forked from osmocom/wireshark
66 lines
2.5 KiB
C
66 lines
2.5 KiB
C
/** @file
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*
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* Wrapper around libpcap/WinPcap's pcap.h.
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*
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* If HAVE_PCAP_REMOTE is defined, it forces the WinPcap header files to
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* define things required for remote capture, by defining HAVE_REMOTE.
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*
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* With all versions of the WinPcap SDK, if:
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*
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* 1) you are building with any current WinPcap SDK;
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* 2) you do not define HAVE_REMOTE before including pcap.h (or
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* pcap/pcap.h);
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* 3) you define a struct pcap_stat and pass it to a call to
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* pcap_stats();
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* 4) the system you're running on has WinPcap, rather than Npcap,
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* installed;
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*
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* whatever is in memory after the struct pcap_stat may get overwritten,
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* with unpredictable results, because the pcap_stats() implementation for
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* WinPcap will assume that the structure has the additional members that
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* are added if and only if HAVE_REMOTE is defined, and will fill them in,
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* even if they're not there.
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*
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* Yes, this is q WinPcap bug; if your project has a public header file
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* that checks or otherwise uses a #define that's defined by your project's
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* configuration process, and don't ensure that it's always defined
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* appropriately when that header file is included, before its first use,
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* you have made a mistake.
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*
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* In libpcap 1.7.0 and later, the pcap_stats() implementation for WinPcap
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* will not fill those fields in; however, no WinPcap implementation was
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* based on that recent a libpcap release, so they all have the bug.
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*
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* Npcap was originally based on libpcap 1.8.0, and later releases are
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* based on later releases of libpcap, so they will not overwrite memory
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* past the end of the structure.
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*
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* The header file bug is fixed in libpcap 1.9.0 or later - the fields
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* are present on Windows, regardless of whether HAVE_REMOTE is defined
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* or not when the header is included (and are not present on UN*X), so
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* if you build with an SDK with libpcap 1.9.0 or later headers, you
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* do not need to define HAVE_REMOTE before including pcap.h (including it
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* will make no difference).
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*
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* No version of the WinPcap SDK provided libpcap 1.9.0-or-later headers.
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* The Npcap SDK, as of SDK version 1.04, provides them, so this is
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* only necessary for building with the WinPcap SDK.
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 2007 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef __WSPCAP_H__
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#define __WSPCAP_H__
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#ifdef HAVE_PCAP_REMOTE
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#define HAVE_REMOTE
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#endif
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#include <pcap.h>
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#endif /* __WSPCAP_H__ */
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