用 Microsoft Visual C++ 创建一个使用 wpcap.dll 的应用程序,
用 Microsoft Visual C++ 创建一个使用 wpcap.dll 的应用程序,需要按一下步骤:
- 在每一个使用了库的源程序中,将 pcap.h 头文件包含(include)进来。
- 如果你在程序中使用了WinPcap中提供给Win32平台的特有的函数, 记得在预处理中加入WPCAP 的定义。
- 如果你的程序使用了WinPcap的远程捕获功能,那么在预处理定义中加入HAVE_REMOTE。不要直接把remote-ext.h直接加入到你的源文件中去。
- 设置VC++的链接器(Linker),把wpcap.lib库文件包含进来。wpcap.lib可以在WinPcap中找到。
- 设置VC++的链接器(Linker),把ws2_32.lib库文件包含进来。这个文件分布于C的编译器,并且包含了Windows的一些socket函数。本教程中的一些范例程序,会需要它。
记住以下几点:
- 要添加一个预处理定义,你需要打开Project菜单,选择Settings,然后选择C/C++选项卡,在General类下,你必须在Preprocessor Definitions下的文本框中添加定义。
- 要在一个VC++6.0工程中,添加一,个新的库,你必须打开Project菜单,选择Settings,然后选择Link选项卡,然后把新库的名字添加到Object/Library modules下的文本框中
- 要向VC++6.0中添加一个新的库所在的路径,你必须打开Tool菜单,选择Options,然后选择Directories选项卡,在Show directories下拉框中选择Library files,并且将新的路径添加到Directories中去
- 要向VC++6.0中添加一个新的包含文件所在的路径,你必须打开Tool菜单,选择Options,然后选择Directories选项卡,在Show directories下拉框中选择Include files,并且将新的路径添加到Directories中去
Packet Dump
这个程序会依据命令行参数,从网络适配器,或是从文件来读取数据包。如果没有提供源,那么程序会显示出所有可用的适配器,你可以选其中一个。当捕获过程开始,程序会打印数据包的时间戳,长度,原始内容。一旦被编译了,那么它将能运行于所有的Win32平台,当然,它也可以被编译成Unix平台的程序。
/* * Copyright (c) 1999 - 2005 NetGroup, Politecnico di Torino (Italy) * Copyright (c) 2005 - 2006 CACE Technologies, Davis (California) * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the Politecnico di Torino, CACE Technologies * nor the names of its contributors may be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #include <stdlib.h> #include <stdio.h> // // NOTE: remember to include WPCAP and HAVE_REMOTE among your // preprocessor definitions. // #include <pcap.h> #define LINE_LEN 16 main(int argc, char **argv) { pcap_if_t *alldevs, *d; pcap_t *fp; u_int inum, i=0; char errbuf[PCAP_ERRBUF_SIZE]; int res; struct pcap_pkthdr *header; const u_char *pkt_data; printf("pktdump_ex: prints the packets of the network using WinPcap./n"); printf(" Usage: pktdump_ex [-s source]/n/n" " Examples:/n" " pktdump_ex -s file://c:/temp/file.acp/n" " pktdump_ex -s rpcap:////Device//NPF_{C8736017-F3C3-4373-94AC-9A34B7DAD998}/n/n"); if(argc < 3) { printf("/nNo adapter selected: printing the device list:/n"); /* The user didn't provide a packet source: Retrieve the local device list */ if (pcap_findalldevs_ex(PCAP_SRC_IF_STRING, NULL, &alldevs, errbuf) == -1) { fprintf(stderr,"Error in pcap_findalldevs_ex: %s/n", errbuf); return -1; } /* Print the list */ for(d=alldevs; d; d=d->next) { printf("%d. %s/n ", ++i, d->name); if (d->description) printf(" (%s)/n", d->description); else printf(" (No description available)/n"); } if (i==0) { fprintf(stderr,"No interfaces found! Exiting./n"); return -1; } printf("Enter the interface number (1-%d):",i); scanf("%d", &inum); if (inum < 1 || inum > i) { printf("/nInterface number out of range./n"); /* Free the device list */ pcap_freealldevs(alldevs); return -1; } /* Jump to the selected adapter */ for (d=alldevs, i=0; i< inum-1 ;d=d->next, i++); /* Open the device */ if ( (fp= pcap_open(d->name, 100 /*snaplen*/, PCAP_OPENFLAG_PROMISCUOUS /*flags*/, 20 /*read timeout*/, NULL /* remote authentication */, errbuf) ) == NULL) { fprintf(stderr,"/nError opening adapter/n"); return -1; } } else { // Do not check for the switch type ('-s') if ( (fp= pcap_open(argv[2], 100 /*snaplen*/, PCAP_OPENFLAG_PROMISCUOUS /*flags*/, 20 /*read timeout*/, NULL /* remote authentication */, errbuf) ) == NULL) { fprintf(stderr,"/nError opening source: %s/n", errbuf); return -1; } } /* Read the packets */ while((res = pcap_next_ex( fp, &header, &pkt_data)) >= 0) { if(res == 0) /* Timeout elapsed */ continue; /* print pkt timestamp and pkt len */ printf("%ld:%ld (%ld)/n", header->ts.tv_sec, header->ts.tv_usec, header->len); /* Print the packet */ for (i=1; (i < header->caplen + 1 ) ; i++) { printf("%.2x ", pkt_data[i-1]); if ( (i % LINE_LEN) == 0) printf("/n"); } printf("/n/n"); } if(res == -1) { fprintf(stderr, "Error reading the packets: %s/n", pcap_geterr(fp)); return -1; } return 0; }