Re: GNUstep - check for reuse address

[Riccardo Mottola]

Hi,

Svante Signell wrote:
Depends on how the test is made. SO_REUSEADDR is defined in bits/socket.h but is
not functional (yet).

I attach the test below. The test is clearly done on AF_INET, so from 
what you tell, it is expected to work.

I know gnustep has a setting to work with local and with inet sockets.

Perhaps the code tries to treat them the same way? I will dig in the code.
Do local sockets work in HURD ? I always switch to inet since years, but 
perhaps this is obsolete now.


Riccardo


/*
  Copyright (C) 2005 Free Software Foundation

  Copying and distribution of this file, with or without modification,
  are permitted in any medium without royalty provided the copyright
  notice and this notice are preserved.
*/
#if defined(__MINGW32__) || defined(__MINGW64__)
#include <windows.h>
#include <winsock2.h>
#else
#include <time.h>
#include <sys/time.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <signal.h>
#endif /* __MINGW__ */

#include <sys/file.h>
#include <sys/stat.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>

#ifndef INADDR_NONE
#define INADDR_NONE     -1
#endif

// Maximum data in single I/O operation
#define NETBUF_SIZE     4096

main()
{
  struct sockaddr_in    sin;
  int   size = sizeof(sin);
  int   status = 1;
  int   port;
  int   net;

  memset(&sin, '\0', sizeof(sin));
  sin.sin_family = AF_INET;
  sin.sin_addr.s_addr = htonl(INADDR_ANY);
  sin.sin_port = 0;

 if ((net = socket(AF_INET, SOCK_STREAM, PF_UNSPEC)) < 0)
    {
      fprintf(stderr, "unable to create socket 1\n");
      return 2;
    }

  setsockopt(net, SOL_SOCKET, SO_REUSEADDR, (char *)&status, 
sizeof(status));

  if (bind(net, (struct sockaddr *)&sin, sizeof(sin)) < 0)
    {
      fprintf(stderr, "unable to bind socket 1\n");
      (void) close(net);
      return 2;
    }

  listen(net, 5);

  if (getsockname(net, (struct sockaddr*)&sin, &size) < 0)
    {
      fprintf(stderr, "unable to get socket 1 name\n");
      (void) close(net);
      return 2;
    }

  port = sin.sin_port;
  memset(&sin, '\0', sizeof(sin));
  sin.sin_family = AF_INET;
  sin.sin_addr.s_addr = htonl(INADDR_ANY);
  sin.sin_port = port;

  if ((net = socket(AF_INET, SOCK_STREAM, PF_UNSPEC)) < 0)
    {
      fprintf(stderr, "unable to create socket 2\n");
      return 2;
    }

  setsockopt(net, SOL_SOCKET, SO_REUSEADDR, (char *)&status, 
sizeof(status));

  /*
   * Now ... this bind should fail unless SO_REUSEADDR is broken.
   */
  if (bind(net, (struct sockaddr *)&sin, sizeof(sin)) < 0)
    {
      return 0;
    }
  return 1;
}