188 lines
5.6 KiB
C
188 lines
5.6 KiB
C
/* $NetBSD: if_gre.h,v 1.13 2003/11/10 08:51:52 wiz Exp $ */
|
|
/* $FreeBSD$ */
|
|
|
|
/*-
|
|
* Copyright (c) 1998 The NetBSD Foundation, Inc.
|
|
* All rights reserved
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Heiko W.Rupp <hwr@pilhuhn.de>
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL 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 _NET_IF_GRE_H
|
|
#define _NET_IF_GRE_H
|
|
|
|
#include <sys/ioccom.h>
|
|
#ifdef _KERNEL
|
|
#include <sys/queue.h>
|
|
|
|
/*
|
|
* Version of the WCCP, need to be configured manually since
|
|
* header for version 2 is the same but IP payload is prepended
|
|
* with additional 4-bytes field.
|
|
*/
|
|
typedef enum {
|
|
WCCP_V1 = 0,
|
|
WCCP_V2
|
|
} wccp_ver_t;
|
|
|
|
struct gre_softc {
|
|
struct ifnet *sc_ifp;
|
|
LIST_ENTRY(gre_softc) sc_list;
|
|
int gre_unit;
|
|
int gre_flags;
|
|
u_int gre_fibnum; /* use this fib for envelopes */
|
|
struct in_addr g_src; /* source address of gre packets */
|
|
struct in_addr g_dst; /* destination address of gre packets */
|
|
struct route route; /* routing entry that determines, where a
|
|
encapsulated packet should go */
|
|
u_char g_proto; /* protocol of encapsulator */
|
|
|
|
const struct encaptab *encap; /* encapsulation cookie */
|
|
|
|
int called; /* infinite recursion preventer */
|
|
|
|
uint32_t key; /* key included in outgoing GRE packets */
|
|
/* zero means none */
|
|
|
|
wccp_ver_t wccp_ver; /* version of the WCCP */
|
|
};
|
|
#define GRE2IFP(sc) ((sc)->sc_ifp)
|
|
|
|
|
|
struct gre_h {
|
|
u_int16_t flags; /* GRE flags */
|
|
u_int16_t ptype; /* protocol type of payload typically
|
|
Ether protocol type*/
|
|
uint32_t options[0]; /* optional options */
|
|
/*
|
|
* from here on: fields are optional, presence indicated by flags
|
|
*
|
|
u_int_16 checksum checksum (one-complements of GRE header
|
|
and payload
|
|
Present if (ck_pres | rt_pres == 1).
|
|
Valid if (ck_pres == 1).
|
|
u_int_16 offset offset from start of routing filed to
|
|
first octet of active SRE (see below).
|
|
Present if (ck_pres | rt_pres == 1).
|
|
Valid if (rt_pres == 1).
|
|
u_int_32 key inserted by encapsulator e.g. for
|
|
authentication
|
|
Present if (key_pres ==1 ).
|
|
u_int_32 seq_num Sequence number to allow for packet order
|
|
Present if (seq_pres ==1 ).
|
|
struct gre_sre[] routing Routing fileds (see below)
|
|
Present if (rt_pres == 1)
|
|
*/
|
|
} __packed;
|
|
|
|
struct greip {
|
|
struct ip gi_i;
|
|
struct gre_h gi_g;
|
|
} __packed;
|
|
|
|
#define gi_pr gi_i.ip_p
|
|
#define gi_len gi_i.ip_len
|
|
#define gi_src gi_i.ip_src
|
|
#define gi_dst gi_i.ip_dst
|
|
#define gi_ptype gi_g.ptype
|
|
#define gi_flags gi_g.flags
|
|
#define gi_options gi_g.options
|
|
|
|
#define GRE_CP 0x8000 /* Checksum Present */
|
|
#define GRE_RP 0x4000 /* Routing Present */
|
|
#define GRE_KP 0x2000 /* Key Present */
|
|
#define GRE_SP 0x1000 /* Sequence Present */
|
|
#define GRE_SS 0x0800 /* Strict Source Route */
|
|
|
|
/*
|
|
* CISCO uses special type for GRE tunnel created as part of WCCP
|
|
* connection, while in fact those packets are just IPv4 encapsulated
|
|
* into GRE.
|
|
*/
|
|
#define WCCP_PROTOCOL_TYPE 0x883E
|
|
|
|
/*
|
|
* gre_sre defines a Source route Entry. These are needed if packets
|
|
* should be routed over more than one tunnel hop by hop
|
|
*/
|
|
struct gre_sre {
|
|
u_int16_t sre_family; /* address family */
|
|
u_char sre_offset; /* offset to first octet of active entry */
|
|
u_char sre_length; /* number of octets in the SRE.
|
|
sre_lengthl==0 -> last entry. */
|
|
u_char *sre_rtinfo; /* the routing information */
|
|
};
|
|
|
|
struct greioctl {
|
|
int unit;
|
|
struct in_addr addr;
|
|
};
|
|
|
|
/* for mobile encaps */
|
|
|
|
struct mobile_h {
|
|
u_int16_t proto; /* protocol and S-bit */
|
|
u_int16_t hcrc; /* header checksum */
|
|
u_int32_t odst; /* original destination address */
|
|
u_int32_t osrc; /* original source addr, if S-bit set */
|
|
} __packed;
|
|
|
|
struct mobip_h {
|
|
struct ip mi;
|
|
struct mobile_h mh;
|
|
} __packed;
|
|
|
|
|
|
#define MOB_H_SIZ_S (sizeof(struct mobile_h) - sizeof(u_int32_t))
|
|
#define MOB_H_SIZ_L (sizeof(struct mobile_h))
|
|
#define MOB_H_SBIT 0x0080
|
|
|
|
#define GRE_TTL 30
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
/*
|
|
* ioctls needed to manipulate the interface
|
|
*/
|
|
|
|
#define GRESADDRS _IOW('i', 101, struct ifreq)
|
|
#define GRESADDRD _IOW('i', 102, struct ifreq)
|
|
#define GREGADDRS _IOWR('i', 103, struct ifreq)
|
|
#define GREGADDRD _IOWR('i', 104, struct ifreq)
|
|
#define GRESPROTO _IOW('i' , 105, struct ifreq)
|
|
#define GREGPROTO _IOWR('i', 106, struct ifreq)
|
|
#define GREGKEY _IOWR('i', 107, struct ifreq)
|
|
#define GRESKEY _IOW('i', 108, struct ifreq)
|
|
|
|
#ifdef _KERNEL
|
|
LIST_HEAD(gre_softc_head, gre_softc);
|
|
extern struct mtx gre_mtx;
|
|
extern struct gre_softc_head gre_softc_list;
|
|
|
|
u_int16_t gre_in_cksum(u_int16_t *, u_int);
|
|
#endif /* _KERNEL */
|
|
|
|
#endif
|