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>
23 #include "libubox/blobmsg.h"
26 #define typeof __typeof
30 #define container_of(ptr, type, member) ( \
31 (type *)( (char *)ptr - offsetof(type,member) ))
34 #include "libubox/list.h"
35 #include "libubox/uloop.h"
37 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
39 // RFC 6106 defines this router advertisement option
40 #define ND_OPT_ROUTE_INFO 24
41 #define ND_OPT_RECURSIVE_DNS 25
42 #define ND_OPT_DNS_SEARCH 31
44 #define RELAYD_BUFFER_SIZE 8192
45 #define RELAYD_MAX_PREFIXES 8
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}}}
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);
68 struct odhcpd_ipaddr {
92 struct list_head head;
93 struct in_addr ipaddr;
95 struct ether_addr mac;
103 struct list_head head;
106 char ifname[IF_NAMESIZE];
107 char name[IF_NAMESIZE];
110 struct uloop_timeout timer_rs;
111 struct list_head ia_assignments;
112 struct odhcpd_ipaddr ia_addr[8];
117 struct odhcpd_event dhcpv6_event;
118 struct odhcpd_event dhcpv4_event;
119 struct odhcpd_event ndp_event;
120 struct list_head dhcpv4_assignments;
123 char dhcpv6_pd_manager[128];
124 struct in6_addr dhcpv6_pd_cer;
128 enum odhcpd_mode dhcpv6;
129 enum odhcpd_mode ndp;
130 enum odhcpd_mode dhcpv4;
137 bool always_rewrite_dns;
140 bool no_dynamic_dhcp;
145 int route_preference;
148 struct in_addr dhcpv4_start;
149 struct in_addr dhcpv4_end;
150 struct in_addr *dhcpv4_router;
151 size_t dhcpv4_router_cnt;
152 struct in_addr *dhcpv4_dns;
153 size_t dhcpv4_dns_cnt;
154 uint32_t dhcpv4_leasetime;
157 struct in6_addr *dns;
163 size_t dhcpv6_raw_len;
171 extern struct list_head interfaces;
173 #define RELAYD_MANAGED_MFLAG 1
174 #define RELAYD_MANAGED_NO_AFLAG 2
177 // Exported main functions
178 int odhcpd_open_rtnl(void);
179 int odhcpd_register(struct odhcpd_event *event);
180 void odhcpd_process(struct odhcpd_event *event);
182 ssize_t odhcpd_send(int socket, struct sockaddr_in6 *dest,
183 struct iovec *iov, size_t iov_len,
184 const struct interface *iface);
185 ssize_t odhcpd_get_interface_addresses(int ifindex,
186 struct odhcpd_ipaddr *addrs, size_t cnt);
187 int odhcpd_get_preferred_interface_address(int ifindex, struct in6_addr *addr);
188 struct interface* odhcpd_get_interface_by_name(const char *name);
189 int odhcpd_get_interface_mtu(const char *ifname);
190 int odhcpd_get_mac(const struct interface *iface, uint8_t mac[6]);
191 struct interface* odhcpd_get_interface_by_index(int ifindex);
192 struct interface* odhcpd_get_master_interface(void);
193 void odhcpd_urandom(void *data, size_t len);
194 void odhcpd_setup_route(const struct in6_addr *addr, int prefixlen,
195 const struct interface *iface, const struct in6_addr *gw, bool add);
197 void odhcpd_run(void);
198 time_t odhcpd_time(void);
199 ssize_t odhcpd_unhexlify(uint8_t *dst, size_t len, const char *src);
200 void odhcpd_hexlify(char *dst, const uint8_t *src, size_t len);
202 int odhcpd_bmemcmp(const void *av, const void *bv, size_t bits);
203 void odhcpd_bmemcpy(void *av, const void *bv, size_t bits);
205 int config_parse_interface(void *data, size_t len, const char *iname, bool overwrite);
208 // Exported module initializers
209 int init_router(void);
210 int init_dhcpv6(void);
211 int init_dhcpv4(void);
214 int setup_router_interface(struct interface *iface, bool enable);
215 int setup_dhcpv6_interface(struct interface *iface, bool enable);
216 int setup_ndp_interface(struct interface *iface, bool enable);
217 int setup_dhcpv4_interface(struct interface *iface, bool enable);
219 void odhcpd_reload(void);