157 lines
3.9 KiB
C
157 lines
3.9 KiB
C
/* blib - Library of useful things to hack the Blinkenlights
|
|
*
|
|
* Copyright (c) 2001-2004 The Blinkenlights Crew
|
|
* Sven Neumann <sven@gimp.org>
|
|
* Daniel Mack <daniel@yoobay.net>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
#include <errno.h>
|
|
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include <glib-object.h>
|
|
|
|
#ifdef G_OS_WIN32
|
|
#include <winsock2.h>
|
|
#else
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
#include <netdb.h>
|
|
#endif
|
|
|
|
#include "bsocket.h"
|
|
|
|
|
|
/**
|
|
* b_socket_init:
|
|
* @error: return location for possible errors.
|
|
*
|
|
* Initialize network sockets. This function does nothing on
|
|
* UNIXes. On Win32 it initializes the Winsock DLL. You may call this
|
|
* function any number of times, the initialization is only done once.
|
|
*
|
|
* Return value: %TRUE on success, %FALSE in case of an error
|
|
**/
|
|
gboolean
|
|
b_socket_init (GError **error)
|
|
{
|
|
#ifdef G_OS_WIN32
|
|
static gboolean winsock_initialized = FALSE;
|
|
|
|
if (! winsock_initialized)
|
|
{
|
|
WORD wVersionRequested;
|
|
WSADATA wsaData;
|
|
|
|
wVersionRequested = MAKEWORD (2, 2);
|
|
|
|
if (WSAStartup (wVersionRequested, &wsaData) == 0)
|
|
{
|
|
winsock_initialized = TRUE;
|
|
}
|
|
else
|
|
{
|
|
g_set_error (error, 0, 0, "Can't initialize the Winsock DLL");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* b_socket_udp_new:
|
|
* @options: #BSocketOptions to set on the socket.
|
|
* @error: return location for possible errors.
|
|
*
|
|
* Creates an UDP socket and configures it according to @options.
|
|
*
|
|
* Return value: a socket descriptor or -1 in case of an error
|
|
**/
|
|
gint
|
|
b_socket_udp_new (BSocketOptions options,
|
|
GError **error)
|
|
{
|
|
gint fd;
|
|
gint value;
|
|
|
|
g_return_val_if_fail (error == NULL || *error == NULL, -1);
|
|
|
|
if (! b_socket_init (error))
|
|
return FALSE;
|
|
|
|
fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
|
|
if (fd == -1)
|
|
{
|
|
g_set_error (error, 0, 0,
|
|
"Can't create socket: %s", g_strerror (errno));
|
|
return -1;
|
|
}
|
|
|
|
if (options & B_SO_BROADCAST)
|
|
{
|
|
value = 1;
|
|
if (setsockopt (fd,
|
|
SOL_SOCKET, SO_BROADCAST, &value, sizeof (value)) < 0)
|
|
{
|
|
g_set_error (error, 0, 0,
|
|
"Can't set socket option (SO_BROADCAST): %s",
|
|
g_strerror (errno));
|
|
close (fd);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (options & B_SO_REUSEADDR)
|
|
{
|
|
value = 1;
|
|
if (setsockopt (fd,
|
|
SOL_SOCKET, SO_REUSEADDR, &value, sizeof (value)) < 0)
|
|
{
|
|
g_set_error (error, 0, 0,
|
|
"Can't set socket option (SO_REUSEADDR): %s",
|
|
g_strerror (errno));
|
|
close (fd);
|
|
return -1;
|
|
}
|
|
|
|
#ifdef SO_REUSEPORT
|
|
value = 1;
|
|
if (setsockopt (fd,
|
|
SOL_SOCKET, SO_REUSEPORT, &value, sizeof (value)) < 0)
|
|
{
|
|
g_set_error (error, 0, 0,
|
|
"Can't set socket option (SO_REUSEPORT): %s",
|
|
g_strerror (errno));
|
|
close (fd);
|
|
return -1;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
return fd;
|
|
}
|