1/*
2 * dhcpcd - DHCP client daemon
3 * Copyright (c) 2006-2011 Roy Marples <roy@marples.name>
4 * All rights reserved
5
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#ifndef INTERFACE_H
29#define INTERFACE_H
30
31#include <sys/types.h>
32#include <sys/param.h>
33#include <sys/socket.h>
34
35#include <net/if.h>
36#include <netinet/in.h>
37#include <netinet/if_ether.h>
38
39#include <limits.h>
40
41#include "config.h"
42#include "dhcp.h"
43#include "dhcpcd.h"
44#include "ipv6.h"
45
46/* Some systems have route metrics */
47#ifndef HAVE_ROUTE_METRIC
48# ifdef __linux__
49#  define HAVE_ROUTE_METRIC 1
50# endif
51# ifndef HAVE_ROUTE_METRIC
52#  define HAVE_ROUTE_METRIC 0
53# endif
54#endif
55
56#ifndef DUID_LEN
57#  define DUID_LEN			128 + 2
58#endif
59
60#define EUI64_ADDR_LEN			8
61#define INFINIBAND_ADDR_LEN		20
62
63/* Linux 2.4 doesn't define this */
64#ifndef ARPHRD_IEEE1394
65#  define ARPHRD_IEEE1394		24
66#endif
67
68/* The BSD's don't define this yet */
69#ifndef ARPHRD_INFINIBAND
70#  define ARPHRD_INFINIBAND		32
71#endif
72
73/* Work out if we have a private address or not
74 * 10/8
75 * 172.16/12
76 * 192.168/16
77 */
78#ifndef IN_PRIVATE
79# define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) ||	      \
80	    ((addr & 0xfff00000)    == 0xac100000) ||			      \
81	    ((addr & IN_CLASSB_NET) == 0xc0a80000))
82#endif
83
84#define LINKLOCAL_ADDR	0xa9fe0000
85#define LINKLOCAL_MASK	IN_CLASSB_NET
86#define LINKLOCAL_BRDC	(LINKLOCAL_ADDR | ~LINKLOCAL_MASK)
87
88#ifndef IN_LINKLOCAL
89# define IN_LINKLOCAL(addr) ((addr & IN_CLASSB_NET) == LINKLOCAL_ADDR)
90#endif
91
92struct rt {
93	struct in_addr dest;
94	struct in_addr net;
95	struct in_addr gate;
96	const struct interface *iface;
97	int metric;
98	struct in_addr src;
99	struct rt *next;
100};
101
102extern int socket_afnet;
103
104uint32_t get_netmask(uint32_t);
105char *hwaddr_ntoa(const unsigned char *, size_t);
106size_t hwaddr_aton(unsigned char *, const char *);
107
108int getifssid(const char *, char *);
109struct interface *discover_interfaces(int, char * const *);
110void free_interface(struct interface *);
111int do_mtu(const char *, short int);
112#define get_mtu(iface) do_mtu(iface, 0)
113#define set_mtu(iface, mtu) do_mtu(iface, mtu)
114
115int inet_ntocidr(struct in_addr);
116int inet_cidrtoaddr(int, struct in_addr *);
117
118int up_interface(struct interface *);
119int if_conf(struct interface *);
120int if_init(struct interface *);
121
122int do_address(const char *,
123    struct in_addr *, struct in_addr *, struct in_addr *, int);
124int if_address(const struct interface *,
125    const struct in_addr *, const struct in_addr *,
126    const struct in_addr *, int);
127#define add_address(iface, addr, net, brd)				      \
128	if_address(iface, addr, net, brd, 1)
129#define del_address(iface, addr, net)					      \
130	if_address(iface, addr, net, NULL, -1)
131#define has_address(iface, addr, net)					      \
132	do_address(iface, addr, net, NULL, 0)
133#define get_address(iface, addr, net, dst)				      \
134	do_address(iface, addr, net, dst, 1)
135
136int if_route(const struct rt *rt, int);
137#define add_route(rt) if_route(rt, 1)
138#define change_route(rt) if_route(rt, 0)
139#define del_route(rt) if_route(rt, -1)
140#define del_src_route(rt) if_route(rt, -2);
141void free_routes(struct rt *);
142
143int if_address6(const struct interface *, const struct ipv6_addr *, int);
144#define add_address6(ifp, a) if_address6(ifp, a, 1)
145#define del_address6(ifp, a) if_address6(ifp, a, -1)
146
147int if_route6(const struct rt6 *rt, int);
148#define add_route6(rt) if_route6(rt, 1)
149#define change_route6(rt) if_route6(rt, 0)
150#define del_route6(rt) if_route6(rt, -1)
151#define del_src_route6(rt) if_route6(rt, -2);
152
153int open_udp_socket(struct interface *);
154extern const size_t udp_dhcp_len;
155ssize_t make_udp_packet(uint8_t **, const uint8_t *, size_t,
156    struct in_addr, struct in_addr);
157ssize_t get_udp_data(const uint8_t **, const uint8_t *);
158int valid_udp_packet(const uint8_t *, size_t, struct in_addr *, int);
159
160int open_socket(struct interface *, int);
161ssize_t send_packet(const struct interface *, struct in_addr,
162    const uint8_t *, ssize_t);
163ssize_t send_raw_packet(const struct interface *, int,
164    const void *, ssize_t);
165ssize_t get_raw_packet(struct interface *, int, void *, ssize_t, int *);
166
167int init_sockets(void);
168int open_link_socket(void);
169int manage_link(int);
170int carrier_status(struct interface *);
171#endif
172