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                 switch (state->sm) {
 160                 case S_IDLE:
 161                         action = "setup";
 162                         state->last_error = -1;
 163                         proto_shell_clear_host_dep(state);
 164                         state->sm = S_SETUP;
 165                         break;
 166
 167                 case S_SETUP_ABORT:
 168                 case S_TEARDOWN:
 169                 case S_SETUP:
 170                         return 0;
 171
 172                 default:
 173                         return -1;
 174                 }
 175         } else if (cmd == PROTO_CMD_RENEW) {
 176                 if (!(handler->proto.flags & PROTO_FLAG_RENEW_AVAILABLE))
 177                         return 0;
 178
 179                 if (state->script_task.uloop.pending) {
 180                         state->renew_pending = true;
 181                         return 0;
 182                 }
 183
 184                 state->renew_pending = false;
 185                 action = "renew";
 186         } else {
 187                 if (state->sm == S_TEARDOWN)
 188                         return 0;
 189
 190                 state->renew_pending = false;
 191                 if (state->script_task.uloop.pending) {
 192                         if (state->sm != S_SETUP_ABORT) {
 193                                 uloop_timeout_set(&state->teardown_timeout, 1000);
 194                                 kill(state->script_task.uloop.pid, SIGTERM);
 195                                 if (state->proto_task.uloop.pending)
 196                                         kill(state->proto_task.uloop.pid, SIGTERM);
 197                                 state->sm = S_SETUP_ABORT;
 198                         }
 199                         return 0;
 200                 }
 201
 202                 action = "teardown";
 203                 state->sm = S_TEARDOWN;
 204                 if (state->last_error >= 0) {
 205                         snprintf(error_buf, sizeof(error_buf), "ERROR=%d", state->last_error);
 206                         envp[j++] = error_buf;
 207                 }
 208                 uloop_timeout_set(&state->teardown_timeout, 5000);
 209         }
 210
 211         D(INTERFACE, "run %s for interface '%s'\n", action, proto->iface->name);
 212         config = blobmsg_format_json(state->config, true);
 213         if (!config)
 214                 return -1;
 215
 216         argv[i++] = handler->script_name;
 217         argv[i++] = handler->proto.name;
 218         argv[i++] = action;
 219         argv[i++] = proto->iface->name;
 220         argv[i++] = config;
 221         if (proto->iface->main_dev.dev)
 222                 argv[i++] = proto->iface->main_dev.dev->ifname;
 223         argv[i] = NULL;
 224         envp[j] = NULL;
 225
 226         ret = netifd_start_process(argv, envp, proc);
 227         free(config);
 228
 229         return ret;
 230 }
 231
 232 static void
 233 proto_shell_if_up_cb(struct interface_user *dep, struct interface *iface,
 234                      enum interface_event ev)
 235 {
 236         struct proto_shell_dependency *pdep;
 237
 238         if (ev != IFEV_UP && ev != IFEV_UPDATE)
 239                 return;
 240
 241         pdep = container_of(dep, struct proto_shell_dependency, dep);
 242         proto_shell_update_host_dep(pdep);
 243 }
 244
 245 static void
 246 proto_shell_if_down_cb(struct interface_user *dep, struct interface *iface,
 247                        enum interface_event ev)
 248 {
 249         struct proto_shell_dependency *pdep;
 250         struct proto_shell_state *state;
 251
 252         if (ev == IFEV_UP || ev == IFEV_UPDATE)
 253                 return;
 254
 255         pdep = container_of(dep, struct proto_shell_dependency, dep);
 256         interface_remove_user(dep);
 257         dep->cb = proto_shell_if_up_cb;
 258         interface_add_user(dep, NULL);
 259
 260         state = pdep->proto;
 261         if (state->sm == S_IDLE) {
 262                 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
