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 <linux/types.h> 19 20 #ifdef __KERNEL__ 21 #include <linux/in.h> 22 #endif 23 24 /* Structure used to connect() the socket to a particular tunnel UDP 25 * socket. 26 */ 27 struct pppol2tp_addr 28 { 29 __kernel_pid_t pid; /* pid that owns the fd. 30 * 0 => current */ 31 int fd; /* FD of UDP socket to use */ 32 33 struct sockaddr_in addr; /* IP address and port to send to */ 34 35 __u16 s_tunnel, s_session; /* For matching incoming packets */ 36 __u16 d_tunnel, d_session; /* For sending outgoing packets */ 37 }; 38 39 /* Socket options: 40 * DEBUG - bitmask of debug message categories 41 * SENDSEQ - 0 => don't send packets with sequence numbers 42 * 1 => send packets with sequence numbers 43 * RECVSEQ - 0 => receive packet sequence numbers are optional 44 * 1 => drop receive packets without sequence numbers 45 * LNSMODE - 0 => act as LAC. 46 * 1 => act as LNS. 47 * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder. 48 */ 49 enum { 50 PPPOL2TP_SO_DEBUG = 1, 51 PPPOL2TP_SO_RECVSEQ = 2, 52 PPPOL2TP_SO_SENDSEQ = 3, 53 PPPOL2TP_SO_LNSMODE = 4, 54 PPPOL2TP_SO_REORDERTO = 5, 55 }; 56 57 /* Debug message categories for the DEBUG socket option */ 58 enum { 59 PPPOL2TP_MSG_DEBUG = (1 << 0), /* verbose debug (if 60 * compiled in) */ 61 PPPOL2TP_MSG_CONTROL = (1 << 1), /* userspace - kernel 62 * interface */ 63 PPPOL2TP_MSG_SEQ = (1 << 2), /* sequence numbers */ 64 PPPOL2TP_MSG_DATA = (1 << 3), /* data packets */ 65 }; 66 67 68 69 #endif 70