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
44 #define RELAYD_MAX_PREFIXES 8
45 #define RELAYD_MAX_ADDRS 8
47 #define INFINITE_VALID(x) ((x) == 0)
49 #define _unused __attribute__((unused))
50 #define _packed __attribute__((packed))
53 #define ALL_IPV6_NODES {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
54 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}}}
56 #define ALL_IPV6_ROUTERS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
57 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}}}
59 #define IN6_IS_ADDR_ULA(a) (((a)->s6_addr32[0] & htonl(0xfe000000)) == htonl(0xfc000000))
63 extern struct list_head leases;
66 struct uloop_fd uloop;
67 void (*handle_dgram)(void *addr, void *data, size_t len,
68 struct interface *iface, void *dest_addr);
69 void (*handle_error)(struct odhcpd_event *e, int error);
70 void (*recv_msgs)(struct odhcpd_event *e);
74 struct odhcpd_ipaddr {
90 enum odhcpd_assignment_flags {
92 OAF_STATIC = (1 << 1),
105 struct list_head head;
106 struct in_addr ipaddr;
108 struct ether_addr mac;
111 uint32_t dhcpv4_leasetime;
117 struct list_head head;
124 struct uloop_timeout timer_rs;
125 struct list_head ia_assignments;
126 struct odhcpd_ipaddr ia_addr[RELAYD_MAX_ADDRS];
130 struct odhcpd_event dhcpv6_event;
131 struct odhcpd_event dhcpv4_event;
132 struct odhcpd_event ndp_event;
133 struct list_head dhcpv4_assignments;
136 char dhcpv6_pd_manager[128];
137 struct in6_addr dhcpv6_pd_cer;
141 enum odhcpd_mode dhcpv6;
142 enum odhcpd_mode ndp;
143 enum odhcpd_mode dhcpv4;
150 bool always_rewrite_dns;
153 bool ra_useleasetime;
154 bool no_dynamic_dhcp;
160 int route_preference;
164 uint32_t ra_reachabletime;
165 uint32_t ra_retranstime;
166 uint32_t ra_hoplimit;
170 struct in_addr dhcpv4_start;
171 struct in_addr dhcpv4_end;
172 struct in_addr *dhcpv4_router;
173 size_t dhcpv4_router_cnt;
174 struct in_addr *dhcpv4_dns;
175 size_t dhcpv4_dns_cnt;
176 uint32_t dhcpv4_leasetime;
179 struct in6_addr *dns;
185 size_t dhcpv6_raw_len;
193 extern struct list_head interfaces;
195 #define RELAYD_MANAGED_MFLAG 1
196 #define RELAYD_MANAGED_NO_AFLAG 2
199 // Exported main functions
200 int odhcpd_register(struct odhcpd_event *event);
201 int odhcpd_deregister(struct odhcpd_event *event);
202 void odhcpd_process(struct odhcpd_event *event);
204 struct nl_sock *odhcpd_create_nl_socket(int protocol);
205 ssize_t odhcpd_send(int socket, struct sockaddr_in6 *dest,
206 struct iovec *iov, size_t iov_len,
207 const struct interface *iface);
208 ssize_t odhcpd_get_interface_addresses(int ifindex,
209 struct odhcpd_ipaddr *addrs, size_t cnt);
210 int odhcpd_get_interface_dns_addr(const struct interface *iface,
211 struct in6_addr *addr);
212 struct interface* odhcpd_get_interface_by_name(const char *name);
213 int odhcpd_get_interface_config(const char *ifname, const char *what);
214 int odhcpd_get_mac(const struct interface *iface, uint8_t mac[6]);
215 struct interface* odhcpd_get_interface_by_index(int ifindex);
216 struct interface* odhcpd_get_master_interface(void);
217 int odhcpd_urandom(void *data, size_t len);
218 int odhcpd_setup_route(const struct in6_addr *addr, const int prefixlen,
219 const struct interface *iface, const struct in6_addr *gw,
220 const uint32_t metric, const bool add);
221 int odhcpd_setup_proxy_neigh(const struct in6_addr *addr,
222 const struct interface *iface, const bool add);
224 void odhcpd_run(void);
225 time_t odhcpd_time(void);
226 ssize_t odhcpd_unhexlify(uint8_t *dst, size_t len, const char *src);
227 void odhcpd_hexlify(char *dst, const uint8_t *src, size_t len);
229 int odhcpd_bmemcmp(const void *av, const void *bv, size_t bits);
230 void odhcpd_bmemcpy(void *av, const void *bv, size_t bits);
232 int config_parse_interface(void *data, size_t len, const char *iname, bool overwrite);
234 void ndp_handle_addr6_dump(void);
235 void ndp_rqs_addr6_dump(void);
239 const char* ubus_get_ifname(const char *name);
240 void ubus_apply_network(void);
241 bool ubus_has_prefix(const char *name, const char *ifname);
245 // Exported module initializers
246 int init_router(void);
247 int init_dhcpv6(void);
248 int init_dhcpv4(void);
251 int setup_router_interface(struct interface *iface, bool enable);
252 int setup_dhcpv6_interface(struct interface *iface, bool enable);
253 int setup_ndp_interface(struct interface *iface, bool enable);
254 int setup_dhcpv4_interface(struct interface *iface, bool enable);
256 void odhcpd_reload(void);