Error LNK2019: unresolved external symbol

[hjazz]

Hi all,
I'm new to VS, and I'm using Visual Studio .NET 2003.

I'm trying to write a program which uses pcap libraries. However, I keep getting the following errors:

error LNK2019: unresolved external symbol __imp__inet_nto a@4 referenced in function _got_packet
error LNK2019: unresolved external symbol __imp__ntohs@4 referenced in function _got_packet
error LNK2019: unresolved external symbol _Search referenced in function _got_packet
error LNK2019: unresolved external symbol _memcpy_s referenced in function _got_packet

The function got_packet is implemented in A.c, and the function Search is implemented in B.c. I also have corresponding header files A.h and B.h.

A.h looks somewhat like this (irrelevant code removed):

#ifndef A_H
#define A_H
 
#include <WinSock2.h>
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <pcap.h>
#include <string.h>
#include <strsafe.h>
 
#include "B.h"
 
void got_packet(u_char *user, const struct pcap_pkthdr *header, const u_char *packet);
 
#endif /* A_H */

B.h looks somewhat like this (irrelevant code removed):

#ifndef B_H
#define B_H
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
__inline int Search( /* Function parameters */ );
 
#endif /* B_H */

Why am I getting these errors and how can I solve them?

Thank you!

Regards,
Rayne

[gpraghuram]

I think you havent included the winsock library in linker options.
Try to include winsock and winsock (libraries) and i think the issue will get resolved.


Raghu

[hjazz]

Thanks. I added ws2_32.lib and took out the __inline from my Search function, and the program ran successfully.