1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2*4882a593Smuzhiyun /*************************************************************************** 3*4882a593Smuzhiyun * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661) 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * This file supplies definitions required by the PPP over L2TP driver 6*4882a593Smuzhiyun * (l2tp_ppp.c). All version information wrt this file is located in l2tp_ppp.c 7*4882a593Smuzhiyun * 8*4882a593Smuzhiyun * License: 9*4882a593Smuzhiyun * This program is free software; you can redistribute it and/or 10*4882a593Smuzhiyun * modify it under the terms of the GNU General Public License 11*4882a593Smuzhiyun * as published by the Free Software Foundation; either version 12*4882a593Smuzhiyun * 2 of the License, or (at your option) any later version. 13*4882a593Smuzhiyun * 14*4882a593Smuzhiyun */ 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun #ifndef _UAPI__LINUX_IF_PPPOL2TP_H 17*4882a593Smuzhiyun #define _UAPI__LINUX_IF_PPPOL2TP_H 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun #include <linux/types.h> 20*4882a593Smuzhiyun #include <linux/in.h> 21*4882a593Smuzhiyun #include <linux/in6.h> 22*4882a593Smuzhiyun #include <linux/l2tp.h> 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun /* Structure used to connect() the socket to a particular tunnel UDP 25*4882a593Smuzhiyun * socket over IPv4. 26*4882a593Smuzhiyun */ 27*4882a593Smuzhiyun struct pppol2tp_addr { 28*4882a593Smuzhiyun __kernel_pid_t pid; /* pid that owns the fd. 29*4882a593Smuzhiyun * 0 => current */ 30*4882a593Smuzhiyun int fd; /* FD of UDP socket to use */ 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun struct sockaddr_in addr; /* IP address and port to send to */ 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun __u16 s_tunnel, s_session; /* For matching incoming packets */ 35*4882a593Smuzhiyun __u16 d_tunnel, d_session; /* For sending outgoing packets */ 36*4882a593Smuzhiyun }; 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun /* Structure used to connect() the socket to a particular tunnel UDP 39*4882a593Smuzhiyun * socket over IPv6. 40*4882a593Smuzhiyun */ 41*4882a593Smuzhiyun struct pppol2tpin6_addr { 42*4882a593Smuzhiyun __kernel_pid_t pid; /* pid that owns the fd. 43*4882a593Smuzhiyun * 0 => current */ 44*4882a593Smuzhiyun int fd; /* FD of UDP socket to use */ 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun __u16 s_tunnel, s_session; /* For matching incoming packets */ 47*4882a593Smuzhiyun __u16 d_tunnel, d_session; /* For sending outgoing packets */ 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun struct sockaddr_in6 addr; /* IP address and port to send to */ 50*4882a593Smuzhiyun }; 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32 53*4882a593Smuzhiyun * bits. So we need a different sockaddr structure. 54*4882a593Smuzhiyun */ 55*4882a593Smuzhiyun struct pppol2tpv3_addr { 56*4882a593Smuzhiyun __kernel_pid_t pid; /* pid that owns the fd. 57*4882a593Smuzhiyun * 0 => current */ 58*4882a593Smuzhiyun int fd; /* FD of UDP or IP socket to use */ 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun struct sockaddr_in addr; /* IP address and port to send to */ 61*4882a593Smuzhiyun 62*4882a593Smuzhiyun __u32 s_tunnel, s_session; /* For matching incoming packets */ 63*4882a593Smuzhiyun __u32 d_tunnel, d_session; /* For sending outgoing packets */ 64*4882a593Smuzhiyun }; 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun struct pppol2tpv3in6_addr { 67*4882a593Smuzhiyun __kernel_pid_t pid; /* pid that owns the fd. 68*4882a593Smuzhiyun * 0 => current */ 69*4882a593Smuzhiyun int fd; /* FD of UDP or IP socket to use */ 70*4882a593Smuzhiyun 71*4882a593Smuzhiyun __u32 s_tunnel, s_session; /* For matching incoming packets */ 72*4882a593Smuzhiyun __u32 d_tunnel, d_session; /* For sending outgoing packets */ 73*4882a593Smuzhiyun 74*4882a593Smuzhiyun struct sockaddr_in6 addr; /* IP address and port to send to */ 75*4882a593Smuzhiyun }; 76*4882a593Smuzhiyun 77*4882a593Smuzhiyun /* Socket options: 78*4882a593Smuzhiyun * DEBUG - bitmask of debug message categories (not used) 79*4882a593Smuzhiyun * SENDSEQ - 0 => don't send packets with sequence numbers 80*4882a593Smuzhiyun * 1 => send packets with sequence numbers 81*4882a593Smuzhiyun * RECVSEQ - 0 => receive packet sequence numbers are optional 82*4882a593Smuzhiyun * 1 => drop receive packets without sequence numbers 83*4882a593Smuzhiyun * LNSMODE - 0 => act as LAC. 84*4882a593Smuzhiyun * 1 => act as LNS. 85*4882a593Smuzhiyun * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder. 86*4882a593Smuzhiyun */ 87*4882a593Smuzhiyun enum { 88*4882a593Smuzhiyun PPPOL2TP_SO_DEBUG = 1, 89*4882a593Smuzhiyun PPPOL2TP_SO_RECVSEQ = 2, 90*4882a593Smuzhiyun PPPOL2TP_SO_SENDSEQ = 3, 91*4882a593Smuzhiyun PPPOL2TP_SO_LNSMODE = 4, 92*4882a593Smuzhiyun PPPOL2TP_SO_REORDERTO = 5, 93*4882a593Smuzhiyun }; 94*4882a593Smuzhiyun 95*4882a593Smuzhiyun /* Debug message categories for the DEBUG socket option (deprecated) */ 96*4882a593Smuzhiyun enum { 97*4882a593Smuzhiyun PPPOL2TP_MSG_DEBUG = L2TP_MSG_DEBUG, 98*4882a593Smuzhiyun PPPOL2TP_MSG_CONTROL = L2TP_MSG_CONTROL, 99*4882a593Smuzhiyun PPPOL2TP_MSG_SEQ = L2TP_MSG_SEQ, 100*4882a593Smuzhiyun PPPOL2TP_MSG_DATA = L2TP_MSG_DATA, 101*4882a593Smuzhiyun }; 102*4882a593Smuzhiyun 103*4882a593Smuzhiyun 104*4882a593Smuzhiyun 105*4882a593Smuzhiyun #endif /* _UAPI__LINUX_IF_PPPOL2TP_H */ 106