proto.c

   1 /*
   2  * netifd - network interface daemon
   3  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   4  * Copyright (C) 2012 Steven Barth <steven@midlink.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2
   8  * as published by the Free Software Foundation
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15 #include <string.h>
  16 #include <stdlib.h>
  17 #include <stdio.h>
  18 #include <limits.h>
  19
  20 #include <arpa/inet.h>
  21 #include <netinet/in.h>
  22
  23 #include "netifd.h"
  24 #include "system.h"
  25 #include "interface.h"
  26 #include "interface-ip.h"
  27 #include "proto.h"
  28
  29 static struct avl_tree handlers;
  30
  31 enum {
  32         OPT_IPADDR,
  33         OPT_IP6ADDR,
  34         OPT_NETMASK,
  35         OPT_BROADCAST,
  36         OPT_GATEWAY,
  37         OPT_IP6GW,
  38         OPT_IP6PREFIX,
  39         OPT_IP6DEPRECATED,
  40         __OPT_MAX,
  41 };
  42
  43 static const struct blobmsg_policy proto_ip_attributes[__OPT_MAX] = {
  44         [OPT_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_ARRAY },
  45         [OPT_IP6ADDR] = { .name = "ip6addr", .type = BLOBMSG_TYPE_ARRAY },
  46         [OPT_NETMASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING },
  47         [OPT_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
  48         [OPT_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
  49         [OPT_IP6GW] = { .name = "ip6gw", .type = BLOBMSG_TYPE_STRING },
  50         [OPT_IP6PREFIX] = { .name = "ip6prefix", .type = BLOBMSG_TYPE_ARRAY },
  51         [OPT_IP6DEPRECATED] = { .name = "ip6deprecated", .type = BLOBMSG_TYPE_BOOL },
  52 };
  53
  54 static const struct uci_blob_param_info proto_ip_attr_info[__OPT_MAX] = {
  55         [OPT_IPADDR] = { .type = BLOBMSG_TYPE_STRING },
  56         [OPT_IP6ADDR] = { .type = BLOBMSG_TYPE_STRING },
  57         [OPT_IP6PREFIX] = { .type = BLOBMSG_TYPE_STRING },
  58 };
  59
  60 static const char * const proto_ip_validate[__OPT_MAX] = {
  61         [OPT_IPADDR] = "ip4addr",
  62         [OPT_IP6ADDR] = "ip6addr",
  63         [OPT_NETMASK] = "netmask",
  64         [OPT_BROADCAST] = "ipaddr",
  65         [OPT_GATEWAY] = "ip4addr",
  66         [OPT_IP6GW] = "ip6addr",
  67         [OPT_IP6PREFIX] = "ip6addr",
  68 };
  69
  70 const struct uci_blob_param_list proto_ip_attr = {
  71         .n_params = __OPT_MAX,
  72         .params = proto_ip_attributes,
  73         .validate = proto_ip_validate,
  74         .info = proto_ip_attr_info,
  75 };
  76
  77 enum {
  78         ADDR_IPADDR,
  79         ADDR_MASK,
  80         ADDR_BROADCAST,
  81         ADDR_PTP,
  82         ADDR_PREFERRED,
  83         ADDR_VALID,
  84         ADDR_OFFLINK,
  85         ADDR_CLASS,
  86         __ADDR_MAX
  87 };
  88
  89 static const struct blobmsg_policy proto_ip_addr[__ADDR_MAX] = {
  90         [ADDR_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_STRING },
  91         [ADDR_MASK] = { .name = "mask", .type = BLOBMSG_TYPE_STRING },
  92         [ADDR_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
  93         [ADDR_PTP] = { .name = "ptp", .type = BLOBMSG_TYPE_STRING },
  94         [ADDR_PREFERRED] = { .name = "preferred", .type = BLOBMSG_TYPE_INT32 },
  95         [ADDR_VALID] = { .name = "valid", .type = BLOBMSG_TYPE_INT32 },
  96         [ADDR_OFFLINK] = { .name = "offlink", .type = BLOBMSG_TYPE_BOOL },
  97         [ADDR_CLASS] = { .name = "class", .type = BLOBMSG_TYPE_STRING },
  98 };
  99
 100 static struct device_addr *
 101 alloc_device_addr(bool v6, bool ext)
 102 {
 103         struct device_addr *addr;
 104
 105         addr = calloc(1, sizeof(*addr));
 106         if (!addr)
 107                 return NULL;
 108
 109         addr->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
 110         if (ext)
