[WinPcap-users] pthreads and winpcap

[eterstegen]

I am really having some troubles with running pthreads and winpcap together.  I am 
pretty rusty on my C so maybe it is just my stupidity, but I keep getting lockups and 
my program will not run.

Basically, what I am trying to do is start a thread that will send out some packets 
once every few seconds.  While this thread is going the main program calls the 
pcap_loop and is listening for certain replies.

Unfortunately, when I put the pthread_create call in the program and run it, it just 
locks up on that call(ran it in gdb).  I comment out that line and the listening part 
runs 
just fine.

I am compiling with cygwin (gcc 3.3.1) on a windows 98 box.  I have tried with both 
the beta winpcap and v3 (both act the same).

I am pasting a stripped down program that demonstrates my problem:

=============== test.c =================

#include <pcap.h>
#include <remote-ext.h> 
#include <pthread.h>

void *test(void *blah)
{
  int done=0;    
  while(!done){
     printf("Who: %s\n", (char *)blah);
     sleep(5);
  }
}

int main(){
    pcap_if_t *alldevs;
    pcap_if_t *d;
    int inum;
    int i=0;
    pcap_t *adhandle;
    char errbuf[PCAP_ERRBUF_SIZE];

    pthread_t t1;
    pthread_create(&t1, NULL,&test,(void *)"numero uno");
    pthread_join(t1,NULL);

    /* Retrieve the device list */
    if (pcap_findalldevs(&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;
    }
    int ptret;
    return 0;

}

=================================

I compile with these:

gcc test.c -mno-cygwin -c -o test.o -I ../../include -DWPCAP
gcc -mno-cygwin -L ../../lib -o test.exe test.o -lwpcap -lpthread

Any ideas?? My brain damage??

Thanks,

Eric Testegen



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