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