/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/***************************************************************************
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* Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661)
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*
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* This file supplies definitions required by the PPP over L2TP driver
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* (l2tp_ppp.c). All version information wrt this file is located in l2tp_ppp.c
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*
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* License:
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#ifndef _UAPI__LINUX_IF_PPPOL2TP_H
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#define _UAPI__LINUX_IF_PPPOL2TP_H
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#include <linux/types.h>
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/l2tp.h>
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/* Structure used to connect() the socket to a particular tunnel UDP
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* socket over IPv4.
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*/
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struct pppol2tp_addr {
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__kernel_pid_t pid; /* pid that owns the fd.
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* 0 => current */
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int fd; /* FD of UDP socket to use */
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struct sockaddr_in addr; /* IP address and port to send to */
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__u16 s_tunnel, s_session; /* For matching incoming packets */
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__u16 d_tunnel, d_session; /* For sending outgoing packets */
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};
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/* Structure used to connect() the socket to a particular tunnel UDP
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* socket over IPv6.
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*/
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struct pppol2tpin6_addr {
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__kernel_pid_t pid; /* pid that owns the fd.
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* 0 => current */
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int fd; /* FD of UDP socket to use */
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__u16 s_tunnel, s_session; /* For matching incoming packets */
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__u16 d_tunnel, d_session; /* For sending outgoing packets */
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struct sockaddr_in6 addr; /* IP address and port to send to */
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};
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/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
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* bits. So we need a different sockaddr structure.
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*/
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struct pppol2tpv3_addr {
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__kernel_pid_t pid; /* pid that owns the fd.
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* 0 => current */
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int fd; /* FD of UDP or IP socket to use */
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struct sockaddr_in addr; /* IP address and port to send to */
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__u32 s_tunnel, s_session; /* For matching incoming packets */
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__u32 d_tunnel, d_session; /* For sending outgoing packets */
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};
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struct pppol2tpv3in6_addr {
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__kernel_pid_t pid; /* pid that owns the fd.
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* 0 => current */
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int fd; /* FD of UDP or IP socket to use */
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__u32 s_tunnel, s_session; /* For matching incoming packets */
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__u32 d_tunnel, d_session; /* For sending outgoing packets */
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struct sockaddr_in6 addr; /* IP address and port to send to */
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};
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/* Socket options:
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* DEBUG - bitmask of debug message categories (not used)
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* SENDSEQ - 0 => don't send packets with sequence numbers
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* 1 => send packets with sequence numbers
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* RECVSEQ - 0 => receive packet sequence numbers are optional
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* 1 => drop receive packets without sequence numbers
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* LNSMODE - 0 => act as LAC.
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* 1 => act as LNS.
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* REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder.
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*/
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enum {
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PPPOL2TP_SO_DEBUG = 1,
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PPPOL2TP_SO_RECVSEQ = 2,
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PPPOL2TP_SO_SENDSEQ = 3,
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PPPOL2TP_SO_LNSMODE = 4,
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PPPOL2TP_SO_REORDERTO = 5,
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};
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/* Debug message categories for the DEBUG socket option (deprecated) */
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enum {
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PPPOL2TP_MSG_DEBUG = L2TP_MSG_DEBUG,
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PPPOL2TP_MSG_CONTROL = L2TP_MSG_CONTROL,
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PPPOL2TP_MSG_SEQ = L2TP_MSG_SEQ,
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PPPOL2TP_MSG_DATA = L2TP_MSG_DATA,
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};
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#endif /* _UAPI__LINUX_IF_PPPOL2TP_H */
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