include/uapi/linux/l2tp.h

   1 /*
   2  * L2TP-over-IP socket for L2TPv3.
   3  *
   4  * Author: James Chapman <jchapman@katalix.com>
   5  */
   6
   7 #ifndef _UAPI_LINUX_L2TP_H_
   8 #define _UAPI_LINUX_L2TP_H_
   9
  10 #include <linux/types.h>
  11 #include <linux/socket.h>
  12 #include <linux/in.h>
  13 #include <linux/in6.h>
  14
  15 #define IPPROTO_L2TP            115
  16
  17 /**
  18  * struct sockaddr_l2tpip - the sockaddr structure for L2TP-over-IP sockets
  19  * @l2tp_family:  address family number AF_L2TPIP.
  20  * @l2tp_addr:    protocol specific address information
  21  * @l2tp_conn_id: connection id of tunnel
  22  */
  23 #define __SOCK_SIZE__   16              /* sizeof(struct sockaddr)      */
  24 struct sockaddr_l2tpip {
  25         /* The first fields must match struct sockaddr_in */
  26         __kernel_sa_family_t l2tp_family; /* AF_INET */
  27         __be16          l2tp_unused;    /* INET port number (unused) */
  28         struct in_addr  l2tp_addr;      /* Internet address */
  29
  30         __u32           l2tp_conn_id;   /* Connection ID of tunnel */
  31
  32         /* Pad to size of `struct sockaddr'. */
  33         unsigned char   __pad[__SOCK_SIZE__ -
  34                               sizeof(__kernel_sa_family_t) -
  35                               sizeof(__be16) - sizeof(struct in_addr) -
  36                               sizeof(__u32)];
  37 };
  38
  39 /**
  40  * struct sockaddr_l2tpip6 - the sockaddr structure for L2TP-over-IPv6 sockets
  41  * @l2tp_family:  address family number AF_L2TPIP.
  42  * @l2tp_addr:    protocol specific address information
  43  * @l2tp_conn_id: connection id of tunnel
  44  */
  45 struct sockaddr_l2tpip6 {
  46         /* The first fields must match struct sockaddr_in6 */
  47         __kernel_sa_family_t l2tp_family; /* AF_INET6 */
  48         __be16          l2tp_unused;    /* INET port number (unused) */
  49         __be32          l2tp_flowinfo;  /* IPv6 flow information */
  50         struct in6_addr l2tp_addr;      /* IPv6 address */
  51         __u32           l2tp_scope_id;  /* scope id (new in RFC2553) */
  52         __u32           l2tp_conn_id;   /* Connection ID of tunnel */
  53 };
  54
  55 /*****************************************************************************
  56  *  NETLINK_GENERIC netlink family.
  57  *****************************************************************************/
  58
  59 /*
  60  * Commands.
  61  * Valid TLVs of each command are:-
  62  * TUNNEL_CREATE        - CONN_ID, pw_type, netns, ifname, ipinfo, udpinfo, udpcsum, vlanid
  63  * TUNNEL_DELETE        - CONN_ID
  64  * TUNNEL_MODIFY        - CONN_ID, udpcsum
  65  * TUNNEL_GETSTATS      - CONN_ID, (stats)
  66  * TUNNEL_GET           - CONN_ID, (...)
  67  * SESSION_CREATE       - SESSION_ID, PW_TYPE, offset, data_seq, cookie, peer_cookie, offset, l2spec
  68  * SESSION_DELETE       - SESSION_ID
  69  * SESSION_MODIFY       - SESSION_ID, data_seq
  70  * SESSION_GET          - SESSION_ID, (...)
