a32e0eec70
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>
183 lines
4.9 KiB
C
183 lines
4.9 KiB
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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#include <linux/socket.h>
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#ifdef __KERNEL__
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#include <linux/in.h>
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#include <linux/in6.h>
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#else
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#include <netinet/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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#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
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struct sockaddr_l2tpip {
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/* The first fields must match struct sockaddr_in */
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__kernel_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) -
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sizeof(__kernel_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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/**
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* struct sockaddr_l2tpip6 - the sockaddr structure for L2TP-over-IPv6 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_l2tpip6 {
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/* The first fields must match struct sockaddr_in6 */
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__kernel_sa_family_t l2tp_family; /* AF_INET6 */
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__be16 l2tp_unused; /* INET port number (unused) */
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__be32 l2tp_flowinfo; /* IPv6 flow information */
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struct in6_addr l2tp_addr; /* IPv6 address */
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__u32 l2tp_scope_id; /* scope id (new in RFC2553) */
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__u32 l2tp_conn_id; /* Connection ID of tunnel */
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};
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/*****************************************************************************
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* NETLINK_GENERIC netlink family.
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*****************************************************************************/
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/*
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* Commands.
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* Valid TLVs of each command are:-
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* TUNNEL_CREATE - CONN_ID, pw_type, netns, ifname, ipinfo, udpinfo, udpcsum, vlanid
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* TUNNEL_DELETE - CONN_ID
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* TUNNEL_MODIFY - CONN_ID, udpcsum
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* TUNNEL_GETSTATS - CONN_ID, (stats)
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* TUNNEL_GET - CONN_ID, (...)
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* SESSION_CREATE - SESSION_ID, PW_TYPE, offset, data_seq, cookie, peer_cookie, offset, l2spec
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* SESSION_DELETE - SESSION_ID
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* SESSION_MODIFY - SESSION_ID, data_seq
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* SESSION_GET - SESSION_ID, (...)
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* SESSION_GETSTATS - SESSION_ID, (stats)
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*
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*/
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enum {
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L2TP_CMD_NOOP,
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L2TP_CMD_TUNNEL_CREATE,
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L2TP_CMD_TUNNEL_DELETE,
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L2TP_CMD_TUNNEL_MODIFY,
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L2TP_CMD_TUNNEL_GET,
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L2TP_CMD_SESSION_CREATE,
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L2TP_CMD_SESSION_DELETE,
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L2TP_CMD_SESSION_MODIFY,
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L2TP_CMD_SESSION_GET,
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__L2TP_CMD_MAX,
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};
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#define L2TP_CMD_MAX (__L2TP_CMD_MAX - 1)
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/*
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* ATTR types defined for L2TP
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*/
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enum {
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L2TP_ATTR_NONE, /* no data */
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L2TP_ATTR_PW_TYPE, /* u16, enum l2tp_pwtype */
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L2TP_ATTR_ENCAP_TYPE, /* u16, enum l2tp_encap_type */
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L2TP_ATTR_OFFSET, /* u16 */
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L2TP_ATTR_DATA_SEQ, /* u16 */
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L2TP_ATTR_L2SPEC_TYPE, /* u8, enum l2tp_l2spec_type */
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L2TP_ATTR_L2SPEC_LEN, /* u8, enum l2tp_l2spec_type */
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L2TP_ATTR_PROTO_VERSION, /* u8 */
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L2TP_ATTR_IFNAME, /* string */
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L2TP_ATTR_CONN_ID, /* u32 */
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L2TP_ATTR_PEER_CONN_ID, /* u32 */
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L2TP_ATTR_SESSION_ID, /* u32 */
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L2TP_ATTR_PEER_SESSION_ID, /* u32 */
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L2TP_ATTR_UDP_CSUM, /* u8 */
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L2TP_ATTR_VLAN_ID, /* u16 */
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L2TP_ATTR_COOKIE, /* 0, 4 or 8 bytes */
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L2TP_ATTR_PEER_COOKIE, /* 0, 4 or 8 bytes */
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L2TP_ATTR_DEBUG, /* u32 */
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L2TP_ATTR_RECV_SEQ, /* u8 */
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L2TP_ATTR_SEND_SEQ, /* u8 */
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L2TP_ATTR_LNS_MODE, /* u8 */
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L2TP_ATTR_USING_IPSEC, /* u8 */
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L2TP_ATTR_RECV_TIMEOUT, /* msec */
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L2TP_ATTR_FD, /* int */
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L2TP_ATTR_IP_SADDR, /* u32 */
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L2TP_ATTR_IP_DADDR, /* u32 */
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L2TP_ATTR_UDP_SPORT, /* u16 */
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L2TP_ATTR_UDP_DPORT, /* u16 */
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L2TP_ATTR_MTU, /* u16 */
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L2TP_ATTR_MRU, /* u16 */
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L2TP_ATTR_STATS, /* nested */
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L2TP_ATTR_IP6_SADDR, /* struct in6_addr */
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L2TP_ATTR_IP6_DADDR, /* struct in6_addr */
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__L2TP_ATTR_MAX,
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};
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#define L2TP_ATTR_MAX (__L2TP_ATTR_MAX - 1)
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/* Nested in L2TP_ATTR_STATS */
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enum {
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L2TP_ATTR_STATS_NONE, /* no data */
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L2TP_ATTR_TX_PACKETS, /* u64 */
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L2TP_ATTR_TX_BYTES, /* u64 */
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L2TP_ATTR_TX_ERRORS, /* u64 */
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L2TP_ATTR_RX_PACKETS, /* u64 */
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L2TP_ATTR_RX_BYTES, /* u64 */
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L2TP_ATTR_RX_SEQ_DISCARDS, /* u64 */
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L2TP_ATTR_RX_OOS_PACKETS, /* u64 */
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L2TP_ATTR_RX_ERRORS, /* u64 */
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__L2TP_ATTR_STATS_MAX,
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};
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#define L2TP_ATTR_STATS_MAX (__L2TP_ATTR_STATS_MAX - 1)
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enum l2tp_pwtype {
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L2TP_PWTYPE_NONE = 0x0000,
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L2TP_PWTYPE_ETH_VLAN = 0x0004,
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L2TP_PWTYPE_ETH = 0x0005,
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L2TP_PWTYPE_PPP = 0x0007,
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L2TP_PWTYPE_PPP_AC = 0x0008,
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L2TP_PWTYPE_IP = 0x000b,
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__L2TP_PWTYPE_MAX
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};
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enum l2tp_l2spec_type {
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L2TP_L2SPECTYPE_NONE,
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L2TP_L2SPECTYPE_DEFAULT,
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};
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enum l2tp_encap_type {
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L2TP_ENCAPTYPE_UDP,
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L2TP_ENCAPTYPE_IP,
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};
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enum l2tp_seqmode {
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L2TP_SEQ_NONE = 0,
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L2TP_SEQ_IP = 1,
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L2TP_SEQ_ALL = 2,
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};
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/*
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* NETLINK_GENERIC related info
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*/
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#define L2TP_GENL_NAME "l2tp"
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#define L2TP_GENL_VERSION 0x1
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#endif
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