net.h revision e86eee143ed21592f88a46623a81f71002430459 
1/*
2 * dhcpcd - DHCP client daemon
3 * Copyright (c) 2006-2010 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
45#ifndef DUID_LEN
46#  define DUID_LEN			128 + 2
47#endif
48
49#define EUI64_ADDR_LEN			8
50#define INFINIBAND_ADDR_LEN		20
51
52/* Linux 2.4 doesn't define this */
53#ifndef ARPHRD_IEEE1394
54#  define ARPHRD_IEEE1394		24
55#endif
56
57/* The BSD's don't define this yet */
58#ifndef ARPHRD_INFINIBAND
59#  define ARPHRD_INFINIBAND		32
60#endif
61
62
63/* Work out if we have a private address or not
64 * 10/8
65 * 172.16/12
66 * 192.168/16
67 */
68#ifndef IN_PRIVATE
69# define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) ||	      \
70	    ((addr & 0xfff00000)    == 0xac100000) ||			      \
71	    ((addr & IN_CLASSB_NET) == 0xc0a80000))
72#endif
73
74#define LINKLOCAL_ADDR	0xa9fe0000
75#define LINKLOCAL_MASK	IN_CLASSB_NET
76#define LINKLOCAL_BRDC	(LINKLOCAL_ADDR | ~LINKLOCAL_MASK)
77
78#ifndef IN_LINKLOCAL
79# define IN_LINKLOCAL(addr) ((addr & IN_CLASSB_NET) == LINKLOCAL_ADDR)
80#endif
81
82struct rt {
83	struct in_addr dest;
84	struct in_addr net;
85	struct in_addr gate;
86	const struct interface *iface;
87	struct rt *next;
88};
89
90extern int socket_afnet;
91
92uint32_t get_netmask(uint32_t);
93char *hwaddr_ntoa(const unsigned char *, size_t);
94size_t hwaddr_aton(unsigned char *, const char *);
95
96int getifssid(const char *, char *);
97struct interface *init_interface(const char *);
98struct interface *discover_interfaces(int, char * const *);
99void free_interface(struct interface *);
100int do_mtu(const char *, short int);
101#define get_mtu(iface) do_mtu(iface, 0)
102#define set_mtu(iface, mtu) do_mtu(iface, mtu)
103
104int inet_ntocidr(struct in_addr);
105int inet_cidrtoaddr(int, struct in_addr *);
106
107int up_interface(struct interface *);
108int if_conf(struct interface *);
109int if_init(struct interface *);
110
111int do_address(const char *,
112    struct in_addr *, struct in_addr *, struct in_addr *, int);
113int if_address(const struct interface *,
114    const struct in_addr *, const struct in_addr *,
115    const struct in_addr *, int);
116#define add_address(iface, addr, net, brd)				      \
117	if_address(iface, addr, net, brd, 1)
118#define del_address(iface, addr, net)					      \
119	if_address(iface, addr, net, NULL, -1)
120#define has_address(iface, addr, net)					      \
121	do_address(iface, addr, net, NULL, 0)
122#define get_address(iface, addr, net, dst)				      \
123	do_address(iface, addr, net, dst, 1)
124
125int if_route(const struct interface *, const struct in_addr *,
126    const struct in_addr *, const struct in_addr *, int, int);
127#define add_route(iface, dest, mask, gate, metric)			      \
128	if_route(iface, dest, mask, gate, metric, 1)
129#define change_route(iface, dest, mask, gate, metric)			      \
130	if_route(iface, dest, mask, gate, metric, 0)
131#define del_route(iface, dest, mask, gate, metric)			      \
132	if_route(iface, dest, mask, gate, metric, -1)
133#define del_src_route(iface, dest, mask, gate, metric)			      \
134	if_route(iface, dest, mask, gate, metric, -2)
135void free_routes(struct rt *);
136
137int open_udp_socket(struct interface *);
138extern const size_t udp_dhcp_len;
139ssize_t make_udp_packet(uint8_t **, const uint8_t *, size_t,
140    struct in_addr, struct in_addr);
141ssize_t get_udp_data(const uint8_t **, const uint8_t *);
142int valid_udp_packet(const uint8_t *, size_t, struct in_addr *);
143
144int open_socket(struct interface *, int);
145ssize_t send_packet(const struct interface *, struct in_addr,
146    const uint8_t *, ssize_t);
147ssize_t send_raw_packet(const struct interface *, int,
148    const void *, ssize_t);
149ssize_t get_raw_packet(struct interface *, int, void *, ssize_t);
150
151int init_sockets(void);
152int open_link_socket(void);
153int manage_link(int);
154int carrier_status(struct interface *);
155#endif
156