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>
25 #define typeof __typeof
29 #define container_of(ptr, type, member) ( \
30 (type *)( (char *)ptr - offsetof(type,member) ))
33 #include <libubox/list.h>
34 #include <libubox/uloop.h>
36 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
38 // RFC 6106 defines this router advertisement option
39 #define ND_OPT_ROUTE_INFO 24
40 #define ND_OPT_RECURSIVE_DNS 25
41 #define ND_OPT_DNS_SEARCH 31
43 #define INFINITE_VALID(x) ((x) == 0)
45 #define _unused __attribute__((unused))
46 #define _packed __attribute__((packed))
49 #define ALL_IPV6_NODES {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
50 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}}}
52 #define ALL_IPV6_ROUTERS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
53 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}}}
55 #define IN6_IS_ADDR_ULA(a) (((a)->s6_addr32[0] & htonl(0xfe000000)) == htonl(0xfc000000))
59 extern struct list_head leases;
62 struct uloop_fd uloop;
63 void (*handle_dgram)(void *addr, void *data, size_t len,
64 struct interface *iface, void *dest_addr);
65 void (*handle_error)(struct odhcpd_event *e, int error);
66 void (*recv_msgs)(struct odhcpd_event *e);
74 struct netevent_handler_info {
75 struct interface *iface;
80 union if_addr gateway;
88 struct odhcpd_ipaddr *addrs;
99 NETEV_ADDRLIST_CHANGE,
102 NETEV_ADDR6LIST_CHANGE,
109 struct netevent_handler {
110 struct list_head head;
111 void (*cb) (unsigned long event, struct netevent_handler_info *info);
114 struct odhcpd_ipaddr {
124 struct in_addr broadcast;
135 enum odhcpd_assignment_flags {
136 OAF_TENTATIVE = (1 << 0),
137 OAF_BOUND = (1 << 1),
138 OAF_STATIC = (1 << 2),
145 char *dhcp_statefile;
151 struct list_head head;
152 struct in_addr ipaddr;
154 struct ether_addr mac;
157 uint32_t dhcpv4_leasetime;
163 struct list_head head;
170 struct odhcpd_ipaddr *addr6;
174 struct uloop_timeout timer_rs;
176 // DHCPv6 runtime data
177 struct odhcpd_event dhcpv6_event;
178 struct list_head ia_assignments;
181 struct odhcpd_event ndp_event;
184 struct odhcpd_ipaddr *addr4;
187 // DHCPv4 runtime data
188 struct odhcpd_event dhcpv4_event;
189 struct list_head dhcpv4_assignments;
190 struct list_head dhcpv4_fr_ips;
193 char dhcpv6_pd_manager[128];
194 struct in6_addr dhcpv6_pd_cer;
198 enum odhcpd_mode dhcpv6;
199 enum odhcpd_mode ndp;
200 enum odhcpd_mode dhcpv4;
207 bool always_rewrite_dns;
210 bool ra_useleasetime;
211 bool no_dynamic_dhcp;
212 uint8_t pio_filter_length;
213 struct in6_addr pio_filter_addr;
219 int route_preference;
223 uint32_t ra_reachabletime;
224 uint32_t ra_retranstime;
225 uint32_t ra_hoplimit;
229 struct in_addr dhcpv4_start;
230 struct in_addr dhcpv4_end;
231 struct in_addr dhcpv4_start_ip;
232 struct in_addr dhcpv4_end_ip;
233 struct in_addr dhcpv4_local;
234 struct in_addr dhcpv4_bcast;
235 struct in_addr dhcpv4_mask;
236 struct in_addr *dhcpv4_router;
237 size_t dhcpv4_router_cnt;
238 struct in_addr *dhcpv4_dns;
239 size_t dhcpv4_dns_cnt;
240 uint32_t dhcpv4_leasetime;
241 bool dhcpv4_forcereconf;
244 struct in6_addr *dns;
251 size_t dhcpv6_raw_len;
252 bool dhcpv6_assignall;
260 extern struct list_head interfaces;
262 #define RA_MANAGED_NO_MFLAG 0
263 #define RA_MANAGED_MFLAG 1
264 #define RA_MANAGED_NO_AFLAG 2
267 // Exported main functions
268 int odhcpd_register(struct odhcpd_event *event);
269 int odhcpd_deregister(struct odhcpd_event *event);
270 void odhcpd_process(struct odhcpd_event *event);
272 ssize_t odhcpd_send(int socket, struct sockaddr_in6 *dest,
273 struct iovec *iov, size_t iov_len,
274 const struct interface *iface);
275 int odhcpd_get_interface_dns_addr(const struct interface *iface,
276 struct in6_addr *addr);
277 struct interface* odhcpd_get_interface_by_name(const char *name);
278 int odhcpd_get_interface_config(const char *ifname, const char *what);
279 int odhcpd_get_mac(const struct interface *iface, uint8_t mac[6]);
280 struct interface* odhcpd_get_interface_by_index(int ifindex);
281 struct interface* odhcpd_get_master_interface(void);
282 int odhcpd_urandom(void *data, size_t len);
284 void odhcpd_run(void);
285 time_t odhcpd_time(void);
286 ssize_t odhcpd_unhexlify(uint8_t *dst, size_t len, const char *src);
287 void odhcpd_hexlify(char *dst, const uint8_t *src, size_t len);
288 const char *odhcpd_print_mac(const uint8_t *mac, const size_t len);
290 int odhcpd_bmemcmp(const void *av, const void *bv, size_t bits);
291 void odhcpd_bmemcpy(void *av, const void *bv, size_t bits);
293 int odhcpd_netmask2bitlen(bool v6, void *mask);
294 bool odhcpd_bitlen2netmask(bool v6, unsigned int bits, void *mask);
296 int config_parse_interface(void *data, size_t len, const char *iname, bool overwrite);
300 const char* ubus_get_ifname(const char *name);
301 void ubus_apply_network(void);
302 bool ubus_has_prefix(const char *name, const char *ifname);
303 void ubus_bcast_dhcp_event(const char *type, const uint8_t *mac, const size_t mac_len,
304 const struct in_addr *addr, const char *name, const char *interface);
307 int netlink_add_netevent_handler(struct netevent_handler *hdlr);
308 ssize_t netlink_get_interface_addrs(const int ifindex, bool v6,
309 struct odhcpd_ipaddr **addrs);
310 int netlink_setup_route(const struct in6_addr *addr, const int prefixlen,
311 const int ifindex, const struct in6_addr *gw,
312 const uint32_t metric, const bool add);
313 int netlink_setup_proxy_neigh(const struct in6_addr *addr,
314 const int ifindex, const bool add);
315 int netlink_setup_addr(struct odhcpd_ipaddr *addr,
316 const int ifindex, const bool v6, const bool add);
317 void netlink_dump_neigh_table(const bool proxy);
318 void netlink_dump_addr_table(const bool v6);
320 // Exported module initializers
321 int netlink_init(void);
322 int router_init(void);
323 int dhcpv6_init(void);
325 #ifdef DHCPV4_SUPPORT
326 int dhcpv4_init(void);
328 int dhcpv4_setup_interface(struct interface *iface, bool enable);
330 int router_setup_interface(struct interface *iface, bool enable);
331 int dhcpv6_setup_interface(struct interface *iface, bool enable);
332 int ndp_setup_interface(struct interface *iface, bool enable);
334 void odhcpd_reload(void);