WinPcap

Hey so I have been trying for a fairly long time to get WinPcap to work with visual C++ 2010. I followed the online users manual, linked to the library directory and added the proper includes and header files to their respected destinations. Sadly it still wont compile the following code:

Code:

---


#include <stdlib.h>
#include <stdio.h>
#include <time.h>

#include <pcap/pcap.h>


int main ()
{
pcap_t *fp;
char errbuf[PCAP_ERRBUF_SIZE];
u_char packet[100];
int i;

   
    /* Open the output device */
    if ( (fp= pcap_open(argv[1],            // name of the device
                        100,                // portion of the packet to capture (only the first 100 bytes)
                        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", argv[1]);
        return;
    }

    /* Supposing to be on ethernet, set mac destination to 1:1:1:1:1:1 */
    packet[0]=1;
    packet[1]=1;
    packet[2]=1;
    packet[3]=1;
    packet[4]=1;
    packet[5]=1;
   
    /* set mac source to 2:2:2:2:2:2 */
    packet[6]=2;
    packet[7]=2;
    packet[8]=2;
    packet[9]=2;
    packet[10]=2;
    packet[11]=2;
   
    /* Fill the rest of the packet */
    for(i=12;i<100;i++)
    {
        packet[i]=(u_char)i;
    }

    /* Send down the packet */
    if (pcap_sendpacket(fp, packet, 100 /* size */) != 0)
    {
        printf(stderr,"\nError sending the packet: %s\n", pcap_geterr(fp));
        return;
    }

    return 0;
}

---

This code produces the following error(s).

Code:

---


1>------ Build started: Project: test, Configuration: Debug Win32 ------
1>  main.cpp
1>c:\program files\microsoft visual studio 10.0\vc\include\pcap\pcap.h(47): fatal error C1083: Cannot open include file: 'sys/time.h': No such file or directory
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

---

Now the ideal solution to my problem would be a step by step procedure of how to get a functional WinPcap project. Preferably from someone who has worked with WinPcap and Visual C++ 2010 as I am new to both and am quickly realizing that WinPcap is much trickier to set up then most libraries I have worked with in the past. It seems like this is a common problem and will probably be writing a tutorial on setting these libraries up with different IDE's and compilers as I have yet to find an in depth one of any relevance to the problems I am having.

The error message is pretty clear, VS can't find sys/time.h.
Change the line in pcap.h to the correct path.

First thing I would do is go look at line 47:

Code:

---

#if defined(WIN32)
  #include <pcap-stdinc.h>
#elif defined(MSDOS)
  #include <sys/types.h>
  #include <sys/socket.h>  /* u_int, u_char etc. */
#else /* UN*X */
  #include <sys/types.h>
  #include <sys/time.h> /*line 47*/
#endif /* WIN32/MSDOS/UN*X */

---

So you need to define "WIN32" in project settings (C/C++ -> Preprocessor -> Preprocessor Definitions). Most of the wizard generated projects have this already.

gg

Hey Codeplug that got rid of the time.h error but more popped up. I played around with the code a bit more making it more like the original example and it now looks like this:

Code:

---


#include "stdafx.h"
#include <stdlib.h>
#include <stdio.h>
#include <pcap.h>

int main (int argc, char **argv)
{
pcap_t *fp;
char errbuf[PCAP_ERRBUF_SIZE];
u_char packet[100];
int i;

        /* Check the validity of the command line */
    if (argc != 2)
    {
        printf("usage: %s interface (e.g. 'rpcap://eth0')", argv[0]);
        return;
    }
   
    /* Open the output device */
    if ( (fp= pcap_open(argv[1],            // name of the device
                        100,                // portion of the packet to capture (only the first 100 bytes)
                        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", argv[1]);
        return;
    }

    /* Supposing to be on ethernet, set mac destination to 1:1:1:1:1:1 */
    packet[0]=1;
    packet[1]=1;
    packet[2]=1;
    packet[3]=1;
    packet[4]=1;
    packet[5]=1;
   
    /* set mac source to 2:2:2:2:2:2 */
    packet[6]=2;
    packet[7]=2;
    packet[8]=2;
    packet[9]=2;
    packet[10]=2;
    packet[11]=2;
   
    /* Fill the rest of the packet */
    for(i=12;i<100;i++)
    {
        packet[i]=(u_char)i;
    }

    /* Send down the packet */
    if (pcap_sendpacket(fp, packet, 100 /* size */) != 0)
    {
        fprintf(stderr,"\nError sending the packet: %s\n", pcap_geterr(fp));
        return;
    }

    return 0;
}

---

This code produces the following error(s):

Code:

---


1>------ Build started: Project: test2, Configuration: Debug Win32 ------
1>  test2.cpp
1>c:\documents and settings\hp_administrator\my documents\c++ workspace\socket workspace\test2\test2\test2.cpp(18): error C2561: 'main' : function must return a value
1>          c:\documents and settings\hp_administrator\my documents\c++ workspace\socket workspace\test2\test2\test2.cpp(7) : see declaration of 'main'
1>c:\documents and settings\hp_administrator\my documents\c++ workspace\socket workspace\test2\test2\test2.cpp(24): error C2065: 'PCAP_OPENFLAG_PROMISCUOUS' : undeclared identifier
1>c:\documents and settings\hp_administrator\my documents\c++ workspace\socket workspace\test2\test2\test2.cpp(22): error C3861: 'pcap_open': identifier not found
1>c:\documents and settings\hp_administrator\my documents\c++ workspace\socket workspace\test2\test2\test2.cpp(31): error C2561: 'main' : function must return a value
1>          c:\documents and settings\hp_administrator\my documents\c++ workspace\socket workspace\test2\test2\test2.cpp(7) : see declaration of 'main'
1>c:\documents and settings\hp_administrator\my documents\c++ workspace\socket workspace\test2\test2\test2.cpp(60): error C2561: 'main' : function must return a value
1>          c:\documents and settings\hp_administrator\my documents\c++ workspace\socket workspace\test2\test2\test2.cpp(7) : see declaration of 'main'
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

---

So things that I have done since I last posted, I started a totally new project and this time used one of the wizard created templates for a terminal application. Which ensured that WIN32 was added as a preprocessor definition. Added the appropriate directory entries under VC++ Directories --> Include Directories and Library Directories and added the names of the .lib files as additional dependencies. For some reason it still seems to be having a problem with pcap_open and PCAP_OPENFLAG_PROMISCUOUS.

http://www.winpcap.org/docs/docs_412...pcapsamps.html

Sample source says you need WPCAP and HAVE_REMOTE as well.

gg