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/* sendsocket.c
*
* Copyright (C) 1999-2006 Paul Boersma
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* pb 1999/12/21
* pb 2002/03/07 GPL
* pb 2003/12/19 return NULL if no error
* pb 2004/10/11 re-included windows.h include file (undoes fix of CW5 include-file bug)
* pb 2004/10/11 user-readable error messages
* pb 2006/10/28 erased MacOS 9 stuff
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#if defined (UNIX) || defined (macintosh)
#if defined (macintosh)
/* Prevent some warnings with MacOS X 10.4.2 / CodeWarrior 9.6 / Xcode 2.0 */
#define GATEWAY 0
#define SENDFILE 0
#endif
#include <sys/types.h>
#include <unistd.h>
#include <ctype.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#elif defined (_WIN32)
#include <windows.h>
#include <winsock.h>
#endif
#include "sendsocket.h"
char * sendsocket (const char *hostNameAndPort, const char *command) {
static char result [200];
char hostName [61], *colon;
int port;
if (strlen (hostNameAndPort) > 60)
return "Cannot send to socket because the host-name-and-port string is too long.";
strcpy (hostName, hostNameAndPort);
colon = strchr (hostName, ':');
if (colon == NULL)
return "Cannot send to socket because a colon is missing.\nHost name and port should be in the format \"hostName:port\".";
*colon = '\0';
port = atoi (colon + 1);
{
struct hostent *host;
struct sockaddr_in his_addr; /* Address of remote host. */
int stat, sokket = -1;
long bytesSent;
result [0] = '\0'; /* No error yet. */
#ifdef _WIN32
{
static int initialized;
if (! initialized) {
WSADATA wsaData;
WORD requestedWinsockVersion = MAKEWORD (1,1); /* Require version 1.1. */
if (WSAStartup (requestedWinsockVersion, & wsaData)) {
return "Cannot send to socket because the socket library (WINSOCK.DLL) is not available, "
"too old, or otherwise unusable.";
}
initialized = 1;
}
}
#endif
if (isdigit (hostName [0])) {
if ((his_addr. sin_addr.s_addr = inet_addr ((char *) hostName)) == 0xFFFFFFFF) {
sprintf (result, "Cannot send to socket because the hostname \"%s\" is invalid.", hostName);
return result;
}
his_addr. sin_family = AF_INET;
} else if ((host = gethostbyname (hostName)) != NULL) {
his_addr. sin_family = host -> h_addrtype;
memcpy (& his_addr. sin_addr, host -> h_addr, host -> h_length);
} else {
sprintf (result, "Cannot send to socket because the host \"%s\" is unknown.", hostName);
return result;
}
his_addr. sin_port = htons (port);
sokket = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sokket < 0) {
strcpy (result, "Cannot send to socket because the socket cannot be created.");
goto end;
}
stat = connect (sokket, (struct sockaddr *) & his_addr, sizeof (struct sockaddr_in));
if (stat != 0) {
strcpy (result, "Cannot send to socket because the connection cannot be made.");
goto end;
}
/*
Melder_casual ("Connected to port %d on host %s.", ntohs (his_addr. sin_port), inet_ntoa (his_addr. sin_addr));
*/
bytesSent = send (sokket, command, strlen (command) + 1, 0); /* Include null byte. */
if (bytesSent < 0) {
strcpy (result, "Data not sent to socket.");
goto end;
}
/*
Melder_casual ("sendsocket: %d bytes written.", bytesSent);
*/
end:
if (sokket >= 0) {
#if defined (UNIX) || defined (macintosh)
close (sokket);
#elif defined (_WIN32)
closesocket (sokket);
#endif
}
}
return result [0] == '\0' ? NULL: result;
}
/* End of file sendsocket.c */
|
