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 #include <linux/in.h> 20 #include <linux/in6.h> 21 #include <linux/l2tp.h> 22 23 /* Structure used to connect() the socket to a particular tunnel UDP 24 * socket over IPv4. 25 */ 26 struct pppol2tp_addr { 27 __kernel_pid_t pid; /* pid that owns the fd. 28 * 0 => current */ 29 int fd; /* FD of UDP socket to use */ 30 31 struct sockaddr_in addr; /* IP address and port to send to */ 32 33 __u16 s_tunnel, s_session; /* For matching incoming packets */ 34 __u16 d_tunnel, d_session; /* For sending outgoing packets */ 35 }; 36 37 /* Structure used to connect() the socket to a particular tunnel UDP 38 * socket over IPv6. 39 */ 40 struct pppol2tpin6_addr { 41 __kernel_pid_t pid; /* pid that owns the fd. 42 * 0 => current */ 43 int fd; /* FD of UDP socket to use */ 44 45 __u16 s_tunnel, s_session; /* For matching incoming packets */ 46 __u16 d_tunnel, d_session; /* For sending outgoing packets */ 47 48 struct sockaddr_in6 addr; /* IP address and port to send to */ 49 }; 50 51 /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32 52 * bits. So we need a different sockaddr structure. 53 */ 54 struct pppol2tpv3_addr { 55 __kernel_pid_t pid; /* pid that owns the fd. 56 * 0 => current */ 57 int fd; /* FD of UDP or IP socket to use */ 58 59 struct sockaddr_in addr; /* IP address and port to send to */ 60 61 __u32 s_tunnel, s_session; /* For matching incoming packets */ 62 __u32 d_tunnel, d_session; /* For sending outgoing packets */ 63 }; 64 65 struct pppol2tpv3in6_addr { 66 __kernel_pid_t pid; /* pid that owns the fd. 67 * 0 => current */ 68 int fd; /* FD of UDP or IP socket to use */ 69 70 __u32 s_tunnel, s_session; /* For matching incoming packets */ 71 __u32 d_tunnel, d_session; /* For sending outgoing packets */ 72 73 struct sockaddr_in6 addr; /* IP address and port to send to */ 74 }; 75 76 /* Socket options: 77 * DEBUG - bitmask of debug message categories 78 * SENDSEQ - 0 => don't send packets with sequence numbers 79 * 1 => send packets with sequence numbers 80 * RECVSEQ - 0 => receive packet sequence numbers are optional 81 * 1 => drop receive packets without sequence numbers 82 * LNSMODE - 0 => act as LAC. 83 * 1 => act as LNS. 84 * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder. 85 */ 86 enum { 87 PPPOL2TP_SO_DEBUG = 1, 88 PPPOL2TP_SO_RECVSEQ = 2, 89 PPPOL2TP_SO_SENDSEQ = 3, 90 PPPOL2TP_SO_LNSMODE = 4, 91 PPPOL2TP_SO_REORDERTO = 5, 92 }; 93 94 /* Debug message categories for the DEBUG socket option (deprecated) */ 95 enum { 96 PPPOL2TP_MSG_DEBUG = L2TP_MSG_DEBUG, 97 PPPOL2TP_MSG_CONTROL = L2TP_MSG_CONTROL, 98 PPPOL2TP_MSG_SEQ = L2TP_MSG_SEQ, 99 PPPOL2TP_MSG_DATA = L2TP_MSG_DATA, 100 }; 101 102 103 104 #endif /* _UAPI__LINUX_IF_PPPOL2TP_H */ 105