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;
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 },
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 },
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",
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,
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 },
100 static struct device_addr *
101 alloc_device_addr(bool v6, bool ext)
103 struct device_addr *addr;
105 addr = calloc(1, sizeof(*addr));
109 addr->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
111 addr->flags |= DEVADDR_EXTERNAL;
117 parse_addr(struct interface *iface, const char *str, bool v6, int mask,
118 bool ext, uint32_t broadcast, bool deprecated)
120 struct device_addr *addr;
121 int af = v6 ? AF_INET6 : AF_INET;
123 addr = alloc_device_addr(v6, ext);
128 if (!parse_ip_and_netmask(af, str, &addr->addr, &addr->mask))
132 if (IN_EXPERIMENTAL(ntohl(addr->addr.in.s_addr)))
135 } else if (IN6_IS_ADDR_MULTICAST(&addr->addr.in6))
139 addr->broadcast = broadcast;
142 addr->preferred_until = system_get_rtime();
144 vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
148 interface_add_error(iface, "proto", "INVALID_ADDRESS", &str, 1);
155 parse_static_address_option(struct interface *iface, struct blob_attr *attr,
156 bool v6, int netmask, bool ext, uint32_t broadcast,
159 struct blob_attr *cur;
163 blobmsg_for_each_attr(cur, attr, rem) {
164 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
168 if (!parse_addr(iface, blobmsg_data(cur), v6, netmask, ext,
169 broadcast, deprecated))
176 static struct device_addr *
177 parse_address_item(struct blob_attr *attr, bool v6, bool ext)
179 struct device_addr *addr;
180 struct blob_attr *tb[__ADDR_MAX];
181 struct blob_attr *cur;
183 if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
186 addr = alloc_device_addr(v6, ext);
190 blobmsg_parse(proto_ip_addr, __ADDR_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
192 addr->mask = v6 ? 128 : 32;
193 if ((cur = tb[ADDR_MASK])) {
194 unsigned int new_mask;
196 new_mask = parse_netmask_string(blobmsg_data(cur), v6);
197 if (new_mask > addr->mask)
200 addr->mask = new_mask;
203 cur = tb[ADDR_IPADDR];
207 if (!inet_pton(v6 ? AF_INET6 : AF_INET, blobmsg_data(cur), &addr->addr))
210 if ((cur = tb[ADDR_OFFLINK]) && blobmsg_get_bool(cur))
211 addr->flags |= DEVADDR_OFFLINK;
214 if ((cur = tb[ADDR_BROADCAST]) &&
215 !inet_pton(AF_INET, blobmsg_data(cur), &addr->broadcast))
217 if ((cur = tb[ADDR_PTP]) &&
218 !inet_pton(AF_INET, blobmsg_data(cur), &addr->point_to_point))
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;
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;
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)
244 if ((cur = tb[ADDR_CLASS]))
245 addr->pclass = strdup(blobmsg_get_string(cur));
256 parse_address_list(struct interface *iface, struct blob_attr *attr, bool v6,
259 struct device_addr *addr;
260 struct blob_attr *cur;
264 blobmsg_for_each_attr(cur, attr, rem) {
265 addr = parse_address_item(cur, v6, ext);
270 vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
277 parse_gateway_option(struct interface *iface, struct blob_attr *attr, bool v6)
279 struct device_route *route;
280 const char *str = blobmsg_data(attr);
281 int af = v6 ? AF_INET6 : AF_INET;
283 route = calloc(1, sizeof(*route));
287 if (!inet_pton(af, str, &route->nexthop)) {
288 interface_add_error(iface, "proto", "INVALID_GATEWAY", &str, 1);
294 route->flags = (v6 ? DEVADDR_INET6 : DEVADDR_INET4);
295 route->metric = iface->metric;
297 unsigned int table = (v6) ? iface->ip6table : iface->ip4table;
299 route->table = table;
300 route->flags |= DEVROUTE_SRCTABLE;
303 vlist_add(&iface->proto_ip.route, &route->node, route);
309 parse_prefix_option(struct interface *iface, const char *str, size_t len)
311 char buf[128] = {0}, *saveptr;
312 if (len >= sizeof(buf))
315 memcpy(buf, str, len);
316 char *addrstr = strtok_r(buf, "/", &saveptr);
320 char *lengthstr = strtok_r(NULL, ",", &saveptr);
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;
329 int64_t pref = (!prefstr) ? 0 : strtoul(prefstr, NULL, 10);
330 int64_t valid = (!validstr) ? 0 : strtoul(validstr, NULL, 10);
332 uint8_t length = strtoul(lengthstr, NULL, 10), excl_length = 0;
333 if (length < 1 || length > 64)
336 struct in6_addr addr, excluded, *excludedp = NULL;
337 if (inet_pton(AF_INET6, addrstr, &addr) < 1)
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)))
346 if (!strcmp(key, "excluded")) {
347 char *sep = strchr(val, '/');
352 excl_length = atoi(sep + 1);
354 if (inet_pton(AF_INET6, val, &excluded) < 1)
357 excludedp = &excluded;
358 } else if (!strcmp(key, "class")) {
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;
372 time_t valid_until = 0;
373 if (validstr && valid != 0xffffffffLL && valid + now <= LONG_MAX)
