code blocks windows pcap basic program
Code:
#include <winsock.h>
#include <stdio.h>
#include <stdlib.h>
#include <pcap.h> /* GIMME a libpcap plz! */
#include <errno.h>
int main(int argc, char **argv)
{
char *dev; /* name of the device to use */
char *net; /* dot notation of the network address */
char *mask;/* dot notation of the network mask */
int ret; /* return code */
char errbuf[PCAP_ERRBUF_SIZE];
bpf_u_int32 netp; /* ip */
bpf_u_int32 maskp;/* subnet mask */
struct in_addr addr;
/* ask pcap to find a valid device for use to sniff on */
dev = pcap_lookupdev(errbuf);
/* error checking */
if(dev == NULL)
{
printf("%s\n",errbuf);
exit(1);
}
/* print out device name */
printf("DEV: %s\n",dev);
/* ask pcap for the network address and mask of the device */
ret = pcap_lookupnet(dev,&netp,&maskp,errbuf);
if(ret == -1)
{
printf("%s\n",errbuf);
exit(1);
}
/* get the network address in a human readable form */
addr.s_addr = netp;
net = inet_ntoa(addr);
if(net == NULL)/* thanks Scott :-P */
{
perror("inet_ntoa");
exit(1);
}
printf("NET: %s\n",net);
/* do the same as above for the device's mask */
addr.s_addr = maskp;
mask = inet_ntoa(addr);
if(mask == NULL)
{
perror("inet_ntoa");
exit(1);
}
printf("MASK: %s\n",mask);
return 0;
}
gives the errors:
Code:
obj\Debug\main.o||In function `main':|
D:\tcp\tcp test\main.c|31|undefined reference to `pcap_lookupdev'|
D:\tcp\tcp test\main.c|44|undefined reference to `pcap_lookupnet'|
D:\tcp\tcp test\main.c|54|undefined reference to `inet_ntoa@4'|
D:\tcp\tcp test\main.c|66|undefined reference to `inet_ntoa@4'|
||=== Build finished: 4 errors, 0 warnings ===|
ive added all the library paths to code block compiler and linker directories evident by the fact that i dont get error while linking pcap.h.
please help, thank you.
