79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
|
#include <stdio.h>
|
||
|
|
#include <pcap.h>
|
||
|
|
|
||
|
|
#define LINE_LEN 16
|
||
|
|
|
||
|
|
void dispatcher_handler(u_char *, const struct pcap_pkthdr *, const u_char *);
|
||
|
|
|
||
|
|
int main(int argc, char **argv)
|
||
|
|
{
|
||
|
|
pcap_t *fp;
|
||
|
|
char errbuf[PCAP_ERRBUF_SIZE];
|
||
|
|
char source[PCAP_BUF_SIZE];
|
||
|
|
|
||
|
|
if(argc != 2){
|
||
|
|
|
||
|
|
printf("usage: %s filename", argv[0]);
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Create the source string according to the new WinPcap syntax */
|
||
|
|
if ( pcap_createsrcstr( source, // variable that will keep the source string
|
||
|
|
PCAP_SRC_FILE, // we want to open a file
|
||
|
|
NULL, // remote host
|
||
|
|
NULL, // port on the remote host
|
||
|
|
argv[1], // name of the file we want to open
|
||
|
|
errbuf // error buffer
|
||
|
|
) != 0)
|
||
|
|
{
|
||
|
|
fprintf(stderr,"\nError creating a source string\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Open the capture file */
|
||
|
|
if ( (fp= pcap_open(source, // name of the device
|
||
|
|
65536, // portion of the packet to capture
|
||
|
|
// 65536 guarantees that the whole packet will be captured on all the link layers
|
||
|
|
PCAP_OPENFLAG_PROMISCUOUS, // promiscuous mode
|
||
|
|
1000, // read timeout
|
||
|
|
NULL, // authentication on the remote machine
|
||
|
|
errbuf // error buffer
|
||
|
|
) ) == NULL)
|
||
|
|
{
|
||
|
|
fprintf(stderr,"\nUnable to open the file %s.\n", source);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
// read and dispatch packets until EOF is reached
|
||
|
|
pcap_loop(fp, 0, dispatcher_handler, NULL);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
void dispatcher_handler(u_char *temp1,
|
||
|
|
const struct pcap_pkthdr *header, const u_char *pkt_data)
|
||
|
|
{
|
||
|
|
u_int i=0;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Unused variable
|
||
|
|
*/
|
||
|
|
(VOID)temp1;
|
||
|
|
|
||
|
|
/* 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");
|
||
|
|
|
||
|
|
}
|