I'm experimenting with WinPcap 4.1.1 libraries for Windows, but I can't manage to compile even example source provided with the library.
I'm getting these errors:
'PCAP_OPENFLAG_PROMISCUOUS' undeclared (first use in this function)
'PCAP_SRC_IF_STRING' undeclared (first use in this function)
And bunch of warnings:
implicit declaration of function 'localtime_s'
implicit declaration of function 'pcap_findalldevs_ex'
implicit declaration of function 'pcap_open'
implicit declaration of function 'scanf_s'
I Googled up a bit and found that I should add a line #define HAVE_REMOTE
(I have no clue what does it do) but it leads in much more errors like this:
undefined reference to 'pcap_open'
undefined reference to 'pcap_findalldevs_ex'
undefined reference to 'localtime_s'
The "pcap.h"
seems to be included properly (eclipse does not report any including errors).
I have copied the *.lib files into MinGW/lib direcotry and set this path in the Path and Symbols->Library Paths
(eclipse project properties)
I have no idea what to try next. Any ideas are welcome. Thanks in advance
Here's the code:
#include "pcap.h"
/* prototype of the packet handler */
void packet_handler(u_char *param, const struct pcap_pkthdr *header,
const u_char *pkt_data);
int main()
{
pcap_if_t *alldevs;
pcap_if_t *d;
int inum;
int i=0;
pcap_t *adhandle;
char errbuf[PCAP_ERRBUF_SIZE];
/* Retrieve the device list on the local machine */
if (pcap_findalldevs_ex(PCAP_SRC_IF_STRING, NULL, &alldevs, errbuf) == -1)
{
fprintf(stderr,"Error in pcap_findalldevs: %s\n", errbuf);
exit(1);
}
/* Print the list */
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_s("%d", &inum);
if(inum < 1 || 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; i< inum-1 ;d=d->next, i++);
/* Open the device */
if ( (adhandle= pcap_open(d->name, // 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 adapter. %s is not supported by
WinPcap\n", d->name);
/* Free the device list */
pcap_freealldevs(alldevs);
return -1;
}
printf("\nlistening on %s...\n", d->description);
/* At this point, we don't need any more the device list. Free it */
pcap_freealldevs(alldevs);
/* start the capture */
pcap_loop(adhandle, 0, packet_handler, NULL);
return 0;
}
/* Callback function invoked by libpcap for every incoming packet */
void packet_handler(u_char *param, const struct pcap_pkthdr *header,
const u_char *pkt_data)
{
struct tm ltime;
char timestr[16];
time_t local_tv_sec;
/*
* unused variables
*/
(VOID)(param);
(VOID)(pkt_data);
/* convert the timestamp to readable format */
local_tv_sec = header->ts.tv_sec;
localtime_s(<ime, &local_tv_sec);
strftime( timestr, sizeof timestr, "%H:%M:%S", <ime);
printf("%s,%.6d len:%d\n", timestr, header->ts.tv_usec, header->len);
}