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/***************************************************************************

 * 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