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 #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