2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2012 Steven Barth <steven@midlink.org>
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
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.
20 #include <arpa/inet.h>
21 #include <netinet/in.h>
25 #include "interface.h"
26 #include "interface-ip.h"
29 static struct avl_tree handlers;
42 static const struct blobmsg_policy proto_ip_attributes[__OPT_MAX] = {
43 [OPT_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_ARRAY },
44 [OPT_IP6ADDR] = { .name = "ip6addr", .type = BLOBMSG_TYPE_ARRAY },
45 [OPT_NETMASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING },
46 [OPT_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
47 [OPT_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
48 [OPT_IP6GW] = { .name = "ip6gw", .type = BLOBMSG_TYPE_STRING },
49 [OPT_IP6PREFIX] = { .name = "ip6prefix", .type = BLOBMSG_TYPE_ARRAY },
52 static const struct uci_blob_param_info proto_ip_attr_info[__OPT_MAX] = {
53 [OPT_IPADDR] = { .type = BLOBMSG_TYPE_STRING },
54 [OPT_IP6ADDR] = { .type = BLOBMSG_TYPE_STRING },
55 [OPT_IP6PREFIX] = { .type = BLOBMSG_TYPE_STRING },
58 static const char * const proto_ip_validate[__OPT_MAX] = {
59 [OPT_IPADDR] = "ip4addr",
60 [OPT_IP6ADDR] = "ip6addr",
61 [OPT_NETMASK] = "netmask",
62 [OPT_BROADCAST] = "ipaddr",
63 [OPT_GATEWAY] = "ip4addr",
64 [OPT_IP6GW] = "ip6addr",
65 [OPT_IP6PREFIX] = "ip6addr",
68 const struct uci_blob_param_list proto_ip_attr = {
69 .n_params = __OPT_MAX,
70 .params = proto_ip_attributes,
71 .validate = proto_ip_validate,
72 .info = proto_ip_attr_info,
87 static const struct blobmsg_policy proto_ip_addr[__ADDR_MAX] = {
88 [ADDR_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_STRING },
89 [ADDR_MASK] = { .name = "mask", .type = BLOBMSG_TYPE_STRING },
90 [ADDR_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
91 [ADDR_PTP] = { .name = "ptp", .type = BLOBMSG_TYPE_STRING },
92 [ADDR_PREFERRED] = { .name = "preferred", .type = BLOBMSG_TYPE_INT32 },
93 [ADDR_VALID] = { .name = "valid", .type = BLOBMSG_TYPE_INT32 },
94 [ADDR_OFFLINK] = { .name = "offlink", .type = BLOBMSG_TYPE_BOOL },
95 [ADDR_CLASS] = { .name = "class", .type = BLOBMSG_TYPE_STRING },
98 static struct device_addr *
99 alloc_device_addr(bool v6, bool ext)
101 struct device_addr *addr;
103 addr = calloc(1, sizeof(*addr));
107 addr->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
109 addr->flags |= DEVADDR_EXTERNAL;
115 parse_addr(struct interface *iface, const char *str, bool v6, int mask,
116 bool ext, uint32_t broadcast)
118 struct device_addr *addr;
119 int af = v6 ? AF_INET6 : AF_INET;
121 addr = alloc_device_addr(v6, ext);
126 if (!parse_ip_and_netmask(af, str, &addr->addr, &addr->mask))
130 if (IN_EXPERIMENTAL(ntohl(addr->addr.in.s_addr)))
133 } else if (IN6_IS_ADDR_MULTICAST(&addr->addr.in6))
137 addr->broadcast = broadcast;
139 vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
143 interface_add_error(iface, "proto", "INVALID_ADDRESS", &str, 1);
150 parse_static_address_option(struct interface *iface, struct blob_attr *attr,
151 bool v6, int netmask, bool ext, uint32_t broadcast)
153 struct blob_attr *cur;
157 blobmsg_for_each_attr(cur, attr, rem) {
158 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
