mirror of
https://github.com/the-tcpdump-group/tcpdump.git
synced 2024-12-12 03:13:29 +08:00
94f232c1ab
As Guy Harris points out in bug report GH #1022, the function has been a
busy no-op since commit e6c39e6 in 2010. While at it, fixup the Python
code to work on Python 3:
for i in range(len(crc_table)/8):
TypeError: 'float' object cannot be interpreted as an integer
575 lines
14 KiB
C
575 lines
14 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
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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: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Support for splitting captures into multiple files with a maximum
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* file size:
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*
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* Copyright (c) 2001
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* Seth Webster <swebster@sst.ll.mit.edu>
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include <setjmp.h>
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#include "netdissect-stdinc.h"
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#include "netdissect.h"
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#include "addrtoname.h"
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#include "print.h"
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#include "netdissect-alloc.h"
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#include "pcap-missing.h"
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struct printer {
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if_printer f;
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int type;
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};
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static const struct printer printers[] = {
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#ifdef DLT_APPLE_IP_OVER_IEEE1394
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{ ap1394_if_print, DLT_APPLE_IP_OVER_IEEE1394 },
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#endif
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{ arcnet_if_print, DLT_ARCNET },
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#ifdef DLT_ARCNET_LINUX
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{ arcnet_linux_if_print, DLT_ARCNET_LINUX },
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#endif
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{ atm_if_print, DLT_ATM_RFC1483 },
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#ifdef DLT_DSA_TAG_BRCM
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{ brcm_tag_if_print, DLT_DSA_TAG_BRCM },
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#endif
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#ifdef DLT_DSA_TAG_BRCM_PREPEND
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{ brcm_tag_prepend_if_print, DLT_DSA_TAG_BRCM_PREPEND },
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#endif
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#ifdef DLT_BLUETOOTH_HCI_H4_WITH_PHDR
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{ bt_if_print, DLT_BLUETOOTH_HCI_H4_WITH_PHDR},
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#endif
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#ifdef DLT_C_HDLC
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{ chdlc_if_print, DLT_C_HDLC },
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#endif
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#ifdef DLT_HDLC
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{ chdlc_if_print, DLT_HDLC },
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#endif
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#ifdef DLT_ATM_CLIP
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{ cip_if_print, DLT_ATM_CLIP },
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#endif
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#ifdef DLT_CIP
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{ cip_if_print, DLT_CIP },
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#endif
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#ifdef DLT_DSA_TAG_DSA
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{ dsa_if_print, DLT_DSA_TAG_DSA },
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#endif
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#ifdef DLT_DSA_TAG_EDSA
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{ edsa_if_print, DLT_DSA_TAG_EDSA },
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#endif
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#ifdef DLT_ENC
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{ enc_if_print, DLT_ENC },
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#endif
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{ ether_if_print, DLT_EN10MB },
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{ fddi_if_print, DLT_FDDI },
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#ifdef DLT_FR
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{ fr_if_print, DLT_FR },
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#endif
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#ifdef DLT_FRELAY
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{ fr_if_print, DLT_FRELAY },
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#endif
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#ifdef DLT_IEEE802_11
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{ ieee802_11_if_print, DLT_IEEE802_11},
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#endif
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#ifdef DLT_IEEE802_11_RADIO_AVS
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{ ieee802_11_radio_avs_if_print, DLT_IEEE802_11_RADIO_AVS },
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#endif
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#ifdef DLT_IEEE802_11_RADIO
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{ ieee802_11_radio_if_print, DLT_IEEE802_11_RADIO },
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#endif
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#ifdef DLT_IEEE802_15_4
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{ ieee802_15_4_if_print, DLT_IEEE802_15_4 },
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#endif
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#ifdef DLT_IEEE802_15_4_NOFCS
