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>
23 #include <libubox/list.h>
24 #include <libubox/uloop.h>
25 #include <libubox/avl.h>
27 // RFC 6106 defines this router advertisement option
28 #define ND_OPT_ROUTE_INFO 24
29 #define ND_OPT_RECURSIVE_DNS 25
30 #define ND_OPT_DNS_SEARCH 31
32 #define INFINITE_VALID(x) ((x) == 0)
34 #define _unused __attribute__((unused))
35 #define _packed __attribute__((packed))
37 #define ALL_IPV6_NODES "ff02::1"
38 #define ALL_IPV6_ROUTERS "ff02::2"
40 #define IN6_IS_ADDR_ULA(a) (((a)->s6_addr32[0] & htonl(0xfe000000)) == htonl(0xfc000000))
44 extern struct list_head leases
;
47 struct uloop_fd uloop
;
48 void (*handle_dgram
)(void *addr
, void *data
, size_t len
,
49 struct interface
*iface
, void *dest_addr
);
50 void (*handle_error
)(struct odhcpd_event
*e
, int error
);
51 void (*recv_msgs
)(struct odhcpd_event
*e
);
59 struct netevent_handler_info
{
60 struct interface
*iface
;
65 union if_addr gateway
;
73 struct odhcpd_ipaddr
*addrs
;
84 NETEV_ADDRLIST_CHANGE
,
87 NETEV_ADDR6LIST_CHANGE
,
94 struct netevent_handler
{
95 struct list_head head
;
96 void (*cb
) (unsigned long event
, struct netevent_handler_info
*info
);
99 struct odhcpd_ipaddr
{
109 struct in_addr broadcast
;
120 enum odhcpd_assignment_flags
{
121 OAF_TENTATIVE
= (1 << 0),
122 OAF_BOUND
= (1 << 1),
123 OAF_STATIC
= (1 << 2),
124 OAF_BROKEN_HOSTNAME
= (1 << 3),
131 char *dhcp_statefile
;
137 struct list_head head
;
138 struct in_addr ipaddr
;
140 struct ether_addr mac
;
143 uint32_t dhcpv4_leasetime
;
156 struct odhcpd_ipaddr
*addr6
;
160 struct uloop_timeout timer_rs
;
162 // DHCPv6 runtime data
163 struct odhcpd_event dhcpv6_event
;
164 struct list_head ia_assignments
;
167 struct odhcpd_event ndp_event
;
170 struct odhcpd_ipaddr
*addr4
;
173 // DHCPv4 runtime data
174 struct odhcpd_event dhcpv4_event
;
175 struct list_head dhcpv4_assignments
;
176 struct list_head dhcpv4_fr_ips
;
179 char dhcpv6_pd_manager
[128];
180 struct in6_addr dhcpv6_pd_cer
;
184 enum odhcpd_mode dhcpv6
;
185 enum odhcpd_mode ndp
;
186 enum odhcpd_mode dhcpv4
;
193 bool always_rewrite_dns
;
196 bool ra_useleasetime
;
198 bool no_dynamic_dhcp
;
199 uint8_t pio_filter_length
;
200 struct in6_addr pio_filter_addr
;
206 int route_preference
;
210 uint32_t ra_reachabletime
;
211 uint32_t ra_retranstime
;
212 uint32_t ra_hoplimit
;
216 struct in_addr dhcpv4_start
;
217 struct in_addr dhcpv4_end
;
218 struct in_addr dhcpv4_start_ip
;
219 struct in_addr dhcpv4_end_ip
;
220 struct in_addr dhcpv4_local
;
221 struct in_addr dhcpv4_bcast
;
222 struct in_addr dhcpv4_mask
;
223 struct in_addr
*dhcpv4_router
;
224 size_t dhcpv4_router_cnt
;
225 struct in_addr
*dhcpv4_dns
;
226 size_t dhcpv4_dns_cnt
;
227 uint32_t dhcpv4_leasetime
;
228 bool dhcpv4_forcereconf
;
231 struct in6_addr
*dns
;
238 size_t dhcpv6_raw_len
;
239 bool dhcpv6_assignall
;
249 extern struct avl_tree interfaces
;
251 #define RA_MANAGED_NO_MFLAG 0
252 #define RA_MANAGED_MFLAG 1
253 #define RA_MANAGED_NO_AFLAG 2