162 if (!parse_addr(iface, blobmsg_data(cur), v6, netmask, ext,
170 static struct device_addr *
171 parse_address_item(struct blob_attr *attr, bool v6, bool ext)
173 struct device_addr *addr;
174 struct blob_attr *tb[__ADDR_MAX];
175 struct blob_attr *cur;
177 if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
180 addr = alloc_device_addr(v6, ext);
184 blobmsg_parse(proto_ip_addr, __ADDR_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
186 addr->mask = v6 ? 128 : 32;
187 if ((cur = tb[ADDR_MASK])) {
188 unsigned int new_mask;
190 new_mask = parse_netmask_string(blobmsg_data(cur), v6);
191 if (new_mask > addr->mask)
194 addr->mask = new_mask;
197 cur = tb[ADDR_IPADDR];
201 if (!inet_pton(v6 ? AF_INET6 : AF_INET, blobmsg_data(cur), &addr->addr))
204 if ((cur = tb[ADDR_OFFLINK]) && blobmsg_get_bool(cur))
205 addr->flags |= DEVADDR_OFFLINK;
208 if ((cur = tb[ADDR_BROADCAST]) &&
209 !inet_pton(AF_INET, blobmsg_data(cur), &addr->broadcast))
211 if ((cur = tb[ADDR_PTP]) &&
212 !inet_pton(AF_INET, blobmsg_data(cur), &addr->point_to_point))
215 time_t now = system_get_rtime();
216 if ((cur = tb[ADDR_PREFERRED])) {
217 int64_t preferred = blobmsg_get_u32(cur);
218 int64_t preferred_until = preferred + (int64_t)now;
219 if (preferred_until <= LONG_MAX && preferred != 0xffffffffLL)
220 addr->preferred_until = preferred_until;
223 if ((cur = tb[ADDR_VALID])) {
224 int64_t valid = blobmsg_get_u32(cur);
225 int64_t valid_until = valid + (int64_t)now;
226 if (valid_until <= LONG_MAX && valid != 0xffffffffLL)
227 addr->valid_until = valid_until;
231 if (addr->valid_until) {
232 if (!addr->preferred_until)
233 addr->preferred_until = addr->valid_until;
234 else if (addr->preferred_until > addr->valid_until)
238 if ((cur = tb[ADDR_CLASS]))
239 addr->pclass = strdup(blobmsg_get_string(cur));
250 parse_address_list(struct interface *iface, struct blob_attr *attr, bool v6,
253 struct device_addr *addr;
254 struct blob_attr *cur;
258 blobmsg_for_each_attr(cur, attr, rem) {
259 addr = parse_address_item(cur, v6, ext);
264 vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
271 parse_gateway_option(struct interface *iface, struct blob_attr *attr, bool v6)
273 struct device_route *route;
274 const char *str = blobmsg_data(attr);
275 int af = v6 ? AF_INET6 : AF_INET;
277 route = calloc(1, sizeof(*route));
281 if (!inet_pton(af, str, &route->nexthop)) {
282 interface_add_error(iface, "proto", "INVALID_GATEWAY", &str, 1);
288 route->flags = (v6 ? DEVADDR_INET6 : DEVADDR_INET4);
289 route->metric = iface->metric;
291 unsigned int table = (v6) ? iface->ip6table : iface->ip4table;
293 route->table = table;
294 route->flags |= DEVROUTE_SRCTABLE;
297 vlist_add(&iface->proto_ip.route, &route->node, route);
303 parse_prefix_option(struct interface *iface, const char *str, size_t len)
305 char buf[128] = {0}, *saveptr;
306 if (len >= sizeof(buf))
309 memcpy(buf, str, len);
310 char *addrstr = strtok_r(buf, "/", &saveptr);
314 char *lengthstr = strtok_r(NULL, ",", &saveptr);
318 char *prefstr = strtok_r(NULL, ",", &saveptr);
319 char *validstr = (!prefstr) ? NULL : strtok_r(NULL, ",", &saveptr);
320 char *addstr = (!validstr) ? NULL : strtok_r(NULL, ",", &saveptr);
321 const char *pclass = NULL;
323 int64_t pref = (!prefstr) ? 0 : strtoul(prefstr, NULL, 10);
