0d76751fad
This patch adds a new L2TPIP socket family and modifies the core to handle the case where there is no UDP header in the L2TP packet. L2TP/IP uses IP protocol 115. Since L2TP/UDP and L2TP/IP packets differ in layout, the datapath packet handling code needs changes too. Userspace uses an L2TPIP socket instead of a UDP socket when IP encapsulation is required. We can't use raw sockets for this because the semantics of raw sockets don't lend themselves to the socket-per-tunnel model - we need to Signed-off-by: David S. Miller <davem@davemloft.net>
39 lines
974 B
C
39 lines
974 B
C
/*
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* L2TP-over-IP socket for L2TPv3.
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*
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* Author: James Chapman <jchapman@katalix.com>
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*/
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#ifndef _LINUX_L2TP_H_
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#define _LINUX_L2TP_H_
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#include <linux/types.h>
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#ifdef __KERNEL__
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#include <linux/socket.h>
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#include <linux/in.h>
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#endif
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#define IPPROTO_L2TP 115
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/**
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* struct sockaddr_l2tpip - the sockaddr structure for L2TP-over-IP sockets
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* @l2tp_family: address family number AF_L2TPIP.
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* @l2tp_addr: protocol specific address information
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* @l2tp_conn_id: connection id of tunnel
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*/
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struct sockaddr_l2tpip {
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/* The first fields must match struct sockaddr_in */
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sa_family_t l2tp_family; /* AF_INET */
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__be16 l2tp_unused; /* INET port number (unused) */
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struct in_addr l2tp_addr; /* Internet address */
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__u32 l2tp_conn_id; /* Connection ID of tunnel */
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/* Pad to size of `struct sockaddr'. */
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unsigned char __pad[sizeof(struct sockaddr) - sizeof(sa_family_t) -
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sizeof(__be16) - sizeof(struct in_addr) -
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sizeof(__u32)];
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};
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#endif
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