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