1 /* 2 * L2TP-over-IP socket for L2TPv3. 3 * 4 * Author: James Chapman <jchapman (at) 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 * struct sockaddr_l2tpip6 - the sockaddr structure for L2TP-over-IPv6 sockets 40 * @l2tp_family: address family number AF_L2TPIP. 41 * @l2tp_addr: protocol specific address information 42 * @l2tp_conn_id: connection id of tunnel 43 */ 44 struct sockaddr_l2tpip6 { 45 /* The first fields must match struct sockaddr_in6 */ 46 __kernel_sa_family_t l2tp_family; /* AF_INET6 */ 47 __be16 l2tp_unused; /* INET port number (unused) */ 48 __be32 l2tp_flowinfo; /* IPv6 flow information */ 49 struct in6_addr l2tp_addr; /* IPv6 address */ 50 __u32 l2tp_scope_id; /* scope id (new in RFC2553) */ 51 __u32 l2tp_conn_id; /* Connection ID of tunnel */ 52 }; 53 54 /***************************************************************************** 55 * NETLINK_GENERIC netlink family. 56 *****************************************************************************/ 57 58 /* 59 * Commands. 60 * Valid TLVs of each command are:- 61 * TUNNEL_CREATE - CONN_ID, pw_type, netns, ifname, ipinfo, udpinfo, udpcsum, vlanid 62 * TUNNEL_DELETE - CONN_ID 63 * TUNNEL_MODIFY - CONN_ID, udpcsum 64 * TUNNEL_GETSTATS - CONN_ID, (stats) 65 * TUNNEL_GET - CONN_ID, (...) 66 * SESSION_CREATE - SESSION_ID, PW_TYPE, offset, data_seq, cookie, peer_cookie, offset, l2spec 67 * SESSION_DELETE - SESSION_ID 68 * SESSION_MODIFY - SESSION_ID, data_seq 69 * SESSION_GET - SESSION_ID, (...) 70 * SESSION_GETSTATS - SESSION_ID, (stats) 71 * 72 */ 73 enum { 74 L2TP_CMD_NOOP, 75 L2TP_CMD_TUNNEL_CREATE, 76 L2TP_CMD_TUNNEL_DELETE, 77 L2TP_CMD_TUNNEL_MODIFY, 78 L2TP_CMD_TUNNEL_GET, 79 L2TP_CMD_SESSION_CREATE, 80 L2TP_CMD_SESSION_DELETE, 81 L2TP_CMD_SESSION_MODIFY, 82 L2TP_CMD_SESSION_GET, 83 __L2TP_CMD_MAX, 84 }; 85 86 #define L2TP_CMD_MAX (__L2TP_CMD_MAX - 1) 87 88 /* 89 * ATTR types defined for L2TP 90 */ 91 enum { 92 L2TP_ATTR_NONE, /* no data */ 93 L2TP_ATTR_PW_TYPE, /* u16, enum l2tp_pwtype */ 94 L2TP_ATTR_ENCAP_TYPE, /* u16, enum l2tp_encap_type */ 95 L2TP_ATTR_OFFSET, /* u16 */ 96 L2TP_ATTR_DATA_SEQ, /* u16 */ 97 L2TP_ATTR_L2SPEC_TYPE, /* u8, enum l2tp_l2spec_type */ 98 L2TP_ATTR_L2SPEC_LEN, /* u8, enum l2tp_l2spec_type */ 99 L2TP_ATTR_PROTO_VERSION, /* u8 */ 100 L2TP_ATTR_IFNAME, /* string */ 101 L2TP_ATTR_CONN_ID, /* u32 */ 102 L2TP_ATTR_PEER_CONN_ID, /* u32 */ 103 L2TP_ATTR_SESSION_ID, /* u32 */ 104 L2TP_ATTR_PEER_SESSION_ID, /* u32 */ 105 L2TP_ATTR_UDP_CSUM, /* u8 */ 106 L2TP_ATTR_VLAN_ID, /* u16 */ 107 L2TP_ATTR_COOKIE, /* 0, 4 or 8 bytes */ 108 L2TP_ATTR_PEER_COOKIE, /* 0, 4 or 8 bytes */ 109 L2TP_ATTR_DEBUG, /* u32 */ 110 L2TP_ATTR_RECV_SEQ, /* u8 */ 111 L2TP_ATTR_SEND_SEQ, /* u8 */ 112 L2TP_ATTR_LNS_MODE, /* u8 */ 113 L2TP_ATTR_USING_IPSEC, /* u8 */ 114 L2TP_ATTR_RECV_TIMEOUT, /* msec */ 115 L2TP_ATTR_FD, /* int */ 116 L2TP_ATTR_IP_SADDR, /* u32 */ 117 L2TP_ATTR_IP_DADDR, /* u32 */ 118 L2TP_ATTR_UDP_SPORT, /* u16 */ 119 L2TP_ATTR_UDP_DPORT, /* u16 */ 120 L2TP_ATTR_MTU, /* u16 */ 121 L2TP_ATTR_MRU, /* u16 */ 122 L2TP_ATTR_STATS, /* nested */ 123 L2TP_ATTR_IP6_SADDR, /* struct in6_addr */ 124 L2TP_ATTR_IP6_DADDR, /* struct in6_addr */ 125 L2TP_ATTR_UDP_ZERO_CSUM6_TX, /* u8 */ 126 L2TP_ATTR_UDP_ZERO_CSUM6_RX, /* u8 */ 127 __L2TP_ATTR_MAX, 128 }; 129 130 #define L2TP_ATTR_MAX (__L2TP_ATTR_MAX - 1) 131 132 /* Nested in L2TP_ATTR_STATS */ 133 enum { 134 L2TP_ATTR_STATS_NONE, /* no data */ 135 L2TP_ATTR_TX_PACKETS, /* u64 */ 136 L2TP_ATTR_TX_BYTES, /* u64 */ 137 L2TP_ATTR_TX_ERRORS, /* u64 */ 138 L2TP_ATTR_RX_PACKETS, /* u64 */ 139 L2TP_ATTR_RX_BYTES, /* u64 */ 140 L2TP_ATTR_RX_SEQ_DISCARDS, /* u64 */ 141 L2TP_ATTR_RX_OOS_PACKETS, /* u64 */ 142 L2TP_ATTR_RX_ERRORS, /* u64 */ 143 __L2TP_ATTR_STATS_MAX, 144 }; 145 146 #define L2TP_ATTR_STATS_MAX (__L2TP_ATTR_STATS_MAX - 1) 147 148 enum l2tp_pwtype { 149 L2TP_PWTYPE_NONE = 0x0000, 150 L2TP_PWTYPE_ETH_VLAN = 0x0004, 151 L2TP_PWTYPE_ETH = 0x0005, 152 L2TP_PWTYPE_PPP = 0x0007, 153 L2TP_PWTYPE_PPP_AC = 0x0008, 154 L2TP_PWTYPE_IP = 0x000b, 155 __L2TP_PWTYPE_MAX 156 }; 157 158 enum l2tp_l2spec_type { 159 L2TP_L2SPECTYPE_NONE, 160 L2TP_L2SPECTYPE_DEFAULT, 161 }; 162 163 enum l2tp_encap_type { 164 L2TP_ENCAPTYPE_UDP, 165 L2TP_ENCAPTYPE_IP, 166 }; 167 168 enum l2tp_seqmode { 169 L2TP_SEQ_NONE = 0, 170 L2TP_SEQ_IP = 1, 171 L2TP_SEQ_ALL = 2, 172 }; 173 174 /* 175 * NETLINK_GENERIC related info 176 */ 177 #define L2TP_GENL_NAME "l2tp" 178 #define L2TP_GENL_VERSION 0x1 179 #define L2TP_GENL_MCGROUP "l2tp" 180 181 #endif /* _LINUX_L2TP_H_ */ 182