 111                 addr->flags |= DEVADDR_EXTERNAL;
 112
 113         return addr;
 114 }
 115
 116 static bool
 117 parse_addr(struct interface *iface, const char *str, bool v6, int mask,
 118            bool ext, uint32_t broadcast, bool deprecated)
 119 {
 120         struct device_addr *addr;
 121         int af = v6 ? AF_INET6 : AF_INET;
 122
 123         addr = alloc_device_addr(v6, ext);
 124         if (!addr)
 125                 return false;
 126
 127         addr->mask = mask;
 128         if (!parse_ip_and_netmask(af, str, &addr->addr, &addr->mask))
 129                 goto error;
 130
 131         if (!v6) {
 132                 if (IN_EXPERIMENTAL(ntohl(addr->addr.in.s_addr)))
 133                         goto error;
 134
 135         } else if (IN6_IS_ADDR_MULTICAST(&addr->addr.in6))
 136                 goto error;
 137
 138         if (broadcast)
 139                 addr->broadcast = broadcast;
 140
 141         if (deprecated)
 142                 addr->preferred_until = system_get_rtime();
 143
 144         vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
 145         return true;
 146
 147 error:
 148         interface_add_error(iface, "proto", "INVALID_ADDRESS", &str, 1);
 149         free(addr);
 150
 151         return false;
 152 }
 153
 154 static int
 155 parse_static_address_option(struct interface *iface, struct blob_attr *attr,
 156                             bool v6, int netmask, bool ext, uint32_t broadcast,
 157                             bool deprecated)
 158 {
 159         struct blob_attr *cur;
 160         int n_addr = 0;
 161         int rem;
 162
 163         blobmsg_for_each_attr(cur, attr, rem) {
 164                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 165                         return -1;
 166
 167                 n_addr++;
 168                 if (!parse_addr(iface, blobmsg_data(cur), v6, netmask, ext,
 169                                 broadcast, deprecated))
 170                         return -1;
 171         }
 172
 173         return n_addr;
 174 }
 175
 176 static struct device_addr *
 177 parse_address_item(struct blob_attr *attr, bool v6, bool ext)
 178 {
 179         struct device_addr *addr;
 180         struct blob_attr *tb[__ADDR_MAX];
 181         struct blob_attr *cur;
 182
 183         if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
 184                 return NULL;
 185
 186         addr = alloc_device_addr(v6, ext);
 187         if (!addr)
 188                 return NULL;
 189
 190         blobmsg_parse(proto_ip_addr, __ADDR_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
 191
 192         addr->mask = v6 ? 128 : 32;
 193         if ((cur = tb[ADDR_MASK])) {
 194                 unsigned int new_mask;
 195
 196                 new_mask = parse_netmask_string(blobmsg_data(cur), v6);
 197                 if (new_mask > addr->mask)
 198                         goto error;
 199
 200                 addr->mask = new_mask;
 201         }
 202
 203         cur = tb[ADDR_IPADDR];
 204         if (!cur)
 205                 goto error;
 206
 207         if (!inet_pton(v6 ? AF_INET6 : AF_INET, blobmsg_data(cur), &addr->addr))
 208                 goto error;
 209
 210         if ((cur = tb[ADDR_OFFLINK]) && blobmsg_get_bool(cur))
 211                 addr->flags |= DEVADDR_OFFLINK;
 212
 213         if (!v6) {
 214                 if ((cur = tb[ADDR_BROADCAST]) &&
 215                     !inet_pton(AF_INET, blobmsg_data(cur), &addr->broadcast))
 216                         goto error;
 217                 if ((cur = tb[ADDR_PTP]) &&
 218                     !inet_pton(AF_INET, blobmsg_data(cur), &addr->point_to_point))
 219                         goto error;
 220         } else {
 221                 time_t now = system_get_rtime();
 222                 if ((cur = tb[ADDR_PREFERRED])) {
