a5185adeb6
of needed interface when many gre interfaces are present. Remove rmlock from gre_softc, use epoch(9) and CK_LIST instead. Move more AF-related code into AF-related locations. Use hash table to speedup lookup of needed softc.
146 lines
4.6 KiB
C
146 lines
4.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* Copyright (c) 2014 Andrey V. Elsukov <ae@FreeBSD.org>
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* All rights reserved
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Heiko W.Rupp <hwr@pilhuhn.de>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $NetBSD: if_gre.h,v 1.13 2003/11/10 08:51:52 wiz Exp $
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* $FreeBSD$
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*/
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#ifndef _NET_IF_GRE_H_
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#define _NET_IF_GRE_H_
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#ifdef _KERNEL
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/* GRE header according to RFC 2784 and RFC 2890 */
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struct grehdr {
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uint16_t gre_flags; /* GRE flags */
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#define GRE_FLAGS_CP 0x8000 /* checksum present */
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#define GRE_FLAGS_KP 0x2000 /* key present */
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#define GRE_FLAGS_SP 0x1000 /* sequence present */
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#define GRE_FLAGS_MASK (GRE_FLAGS_CP|GRE_FLAGS_KP|GRE_FLAGS_SP)
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uint16_t gre_proto; /* protocol type */
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uint32_t gre_opts[0]; /* optional fields */
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} __packed;
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#ifdef INET
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struct greip {
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struct ip gi_ip;
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struct grehdr gi_gre;
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} __packed;
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#endif
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#ifdef INET6
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struct greip6 {
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struct ip6_hdr gi6_ip6;
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struct grehdr gi6_gre;
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} __packed;
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#endif
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struct gre_softc {
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struct ifnet *gre_ifp;
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int gre_family; /* AF of delivery header */
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uint32_t gre_iseq;
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uint32_t gre_oseq;
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uint32_t gre_key;
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uint32_t gre_options;
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u_int gre_fibnum;
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u_int gre_hlen; /* header size */
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union {
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void *hdr;
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#ifdef INET
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struct greip *gihdr;
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#endif
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#ifdef INET6
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struct greip6 *gi6hdr;
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#endif
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} gre_uhdr;
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CK_LIST_ENTRY(gre_softc) chain;
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};
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CK_LIST_HEAD(gre_list, gre_softc);
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MALLOC_DECLARE(M_GRE);
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#ifndef GRE_HASH_SIZE
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#define GRE_HASH_SIZE (1 << 4)
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#endif
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#define GRE2IFP(sc) ((sc)->gre_ifp)
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#define GRE_RLOCK() epoch_enter_preempt(net_epoch_preempt)
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#define GRE_RUNLOCK() epoch_exit_preempt(net_epoch_preempt)
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#define GRE_WAIT() epoch_wait_preempt(net_epoch_preempt)
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#define gre_hdr gre_uhdr.hdr
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#define gre_gihdr gre_uhdr.gihdr
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#define gre_gi6hdr gre_uhdr.gi6hdr
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#define gre_oip gre_gihdr->gi_ip
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#define gre_oip6 gre_gi6hdr->gi6_ip6
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struct gre_list *gre_hashinit(void);
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void gre_hashdestroy(struct gre_list *);
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int gre_input(struct mbuf *, int, int, void *);
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void gre_updatehdr(struct gre_softc *, struct grehdr *);
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void in_gre_init(void);
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void in_gre_uninit(void);
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void in_gre_setopts(struct gre_softc *, u_long, uint32_t);
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int in_gre_ioctl(struct gre_softc *, u_long, caddr_t);
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int in_gre_output(struct mbuf *, int, int);
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void in6_gre_init(void);
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void in6_gre_uninit(void);
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void in6_gre_setopts(struct gre_softc *, u_long, uint32_t);
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int in6_gre_ioctl(struct gre_softc *, u_long, caddr_t);
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int in6_gre_output(struct mbuf *, int, int);
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/*
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* CISCO uses special type for GRE tunnel created as part of WCCP
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* connection, while in fact those packets are just IPv4 encapsulated
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* into GRE.
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*/
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#define ETHERTYPE_WCCP 0x883E
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#endif /* _KERNEL */
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#define GRESADDRS _IOW('i', 101, struct ifreq)
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#define GRESADDRD _IOW('i', 102, struct ifreq)
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#define GREGADDRS _IOWR('i', 103, struct ifreq)
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#define GREGADDRD _IOWR('i', 104, struct ifreq)
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#define GRESPROTO _IOW('i' , 105, struct ifreq)
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#define GREGPROTO _IOWR('i', 106, struct ifreq)
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#define GREGKEY _IOWR('i', 107, struct ifreq)
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#define GRESKEY _IOW('i', 108, struct ifreq)
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#define GREGOPTS _IOWR('i', 109, struct ifreq)
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#define GRESOPTS _IOW('i', 110, struct ifreq)
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#define GRE_ENABLE_CSUM 0x0001
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#define GRE_ENABLE_SEQ 0x0002
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#define GRE_OPTMASK (GRE_ENABLE_CSUM|GRE_ENABLE_SEQ)
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#endif /* _NET_IF_GRE_H_ */
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