446664c8d4
libpcap is BSD licensed, but Npcap has a non-free license (which does give Wireshark specific permission to redistribute it.) Due to the licensing requirements, third party packagers for Windows will either package a compiled version of libpcap that does not capture packets on Windows (vcpkg, Conan, MSYS2) or continue to package the last release of WinPcap (Fedora Linux MinGW.) On Windows, we compile using the headers from those packages, making sure not to link the non-functional DLLs, distribute Npcap separately as part of the installer, and load its wpcap.dll through run-time dynamic linking, checking for each needed function. Just add an internal copy of the latest release of the libpcap headers (1.10.5), and use it unconditionally when Windows cross-compiling or on MSYS2, or otherwise if libpcap headers aren't found. (On non Windows we will still require finding the library.) That's all we're actually doing on Windows and MSYS2 builds as it is; it also makes the Fedora MinGW builds use the latest API instead of using Npcap with the libpcap-1.0 / WinPcap 4.1.3 level API. Don't bother installing the libpcap or WinPcap packages from vcpkg, MSYS2, and Fedora MinGW, because we don't need them. Remove the advertising clause from the files with the original University of California, Berkeley clause, per https://ipira.berkeley.edu/sites/default/files/amendment_of_4-clause_bsd_software_license.pdf originally at ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change Other files (including pcap.h) have the provision but mentioning the Computer Systems Engineering Group at LBL; that might still apply (hopefully it does not.) If it *is* a problem, then it's always been a problem, because we've always distributed packages including these headers. Ping #20261
129 lines
5.0 KiB
C
129 lines
5.0 KiB
C
/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
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/*
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* Copyright (c) 1993, 1994, 1995, 1996, 1997
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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 Computer Systems
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* Engineering Group at Lawrence Berkeley Laboratory.
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* 4. Neither the name of the University nor of the Laboratory may be used
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* to endorse or promote products derived from this software without
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* 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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#ifndef lib_pcap_socket_h
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#define lib_pcap_socket_h
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/*
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* Some minor differences between sockets on various platforms.
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* We include whatever sockets are needed for Internet-protocol
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* socket access on UN*X and Windows.
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*/
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#ifdef _WIN32
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/* Need windef.h for defines used in winsock2.h under MingW32 */
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#ifdef __MINGW32__
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#include <windef.h>
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#endif
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#include <winsock2.h>
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#include <ws2tcpip.h>
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/*!
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* \brief In Winsock, a socket handle is of type SOCKET; in UN*X, it's
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* a file descriptor, and therefore a signed integer.
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* We define PCAP_SOCKET to be a signed integer on UN*X and a
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* SOCKET on Windows, so that it can be used on both platforms.
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*
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* We used to use SOCKET rather than PCAP_SOCKET, but that collided
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* with other software, such as barnyard2, which had their own
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* definitions of SOCKET, so we changed it to PCAP_SOCKET.
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*
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* On Windows, this shouldn't break any APIs, as any code using
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* the two active-mode APIs that return a socket handle would
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* probably be assigning their return values to a SOCKET, and
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* as, on Windows, we're defining PCAP_SOCKET as SOCKET, there
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* would be no type clash.
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*/
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#ifndef PCAP_SOCKET
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#define PCAP_SOCKET SOCKET
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#endif
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/*
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* Winsock doesn't have this POSIX type; it's used for the
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* tv_usec value of struct timeval.
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*/
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typedef long suseconds_t;
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#else /* _WIN32 */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h> /* for struct addrinfo/getaddrinfo() */
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#include <netinet/in.h> /* for sockaddr_in, in BSD at least */
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#include <arpa/inet.h>
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/*!
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* \brief In Winsock, a socket handle is of type SOCKET; in UN*Xes,
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* it's a file descriptor, and therefore a signed integer.
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* We define PCAP_SOCKET to be a signed integer on UN*X and a
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* SOCKET on Windows, so that it can be used on both platforms.
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*
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* We used to use SOCKET rather than PCAP_SOCKET, but that collided
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* with other software, such as barnyard2, which had their own
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* definitions of SOCKET, so we changed it to PCAP_SOCKET.
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*
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* On UN*Xes, this might break code that uses one of the two
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* active-mode APIs that return a socket handle if those programs
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* were written to assign the return values of those APIs to a
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* SOCKET, as we're no longer defining SOCKET. However, as
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* those APIs are only provided if libpcap is built with remote
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* capture support - which is not the default - and as they're
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* somewhat painful to use, there's probably little if any code
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* that needs to compile for UN*X and that uses them. If there
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* *is* any such code, it could do
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*
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* #ifndef PCAP_SOCKET
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* #ifdef _WIN32
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* #define PCAP_SOCKET SOCKET
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* #else
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* #defube PCAP_SOCKET int
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* #endif
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* #endif
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*
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* and use PCAP_SOCKET.
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*/
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#ifndef PCAP_SOCKET
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#define PCAP_SOCKET int
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#endif
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/*!
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* \brief In Winsock, the error return if socket() fails is INVALID_SOCKET;
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* in UN*X, it's -1.
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* We define INVALID_SOCKET to be -1 on UN*X, so that it can be used on
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* both platforms.
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*/
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#ifndef INVALID_SOCKET
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#define INVALID_SOCKET -1
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#endif
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#endif /* _WIN32 */
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#endif /* lib_pcap_socket_h */
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