 223                         int64_t preferred = blobmsg_get_u32(cur);
 224                         int64_t preferred_until = preferred + (int64_t)now;
 225                         if (preferred_until <= LONG_MAX && preferred != 0xffffffffLL)
 226                                 addr->preferred_until = preferred_until;
 227                 }
 228
 229                 if ((cur = tb[ADDR_VALID])) {
 230                         int64_t valid = blobmsg_get_u32(cur);
 231                         int64_t valid_until = valid + (int64_t)now;
 232                         if (valid_until <= LONG_MAX && valid != 0xffffffffLL)
 233                                 addr->valid_until = valid_until;
 234
 235                 }
 236
 237                 if (addr->valid_until) {
 238                         if (!addr->preferred_until)
 239                                 addr->preferred_until = addr->valid_until;
 240                         else if (addr->preferred_until > addr->valid_until)
 241                                 goto error;
 242                 }
 243
 244                 if ((cur = tb[ADDR_CLASS]))
 245                         addr->pclass = strdup(blobmsg_get_string(cur));
 246         }
 247
 248         return addr;
 249
 250 error:
 251         free(addr);
 252         return NULL;
 253 }
 254
 255 static int
 256 parse_address_list(struct interface *iface, struct blob_attr *attr, bool v6,
 257                    bool ext)
 258 {
 259         struct device_addr *addr;
 260         struct blob_attr *cur;
 261         int n_addr = 0;
 262         int rem;
 263
 264         blobmsg_for_each_attr(cur, attr, rem) {
 265                 addr = parse_address_item(cur, v6, ext);
 266                 if (!addr)
 267                         return -1;
 268
 269                 n_addr++;
 270                 vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
 271         }
 272
 273         return n_addr;
 274 }
 275
 276 static bool
 277 parse_gateway_option(struct interface *iface, struct blob_attr *attr, bool v6)
 278 {
 279         struct device_route *route;
 280         const char *str = blobmsg_data(attr);
 281         int af = v6 ? AF_INET6 : AF_INET;
 282
 283         route = calloc(1, sizeof(*route));
 284         if (!route)
 285                 return NULL;
 286
 287         if (!inet_pton(af, str, &route->nexthop)) {
 288                 interface_add_error(iface, "proto", "INVALID_GATEWAY", &str, 1);
 289                 free(route);
 290                 return false;
 291         }
 292
 293         route->mask = 0;
 294         route->flags = (v6 ? DEVADDR_INET6 : DEVADDR_INET4);
 295         route->metric = iface->metric;
 296
 297         unsigned int table = (v6) ? iface->ip6table : iface->ip4table;
 298         if (table) {
 299                 route->table = table;
 300                 route->flags |= DEVROUTE_SRCTABLE;
 301         }
 302
 303         vlist_add(&iface->proto_ip.route, &route->node, route);
 304
 305         return true;
 306 }
 307
 308 static bool
 309 parse_prefix_option(struct interface *iface, const char *str, size_t len)
 310 {
 311         char buf[128] = {0}, *saveptr;
 312         if (len >= sizeof(buf))
 313                 return false;
 314
 315         memcpy(buf, str, len);
 316         char *addrstr = strtok_r(buf, "/", &saveptr);
 317         if (!addrstr)
 318                 return false;
 319
 320         char *lengthstr = strtok_r(NULL, ",", &saveptr);
 321         if (!lengthstr)
 322                 return false;
 323
 324         char *prefstr = strtok_r(NULL, ",", &saveptr);
 325         char *validstr = (!prefstr) ? NULL : strtok_r(NULL, ",", &saveptr);
 326         char *addstr = (!validstr) ? NULL : strtok_r(NULL, ",", &saveptr);
 327         const char *pclass = NULL;
 328
 329         int64_t pref = (!prefstr) ? 0 : strtoul(prefstr, NULL, 10);
