1/* 2 * L2TP-over-IP socket for L2TPv3. 3 * 4 * Author: James Chapman <jchapman@katalix.com> 5 */ 6 7#ifndef _LINUX_L2TP_H_ 8#define _LINUX_L2TP_H_ 9 10#include <linux/types.h> 11#ifdef __KERNEL__ 12#include <linux/socket.h> 13#include <linux/in.h> 14#else 15#include <netinet/in.h> 16#endif 17 18#define IPPROTO_L2TP 115 19 20/** 21 * struct sockaddr_l2tpip - the sockaddr structure for L2TP-over-IP sockets 22 * @l2tp_family: address family number AF_L2TPIP. 23 * @l2tp_addr: protocol specific address information 24 * @l2tp_conn_id: connection id of tunnel 25 */ 26#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */ 27struct sockaddr_l2tpip { 28 /* The first fields must match struct sockaddr_in */ 29 sa_family_t l2tp_family; /* AF_INET */ 30 __be16 l2tp_unused; /* INET port number (unused) */ 31 struct in_addr l2tp_addr; /* Internet address */ 32 33 __u32 l2tp_conn_id; /* Connection ID of tunnel */ 34 35 /* Pad to size of `struct sockaddr'. */ 36 unsigned char __pad[sizeof(struct sockaddr) - sizeof(sa_family_t) - 37 sizeof(__be16) - sizeof(struct in_addr) - 38 sizeof(__u32)]; 39}; 40 41/***************************************************************************** 42 * NETLINK_GENERIC netlink family. 43 *****************************************************************************/ 44 45/* 46 * Commands. 47 * Valid TLVs of each command are:- 48 * TUNNEL_CREATE - CONN_ID, pw_type, netns, ifname, ipinfo, udpinfo, udpcsum, vlanid 49 * TUNNEL_DELETE - CONN_ID 50 * TUNNEL_MODIFY - CONN_ID, udpcsum 51 * TUNNEL_GETSTATS - CONN_ID, (stats) 52 * TUNNEL_GET - CONN_ID, (...) 53 * SESSION_CREATE - SESSION_ID, PW_TYPE, offset, data_seq, cookie, peer_cookie, offset, l2spec 54 * SESSION_DELETE - SESSION_ID 55 * SESSION_MODIFY - SESSION_ID, data_seq 56 * SESSION_GET - SESSION_ID, (...) 57 * SESSION_GETSTATS - SESSION_ID, (stats) 58 * 59 */ 60enum { 61 L2TP_CMD_NOOP, 62 L2TP_CMD_TUNNEL_CREATE, 63 L2TP_CMD_TUNNEL_DELETE, 64 L2TP_CMD_TUNNEL_MODIFY, 65 L2TP_CMD_TUNNEL_GET, 66 L2TP_CMD_SESSION_CREATE, 67 L2TP_CMD_SESSION_DELETE, 68 L2TP_CMD_SESSION_MODIFY, 69 L2TP_CMD_SESSION_GET, 70 __L2TP_CMD_MAX, 71}; 72 73#define L2TP_CMD_MAX (__L2TP_CMD_MAX - 1) 74 75/* 76 * ATTR types defined for L2TP 77 */ 78enum { 79 L2TP_ATTR_NONE, /* no data */ 80 L2TP_ATTR_PW_TYPE, /* u16, enum