#include "pcap.h"
void packet_handler(u_char *param, const struct pcap_pkthdr *header, const u_char *pkt_data);
main()
{
pcap_if_t *alldevs;
pcap_if_t *d;
int inum;
int i=0;
pcap_t *adhandle;
char errbuf[PCAP_ERRBUF_SIZE];
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 sure WinPcap is installed.\n");
return -1;
}
printf("Enter the interface number (1-%d):",i);
scanf("%d", &inum);
if(inum < 1 || inum > i)
{
pcap_freealldevs(alldevs);
return -1;
}
for(d=alldevs,i=0;i<inum-1;d=d->next,i++);
if((adhandle=pcap_open(d->name,65535,1,1000,NULL,errbuf))==NULL){
pcap_freealldevs(alldevs);
return -1;
}
printf("listening on %s .....\n",d->description);
pcap_freealldevs(alldevs);
u_char sztext[]="测试";
pcap_loop(adhandle,0,packet_handler,sztext);
return 0;
}
/*
第一个参数用户参数通过pcap_loop传过来的参数
第二个参数是捕获到的数据包的头信息
第三个参数是捕获到的数据包的内容
*/
void packet_handler(u_char *param,const struct pcap_pkthdr *header,const u_char *pkt_data){
struct tm *ltime;
time_t local_tv_sec=header->ts.tv_sec;
char timestr[16];
ltime=localtime(&local_tv_sec);
strftime(timestr,sizeof(timestr),"%H:%M:%S",ltime);
printf("%s,%.6d len:%d content: %s param: %s\n",timestr,header->ts.tv_usec,header->len,pkt_data,param);
}
基于winpcap编写的第三个程序
最新推荐文章于 2020-05-27 15:49:24 发布