/*************************************************************************** * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661) * * This file supplies definitions required by the PPP over L2TP driver * (pppol2tp.c). All version information wrt this file is located in pppol2tp.c * * License: * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. * */ #ifndef __LINUX_IF_PPPOL2TP_H #define __LINUX_IF_PPPOL2TP_H #include <linux/types.h> #ifdef __KERNEL__ #include <linux/in.h> #endif /* Structure used to connect() the socket to a particular tunnel UDP * socket. */ struct pppol2tp_addr { __kernel_pid_t pid; /* pid that owns the fd. * 0 => current */ int fd; /* FD of UDP socket to use */ struct sockaddr_in addr; /* IP address and port to send to */ __u16 s_tunnel, s_session; /* For matching incoming packets */ __u16 d_tunnel, d_session; /* For sending outgoing packets */ }; /* Socket options: * DEBUG - bitmask of debug message categories * SENDSEQ - 0 => don't send packets with sequence numbers * 1 => send packets with sequence numbers * RECVSEQ - 0 => receive packet sequence numbers are optional * 1 => drop receive packets without sequence numbers * LNSMODE - 0 => act as LAC. * 1 => act as LNS. * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder. */ enum { PPPOL2TP_SO_DEBUG = 1, PPPOL2TP_SO_RECVSEQ = 2, PPPOL2TP_SO_SENDSEQ = 3, PPPOL2TP_SO_LNSMODE = 4, PPPOL2TP_SO_REORDERTO = 5, }; /* Debug message categories for the DEBUG socket option */ enum { PPPOL2TP_MSG_DEBUG = (1 << 0), /* verbose debug (if * compiled in) */ PPPOL2TP_MSG_CONTROL = (1 << 1), /* userspace - kernel * interface */ PPPOL2TP_MSG_SEQ = (1 << 2), /* sequence numbers */ PPPOL2TP_MSG_DATA = (1 << 3), /* data packets */ }; #endif