 263                 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
 264         }
 265 }
 266
 267 static void
 268 proto_shell_task_finish(struct proto_shell_state *state,
 269                         struct netifd_process *task)
 270 {
 271         switch (state->sm) {
 272         case S_IDLE:
 273                 if (task == &state->proto_task)
 274                         state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
 275                 /* fall through */
 276         case S_SETUP:
 277                 if (task == &state->proto_task)
 278                         proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN,
 279                                             false);
 280                 if (task == &state->script_task && state->renew_pending)
 281                         proto_shell_handler(&state->proto, PROTO_CMD_RENEW,
 282                                             false);
 283                 break;
 284
 285         case S_SETUP_ABORT:
 286                 if (state->script_task.uloop.pending ||
 287                     state->proto_task.uloop.pending)
 288                         break;
 289
 290                 uloop_timeout_cancel(&state->teardown_timeout);
 291                 state->sm = S_IDLE;
 292                 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
 293                 break;
 294
 295         case S_TEARDOWN:
 296                 if (state->script_task.uloop.pending)
 297                         break;
 298
 299                 if (state->proto_task.uloop.pending) {
 300                         if (!state->proto_task_killed)
 301                                 kill(state->proto_task.uloop.pid, SIGTERM);
 302                         break;
 303                 }
 304
 305                 uloop_timeout_cancel(&state->teardown_timeout);
 306                 state->sm = S_IDLE;
 307                 state->proto.proto_event(&state->proto, IFPEV_DOWN);
 308                 break;
 309         }
 310 }
 311
 312 static void
 313 proto_shell_teardown_timeout_cb(struct uloop_timeout *timeout)
 314 {
 315         struct proto_shell_state *state;
 316
 317         state = container_of(timeout, struct proto_shell_state, teardown_timeout);
 318
 319         netifd_kill_process(&state->script_task);
 320         netifd_kill_process(&state->proto_task);
 321         proto_shell_task_finish(state, NULL);
 322 }
 323
 324 static void
 325 proto_shell_script_cb(struct netifd_process *p, int ret)
 326 {
 327         struct proto_shell_state *state;
 328
 329         state = container_of(p, struct proto_shell_state, script_task);
 330         proto_shell_task_finish(state, p);
 331 }
 332
 333 static void
 334 proto_shell_task_cb(struct netifd_process *p, int ret)
 335 {
 336         struct proto_shell_state *state;
 337
 338         state = container_of(p, struct proto_shell_state, proto_task);
 339
 340         if (state->sm == S_IDLE || state->sm == S_SETUP)
 341                 state->last_error = WEXITSTATUS(ret);
 342
 343         proto_shell_task_finish(state, p);
 344 }
 345
 346 static void
 347 proto_shell_free(struct interface_proto_state *proto)
 348 {
 349         struct proto_shell_state *state;
 350
 351         state = container_of(proto, struct proto_shell_state, proto);
 352         uloop_timeout_cancel(&state->teardown_timeout);
 353         proto_shell_clear_host_dep(state);
 354         netifd_kill_process(&state->script_task);
 355         netifd_kill_process(&state->proto_task);
 356         free(state->config);
 357         free(state);
 358 }
 359
 360 static void
 361 proto_shell_parse_route_list(struct interface *iface, struct blob_attr *attr,
 362                              bool v6)
 363 {
 364         struct blob_attr *cur;
 365         int rem;
 366
 367         blobmsg_for_each_attr(cur, attr, rem) {
 368                 if (blobmsg_type(cur) != BLOBMSG_TYPE_TABLE) {
 369                         DPRINTF("Ignore wrong route type: %d\n", blobmsg_type(cur));
 370                         continue;
 371                 }
 372
 373                 interface_ip_add_route(iface, cur, v6);
 374         }
 375 }
 376
