jni/commoncpp2-1.8.1-android/src/socket.cpp

// Copyright (C) 1999-2005 Open Source Telecom Corporation.
// Copyright (C) 2009 Leandro Melo de Sales <leandroal@gmail.com>
// Copyright (C) 2006-2010 David Sugar, Tycho Softworks,
//
// 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.
//
// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
//
// This exception applies only to the code released under the name GNU
// Common C++.  If you copy code from other releases into a copy of GNU
// Common C++, as the General Public License permits, the exception does
// not apply to the code that you add in this way.  To avoid misleading
// anyone as to the status of such modified files, you must delete
// this exception notice from them.
//
// If you write modifications of your own for GNU Common C++, it is your choice
// whether to permit this exception to apply to your modifications.
// If you do not wish that, delete this exception notice.
//

#include <cc++/config.h>
#include <cc++/export.h>
#include <cc++/exception.h>
#include <cc++/thread.h>
#include <cc++/address.h>
#include <cc++/socket.h>
#include "private.h"
#include "nat.h"
#include <fcntl.h>
#include <cerrno>
#include <cstdlib>
#include <cstdarg>
#include <cstdio>

#ifndef WIN32
#include <netinet/tcp.h>
#endif

#ifdef  WIN32
#include <io.h>
#define socket_errno    WSAGetLastError()
#endif

#ifndef WIN32
#include <sys/ioctl.h>
#ifdef HAVE_NET_IP6_H
#include <netinet/ip6.h>
#endif

#if defined(__hpux) && defined(_XOPEN_SOURCE_EXTENDED)
#undef  _XOPEN_SOURCE_EXTENDED
#endif

#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif

#if defined(__hpux)
#define _XOPEN_SOURCE_EXTENDED
#endif

#ifdef  HAVE_NET_IF_H
#include <net/if.h>
#endif
#endif

#ifndef WIN32
#define socket_errno errno
# ifndef  O_NONBLOCK
#  define O_NONBLOCK    O_NDELAY
# endif
# ifdef IPPROTO_IP
#  ifndef  SOL_IP
#   define SOL_IP   IPPROTO_IP
#  endif // !SOL_IP
# endif  // IPPROTO_IP
#endif   // !WIN32

#ifndef INADDR_LOOPBACK
#define INADDR_LOOPBACK (unsigned long)0x7f000001
#endif

#ifdef  CCXX_NAMESPACES
namespace ost {
using namespace std;
#endif

#if defined(WIN32) && !defined(__MINGW32__)
static SOCKET dupSocket(SOCKET so,enum Socket::State state)
{
    if (state == Socket::STREAM)
        return dup((int)so);

    HANDLE pidHandle = GetCurrentProcess();
    HANDLE dupHandle;
    if(DuplicateHandle(pidHandle, reinterpret_cast<HANDLE>(so), pidHandle, &dupHandle, 0, FALSE, DUPLICATE_SAME_ACCESS))
        return reinterpret_cast<SOCKET>(dupHandle);
    return INVALID_SOCKET;
}
# define DUP_SOCK(s,state) dupSocket(s,state)
#else
# define DUP_SOCK(s,state) dup(s)
#endif

Mutex Socket::mutex;

bool Socket::check(Family fam)
{
    SOCKET so = INVALID_SOCKET;

    switch(fam) {
    case IPV4:
        so = socket(fam, SOCK_DGRAM, IPPROTO_UDP);
        break;
#ifdef  CCXX_IPV6
    case IPV6:
        so = socket(fam, SOCK_DGRAM, IPPROTO_UDP);
        break;
#endif
    default:
        return false;
    }

    if(so == INVALID_SOCKET)
        return false;

#ifdef  WIN32
    closesocket(so);
#else
    close(so);
#endif
    return true;
}

Socket::Socket()
{
    setSocket();
}

Socket::Socket(int domain, int type, int protocol)
{
    setSocket();
    so = socket(domain, type, protocol);
    if(so == INVALID_SOCKET) {
        error(errCreateFailed,(char *)"Could not create socket",socket_errno);
        return;
    }
#ifdef  SO_NOSIGPIPE
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_NOSIGPIPE, (char *)&opt, sizeof(opt));
#endif
    state = AVAILABLE;
}

