2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
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
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.
18 #include <arpa/inet.h>
19 #include <netinet/in.h>
23 #include "interface.h"
24 #include "interface-ip.h"
27 static struct avl_tree handlers;
41 static const struct blobmsg_policy proto_ip_attributes[__OPT_MAX] = {
42 [OPT_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_ARRAY },
43 [OPT_IP6ADDR] = { .name = "ip6addr", .type = BLOBMSG_TYPE_ARRAY },
44 [OPT_NETMASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING },
45 [OPT_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
46 [OPT_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
47 [OPT_IP6GW] = { .name = "ip6gw", .type = BLOBMSG_TYPE_STRING },
48 [OPT_IP6PREFIX] = { .name = "ip6prefix", .type = BLOBMSG_TYPE_ARRAY },
49 [OPT_IP6ASSIGN] = { .name = "ip6assign", .type = BLOBMSG_TYPE_INT32 },
52 static const union config_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 const struct config_param_list proto_ip_attr = {
59 .n_params = __OPT_MAX,
60 .params = proto_ip_attributes,
61 .info = proto_ip_attr_info,
75 static const struct blobmsg_policy proto_ip_addr[__ADDR_MAX] = {
76 [ADDR_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_STRING },
77 [ADDR_MASK] = { .name = "mask", .type = BLOBMSG_TYPE_STRING },
78 [ADDR_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
79 [ADDR_PTP] = { .name = "ptp", .type = BLOBMSG_TYPE_STRING },
80 [ADDR_PREFERRED] = { .name = "preferred", .type = BLOBMSG_TYPE_INT32 },
81 [ADDR_VALID] = { .name = "valid", .type = BLOBMSG_TYPE_INT32 },
82 [ADDR_OFFLINK] = { .name = "offlink", .type = BLOBMSG_TYPE_BOOL },
85 static struct device_addr *
86 alloc_device_addr(bool v6, bool ext)
88 struct device_addr *addr;
90 addr = calloc(1, sizeof(*addr));
91 addr->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
93 addr->flags |= DEVADDR_EXTERNAL;
99 parse_addr(struct interface *iface, const char *str, bool v6, int mask,
100 bool ext, uint32_t broadcast)
102 struct device_addr *addr;
103 int af = v6 ? AF_INET6 : AF_INET;
105 addr = alloc_device_addr(v6, ext);
110 if (!parse_ip_and_netmask(af, str, &addr->addr, &addr->mask)) {
111 interface_add_error(iface, "proto", "INVALID_ADDRESS", &str, 1);
117 addr->broadcast = broadcast;
119 vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
124 parse_static_address_option(struct interface *iface, struct blob_attr *attr,
125 bool v6, int netmask, bool ext, uint32_t broadcast)
127 struct blob_attr *cur;
131 blobmsg_for_each_attr(cur, attr, rem) {
132 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
136 if (!parse_addr(iface, blobmsg_data(cur), v6, netmask, ext,
144 static struct device_addr *
145 parse_address_item(struct blob_attr *attr, bool v6, bool ext)
147 struct device_addr *addr;
148 struct blob_attr *tb[__ADDR_MAX];
149 struct blob_attr *cur;
151 if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
154 addr = alloc_device_addr(v6, ext);
158 blobmsg_parse(proto_ip_addr, __ADDR_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
160 addr->mask = v6 ? 128 : 32;
161 if ((cur = tb[ADDR_MASK])) {
162 unsigned int new_mask;
164 new_mask = parse_netmask_string(blobmsg_data(cur), v6);
165 if (new_mask > addr->mask)
168 addr->mask = new_mask;
171 cur = tb[ADDR_IPADDR];
175 if (!inet_pton(v6 ? AF_INET6 : AF_INET, blobmsg_data(cur), &addr->addr))
178 if ((cur = tb[ADDR_OFFLINK]) && blobmsg_get_bool(cur))
179 addr->flags |= DEVADDR_OFFLINK;
182 if ((cur = tb[ADDR_BROADCAST]) &&
183 !inet_pton(AF_INET, blobmsg_data(cur), &addr->broadcast))
185 if ((cur = tb[ADDR_PTP]) &&
186 !inet_pton(AF_INET, blobmsg_data(cur), &addr->point_to_point))
