linux/include/linux/if_pppol2tp.h
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   1/***************************************************************************
   2 * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661)
   3 *
   4 * This file supplies definitions required by the PPP over L2TP driver
   5 * (l2tp_ppp.c).  All version information wrt this file is located in l2tp_ppp.c
   6 *
   7 * License:
   8 *              This program is free software; you can redistribute it and/or
   9 *              modify it under the terms of the GNU General Public License
  10 *              as published by the Free Software Foundation; either version
  11 *              2 of the License, or (at your option) any later version.
  12 *
  13 */
  14
  15#ifndef __LINUX_IF_PPPOL2TP_H
  16#define __LINUX_IF_PPPOL2TP_H
  17
  18#include <linux/types.h>
  19
  20#ifdef __KERNEL__
  21#include <linux/in.h>
  22#include <linux/in6.h>
  23#endif
  24
  25/* Structure used to connect() the socket to a particular tunnel UDP
  26 * socket over IPv4.
  27 */
  28struct pppol2tp_addr {
  29        __kernel_pid_t  pid;            /* pid that owns the fd.
  30                                         * 0 => current */
  31        int     fd;                     /* FD of UDP socket to use */
  32
  33        struct sockaddr_in addr;        /* IP address and port to send to */
  34
  35        __u16 s_tunnel, s_session;      /* For matching incoming packets */
  36        __u16 d_tunnel, d_session;      /* For sending outgoing packets */
  37};
  38
  39/* Structure used to connect() the socket to a particular tunnel UDP
  40 * socket over IPv6.
  41 */
  42struct pppol2tpin6_addr {
  43        __kernel_pid_t  pid;            /* pid that owns the fd.
  44                                         * 0 => current */
  45        int     fd;                     /* FD of UDP socket to use */
  46
  47        __u16 s_tunnel, s_session;      /* For matching incoming packets */
  48        __u16 d_tunnel, d_session;      /* For sending outgoing packets */
  49
  50        struct sockaddr_in6 addr;       /* IP address and port to send to */
  51};
  52
  53/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
  54 * bits. So we need a different sockaddr structure.
  55 */
  56struct pppol2tpv3_addr {
  57        __kernel_pid_t  pid;            /* pid that owns the fd.
  58                                         * 0 => current */
  59        int     fd;                     /* FD of UDP or IP socket to use */
  60
  61        struct sockaddr_in addr;        /* IP address and port to send to */
  62
  63        __u32 s_tunnel, s_session;      /* For matching incoming packets */
  64        __u32 d_tunnel, d_session;      /* For sending outgoing packets */
  65};
  66
  67struct pppol2tpv3in6_addr {
  68        __kernel_pid_t  pid;            /* pid that owns the fd.
  69                                         * 0 => current */
  70        int     fd;                     /* FD of UDP or IP socket to use */
  71
  72        __u32 s_tunnel, s_session;      /* For matching incoming packets */
  73        __u32 d_tunnel, d_session;      /* For sending outgoing packets */
  74
  75        struct sockaddr_in6 addr;       /* IP address and port to send to */
  76};
  77
  78/* Socket options:
  79 * DEBUG        - bitmask of debug message categories
  80 * SENDSEQ      - 0 => don't send packets with sequence numbers
  81 *                1 => send packets with sequence numbers
  82 * RECVSEQ      - 0 => receive packet sequence numbers are optional
  83 *                1 => drop receive packets without sequence numbers
  84 * LNSMODE      - 0 => act as LAC.
  85 *                1 => act as LNS.
  86 * REORDERTO    - reorder timeout (in millisecs). If 0, don't try to reorder.
  87 */
  88enum {
  89        PPPOL2TP_SO_DEBUG       = 1,
  90        PPPOL2TP_SO_RECVSEQ     = 2,
  91        PPPOL2TP_SO_SENDSEQ     = 3,
  92        PPPOL2TP_SO_LNSMODE     = 4,
  93        PPPOL2TP_SO_REORDERTO   = 5,
  94};
  95
  96/* Debug message categories for the DEBUG socket option */
  97enum {
  98        PPPOL2TP_MSG_DEBUG      = (1 << 0),     /* verbose debug (if
  99                                                 * compiled in) */
 100        PPPOL2TP_MSG_CONTROL    = (1 << 1),     /* userspace - kernel
 101                                                 * interface */
 102        PPPOL2TP_MSG_SEQ        = (1 << 2),     /* sequence numbers */
 103        PPPOL2TP_MSG_DATA       = (1 << 3),     /* data packets */
 104};
 105
 106
 107
 108#endif
 109
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