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 #include <linux/in6.h> 15 #else 16 #include <netinet/in.h> 17 #endif 18 19 #define IPPROTO_L2TP 115 20 21 /** 22 * struct sockaddr_l2tpip - the sockaddr structure for L2TP-over-IP sockets 23 * @l2tp_family: address family number AF_L2TPIP. 24 * @l2tp_addr: protocol specific address information 25 * @l2tp_conn_id: connection id of tunnel 26 */ 27 #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */ 28 struct sockaddr_l2tpip { 29 /* The first fields must match struct sockaddr_in */ 30 __kernel_sa_family_t l2tp_family; /* AF_INET */ 31 __be16 l2tp_unused; /* INET port number (unused) */ 32 struct in_addr l2tp_addr; /* Internet address */ 33 34 __u32 l2tp_conn_id; /* Connection ID of tunnel */ 35 36 /* Pad to size of `struct sockaddr'. */ 37 unsigned char __pad[sizeof(struct sockaddr) - 38 sizeof(__kernel_sa_family_t) - 39 sizeof(__be16) - sizeof(struct in_addr) - 40 sizeof(__u32)]; 41 }; 42 43 /** 44 * struct sockaddr_l2tpip6 - the sockaddr structure for L2TP-over-IPv6 sockets 45 * @l2tp_family: address family number AF_L2TPIP. 46 * @l2tp_addr: protocol specific address information 47 * @l2tp_conn_id: connection id of tunnel 48 */ 49 struct sockaddr_l2tpip6 { 50 /* The first fields must match struct sockaddr_in6 */ 51 __kernel_sa_family_t l2tp_family; /* AF_INET6 */ 52 __be16 l2tp_unused; /* INET port number (unused) */ 53 __be32 l2tp_flowinfo; /* IPv6 flow information */ 54 struct in6_addr l2tp_addr; /* IPv6 address */ 55 __u32 l2tp_scope_id; /* scope id (new in RFC2553) */ 56 __u32 l2tp_conn_id; /* Connection ID of tunnel */ 57 }; 58 59 /***************************************************************************** 60 * NETLINK_GENERIC netlink family. 61 *****************************************************************************/ 62 63 /* 64 * Commands. 65 * Valid TLVs of each command are:- 66 * TUNNEL_CREATE - CONN_ID, pw_type, netns, ifname, ipinfo, udpinfo, udpcsum, vlanid 67 * TUNNEL_DELETE - CONN_ID 68 * TUNNEL_MODIFY - CONN_ID, udpcsum 69 * TUNNEL_GETSTATS - CONN_ID, (stats) 70 * TUNNEL_GET - CONN_ID, (...) 71 * SESSION_CREATE - SESSION_ID, PW_TYPE, offset, data_seq, cookie, peer_cookie, offset, l2spec 72 * SESSION_DELETE - SESSION_ID 73 * SESSION_MODIFY - SESSION_ID, data_seq 74 * SESSION_GET - SESSION_ID, (...) 