Socket::Socket(SOCKET fd)
{
    setSocket();
    if (fd == INVALID_SOCKET) {
        error(errCreateFailed,(char *)"Invalid socket handle passed",0);
        return;
    }
    so = fd;
    state = AVAILABLE;
}

Socket::Socket(const Socket &orig)
{
    setSocket();
    so = DUP_SOCK(orig.so,orig.state);
    if(so == INVALID_SOCKET)
        error(errCopyFailed,(char *)"Could not duplicate socket handle",socket_errno);
    state = orig.state;
}

Socket::~Socket()
{
    endSocket();
}

void Socket::setSocket(void)
{
    flags.thrown    = false;
    flags.broadcast = false;
    flags.route     = true;
    flags.keepalive = false;
    flags.loopback  = true;
    flags.multicast = false;
    flags.linger    = false;
    flags.ttl   = 1;
    errid           = errSuccess;
    errstr          = NULL;
    syserr          = 0;
    state           = INITIAL;
    so              = INVALID_SOCKET;
}

Socket::Error Socket::sendLimit(int limit)
{
#ifdef  SO_SNDLOWAT
    if(setsockopt(so, SOL_SOCKET, SO_SNDLOWAT, (char *)&limit, sizeof(limit)))
        return errInvalidValue;

    return errSuccess;

#else
    return errServiceUnavailable;
#endif
}

Socket::Error Socket::receiveLimit(int limit)
{
#ifdef  SO_RCVLOWAT
    if(setsockopt(so, SOL_SOCKET, SO_RCVLOWAT, (char *)&limit, sizeof(limit)))
        return errInvalidValue;

    return errSuccess;

#else
    return errServiceUnavailable;
#endif
}

Socket::Error Socket::sendTimeout(timeout_t to)
{
#ifdef  SO_SNDTIMEO
    struct timeval tv;

    tv.tv_sec = to / 1000;
    tv.tv_usec = (to % 1000) * 1000;

    if(setsockopt(so, SOL_SOCKET, SO_SNDTIMEO, (char *)&tv, sizeof(tv)))
        return errInvalidValue;

    return errSuccess;

#else
    return errServiceUnavailable;
#endif
}

Socket::Error Socket::receiveTimeout(timeout_t to)
{
#ifdef  SO_RCVTIMEO
    struct timeval tv;

    tv.tv_sec = to / 1000;
    tv.tv_usec = (to % 1000) * 1000;

    if(setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, (char *)&tv, sizeof(tv)))
        return errInvalidValue;

    return errSuccess;
#else
    return errServiceUnavailable;
#endif
}

Socket::Error Socket::sendBuffer(unsigned bufsize)
{
#ifdef  SO_SNDBUF
    if(setsockopt(so, SOL_SOCKET, SO_SNDBUF, (char *)&bufsize, sizeof(bufsize)))
        return errInvalidValue;
    return errSuccess;
#else
    return errServiceUnavailable;
#endif
}

Socket::Error Socket::bufferSize(unsigned bufsize)
{
    Error err = receiveBuffer(bufsize);
    if(err == errSuccess)
        err = sendBuffer(bufsize);

    return err;
}

Socket::Error Socket::receiveBuffer(unsigned bufsize)
{
#ifdef  SO_RCVBUF
    if(setsockopt(so, SOL_SOCKET, SO_RCVBUF, (char *)&bufsize, sizeof(bufsize)))
        return errInvalidValue;
    return errSuccess;
#else
    return errServiceUnavailable;
#endif
}

ssize_t Socket::readLine(char *str, size_t request, timeout_t timeout)
{
    bool crlf = false;
    bool nl = false;
    size_t nleft = request - 1; // leave also space for terminator
    int nstat,c;

    if(request < 1)
        return 0;

    str[0] = 0;

    while(nleft && !nl) {
        if(timeout) {
            if(!isPending(pendingInput, timeout)) {
                error(errTimeout,(char *)"Read timeout", 0);
                return -1;
            }
        }
        nstat = ::recv(so, str, _IOLEN64 nleft, MSG_PEEK);
        if(nstat <= 0) {
            error(errInput,(char *)"Could not read from socket", socket_errno);
            return -1;
        }