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{ ieee802_15_4_if_print, DLT_IEEE802_15_4_NOFCS },
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#endif
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#ifdef DLT_IEEE802_15_4_TAP
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{ ieee802_15_4_tap_if_print, DLT_IEEE802_15_4_TAP },
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#endif
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#ifdef DLT_IP_OVER_FC
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{ ipfc_if_print, DLT_IP_OVER_FC },
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#endif
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#ifdef DLT_IPNET
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{ ipnet_if_print, DLT_IPNET },
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#endif
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#ifdef DLT_IPOIB
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{ ipoib_if_print, DLT_IPOIB },
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#endif
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#ifdef DLT_JUNIPER_ATM1
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{ juniper_atm1_if_print, DLT_JUNIPER_ATM1 },
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#endif
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#ifdef DLT_JUNIPER_ATM2
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{ juniper_atm2_if_print, DLT_JUNIPER_ATM2 },
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#endif
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#ifdef DLT_JUNIPER_CHDLC
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{ juniper_chdlc_if_print, DLT_JUNIPER_CHDLC },
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#endif
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#ifdef DLT_JUNIPER_ES
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{ juniper_es_if_print, DLT_JUNIPER_ES },
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#endif
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#ifdef DLT_JUNIPER_ETHER
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{ juniper_ether_if_print, DLT_JUNIPER_ETHER },
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#endif
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#ifdef DLT_JUNIPER_FRELAY
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{ juniper_frelay_if_print, DLT_JUNIPER_FRELAY },
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#endif
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#ifdef DLT_JUNIPER_GGSN
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{ juniper_ggsn_if_print, DLT_JUNIPER_GGSN },
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#endif
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#ifdef DLT_JUNIPER_MFR
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{ juniper_mfr_if_print, DLT_JUNIPER_MFR },
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#endif
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#ifdef DLT_JUNIPER_MLFR
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{ juniper_mlfr_if_print, DLT_JUNIPER_MLFR },
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#endif
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#ifdef DLT_JUNIPER_MLPPP
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{ juniper_mlppp_if_print, DLT_JUNIPER_MLPPP },
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#endif
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#ifdef DLT_JUNIPER_MONITOR
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{ juniper_monitor_if_print, DLT_JUNIPER_MONITOR },
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#endif
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#ifdef DLT_JUNIPER_PPP
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{ juniper_ppp_if_print, DLT_JUNIPER_PPP },
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#endif
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#ifdef DLT_JUNIPER_PPPOE_ATM
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{ juniper_pppoe_atm_if_print, DLT_JUNIPER_PPPOE_ATM },
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#endif
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#ifdef DLT_JUNIPER_PPPOE
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{ juniper_pppoe_if_print, DLT_JUNIPER_PPPOE },
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#endif
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#ifdef DLT_JUNIPER_SERVICES
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{ juniper_services_if_print, DLT_JUNIPER_SERVICES },
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#endif
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#ifdef DLT_LTALK
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{ ltalk_if_print, DLT_LTALK },
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#endif
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#ifdef DLT_MFR
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{ mfr_if_print, DLT_MFR },
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#endif
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#ifdef DLT_NETANALYZER
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{ netanalyzer_if_print, DLT_NETANALYZER },
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#endif
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#ifdef DLT_NETANALYZER_TRANSPARENT
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{ netanalyzer_transparent_if_print, DLT_NETANALYZER_TRANSPARENT },
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#endif
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#ifdef DLT_NFLOG
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{ nflog_if_print, DLT_NFLOG},
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#endif
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{ null_if_print, DLT_NULL },
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#ifdef DLT_LOOP
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{ null_if_print, DLT_LOOP },
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#endif
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#ifdef DLT_PFLOG
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{ pflog_if_print, DLT_PFLOG },
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#endif
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#ifdef DLT_PKTAP
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{ pktap_if_print, DLT_PKTAP },
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#endif
