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 <linux/socket.h> 12 #ifdef __KERNEL__ 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) */ 27 struct sockaddr_l2tpip { 28 /* The first fields must match struct sockaddr_in */ 29 __kernel_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) - 37 sizeof(__kernel_sa_family_t) - 38 sizeof(__be16) - sizeof(struct in_addr) - 39 sizeof(__u32)]; 40 }; 41 42 /***************************************************************************** 43 * NETLINK_GENERIC netlink family. 44 *****************************************************************************/ 45 46 /* 47 * Commands. 48 * Valid TLVs of each command are:- 49 * TUNNEL_CREATE - CONN_ID, pw_type, netns, ifname, ipinfo, udpinfo, udpcsum, vlanid 50 * TUNNEL_DELETE - CONN_ID 51 * TUNNEL_MODIFY - CONN_ID, udpcsum 52 * TUNNEL_GETSTATS - CONN_ID, (stats) 53 * TUNNEL_GET - CONN_ID, (...) 54 * SESSION_CREATE - SESSION_ID, PW_TYPE, offset, data_seq, cookie, peer_cookie, offset, l2spec 55 * SESSION_DELETE - SESSION_ID 56 * SESSION_MODIFY - SESSION_ID, data_seq 57 * SESSION_GET - SESSION_ID, (...) 58 * SESSION_GETSTATS - SESSION_ID, (stats) 59 * 60 */ 61 enum { 62 L2TP_CMD_NOOP, 63 L2TP_CMD_TUNNEL_CREATE, 64 L2TP_CMD_TUNNEL_DELETE, 65 L2TP_CMD_TUNNEL_MODIFY, 66 L2TP_CMD_TUNNEL_GET, 67 L2TP_CMD_SESSION_CREATE, 68 L2TP_CMD_SESSION_DELETE, 69 L2TP_CMD_SESSION_MODIFY, 70 L2TP_CMD_SESSION_GET, 71 __L2TP_CMD_MAX, 72 }; 73 74 #define L2TP_CMD_MAX (__L2TP_CMD_MAX - 1) 75 76 /* 77 * ATTR types defined for L2TP 78 */ 79 enum { 80 L2TP_ATTR_NONE, /* no data */ 81 L2TP_ATTR_PW_TYPE, /* u16, enum l2tp_pwtype */ 82 L2TP_ATTR_ENCAP_TYPE, /* u16, enum l2tp_encap_type */ 83 L2TP_ATTR_OFFSET, /* u16 */ 84 L2TP_ATTR_DATA_SEQ, /* u16 */ 85 L2TP_ATTR_L2SPEC_TYPE, /* u8, enum l2tp_l2spec_type */ 86 L2TP_ATTR_L2SPEC_LEN, /* u8, enum l2tp_l2spec_type */ 87 L2TP_ATTR_PROTO_VERSION, /* u8 */ 88 L2TP_ATTR_IFNAME, /* string */ 89 L2TP_ATTR_CONN_ID, /* u32 */ 90 L2TP_ATTR_PEER_CONN_ID, /* u32 */ 91 L2TP_ATTR_SESSION_ID, /* u32 */ 92 L2TP_ATTR_PEER_SESSION_ID, /* u32 */ 93 L2TP_ATTR_UDP_CSUM, /* u8 */ 94 L2TP_ATTR_VLAN_ID, /* u16 */ 95 L2TP_ATTR_COOKIE, /* 0, 4 or 8 bytes */ 96 L2TP_ATTR_PEER_COOKIE, /* 0, 4 or 8 bytes */ 97 L2TP_ATTR_DEBUG, /* u32 */ 98 L2TP_ATTR_RECV_SEQ, /* u8 */ 99 L2TP_ATTR_SEND_SEQ, /* u8 */ 100 L2TP_ATTR_LNS_MODE, /* u8 */ 101 L2TP_ATTR_USING_IPSEC, /* u8 */ 102 L2TP_ATTR_RECV_TIMEOUT, /* msec */ 103 L2TP_ATTR_FD, /* int */ 104 L2TP_ATTR_IP_SADDR, /* u32 */ 105 L2TP_ATTR_IP_DADDR, /* u32 */ 106 L2TP_ATTR_UDP_SPORT, /* u16 */ 107 L2TP_ATTR_UDP_DPORT, /* u16 */ 108 L2TP_ATTR_MTU, /* u16 */ 109 L2TP_ATTR_MRU, /* u16 */ 110 L2TP_ATTR_STATS, /* nested */ 111 __L2TP_ATTR_MAX, 112 }; 113 114 #define L2TP_ATTR_MAX (__L2TP_ATTR_MAX - 1) 115 116 /* Nested in L2TP_ATTR_STATS */ 117 enum { 118 L2TP_ATTR_STATS_NONE, /* no data */ 119 L2TP_ATTR_TX_PACKETS, /* u64 */ 120 L2TP_ATTR_TX_BYTES, /* u64 */ 121 L2TP_ATTR_TX_ERRORS, /* u64 */ 122 L2TP_ATTR_RX_PACKETS, /* u64 */ 123 L2TP_ATTR_RX_BYTES, /* u64 */ 124 L2TP_ATTR_RX_SEQ_DISCARDS, /* u64 */ 125 L2TP_ATTR_RX_OOS_PACKETS, /* u64 */ 126 L2TP_ATTR_RX_ERRORS, /* u64 */ 127 __L2TP_ATTR_STATS_MAX, 128 }; 129 130 #define L2TP_ATTR_STATS_MAX (__L2TP_ATTR_STATS_MAX - 1) 131 132 enum l2tp_pwtype { 133 L2TP_PWTYPE_NONE = 0x0000, 134 L2TP_PWTYPE_ETH_VLAN = 0x0004, 135 L2TP_PWTYPE_ETH = 0x0005, 136 L2TP_PWTYPE_PPP = 0x0007, 137 L2TP_PWTYPE_PPP_AC = 0x0008, 138 L2TP_PWTYPE_IP = 0x000b, 139 __L2TP_PWTYPE_MAX 140 }; 141 142 enum l2tp_l2spec_type { 143 L2TP_L2SPECTYPE_NONE, 144 L2TP_L2SPECTYPE_DEFAULT, 145 }; 146 147 enum l2tp_encap_type { 148 L2TP_ENCAPTYPE_UDP, 149 L2TP_ENCAPTYPE_IP, 150 }; 151 152 enum l2tp_seqmode { 153 L2TP_SEQ_NONE = 0, 154 L2TP_SEQ_IP = 1, 155 L2TP_SEQ_ALL = 2, 156 }; 157 158 /* 159 * NETLINK_GENERIC related info 160 */ 161 #define L2TP_GENL_NAME "l2tp" 162 #define L2TP_GENL_VERSION 0x1 163 164 #endif 165