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470 lines
17 KiB
C
470 lines
17 KiB
C
/*-
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* Copyright (c) 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)clnp.h 8.2 (Berkeley) 4/16/94
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* $Id: clnp.h,v 1.3 1994/08/21 06:14:13 paul Exp $
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*/
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#ifndef _NETISO_CLNP_H_
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#define _NETISO_CLNP_H_
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/***********************************************************
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Copyright IBM Corporation 1987
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of IBM not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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******************************************************************/
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/*
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* ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
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*/
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/* $Header: /home/ncvs/src/sys/netiso/clnp.h,v 1.3 1994/08/21 06:14:13 paul Exp $ */
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/* $Source: /home/ncvs/src/sys/netiso/clnp.h,v $ */
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/* should be config option but cpp breaks with too many #defines */
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#define DECBIT
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/*
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* Return true if the mbuf is a cluster mbuf
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*/
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#define IS_CLUSTER(m) ((m)->m_flags & M_EXT)
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/*
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* Move the halfword into the two characters
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*/
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#define HTOC(msb, lsb, hword)\
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(msb) = (u_char)((hword) >> 8);\
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(lsb) = (u_char)((hword) & 0xff)
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/*
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* Move the two charcters into the halfword
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*/
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#define CTOH(msb, lsb, hword)\
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(hword) = ((msb) << 8) | (lsb)
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/*
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* Return true if the checksum has been set - ie. the checksum is
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* not zero
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*/
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#define CKSUM_REQUIRED(clnp)\
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(((clnp)->cnf_cksum_msb != 0) || ((clnp)->cnf_cksum_lsb != 0))
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/*
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* Fixed part of clnp header
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*/
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struct clnp_fixed {
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u_char cnf_proto_id; /* network layer protocol identifier */
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u_char cnf_hdr_len; /* length indicator (octets) */
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u_char cnf_vers; /* version/protocol identifier extension */
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u_char cnf_ttl; /* lifetime (500 milliseconds) */
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u_char cnf_type; /* type code */
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/* Includes err_ok, more_segs, and seg_ok */
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u_char cnf_seglen_msb; /* pdu segment length (octets) high byte */
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u_char cnf_seglen_lsb; /* pdu segment length (octets) low byte */
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u_char cnf_cksum_msb; /* checksum high byte */
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u_char cnf_cksum_lsb; /* checksum low byte */
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};
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#define CNF_TYPE 0x1f
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#define CNF_ERR_OK 0x20
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#define CNF_MORE_SEGS 0x40
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#define CNF_SEG_OK 0x80
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#define CLNP_CKSUM_OFF 0x07 /* offset of checksum */
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#define clnl_fixed clnp_fixed
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/*
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* Segmentation part of clnp header
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*/
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struct clnp_segment {
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u_short cng_id; /* data unit identifier */
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u_short cng_off; /* segment offset */
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u_short cng_tot_len; /* total length */
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};
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/*
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* Clnp fragment reassembly structures:
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*
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* All packets undergoing reassembly are linked together in
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* clnp_fragl structures. Each clnp_fragl structure contains a
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* pointer to the original clnp packet header, as well as a
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* list of packet fragments. Each packet fragment
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* is headed by a clnp_frag structure. This structure contains the
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* offset of the first and last byte of the fragment, as well as
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* a pointer to the data (an mbuf chain) of the fragment.
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*/
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/*
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* NOTE:
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* The clnp_frag structure is stored in an mbuf immedately preceeding
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* the fragment data. Since there are words in this struct,
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* it must be word aligned.
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*
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* NOTE:
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* All the fragment code assumes that the entire clnp header is
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* contained in the first mbuf.
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*/
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struct clnp_frag {
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u_int cfr_first; /* offset of first byte of this frag */
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u_int cfr_last; /* offset of last byte of this frag */
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u_int cfr_bytes; /* bytes to shave to get to data */
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struct mbuf *cfr_data; /* ptr to data for this frag */
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struct clnp_frag *cfr_next; /* next fragment in list */
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};
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struct clnp_fragl {
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struct iso_addr cfl_src; /* source of the pkt */
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struct iso_addr cfl_dst; /* destination of the pkt */
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u_short cfl_id; /* id of the pkt */
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u_char cfl_ttl; /* current ttl of pkt */
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u_short cfl_last; /* offset of last byte of packet */
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struct mbuf *cfl_orighdr; /* ptr to original header */
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struct clnp_frag *cfl_frags; /* linked list of fragments for pkt */
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struct clnp_fragl *cfl_next; /* next pkt being reassembled */
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};
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/*
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* The following structure is used to index into an options section
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* of a clnp datagram. These values can be used without worry that
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* offset or length fields are invalid or too big, etc. That is,
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* the consistancy of the options will be guaranteed before this
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* structure is filled in. Any pointer (field ending in p) is
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* actually the offset from the beginning of the mbuf the option
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* is contained in. A value of NULL for any pointer
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* means that the option is not present. The length any option
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* does not include the option code or option length fields.