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#ifdef DLT_PPI
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{ ppi_if_print, DLT_PPI },
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#endif
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#ifdef DLT_PPP_BSDOS
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{ ppp_bsdos_if_print, DLT_PPP_BSDOS },
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#endif
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#ifdef DLT_PPP_SERIAL
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{ ppp_hdlc_if_print, DLT_PPP_SERIAL },
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#endif
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{ ppp_if_print, DLT_PPP },
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#ifdef DLT_PPP_PPPD
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{ ppp_if_print, DLT_PPP_PPPD },
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#endif
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#ifdef DLT_PPP_ETHER
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{ pppoe_if_print, DLT_PPP_ETHER },
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#endif
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#ifdef DLT_PRISM_HEADER
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{ prism_if_print, DLT_PRISM_HEADER },
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#endif
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{ raw_if_print, DLT_RAW },
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#ifdef DLT_IPV4
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{ raw_if_print, DLT_IPV4 },
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#endif
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#ifdef DLT_IPV6
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{ raw_if_print, DLT_IPV6 },
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#endif
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#ifdef DLT_SLIP_BSDOS
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{ sl_bsdos_if_print, DLT_SLIP_BSDOS },
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#endif
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{ sl_if_print, DLT_SLIP },
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#ifdef DLT_LINUX_SLL
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{ sll_if_print, DLT_LINUX_SLL },
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#endif
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#ifdef DLT_LINUX_SLL2
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{ sll2_if_print, DLT_LINUX_SLL2 },
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#endif
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#ifdef DLT_SUNATM
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{ sunatm_if_print, DLT_SUNATM },
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#endif
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#ifdef DLT_SYMANTEC_FIREWALL
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{ symantec_if_print, DLT_SYMANTEC_FIREWALL },
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#endif
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{ token_if_print, DLT_IEEE802 },
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#ifdef DLT_USB_LINUX
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{ usb_linux_48_byte_if_print, DLT_USB_LINUX},
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#endif /* DLT_USB_LINUX */
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#ifdef DLT_USB_LINUX_MMAPPED
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{ usb_linux_64_byte_if_print, DLT_USB_LINUX_MMAPPED},
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#endif /* DLT_USB_LINUX_MMAPPED */
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#ifdef DLT_VSOCK
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{ vsock_if_print, DLT_VSOCK },
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#endif
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{ NULL, 0 },
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};
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void
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init_print(netdissect_options *ndo, uint32_t localnet, uint32_t mask)
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{
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init_addrtoname(ndo, localnet, mask);
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}
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if_printer
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lookup_printer(int type)
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{
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const struct printer *p;
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for (p = printers; p->f; ++p)
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if (type == p->type)
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return p->f;
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#if defined(DLT_USER2) && defined(DLT_PKTAP)
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/*
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* Apple incorrectly chose to use DLT_USER2 for their PKTAP
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* header.
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*
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* We map DLT_PKTAP, whether it's DLT_USER2 as it is on Darwin-
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* based OSes or the same value as LINKTYPE_PKTAP as it is on
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* other OSes, to LINKTYPE_PKTAP, so files written with
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* this version of libpcap for a DLT_PKTAP capture have a link-
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* layer header type of LINKTYPE_PKTAP.
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*
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* However, files written on OS X Mavericks for a DLT_PKTAP
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* capture have a link-layer header type of LINKTYPE_USER2.
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* If we don't have a printer for DLT_USER2, and type is
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* DLT_USER2, we look up the printer for DLT_PKTAP and use
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* that.
