IPSocketAddress.cc

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/*
 * IPSocketAddress.cc
 *
 * Smalltalk like class library for C++
 * Remote station IP address.
 *
 * Copyright (c) 2004 Milan Cermak
 */
/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <stlib/net/IPSocketAddress.h>
#include <stlib/net/UnknownHostError.h>

#include <stlib/Array.h>
#include <stlib/ByteArray.h>
#include <stlib/Character.h>
#include <stlib/Integer.h>
#include <stlib/String.h>
#include <stlib/Stream.h>
#include <stlib/WriteStream.h>

#include <netdb.h>
#include <sys/socket.h>

using namespace Net;

/* Class-accessing protocol */
String *IPSocketAddress::className(void) const
{
    return new String("IPSocketAddress");
}

/* Instance creation protocol */
IPSocketAddress *IPSocketAddress::hostAddress(ByteArray *addr, unsigned short int port)
{
    IPSocketAddress *instance = new IPSocketAddress;
    instance->hostAddress(addr);
    instance->port(port);
    return instance;
}

IPSocketAddress *IPSocketAddress::hostName(String *name, unsigned short int port)
{
    IPSocketAddress *instance = new IPSocketAddress;
    instance->hostName(name);
    instance->port(port);
    return instance;
}

IPSocketAddress *IPSocketAddress::thisHostAnyPort(void)
{
    return hostAddress(thisHost(), anyPort());
}

/* Class-naming utilities protocol */
ByteArray *IPSocketAddress::hostAddressByName(String *name)
{
    struct hostent *ph = NULL;

    ph = gethostbyname(name->asCString());
    if (ph != NULL) return new ByteArray(ph->h_addr, 4);

    ByteArray *address = stringToBytes(name);
    if (address != nil) return address;
    (new UnknownHostError(name, __PRETTY_FUNCTION__))->raise();
}

String *IPSocketAddress::hostNameByAddress(ByteArray *address)
{
    struct hostent *ph = NULL;

    ph = gethostbyaddr(address->rawBytesReadOnly(), address->size(), AF_INET);
    if (ph != NULL) return new String(ph->h_name);
    return bytesToName(address);
}

/* Class-private protocol */
String *IPSocketAddress::bytesToName(ByteArray *address)
{
    return address->printSeparatedBy(".");
}

ByteArray *IPSocketAddress::stringToBytes(String *name)
{
    Array *parts = name->asArrayOfSubstringsSeparatedBy(Character::value('.'));
    if (parts->size() != 4) return nil;
    ByteArray *address = new ByteArray(4);
    for (int i = 0; i < 4; i++) {
        address->put(i, dynamic_cast<String *>(parts->at(i))->asNumber());
    }
    return address;
}

/* Accessing protocol */
ByteArray *IPSocketAddress::hostAddress(void) const
{
    return _address;
}

void IPSocketAddress::hostAddress(ByteArray *addr)
{
    _address = addr;
}

String *IPSocketAddress::hostName(void) const
{
    return hostNameByAddress(hostAddress());
}

void IPSocketAddress::hostName(String *name)
{
    hostAddress(hostAddressByName(name));
}

unsigned short int IPSocketAddress::port(void)
{
    return _port;
}

void IPSocketAddress::port(unsigned short int p)
{
    _port = p;
}

/* Addressing protocol */
ByteArray *IPSocketAddress::thisHost(void)
{
    return new ByteArray("\x00\x00\x00\x00", 4);
}

/* Constants protocol */
unsigned short IPSocketAddress::anyPort(void)
{
    return 0;
}

/* Printing protocol */
void IPSocketAddress::printOn(Stream *stream) const
{
    Object::printOn(stream);
    stream->nextPut('(');
    stream->nextPutAll(hostName());
    stream->nextPutAll(", ");
    stream->print((long) _port);
    stream->nextPut(')');
}

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