1e2be04c7SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2607ca46eSDavid Howells /*************************************************************************** 3607ca46eSDavid Howells * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661) 4607ca46eSDavid Howells * 5607ca46eSDavid Howells * This file supplies definitions required by the PPP over L2TP driver 6607ca46eSDavid Howells * (l2tp_ppp.c). All version information wrt this file is located in l2tp_ppp.c 7607ca46eSDavid Howells * 8607ca46eSDavid Howells * License: 9607ca46eSDavid Howells * This program is free software; you can redistribute it and/or 10607ca46eSDavid Howells * modify it under the terms of the GNU General Public License 11607ca46eSDavid Howells * as published by the Free Software Foundation; either version 12607ca46eSDavid Howells * 2 of the License, or (at your option) any later version. 13607ca46eSDavid Howells * 14607ca46eSDavid Howells */ 15607ca46eSDavid Howells 16607ca46eSDavid Howells #ifndef _UAPI__LINUX_IF_PPPOL2TP_H 17607ca46eSDavid Howells #define _UAPI__LINUX_IF_PPPOL2TP_H 18607ca46eSDavid Howells 19607ca46eSDavid Howells #include <linux/types.h> 2005ee5de7SMikko Rapeli #include <linux/in.h> 2105ee5de7SMikko Rapeli #include <linux/in6.h> 2247c3e778SAsbjørn Sloth Tønnesen #include <linux/l2tp.h> 23607ca46eSDavid Howells 24607ca46eSDavid Howells /* Structure used to connect() the socket to a particular tunnel UDP 25607ca46eSDavid Howells * socket over IPv4. 26607ca46eSDavid Howells */ 27607ca46eSDavid Howells struct pppol2tp_addr { 28607ca46eSDavid Howells __kernel_pid_t pid; /* pid that owns the fd. 29607ca46eSDavid Howells * 0 => current */ 30607ca46eSDavid Howells int fd; /* FD of UDP socket to use */ 31607ca46eSDavid Howells 32607ca46eSDavid Howells struct sockaddr_in addr; /* IP address and port to send to */ 33607ca46eSDavid Howells 34607ca46eSDavid Howells __u16 s_tunnel, s_session; /* For matching incoming packets */ 35607ca46eSDavid Howells __u16 d_tunnel, d_session; /* For sending outgoing packets */ 36607ca46eSDavid Howells }; 37607ca46eSDavid Howells 38607ca46eSDavid Howells /* Structure used to connect() the socket to a particular tunnel UDP 39607ca46eSDavid Howells * socket over IPv6. 40607ca46eSDavid Howells */ 41607ca46eSDavid Howells struct pppol2tpin6_addr { 42607ca46eSDavid Howells __kernel_pid_t pid; /* pid that owns the fd. 43607ca46eSDavid Howells * 0 => current */ 44607ca46eSDavid Howells int fd; /* FD of UDP socket to use */ 45607ca46eSDavid Howells 46607ca46eSDavid Howells __u16 s_tunnel, s_session; /* For matching incoming packets */ 47607ca46eSDavid Howells __u16 d_tunnel, d_session; /* For sending outgoing packets */ 48607ca46eSDavid Howells 49607ca46eSDavid Howells struct sockaddr_in6 addr; /* IP address and port to send to */ 50607ca46eSDavid Howells }; 51607ca46eSDavid Howells 52607ca46eSDavid Howells /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32 53607ca46eSDavid Howells * bits. So we need a different sockaddr structure. 54607ca46eSDavid Howells */ 55607ca46eSDavid Howells struct pppol2tpv3_addr { 56607ca46eSDavid Howells __kernel_pid_t pid; /* pid that owns the fd. 57607ca46eSDavid Howells * 0 => current */ 58607ca46eSDavid Howells int fd; /* FD of UDP or IP socket to use */ 59607ca46eSDavid Howells 60607ca46eSDavid Howells struct sockaddr_in addr; /* IP address and port to send to */ 61607ca46eSDavid Howells 62607ca46eSDavid Howells __u32 s_tunnel, s_session; /* For matching incoming packets */ 63607ca46eSDavid Howells __u32 d_tunnel, d_session; /* For sending outgoing packets */ 64607ca46eSDavid Howells }; 65607ca46eSDavid Howells 66607ca46eSDavid Howells struct pppol2tpv3in6_addr { 67607ca46eSDavid Howells __kernel_pid_t pid; /* pid that owns the fd. 68607ca46eSDavid Howells * 0 => current */ 69607ca46eSDavid Howells int fd; /* FD of UDP or IP socket to use */ 70607ca46eSDavid Howells 71607ca46eSDavid Howells __u32 s_tunnel, s_session; /* For matching incoming packets */ 72607ca46eSDavid Howells __u32 d_tunnel, d_session; /* For sending outgoing packets */ 73607ca46eSDavid Howells 74607ca46eSDavid Howells struct sockaddr_in6 addr; /* IP address and port to send to */ 75607ca46eSDavid Howells }; 76607ca46eSDavid Howells 77607ca46eSDavid Howells /* Socket options: 78*eee049c0STom Parkin * DEBUG - bitmask of debug message categories (not used) 79607ca46eSDavid Howells * SENDSEQ - 0 => don't send packets with sequence numbers 80607ca46eSDavid Howells * 1 => send packets with sequence numbers 81607ca46eSDavid Howells * RECVSEQ - 0 => receive packet sequence numbers are optional 82607ca46eSDavid Howells * 1 => drop receive packets without sequence numbers 83607ca46eSDavid Howells * LNSMODE - 0 => act as LAC. 84607ca46eSDavid Howells * 1 => act as LNS. 85607ca46eSDavid Howells * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder. 86607ca46eSDavid Howells */ 87607ca46eSDavid Howells enum { 88607ca46eSDavid Howells PPPOL2TP_SO_DEBUG = 1, 89607ca46eSDavid Howells PPPOL2TP_SO_RECVSEQ = 2, 90607ca46eSDavid Howells PPPOL2TP_SO_SENDSEQ = 3, 91607ca46eSDavid Howells PPPOL2TP_SO_LNSMODE = 4, 92607ca46eSDavid Howells PPPOL2TP_SO_REORDERTO = 5, 93607ca46eSDavid Howells }; 94607ca46eSDavid Howells 9547c3e778SAsbjørn Sloth Tønnesen /* Debug message categories for the DEBUG socket option (deprecated) */ 96607ca46eSDavid Howells enum { 9747c3e778SAsbjørn Sloth Tønnesen PPPOL2TP_MSG_DEBUG = L2TP_MSG_DEBUG, 9847c3e778SAsbjørn Sloth Tønnesen PPPOL2TP_MSG_CONTROL = L2TP_MSG_CONTROL, 9947c3e778SAsbjørn Sloth Tønnesen PPPOL2TP_MSG_SEQ = L2TP_MSG_SEQ, 10047c3e778SAsbjørn Sloth Tønnesen PPPOL2TP_MSG_DATA = L2TP_MSG_DATA, 101607ca46eSDavid Howells }; 102607ca46eSDavid Howells 103607ca46eSDavid Howells 104607ca46eSDavid Howells 105607ca46eSDavid Howells #endif /* _UAPI__LINUX_IF_PPPOL2TP_H */ 106