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*/
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struct clnp_optidx {
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u_short cni_securep; /* ptr to beginning of security option */
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char cni_secure_len; /* length of entire security option */
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u_short cni_srcrt_s; /* offset of start of src rt option */
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u_short cni_srcrt_len; /* length of entire src rt option */
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u_short cni_recrtp; /* ptr to beginning of recrt option */
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char cni_recrt_len; /* length of entire recrt option */
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char cni_priorp; /* ptr to priority option */
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u_short cni_qos_formatp; /* ptr to format of qos option */
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char cni_qos_len; /* length of entire qos option */
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u_char cni_er_reason; /* reason from ER pdu option */
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/* ESIS options */
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u_short cni_esct; /* value from ISH ESCT option */
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u_short cni_netmaskp; /* ptr to beginning of netmask option */
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char cni_netmask_len; /* length of entire netmask option */
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u_short cni_snpamaskp; /* ptr to beginning of snpamask option */
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char cni_snpamask_len; /* length of entire snpamask option */
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};
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#define ER_INVALREAS 0xff /* code for invalid ER pdu discard reason */
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/* given an mbuf and addr of option, return offset from data of mbuf */
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#define CLNP_OPTTOOFF(m, opt)\
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((u_short) (opt - mtod(m, caddr_t)))
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/* given an mbuf and offset of option, return address of option */
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#define CLNP_OFFTOOPT(m, off)\
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((caddr_t) (mtod(m, caddr_t) + off))
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/* return true iff src route is valid */
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#define CLNPSRCRT_VALID(oidx)\
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((oidx) && (oidx->cni_srcrt_s))
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/* return the offset field of the src rt */
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#define CLNPSRCRT_OFF(oidx, options)\
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(*((u_char *)(CLNP_OFFTOOPT(options, oidx->cni_srcrt_s) + 1)))
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/* return the type field of the src rt */
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#define CLNPSRCRT_TYPE(oidx, options)\
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((u_char)(*(CLNP_OFFTOOPT(options, oidx->cni_srcrt_s))))
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/* return the length of the current address */
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#define CLNPSRCRT_CLEN(oidx, options)\
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((u_char)(*(CLNP_OFFTOOPT(options, oidx->cni_srcrt_s) + CLNPSRCRT_OFF(oidx, options) - 1)))
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/* return the address of the current address */
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#define CLNPSRCRT_CADDR(oidx, options)\
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((caddr_t)(CLNP_OFFTOOPT(options, oidx->cni_srcrt_s) + CLNPSRCRT_OFF(oidx, options)))
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/*
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* return true if the src route has run out of routes
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* this is true if the offset of next route is greater than the end of the rt
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*/
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#define CLNPSRCRT_TERM(oidx, options)\
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(CLNPSRCRT_OFF(oidx, options) > oidx->cni_srcrt_len)
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/*
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* Options a user can set/get
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*/
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#define CLNPOPT_FLAGS 0x01 /* flags: seg permitted, no er xmit, etc */
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#define CLNPOPT_OPTS 0x02 /* datagram options */
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/*
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* Values for particular datagram options
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*/
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#define CLNPOVAL_PAD 0xcc /* padding */
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#define CLNPOVAL_SECURE 0xc5 /* security */
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#define CLNPOVAL_SRCRT 0xc8 /* source routing */
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#define CLNPOVAL_RECRT 0xcb /* record route */
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#define CLNPOVAL_QOS 0xc3 /* quality of service */
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#define CLNPOVAL_PRIOR 0xcd /* priority */
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#define CLNPOVAL_ERREAS 0xc1 /* ER PDU ONLY: reason for discard */
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#define CLNPOVAL_SRCSPEC 0x40 /* source address specific */
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#define CLNPOVAL_DSTSPEC 0x80 /* destination address specific */
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#define CLNPOVAL_GLOBAL 0xc0 /* globally unique */
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/* Globally Unique QOS */
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#define CLNPOVAL_SEQUENCING 0x10 /* sequencing preferred */
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#define CLNPOVAL_CONGESTED 0x08 /* congestion experienced */
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#define CLNPOVAL_LOWDELAY 0x04 /* low transit delay */
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#define CLNPOVAL_PARTRT 0x00 /* partial source routing */
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#define CLNPOVAL_COMPRT 0x01 /* complete source routing */
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/*
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* Clnp flags used in a control block flags field.