 377 static void
 378 proto_shell_parse_data(struct interface *iface, struct blob_attr *attr)
 379 {
 380         struct blob_attr *cur;
 381         int rem;
 382
 383         blobmsg_for_each_attr(cur, attr, rem)
 384                 interface_add_data(iface, cur);
 385 }
 386
 387 static struct device *
 388 proto_shell_create_tunnel(const char *name, struct blob_attr *attr)
 389 {
 390         struct device *dev;
 391         struct blob_buf b;
 392
 393         memset(&b, 0, sizeof(b));
 394         blob_buf_init(&b, 0);
 395         blob_put(&b, 0, blobmsg_data(attr), blobmsg_data_len(attr));
 396         dev = device_create(name, &tunnel_device_type, blob_data(b.head));
 397         blob_buf_free(&b);
 398
 399         return dev;
 400 }
 401
 402 enum {
 403         NOTIFY_ACTION,
 404         NOTIFY_ERROR,
 405         NOTIFY_COMMAND,
 406         NOTIFY_ENV,
 407         NOTIFY_SIGNAL,
 408         NOTIFY_AVAILABLE,
 409         NOTIFY_LINK_UP,
 410         NOTIFY_IFNAME,
 411         NOTIFY_ADDR_EXT,
 412         NOTIFY_ROUTES,
 413         NOTIFY_ROUTES6,
 414         NOTIFY_TUNNEL,
 415         NOTIFY_DATA,
 416         NOTIFY_KEEP,
 417         NOTIFY_HOST,
 418         NOTIFY_DNS,
 419         NOTIFY_DNS_SEARCH,
 420         __NOTIFY_LAST
 421 };
 422
 423 static const struct blobmsg_policy notify_attr[__NOTIFY_LAST] = {
 424         [NOTIFY_ACTION] = { .name = "action", .type = BLOBMSG_TYPE_INT32 },
 425         [NOTIFY_ERROR] = { .name = "error", .type = BLOBMSG_TYPE_ARRAY },
 426         [NOTIFY_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_ARRAY },
 427         [NOTIFY_ENV] = { .name = "env", .type = BLOBMSG_TYPE_ARRAY },
 428         [NOTIFY_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
 429         [NOTIFY_AVAILABLE] = { .name = "available", .type = BLOBMSG_TYPE_BOOL },
 430         [NOTIFY_LINK_UP] = { .name = "link-up", .type = BLOBMSG_TYPE_BOOL },
 431         [NOTIFY_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
 432         [NOTIFY_ADDR_EXT] = { .name = "address-external", .type = BLOBMSG_TYPE_BOOL },
 433         [NOTIFY_ROUTES] = { .name = "routes", .type = BLOBMSG_TYPE_ARRAY },
 434         [NOTIFY_ROUTES6] = { .name = "routes6", .type = BLOBMSG_TYPE_ARRAY },
 435         [NOTIFY_TUNNEL] = { .name = "tunnel", .type = BLOBMSG_TYPE_TABLE },
 436         [NOTIFY_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 437         [NOTIFY_KEEP] = { .name = "keep", .type = BLOBMSG_TYPE_BOOL },
 438         [NOTIFY_HOST] = { .name = "host", .type = BLOBMSG_TYPE_STRING },
 439         [NOTIFY_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
 440         [NOTIFY_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
 441 };
 442
 443 static int
 444 proto_shell_update_link(struct proto_shell_state *state, struct blob_attr *data, struct blob_attr **tb)
 445 {
 446         struct interface *iface = state->proto.iface;
 447         struct blob_attr *cur;
 448         struct device *dev;
 449         const char *devname;
 450         int dev_create = 1;
 451         bool addr_ext = false;
 452         bool keep = false;
 453         bool up;
 454
 455         if (state->sm == S_TEARDOWN || state->sm == S_SETUP_ABORT)
 456                 return UBUS_STATUS_PERMISSION_DENIED;
 457
 458         if (!tb[NOTIFY_LINK_UP])
 459                 return UBUS_STATUS_INVALID_ARGUMENT;
 460
 461         up = blobmsg_get_bool(tb[NOTIFY_LINK_UP]);
 462         if (!up) {
 463                 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
 464                 return 0;
 465         }
 466
 467         if ((cur = tb[NOTIFY_KEEP]) != NULL)
 468                 keep = blobmsg_get_bool(cur);
 469
 470         if ((cur = tb[NOTIFY_ADDR_EXT]) != NULL) {
 471                 addr_ext = blobmsg_get_bool(cur);
 472                 if (addr_ext)
 473                         dev_create = 2;
 474         }
 475
 476         if (iface->state != IFS_UP || !iface->l3_dev.dev)
 477                 keep = false;
 478
 479         if (!keep) {
 480                 dev = iface->main_dev.dev;
 481                 if (tb[NOTIFY_IFNAME]) {
 482                         keep = false;
