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 * (pppol2tp.c). All version information wrt this file is located in pppol2tp.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 __LINUX_IF_PPPOL2TP_H 16#define __LINUX_IF_PPPOL2TP_H 17 18#include <asm/types.h> 19 20#ifdef __KERNEL__ 21#include <linux/in.h> 22#endif 23 24/* Structure used to bind() the socket to a particular socket & tunnel */ 25struct pppol2tp_addr 26{ 27 pid_t pid; /* pid that owns the fd. 28 * 0 => current */ 29 int fd; /* FD of UDP socket to use */ 30 31 struct sockaddr_in addr; /* IP address and port to send to */ 32 33 __u16 s_tunnel, s_session; /* For matching incoming packets */ 34 __u16 d_tunnel, d_session; /* For sending outgoing packets */ 35}; 36 37/* Socket options: 38 * DEBUG - bitmask of debug message categories 39 * SENDSEQ - 0 => don't send packets with sequence numbers 40 * 1 => send packets with sequence numbers 41 * RECVSEQ - 0 => receive packet sequence numbers are optional 42 * 1 => drop receive packets without sequence numbers 43 * LNSMODE - 0 => act as LAC. 44 * 1 => act as LNS. 45 * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder. 46 */ 47enum { 48 PPPOL2TP_SO_DEBUG = 1, 49 PPPOL2TP_SO_RECVSEQ = 2, 50 PPPOL2TP_SO_SENDSEQ = 3, 51 PPPOL2TP_SO_LNSMODE = 4, 52 PPPOL2TP_SO_REORDERTO = 5, 53}; 54 55/* Debug message categories for the DEBUG socket option */ 56enum { 57 PPPOL2TP_MSG_DEBUG = (1 << 0), /* verbose debug (if 58 * compiled in) */ 59 PPPOL2TP_MSG_CONTROL = (1 << 1), /* userspace - kernel 60 * interface */ 61 PPPOL2TP_MSG_SEQ = (1 << 2), /* sequence numbers */ 62 PPPOL2TP_MSG_DATA = (1 << 3), /* data packets */ 63}; 64 65 66 67#endif 68