167 lines
5.0 KiB
C
167 lines
5.0 KiB
C
/* $OpenBSD: mpls.h,v 1.46 2021/05/25 22:45:10 bluhm Exp $ */
|
|
|
|
/*
|
|
* Copyright (C) 1999, 2000 and 2001 AYAME Project, WIDE Project.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the project nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULARPURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, ORCONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef _NETMPLS_MPLS_H_
|
|
#define _NETMPLS_MPLS_H_
|
|
|
|
/*
|
|
* Structure of a SHIM header.
|
|
*/
|
|
#define MPLS_LABEL_MAX ((1 << 20) - 1)
|
|
|
|
struct shim_hdr {
|
|
u_int32_t shim_label; /* 20 bit label, 4 bit exp & BoS, 8 bit TTL */
|
|
};
|
|
|
|
#define MPLS_HDRLEN sizeof(struct shim_hdr)
|
|
|
|
/*
|
|
* By byte-swapping the constants, we avoid ever having to byte-swap IP
|
|
* addresses inside the kernel. Unfortunately, user-level programs rely
|
|
* on these macros not doing byte-swapping.
|
|
*/
|
|
|
|
#ifdef _KERNEL
|
|
#define __MADDR(x) ((u_int32_t)htonl((u_int32_t)(x)))
|
|
#else
|
|
#define __MADDR(x) ((u_int32_t)(x))
|
|
#endif
|
|
|
|
#define MPLS_LABEL_MASK __MADDR(0xfffff000U)
|
|
#define MPLS_LABEL_OFFSET 12
|
|
#define MPLS_EXP_MASK __MADDR(0x00000e00U)
|
|
#define MPLS_EXP_OFFSET 9
|
|
#define MPLS_BOS_MASK __MADDR(0x00000100U)
|
|
#define MPLS_BOS_OFFSET 8
|
|
#define MPLS_TTL_MASK __MADDR(0x000000ffU)
|
|
|
|
#define CW_ZERO_MASK __MADDR(0xf0000000U)
|
|
#define CW_FRAG_MASK __MADDR(0x00300000U)
|
|
|
|
#define MPLS_BOS_ISSET(l) (((l) & MPLS_BOS_MASK) == MPLS_BOS_MASK)
|
|
|
|
/* Reserved label values (RFC3032) */
|
|
#define MPLS_LABEL_IPV4NULL 0 /* IPv4 Explicit NULL Label */
|
|
#define MPLS_LABEL_RTALERT 1 /* Router Alert Label */
|
|
#define MPLS_LABEL_IPV6NULL 2 /* IPv6 Explicit NULL Label */
|
|
#define MPLS_LABEL_IMPLNULL 3 /* Implicit NULL Label */
|
|
/* MPLS_LABEL_RESERVED 4-15 */ /* Values 4-15 are reserved */
|
|
#define MPLS_LABEL_RESERVED_MAX 15
|
|
|
|
/*
|
|
* Socket address
|
|
*/
|
|
|
|
struct sockaddr_mpls {
|
|
u_int8_t smpls_len; /* length */
|
|
u_int8_t smpls_family; /* AF_MPLS */
|
|
u_int16_t smpls_pad0;
|
|
u_int32_t smpls_label; /* MPLS label */
|
|
u_int32_t smpls_pad1[2];
|
|
};
|
|
|
|
struct rt_mpls {
|
|
u_int32_t mpls_label;
|
|
u_int8_t mpls_operation;
|
|
u_int8_t mpls_exp;
|
|
};
|
|
|
|
#define MPLS_OP_LOCAL 0x0
|
|
#define MPLS_OP_POP 0x1
|
|
#define MPLS_OP_PUSH 0x2
|
|
#define MPLS_OP_SWAP 0x4
|
|
|
|
#define MPLS_INKERNEL_LOOP_MAX 16
|
|
|
|
#define satosmpls(sa) ((struct sockaddr_mpls *)(sa))
|
|
#define smplstosa(smpls) ((struct sockaddr *)(smpls))
|
|
|
|
/*
|
|
* Names for MPLS sysctl objects
|
|
*/
|
|
#define MPLSCTL_ENABLE 1
|
|
#define MPLSCTL_DEFTTL 2
|
|
#define MPLSCTL_MAPTTL_IP 5
|
|
#define MPLSCTL_MAPTTL_IP6 6
|
|
#define MPLSCTL_MAXID 7
|
|
|
|
#define MPLSCTL_NAMES { \
|
|
{ NULL, 0 }, \
|
|
{ NULL, 0 }, \
|
|
{ "ttl", CTLTYPE_INT }, \
|
|
{ "ifq", CTLTYPE_NODE },\
|
|
{ NULL, 0 }, \
|
|
{ "mapttl_ip", CTLTYPE_INT }, \
|
|
{ "mapttl_ip6", CTLTYPE_INT } \
|
|
}
|
|
|
|
#define IMR_TYPE_NONE 0
|
|
#define IMR_TYPE_ETHERNET 1
|
|
#define IMR_TYPE_ETHERNET_TAGGED 2
|
|
|
|
#define IMR_FLAG_CONTROLWORD 0x1
|
|
|
|
struct ifmpwreq {
|
|
uint32_t imr_flags;
|
|
uint32_t imr_type; /* pseudowire type */
|
|
struct shim_hdr imr_lshim; /* local label */
|
|
struct shim_hdr imr_rshim; /* remote label */
|
|
struct sockaddr_storage imr_nexthop;
|
|
};
|
|
|
|
#endif
|
|
|
|
#ifdef _KERNEL
|
|
|
|
#define MPLS_LABEL2SHIM(_l) (htonl((_l) << MPLS_LABEL_OFFSET))
|
|
#define MPLS_SHIM2LABEL(_s) (ntohl((_s)) >> MPLS_LABEL_OFFSET)
|
|
|
|
extern int mpls_defttl;
|
|
extern int mpls_mapttl_ip;
|
|
extern int mpls_mapttl_ip6;
|
|
|
|
|
|
struct mbuf *mpls_shim_pop(struct mbuf *);
|
|
struct mbuf *mpls_shim_swap(struct mbuf *, struct rt_mpls *);
|
|
struct mbuf *mpls_shim_push(struct mbuf *, struct rt_mpls *);
|
|
|
|
struct mbuf *mpls_ip_adjttl(struct mbuf *, u_int8_t);
|
|
#ifdef INET6
|
|
struct mbuf *mpls_ip6_adjttl(struct mbuf *, u_int8_t);
|
|
#endif
|
|
|
|
int mpls_output(struct ifnet *, struct mbuf *, struct sockaddr *,
|
|
struct rtentry *);
|
|
void mpls_input(struct ifnet *, struct mbuf *);
|
|
|
|
#endif /* _KERNEL */
|