LXR linux/include/uapi/linux/if

   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 _UAPI__LINUX_IF_PPPOL2TP_H
  16#define _UAPI__LINUX_IF_PPPOL2TP_H
  17
  18#include <linux/types.h>
  19
  20
  21/* Structure used to connect() the socket to a particular tunnel UDP
  22 * socket over IPv4.
  23 */
  24struct pppol2tp_addr {
  25        __kernel_pid_t  pid;            /* pid that owns the fd.
  26                                         * 0 => current */
  27        int     fd;                     /* FD of UDP socket to use */
  28
  29        struct sockaddr_in addr;        /* IP address and port to send to */
  30
  31        __u16 s_tunnel, s_session;      /* For matching incoming packets */
  32        __u16 d_tunnel, d_session;      /* For sending outgoing packets */
  33};
  34
  35/* Structure used to connect() the socket to a particular tunnel UDP
  36 * socket over IPv6.
  37 */
  38struct pppol2tpin6_addr {
  39        __kernel_pid_t  pid;            /* pid that owns the fd.
  40                                         * 0 => current */
  41        int     fd;                     /* FD of UDP socket to use */
  42
  43        __u16 s_tunnel, s_session;      /* For matching incoming packets */
  44        __u16 d_tunnel, d_session;      /* For sending outgoing packets */
  45
  46        struct sockaddr_in6 addr;       /* IP address and port to send to */
  47};
  48
  49/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
  50 * bits. So we need a different sockaddr structure.
  51 */
  52struct pppol2tpv3_addr {
  53        __kernel_pid_t  pid;            /* pid that owns the fd.
  54                                         * 0 => current */
  55        int     fd;                     /* FD of UDP or IP socket to use */
  56
  57        struct sockaddr_in addr;        /* IP address and port to send to */
  58
  59        __u32 s_tunnel, s_session;      /* For matching incoming packets */
  60        __u32 d_tunnel, d_session;      /* For sending outgoing packets */
  61};
  62
  63struct pppol2tpv3in6_addr {
  64        __kernel_pid_t  pid;            /* pid that owns the fd.
  65                                         * 0 => current */
  66        int     fd;                     /* FD of UDP or IP socket to use */
  67
  68        __u32 s_tunnel, s_session;      /* For matching incoming packets */
  69        __u32 d_tunnel, d_session;      /* For sending outgoing packets */
  70
  71        struct sockaddr_in6 addr;       /* IP address and port to send to */
  72};
  73
  74/* Socket options:
  75 * DEBUG        - bitmask of debug message categories
  76 * SENDSEQ      - 0 => don't send packets with sequence numbers
  77 *                1 => send packets with sequence numbers
  78 * RECVSEQ      - 0 => receive packet sequence numbers are optional
  79 *                1 => drop receive packets without sequence numbers
  80 * LNSMODE      - 0 => act as LAC.
  81 *                1 => act as LNS.
  82 * REORDERTO    - reorder timeout (in millisecs). If 0, don't try to reorder.
  83 */
  84enum {
  85        PPPOL2TP_SO_DEBUG       = 1,
  86        PPPOL2TP_SO_RECVSEQ     = 2,
  87        PPPOL2TP_SO_SENDSEQ     = 3,
  88        PPPOL2TP_SO_LNSMODE     = 4,
  89        PPPOL2TP_SO_REORDERTO   = 5,
  90};
  91
  92/* Debug message categories for the DEBUG socket option */
  93enum {
  94        PPPOL2TP_MSG_DEBUG      = (1 << 0),     /* verbose debug (if
  95                                                 * compiled in) */
  96        PPPOL2TP_MSG_CONTROL    = (1 << 1),     /* userspace - kernel
  97                                                 * interface */
  98        PPPOL2TP_MSG_SEQ        = (1 << 2),     /* sequence numbers */
  99        PPPOL2TP_MSG_DATA       = (1 << 3),     /* data packets */
 100};
 101
 102
 103
 104#endif /* _UAPI__LINUX_IF_PPPOL2TP_H */
 105