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//
// NSFileHandle+SocketConnection.m
// thiSwaY
//
// Created by Sander Niemeijer on Sun Dec 23 2001.
// Copyright 2001-2003 by Uli Kusterer and Sander Niemeijer.
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would be
// appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
/* -----------------------------------------------------------------------------
Headers:
-------------------------------------------------------------------------- */
#import <netdb.h>
#import <netinet/in.h>
#import <sys/socket.h>
#import <unistd.h>
#import <fcntl.h>
#import "NSFileHandle+SocketConnection.h"
@implementation NSFileHandle (UKFileHandleSocketConnection)
/* -----------------------------------------------------------------------------
fileHandleForConnectionToHost:atPort:
Uses Unix socket APIs to create a file descriptor to a socket, and
then generates an NSFileHandle for that file descriptor that can be
used for actual asynchronous data transfer.
-------------------------------------------------------------------------- */
+(id) fileHandleForConnectionToHost: (NSString*)hostname atPort: (unsigned short)port
{
return [self fileHandleForConnectionToHost: hostname atPort: port type: SOCK_STREAM];
}
+(id) fileHandleForDatagramToHost: (NSString*)hostname atPort: (unsigned short)port
{
return [self fileHandleForConnectionToHost: hostname atPort: port type: SOCK_DGRAM];
}
+(id) fileHandleForConnectionToHost: (NSString*)hostname atPort: (unsigned short)port type: (int)typ
{
struct hostent *hostinfo;
struct sockaddr_in remoteAddr;
int fd;
int i;
// Resolve the hostname
hostinfo = gethostbyname( [hostname cString] );
if( hostinfo == NULL )
{
[NSException raise:@"NSFileHandleSocketConnection"
format:@"Could not find host"];
}
// Retrieve a socket
fd = socket( PF_INET, typ, 0 );
if( fd == -1 )
{
[NSException raise:@"NSFileHandleSocketConnection"
format:@"Could not open a socket"];
}
// Try to make a connection to the host by trying all possible addresses
bzero( (char*) &remoteAddr, sizeof(remoteAddr) );
remoteAddr.sin_family = AF_INET;
remoteAddr.sin_port = htons(port);
for( i=0; hostinfo->h_addr_list[i] != NULL; i++ )
{
remoteAddr.sin_addr = *(struct in_addr *)hostinfo->h_addr_list[i];
if( connect(fd,(struct sockaddr *)&remoteAddr,sizeof(remoteAddr)) == 0 )
{
// Connection was succesful:
return [[[NSFileHandle alloc] initWithFileDescriptor:fd closeOnDealloc:YES] autorelease];
}
}
// No connection could be made
[NSException raise:@"NSFileHandleSocketConnection" format:@"Could not connect to host"];
// Should never be reached
return nil;
}
@end