1 files changed, 38 insertions, 0 deletions

diff --git a/include/linux/l2tp.h b/include/linux/l2tp.h
new file mode 100644
index 000000000000..deff7bca4e05
--- /dev/null
+++ b/include/linux/l2tp.h
@@ -0,0 +1,38 @@
+/*
+ * 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>
+#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
+ */
+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)];
+};
+
+#endif