winpcap发送单个数据包的示例

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#define WIN32#define HAVE_REMOTE #include <stdio.h>#include "pcap.h"#include "Win32-Extensions.h"

</pre><pre code_snippet_id="1838127" snippet_file_name="blog_20160818_3_7307846" name="code" class="cpp">//第一次遇到，在变量声明的时候不是随时都可以的，vs2010下 要把变量声明放到最前面，否则会报错void genPacket(unsigned char *buf,int len){       int i=0;       //设置目标MAC地址为:01:01:01:01:01       for (i=0;i<6;i++)       {           buf[i]=0x01;       }       //设置源MAC地址为:02:02:02:02:02       for (i=6;i<12;i++)       {           buf[i]=0x02;       }       //设置协议标识为xc0xd，无任何实际意义       buf[12]=0xc;       buf[13]=0xd;        //填充数据包的内容        for(i=14;i<len;i++)       {                    buf[i]=i-14;       }} int main(){    pcap_if_t *alldevs;    pcap_if_t *d;    int inum;    int i=0;    pcap_t *adhandle;    char errbuf[PCAP_ERRBUF_SIZE];    int ret=-1;       int MaxPacketLen=100;    unsigned char *pBuf= (unsigned char *)malloc(MaxPacketLen);    memset(pBuf,0x0,MaxPacketLen);if (pcap_findalldevs_ex(PCAP_SRC_IF_STRING, NULL,&alldevs, errbuf) == -1)    {        fprintf(stderr,"Error in pcap_findalldevs: %s\n", errbuf);        exit(1);    }          for(d=alldevs; d; d=d->next)    {        printf("%d. %s", ++i, d->name);        if (d->description)            printf(" (%s)\n", d->description);        else            printf(" (No description available)\n");    }       if(i==0)    {        printf("\nNo interfaces found! Make sureWinPcap is installed.\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");               pcap_freealldevs(alldevs);        return -1;    }          for(d=alldevs, i=0; i< inum-1 ;d=d->next, i++);      if ( (adhandle= pcap_open(d->name, 65536,PCAP_OPENFLAG_PROMISCUOUS, 1000, NULL,errbuf) )== NULL)    {        fprintf(stderr,"\nUnable to open the adapter.%s is not supported by WinPcap\n", d->name);               pcap_freealldevs(alldevs);        return -1;    }        printf("\nlistening on %s...\n", d->description);              //获得生成的数据包，长度为MaxPacketLen    genPacket(pBuf,MaxPacketLen);     if ( (ret=pcap_sendpacket(adhandle,pBuf,MaxPacketLen)==-1)    {       printf("发送失败\n");       pcap_close(adhandle);        pcap_freealldevs(alldevs);        return -1;    }            free(pBuf);     pcap_close(adhandle);     pcap_freealldevs(alldevs);       return 0;}

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