满意答案
给你一个winpcap的示例代码，具体的可以根据自己的需求修改
#include
#include
#include
#define LINE_LEN 16
int 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]nn”
” Examples:n”
” pktdump_ex -s file.acpn”
” pktdump_ex -s \Device\NPF_{C8736017-F3C3-4373-94AC-9A34B7DAD998}nn”);
if(argc
{
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(&alldevs, errbuf) == -1)
{
fprintf(stderr,”Error in pcap_findalldevs_ex: %sn”, errbuf);
exit(1);
}
/* Print the list */
for(d=alldevs; d; d=d->next)
{
printf(“%d. %sn “, ++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 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; inext, i++);
/* Open the adapter */
if ((fp = pcap_open_live(d->name, // name of the device
65536, // portion of the packet to capture.
// 65536 grants that the whole packet will be captured on all the MACs.
1, // promiscuous mode (nonzero means promiscuous)
1000, // read timeout
errbuf // error buffer
)) == NULL)
{
fprintf(stderr,”nError opening adaptern”);
return -1;
}
}
else
{
/* Do not check for the switch type (‘-s’) */
if ((fp = pcap_open_live(argv[2], // name of the device
65536, // portion of the packet to capture.
// 65536 grants that the whole packet will be captured on all the MACs.
1, // promiscuous mode (nonzero means promiscuous)
1000, // read timeout
errbuf // error buffer
)) == NULL)
{
fprintf(stderr,”nError opening adaptern”);
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 caplen + 1 ) ; i++)
{
printf(“%.2x “, pkt_data[i-1]);
if ( (i % LINE_LEN) == 0) printf(“n”);
}
printf(“nn”);
}
if(res == -1)
{
printf(“Error reading the packets: %sn”, pcap_geterr(fp));
return -1;
}
pcap_close(fp);
return 0;
}
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