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*/
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if (type == DLT_USER2) {
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for (p = printers; p->f; ++p)
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if (DLT_PKTAP == p->type)
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return p->f;
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}
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#endif
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return NULL;
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/* NOTREACHED */
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}
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int
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has_printer(int type)
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{
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return (lookup_printer(type) != NULL);
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}
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if_printer
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get_if_printer(int type)
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{
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if_printer printer;
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printer = lookup_printer(type);
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if (printer == NULL)
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printer = unsupported_if_print;
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return printer;
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}
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#ifdef ENABLE_INSTRUMENT_FUNCTIONS
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extern int profile_func_level;
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static int pretty_print_packet_level = -1;
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#endif
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void
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pretty_print_packet(netdissect_options *ndo, const struct pcap_pkthdr *h,
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const u_char *sp, u_int packets_captured)
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{
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u_int hdrlen = 0;
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int invalid_header = 0;
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if (ndo->ndo_print_sampling && packets_captured % ndo->ndo_print_sampling != 0)
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return;
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#ifdef ENABLE_INSTRUMENT_FUNCTIONS
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if (pretty_print_packet_level == -1)
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pretty_print_packet_level = profile_func_level;
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#endif
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if (ndo->ndo_packet_number)
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ND_PRINT("%5u ", packets_captured);
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/* Sanity checks on packet length / capture length */
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if (h->caplen == 0) {
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invalid_header = 1;
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ND_PRINT("[Invalid header: caplen==0");
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}
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if (h->len == 0) {
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if (!invalid_header) {
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invalid_header = 1;
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ND_PRINT("[Invalid header:");
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} else
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ND_PRINT(",");
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ND_PRINT(" len==0");
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} else if (h->len < h->caplen) {
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if (!invalid_header) {
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invalid_header = 1;
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ND_PRINT("[Invalid header:");
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} else
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ND_PRINT(",");
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ND_PRINT(" len(%u) < caplen(%u)", h->len, h->caplen);
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}
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if (h->caplen > MAXIMUM_SNAPLEN) {
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if (!invalid_header) {
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invalid_header = 1;
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ND_PRINT("[Invalid header:");
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} else
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ND_PRINT(",");
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ND_PRINT(" caplen(%u) > %u", h->caplen, MAXIMUM_SNAPLEN);
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}
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if (h->len > MAXIMUM_SNAPLEN) {
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if (!invalid_header) {
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invalid_header = 1;
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ND_PRINT("[Invalid header:");
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} else
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ND_PRINT(",");
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ND_PRINT(" len(%u) > %u", h->len, MAXIMUM_SNAPLEN);
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}
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if (invalid_header) {
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ND_PRINT("]\n");
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return;
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}
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/*
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* At this point:
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* capture length != 0,
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* packet length != 0,
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* capture length <= MAXIMUM_SNAPLEN,
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* packet length <= MAXIMUM_SNAPLEN,
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* packet length >= capture length.
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*
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* Currently, there is no D-Bus printer, thus no need for
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* bigger lengths.
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*/
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/*
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* The header /usr/include/pcap/pcap.h in OpenBSD declares h->ts as
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* struct bpf_timeval, not struct timeval. The former comes from
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* /usr/include/net/bpf.h and uses 32-bit unsigned types instead of
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* the types used in struct timeval.
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*/
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struct timeval tvbuf;
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tvbuf.tv_sec = h->ts.tv_sec;
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tvbuf.tv_usec = h->ts.tv_usec;
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ts_print(ndo, &tvbuf);
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/*
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* Printers must check that they're not walking off the end of
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* the packet.
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* Rather than pass it all the way down, we set this member
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* of the netdissect_options structure.
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*/
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ndo->ndo_snapend = sp + h->caplen;
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ndo->ndo_packetp = sp;
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ndo->ndo_protocol = "";
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ndo->ndo_ll_hdr_len = 0;
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switch (setjmp(ndo->ndo_early_end)) {
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case 0:
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/* Print the packet. */
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(ndo->ndo_if_printer)(ndo, h, sp);
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break;
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case ND_TRUNCATED:
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/* A printer quit because the packet was truncated; report it */
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nd_print_trunc(ndo);
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/* Print the full packet */
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ndo->ndo_ll_hdr_len = 0;
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#ifdef ENABLE_INSTRUMENT_FUNCTIONS
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/* truncation => reassignment */
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profile_func_level = pretty_print_packet_level;
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#endif
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break;
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}
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hdrlen = ndo->ndo_ll_hdr_len;
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/*
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* Empty the stack of packet information, freeing all pushed buffers;
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* if we got here by a printer quitting, we need to release anything
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* that didn't get released because we longjmped out of the code
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* before it popped the packet information.
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*/
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nd_pop_all_packet_info(ndo);
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/*
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* Restore the original snapend, as a printer might have
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* changed it.
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*/
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ndo->ndo_snapend = sp + h->caplen;
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if (ndo->ndo_Xflag) {
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/*
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* Print the raw packet data in hex and ASCII.
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*/
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if (ndo->ndo_Xflag > 1) {
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/*
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* Include the link-layer header.
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*/
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hex_and_ascii_print(ndo, "\n\t", sp, h->caplen);
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} else {
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/*
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* Don't include the link-layer header - and if
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* we have nothing past the link-layer header,
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* print nothing.