256 // Exported main functions
257 int odhcpd_register(struct odhcpd_event
*event
);
258 int odhcpd_deregister(struct odhcpd_event
*event
);
259 void odhcpd_process(struct odhcpd_event
*event
);
261 ssize_t
odhcpd_send(int socket
, struct sockaddr_in6
*dest
,
262 struct iovec
*iov
, size_t iov_len
,
263 const struct interface
*iface
);
264 int odhcpd_get_interface_dns_addr(const struct interface
*iface
,
265 struct in6_addr
*addr
);
266 struct interface
* odhcpd_get_interface_by_name(const char *name
);
267 int odhcpd_get_interface_config(const char *ifname
, const char *what
);
268 int odhcpd_get_mac(const struct interface
*iface
, uint8_t mac
[6]);
269 struct interface
* odhcpd_get_interface_by_index(int ifindex
);
270 struct interface
* odhcpd_get_master_interface(void);
271 int odhcpd_urandom(void *data
, size_t len
);
273 void odhcpd_run(void);
274 time_t odhcpd_time(void);
275 ssize_t
odhcpd_unhexlify(uint8_t *dst
, size_t len
, const char *src
);
276 void odhcpd_hexlify(char *dst
, const uint8_t *src
, size_t len
);
277 const char *odhcpd_print_mac(const uint8_t *mac
, const size_t len
);
279 int odhcpd_bmemcmp(const void *av
, const void *bv
, size_t bits
);
280 void odhcpd_bmemcpy(void *av
, const void *bv
, size_t bits
);
282 int odhcpd_netmask2bitlen(bool v6
, void *mask
);
283 bool odhcpd_bitlen2netmask(bool v6
, unsigned int bits
, void *mask
);
284 bool odhcpd_valid_hostname(const char *name
);
286 int config_parse_interface(void *data
, size_t len
, const char *iname
, bool overwrite
);
290 const char* ubus_get_ifname(const char *name
);
291 void ubus_apply_network(void);
292 bool ubus_has_prefix(const char *name
, const char *ifname
);
293 void ubus_bcast_dhcp_event(const char *type
, const uint8_t *mac
, const size_t mac_len
,
294 const struct in_addr
*addr
, const char *name
, const char *interface
);
297 int netlink_add_netevent_handler(struct netevent_handler
*hdlr
);
298 ssize_t
netlink_get_interface_addrs(const int ifindex
, bool v6
,
299 struct odhcpd_ipaddr
**addrs
);
300 int netlink_setup_route(const struct in6_addr
*addr
, const int prefixlen
,
301 const int ifindex
, const struct in6_addr
*gw
,
302 const uint32_t metric
, const bool add
);
303 int netlink_setup_proxy_neigh(const struct in6_addr
*addr
,
304 const int ifindex
, const bool add
);
305 int netlink_setup_addr(struct odhcpd_ipaddr
*addr
,
306 const int ifindex
, const bool v6
, const bool add
);
307 void netlink_dump_neigh_table(const bool proxy
);
308 void netlink_dump_addr_table(const bool v6
);
310 // Exported module initializers
311 int netlink_init(void);
312 int router_init(void);
313 int dhcpv6_init(void);
315 #ifdef DHCPV4_SUPPORT
316 int dhcpv4_init(void);
318 int dhcpv4_setup_interface(struct interface
*iface
, bool enable
);
320 int router_setup_interface(struct interface
*iface
, bool enable
);
321 int dhcpv6_setup_interface(struct interface
*iface
, bool enable
);
322 int ndp_setup_interface(struct interface
*iface
, bool enable
);
324 void odhcpd_reload(void);