  71  * SESSION_GETSTATS     - SESSION_ID, (stats)
  72  *
  73  */
  74 enum {
  75         L2TP_CMD_NOOP,
  76         L2TP_CMD_TUNNEL_CREATE,
  77         L2TP_CMD_TUNNEL_DELETE,
  78         L2TP_CMD_TUNNEL_MODIFY,
  79         L2TP_CMD_TUNNEL_GET,
  80         L2TP_CMD_SESSION_CREATE,
  81         L2TP_CMD_SESSION_DELETE,
  82         L2TP_CMD_SESSION_MODIFY,
  83         L2TP_CMD_SESSION_GET,
  84         __L2TP_CMD_MAX,
  85 };
  86
  87 #define L2TP_CMD_MAX                    (__L2TP_CMD_MAX - 1)
  88
  89 /*
  90  * ATTR types defined for L2TP
  91  */
  92 enum {
  93         L2TP_ATTR_NONE,                 /* no data */
  94         L2TP_ATTR_PW_TYPE,              /* u16, enum l2tp_pwtype */
  95         L2TP_ATTR_ENCAP_TYPE,           /* u16, enum l2tp_encap_type */
  96         L2TP_ATTR_OFFSET,               /* u16 */
  97         L2TP_ATTR_DATA_SEQ,             /* u16 */
  98         L2TP_ATTR_L2SPEC_TYPE,          /* u8, enum l2tp_l2spec_type */
  99         L2TP_ATTR_L2SPEC_LEN,           /* u8, enum l2tp_l2spec_type */
 100         L2TP_ATTR_PROTO_VERSION,        /* u8 */
 101         L2TP_ATTR_IFNAME,               /* string */
 102         L2TP_ATTR_CONN_ID,              /* u32 */
 103         L2TP_ATTR_PEER_CONN_ID,         /* u32 */
 104         L2TP_ATTR_SESSION_ID,           /* u32 */
 105         L2TP_ATTR_PEER_SESSION_ID,      /* u32 */
 106         L2TP_ATTR_UDP_CSUM,             /* u8 */
 107         L2TP_ATTR_VLAN_ID,              /* u16 */
 108         L2TP_ATTR_COOKIE,               /* 0, 4 or 8 bytes */
 109         L2TP_ATTR_PEER_COOKIE,          /* 0, 4 or 8 bytes */
 110         L2TP_ATTR_DEBUG,                /* u32, enum l2tp_debug_flags */
 111         L2TP_ATTR_RECV_SEQ,             /* u8 */
 112         L2TP_ATTR_SEND_SEQ,             /* u8 */
 113         L2TP_ATTR_LNS_MODE,             /* u8 */
 114         L2TP_ATTR_USING_IPSEC,          /* u8 */
 115         L2TP_ATTR_RECV_TIMEOUT,         /* msec */
 116         L2TP_ATTR_FD,                   /* int */
 117         L2TP_ATTR_IP_SADDR,             /* u32 */
 118         L2TP_ATTR_IP_DADDR,             /* u32 */
 119         L2TP_ATTR_UDP_SPORT,            /* u16 */
 120         L2TP_ATTR_UDP_DPORT,            /* u16 */
 121         L2TP_ATTR_MTU,                  /* u16 */
 122         L2TP_ATTR_MRU,                  /* u16 */
 123         L2TP_ATTR_STATS,                /* nested */
 124         L2TP_ATTR_IP6_SADDR,            /* struct in6_addr */
 125         L2TP_ATTR_IP6_DADDR,            /* struct in6_addr */
 126         L2TP_ATTR_UDP_ZERO_CSUM6_TX,    /* flag */
 127         L2TP_ATTR_UDP_ZERO_CSUM6_RX,    /* flag */
 128         L2TP_ATTR_PAD,
 129         __L2TP_ATTR_MAX,
 130 };
 131
 132 #define L2TP_ATTR_MAX                   (__L2TP_ATTR_MAX - 1)
 133
 134 /* Nested in L2TP_ATTR_STATS */
 135 enum {
 136         L2TP_ATTR_STATS_NONE,           /* no data */
 137         L2TP_ATTR_TX_PACKETS,           /* u64 */
 138         L2TP_ATTR_TX_BYTES,             /* u64 */
 139         L2TP_ATTR_TX_ERRORS,            /* u64 */
 140         L2TP_ATTR_RX_PACKETS,           /* u64 */
 141         L2TP_ATTR_RX_BYTES,             /* u64 */
 142         L2TP_ATTR_RX_SEQ_DISCARDS,      /* u64 */
 143         L2TP_ATTR_RX_OOS_PACKETS,       /* u64 */
 144         L2TP_ATTR_RX_ERRORS,            /* u64 */
 145         L2TP_ATTR_STATS_PAD,
 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  * enum l2tp_debug_flags - debug message categories for L2TP tunnels/sessions
 179  *
 180  * @L2TP_MSG_DEBUG: verbose debug (if compiled in)
 181  * @L2TP_MSG_CONTROL: userspace - kernel interface
 182  * @L2TP_MSG_SEQ: sequence numbers
 183  * @L2TP_MSG_DATA: data packets
 184  */
 185 enum l2tp_debug_flags {
 186         L2TP_MSG_DEBUG          = (1 << 0),
 187         L2TP_MSG_CONTROL        = (1 << 1),
 188         L2TP_MSG_SEQ            = (1 << 2),
 189         L2TP_MSG_DATA           = (1 << 3),
 190 };
 191
 192 /*
 193  * NETLINK_GENERIC related info
 194  */
 195 #define L2TP_GENL_NAME          "l2tp"
 196 #define L2TP_GENL_VERSION       0x1
 197 #define L2TP_GENL_MCGROUP       "l2tp"
 198
 199 #endif /* _UAPI_LINUX_L2TP_H_ */