if_gre.h revision 103026
1103026Ssobomax/* $NetBSD: if_gre.h,v 1.10 2002/02/24 17:22:20 martin Exp $ */ 2103026Ssobomax/* $FreeBSD: head/sys/net/if_gre.h 103026 2002-09-06 17:12:50Z sobomax $ */ 3103026Ssobomax 4103026Ssobomax/* 5103026Ssobomax * Copyright (c) 1998 The NetBSD Foundation, Inc. 6103026Ssobomax * All rights reserved 7103026Ssobomax * 8103026Ssobomax * This code is derived from software contributed to The NetBSD Foundation 9103026Ssobomax * by Heiko W.Rupp <hwr@pilhuhn.de> 10103026Ssobomax * 11103026Ssobomax * Redistribution and use in source and binary forms, with or without 12103026Ssobomax * modification, are permitted provided that the following conditions 13103026Ssobomax * are met: 14103026Ssobomax * 1. Redistributions of source code must retain the above copyright 15103026Ssobomax * notice, this list of conditions and the following disclaimer. 16103026Ssobomax * 2. Redistributions in binary form must reproduce the above copyright 17103026Ssobomax * notice, this list of conditions and the following disclaimer in the 18103026Ssobomax * documentation and/or other materials provided with the distribution. 19103026Ssobomax * 3. All advertising materials mentioning features or use of this software 20103026Ssobomax * must display the following acknowledgement: 21103026Ssobomax * This product includes software developed by the NetBSD 22103026Ssobomax * Foundation, Inc. and its contributors. 23103026Ssobomax * 4. Neither the name of The NetBSD Foundation nor the names of its 24103026Ssobomax * contributors may be used to endorse or promote products derived 25103026Ssobomax * from this software without specific prior written permission. 26103026Ssobomax * 27103026Ssobomax * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28103026Ssobomax * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29103026Ssobomax * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30103026Ssobomax * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31103026Ssobomax * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32103026Ssobomax * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33103026Ssobomax * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34103026Ssobomax * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35103026Ssobomax * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36103026Ssobomax * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37103026Ssobomax * POSSIBILITY OF SUCH DAMAGE. 38103026Ssobomax */ 39103026Ssobomax 40103026Ssobomax#ifndef _NET_IF_GRE_H 41103026Ssobomax#define _NET_IF_GRE_H 42103026Ssobomax 43103026Ssobomax#include <sys/ioccom.h> 44103026Ssobomax#include <sys/queue.h> 45103026Ssobomax 46103026Ssobomaxstruct gre_softc { 47103026Ssobomax struct ifnet sc_if; 48103026Ssobomax LIST_ENTRY(gre_softc) sc_list; 49103026Ssobomax int gre_unit; 50103026Ssobomax int gre_flags; 51103026Ssobomax struct in_addr g_src; /* source address of gre packets */ 52103026Ssobomax struct in_addr g_dst; /* destination address of gre packets */ 53103026Ssobomax struct route route; /* routing entry that determines, where a 54103026Ssobomax encapsulated packet should go */ 55103026Ssobomax u_char g_proto; /* protocol of encapsulator */ 56103026Ssobomax 57103026Ssobomax const struct encaptab *encap; /* encapsulation cookie */ 58103026Ssobomax 59103026Ssobomax int called; /* infinite recursion preventer */ 60103026Ssobomax}; 61103026Ssobomax 62103026Ssobomax 63103026Ssobomaxstruct gre_h { 64103026Ssobomax u_int16_t flags; /* GRE flags */ 65103026Ssobomax u_int16_t ptype; /* protocol type of payload typically 66103026Ssobomax Ether protocol type*/ 67103026Ssobomax/* 68103026Ssobomax * from here on: fields are optional, presence indicated by flags 69103026Ssobomax * 70103026Ssobomax u_int_16 checksum checksum (one-complements of GRE header 71103026Ssobomax and payload 72103026Ssobomax Present if (ck_pres | rt_pres == 1). 73103026Ssobomax Valid if (ck_pres == 1). 74103026Ssobomax u_int_16 offset offset from start of routing filed to 75103026Ssobomax first octet of active SRE (see below). 