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