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-rw-r--r--include/uapi/linux/if_pppol2tp.h104
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diff --git a/include/uapi/linux/if_pppol2tp.h b/include/uapi/linux/if_pppol2tp.h
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+++ b/include/uapi/linux/if_pppol2tp.h
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+/***************************************************************************
+ * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661)
+ *
+ * This file supplies definitions required by the PPP over L2TP driver
+ * (l2tp_ppp.c). All version information wrt this file is located in l2tp_ppp.c
+ *
+ * License:
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#ifndef _UAPI__LINUX_IF_PPPOL2TP_H
+#define _UAPI__LINUX_IF_PPPOL2TP_H
+
+#include <linux/types.h>
+
+
+/* Structure used to connect() the socket to a particular tunnel UDP
+ * socket over IPv4.
+ */
+struct pppol2tp_addr {
+ __kernel_pid_t pid; /* pid that owns the fd.
+ * 0 => current */
+ int fd; /* FD of UDP socket to use */
+
+ struct sockaddr_in addr; /* IP address and port to send to */
+
+ __u16 s_tunnel, s_session; /* For matching incoming packets */
+ __u16 d_tunnel, d_session; /* For sending outgoing packets */
+};
+
+/* Structure used to connect() the socket to a particular tunnel UDP
+ * socket over IPv6.
+ */
+struct pppol2tpin6_addr {
+ __kernel_pid_t pid; /* pid that owns the fd.
+ * 0 => current */
+ int fd; /* FD of UDP socket to use */
+
+ __u16 s_tunnel, s_session; /* For matching incoming packets */
+ __u16 d_tunnel, d_session; /* For sending outgoing packets */
+
+ struct sockaddr_in6 addr; /* IP address and port to send to */
+};
+
+/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
+ * bits. So we need a different sockaddr structure.
+ */
+struct pppol2tpv3_addr {
+ __kernel_pid_t pid; /* pid that owns the fd.
+ * 0 => current */
+ int fd; /* FD of UDP or IP socket to use */
+
+ struct sockaddr_in addr; /* IP address and port to send to */
+
+ __u32 s_tunnel, s_session; /* For matching incoming packets */
+ __u32 d_tunnel, d_session; /* For sending outgoing packets */
+};
+
+struct pppol2tpv3in6_addr {
+ __kernel_pid_t pid; /* pid that owns the fd.
+ * 0 => current */
+ int fd; /* FD of UDP or IP socket to use */
+
+ __u32 s_tunnel, s_session; /* For matching incoming packets */
+ __u32 d_tunnel, d_session; /* For sending outgoing packets */
+
+ struct sockaddr_in6 addr; /* IP address and port to send to */
+};
+
+/* Socket options:
+ * DEBUG - bitmask of debug message categories
+ * SENDSEQ - 0 => don't send packets with sequence numbers
+ * 1 => send packets with sequence numbers
+ * RECVSEQ - 0 => receive packet sequence numbers are optional
+ * 1 => drop receive packets without sequence numbers
+ * LNSMODE - 0 => act as LAC.
+ * 1 => act as LNS.
+ * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder.
+ */
+enum {
+ PPPOL2TP_SO_DEBUG = 1,
+ PPPOL2TP_SO_RECVSEQ = 2,
+ PPPOL2TP_SO_SENDSEQ = 3,
+ PPPOL2TP_SO_LNSMODE = 4,
+ PPPOL2TP_SO_REORDERTO = 5,
+};
+
+/* Debug message categories for the DEBUG socket option */
+enum {
+ PPPOL2TP_MSG_DEBUG = (1 << 0), /* verbose debug (if
+ * compiled in) */
+ PPPOL2TP_MSG_CONTROL = (1 << 1), /* userspace - kernel
+ * interface */
+ PPPOL2TP_MSG_SEQ = (1 << 2), /* sequence numbers */
+ PPPOL2TP_MSG_DATA = (1 << 3), /* data packets */
+};
+
+
+
+#endif /* _UAPI__LINUX_IF_PPPOL2TP_H */
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