LXR linux/include/uapi/linux/if

   1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
   2/***************************************************************************
   3 * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661)
   4 *
   5 * This file supplies definitions required by the PPP over L2TP driver
   6 * (l2tp_ppp.c).  All version information wrt this file is located in l2tp_ppp.c
   7 *
   8 * License:
   9 *              This program is free software; you can redistribute it and/or
  10 *              modify it under the terms of the GNU General Public License
  11 *              as published by the Free Software Foundation; either version
  12 *              2 of the License, or (at your option) any later version.
  13 *
  14 */
  15
  16#ifndef _UAPI__LINUX_IF_PPPOL2TP_H
  17#define _UAPI__LINUX_IF_PPPOL2TP_H
  18
  19#include <linux/types.h>
  20#include <linux/in.h>
  21#include <linux/in6.h>
  22#include <linux/l2tp.h>
  23
  24/* Structure used to connect() the socket to a particular tunnel UDP
  25 * socket over IPv4.
  26 */
  27struct pppol2tp_addr {
  28        __kernel_pid_t  pid;            /* pid that owns the fd.
  29                                         * 0 => current */
  30        int     fd;                     /* FD of UDP socket to use */
  31
  32        struct sockaddr_in addr;        /* IP address and port to send to */
  33
  34        __u16 s_tunnel, s_session;      /* For matching incoming packets */
  35        __u16 d_tunnel, d_session;      /* For sending outgoing packets */
  36};
  37
  38/* Structure used to connect() the socket to a particular tunnel UDP
  39 * socket over IPv6.
  40 */
  41struct pppol2tpin6_addr {
  42        __kernel_pid_t  pid;            /* pid that owns the fd.
  43                                         * 0 => current */
  44        int     fd;                     /* FD of UDP socket to use */
  45
  46        __u16 s_tunnel, s_session;      /* For matching incoming packets */
  47        __u16 d_tunnel, d_session;      /* For sending outgoing packets */
  48
  49        struct sockaddr_in6 addr;       /* IP address and port to send to */
  50};
  51
  52/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
  53 * bits. So we need a different sockaddr structure.
  54 */
  55struct pppol2tpv3_addr {
  56        __kernel_pid_t  pid;            /* pid that owns the fd.
  57                                         * 0 => current */
  58        int     fd;                     /* FD of UDP or IP socket to use */
  59
  60        struct sockaddr_in addr;        /* IP address and port to send to */
  61
  62        __u32 s_tunnel, s_session;      /* For matching incoming packets */
  63        __u32 d_tunnel, d_session;      /* For sending outgoing packets */
  64};
  65
  66struct pppol2tpv3in6_addr {
  67        __kernel_pid_t  pid;            /* pid that owns the fd.
  68                                         * 0 => current */
  69        int     fd;                     /* FD of UDP or IP socket to use */
  70
  71        __u32 s_tunnel, s_session;      /* For matching incoming packets */
  72        __u32 d_tunnel, d_session;      /* For sending outgoing packets */
  73
  74        struct sockaddr_in6 addr;       /* IP address and port to send to */
  75};
  76
  77/* Socket options:
  78 * DEBUG        - bitmask of debug message categories (not used)
  79 * SENDSEQ      - 0 => don't send packets with sequence numbers
  80 *                1 => send packets with sequence numbers
  81 * RECVSEQ      - 0 => receive packet sequence numbers are optional
  82 *                1 => drop receive packets without sequence numbers
  83 * LNSMODE      - 0 => act as LAC.
  84 *                1 => act as LNS.
  85 * REORDERTO    - reorder timeout (in millisecs). If 0, don't try to reorder.
  86 */
  87enum {
  88        PPPOL2TP_SO_DEBUG       = 1,
  89        PPPOL2TP_SO_RECVSEQ     = 2,
  90        PPPOL2TP_SO_SENDSEQ     = 3,
  91        PPPOL2TP_SO_LNSMODE     = 4,
  92        PPPOL2TP_SO_REORDERTO   = 5,
  93};
  94
  95/* Debug message categories for the DEBUG socket option (deprecated) */
  96enum {
  97        PPPOL2TP_MSG_DEBUG      = L2TP_MSG_DEBUG,
  98        PPPOL2TP_MSG_CONTROL    = L2TP_MSG_CONTROL,
  99        PPPOL2TP_MSG_SEQ        = L2TP_MSG_SEQ,
 100        PPPOL2TP_MSG_DATA       = L2TP_MSG_DATA,
 101};
 102
 103
 104
 105#endif /* _UAPI__LINUX_IF_PPPOL2TP_H */
 106