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 RELAYD_BUFFER_SIZE 8192
45 #define INFINITE_VALID(x) ((x) == 0)
47 #define _unused __attribute__((unused))
48 #define _packed __attribute__((packed))
51 #define ALL_IPV6_NODES {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
52 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}}}
54 #define ALL_IPV6_ROUTERS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
55 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}}}
57 #define IN6_IS_ADDR_ULA(a) (((a)->s6_addr32[0] & htonl(0xfe000000)) == htonl(0xfc000000))
61 extern struct list_head leases;
64 struct uloop_fd uloop;
65 void (*handle_dgram)(void *addr, void *data, size_t len,
66 struct interface *iface, void *dest_addr);
67 void (*handle_error)(struct odhcpd_event *e, int error);
68 void (*recv_msgs)(struct odhcpd_event *e);
76 struct odhcpd_ipaddr {
94 enum odhcpd_assignment_flags {
96 OAF_STATIC = (1 << 1),
103 char *dhcp_statefile;
109 struct list_head head;
110 struct in_addr ipaddr;
112 struct ether_addr mac;
115 uint32_t dhcpv4_leasetime;
121 struct list_head head;
128 struct uloop_timeout timer_rs;
129 struct list_head ia_assignments;
130 struct odhcpd_ipaddr *ia_addr;
134 struct odhcpd_event dhcpv6_event;
135 struct odhcpd_event dhcpv4_event;
136 struct odhcpd_event ndp_event;
137 struct list_head dhcpv4_assignments;
140 char dhcpv6_pd_manager[128];
141 struct in6_addr dhcpv6_pd_cer;
145 enum odhcpd_mode dhcpv6;
146 enum odhcpd_mode ndp;
147 enum odhcpd_mode dhcpv4;
154 bool always_rewrite_dns;
157 bool ra_useleasetime;
158 bool no_dynamic_dhcp;
164 int route_preference;
168 uint32_t ra_reachabletime;
169 uint32_t ra_retranstime;
170 uint32_t ra_hoplimit;
174 struct in_addr dhcpv4_start;
175 struct in_addr dhcpv4_end;
176 struct in_addr *dhcpv4_router;
177 size_t dhcpv4_router_cnt;
178 struct in_addr *dhcpv4_dns;
179 size_t dhcpv4_dns_cnt;
180 uint32_t dhcpv4_leasetime;
183 struct in6_addr *dns;
189 size_t dhcpv6_raw_len;
197 extern struct list_head interfaces;
199 #define RA_MANAGED_NO_MFLAG 0
200 #define RA_MANAGED_MFLAG 1
201 #define RA_MANAGED_NO_AFLAG 2
204 // Exported main functions
205 int odhcpd_register(struct odhcpd_event *event);
206 int odhcpd_deregister(struct odhcpd_event *event);
207 void odhcpd_process(struct odhcpd_event *event);
209 struct nl_sock *odhcpd_create_nl_socket(int protocol);
210 ssize_t odhcpd_send(int socket, struct sockaddr_in6 *dest,
211 struct iovec *iov, size_t iov_len,
212 const struct interface *iface);
213 ssize_t odhcpd_get_interface_addresses(int ifindex, bool v6,
214 struct odhcpd_ipaddr **addrs);
215 int odhcpd_get_interface_dns_addr(const struct interface *iface,
216 struct in6_addr *addr);
217 struct interface* odhcpd_get_interface_by_name(const char *name);
218 int odhcpd_get_interface_config(const char *ifname, const char *what);
219 int odhcpd_get_mac(const struct interface *iface, uint8_t mac[6]);
220 struct interface* odhcpd_get_interface_by_index(int ifindex);
221 struct interface* odhcpd_get_master_interface(void);
222 int odhcpd_urandom(void *data, size_t len);
223 int odhcpd_setup_route(const struct in6_addr *addr, const int prefixlen,
224 const struct interface *iface, const struct in6_addr *gw,
225 const uint32_t metric, const bool add);
226 int odhcpd_setup_proxy_neigh(const struct in6_addr *addr,
227 const struct interface *iface, const bool add);
229 void odhcpd_run(void);
230 time_t odhcpd_time(void);
231 ssize_t odhcpd_unhexlify(uint8_t *dst, size_t len, const char *src);
232 void odhcpd_hexlify(char *dst, const uint8_t *src, size_t len);
234 int odhcpd_bmemcmp(const void *av, const void *bv, size_t bits);
235 void odhcpd_bmemcpy(void *av, const void *bv, size_t bits);
237 int config_parse_interface(void *data, size_t len, const char *iname, bool overwrite);
241 const char* ubus_get_ifname(const char *name);
242 void ubus_apply_network(void);
243 bool ubus_has_prefix(const char *name, const char *ifname);
247 // Exported module initializers
248 int init_router(void);
249 int init_dhcpv6(void);
250 int init_dhcpv4(void);
253 int setup_router_interface(struct interface *iface, bool enable);
254 int setup_dhcpv6_interface(struct interface *iface, bool enable);
255 int setup_ndp_interface(struct interface *iface, bool enable);
256 int setup_dhcpv4_interface(struct interface *iface, bool enable);
258 void odhcpd_reload(void);