2 * Copyright (C) 2012-2013 Steven Barth <steven@midlink.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License v2 as published by
6 * the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
16 #include <netinet/in.h>
17 #include <netinet/icmp6.h>
18 #include <netinet/ether.h>
22 #include <libubox/blobmsg.h>
23 #include <libubox/list.h>
24 #include <libubox/uloop.h>
25 #include <libubox/avl.h>
27 // RFC 6106 defines this router advertisement option
28 #define ND_OPT_ROUTE_INFO 24
29 #define ND_OPT_RECURSIVE_DNS 25
30 #define ND_OPT_DNS_SEARCH 31
32 #define INFINITE_VALID(x) ((x) == 0)
34 #define _unused __attribute__((unused))
35 #define _packed __attribute__((packed))
37 #define ALL_IPV6_NODES "ff02::1"
38 #define ALL_IPV6_ROUTERS "ff02::2"
40 #define IN6_IS_ADDR_ULA(a) (((a)->s6_addr32[0] & htonl(0xfe000000)) == htonl(0xfc000000))
44 extern struct list_head leases;
47 struct uloop_fd uloop;
48 void (*handle_dgram)(void *addr, void *data, size_t len,
49 struct interface *iface, void *dest_addr);
50 void (*handle_error)(struct odhcpd_event *e, int error);
51 void (*recv_msgs)(struct odhcpd_event *e);
59 struct netevent_handler_info {
60 struct interface *iface;
65 union if_addr gateway;
73 struct odhcpd_ipaddr *addrs;
84 NETEV_ADDRLIST_CHANGE,
87 NETEV_ADDR6LIST_CHANGE,
94 struct netevent_handler {
95 struct list_head head;
96 void (*cb) (unsigned long event, struct netevent_handler_info *info);
99 struct odhcpd_ipaddr {
109 struct in_addr broadcast;
120 enum odhcpd_assignment_flags {
121 OAF_TENTATIVE = (1 << 0),
122 OAF_BOUND = (1 << 1),
123 OAF_STATIC = (1 << 2),
124 OAF_BROKEN_HOSTNAME = (1 << 3),
131 char *dhcp_statefile;
137 struct list_head head;
138 struct in_addr ipaddr;
140 struct ether_addr mac;
143 uint32_t dhcpv4_leasetime;
156 struct odhcpd_ipaddr *addr6;
160 struct uloop_timeout timer_rs;
162 // DHCPv6 runtime data
163 struct odhcpd_event dhcpv6_event;
164 struct list_head ia_assignments;
167 struct odhcpd_event ndp_event;
170 struct odhcpd_ipaddr *addr4;
173 // DHCPv4 runtime data
174 struct odhcpd_event dhcpv4_event;
175 struct list_head dhcpv4_assignments;
176 struct list_head dhcpv4_fr_ips;
179 char dhcpv6_pd_manager[128];
180 struct in6_addr dhcpv6_pd_cer;
184 enum odhcpd_mode dhcpv6;
185 enum odhcpd_mode ndp;
186 enum odhcpd_mode dhcpv4;
193 bool always_rewrite_dns;
196 bool ra_useleasetime;
198 bool no_dynamic_dhcp;
199 uint8_t pio_filter_length;
200 struct in6_addr pio_filter_addr;
206 int route_preference;
210 uint32_t ra_reachabletime;
211 uint32_t ra_retranstime;
212 uint32_t ra_hoplimit;
216 struct in_addr dhcpv4_start;
217 struct in_addr dhcpv4_end;
218 struct in_addr dhcpv4_start_ip;
219 struct in_addr dhcpv4_end_ip;
220 struct in_addr dhcpv4_local;
221 struct in_addr dhcpv4_bcast;
222 struct in_addr dhcpv4_mask;
223 struct in_addr *dhcpv4_router;
224 size_t dhcpv4_router_cnt;
225 struct in_addr *dhcpv4_dns;
226 size_t dhcpv4_dns_cnt;
227 uint32_t dhcpv4_leasetime;
228 bool dhcpv4_forcereconf;
231 struct in6_addr *dns;
238 size_t dhcpv6_raw_len;
239 bool dhcpv6_assignall;
249 extern struct avl_tree interfaces;
251 #define RA_MANAGED_NO_MFLAG 0
252 #define RA_MANAGED_MFLAG 1
253 #define RA_MANAGED_NO_AFLAG 2
256 // Exported main functions
257 int odhcpd_register(struct odhcpd_event *event);
258 int odhcpd_deregister(struct odhcpd_event *event);
259 void odhcpd_process(struct odhcpd_event *event);
261 ssize_t odhcpd_send(int socket, struct sockaddr_in6 *dest,
262 struct iovec *iov, size_t iov_len,
263 const struct interface *iface);
264 int odhcpd_get_interface_dns_addr(const struct interface *iface,
265 struct in6_addr *addr);
266 int odhcpd_get_interface_config(const char *ifname, const char *what);
267 int odhcpd_get_mac(const struct interface *iface, uint8_t mac[6]);
268 struct interface* odhcpd_get_interface_by_index(int ifindex);
269 struct interface* odhcpd_get_master_interface(void);
270 int odhcpd_urandom(void *data, size_t len);
272 void odhcpd_run(void);
273 time_t odhcpd_time(void);
274 ssize_t odhcpd_unhexlify(uint8_t *dst, size_t len, const char *src);
275 void odhcpd_hexlify(char *dst, const uint8_t *src, size_t len);
276 const char *odhcpd_print_mac(const uint8_t *mac, const size_t len);
278 int odhcpd_bmemcmp(const void *av, const void *bv, size_t bits);
279 void odhcpd_bmemcpy(void *av, const void *bv, size_t bits);
281 int odhcpd_netmask2bitlen(bool v6, void *mask);
282 bool odhcpd_bitlen2netmask(bool v6, unsigned int bits, void *mask);
283 bool odhcpd_valid_hostname(const char *name);
285 int config_parse_interface(void *data, size_t len, const char *iname, bool overwrite);
289 const char* ubus_get_ifname(const char *name);
290 void ubus_apply_network(void);
291 bool ubus_has_prefix(const char *name, const char *ifname);
292 void ubus_bcast_dhcp_event(const char *type, const uint8_t *mac, const size_t mac_len,
293 const struct in_addr *addr, const char *name, const char *interface);
296 int netlink_add_netevent_handler(struct netevent_handler *hdlr);
297 ssize_t netlink_get_interface_addrs(const int ifindex, bool v6,
298 struct odhcpd_ipaddr **addrs);
299 int netlink_setup_route(const struct in6_addr *addr, const int prefixlen,
300 const int ifindex, const struct in6_addr *gw,
301 const uint32_t metric, const bool add);
302 int netlink_setup_proxy_neigh(const struct in6_addr *addr,
303 const int ifindex, const bool add);
304 int netlink_setup_addr(struct odhcpd_ipaddr *addr,
305 const int ifindex, const bool v6, const bool add);
306 void netlink_dump_neigh_table(const bool proxy);
307 void netlink_dump_addr_table(const bool v6);
309 // Exported module initializers
310 int netlink_init(void);
311 int router_init(void);
312 int dhcpv6_init(void);
314 #ifdef DHCPV4_SUPPORT
315 int dhcpv4_init(void);
317 int dhcpv4_setup_interface(struct interface *iface, bool enable);
319 int router_setup_interface(struct interface *iface, bool enable);
320 int dhcpv6_setup_interface(struct interface *iface, bool enable);
321 int ndp_setup_interface(struct interface *iface, bool enable);
323 void odhcpd_reload(void);