 483                         devname = blobmsg_data(tb[NOTIFY_IFNAME]);
 484                         if (tb[NOTIFY_TUNNEL])
 485                                 dev = proto_shell_create_tunnel(devname, tb[NOTIFY_TUNNEL]);
 486                         else
 487                                 dev = device_get(devname, dev_create);
 488                 }
 489
 490                 if (!dev)
 491                         return UBUS_STATUS_INVALID_ARGUMENT;
 492
 493                 interface_set_l3_dev(iface, dev);
 494                 if (device_claim(&iface->l3_dev) < 0)
 495                         return UBUS_STATUS_UNKNOWN_ERROR;
 496
 497                 device_set_present(dev, true);
 498
 499                 interface_update_start(iface);
 500         }
 501
 502         proto_apply_ip_settings(iface, data, addr_ext);
 503
 504         if ((cur = tb[NOTIFY_ROUTES]) != NULL)
 505                 proto_shell_parse_route_list(state->proto.iface, cur, false);
 506
 507         if ((cur = tb[NOTIFY_ROUTES6]) != NULL)
 508                 proto_shell_parse_route_list(state->proto.iface, cur, true);
 509
 510         if ((cur = tb[NOTIFY_DNS]))
 511                 interface_add_dns_server_list(&iface->proto_ip, cur);
 512
 513         if ((cur = tb[NOTIFY_DNS_SEARCH]))
 514                 interface_add_dns_search_list(&iface->proto_ip, cur);
 515
 516         if ((cur = tb[NOTIFY_DATA]))
 517                 proto_shell_parse_data(state->proto.iface, cur);
 518
 519         interface_update_complete(state->proto.iface);
 520
 521         if ((state->sm != S_SETUP_ABORT) && (state->sm != S_TEARDOWN)) {
 522                 if (!keep)
 523                         state->proto.proto_event(&state->proto, IFPEV_UP);
 524                 state->sm = S_IDLE;
 525         }
 526
 527         return 0;
 528 }
 529
 530 static bool
 531 fill_string_list(struct blob_attr *attr, char **argv, int max)
 532 {
 533         struct blob_attr *cur;
 534         int argc = 0;
 535         int rem;
 536
 537         if (!attr)
 538                 goto out;
 539
 540         blobmsg_for_each_attr(cur, attr, rem) {
 541                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 542                         return false;
 543
 544                 if (!blobmsg_check_attr(cur, NULL))
 545                         return false;
 546
 547                 argv[argc++] = blobmsg_data(cur);
 548                 if (argc == max - 1)
 549                         return false;
 550         }
 551
 552 out:
 553         argv[argc] = NULL;
 554         return true;
 555 }
 556
 557 static int
 558 proto_shell_run_command(struct proto_shell_state *state, struct blob_attr **tb)
 559 {
 560         static char *argv[64];
 561         static char *env[32];
 562
 563         if (state->sm == S_TEARDOWN || state->sm == S_SETUP_ABORT)
 564                 return UBUS_STATUS_PERMISSION_DENIED;
 565
 566         if (!tb[NOTIFY_COMMAND])
 567                 goto error;
 568
 569         if (!fill_string_list(tb[NOTIFY_COMMAND], argv, ARRAY_SIZE(argv)))
 570                 goto error;
 571
 572         if (!fill_string_list(tb[NOTIFY_ENV], env, ARRAY_SIZE(env)))
 573                 goto error;
 574
 575         netifd_start_process((const char **) argv, (char **) env, &state->proto_task);
 576
 577         return 0;
 578
 579 error:
 580         return UBUS_STATUS_INVALID_ARGUMENT;
 581 }
 582
 583 static int
 584 proto_shell_kill_command(struct proto_shell_state *state, struct blob_attr **tb)
 585 {
 586         unsigned int signal = ~0;
 587
 588         if (tb[NOTIFY_SIGNAL])
 589                 signal = blobmsg_get_u32(tb[NOTIFY_SIGNAL]);
 590
 591         if (signal > 31)
 592                 signal = SIGTERM;
 593
 594         if (state->proto_task.uloop.pending) {
 595                 if (signal == SIGTERM || signal == SIGKILL)
 596                         state->proto_task_killed = true;
 597                 kill(state->proto_task.uloop.pid, signal);
 598         }
 599
 600         return 0;
 601 }
 602
 603 static int
 604 proto_shell_notify_error(struct proto_shell_state *state, struct blob_attr **tb)
