1 files changed, 163 insertions, 0 deletions

diff --git a/include/linux/l2tp.h b/include/linux/l2tp.h
new file mode 100644
index 000000000000..4bdb31df8e72
--- /dev/null
+++ b/include/linux/l2tp.h
@@ -0,0 +1,163 @@
+/*
+ * L2TP-over-IP socket for L2TPv3.
+ *
+ * Author: James Chapman <jchapman@katalix.com>
+ */
+
+#ifndef _LINUX_L2TP_H_
+#define _LINUX_L2TP_H_
+
+#include <linux/types.h>
+#ifdef __KERNEL__
+#include <linux/socket.h>
+#include <linux/in.h>
+#else
+#include <netinet/in.h>
+#endif
+
+#define IPPROTO_L2TP            115
+
+/**
+ * struct sockaddr_l2tpip - the sockaddr structure for L2TP-over-IP sockets
+ * @l2tp_family:  address family number AF_L2TPIP.
+ * @l2tp_addr:    protocol specific address information
+ * @l2tp_conn_id: connection id of tunnel
+ */
+#define __SOCK_SIZE__   16              /* sizeof(struct sockaddr)      */
+struct sockaddr_l2tpip {
+        /* The first fields must match struct sockaddr_in */
+        sa_family_t     l2tp_family;    /* AF_INET */
+        __be16          l2tp_unused;    /* INET port number (unused) */
+        struct in_addr  l2tp_addr;      /* Internet address */
+
+        __u32           l2tp_conn_id;   /* Connection ID of tunnel */
+
+        /* Pad to size of `struct sockaddr'. */
+        unsigned char   __pad[sizeof(struct sockaddr) - sizeof(sa_family_t) -
+                              sizeof(__be16) - sizeof(struct in_addr) -
+                              sizeof(__u32)];
+};
+
+/*****************************************************************************
+ *  NETLINK_GENERIC netlink family.
+ *****************************************************************************/
+
+/*
+ * Commands.
+ * Valid TLVs of each command are:-
+ * TUNNEL_CREATE        - CONN_ID, pw_type, netns, ifname, ipinfo, udpinfo, udpcsum, vlanid
+ * TUNNEL_DELETE        - CONN_ID
+ * TUNNEL_MODIFY        - CONN_ID, udpcsum
+ * TUNNEL_GETSTATS      - CONN_ID, (stats)
+ * TUNNEL_GET           - CONN_ID, (...)
+ * SESSION_CREATE       - SESSION_ID, PW_TYPE, offset, data_seq, cookie, peer_cookie, offset, l2spec
+ * SESSION_DELETE       - SESSION_ID
+ * SESSION_MODIFY       - SESSION_ID, data_seq
+ * SESSION_GET          - SESSION_ID, (...)
+ * SESSION_GETSTATS     - SESSION_ID, (stats)
+ *
+ */
+enum {
+        L2TP_CMD_NOOP,
+        L2TP_CMD_TUNNEL_CREATE,
+        L2TP_CMD_TUNNEL_DELETE,
+        L2TP_CMD_TUNNEL_MODIFY,
+        L2TP_CMD_TUNNEL_GET,
+        L2TP_CMD_SESSION_CREATE,
+        L2TP_CMD_SESSION_DELETE,
+        L2TP_CMD_SESSION_MODIFY,
+        L2TP_CMD_SESSION_GET,
+        __L2TP_CMD_MAX,
+};
+
+#define L2TP_CMD_MAX                    (__L2TP_CMD_MAX - 1)
+
+/*
+ * ATTR types defined for L2TP
+ */
+enum {
+        L2TP_ATTR_NONE,                 /* no data */
+        L2TP_ATTR_PW_TYPE,              /* u16, enum l2tp_pwtype */
+        L2TP_ATTR_ENCAP_TYPE,           /* u16, enum l2tp_encap_type */
