1                 : /*
       2                 :  * packets.h - helpers to send Teredo packet
       3                 :  * $Id: packets.h 1938 2007-02-22 20:55:28Z remi $
       4                 :  *
       5                 :  * See "Teredo: Tunneling IPv6 over UDP through NATs"
       6                 :  * for more information
       7                 :  */
       8                 : 
       9                 : /***********************************************************************
      10                 :  *  Copyright © 2004-2007 Rémi Denis-Courmont.                         *
      11                 :  *  This program is free software; you can redistribute and/or modify  *
      12                 :  *  it under the terms of the GNU General Public License as published  *
      13                 :  *  by the Free Software Foundation; version 2 of the license.         *
      14                 :  *                                                                     *
      15                 :  *  This program is distributed in the hope that it will be useful,    *
      16                 :  *  but WITHOUT ANY WARRANTY; without even the implied warranty of     *
      17                 :  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.               *
      18                 :  *  See the GNU General Public License for more details.               *
      19                 :  *                                                                     *
      20                 :  *  You should have received a copy of the GNU General Public License  *
      21                 :  *  along with this program; if not, you can get it from:              *
      22                 :  *  http://www.gnu.org/copyleft/gpl.html                               *
      23                 :  ***********************************************************************/
      24                 : 
      25                 : #ifndef LIBTEREDO_TEREDO_PACKETS_H
      26                 : # define LIBTEREDO_TEREDO_PACKETS_H
      27                 : 
      28                 : struct in6_addr;
      29                 : struct ip6_hdr;
      30                 : struct icmp6_hdr;
      31                 : 
      32                 : # ifdef __cplusplus
      33                 : extern "C" {
      34                 : #endif
      35                 : 
      36                 : int teredo_parse_ra (const teredo_packet *restrict packet,
      37                 :                      union teredo_addr *restrict newaddr,
      38                 :                      bool cone, uint16_t *restrict mtu);
      39                 : 
      40                 : int CheckPing (const teredo_packet *packet);
      41                 : int CheckBubble (const teredo_packet *packet);
      42                 : 
      43                 : 
      44                 : int SendBubbleFromDst (int fd, const struct in6_addr *dst, bool indirect);
      45                 : int teredo_send_bubble (int fd, uint32_t ip, uint16_t port,
      46                 :                         const uint8_t *src, const uint8_t *dst);
      47                 : 
      48                 : static inline int teredo_reply_bubble (int fd, uint32_t ip, uint16_t port,
      49                 :                                        const uint8_t *req)
      50               0 : {
      51               0 :         return teredo_send_bubble (fd, ip, port, req + 8 + 16, req + 8);
      52                 : }
      53                 : 
      54                 : int teredo_send_rs (int fd, uint32_t server_ip,
      55                 :                     const unsigned char *nonce, bool cone);
      56                 : 
      57                 : int SendPing (int fd, const union teredo_addr *src,
      58                 :               const struct in6_addr *dst);
      59                 : 
      60                 : int BuildICMPv6Error (struct icmp6_hdr *restrict out, uint8_t type,
      61                 :                       uint8_t code, const void *restrict in, size_t inlen);
      62                 : 
      63                 : # if 0
      64                 : int BuildIPv6Error (struct ip6_hdr *out, const struct in6_addr *src,
      65                 :                     uint8_t type, uint8_t code, const void *in, uint16_t len);
      66                 : #endif
      67                 : 
      68                 : # ifdef __cplusplus
      69                 : }
      70                 : #endif
      71                 : 
      72                 : 
      73                 : #endif