324 int64_t valid = (!validstr) ? 0 : strtoul(validstr, NULL, 10);
326 uint8_t length = strtoul(lengthstr, NULL, 10), excl_length = 0;
327 if (length < 1 || length > 64)
330 struct in6_addr addr, excluded, *excludedp = NULL;
331 if (inet_pton(AF_INET6, addrstr, &addr) < 1)
334 for (; addstr; addstr = strtok_r(NULL, ",", &saveptr)) {
335 char *key = NULL, *val = NULL, *addsaveptr;
336 if (!(key = strtok_r(addstr, "=", &addsaveptr)) ||
337 !(val = strtok_r(NULL, ",", &addsaveptr)))
340 if (!strcmp(key, "excluded")) {
341 char *sep = strchr(val, '/');
346 excl_length = atoi(sep + 1);
348 if (inet_pton(AF_INET6, val, &excluded) < 1)
351 excludedp = &excluded;
352 } else if (!strcmp(key, "class")) {
361 int64_t now = system_get_rtime();
362 time_t preferred_until = 0;
363 if (prefstr && pref != 0xffffffffLL && pref + now <= LONG_MAX)
364 preferred_until = pref + now;
366 time_t valid_until = 0;
367 if (validstr && valid != 0xffffffffLL && valid + now <= LONG_MAX)
368 valid_until = valid + now;
370 interface_ip_add_device_prefix(iface, &addr, length,
371 valid_until, preferred_until,
372 excludedp, excl_length, pclass);
377 parse_prefix_list(struct interface *iface, struct blob_attr *attr)
379 struct blob_attr *cur;
383 blobmsg_for_each_attr(cur, attr, rem) {
384 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
388 if (!parse_prefix_option(iface, blobmsg_data(cur),
389 blobmsg_data_len(cur)))
397 proto_apply_static_ip_settings(struct interface *iface, struct blob_attr *attr)
399 struct blob_attr *tb[__OPT_MAX];
400 struct blob_attr *cur;
402 unsigned int netmask = 32;
403 int n_v4 = 0, n_v6 = 0;
404 struct in_addr bcast = {};
406 blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
408 if ((cur = tb[OPT_NETMASK])) {
409 netmask = parse_netmask_string(blobmsg_data(cur), false);
411 error = "INVALID_NETMASK";
416 if ((cur = tb[OPT_BROADCAST])) {
417 if (!inet_pton(AF_INET, blobmsg_data(cur), &bcast)) {
418 error = "INVALID_BROADCAST";
423 if ((cur = tb[OPT_IPADDR]))
424 n_v4 = parse_static_address_option(iface, cur, false,
425 netmask, false, bcast.s_addr);
427 if ((cur = tb[OPT_IP6ADDR]))
428 n_v6 = parse_static_address_option(iface, cur, true,
431 if ((cur = tb[OPT_IP6PREFIX]))
432 if (parse_prefix_list(iface, cur) < 0)
435 if (n_v4 < 0 || n_v6 < 0)
438 if ((cur = tb[OPT_GATEWAY])) {
439 if (n_v4 && !parse_gateway_option(iface, cur, false))
443 if ((cur = tb[OPT_IP6GW])) {
444 if (n_v6 && !parse_gateway_option(iface, cur, true))
451 interface_add_error(iface, "proto", error, NULL, 0);
457 proto_apply_ip_settings(struct interface *iface, struct blob_attr *attr, bool ext)
459 struct blob_attr *tb[__OPT_MAX];
460 struct blob_attr *cur;
461 int n_v4 = 0, n_v6 = 0;
463 blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
465 if ((cur = tb[OPT_IPADDR]))
466 n_v4 = parse_address_list(iface, cur, false, ext);
468 if ((cur = tb[OPT_IP6ADDR]))
469 n_v6 = parse_address_list(iface, cur, true, ext);
471 if ((cur = tb[OPT_IP6PREFIX]))
472 if (parse_prefix_list(iface, cur) < 0)
475 if (n_v4 < 0 || n_v6 < 0)
478 if ((cur = tb[OPT_GATEWAY])) {
479 if (n_v4 && !parse_gateway_option(iface, cur, false))
483 if ((cur = tb[OPT_IP6GW])) {
484 if (n_v6 && !parse_gateway_option(iface, cur, true))
