175 lines
5.2 KiB
C
175 lines
5.2 KiB
C
/* $NetBSD: if_gre.h,v 1.39 2008/09/08 23:36:55 gmcgarry Exp $ */
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/*
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* Copyright (c) 1998, 2008 The NetBSD Foundation, Inc.
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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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* This code is derived from software contributed to The NetBSD Foundation
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* by David Young <dyoung@NetBSD.org>
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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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* This material is based upon work partially supported by NSF
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* under Contract No. NSF CNS-0626584.
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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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#include <sys/evcnt.h>
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#include <sys/queue.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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#include <sys/malloc.h>
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#include <sys/mallocvar.h>
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#ifdef _KERNEL
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struct gre_soparm {
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struct socket *sp_so;
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struct sockaddr_storage sp_src; /* source of gre packets */
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struct sockaddr_storage sp_dst; /* destination of gre packets */
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int sp_type; /* encapsulating socket type */
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int sp_proto; /* encapsulating protocol */
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bool sp_bysock; /* encapsulation configured by passing
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* socket, not by SIOCSLIFPHYADDR
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*/
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};
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enum gre_state {
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GRE_S_IDLE = 0
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, GRE_S_IOCTL
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, GRE_S_DIE
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};
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#define __cacheline_aligned __aligned(CACHE_LINE_SIZE)
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struct gre_bufq {
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volatile int bq_prodidx;
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volatile int bq_considx;
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size_t bq_len __cacheline_aligned;
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size_t bq_lenmask;
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volatile int bq_drops;
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struct mbuf **bq_buf;
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};
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MALLOC_DECLARE(M_GRE_BUFQ);
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enum gre_msg {
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GRE_M_NONE = 0
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, GRE_M_SETFP
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, GRE_M_DELFP
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, GRE_M_STOP
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, GRE_M_OK
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, GRE_M_ERR
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};
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struct gre_softc {
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struct ifnet sc_if;
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kmutex_t sc_mtx;
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kcondvar_t sc_condvar;
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kcondvar_t sc_fp_condvar;
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struct gre_bufq sc_snd;
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struct gre_soparm sc_soparm;
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volatile enum gre_state sc_state;
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volatile int sc_waiters;
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volatile int sc_fp_waiters;
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void *sc_si;
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struct evcnt sc_recv_ev;
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struct evcnt sc_send_ev;
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struct evcnt sc_block_ev;
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struct evcnt sc_error_ev;
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struct evcnt sc_pullup_ev;
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struct evcnt sc_unsupp_ev;
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struct evcnt sc_oflow_ev;
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file_t * volatile sc_fp;
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volatile enum gre_msg sc_msg;
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int sc_fd;
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};
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struct gre_h {
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uint16_t flags; /* GRE flags */
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uint16_t ptype; /* protocol type of payload typically
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* ethernet protocol type
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*/
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/*
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* from here on: fields are optional, presence indicated by flags
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*
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u_int_16 checksum checksum (one-complements of GRE header
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and payload
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Present if (ck_pres | rt_pres == 1).
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Valid if (ck_pres == 1).
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u_int_16 offset offset from start of routing filed to
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first octet of active SRE (see below).
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Present if (ck_pres | rt_pres == 1).
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Valid if (rt_pres == 1).
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u_int_32 key inserted by encapsulator e.g. for
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authentication
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Present if (key_pres ==1 ).
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u_int_32 seq_num Sequence number to allow for packet order
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Present if (seq_pres ==1 ).
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struct gre_sre[] routing Routing fileds (see below)
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Present if (rt_pres == 1)
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*/
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} __packed;
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#define GRE_CP 0x8000 /* Checksum Present */
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#define GRE_RP 0x4000 /* Routing Present */
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#define GRE_KP 0x2000 /* Key Present */
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#define GRE_SP 0x1000 /* Sequence Present */
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#define GRE_SS 0x0800 /* Strict Source Route */
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/*
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* gre_sre defines a Source route Entry. These are needed if packets
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* should be routed over more than one tunnel hop by hop
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*/
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struct gre_sre {
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uint16_t sre_family; /* address family */
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u_char sre_offset; /* offset to first octet of active entry */
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u_char sre_length; /* number of octets in the SRE.
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sre_lengthl==0 -> last entry. */
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u_char *sre_rtinfo; /* the routing information */
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};
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#define GRE_TTL 30
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extern int ip_gre_ttl;
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#endif /* _KERNEL */
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/*
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* ioctls needed to manipulate the interface
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*/
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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 GRESSOCK _IOW('i' , 107, struct ifreq)
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#define GREDSOCK _IOW('i' , 108, struct ifreq)
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#endif /* !_NET_IF_GRE_H_ */
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