189 time_t now = system_get_rtime();
190 if ((cur = tb[ADDR_PREFERRED])) {
191 uint32_t preferred = blobmsg_get_u32(cur);
192 if (preferred < UINT32_MAX)
193 addr->preferred_until = now + preferred;
196 if ((cur = tb[ADDR_VALID])) {
197 uint32_t valid = blobmsg_get_u32(cur);
198 if (valid < UINT32_MAX)
199 addr->valid_until = now + valid;
203 if (addr->valid_until) {
204 if (!addr->preferred_until)
205 addr->preferred_until = addr->valid_until;
206 else if (addr->preferred_until > addr->valid_until)
219 parse_address_list(struct interface *iface, struct blob_attr *attr, bool v6,
222 struct device_addr *addr;
223 struct blob_attr *cur;
227 blobmsg_for_each_attr(cur, attr, rem) {
228 addr = parse_address_item(cur, v6, ext);
233 vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
240 parse_gateway_option(struct interface *iface, struct blob_attr *attr, bool v6)
242 struct device_route *route;
243 const char *str = blobmsg_data(attr);
244 int af = v6 ? AF_INET6 : AF_INET;
246 route = calloc(1, sizeof(*route));
247 if (!inet_pton(af, str, &route->nexthop)) {
248 interface_add_error(iface, "proto", "INVALID_GATEWAY", &str, 1);
254 route->flags = (v6 ? DEVADDR_INET6 : DEVADDR_INET4);
255 vlist_add(&iface->proto_ip.route, &route->node, &route->flags);
261 parse_ip6assign_option(struct interface *iface, struct blob_attr *attr)
263 uint8_t oldval = iface->proto_ip.assignment_length;
264 uint8_t newval = blobmsg_get_u32(attr);
266 struct device_prefix *prefix;
267 list_for_each_entry(prefix, &prefixes, head) {
268 if (oldval && oldval != newval)
269 interface_ip_set_prefix_assignment(prefix, iface, 0);
271 if (newval && newval <= 64)
272 interface_ip_set_prefix_assignment(prefix, iface, newval);
275 iface->proto_ip.assignment_length = newval;
280 parse_prefix_option(struct interface *iface, const char *str, size_t len)
282 char buf[128] = {0}, *saveptr;
283 if (len > sizeof(buf))
286 memcpy(buf, str, len);
287 char *addrstr = strtok_r(buf, "/", &saveptr);
291 char *lengthstr = strtok_r(NULL, ",", &saveptr);
295 char *prefstr = strtok_r(NULL, ",", &saveptr);
296 char *validstr = (!prefstr) ? NULL : strtok_r(NULL, ",", &saveptr);
298 uint32_t pref = (!prefstr) ? 0 : strtoul(prefstr, NULL, 10);
299 uint32_t valid = (!validstr) ? 0 : strtoul(validstr, NULL, 10);
301 uint8_t length = strtoul(lengthstr, NULL, 10);
302 if (length < 1 || length > 64)
305 struct in6_addr addr;
306 if (inet_pton(AF_INET6, addrstr, &addr) < 1)
309 time_t now = system_get_rtime();
310 time_t preferred_until = 0;
311 if (prefstr && pref != 0xffffffffU)
312 preferred_until = pref + now;
314 time_t valid_until = 0;
315 if (validstr && valid != 0xffffffffU)
316 valid_until = valid + now;
318 interface_ip_add_device_prefix(iface, &addr, length,
319 valid_until, preferred_until);
324 parse_prefix_list(struct interface *iface, struct blob_attr *attr)
326 struct blob_attr *cur;
330 blobmsg_for_each_attr(cur, attr, rem) {
331 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
335 if (!parse_prefix_option(iface, blobmsg_data(cur),
336 blobmsg_data_len(cur)))
344 proto_apply_static_ip_settings(struct interface *iface, struct blob_attr *attr)
346 struct blob_attr *tb[__OPT_MAX];
347 struct blob_attr *cur;
349 unsigned int netmask = 32;
350 int n_v4 = 0, n_v6 = 0;
351 struct in_addr bcast = {};
353 blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
355 if ((cur = tb[OPT_NETMASK])) {
356 netmask = parse_netmask_string(blobmsg_data(cur), false);
358 error = "INVALID_NETMASK";
363 if ((cur = tb[OPT_BROADCAST])) {
364 if (!inet_pton(AF_INET, blobmsg_data(cur), &bcast)) {
365 error = "INVALID_BROADCAST";
370 if ((cur = tb[OPT_IPADDR]))
