include/linux/l2tp.h

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