76103026Ssobomax Present if (ck_pres | rt_pres == 1). 77103026Ssobomax Valid if (rt_pres == 1). 78103026Ssobomax u_int_32 key inserted by encapsulator e.g. for 79103026Ssobomax authentication 80103026Ssobomax Present if (key_pres ==1 ). 81103026Ssobomax u_int_32 seq_num Sequence number to allow for packet order 82103026Ssobomax Present if (seq_pres ==1 ). 83103026Ssobomax struct gre_sre[] routing Routing fileds (see below) 84103026Ssobomax Present if (rt_pres == 1) 85103026Ssobomax */ 86103026Ssobomax} __attribute__((__packed__)); 87103026Ssobomax 88103026Ssobomaxstruct greip { 89103026Ssobomax struct ip gi_i; 90103026Ssobomax struct gre_h gi_g; 91103026Ssobomax} __attribute__((__packed__)); 92103026Ssobomax 93103026Ssobomax#define gi_pr gi_i.ip_p 94103026Ssobomax#define gi_len gi_i.ip_len 95103026Ssobomax#define gi_src gi_i.ip_src 96103026Ssobomax#define gi_dst gi_i.ip_dst 97103026Ssobomax#define gi_ptype gi_g.ptype 98103026Ssobomax#define gi_flags gi_g.flags 99103026Ssobomax 100103026Ssobomax#define GRE_CP 0x8000 /* Checksum Present */ 101103026Ssobomax#define GRE_RP 0x4000 /* Routing Present */ 102103026Ssobomax#define GRE_KP 0x2000 /* Key Present */ 103103026Ssobomax#define GRE_SP 0x1000 /* Sequence Present */ 104103026Ssobomax#define GRE_SS 0x0800 /* Strict Source Route */ 105103026Ssobomax 106103026Ssobomax/* 107103026Ssobomax * gre_sre defines a Source route Entry. These are needed if packets 108103026Ssobomax * should be routed over more than one tunnel hop by hop 109103026Ssobomax */ 110103026Ssobomaxstruct gre_sre { 111103026Ssobomax u_int16_t sre_family; /* adress family */ 112103026Ssobomax u_char sre_offset; /* offset to first octet of active entry */ 113103026Ssobomax u_char sre_length; /* number of octets in the SRE. 114103026Ssobomax sre_lengthl==0 -> last entry. */ 115103026Ssobomax u_char *sre_rtinfo; /* the routing information */ 116103026Ssobomax}; 117103026Ssobomax 118103026Ssobomaxstruct greioctl { 119103026Ssobomax int unit; 120103026Ssobomax struct in_addr addr; 121103026Ssobomax}; 122103026Ssobomax 123103026Ssobomax/* for mobile encaps */ 124103026Ssobomax 125103026Ssobomaxstruct mobile_h { 126103026Ssobomax u_int16_t proto; /* protocol and S-bit */ 127103026Ssobomax u_int16_t hcrc; /* header checksum */ 128103026Ssobomax u_int32_t odst; /* original destination address */ 129103026Ssobomax u_int32_t osrc; /* original source addr, if S-bit set */ 130103026Ssobomax} __attribute__((__packed__)); 131103026Ssobomax 132103026Ssobomaxstruct mobip_h { 133103026Ssobomax struct ip mi; 134103026Ssobomax struct mobile_h mh; 135103026Ssobomax} __attribute__((__packed__)); 136103026Ssobomax 137103026Ssobomax 138103026Ssobomax#define MOB_H_SIZ_S (sizeof(struct mobile_h) - sizeof(u_int32_t)) 139103026Ssobomax#define MOB_H_SIZ_L (sizeof(struct mobile_h)) 140103026Ssobomax#define MOB_H_SBIT 0x0080 141103026Ssobomax 142103026Ssobomax#define GRE_TTL 30 143103026Ssobomaxextern int ip_gre_ttl; 144103026Ssobomax 145103026Ssobomax/* 146103026Ssobomax * ioctls needed to manipulate the interface 147103026Ssobomax */ 148103026Ssobomax 149103026Ssobomax#define GRESADDRS _IOW('i', 101, struct ifreq) 150103026Ssobomax#define GRESADDRD _IOW('i', 102, struct ifreq) 151103026Ssobomax#define GREGADDRS _IOWR('i', 103, struct ifreq) 152103026Ssobomax#define GREGADDRD _IOWR('i', 104, struct ifreq) 153103026Ssobomax#define GRESPROTO _IOW('i' , 105, struct ifreq) 154103026Ssobomax#define GREGPROTO _IOWR('i', 106, struct ifreq) 155103026Ssobomax 156103026Ssobomax#ifdef _KERNEL 157103026SsobomaxLIST_HEAD(gre_softc_head, gre_softc); 158103026Ssobomaxextern struct gre_softc_head gre_softc_list; 159103026Ssobomax 160103026Ssobomaxint gre_ioctl __P((struct ifnet *, u_long, caddr_t)); 161103026Ssobomaxint gre_output __P((struct ifnet *, struct mbuf *, struct sockaddr *, 162103026Ssobomax struct rtentry *rt)); 163103026Ssobomaxu_short gre_in_cksum(u_short *p, u_int len); 164103026Ssobomax#endif /* _KERNEL */ 165103026Ssobomax 166103026Ssobomax#endif 167