 605 {
 606         struct blob_attr *cur;
 607         char *data[16];
 608         int n_data = 0;
 609         int rem;
 610
 611         if (!tb[NOTIFY_ERROR])
 612                 return UBUS_STATUS_INVALID_ARGUMENT;
 613
 614         blobmsg_for_each_attr(cur, tb[NOTIFY_ERROR], rem) {
 615                 if (n_data + 1 == ARRAY_SIZE(data))
 616                         goto error;
 617
 618                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 619                         goto error;
 620
 621                 if (!blobmsg_check_attr(cur, NULL))
 622                         goto error;
 623
 624                 data[n_data++] = blobmsg_data(cur);
 625         }
 626
 627         if (!n_data)
 628                 goto error;
 629
 630         interface_add_error(state->proto.iface, state->handler->proto.name,
 631                         data[0], (const char **) &data[1], n_data - 1);
 632
 633         return 0;
 634
 635 error:
 636         return UBUS_STATUS_INVALID_ARGUMENT;
 637 }
 638
 639 static int
 640 proto_shell_block_restart(struct proto_shell_state *state, struct blob_attr **tb)
 641 {
 642         state->proto.iface->autostart = false;
 643         return 0;
 644 }
 645
 646 static int
 647 proto_shell_set_available(struct proto_shell_state *state, struct blob_attr **tb)
 648 {
 649         if (!tb[NOTIFY_AVAILABLE])
 650                 return UBUS_STATUS_INVALID_ARGUMENT;
 651
 652         interface_set_available(state->proto.iface, blobmsg_get_bool(tb[NOTIFY_AVAILABLE]));
 653         return 0;
 654 }
 655
 656 static int
 657 proto_shell_add_host_dependency(struct proto_shell_state *state, struct blob_attr **tb)
 658 {
 659         struct proto_shell_dependency *dep;
 660         struct blob_attr *host = tb[NOTIFY_HOST];
 661         struct blob_attr *ifname_a = tb[NOTIFY_IFNAME];
 662         const char *ifname_str = ifname_a ? blobmsg_data(ifname_a) : "";
 663         char *ifname;
 664
 665         if (state->sm == S_TEARDOWN || state->sm == S_SETUP_ABORT)
 666                 return UBUS_STATUS_PERMISSION_DENIED;
 667
 668         if (!host)
 669                 return UBUS_STATUS_INVALID_ARGUMENT;
 670
 671         dep = calloc_a(sizeof(*dep), &ifname, strlen(ifname_str) + 1);
 672         if (inet_pton(AF_INET, blobmsg_data(host), &dep->host) < 1) {
 673                 if (inet_pton(AF_INET6, blobmsg_data(host), &dep->host) < 1) {
 674                         free(dep);
 675                         return UBUS_STATUS_INVALID_ARGUMENT;
 676                 } else {
 677                         dep->v6 = true;
 678                 }
 679         }
 680
 681         dep->proto = state;
 682         dep->interface = strcpy(ifname, ifname_str);
 683
 684         dep->dep.cb = proto_shell_if_up_cb;
 685         interface_add_user(&dep->dep, NULL);
 686         list_add(&dep->list, &state->deps);
 687         proto_shell_update_host_dep(dep);
 688         if (!dep->dep.iface)
 689                 return UBUS_STATUS_NOT_FOUND;
 690
 691         return 0;
 692 }
 693
 694 static int
 695 proto_shell_setup_failed(struct proto_shell_state *state)
 696 {
 697         int ret = 0;
 698
 699         switch (state->sm) {
 700         case S_IDLE:
 701                 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
 702                 /* fall through */
 703         case S_SETUP:
 704                 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
 705                 break;
 706         case S_SETUP_ABORT:
 707         case S_TEARDOWN:
 708         default:
 709                 ret = UBUS_STATUS_PERMISSION_DENIED;
 710                 break;
 711         }
 712         return ret;
 713 }
 714
 715 static int
 716 proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
 717 {
 718         struct proto_shell_state *state;
 719         struct blob_attr *tb[__NOTIFY_LAST];
 720
 721         state = container_of(proto, struct proto_shell_state, proto);
 722
 723         blobmsg_parse(notify_attr, __NOTIFY_LAST, tb, blob_data(attr), blob_len(attr));
 724         if (!tb[NOTIFY_ACTION])
 725                 return UBUS_STATUS_INVALID_ARGUMENT;
