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 odhcpd_ipaddr {
84 struct in_addr broadcast;
95 enum odhcpd_assignment_flags {
97 OAF_STATIC = (1 << 1),
104 char *dhcp_statefile;
110 struct list_head head;
111 struct in_addr ipaddr;
113 struct ether_addr mac;
116 uint32_t dhcpv4_leasetime;
122 struct list_head head;
129 struct odhcpd_ipaddr *ia_addr;
133 struct uloop_timeout timer_rs;
135 // DHCPv6 runtime data
136 struct odhcpd_event dhcpv6_event;
137 struct list_head ia_assignments;
140 struct odhcpd_event ndp_event;
143 struct odhcpd_ipaddr *addr4;
146 // DHCPv4 runtime data
147 struct odhcpd_event dhcpv4_event;
148 struct list_head dhcpv4_assignments;
149 struct list_head dhcpv4_fr_ips;
152 char dhcpv6_pd_manager[128];
153 struct in6_addr dhcpv6_pd_cer;
157 enum odhcpd_mode dhcpv6;
158 enum odhcpd_mode ndp;
159 enum odhcpd_mode dhcpv4;
166 bool always_rewrite_dns;
169 bool ra_useleasetime;
170 bool no_dynamic_dhcp;
176 int route_preference;
180 uint32_t ra_reachabletime;
181 uint32_t ra_retranstime;
182 uint32_t ra_hoplimit;
186 struct in_addr dhcpv4_start;
187 struct in_addr dhcpv4_end;
188 struct in_addr dhcpv4_start_ip;
189 struct in_addr dhcpv4_end_ip;
190 struct in_addr dhcpv4_local;
191 struct in_addr dhcpv4_bcast;
192 struct in_addr dhcpv4_mask;
193 struct in_addr *dhcpv4_router;
194 size_t dhcpv4_router_cnt;
195 struct in_addr *dhcpv4_dns;
196 size_t dhcpv4_dns_cnt;
197 uint32_t dhcpv4_leasetime;
198 bool dhcpv4_forcereconf;
201 struct in6_addr *dns;
208 size_t dhcpv6_raw_len;
209 bool dhcpv6_assignall;
217 extern struct list_head interfaces;
219 #define RA_MANAGED_NO_MFLAG 0
220 #define RA_MANAGED_MFLAG 1
221 #define RA_MANAGED_NO_AFLAG 2
224 // Exported main functions
225 int odhcpd_register(struct odhcpd_event *event);
226 int odhcpd_deregister(struct odhcpd_event *event);
227 void odhcpd_process(struct odhcpd_event *event);
229 struct nl_sock *odhcpd_create_nl_socket(int protocol);
230 ssize_t odhcpd_send(int socket, struct sockaddr_in6 *dest,
231 struct iovec *iov, size_t iov_len,
232 const struct interface *iface);
233 ssize_t odhcpd_get_interface_addresses(int ifindex, bool v6,
234 struct odhcpd_ipaddr **addrs);
235 int odhcpd_get_interface_dns_addr(const struct interface *iface,
236 struct in6_addr *addr);
237 struct interface* odhcpd_get_interface_by_name(const char *name);
238 int odhcpd_get_interface_config(const char *ifname, const char *what);
239 int odhcpd_get_mac(const struct interface *iface, uint8_t mac[6]);
240 struct interface* odhcpd_get_interface_by_index(int ifindex);
241 struct interface* odhcpd_get_master_interface(void);
242 int odhcpd_urandom(void *data, size_t len);
243 int odhcpd_setup_route(const struct in6_addr *addr, const int prefixlen,
244 const struct interface *iface, const struct in6_addr *gw,
245 const uint32_t metric, const bool add);
246 int odhcpd_setup_proxy_neigh(const struct in6_addr *addr,
247 const struct interface *iface, const bool add);
248 int odhcpd_setup_addr(struct odhcpd_ipaddr *addr,
249 const struct interface *iface, const bool v6,
252 void odhcpd_run(void);
253 time_t odhcpd_time(void);
254 ssize_t odhcpd_unhexlify(uint8_t *dst, size_t len, const char *src);
255 void odhcpd_hexlify(char *dst, const uint8_t *src, size_t len);
257 int odhcpd_bmemcmp(const void *av, const void *bv, size_t bits);
258 void odhcpd_bmemcpy(void *av, const void *bv, size_t bits);
260 int odhcpd_netmask2bitlen(bool v6, void *mask);
261 bool odhcpd_bitlen2netmask(bool v6, unsigned int bits, void *mask);
263 int config_parse_interface(void *data, size_t len, const char *iname, bool overwrite);
265 void dhcpv4_addr_update(struct interface *iface);
269 const char* ubus_get_ifname(const char *name);
270 void ubus_apply_network(void);
271 bool ubus_has_prefix(const char *name, const char *ifname);
275 // Exported module initializers
276 int init_router(void);
277 int init_dhcpv6(void);
278 int init_dhcpv4(void);
281 int setup_router_interface(struct interface *iface, bool enable);
282 int setup_dhcpv6_interface(struct interface *iface, bool enable);
283 int setup_ndp_interface(struct interface *iface, bool enable);
284 int setup_dhcpv4_interface(struct interface *iface, bool enable);
286 void odhcpd_reload(void);