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* NOTE: these must be out of the range of bits defined in ../net/raw_cb.h
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*/
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#define CLNP_NO_SEG 0x010 /* segmentation not permitted */
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#define CLNP_NO_ER 0x020 /* do not generate ERs */
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#define CLNP_SEND_RAW 0x080 /* send pkt as RAW DT rather than TP DT */
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#define CLNP_NO_CKSUM 0x100 /* don't use clnp checksum */
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#define CLNP_ECHO 0x200 /* send echo request */
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#define CLNP_NOCACHE 0x400 /* don't store cache information */
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#define CLNP_ECHOR 0x800 /* send echo reply */
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/* valid clnp flags */
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#define CLNP_VFLAGS (CLNP_SEND_RAW|CLNP_NO_SEG|CLNP_NO_ER|CLNP_NO_CKSUM\
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|CLNP_ECHO|CLNP_NOCACHE|CLNP_ECHOR)
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/*
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* Constants used by clnp
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*/
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#define CLNP_HDR_MIN (sizeof (struct clnp_fixed))
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#define CLNP_HDR_MAX (254)
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#define CLNP_TTL_UNITS 2 /* 500 milliseconds */
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#define CLNP_TTL 15*CLNP_TTL_UNITS /* time to live (seconds) */
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#define ISO8473_V1 0x01
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/*
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* Clnp packet types
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* In order to test raw clnp and tp/clnp simultaneously, a third type of
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* packet has been defined: CLNP_RAW. This is done so that the input
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* routine can switch to the correct input routine (rclnp_input or
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* tpclnp_input) based on the type field. If clnp had a higher level protocol
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* field, this would not be necessary.
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*/
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#define CLNP_DT 0x1C /* normal data */
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#define CLNP_ER 0x01 /* error report */
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#define CLNP_RAW 0x1D /* debug only */
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#define CLNP_EC 0x1E /* echo packet */
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#define CLNP_ECR 0x1F /* echo reply */
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/*
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* ER pdu error codes
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*/
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#define GEN_NOREAS 0x00 /* reason not specified */
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#define GEN_PROTOERR 0x01 /* protocol procedure error */
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#define GEN_BADCSUM 0x02 /* incorrect checksum */
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#define GEN_CONGEST 0x03 /* pdu discarded due to congestion */
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#define GEN_HDRSYNTAX 0x04 /* header syntax error */
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#define GEN_SEGNEEDED 0x05 /* segmentation needed, but not permitted */
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#define GEN_INCOMPLETE 0x06 /* incomplete pdu received */
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#define GEN_DUPOPT 0x07 /* duplicate option */
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/* address errors */
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#define ADDR_DESTUNREACH 0x80 /* destination address unreachable */
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#define ADDR_DESTUNKNOWN 0x81 /* destination address unknown */
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/* source routing */
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#define SRCRT_UNSPECERR 0x90 /* unspecified src rt error */
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#define SRCRT_SYNTAX 0x91 /* syntax error in src rt field */
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#define SRCRT_UNKNOWNADDR 0x92 /* unknown addr in src rt field */
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#define SRCRT_BADPATH 0x93 /* path not acceptable */
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/* lifetime */
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#define TTL_EXPTRANSIT 0xa0 /* lifetime expired during transit */
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#define TTL_EXPREASS 0xa1 /* lifetime expired during reassembly */
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/* pdu discarded */
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#define DISC_UNSUPPOPT 0xb0 /* unsupported option not specified? */
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#define DISC_UNSUPPVERS 0xb1 /* unsupported protocol version */
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#define DISC_UNSUPPSECURE 0xb2 /* unsupported security option */
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#define DISC_UNSUPPSRCRT 0xb3 /* unsupported src rt option */
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#define DISC_UNSUPPRECRT 0xb4 /* unsupported rec rt option */
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/* reassembly */
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#define REASS_INTERFERE 0xc0 /* reassembly interference */
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#define CLNP_ERRORS 22
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#ifdef KERNEL
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int clnp_er_index();
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#endif
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#ifdef CLNP_ER_CODES
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u_char clnp_er_codes[CLNP_ERRORS] = {
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GEN_NOREAS, GEN_PROTOERR, GEN_BADCSUM, GEN_CONGEST,
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GEN_HDRSYNTAX, GEN_SEGNEEDED, GEN_INCOMPLETE, GEN_DUPOPT,
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ADDR_DESTUNREACH, ADDR_DESTUNKNOWN,