 726
 727         switch(blobmsg_get_u32(tb[NOTIFY_ACTION])) {
 728         case 0:
 729                 return proto_shell_update_link(state, attr, tb);
 730         case 1:
 731                 return proto_shell_run_command(state, tb);
 732         case 2:
 733                 return proto_shell_kill_command(state, tb);
 734         case 3:
 735                 return proto_shell_notify_error(state, tb);
 736         case 4:
 737                 return proto_shell_block_restart(state, tb);
 738         case 5:
 739                 return proto_shell_set_available(state, tb);
 740         case 6:
 741                 return proto_shell_add_host_dependency(state, tb);
 742         case 7:
 743                 return proto_shell_setup_failed(state);
 744         default:
 745                 return UBUS_STATUS_INVALID_ARGUMENT;
 746         }
 747 }
 748
 749 static struct interface_proto_state *
 750 proto_shell_attach(const struct proto_handler *h, struct interface *iface,
 751                    struct blob_attr *attr)
 752 {
 753         struct proto_shell_state *state;
 754
 755         state = calloc(1, sizeof(*state));
 756         INIT_LIST_HEAD(&state->deps);
 757
 758         state->config = malloc(blob_pad_len(attr));
 759         if (!state->config)
 760                 goto error;
 761
 762         memcpy(state->config, attr, blob_pad_len(attr));
 763         state->proto.free = proto_shell_free;
 764         state->proto.notify = proto_shell_notify;
 765         state->proto.cb = proto_shell_handler;
 766         state->teardown_timeout.cb = proto_shell_teardown_timeout_cb;
 767         state->script_task.cb = proto_shell_script_cb;
 768         state->script_task.dir_fd = proto_fd;
 769         state->script_task.log_prefix = iface->name;
 770         state->proto_task.cb = proto_shell_task_cb;
 771         state->proto_task.dir_fd = proto_fd;
 772         state->proto_task.log_prefix = iface->name;
 773         state->handler = container_of(h, struct proto_shell_handler, proto);
 774
 775         return &state->proto;
 776
 777 error:
 778         free(state);
 779         return NULL;
 780 }
 781
 782 static void
 783 proto_shell_add_handler(const char *script, const char *name, json_object *obj)
 784 {
 785         struct proto_shell_handler *handler;
 786         struct proto_handler *proto;
 787         json_object *config, *tmp;
 788         char *proto_name, *script_name;
 789
 790         handler = calloc_a(sizeof(*handler),
 791                            &proto_name, strlen(name) + 1,
 792                            &script_name, strlen(script) + 1);
 793         if (!handler)
 794                 return;
 795
 796         handler->script_name = strcpy(script_name, script);
 797
 798         proto = &handler->proto;
 799         proto->name = strcpy(proto_name, name);
 800         proto->config_params = &handler->config;
 801         proto->attach = proto_shell_attach;
 802
 803         tmp = json_get_field(obj, "no-device", json_type_boolean);
 804         if (tmp && json_object_get_boolean(tmp))
 805                 handler->proto.flags |= PROTO_FLAG_NODEV;
 806
 807         tmp = json_get_field(obj, "available", json_type_boolean);
 808         if (tmp && json_object_get_boolean(tmp))
 809                 handler->proto.flags |= PROTO_FLAG_INIT_AVAILABLE;
 810
 811         tmp = json_get_field(obj, "renew-handler", json_type_boolean);
 812         if (tmp && json_object_get_boolean(tmp))
 813                 handler->proto.flags |= PROTO_FLAG_RENEW_AVAILABLE;
 814
 815         config = json_get_field(obj, "config", json_type_array);
 816         if (config)
 817                 handler->config_buf = netifd_handler_parse_config(&handler->config, config);
 818
 819         DPRINTF("Add handler for script %s: %s\n", script, proto->name);
 820         add_proto_handler(proto);
 821 }
 822
 823 void proto_shell_init(void)
 824 {
 825         proto_fd = netifd_open_subdir("proto");
 826         if (proto_fd < 0)
 827                 return;
 828
 829         netifd_init_script_handlers(proto_fd, proto_shell_add_handler);
 830 }