l2tp_pwtype */ 81 L2TP_ATTR_ENCAP_TYPE, /* u16, enum l2tp_encap_type */ 82 L2TP_ATTR_OFFSET, /* u16 */ 83 L2TP_ATTR_DATA_SEQ, /* u16 */ 84 L2TP_ATTR_L2SPEC_TYPE, /* u8, enum l2tp_l2spec_type */ 85 L2TP_ATTR_L2SPEC_LEN, /* u8, enum l2tp_l2spec_type */ 86 L2TP_ATTR_PROTO_VERSION, /* u8 */ 87 L2TP_ATTR_IFNAME, /* string */ 88 L2TP_ATTR_CONN_ID, /* u32 */ 89 L2TP_ATTR_PEER_CONN_ID, /* u32 */ 90 L2TP_ATTR_SESSION_ID, /* u32 */ 91 L2TP_ATTR_PEER_SESSION_ID, /* u32 */ 92 L2TP_ATTR_UDP_CSUM, /* u8 */ 93 L2TP_ATTR_VLAN_ID, /* u16 */ 94 L2TP_ATTR_COOKIE, /* 0, 4 or 8 bytes */ 95 L2TP_ATTR_PEER_COOKIE, /* 0, 4 or 8 bytes */ 96 L2TP_ATTR_DEBUG, /* u32 */ 97 L2TP_ATTR_RECV_SEQ, /* u8 */ 98 L2TP_ATTR_SEND_SEQ, /* u8 */ 99 L2TP_ATTR_LNS_MODE, /* u8 */ 100 L2TP_ATTR_USING_IPSEC, /* u8 */ 101 L2TP_ATTR_RECV_TIMEOUT, /* msec */ 102 L2TP_ATTR_FD, /* int */ 103 L2TP_ATTR_IP_SADDR, /* u32 */ 104 L2TP_ATTR_IP_DADDR, /* u32 */ 105 L2TP_ATTR_UDP_SPORT, /* u16 */ 106 L2TP_ATTR_UDP_DPORT, /* u16 */ 107 L2TP_ATTR_MTU, /* u16 */ 108 L2TP_ATTR_MRU, /* u16 */ 109 L2TP_ATTR_STATS, /* nested */ 110 __L2TP_ATTR_MAX, 111}; 112 113#define L2TP_ATTR_MAX (__L2TP_ATTR_MAX - 1) 114 115/* Nested in L2TP_ATTR_STATS */ 116enum { 117 L2TP_ATTR_STATS_NONE, /* no data */ 118 L2TP_ATTR_TX_PACKETS, /* u64 */ 119 L2TP_ATTR_TX_BYTES, /* u64 */ 120 L2TP_ATTR_TX_ERRORS, /* u64 */ 121 L2TP_ATTR_RX_PACKETS, /* u64 */ 122 L2TP_ATTR_RX_BYTES, /* u64 */ 123 L2TP_ATTR_RX_SEQ_DISCARDS, /* u64 */ 124 L2TP_ATTR_RX_OOS_PACKETS, /* u64 */ 125 L2TP_ATTR_RX_ERRORS, /* u64 */ 126 __L2TP_ATTR_STATS_MAX, 127}; 128 129#define L2TP_ATTR_STATS_MAX (__L2TP_ATTR_STATS_MAX - 1) 130 131enum l2tp_pwtype { 132 L2TP_PWTYPE_NONE = 0x0000, 133 L2TP_PWTYPE_ETH_VLAN = 0x0004, 134 L2TP_PWTYPE_ETH = 0x0005, 135 L2TP_PWTYPE_PPP = 0x0007, 136 L2TP_PWTYPE_PPP_AC = 0x0008, 137 L2TP_PWTYPE_IP = 0x000b, 138 __L2TP_PWTYPE_MAX 139}; 140 141enum l2tp_l2spec_type { 142 L2TP_L2SPECTYPE_NONE, 143 L2TP_L2SPECTYPE_DEFAULT, 144}; 145 146enum l2tp_encap_type { 147 L2TP_ENCAPTYPE_UDP, 148 L2TP_ENCAPTYPE_IP, 149}; 150 151enum l2tp_seqmode { 152 L2TP_SEQ_NONE = 0, 153 L2TP_SEQ_IP = 1, 154 L2TP_SEQ_ALL = 2, 155}; 156 157/* 158 * NETLINK_GENERIC related info 159 */ 160#define L2TP_GENL_NAME "l2tp" 161#define L2TP_GENL_VERSION 0x1 162 163#endif 164