        // FIXME: if unique char in buffer is '\r' return "\r"
        //        if buffer end in \r try to read another char?
        //        and if timeout ??
        //        remember last \r

        for(c=0; c < nstat; ++c) {
            if(str[c] == '\n') {
                if (c > 0 && str[c-1] == '\r')
                    crlf = true;
                ++c;
                nl = true;
                break;
            }
        }
        nstat = ::recv(so, str, _IOLEN64 c, 0);
        // TODO: correct ???
        if(nstat < 0)
            break;

        // adjust ending \r\n in \n
        if(crlf) {
            --nstat;
            str[nstat - 1] = '\n';
        }

        str += nstat;
        nleft -= nstat;
    }
    *str = 0;
    return (ssize_t)(request - nleft - 1);
}

ssize_t Socket::readData(void *Target, size_t Size, char Separator, timeout_t timeout)
{
    if ((Separator == 0x0D) || (Separator == 0x0A))
        return (readLine ((char *) Target, Size, timeout));

    if (Size < 1)
        return (0);

    ssize_t nstat;

    if (Separator == 0) {       // Flat-out read for a number of bytes.
        if (timeout) {
            if (!isPending (pendingInput, timeout)) {
                error(errTimeout);
                return (-1);
            }
        }
        nstat =::recv (so, (char *)Target, _IOLEN64 Size, 0);

        if (nstat < 0) {
            error (errInput);
            return (-1);
        }
        return (nstat);
    }
    /////////////////////////////////////////////////////////////
    // Otherwise, we have a special char separator to use
    /////////////////////////////////////////////////////////////
    bool found = false;
    size_t nleft = Size;
    int c;
    char *str = (char *) Target;

    memset (str, 0, Size);

    while (nleft && !found) {
        if (timeout) {
            if (!isPending (pendingInput, timeout)) {
                error(errTimeout);
                return (-1);
            }
        }
        nstat =::recv (so, str, _IOLEN64 nleft, MSG_PEEK);
        if (nstat <= 0) {
            error (errInput);
            return (-1);
        }

        for (c = 0; (c < nstat) && !found; ++c) {
            if (str[c] == Separator)
                found = true;
        }

        memset (str, 0, nleft);
        nstat =::recv (so, str, c, 0);
        if (nstat < 0)
            break;

        str += nstat;
        nleft -= nstat;
    }
    return (ssize_t)(Size - (ssize_t) nleft);
}

ssize_t Socket::writeData(const void *Source, size_t Size, timeout_t timeout)
{
    if (Size < 1)
        return (0);

    ssize_t nstat;
    const char *Slide = (const char *) Source;

    while (true) {
        if (timeout) {
            if (!isPending (pendingOutput, timeout)) {
                error(errOutput);
                return (-1);
            }
        }
        nstat =::send (so, Slide, _IOLEN64 Size, MSG_NOSIGNAL);

        if (nstat <= 0) {
            error(errOutput);
            return (-1);
        }
        Size -= nstat;
        Slide += nstat;


        if (Size <= 0)
            break;
    }
    return (nstat);
}

bool Socket::isConnected(void) const
{
    return (Socket::state == CONNECTED) ? true : false;
}

bool Socket::isActive(void) const
{
    return (state != INITIAL) ? true : false;
}

bool Socket::operator!() const
{
    return (Socket::state == INITIAL) ? true : false;
}

void Socket::endSocket(void)
{
    if(Socket::state == STREAM) {
        state = INITIAL;
#ifdef  WIN32
        if(so != (UINT)-1) {
            SOCKET sosave = so;
            so = INVALID_SOCKET;
            closesocket((int)sosave);
        }
#else
        if(so > -1) {
            SOCKET sosave = so;
            so = INVALID_SOCKET;
            close(sosave);
        }
#endif
        return;
    }

    state = INITIAL;
    if(so == INVALID_SOCKET)
        return;

