1                 : /*
       2                 :  * checksum.h - ICMPv6 checksumming
       3                 :  * $Id: checksum.h 1938 2007-02-22 20:55:28Z remi $
       4                 :  */
       5                 : 
       6                 : /***********************************************************************
       7                 :  *  Copyright © 2004-2007 Rémi Denis-Courmont.                         *
       8                 :  *  This program is free software; you can redistribute and/or modify  *
       9                 :  *  it under the terms of the GNU General Public License as published  *
      10                 :  *  by the Free Software Foundation; version 2 of the license.         *
      11                 :  *                                                                     *
      12                 :  *  This program is distributed in the hope that it will be useful,    *
      13                 :  *  but WITHOUT ANY WARRANTY; without even the implied warranty of     *
      14                 :  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.               *
      15                 :  *  See the GNU General Public License for more details.               *
      16                 :  *                                                                     *
      17                 :  *  You should have received a copy of the GNU General Public License  *
      18                 :  *  along with this program; if not, you can get it from:              *
      19                 :  *  http://www.gnu.org/copyleft/gpl.html                               *
      20                 :  ***********************************************************************/
      21                 : 
      22                 : #ifndef LIBTEREDO_TEREDO_CHECKSUM_H
      23                 : # define LIBTEREDO_TEREDO_CHECKSUM_H
      24                 : 
      25                 : # include <sys/types.h>
      26                 : # include <netinet/in.h>
      27                 : 
      28                 : /*
      29                 :  * Computes an ICMPv6 over IPv6 packet checksum.
      30                 :  * Jumbo datagrams not supported (but you don't care, do you?).
      31                 :  */
      32                 : static inline uint16_t
      33                 : icmp6_checksum (const struct ip6_hdr *ip6, const struct icmp6_hdr *icmp6)
      34               0 : {
      35               0 :         struct iovec iov = { (void *)icmp6, ntohs (ip6->ip6_plen) };
      36               0 :         return teredo_cksum (&ip6->ip6_src, &ip6->ip6_dst, IPPROTO_ICMPV6, &iov, 1);
      37                 : }
      38                 : 
      39                 : #endif
      40                 :