68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
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/*************************************************************************
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> File Name : demo3.c
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> Author : TL Song
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> EMail : songtianlun@frytea.com
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> Created Time : Thu Feb 18 20:14:21 2021
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************************************************************************/
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#include <pcap.h>
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#include <time.h>
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#include <stdlib.h>
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#include <stdio.h>
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void getPacket(u_char * arg, const struct pcap_pkthdr * pkthdr, const u_char * packet)
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{
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int * id = (int *)arg;
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printf("id: %d\n", ++(*id));
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printf("Packet length: %d\n", pkthdr->len);
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printf("Number of bytes: %d\n", pkthdr->caplen);
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printf("Recieved time: %s", ctime((const time_t *)&pkthdr->ts.tv_sec));
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int i;
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for(i=0; i<pkthdr->len; ++i)
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{
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printf(" %02x", packet[i]);
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if( (i + 1) % 16 == 0 )
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{
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printf("\n");
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}
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}
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printf("\n\n");
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}
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int main()
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{
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char errBuf[PCAP_ERRBUF_SIZE], * devStr;
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/* get a device */
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devStr = pcap_lookupdev(errBuf);
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if(devStr)
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{
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printf("success: device: %s\n", devStr);
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}
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else
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{
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printf("error: %s\n", errBuf);
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exit(1);
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}
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/* open a device, wait until a packet arrives */
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pcap_t * device = pcap_open_live(devStr, 65535, 1, 0, errBuf);
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if(!device)
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{
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printf("error: pcap_open_live(): %s\n", errBuf);
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exit(1);
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}
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/* wait loop forever */
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int id = 0;
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pcap_loop(device, -1, getPacket, (u_char*)&id);
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pcap_close(device);
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return 0;
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}
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