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