/* $NetBSD: if_gre.h,v 1.10 2002/02/24 17:22:20 martin Exp $ */ /* $FreeBSD: src/sys/net/if_gre.h,v 1.6.2.2 2002/12/03 01:17:52 peter Exp $ */ /* $DragonFly: src/sys/net/gre/if_gre.h,v 1.2 2003/06/17 04:28:48 dillon Exp $ */ /* * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 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> struct gre_softc { struct ifnet sc_if; LIST_ENTRY(gre_softc) sc_list; int gre_unit; int gre_flags; struct in_addr g_src; /* source address of gre packets */ struct in_addr g_dst; /* destination address of gre packets */ struct route *route_pcpu;/* routing entry that determines, where a encapsulated packet should go */ u_char g_proto; /* protocol of encapsulator */ const struct encaptab *encap; /* encapsulation cookie */ struct resource *r_unit;/* resource allocated for this unit */ }; struct gre_h { u_int16_t flags; /* GRE flags */ u_int16_t ptype; /* protocol type of payload typically Ether protocol type*/ /* * 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) */ } __attribute__((__packed__)); struct greip { struct ip gi_i; struct gre_h gi_g; } __attribute__((__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 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; /* adress 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 */ } __attribute__((__packed__)); struct mobip_h { struct ip mi; struct mobile_h mh; } __attribute__((__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) #ifdef _KERNEL LIST_HEAD(gre_softc_head, gre_softc); extern struct gre_softc_head gre_softc_list; u_short gre_in_cksum(u_short *p, u_int len); #endif /* _KERNEL */ #endif