#ifdef  SO_LINGER
    struct linger linger;

    if(flags.linger) {
        linger.l_onoff = 1;
        linger.l_linger = 60;
    }
    else
        linger.l_onoff = linger.l_linger = 0;
    setsockopt(so, SOL_SOCKET, SO_LINGER, (char *)&linger,
        (socklen_t)sizeof(linger));
#endif
//  shutdown(so, 2);
#ifdef WIN32
    closesocket(so);
#else
    close(so);
#endif
    so = INVALID_SOCKET;
}

#ifdef WIN32
Socket::Error Socket::connectError(void)
{
    char* str = "Could not connect to remote host";
    switch(WSAGetLastError()) {
    case WSAENETDOWN:
        return error(errResourceFailure,str,socket_errno);
    case WSAEINPROGRESS:
        return error(errConnectBusy,str,socket_errno);
    case WSAEADDRNOTAVAIL:
        return error(errConnectInvalid,str,socket_errno);
    case WSAECONNREFUSED:
        return error(errConnectRefused,str,socket_errno);
    case WSAENETUNREACH:
        return error(errConnectNoRoute,str,socket_errno);
    default:
        return error(errConnectFailed,str,socket_errno);
    }
}
#else
Socket::Error Socket::connectError(void)
{
    char* str = (char *)"Could not connect to remote host";
    switch(errno) {
#ifdef  EHOSTUNREACH
    case EHOSTUNREACH:
        return error(errConnectNoRoute,str,socket_errno);
#endif
#ifdef  ENETUNREACH
    case ENETUNREACH:
        return error(errConnectNoRoute,str,socket_errno);
#endif
    case EINPROGRESS:
        return error(errConnectBusy,str,socket_errno);
#ifdef  EADDRNOTAVAIL
    case EADDRNOTAVAIL:
        return error(errConnectInvalid,str,socket_errno);
#endif
    case ECONNREFUSED:
        return error(errConnectRefused,str,socket_errno);
    case ETIMEDOUT:
        return error(errConnectTimeout,str,socket_errno);
    default:
        return error(errConnectFailed,str,socket_errno);
    }
}
#endif

Socket::Error Socket::error(Error err, const char *errs, long systemError) const
{
    errid  = err;
    errstr = errs;
    syserr = systemError;
    if(!err)
        return err;

    if(flags.thrown)
        return err;

    // prevents recursive throws

    flags.thrown = true;
#ifdef  CCXX_EXCEPTIONS
    switch(Thread::getException()) {
    case Thread::throwObject:
        THROW((Socket *)this);
#ifdef  COMMON_STD_EXCEPTION
    case Thread::throwException:
        {
            if(!errs)
                errs = (char *)"";
            THROW(SockException(String(errs), err, systemError));
        }
#endif
    case Thread::throwNothing:
        break;
    }
#endif
    return err;
}

const char *Socket::getSystemErrorString(void) const
{
#ifdef  CCXX_EXCEPTIONS
    SockException e(errstr, errid, syserr);
    return e.getSystemErrorString();
#else
    return NULL;
#endif
}

Socket::Error Socket::setBroadcast(bool enable)
{
    int opt = (enable ? 1 : 0);
    if(setsockopt(so, SOL_SOCKET, SO_BROADCAST,
              (char *)&opt, (socklen_t)sizeof(opt)))
        return error(errBroadcastDenied,(char *)"Could not set socket broadcast option",socket_errno);
    flags.broadcast = enable;
    return errSuccess;
}

Socket::Error Socket::setKeepAlive(bool enable)
{
    int opt = (enable ? ~0: 0);
#if (defined(SO_KEEPALIVE) || defined(WIN32))
    if(setsockopt(so, SOL_SOCKET, SO_KEEPALIVE,
              (char *)&opt, (socklen_t)sizeof(opt)))
        return error(errKeepaliveDenied,(char *)"Could not set socket keep-alive option",socket_errno);
#endif
    flags.keepalive = enable;
    return errSuccess;
}