75 * SESSION_GETSTATS - SESSION_ID, (stats) 76 * 77 */ 78 enum { 79 L2TP_CMD_NOOP, 80 L2TP_CMD_TUNNEL_CREATE, 81 L2TP_CMD_TUNNEL_DELETE, 82 L2TP_CMD_TUNNEL_MODIFY, 83 L2TP_CMD_TUNNEL_GET, 84 L2TP_CMD_SESSION_CREATE, 85 L2TP_CMD_SESSION_DELETE, 86 L2TP_CMD_SESSION_MODIFY, 87 L2TP_CMD_SESSION_GET, 88 __L2TP_CMD_MAX, 89 }; 90 91 #define L2TP_CMD_MAX (__L2TP_CMD_MAX - 1) 92 93 /* 94 * ATTR types defined for L2TP 95 */ 96 enum { 97 L2TP_ATTR_NONE, /* no data */ 98 L2TP_ATTR_PW_TYPE, /* u16, enum l2tp_pwtype */ 99 L2TP_ATTR_ENCAP_TYPE, /* u16, enum l2tp_encap_type */ 100 L2TP_ATTR_OFFSET, /* u16 */ 101 L2TP_ATTR_DATA_SEQ, /* u16 */ 102 L2TP_ATTR_L2SPEC_TYPE, /* u8, enum l2tp_l2spec_type */ 103 L2TP_ATTR_L2SPEC_LEN, /* u8, enum l2tp_l2spec_type */ 104 L2TP_ATTR_PROTO_VERSION, /* u8 */ 105 L2TP_ATTR_IFNAME, /* string */ 106 L2TP_ATTR_CONN_ID, /* u32 */ 107 L2TP_ATTR_PEER_CONN_ID, /* u32 */ 108 L2TP_ATTR_SESSION_ID, /* u32 */ 109 L2TP_ATTR_PEER_SESSION_ID, /* u32 */ 110 L2TP_ATTR_UDP_CSUM, /* u8 */ 111 L2TP_ATTR_VLAN_ID, /* u16 */ 112 L2TP_ATTR_COOKIE, /* 0, 4 or 8 bytes */ 113 L2TP_ATTR_PEER_COOKIE, /* 0, 4 or 8 bytes */ 114 L2TP_ATTR_DEBUG, /* u32 */ 115 L2TP_ATTR_RECV_SEQ, /* u8 */ 116 L2TP_ATTR_SEND_SEQ, /* u8 */ 117 L2TP_ATTR_LNS_MODE, /* u8 */ 118 L2TP_ATTR_USING_IPSEC, /* u8 */ 119 L2TP_ATTR_RECV_TIMEOUT, /* msec */ 120 L2TP_ATTR_FD, /* int */ 121 L2TP_ATTR_IP_SADDR, /* u32 */ 122 L2TP_ATTR_IP_DADDR, /* u32 */ 123 L2TP_ATTR_UDP_SPORT, /* u16 */ 124 L2TP_ATTR_UDP_DPORT, /* u16 */ 125 L2TP_ATTR_MTU, /* u16 */ 126 L2TP_ATTR_MRU, /* u16 */ 127 L2TP_ATTR_STATS, /* nested */ 128 L2TP_ATTR_IP6_SADDR, /* struct in6_addr */ 129 L2TP_ATTR_IP6_DADDR, /* struct in6_addr */ 130 __L2TP_ATTR_MAX, 131 }; 132 133 #define L2TP_ATTR_MAX (__L2TP_ATTR_MAX - 1) 134 135 /* Nested in L2TP_ATTR_STATS */ 136 enum { 137 L2TP_ATTR_STATS_NONE, /* no data */ 138 L2TP_ATTR_TX_PACKETS, /* u64 */ 139 L2TP_ATTR_TX_BYTES, /* u64 */ 140 L2TP_ATTR_TX_ERRORS, /* u64 */ 141 L2TP_ATTR_RX_PACKETS, /* u64 */ 142 L2TP_ATTR_RX_BYTES, /* u64 */ 143 L2TP_ATTR_RX_SEQ_DISCARDS, /* u64 */ 144 L2TP_ATTR_RX_OOS_PACKETS, /* u64 */ 145 L2TP_ATTR_RX_ERRORS, /* u64 */ 146 __L2TP_ATTR_STATS_MAX, 147 }; 148 149 #define L2TP_ATTR_STATS_MAX (__L2TP_ATTR_STATS_MAX - 1) 150 151 enum l2tp_pwtype { 152 L2TP_PWTYPE_NONE = 0x0000, 153 L2TP_PWTYPE_ETH_VLAN = 0x0004, 154 L2TP_PWTYPE_ETH = 0x0005, 155 L2TP_PWTYPE_PPP = 0x0007, 156 L2TP_PWTYPE_PPP_AC = 0x0008, 157 L2TP_PWTYPE_IP = 0x000b, 158 __L2TP_PWTYPE_MAX 159 }; 160 161 enum l2tp_l2spec_type { 162 L2TP_L2SPECTYPE_NONE, 163 L2TP_L2SPECTYPE_DEFAULT, 164 }; 165 166 enum l2tp_encap_type { 167 L2TP_ENCAPTYPE_UDP, 168 L2TP_ENCAPTYPE_IP, 169 }; 170 171 enum l2tp_seqmode { 172 L2TP_SEQ_NONE = 0, 173 L2TP_SEQ_IP = 1, 174 L2TP_SEQ_ALL = 2, 175 }; 176 177 /* 178 * NETLINK_GENERIC related info 179 */ 180 #define L2TP_GENL_NAME "l2tp" 181 #define L2TP_GENL_VERSION 0x1 182 183 #endif 184