File: socket.c

package info (click to toggle)
radvd 1:0.7.3-1
  • links: PTS
  • area: main
  • in suites: sarge
  • size: 608 kB
  • ctags: 280
  • sloc: sh: 5,816; ansic: 2,801; yacc: 415; lex: 121; makefile: 46
file content (107 lines) | stat: -rw-r--r-- 2,540 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
/*
 *   $Id: socket.c,v 1.6 2004/02/05 18:44:00 lutchann Exp $
 *
 *   Authors:
 *    Pedro Roque		<roque@di.fc.ul.pt>
 *    Lars Fenneberg		<lf@elemental.net>
 *
 *   This software is Copyright 1996,1997 by the above mentioned author(s), 
 *   All Rights Reserved.
 *
 *   The license which is distributed with this software in the file COPYRIGHT
 *   applies to this software. If your distribution is missing this file, you
 *   may request it from <lutchann@litech.org>.
 *
 */

#include <config.h>
#include <includes.h>
#include <radvd.h>

/* Note: these are applicable to receiving sockopts only */
#if defined IPV6_HOPLIMIT && !defined IPV6_RECVHOPLIMIT
# define IPV6_RECVHOPLIMIT IPV6_HOPLIMIT
#endif

#if defined IPV6_PKTINFO && !defined IPV6_RECVPKTINFO
# define IPV6_RECVPKTINFO IPV6_PKTINFO
#endif

int
open_icmpv6_socket(void)
{
	int sock;
	struct icmp6_filter filter;
	int err, val;

        sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
	if (sock < 0)
	{
		flog(LOG_ERR, "can't create socket(AF_INET6): %s", strerror(errno));
		return (-1);
	}

	val = 1;
	err = setsockopt(sock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &val, sizeof(val));
	if (err < 0)
	{
		flog(LOG_ERR, "setsockopt(IPV6_RECVPKTINFO): %s", strerror(errno));
		return (-1);
	}

	val = 2;
#ifdef __linux__
	err = setsockopt(sock, IPPROTO_RAW, IPV6_CHECKSUM, &val, sizeof(val));
#else
	err = setsockopt(sock, IPPROTO_IPV6, IPV6_CHECKSUM, &val, sizeof(val));
#endif
	if (err < 0)
	{
		flog(LOG_ERR, "setsockopt(IPV6_CHECKSUM): %s", strerror(errno));
		return (-1);
	}

	val = 255;
	err = setsockopt(sock, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &val, sizeof(val));
	if (err < 0)
	{
		flog(LOG_ERR, "setsockopt(IPV6_UNICAST_HOPS): %s", strerror(errno));
		return (-1);
	}

	val = 255;
	err = setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &val, sizeof(val));
	if (err < 0)
	{
		flog(LOG_ERR, "setsockopt(IPV6_MULTICAST_HOPS): %s", strerror(errno));
		return (-1);
	}

#ifdef IPV6_RECVHOPLIMIT
	val = 1;
	err = setsockopt(sock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &val, sizeof(val));
	if (err < 0)
	{
		flog(LOG_ERR, "setsockopt(IPV6_RECVHOPLIMIT): %s", strerror(errno));
		return (-1);
	}
#endif

	/*
	 * setup ICMP filter
	 */
	
	ICMP6_FILTER_SETBLOCKALL(&filter);
	ICMP6_FILTER_SETPASS(ND_ROUTER_SOLICIT, &filter);
	ICMP6_FILTER_SETPASS(ND_ROUTER_ADVERT, &filter);

	err = setsockopt(sock, IPPROTO_ICMPV6, ICMP6_FILTER, &filter,
			 sizeof(filter));
	if (err < 0)
	{
		flog(LOG_ERR, "setsockopt(ICMPV6_FILTER): %s", strerror(errno));
		return (-1);
	}

	return sock;
}