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*/
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if (h->caplen > hdrlen)
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hex_and_ascii_print(ndo, "\n\t", sp + hdrlen,
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h->caplen - hdrlen);
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}
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} else if (ndo->ndo_xflag) {
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/*
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* Print the raw packet data in hex.
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*/
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if (ndo->ndo_xflag > 1) {
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/*
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* Include the link-layer header.
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*/
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hex_print(ndo, "\n\t", sp, h->caplen);
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} else {
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/*
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* Don't include the link-layer header - and if
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* we have nothing past the link-layer header,
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* print nothing.
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*/
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if (h->caplen > hdrlen)
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hex_print(ndo, "\n\t", sp + hdrlen,
|
|
h->caplen - hdrlen);
|
|
}
|
|
} else if (ndo->ndo_Aflag) {
|
|
/*
|
|
* Print the raw packet data in ASCII.
|
|
*/
|
|
if (ndo->ndo_Aflag > 1) {
|
|
/*
|
|
* Include the link-layer header.
|
|
*/
|
|
ascii_print(ndo, sp, h->caplen);
|
|
} else {
|
|
/*
|
|
* Don't include the link-layer header - and if
|
|
* we have nothing past the link-layer header,
|
|
* print nothing.
|
|
*/
|
|
if (h->caplen > hdrlen)
|
|
ascii_print(ndo, sp + hdrlen, h->caplen - hdrlen);
|
|
}
|
|
}
|
|
|
|
ND_PRINT("\n");
|
|
nd_free_all(ndo);
|
|
}
|
|
|
|
/*
|
|
* By default, print the specified data out in hex and ASCII.
|
|
*/
|
|
static void
|
|
ndo_default_print(netdissect_options *ndo, const u_char *bp, u_int length)
|
|
{
|
|
hex_and_ascii_print(ndo, "\n\t", bp, length); /* pass on lf and indentation string */
|
|
}
|
|
|
|
/* VARARGS */
|
|
static void NORETURN PRINTFLIKE(3, 4)
|
|
ndo_error(netdissect_options *ndo, status_exit_codes_t status,
|
|
FORMAT_STRING(const char *fmt), ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if (ndo->program_name)
|
|
(void)fprintf(stderr, "%s: ", ndo->program_name);
|
|
va_start(ap, fmt);
|
|
(void)vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
if (*fmt) {
|
|
fmt += strlen(fmt);
|
|
if (fmt[-1] != '\n')
|
|
(void)fputc('\n', stderr);
|
|
}
|
|
nd_cleanup();
|
|
exit(status);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/* VARARGS */
|
|
static void PRINTFLIKE(2, 3)
|
|
ndo_warning(netdissect_options *ndo, FORMAT_STRING(const char *fmt), ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if (ndo->program_name)
|
|
(void)fprintf(stderr, "%s: ", ndo->program_name);
|
|
(void)fprintf(stderr, "WARNING: ");
|
|
va_start(ap, fmt);
|
|
(void)vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
if (*fmt) {
|
|
fmt += strlen(fmt);
|
|
if (fmt[-1] != '\n')
|
|
(void)fputc('\n', stderr);
|
|
}
|
|
}
|
|
|
|
/* VARARGS */
|
|
static int PRINTFLIKE(2, 3)
|
|
ndo_printf(netdissect_options *ndo, FORMAT_STRING(const char *fmt), ...)
|
|
{
|
|
va_list args;
|
|
int ret;
|
|
|
|
va_start(args, fmt);
|
|
ret = vfprintf(stdout, fmt, args);
|
|
va_end(args);
|
|
|
|
if (ret < 0)
|
|
ndo_error(ndo, S_ERR_ND_WRITE_FILE,
|
|
"Unable to write output: %s", pcap_strerror(errno));
|
|
return (ret);
|
|
}
|
|
|
|
void
|
|
ndo_set_function_pointers(netdissect_options *ndo)
|
|
{
|
|
ndo->ndo_default_print=ndo_default_print;
|
|
ndo->ndo_printf=ndo_printf;
|
|
ndo->ndo_error=ndo_error;
|
|
ndo->ndo_warning=ndo_warning;
|
|
}
|