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}}}
62 extern struct list_head leases
;
65 struct uloop_fd uloop
;
66 void (*handle_dgram
)(void *addr
, void *data
, size_t len
,
67 struct interface
*iface
, void *dest_addr
);
68 void (*handle_error
)(int error
);
72 struct odhcpd_ipaddr
{
88 enum odhcpd_assignment_flags
{
90 OAF_STATIC
= (1 << 1),
101 struct list_head head
;
102 struct in_addr ipaddr
;
104 struct ether_addr mac
;
107 uint32_t dhcpv4_leasetime
;
113 struct list_head head
;
116 char ifname
[IF_NAMESIZE
];
117 char name
[IF_NAMESIZE
];
120 struct uloop_timeout timer_rs
;
121 struct list_head ia_assignments
;
122 struct odhcpd_ipaddr ia_addr
[RELAYD_MAX_ADDRS
];
127 struct odhcpd_event dhcpv6_event
;
128 struct odhcpd_event dhcpv4_event
;
129 struct odhcpd_event ndp_event
;
130 struct list_head dhcpv4_assignments
;
133 char dhcpv6_pd_manager
[128];
134 struct in6_addr dhcpv6_pd_cer
;
138 enum odhcpd_mode dhcpv6
;
139 enum odhcpd_mode ndp
;
140 enum odhcpd_mode dhcpv4
;
147 bool always_rewrite_dns
;
150 bool no_dynamic_dhcp
;
155 int route_preference
;
159 struct in_addr dhcpv4_start
;
160 struct in_addr dhcpv4_end
;
161 struct in_addr
*dhcpv4_router
;
162 size_t dhcpv4_router_cnt
;
163 struct in_addr
*dhcpv4_dns
;
164 size_t dhcpv4_dns_cnt
;
165 uint32_t dhcpv4_leasetime
;
168 struct in6_addr
*dns
;
174 size_t dhcpv6_raw_len
;
182 extern struct list_head interfaces
;
184 #define RELAYD_MANAGED_MFLAG 1
185 #define RELAYD_MANAGED_NO_AFLAG 2
188 // Exported main functions
189 int odhcpd_open_rtnl(void);
190 int odhcpd_register(struct odhcpd_event
*event
);
191 void odhcpd_process(struct odhcpd_event
*event
);
193 ssize_t
odhcpd_send(int socket
, struct sockaddr_in6
*dest
,
194 struct iovec
*iov
, size_t iov_len
,
195 const struct interface
*iface
);
196 ssize_t
odhcpd_get_interface_addresses(int ifindex
,
197 struct odhcpd_ipaddr
*addrs
, size_t cnt
);
198 int odhcpd_get_linklocal_interface_address(int ifindex
, struct in6_addr
*lladdr
);
199 struct interface
* odhcpd_get_interface_by_name(const char *name
);
200 int odhcpd_get_interface_config(const char *ifname
, const char *what
);
201 int odhcpd_get_mac(const struct interface
*iface
, uint8_t mac
[6]);
202 struct interface
* odhcpd_get_interface_by_index(int ifindex
);
203 struct interface
* odhcpd_get_master_interface(void);
204 int odhcpd_urandom(void *data
, size_t len
);
205 void odhcpd_setup_route(const struct in6_addr
*addr
, int prefixlen
,
206 const struct interface
*iface
, const struct in6_addr
*gw
,
207 int metric
, bool add
);
209 void odhcpd_run(void);
210 time_t odhcpd_time(void);
211 ssize_t
odhcpd_unhexlify(uint8_t *dst
, size_t len
, const char *src
);
212 void odhcpd_hexlify(char *dst
, const uint8_t *src
, size_t len
);
214 int odhcpd_bmemcmp(const void *av
, const void *bv
, size_t bits
);
215 void odhcpd_bmemcpy(void *av
, const void *bv
, size_t bits
);
217 int config_parse_interface(void *data
, size_t len
, const char *iname
, bool overwrite
);
221 const char* ubus_get_ifname(const char *name
);
222 void ubus_apply_network(void);
223 bool ubus_has_prefix(const char *name
, const char *ifname
);
227 // Exported module initializers
228 int init_router(void);
229 int init_dhcpv6(void);
230 int init_dhcpv4(void);
233 int setup_router_interface(struct interface
*iface
, bool enable
);
234 int setup_dhcpv6_interface(struct interface
*iface
, bool enable
);
235 int setup_ndp_interface(struct interface
*iface
, bool enable
);
236 int setup_dhcpv4_interface(struct interface
*iface
, bool enable
);
238 void odhcpd_reload(void);