 330         int64_t valid = (!validstr) ? 0 : strtoul(validstr, NULL, 10);
 331
 332         uint8_t length = strtoul(lengthstr, NULL, 10), excl_length = 0;
 333         if (length < 1 || length > 64)
 334                 return false;
 335
 336         struct in6_addr addr, excluded, *excludedp = NULL;
 337         if (inet_pton(AF_INET6, addrstr, &addr) < 1)
 338                 return false;
 339
 340         for (; addstr; addstr = strtok_r(NULL, ",", &saveptr)) {
 341                 char *key = NULL, *val = NULL, *addsaveptr;
 342                 if (!(key = strtok_r(addstr, "=", &addsaveptr)) ||
 343                                 !(val = strtok_r(NULL, ",", &addsaveptr)))
 344                         continue;
 345
 346                 if (!strcmp(key, "excluded")) {
 347                         char *sep = strchr(val, '/');
 348                         if (!sep)
 349                                 return false;
 350
 351                         *sep = 0;
 352                         excl_length = atoi(sep + 1);
 353
 354                         if (inet_pton(AF_INET6, val, &excluded) < 1)
 355                                 return false;
 356
 357                         excludedp = &excluded;
 358                 } else if (!strcmp(key, "class")) {
 359                         pclass = val;
 360                 }
 361
 362         }
 363
 364
 365
 366
 367         int64_t now = system_get_rtime();
 368         time_t preferred_until = 0;
 369         if (prefstr && pref != 0xffffffffLL && pref + now <= LONG_MAX)
 370                 preferred_until = pref + now;
 371
 372         time_t valid_until = 0;
 373         if (validstr && valid != 0xffffffffLL && valid + now <= LONG_MAX)
 374                 valid_until = valid + now;
 375
 376         interface_ip_add_device_prefix(iface, &addr, length,
 377                         valid_until, preferred_until,
 378                         excludedp, excl_length, pclass);
 379         return true;
 380 }
 381
 382 static int
 383 parse_prefix_list(struct interface *iface, struct blob_attr *attr)
 384 {
 385         struct blob_attr *cur;
 386         int n_addr = 0;
 387         int rem;
 388
 389         blobmsg_for_each_attr(cur, attr, rem) {
 390                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 391                         return -1;
 392
 393                 n_addr++;
 394                 if (!parse_prefix_option(iface, blobmsg_data(cur),
 395                                 blobmsg_data_len(cur)))
 396                         return -1;
 397         }
 398
 399         return n_addr;
 400 }
 401
 402 int
 403 proto_apply_static_ip_settings(struct interface *iface, struct blob_attr *attr)
 404 {
 405         struct blob_attr *tb[__OPT_MAX];
 406         struct blob_attr *cur;
 407         const char *error;
 408         unsigned int netmask = 32;
 409         bool ip6deprecated;
 410         int n_v4 = 0, n_v6 = 0;
 411         struct in_addr bcast = {};
 412
 413         blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
 414
 415         if ((cur = tb[OPT_NETMASK])) {
 416                 netmask = parse_netmask_string(blobmsg_data(cur), false);
 417                 if (netmask > 32) {
 418                         error = "INVALID_NETMASK";
 419                         goto error;
 420                 }
 421         }
 422
 423         if ((cur = tb[OPT_BROADCAST])) {
 424                 if (!inet_pton(AF_INET, blobmsg_data(cur), &bcast)) {
 425                         error = "INVALID_BROADCAST";
 426                         goto error;
 427                 }
 428         }
 429
 430         ip6deprecated = blobmsg_get_bool_default(tb[OPT_IP6DEPRECATED], false);
 431
 432         if ((cur = tb[OPT_IPADDR]))
 433                 n_v4 = parse_static_address_option(iface, cur, false,
