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 __LINUX_IF_PPPOL2TP_H 16#define __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. 23 */ 24struct 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/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32 36 * bits. So we need a different sockaddr structure. 37 */ 38struct pppol2tpv3_addr { 39 pid_t pid; /* pid that owns the fd. 40 * 0 => current */ 41 int fd; /* FD of UDP or IP socket to use */ 42 43 struct sockaddr_in addr; /* IP address and port to send to */ 44 45 __u32 s_tunnel, s_session; /* For matching incoming packets */ 46 __u32 d_tunnel, d_session; /* For sending outgoing packets */ 47}; 48 49/* Socket options: 50 * DEBUG - bitmask of debug message categories 51 * SENDSEQ - 0 => don't send packets with sequence numbers 52 * 1 => send packets with sequence numbers 53 * RECVSEQ - 0 => receive packet sequence numbers are optional 54 * 1 => drop receive packets without sequence numbers 55 * LNSMODE - 0 => act as LAC. 56 * 1 => act as LNS. 57 * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder. 58 */ 59enum { 60 PPPOL2TP_SO_DEBUG = 1, 61 PPPOL2TP_SO_RECVSEQ = 2, 62 PPPOL2TP_SO_SENDSEQ = 3, 63 PPPOL2TP_SO_LNSMODE = 4, 64 PPPOL2TP_SO_REORDERTO = 5, 65}; 66 67/* Debug message categories for the DEBUG socket option */ 68enum { 69 PPPOL2TP_MSG_DEBUG = (1 << 0), /* verbose debug (if 70 * compiled in) */ 71 PPPOL2TP_MSG_CONTROL = (1 << 1), /* userspace - kernel 72 * interface */ 73 PPPOL2TP_MSG_SEQ = (1 << 2), /* sequence numbers */ 74 PPPOL2TP_MSG_DATA = (1 << 3), /* data packets */ 75}; 76 77 78 79#endif 80