+        L2TP_ATTR_OFFSET,               /* u16 */
+        L2TP_ATTR_DATA_SEQ,             /* u16 */
+        L2TP_ATTR_L2SPEC_TYPE,          /* u8, enum l2tp_l2spec_type */
+        L2TP_ATTR_L2SPEC_LEN,           /* u8, enum l2tp_l2spec_type */
+        L2TP_ATTR_PROTO_VERSION,        /* u8 */
+        L2TP_ATTR_IFNAME,               /* string */
+        L2TP_ATTR_CONN_ID,              /* u32 */
+        L2TP_ATTR_PEER_CONN_ID,         /* u32 */
+        L2TP_ATTR_SESSION_ID,           /* u32 */
+        L2TP_ATTR_PEER_SESSION_ID,      /* u32 */
+        L2TP_ATTR_UDP_CSUM,             /* u8 */
+        L2TP_ATTR_VLAN_ID,              /* u16 */
+        L2TP_ATTR_COOKIE,               /* 0, 4 or 8 bytes */
+        L2TP_ATTR_PEER_COOKIE,          /* 0, 4 or 8 bytes */
+        L2TP_ATTR_DEBUG,                /* u32 */
+        L2TP_ATTR_RECV_SEQ,             /* u8 */
+        L2TP_ATTR_SEND_SEQ,             /* u8 */
+        L2TP_ATTR_LNS_MODE,             /* u8 */
+        L2TP_ATTR_USING_IPSEC,          /* u8 */
+        L2TP_ATTR_RECV_TIMEOUT,         /* msec */
+        L2TP_ATTR_FD,                   /* int */
+        L2TP_ATTR_IP_SADDR,             /* u32 */
+        L2TP_ATTR_IP_DADDR,             /* u32 */
+        L2TP_ATTR_UDP_SPORT,            /* u16 */
+        L2TP_ATTR_UDP_DPORT,            /* u16 */
+        L2TP_ATTR_MTU,                  /* u16 */
+        L2TP_ATTR_MRU,                  /* u16 */
+        L2TP_ATTR_STATS,                /* nested */
+        __L2TP_ATTR_MAX,
+};
+
+#define L2TP_ATTR_MAX                   (__L2TP_ATTR_MAX - 1)
+
+/* Nested in L2TP_ATTR_STATS */
+enum {
+        L2TP_ATTR_STATS_NONE,           /* no data */
+        L2TP_ATTR_TX_PACKETS,           /* u64 */
+        L2TP_ATTR_TX_BYTES,             /* u64 */
+        L2TP_ATTR_TX_ERRORS,            /* u64 */
+        L2TP_ATTR_RX_PACKETS,           /* u64 */
+        L2TP_ATTR_RX_BYTES,             /* u64 */
+        L2TP_ATTR_RX_SEQ_DISCARDS,      /* u64 */
+        L2TP_ATTR_RX_OOS_PACKETS,       /* u64 */
+        L2TP_ATTR_RX_ERRORS,            /* u64 */
+        __L2TP_ATTR_STATS_MAX,
+};
+
+#define L2TP_ATTR_STATS_MAX             (__L2TP_ATTR_STATS_MAX - 1)
+
+enum l2tp_pwtype {
+        L2TP_PWTYPE_NONE = 0x0000,
+        L2TP_PWTYPE_ETH_VLAN = 0x0004,
+        L2TP_PWTYPE_ETH = 0x0005,
+        L2TP_PWTYPE_PPP = 0x0007,
+        L2TP_PWTYPE_PPP_AC = 0x0008,
+        L2TP_PWTYPE_IP = 0x000b,
+        __L2TP_PWTYPE_MAX
+};
+
+enum l2tp_l2spec_type {
+        L2TP_L2SPECTYPE_NONE,
+        L2TP_L2SPECTYPE_DEFAULT,
+};
+
+enum l2tp_encap_type {
+        L2TP_ENCAPTYPE_UDP,
+        L2TP_ENCAPTYPE_IP,
+};
+
+enum l2tp_seqmode {
+        L2TP_SEQ_NONE = 0,
+        L2TP_SEQ_IP = 1,
+        L2TP_SEQ_ALL = 2,
+};
+
+/*
+ * NETLINK_GENERIC related info
+ */
+#define L2TP_GENL_NAME          "l2tp"
+#define L2TP_GENL_VERSION       0x1
+
+#endif