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);