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
46 #define RELAYD_MAX_ADDRS 8
48 #define INFINITE_VALID(x) ((x) == 0)
50 #define _unused __attribute__((unused))
51 #define _packed __attribute__((packed))
54 #define ALL_IPV6_NODES {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
55 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}}}
57 #define ALL_IPV6_ROUTERS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
58 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}}}
60 #define IN6_IS_ADDR_ULA(a) (((a)->s6_addr32[0] & htonl(0xfe000000)) == htonl(0xfc000000))
64 extern struct list_head leases;
67 struct uloop_fd uloop;
68 void (*handle_dgram)(void *addr, void *data, size_t len,
69 struct interface *iface, void *dest_addr);
70 void (*handle_error)(struct odhcpd_event *e, int error);
71 void (*recv_msgs)(struct odhcpd_event *e);
75 struct odhcpd_ipaddr {
91 enum odhcpd_assignment_flags {
93 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;
120 char ifname[IF_NAMESIZE];
121 char name[IF_NAMESIZE];
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 no_dynamic_dhcp;
158 int route_preference;
162 struct in_addr dhcpv4_start;
163 struct in_addr dhcpv4_end;
164 struct in_addr *dhcpv4_router;
165 size_t dhcpv4_router_cnt;
166 struct in_addr *dhcpv4_dns;
167 size_t dhcpv4_dns_cnt;
168 uint32_t dhcpv4_leasetime;
171 struct in6_addr *dns;
177 size_t dhcpv6_raw_len;
185 extern struct list_head interfaces;
187 #define RELAYD_MANAGED_MFLAG 1
188 #define RELAYD_MANAGED_NO_AFLAG 2
191 // Exported main functions
192 int odhcpd_register(struct odhcpd_event *event);
193 int odhcpd_deregister(struct odhcpd_event *event);
194 void odhcpd_process(struct odhcpd_event *event);
196 struct nl_sock *odhcpd_create_nl_socket(int protocol);
197 ssize_t odhcpd_send(int socket, struct sockaddr_in6 *dest,
198 struct iovec *iov, size_t iov_len,
199 const struct interface *iface);
200 ssize_t odhcpd_get_interface_addresses(int ifindex,
201 struct odhcpd_ipaddr *addrs, size_t cnt);
202 int odhcpd_get_linklocal_interface_address(int ifindex, struct in6_addr *lladdr);
203 struct interface* odhcpd_get_interface_by_name(const char *name);
204 int odhcpd_get_interface_config(const char *ifname, const char *what);
205 int odhcpd_get_mac(const struct interface *iface, uint8_t mac[6]);
206 struct interface* odhcpd_get_interface_by_index(int ifindex);
207 struct interface* odhcpd_get_master_interface(void);
208 int odhcpd_urandom(void *data, size_t len);
209 int odhcpd_setup_route(const struct in6_addr *addr, const int prefixlen,
210 const struct interface *iface, const struct in6_addr *gw,
211 const uint32_t metric, const bool add);
212 int odhcpd_setup_proxy_neigh(const struct in6_addr *addr,
213 const struct interface *iface, const bool add);
215 void odhcpd_run(void);
216 time_t odhcpd_time(void);
217 ssize_t odhcpd_unhexlify(uint8_t *dst, size_t len, const char *src);
218 void odhcpd_hexlify(char *dst, const uint8_t *src, size_t len);
220 int odhcpd_bmemcmp(const void *av, const void *bv, size_t bits);
221 void odhcpd_bmemcpy(void *av, const void *bv, size_t bits);
223 int config_parse_interface(void *data, size_t len, const char *iname, bool overwrite);
227 const char* ubus_get_ifname(const char *name);
228 void ubus_apply_network(void);
229 bool ubus_has_prefix(const char *name, const char *ifname);
233 // Exported module initializers
234 int init_router(void);
235 int init_dhcpv6(void);
236 int init_dhcpv4(void);
239 int setup_router_interface(struct interface *iface, bool enable);
240 int setup_dhcpv6_interface(struct interface *iface, bool enable);
241 int setup_ndp_interface(struct interface *iface, bool enable);
242 int setup_dhcpv4_interface(struct interface *iface, bool enable);
244 void odhcpd_reload(void);