371 n_v4 = parse_static_address_option(iface, cur, false,
372 netmask, false, bcast.s_addr);
374 if ((cur = tb[OPT_IP6ADDR]))
375 n_v6 = parse_static_address_option(iface, cur, true,
378 if ((cur = tb[OPT_IP6PREFIX]))
379 if (parse_prefix_list(iface, cur) < 0)
382 if (n_v4 < 0 || n_v6 < 0)
385 if ((cur = tb[OPT_GATEWAY])) {
386 if (n_v4 && !parse_gateway_option(iface, cur, false))
390 if ((cur = tb[OPT_IP6GW])) {
391 if (n_v6 && !parse_gateway_option(iface, cur, true))
395 if ((cur = tb[OPT_IP6ASSIGN]))
396 if (!parse_ip6assign_option(iface, cur))
402 interface_add_error(iface, "proto", error, NULL, 0);
408 proto_apply_ip_settings(struct interface *iface, struct blob_attr *attr, bool ext)
410 struct blob_attr *tb[__OPT_MAX];
411 struct blob_attr *cur;
412 int n_v4 = 0, n_v6 = 0;
414 blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
416 if ((cur = tb[OPT_IPADDR]))
417 n_v4 = parse_address_list(iface, cur, false, ext);
419 if ((cur = tb[OPT_IP6ADDR]))
420 n_v6 = parse_address_list(iface, cur, true, ext);
422 if ((cur = tb[OPT_IP6PREFIX]))
423 if (parse_prefix_list(iface, cur) < 0)
426 if (n_v4 < 0 || n_v6 < 0)
429 if ((cur = tb[OPT_GATEWAY])) {
430 if (n_v4 && !parse_gateway_option(iface, cur, false))
434 if ((cur = tb[OPT_IP6GW])) {
435 if (n_v6 && !parse_gateway_option(iface, cur, true))
439 if ((cur = tb[OPT_IP6ASSIGN]))
440 if (!parse_ip6assign_option(iface, cur))
449 void add_proto_handler(struct proto_handler *p)
452 avl_init(&handlers, avl_strcmp, false, NULL);
457 p->avl.key = p->name;
458 avl_insert(&handlers, &p->avl);
462 default_proto_free(struct interface_proto_state *proto)
468 invalid_proto_handler(struct interface_proto_state *proto,
469 enum interface_proto_cmd cmd, bool force)
475 no_proto_handler(struct interface_proto_state *proto,
476 enum interface_proto_cmd cmd, bool force)
481 static struct interface_proto_state *
482 default_proto_attach(const struct proto_handler *h,
483 struct interface *iface, struct blob_attr *attr)
485 struct interface_proto_state *proto;
487 proto = calloc(1, sizeof(*proto));
488 proto->free = default_proto_free;
489 proto->cb = no_proto_handler;
494 static const struct proto_handler no_proto = {
496 .flags = PROTO_FLAG_IMMEDIATE,
497 .attach = default_proto_attach,
500 static const struct proto_handler *
501 get_proto_handler(const char *name)
503 struct proto_handler *proto;
505 if (!strcmp(name, "none"))
511 return avl_find_element(&handlers, name, proto, avl);
515 proto_dump_handlers(struct blob_buf *b)
517 struct proto_handler *p;
520 avl_for_each_element(&handlers, p, avl) {
521 c = blobmsg_open_table(b, p->name);
522 blobmsg_add_u8(b, "no_device", !!(p->flags & PROTO_FLAG_NODEV));
523 blobmsg_close_table(b, c);
528 proto_init_interface(struct interface *iface, struct blob_attr *attr)
530 const struct proto_handler *proto = iface->proto_handler;
531 struct interface_proto_state *state = NULL;
536 state = proto->attach(proto, iface, attr);
538 state = no_proto.attach(&no_proto, iface, attr);
539 state->cb = invalid_proto_handler;
542 state->handler = proto;
543 interface_set_proto_state(iface, state);
547 proto_attach_interface(struct interface *iface, const char *proto_name)
549 const struct proto_handler *proto = &no_proto;
552 proto = get_proto_handler(proto_name);
554 interface_add_error(iface, "proto", "INVALID_PROTO", NULL, 0);
559 iface->proto_handler = proto;
563 interface_proto_event(struct interface_proto_state *proto,
564 enum interface_proto_cmd cmd, bool force)
566 enum interface_proto_event ev;
569 ret = proto->cb(proto, cmd, force);
570 if (ret || !(proto->handler->flags & PROTO_FLAG_IMMEDIATE))
574 case PROTO_CMD_SETUP:
577 case PROTO_CMD_TEARDOWN:
583 proto->proto_event(proto, ev);