 434                         netmask, false, bcast.s_addr, false);
 435
 436         if ((cur = tb[OPT_IP6ADDR]))
 437                 n_v6 = parse_static_address_option(iface, cur, true,
 438                         128, false, 0, ip6deprecated);
 439
 440         if ((cur = tb[OPT_IP6PREFIX]))
 441                 if (parse_prefix_list(iface, cur) < 0)
 442                         goto out;
 443
 444         if (n_v4 < 0 || n_v6 < 0)
 445                 goto out;
 446
 447         if ((cur = tb[OPT_GATEWAY])) {
 448                 if (n_v4 && !parse_gateway_option(iface, cur, false))
 449                         goto out;
 450         }
 451
 452         if ((cur = tb[OPT_IP6GW])) {
 453                 if (n_v6 && !parse_gateway_option(iface, cur, true))
 454                         goto out;
 455         }
 456
 457         return 0;
 458
 459 error:
 460         interface_add_error(iface, "proto", error, NULL, 0);
 461 out:
 462         return -1;
 463 }
 464
 465 int
 466 proto_apply_ip_settings(struct interface *iface, struct blob_attr *attr, bool ext)
 467 {
 468         struct blob_attr *tb[__OPT_MAX];
 469         struct blob_attr *cur;
 470         int n_v4 = 0, n_v6 = 0;
 471
 472         blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
 473
 474         if ((cur = tb[OPT_IPADDR]))
 475                 n_v4 = parse_address_list(iface, cur, false, ext);
 476
 477         if ((cur = tb[OPT_IP6ADDR]))
 478                 n_v6 = parse_address_list(iface, cur, true, ext);
 479
 480         if ((cur = tb[OPT_IP6PREFIX]))
 481                 if (parse_prefix_list(iface, cur) < 0)
 482                         goto out;
 483
 484         if (n_v4 < 0 || n_v6 < 0)
 485                 goto out;
 486
 487         if ((cur = tb[OPT_GATEWAY])) {
 488                 if (n_v4 && !parse_gateway_option(iface, cur, false))
 489                         goto out;
 490         }
 491
 492         if ((cur = tb[OPT_IP6GW])) {
 493                 if (n_v6 && !parse_gateway_option(iface, cur, true))
 494                         goto out;
 495         }
 496
 497         return 0;
 498
 499 out:
 500         return -1;
 501 }
 502
 503 void add_proto_handler(struct proto_handler *p)
 504 {
 505         if (!handlers.comp)
 506                 avl_init(&handlers, avl_strcmp, false, NULL);
 507
 508         if (p->avl.key)
 509                 return;
 510
 511         p->avl.key = p->name;
 512         avl_insert(&handlers, &p->avl);
 513 }
 514
 515 static void
 516 default_proto_free(struct interface_proto_state *proto)
 517 {
 518         free(proto);
 519 }
 520
 521 static int
 522 invalid_proto_handler(struct interface_proto_state *proto,
 523                       enum interface_proto_cmd cmd, bool force)
 524 {
 525         return -1;
 526 }
 527
 528 static int
 529 no_proto_handler(struct interface_proto_state *proto,
 530                  enum interface_proto_cmd cmd, bool force)
 531 {
 532         return 0;
 533 }
 534
 535 static struct interface_proto_state *
 536 default_proto_attach(const struct proto_handler *h,
 537                      struct interface *iface, struct blob_attr *attr)
 538 {
 539         struct interface_proto_state *proto;
 540
 541         proto = calloc(1, sizeof(*proto));
 542         if (!proto)
 543                 return NULL;
 544
 545         proto->free = default_proto_free;
 546         proto->cb = no_proto_handler;
 547
 548         return proto;
 549 }
 550
 551 static const struct proto_handler no_proto = {
 552         .name = "none",
 553         .flags = PROTO_FLAG_IMMEDIATE,
 554         .attach = default_proto_attach,
 555 };
 556
 557 static const struct proto_handler *
 558 get_proto_handler(const char *name)
 559 {
 560         struct proto_handler *proto;
 561
 562         if (!strcmp(name, "none"))
 563             return &no_proto;
 564
