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