1 /* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */ 2 /* 3 * Copyright (c) 1993, 1994, 1995, 1996, 1997 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the Computer Systems 17 * Engineering Group at Lawrence Berkeley Laboratory. 18 * 4. Neither the name of the University nor of the Laboratory may be used 19 * to endorse or promote products derived from this software without 20 * specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifndef lib_pcap_socket_h 36 #define lib_pcap_socket_h 37 38 /* 39 * Some minor differences between sockets on various platforms. 40 * We include whatever sockets are needed for Internet-protocol 41 * socket access on UN*X and Windows. 42 */ 43 #ifdef _WIN32 44 /* Need windef.h for defines used in winsock2.h under MingW32 */ 45 #ifdef __MINGW32__ 46 #include <windef.h> 47 #endif 48 #include <winsock2.h> 49 #include <ws2tcpip.h> 50 51 /*! 52 * \brief In Winsock, a socket handle is of type SOCKET; in UN*X, it's 53 * a file descriptor, and therefore a signed integer. 54 * We define PCAP_SOCKET to be a signed integer on UN*X and a 55 * SOCKET on Windows, so that it can be used on both platforms. 56 * 57 * We used to use SOCKET rather than PCAP_SOCKET, but that collided 58 * with other software, such as barnyard2, which had their own 59 * definitions of SOCKET, so we changed it to PCAP_SOCKET. 60 * 61 * On Windows, this shouldn't break any APIs, as any code using 62 * the two active-mode APIs that return a socket handle would 63 * probably be assigning their return values to a SOCKET, and 64 * as, on Windows, we're defining PCAP_SOCKET as SOCKET, there 65 * would be no type clash. 66 */ 67 #ifndef PCAP_SOCKET 68 #define PCAP_SOCKET SOCKET 69 #endif 70 71 /* 72 * Winsock doesn't have this POSIX type; it's used for the 73 * tv_usec value of struct timeval. 74 */ 75 typedef long suseconds_t; 76 #else /* _WIN32 */ 77 #include <sys/types.h> 78 #include <sys/socket.h> 79 #include <netdb.h> /* for struct addrinfo/getaddrinfo() */ 80 #include <netinet/in.h> /* for sockaddr_in, in BSD at least */ 81 #include <arpa/inet.h> 82 83 /*! 84 * \brief In Winsock, a socket handle is of type SOCKET; in UN*Xes, 85 * it's a file descriptor, and therefore a signed integer. 86 * We define PCAP_SOCKET to be a signed integer on UN*X and a 87 * SOCKET on Windows, so that it can be used on both platforms. 88 * 89 * We used to use SOCKET rather than PCAP_SOCKET, but that collided 90 * with other software, such as barnyard2, which had their own 91 * definitions of SOCKET, so we changed it to PCAP_SOCKET. 92 * 93 * On UN*Xes, this might break code that uses one of the two 94 * active-mode APIs that return a socket handle if those programs 95 * were written to assign the return values of those APIs to a 96 * SOCKET, as we're no longer defining SOCKET. However, as 97 * those APIs are only provided if libpcap is built with remote 98 * capture support - which is not the default - and as they're 99 * somewhat painful to use, there's probably little if any code 100 * that needs to compile for UN*X and that uses them. If there 101 * *is* any such code, it could do 102 * 103 * #ifndef PCAP_SOCKET 104 * #ifdef _WIN32 105 * #define PCAP_SOCKET SOCKET 106 * #else 107 * #defube PCAP_SOCKET int 108 * #endif 109 * #endif 110 * 111 * and use PCAP_SOCKET. 112 */ 113 #ifndef PCAP_SOCKET 114 #define PCAP_SOCKET int 115 #endif 116 117 /*! 118 * \brief In Winsock, the error return if socket() fails is INVALID_SOCKET; 119 * in UN*X, it's -1. 120 * We define INVALID_SOCKET to be -1 on UN*X, so that it can be used on 121 * both platforms. 122 */ 123 #ifndef INVALID_SOCKET 124 #define INVALID_SOCKET -1 125 #endif 126 #endif /* _WIN32 */ 127 128 #endif /* lib_pcap_socket_h */ 129