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 * (l2tp_ppp.c). All version information wrt this file is located in l2tp_ppp.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 _UAPI__LINUX_IF_PPPOL2TP_H 16 #define _UAPI__LINUX_IF_PPPOL2TP_H 17 18 #include <linux/types.h> 19 20 #include <linux/l2tp.h> 21 22 /* Structure used to connect() the socket to a particular tunnel UDP 23 * socket over IPv4. 24 */ 25 struct pppol2tp_addr { 26 __kernel_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 /* Structure used to connect() the socket to a particular tunnel UDP 37 * socket over IPv6. 38 */ 39 struct pppol2tpin6_addr { 40 __kernel_pid_t pid; /* pid that owns the fd. 41 * 0 => current */ 42 int fd; /* FD of UDP socket to use */ 43 44 __u16 s_tunnel, s_session; /* For matching incoming packets */ 45 __u16 d_tunnel, d_session; /* For sending outgoing packets */ 46 47 struct sockaddr_in6 addr; /* IP address and port to send to */ 48 }; 49 50 /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32 51 * bits. So we need a different sockaddr structure. 52 */ 53 struct pppol2tpv3_addr { 54 __kernel_pid_t pid; /* pid that owns the fd. 55 * 0 => current */ 56 int fd; /* FD of UDP or IP socket to use */ 57 58 struct sockaddr_in addr; /* IP address and port to send to */ 59 60 __u32 s_tunnel, s_session; /* For matching incoming packets */ 61 __u32 d_tunnel, d_session; /* For sending outgoing packets */ 62 }; 63 64 struct pppol2tpv3in6_addr { 65 __kernel_pid_t pid; /* pid that owns the fd. 66 * 0 => current */ 67 int fd; /* FD of UDP or IP socket to use */ 68 69 __u32 s_tunnel, s_session; /* For matching incoming packets */ 70 __u32 d_tunnel, d_session; /* For sending outgoing packets */ 71 72 struct sockaddr_in6 addr; /* IP address and port to send to */ 73 }; 74 75 /* Socket options: 76 * DEBUG - bitmask of debug message categories 77 * SENDSEQ - 0 => don't send packets with sequence numbers 78 * 1 => send packets with sequence numbers 79 * RECVSEQ - 0 => receive packet sequence numbers are optional 80 * 1 => drop receive packets without sequence numbers 81 * LNSMODE - 0 => act as LAC. 82 * 1 => act as LNS. 83 * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder. 84 */ 85 enum { 86 PPPOL2TP_SO_DEBUG = 1, 87 PPPOL2TP_SO_RECVSEQ = 2, 88 PPPOL2TP_SO_SENDSEQ = 3, 89 PPPOL2TP_SO_LNSMODE = 4, 90 PPPOL2TP_SO_REORDERTO = 5, 91 }; 92 93 /* Debug message categories for the DEBUG socket option (deprecated) */ 94 enum { 95 PPPOL2TP_MSG_DEBUG = L2TP_MSG_DEBUG, 96 PPPOL2TP_MSG_CONTROL = L2TP_MSG_CONTROL, 97 PPPOL2TP_MSG_SEQ = L2TP_MSG_SEQ, 98 PPPOL2TP_MSG_DATA = L2TP_MSG_DATA, 99 }; 100 101 102 103 #endif /* _UAPI__LINUX_IF_PPPOL2TP_H */ 104