root/include/linux/if_pppol2tp.h

INCLUDED FROM

/***************************************************************************
 * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661)
 *
 * This file supplies definitions required by the PPP over L2TP driver
 * (pppol2tp.c).  All version information wrt this file is located in pppol2tp.c
 *
 * License:
 *              This program is free software; you can redistribute it and/or
 *              modify it under the terms of the GNU General Public License
 *              as published by the Free Software Foundation; either version
 *              2 of the License, or (at your option) any later version.
 *
 */

#ifndef __LINUX_IF_PPPOL2TP_H
#define __LINUX_IF_PPPOL2TP_H

#include <asm/types.h>

#ifdef __KERNEL__
#include <linux/in.h>
#endif

/* Structure used to connect() the socket to a particular tunnel UDP
 * socket.
 */
struct pppol2tp_addr
{
        pid_t   pid;                    /* pid that owns the fd.
                                         * 0 => current */
        int     fd;                     /* FD of UDP socket to use */

        struct sockaddr_in addr;        /* IP address and port to send to */

        __u16 s_tunnel, s_session;      /* For matching incoming packets */
        __u16 d_tunnel, d_session;      /* For sending outgoing packets */
};

/* Socket options:
 * DEBUG        - bitmask of debug message categories
 * SENDSEQ      - 0 => don't send packets with sequence numbers
 *                1 => send packets with sequence numbers
 * RECVSEQ      - 0 => receive packet sequence numbers are optional
 *                1 => drop receive packets without sequence numbers
 * LNSMODE      - 0 => act as LAC.
 *                1 => act as LNS.
 * REORDERTO    - reorder timeout (in millisecs). If 0, don't try to reorder.
 */
enum {
        PPPOL2TP_SO_DEBUG       = 1,
        PPPOL2TP_SO_RECVSEQ     = 2,
        PPPOL2TP_SO_SENDSEQ     = 3,
        PPPOL2TP_SO_LNSMODE     = 4,
        PPPOL2TP_SO_REORDERTO   = 5,
};

/* Debug message categories for the DEBUG socket option */
enum {
        PPPOL2TP_MSG_DEBUG      = (1 << 0),     /* verbose debug (if
                                                 * compiled in) */
        PPPOL2TP_MSG_CONTROL    = (1 << 1),     /* userspace - kernel
                                                 * interface */
        PPPOL2TP_MSG_SEQ        = (1 << 2),     /* sequence numbers */
        PPPOL2TP_MSG_DATA       = (1 << 3),     /* data packets */
};



#endif