494 void add_proto_handler(struct proto_handler *p)
497 avl_init(&handlers, avl_strcmp, false, NULL);
502 p->avl.key = p->name;
503 avl_insert(&handlers, &p->avl);
507 default_proto_free(struct interface_proto_state *proto)
513 invalid_proto_handler(struct interface_proto_state *proto,
514 enum interface_proto_cmd cmd, bool force)
520 no_proto_handler(struct interface_proto_state *proto,
521 enum interface_proto_cmd cmd, bool force)
526 static struct interface_proto_state *
527 default_proto_attach(const struct proto_handler *h,
528 struct interface *iface, struct blob_attr *attr)
530 struct interface_proto_state *proto;
532 proto = calloc(1, sizeof(*proto));
536 proto->free = default_proto_free;
537 proto->cb = no_proto_handler;
542 static const struct proto_handler no_proto = {
544 .flags = PROTO_FLAG_IMMEDIATE,
545 .attach = default_proto_attach,
548 static const struct proto_handler *
549 get_proto_handler(const char *name)
551 struct proto_handler *proto;
553 if (!strcmp(name, "none"))
559 return avl_find_element(&handlers, name, proto, avl);
563 proto_dump_handlers(struct blob_buf *b)
565 struct proto_handler *p;
568 avl_for_each_element(&handlers, p, avl) {
571 c = blobmsg_open_table(b, p->name);
572 if (p->config_params->validate) {
575 v = blobmsg_open_table(b, "validate");
576 for (i = 0; i < p->config_params->n_params; i++)
577 blobmsg_add_string(b, p->config_params->params[i].name, uci_get_validate_string(p->config_params, i));
578 blobmsg_close_table(b, v);
580 blobmsg_add_u8(b, "immediate", !!(p->flags & PROTO_FLAG_IMMEDIATE));
581 blobmsg_add_u8(b, "no_device", !!(p->flags & PROTO_FLAG_NODEV));
582 blobmsg_add_u8(b, "init_available", !!(p->flags & PROTO_FLAG_INIT_AVAILABLE));
583 blobmsg_add_u8(b, "renew_available", !!(p->flags & PROTO_FLAG_RENEW_AVAILABLE));
584 blobmsg_add_u8(b, "force_link_default", !!(p->flags & PROTO_FLAG_FORCE_LINK_DEFAULT));
585 blobmsg_add_u8(b, "last_error", !!(p->flags & PROTO_FLAG_LASTERROR));
586 blobmsg_add_u8(b, "teardown_on_l3_link_down", !!(p->flags & PROTO_FLAG_TEARDOWN_ON_L3_LINK_DOWN));
587 blobmsg_add_u8(b, "no_task", !!(p->flags & PROTO_FLAG_NO_TASK));
588 blobmsg_close_table(b, c);
593 proto_init_interface(struct interface *iface, struct blob_attr *attr)
595 const struct proto_handler *proto = iface->proto_handler;
596 struct interface_proto_state *state = NULL;
601 state = proto->attach(proto, iface, attr);
603 state = no_proto.attach(&no_proto, iface, attr);
604 state->cb = invalid_proto_handler;
607 state->handler = proto;
608 interface_set_proto_state(iface, state);
612 proto_attach_interface(struct interface *iface, const char *proto_name)
614 const struct proto_handler *proto = &no_proto;
615 const char *error = NULL;
618 proto = get_proto_handler(proto_name);
620 error = "INVALID_PROTO";
625 iface->proto_handler = proto;
628 interface_add_error(iface, "proto", error, NULL, 0);
632 interface_proto_event(struct interface_proto_state *proto,
633 enum interface_proto_cmd cmd, bool force)
635 enum interface_proto_event ev;
638 ret = proto->cb(proto, cmd, force);
639 if (ret || !(proto->handler->flags & PROTO_FLAG_IMMEDIATE))
643 case PROTO_CMD_SETUP:
646 case PROTO_CMD_TEARDOWN:
649 case PROTO_CMD_RENEW:
655 proto->proto_event(proto, ev);