 565         if (!handlers.comp)
 566                 return NULL;
 567
 568         return avl_find_element(&handlers, name, proto, avl);
 569 }
 570
 571 void
 572 proto_dump_handlers(struct blob_buf *b)
 573 {
 574         struct proto_handler *p;
 575         void *c;
 576
 577         avl_for_each_element(&handlers, p, avl) {
 578                 void *v;
 579
 580                 c = blobmsg_open_table(b, p->name);
 581                 if (p->config_params->validate) {
 582                         int i;
 583
 584                         v = blobmsg_open_table(b, "validate");
 585                         for (i = 0; i < p->config_params->n_params; i++)
 586                                 blobmsg_add_string(b, p->config_params->params[i].name, uci_get_validate_string(p->config_params, i));
 587                         blobmsg_close_table(b, v);
 588                 }
 589                 blobmsg_add_u8(b, "immediate", !!(p->flags & PROTO_FLAG_IMMEDIATE));
 590                 blobmsg_add_u8(b, "no_device", !!(p->flags & PROTO_FLAG_NODEV));
 591                 blobmsg_add_u8(b, "init_available", !!(p->flags & PROTO_FLAG_INIT_AVAILABLE));
 592                 blobmsg_add_u8(b, "renew_available", !!(p->flags & PROTO_FLAG_RENEW_AVAILABLE));
 593                 blobmsg_add_u8(b, "force_link_default", !!(p->flags & PROTO_FLAG_FORCE_LINK_DEFAULT));
 594                 blobmsg_add_u8(b, "last_error", !!(p->flags & PROTO_FLAG_LASTERROR));
 595                 blobmsg_add_u8(b, "teardown_on_l3_link_down", !!(p->flags & PROTO_FLAG_TEARDOWN_ON_L3_LINK_DOWN));
 596                 blobmsg_add_u8(b, "no_task", !!(p->flags & PROTO_FLAG_NO_TASK));
 597                 blobmsg_close_table(b, c);
 598         }
 599 }
 600
 601 void
 602 proto_init_interface(struct interface *iface, struct blob_attr *attr)
 603 {
 604         const struct proto_handler *proto = iface->proto_handler;
 605         struct interface_proto_state *state = NULL;
 606
 607         if (!proto)
 608                 proto = &no_proto;
 609
 610         state = proto->attach(proto, iface, attr);
 611         if (!state) {
 612                 state = no_proto.attach(&no_proto, iface, attr);
 613                 state->cb = invalid_proto_handler;
 614         }
 615
 616         state->handler = proto;
 617         interface_set_proto_state(iface, state);
 618 }
 619
 620 void
 621 proto_attach_interface(struct interface *iface, const char *proto_name)
 622 {
 623         const struct proto_handler *proto = &no_proto;
 624         const char *error = NULL;
 625
 626         if (proto_name) {
 627                 proto = get_proto_handler(proto_name);
 628                 if (!proto) {
 629                         error = "INVALID_PROTO";
 630                         proto = &no_proto;
 631                 }
 632         }
 633
 634         iface->proto_handler = proto;
 635
 636         if (error)
 637                 interface_add_error(iface, "proto", error, NULL, 0);
 638 }
 639
 640 int
 641 interface_proto_event(struct interface_proto_state *proto,
 642                       enum interface_proto_cmd cmd, bool force)
 643 {
 644         enum interface_proto_event ev;
 645         int ret;
 646
 647         ret = proto->cb(proto, cmd, force);
 648         if (ret || !(proto->handler->flags & PROTO_FLAG_IMMEDIATE))
 649                 goto out;
 650
 651         switch(cmd) {
 652         case PROTO_CMD_SETUP:
 653                 ev = IFPEV_UP;
 654                 break;
 655         case PROTO_CMD_TEARDOWN:
 656                 ev = IFPEV_DOWN;
 657                 break;
 658         case PROTO_CMD_RENEW:
 659                 ev = IFPEV_RENEW;
 660                 break;
 661         default:
 662                 return -EINVAL;
 663         }
 664         proto->proto_event(proto, ev);
 665
 666 out:
 667         return ret;
 668 }