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))
48 #define ALL_IPV6_NODES "ff02::1"
49 #define ALL_IPV6_ROUTERS "ff02::2"
51 #define IN6_IS_ADDR_ULA(a) (((a)->s6_addr32[0] & htonl(0xfe000000)) == htonl(0xfc000000))
55 extern struct list_head leases;
58 struct uloop_fd uloop;
59 void (*handle_dgram)(void *addr, void *data, size_t len,
60 struct interface *iface, void *dest_addr);
61 void (*handle_error)(struct odhcpd_event *e, int error);
62 void (*recv_msgs)(struct odhcpd_event *e);
70 struct netevent_handler_info {
71 struct interface *iface;
76 union if_addr gateway;
84 struct odhcpd_ipaddr *addrs;
95 NETEV_ADDRLIST_CHANGE,
98 NETEV_ADDR6LIST_CHANGE,
105 struct netevent_handler {
106 struct list_head head;
107 void (*cb) (unsigned long event, struct netevent_handler_info *info);
110 struct odhcpd_ipaddr {
120 struct in_addr broadcast;
131 enum odhcpd_assignment_flags {
132 OAF_TENTATIVE = (1 << 0),
133 OAF_BOUND = (1 << 1),
134 OAF_STATIC = (1 << 2),
135 OAF_BROKEN_HOSTNAME = (1 << 3),
142 char *dhcp_statefile;
148 struct list_head head;
149 struct in_addr ipaddr;
151 struct ether_addr mac;
154 uint32_t dhcpv4_leasetime;
160 struct list_head head;
167 struct odhcpd_ipaddr *addr6;
171 struct uloop_timeout timer_rs;
173 // DHCPv6 runtime data
174 struct odhcpd_event dhcpv6_event;
175 struct list_head ia_assignments;
178 struct odhcpd_event ndp_event;
181 struct odhcpd_ipaddr *addr4;
184 // DHCPv4 runtime data
185 struct odhcpd_event dhcpv4_event;
186 struct list_head dhcpv4_assignments;
187 struct list_head dhcpv4_fr_ips;
190 char dhcpv6_pd_manager[128];
191 struct in6_addr dhcpv6_pd_cer;
195 enum odhcpd_mode dhcpv6;
196 enum odhcpd_mode ndp;
197 enum odhcpd_mode dhcpv4;
204 bool always_rewrite_dns;
207 bool ra_useleasetime;
208 bool no_dynamic_dhcp;
209 uint8_t pio_filter_length;
210 struct in6_addr pio_filter_addr;
216 int route_preference;
220 uint32_t ra_reachabletime;
221 uint32_t ra_retranstime;
222 uint32_t ra_hoplimit;
226 struct in_addr dhcpv4_start;
227 struct in_addr dhcpv4_end;
228 struct in_addr dhcpv4_start_ip;
229 struct in_addr dhcpv4_end_ip;
230 struct in_addr dhcpv4_local;
231 struct in_addr dhcpv4_bcast;
232 struct in_addr dhcpv4_mask;
233 struct in_addr *dhcpv4_router;
234 size_t dhcpv4_router_cnt;
235 struct in_addr *dhcpv4_dns;
236 size_t dhcpv4_dns_cnt;
237 uint32_t dhcpv4_leasetime;
238 bool dhcpv4_forcereconf;
241 struct in6_addr *dns;
248 size_t dhcpv6_raw_len;
249 bool dhcpv6_assignall;
257 extern struct list_head interfaces;
259 #define RA_MANAGED_NO_MFLAG 0
260 #define RA_MANAGED_MFLAG 1
261 #define RA_MANAGED_NO_AFLAG 2
264 // Exported main functions
265 int odhcpd_register(struct odhcpd_event *event);
266 int odhcpd_deregister(struct odhcpd_event *event);
267 void odhcpd_process(struct odhcpd_event *event);
269 ssize_t odhcpd_send(int socket, struct sockaddr_in6 *dest,
270 struct iovec *iov, size_t iov_len,
271 const struct interface *iface);
272 int odhcpd_get_interface_dns_addr(const struct interface *iface,
273 struct in6_addr *addr);
274 struct interface* odhcpd_get_interface_by_name(const char *name);
275 int odhcpd_get_interface_config(const char *ifname, const char *what);
276 int odhcpd_get_mac(const struct interface *iface, uint8_t mac[6]);
277 struct interface* odhcpd_get_interface_by_index(int ifindex);
278 struct interface* odhcpd_get_master_interface(void);
279 int odhcpd_urandom(void *data, size_t len);
281 void odhcpd_run(void);
282 time_t odhcpd_time(void);
283 ssize_t odhcpd_unhexlify(uint8_t *dst, size_t len, const char *src);
284 void odhcpd_hexlify(char *dst, const uint8_t *src, size_t len);
285 const char *odhcpd_print_mac(const uint8_t *mac, const size_t len);
287 int odhcpd_bmemcmp(const void *av, const void *bv, size_t bits);
288 void odhcpd_bmemcpy(void *av, const void *bv, size_t bits);
290 int odhcpd_netmask2bitlen(bool v6, void *mask);
291 bool odhcpd_bitlen2netmask(bool v6, unsigned int bits, void *mask);
292 bool odhcpd_valid_hostname(const char *name);
294 int config_parse_interface(void *data, size_t len, const char *iname, bool overwrite);
298 const char* ubus_get_ifname(const char *name);
299 void ubus_apply_network(void);
300 bool ubus_has_prefix(const char *name, const char *ifname);
301 void ubus_bcast_dhcp_event(const char *type, const uint8_t *mac, const size_t mac_len,
302 const struct in_addr *addr, const char *name, const char *interface);
305 int netlink_add_netevent_handler(struct netevent_handler *hdlr);
306 ssize_t netlink_get_interface_addrs(const int ifindex, bool v6,
307 struct odhcpd_ipaddr **addrs);
308 int netlink_setup_route(const struct in6_addr *addr, const int prefixlen,
309 const int ifindex, const struct in6_addr *gw,
310 const uint32_t metric, const bool add);
311 int netlink_setup_proxy_neigh(const struct in6_addr *addr,
312 const int ifindex, const bool add);
313 int netlink_setup_addr(struct odhcpd_ipaddr *addr,
314 const int ifindex, const bool v6, const bool add);
315 void netlink_dump_neigh_table(const bool proxy);
316 void netlink_dump_addr_table(const bool v6);
318 // Exported module initializers
319 int netlink_init(void);
320 int router_init(void);
321 int dhcpv6_init(void);
323 #ifdef DHCPV4_SUPPORT
324 int dhcpv4_init(void);
326 int dhcpv4_setup_interface(struct interface *iface, bool enable);
328 int router_setup_interface(struct interface *iface, bool enable);
329 int dhcpv6_setup_interface(struct interface *iface, bool enable);
330 int ndp_setup_interface(struct interface *iface, bool enable);
332 void odhcpd_reload(void);