kernel-ark/include/linux/l2tp.h
Chris Elston a32e0eec70 l2tp: introduce L2TPv3 IP encapsulation support for IPv6
L2TPv3 defines an IP encapsulation packet format where data is carried
directly over IP (no UDP). The kernel already has support for L2TP IP
encapsulation over IPv4 (l2tp_ip). This patch introduces support for
L2TP IP encapsulation over IPv6.

The implementation is derived from ipv6/raw and ipv4/l2tp_ip.

Signed-off-by: Chris Elston <celston@katalix.com>
Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-01 09:30:55 -04:00

184 lines
4.9 KiB
C

/*
* L2TP-over-IP socket for L2TPv3.
*
* Author: James Chapman <jchapman@katalix.com>
*/
#ifndef _LINUX_L2TP_H_
#define _LINUX_L2TP_H_
#include <linux/types.h>
#include <linux/socket.h>
#ifdef __KERNEL__
#include <linux/in.h>
#include <linux/in6.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 */
__kernel_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(__kernel_sa_family_t) -
sizeof(__be16) - sizeof(struct in_addr) -
sizeof(__u32)];
};
/**
* struct sockaddr_l2tpip6 - the sockaddr structure for L2TP-over-IPv6 sockets
* @l2tp_family: address family number AF_L2TPIP.
* @l2tp_addr: protocol specific address information
* @l2tp_conn_id: connection id of tunnel
*/
struct sockaddr_l2tpip6 {
/* The first fields must match struct sockaddr_in6 */
__kernel_sa_family_t l2tp_family; /* AF_INET6 */
__be16 l2tp_unused; /* INET port number (unused) */
__be32 l2tp_flowinfo; /* IPv6 flow information */
struct in6_addr l2tp_addr; /* IPv6 address */
__u32 l2tp_scope_id; /* scope id (new in RFC2553) */
__u32 l2tp_conn_id; /* Connection ID of tunnel */
};
/*****************************************************************************
* 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_IP6_SADDR, /* struct in6_addr */
L2TP_ATTR_IP6_DADDR, /* struct in6_addr */
__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