAG_NODEV;
823 tmp = get_field(obj, "available", json_type_boolean);
824 if (tmp && json_object_get_boolean(tmp))
825 handler->proto.flags |= PROTO_FLAG_INIT_AVAILABLE;
827 config = get_field(obj, "config", json_type_array);
829 handler->config_buf = proto_shell_parse_config(&handler->config, config);
831 DPRINTF("Add handler for script %s: %s\n", script, proto->name);
832 add_proto_handler(proto);
835 static void proto_shell_add_script(const char *name)
837 struct json_tokener *tok = NULL;
839 static char buf[512];
844 #define DUMP_SUFFIX " '' dump"
846 cmd = alloca(strlen(name) + 1 + sizeof(DUMP_SUFFIX));
847 sprintf(cmd, "%s" DUMP_SUFFIX, name);
854 start = fgets(buf, sizeof(buf), f);
861 tok = json_tokener_new();
863 obj = json_tokener_parse_ex(tok, start, len);
864 if (!is_error(obj)) {
865 proto_shell_add_handler(name, obj);
866 json_object_put(obj);
867 json_tokener_free(tok);
869 } else if (start[len - 1] == '\n') {
870 json_tokener_free(tok);
873 } while (!feof(f) && !ferror(f));
876 json_tokener_free(tok);
881 static void __init proto_shell_init(void)
887 main_fd = open(".", O_RDONLY | O_DIRECTORY);
891 if (chdir(main_path)) {
892 perror("chdir(main path)");
896 if (chdir("./proto"))
899 proto_fd.fd = open(".", O_RDONLY | O_DIRECTORY);
903 netifd_fd_add(&proto_fd);
904 glob("./*.sh", 0, NULL, &g);
905 for (i = 0; i < g.gl_pathc; i++)
906 proto_shell_add_script(g.gl_pathv[i]);