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 netevent_handler_info
{
75 struct interface
*iface
;
80 union if_addr gateway
;
88 struct odhcpd_ipaddr
*addrs
;
99 NETEV_ADDRLIST_CHANGE
,
102 NETEV_ADDR6LIST_CHANGE
,
109 struct netevent_handler
{
110 struct list_head head
;
111 void (*cb
) (unsigned long event
, struct netevent_handler_info
*info
);
114 struct odhcpd_ipaddr
{
124 struct in_addr broadcast
;
135 enum odhcpd_assignment_flags
{
136 OAF_BOUND
= (1 << 0),
137 OAF_STATIC
= (1 << 1),
144 char *dhcp_statefile
;
150 struct list_head head
;
151 struct in_addr ipaddr
;
153 struct ether_addr mac
;
156 uint32_t dhcpv4_leasetime
;
162 struct list_head head
;
169 struct odhcpd_ipaddr
*addr6
;
173 struct uloop_timeout timer_rs
;
175 // DHCPv6 runtime data
176 struct odhcpd_event dhcpv6_event
;
177 struct list_head ia_assignments
;
180 struct odhcpd_event ndp_event
;
183 struct odhcpd_ipaddr
*addr4
;
186 // DHCPv4 runtime data
187 struct odhcpd_event dhcpv4_event
;
188 struct list_head dhcpv4_assignments
;
189 struct list_head dhcpv4_fr_ips
;
192 char dhcpv6_pd_manager
[128];
193 struct in6_addr dhcpv6_pd_cer
;
197 enum odhcpd_mode dhcpv6
;
198 enum odhcpd_mode ndp
;
199 enum odhcpd_mode dhcpv4
;
206 bool always_rewrite_dns
;
209 bool ra_useleasetime
;
210 bool no_dynamic_dhcp
;
216 int route_preference
;
220 uint32_t ra_reachabletime
;
221 uint32_t ra_retranstime
;
222 uint32_t ra_hoplimit
;
226 struct in_addr dhcpv4_start
;
227 struct in_addr dhcpv4_end
;
228 struct in_addr dhcpv4_start_ip
;
229 struct in_addr dhcpv4_end_ip
;
230 struct in_addr dhcpv4_local
;
231 struct in_addr dhcpv4_bcast
;
232 struct in_addr dhcpv4_mask
;
233 struct in_addr
*dhcpv4_router
;
234 size_t dhcpv4_router_cnt
;
235 struct in_addr
*dhcpv4_dns
;
236 size_t dhcpv4_dns_cnt
;
237 uint32_t dhcpv4_leasetime
;
238 bool dhcpv4_forcereconf
;
241 struct in6_addr
*dns
;
248 size_t dhcpv6_raw_len
;
249 bool dhcpv6_assignall
;
257 extern struct list_head interfaces
;
259 #define RA_MANAGED_NO_MFLAG 0
260 #define RA_MANAGED_MFLAG 1
261 #define RA_MANAGED_NO_AFLAG 2
264 // Exported main functions
265 int odhcpd_register(struct odhcpd_event
*event
);
266 int odhcpd_deregister(struct odhcpd_event
*event
);
267 void odhcpd_process(struct odhcpd_event
*event
);
269 ssize_t
odhcpd_send(int socket
, struct sockaddr_in6
*dest
,
270 struct iovec
*iov
, size_t iov_len
,
271 const struct interface
*iface
);
272 int odhcpd_get_interface_dns_addr(const struct interface
*iface
,
273 struct in6_addr
*addr
);
274 struct interface
* odhcpd_get_interface_by_name(const char *name
);
275 int odhcpd_get_interface_config(const char *ifname
, const char *what
);
276 int odhcpd_get_mac(const struct interface
*iface
, uint8_t mac
[6]);
277 struct interface
* odhcpd_get_interface_by_index(int ifindex
);
278 struct interface
* odhcpd_get_master_interface(void);
279 int odhcpd_urandom(void *data
, size_t len
);
281 void odhcpd_run(void);
282 time_t odhcpd_time(void);
283 ssize_t
odhcpd_unhexlify(uint8_t *dst
, size_t len
, const char *src
);
284 void odhcpd_hexlify(char *dst
, const uint8_t *src
, size_t len
);
286 int odhcpd_bmemcmp(const void *av
, const void *bv
, size_t bits
);
287 void odhcpd_bmemcpy(void *av
, const void *bv
, size_t bits
);
289 int odhcpd_netmask2bitlen(bool v6
, void *mask
);
290 bool odhcpd_bitlen2netmask(bool v6
, unsigned int bits
, void *mask
);
292 int config_parse_interface(void *data
, size_t len
, const char *iname
, bool overwrite
);
296 const char* ubus_get_ifname(const char *name
);
297 void ubus_apply_network(void);
298 bool ubus_has_prefix(const char *name
, const char *ifname
);
301 int netlink_add_netevent_handler(struct netevent_handler
*hdlr
);
302 ssize_t
netlink_get_interface_addrs(const int ifindex
, bool v6
,
303 struct odhcpd_ipaddr
**addrs
);
304 int netlink_setup_route(const struct in6_addr
*addr
, const int prefixlen
,
305 const int ifindex
, const struct in6_addr
*gw
,
306 const uint32_t metric
, const bool add
);
307 int netlink_setup_proxy_neigh(const struct in6_addr
*addr
,
308 const int ifindex
, const bool add
);
309 int netlink_setup_addr(struct odhcpd_ipaddr
*addr
,
310 const int ifindex
, const bool v6
, const bool add
);
311 void netlink_dump_neigh_table(const bool proxy
);
312 void netlink_dump_addr_table(const bool v6
);
314 // Exported module initializers
315 int netlink_init(void);
316 int router_init(void);
317 int dhcpv6_init(void);
318 int dhcpv4_init(void);
321 int router_setup_interface(struct interface
*iface
, bool enable
);
322 int dhcpv6_setup_interface(struct interface
*iface
, bool enable
);
323 int ndp_setup_interface(struct interface
*iface
, bool enable
);
324 int dhcpv4_setup_interface(struct interface
*iface
, bool enable
);
326 void odhcpd_reload(void);