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SRCRT_UNSPECERR, SRCRT_SYNTAX, SRCRT_UNKNOWNADDR, SRCRT_BADPATH,
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TTL_EXPTRANSIT, TTL_EXPREASS,
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DISC_UNSUPPOPT, DISC_UNSUPPVERS, DISC_UNSUPPSECURE,
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DISC_UNSUPPSRCRT, DISC_UNSUPPRECRT, REASS_INTERFERE };
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#endif
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#ifdef TROLL
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#define TR_DUPEND 0x01 /* duplicate end of fragment */
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#define TR_DUPPKT 0x02 /* duplicate entire packet */
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#define TR_DROPPKT 0x04 /* drop packet on output */
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#define TR_TRIM 0x08 /* trim bytes from packet */
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#define TR_CHANGE 0x10 /* change bytes in packet */
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#define TR_MTU 0x20 /* delta to change device mtu */
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#define TR_CHUCK 0x40 /* drop packet in rclnp_input */
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#define TR_BLAST 0x80 /* force rclnp_output to blast many packet */
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#define TR_RAWLOOP 0x100 /* make if_loop call clnpintr directly */
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struct troll {
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int tr_ops; /* operations to perform */
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float tr_dup_size; /* % to duplicate */
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float tr_dup_freq; /* frequency to duplicate packets */
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float tr_drop_freq; /* frequence to drop packets */
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int tr_mtu_adj; /* delta to adjust if mtu */
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int tr_blast_cnt; /* # of pkts to blast out */
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};
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#define SN_OUTPUT(clcp, m)\
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troll_output(clcp->clc_ifp, m, clcp->clc_firsthop, clcp->clc_rt)
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#define SN_MTU(ifp, rt) (((rt && rt->rt_rmx.rmx_mtu) ?\
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rt->rt_rmx.rmx_mtu : clnp_badmtu(ifp, rt, __LINE__, __FILE__))\
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- trollctl.tr_mtu_adj)
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#ifdef KERNEL
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extern float troll_random;
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#endif
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#else /* NO TROLL */
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#define SN_OUTPUT(clcp, m)\
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(*clcp->clc_ifp->if_output)(clcp->clc_ifp, m, clcp->clc_firsthop, clcp->clc_rt)
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#define SN_MTU(ifp, rt) (((rt && rt->rt_rmx.rmx_mtu) ?\
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rt->rt_rmx.rmx_mtu : clnp_badmtu(ifp, rt, __LINE__, __FILE__)))
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#endif /* TROLL */
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/*
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* Macro to remove an address from a clnp header
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*/
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#define CLNP_EXTRACT_ADDR(isoa, hoff, hend)\
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{\
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isoa.isoa_len = (u_char)*hoff;\
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if ((((++hoff) + isoa.isoa_len) > hend) ||\
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(isoa.isoa_len > 20) || (isoa.isoa_len == 0)) {\
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hoff = (caddr_t)0;\
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} else {\
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(void) bcopy(hoff, (caddr_t)isoa.isoa_genaddr, isoa.isoa_len);\
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hoff += isoa.isoa_len;\
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}\
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}
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/*
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* Macro to insert an address into a clnp header
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*/
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#define CLNP_INSERT_ADDR(hoff, isoa)\
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*hoff++ = (isoa).isoa_len;\
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(void) bcopy((caddr_t)((isoa).isoa_genaddr), hoff, (isoa).isoa_len);\
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hoff += (isoa).isoa_len;
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/*
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* Clnp hdr cache. Whenever a clnp packet is sent, a copy of the
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* header is made and kept in this cache. In addition to a copy of
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* the cached clnp hdr, the cache contains
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* information necessary to determine whether the new packet
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* to send requires a new header to be built.
|
|
*/
|
|
struct clnp_cache {
|
|
/* these fields are used to check the validity of the cache */
|
|
struct iso_addr clc_dst; /* destination of packet */
|
|
struct mbuf *clc_options; /* ptr to options mbuf */
|
|
int clc_flags; /* flags passed to clnp_output */
|
|
|
|
/* these fields are state that clnp_output requires to finish the pkt */
|
|
int clc_segoff; /* offset of seg part of header */
|
|
struct rtentry *clc_rt; /* ptr to rtentry (points into
|
|
the route structure) */
|
|
struct sockaddr *clc_firsthop; /* first hop of packet */
|
|
struct ifnet *clc_ifp; /* ptr to interface structure */
|
|
struct iso_ifaddr *clc_ifa; /* ptr to interface address */
|
|
struct mbuf *clc_hdr; /* cached pkt hdr (finally)! */
|
|
};
|
|
|
|
#ifndef satosiso
|
|
#define satosiso(sa)\
|
|
((struct sockaddr_iso *)(sa))
|
|
#endif
|
|
|
|
#ifdef KERNEL
|
|
caddr_t clnp_insert_addr();
|
|
struct iso_addr *clnp_srcaddr();
|
|
struct mbuf *clnp_reass();
|
|
#ifdef TROLL
|
|
struct troll trollctl;
|
|
#endif /* TROLL */
|
|
#endif /* KERNEL */
|
|
|
|
#endif
|