vulpineawoo/solanum
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Add code to get IPv4 addresses from 6to4 and Teredo IPv6 addresses.

Browse source 
It is not used yet.
This commit is contained in:
Jilles Tjoelker 2012-01-08 15:27:26 +01:00
parent 9319a2e206
commit 524a5b3ac7
3 changed files with 109 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

44
include/ipv4_from_ipv6.h Normal file
View file

@ -0,0 +1,44 @@
/*
* charybdis: An advanced ircd.
* ipv4_from_ipv6.h: Finds IPv4 addresses behind IPv6 transition technologies
*
* Copyright (C) 2012 Jilles Tjoelker
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* $Id$
*/
#ifndef _IPV4_FROM_IPV6_H_
#define _IPV4_FROM_IPV6_H_
#ifdef RB_IPV6
int ipv4_from_ipv6(const struct sockaddr_in6 *restrict ip6,
struct sockaddr_in *restrict ip4);
#endif
#endif

1
src/Makefile.in
View file

@ -66,6 +66,7 @@ SRCS = \
hash.c \
hook.c \
hostmask.c \
ipv4_from_ipv6.c \
irc_dictionary.c \
ircd.c \
ircd_signal.c \

64
src/ipv4_from_ipv6.c Normal file
View file

@ -0,0 +1,64 @@
/*
* charybdis: A slightly useful ircd.
* ipv4_from_ipv6.c: Finds IPv4 addresses behind IPv6 transition technologies
*
* Copyright (C) 2012 Jilles Tjoelker
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "stdinc.h"
#include "ipv4_from_ipv6.h"
#ifdef RB_IPV6
int
ipv4_from_ipv6(const struct sockaddr_in6 *restrict ip6,
struct sockaddr_in *restrict ip4)
{
int i;
if (!memcmp(ip6->sin6_addr.s6_addr, "\x20\x02", 2))
{
/* 6to4 and similar */
memcpy(&ip4->sin_addr, ip6->sin6_addr.s6_addr + 2, 4);
}
else if (!memcmp(ip6->sin6_addr.s6_addr, "\x20\x01\x00\x00", 4))
{
/* Teredo */
for (i = 0; i < 4; i++)
((uint8_t *)&ip4->sin_addr)[i] = 0xFF ^
ip6->sin6_addr.s6_addr[12 + i];
}
else
return 0;
SET_SS_LEN(ip4, sizeof(struct sockaddr_in));
ip4->sin_family = AF_INET;
ip4->sin_port = 0;
return 1;
}
#endif /* RB_IPV6 */