include/uapi/linux/if_pppol2tp.h

   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  */
  24 struct 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  */
  38 struct 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  */
  52 struct 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
  63 struct 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  */
  84 enum {
  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 */
  93 enum {
  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 */