374 valid_until = valid + now;
376 interface_ip_add_device_prefix(iface, &addr, length,
377 valid_until, preferred_until,
378 excludedp, excl_length, pclass);
383 parse_prefix_list(struct interface *iface, struct blob_attr *attr)
385 struct blob_attr *cur;
389 blobmsg_for_each_attr(cur, attr, rem) {
390 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
394 if (!parse_prefix_option(iface, blobmsg_data(cur),
395 blobmsg_data_len(cur)))
403 proto_apply_static_ip_settings(struct interface *iface, struct blob_attr *attr)
405 struct blob_attr *tb[__OPT_MAX];
406 struct blob_attr *cur;
408 unsigned int netmask = 32;
410 int n_v4 = 0, n_v6 = 0;
411 struct in_addr bcast = {};
413 blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
415 if ((cur = tb[OPT_NETMASK])) {
416 netmask = parse_netmask_string(blobmsg_data(cur), false);
418 error = "INVALID_NETMASK";
423 if ((cur = tb[OPT_BROADCAST])) {
424 if (!inet_pton(AF_INET, blobmsg_data(cur), &bcast)) {
425 error = "INVALID_BROADCAST";
430 ip6deprecated = blobmsg_get_bool_default(tb[OPT_IP6DEPRECATED], false);
432 if ((cur = tb[OPT_IPADDR]))
433 n_v4 = parse_static_address_option(iface, cur, false,
434 netmask, false, bcast.s_addr, false);
436 if ((cur = tb[OPT_IP6ADDR]))
437 n_v6 = parse_static_address_option(iface, cur, true,
438 128, false, 0, ip6deprecated);
440 if ((cur = tb[OPT_IP6PREFIX]))
441 if (parse_prefix_list(iface, cur) < 0)
444 if (n_v4 < 0 || n_v6 < 0)
447 if ((cur = tb[OPT_GATEWAY])) {
448 if (n_v4 && !parse_gateway_option(iface, cur, false))
452 if ((cur = tb[OPT_IP6GW])) {
453 if (n_v6 && !parse_gateway_option(iface, cur, true))
460 interface_add_error(iface, "proto", error, NULL, 0);
466 proto_apply_ip_settings(struct interface *iface, struct blob_attr *attr, bool ext)
468 struct blob_attr *tb[__OPT_MAX];
469 struct blob_attr *cur;
470 int n_v4 = 0, n_v6 = 0;
472 blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
474 if ((cur = tb[OPT_IPADDR]))
475 n_v4 = parse_address_list(iface, cur, false, ext);
477 if ((cur = tb[OPT_IP6ADDR]))
478 n_v6 = parse_address_list(iface, cur, true, ext);
480 if ((cur = tb[OPT_IP6PREFIX]))
481 if (parse_prefix_list(iface, cur) < 0)
484 if (n_v4 < 0 || n_v6 < 0)
487 if ((cur = tb[OPT_GATEWAY])) {
488 if (n_v4 && !parse_gateway_option(iface, cur, false))
492 if ((cur = tb[OPT_IP6GW])) {
493 if (n_v6 && !parse_gateway_option(iface, cur, true))
503 void add_proto_handler(struct proto_handler *p)
506 avl_init(&handlers, avl_strcmp, false, NULL);
511 p->avl.key = p->name;
512 avl_insert(&handlers, &p->avl);
516 default_proto_free(struct interface_proto_state *proto)
522 invalid_proto_handler(struct interface_proto_state *proto,
523 enum interface_proto_cmd cmd, bool force)
529 no_proto_handler(struct interface_proto_state *proto,
530 enum interface_proto_cmd cmd, bool force)
535 static struct interface_proto_state *
536 default_proto_attach(const struct proto_handler *h,
537 struct interface *iface, struct blob_attr *attr)
539 struct interface_proto_state *proto;
541 proto = calloc(1, sizeof(*proto));
545 proto->free = default_proto_free;
546 proto->cb = no_proto_handler;
551 static const struct proto_handler no_proto = {
553 .flags = PROTO_FLAG_IMMEDIATE,
554 .attach = default_proto_attach,
557 static const struct proto_handler *
558 get_proto_handler(const char *name)
560 struct proto_handler *proto;
562 if (!strcmp(name, "none"))
568 return avl_find_element(&handlers, name, proto, avl);
572 proto_dump_handlers(struct blob_buf *b)
574 struct proto_handler *p;
577 avl_for_each_element(&handlers, p, avl) {
580 c = blobmsg_open_table(b, p->name);
581 if (p->config_params->validate) {
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);
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);
602 proto_init_interface(struct interface *iface, struct blob_attr *attr)
604 const struct proto_handler *proto = iface->proto_handler;
605 struct interface_proto_state *state = NULL;
610 state = proto->attach(proto, iface, attr);
612 state = no_proto.attach(&no_proto, iface, attr);
613 state->cb = invalid_proto_handler;
616 state->handler = proto;
617 interface_set_proto_state(iface, state);
621 proto_attach_interface(struct interface *iface, const char *proto_name)
623 const struct proto_handler *proto = &no_proto;
624 const char *error = NULL;
627 proto = get_proto_handler(proto_name);
629 error = "INVALID_PROTO";
634 iface->proto_handler = proto;
637 interface_add_error(iface, "proto", error, NULL, 0);
641 interface_proto_event(struct interface_proto_state *proto,
642 enum interface_proto_cmd cmd, bool force)
644 enum interface_proto_event ev;
647 ret = proto->cb(proto, cmd, force);
648 if (ret || !(proto->handler->flags & PROTO_FLAG_IMMEDIATE))
652 case PROTO_CMD_SETUP:
655 case PROTO_CMD_TEARDOWN:
658 case PROTO_CMD_RENEW:
664 proto->proto_event(proto, ev);