Socket::Error Socket::setLinger(bool linger)
{
#ifdef  SO_LINGER
    flags.linger = linger;
    return errSuccess;
#else
    return error(errServiceUnavailable,(char *)"Socket lingering not supported");
#endif
}

Socket::Error Socket::setRouting(bool enable)
{
    int opt = (enable ? 1 : 0);

#ifdef  SO_DONTROUTE
    if(setsockopt(so, SOL_SOCKET, SO_DONTROUTE,
              (char *)&opt, (socklen_t)sizeof(opt)))
        return error(errRoutingDenied,(char *)"Could not set dont-route socket option",socket_errno);
#endif
    flags.route = enable;
    return errSuccess;
}

Socket::Error Socket::setNoDelay(bool enable)
{
    int opt = (enable ? 1 : 0);

    if(setsockopt(so, IPPROTO_TCP, TCP_NODELAY,
              (char *)&opt, (socklen_t)sizeof(opt)))
        return error(errNoDelay,(char *)"Could not set tcp-nodelay socket option",socket_errno);


    return errSuccess;
}

Socket::Error Socket::setTypeOfService(Tos service)
{
#ifdef  SOL_IP
    unsigned char tos;
    switch(service) {
#ifdef  IPTOS_LOWDELAY
    case tosLowDelay:
        tos = IPTOS_LOWDELAY;
        break;
#endif
#ifdef  IPTOS_THROUGHPUT
    case tosThroughput:
        tos = IPTOS_THROUGHPUT;
        break;
#endif
#ifdef  IPTOS_RELIABILITY
    case tosReliability:
        tos = IPTOS_RELIABILITY;
        break;
#endif
#ifdef  IPTOS_MINCOST
    case tosMinCost:
        tos = IPTOS_MINCOST;
        break;
#endif
    default:
        return error(errServiceUnavailable,(char *)"Unknown type-of-service");
    }
    if(setsockopt(so, SOL_IP, IP_TOS,(char *)&tos, (socklen_t)sizeof(tos)))
        return error(errServiceDenied,(char *)"Could not set type-of-service",socket_errno);
    return errSuccess;
#else
    return error(errServiceUnavailable,(char *)"Socket type-of-service not supported",socket_errno);
#endif
}

Socket::Error Socket::setTimeToLiveByFamily(unsigned char ttl, Family fam)
{
    if(!flags.multicast)
        return error(errMulticastDisabled,(char *)"Multicast not enabled on socket");

    switch(fam) {
#ifdef  CCXX_IPV6
    case IPV6:
        flags.ttl = ttl;
        setsockopt(so, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, (char *)&ttl, sizeof(ttl));
        return errSuccess;
#endif
    case IPV4:
#ifdef  IP_MULTICAST_TTL
        flags.ttl = ttl;
        setsockopt(so, IPPROTO_IP, IP_MULTICAST_TTL, (char *)&ttl, sizeof(ttl));
        return errSuccess;
#endif
    default:
        return error(errServiceUnavailable, (char *)"Multicast not supported");
    }
}

Socket::Error Socket::setLoopbackByFamily(bool enable, Family family)
{
    unsigned char loop;

    if(!flags.multicast)
        return error(errMulticastDisabled,(char *)"Multicast not enabled on socket");

    if(enable)
        loop = 1;
    else
        loop = 0;
    flags.loopback = enable;

    switch(family) {
#ifdef  CCXX_IPV6
    case IPV6:
        setsockopt(so, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, (char *)&loop, sizeof(loop));
        return errSuccess;
#endif
    case IPV4:
#ifdef  IP_MULTICAST_LOOP
        setsockopt(so, IPPROTO_IP, IP_MULTICAST_LOOP, (char *)&loop, sizeof(loop));
        return errSuccess;
#endif
    default:
        return error(errServiceUnavailable,(char *)"Multicast not supported");
    }
}

bool Socket::isPending(Pending pending, timeout_t timeout)
{
    int status;
#ifdef USE_POLL
    struct pollfd pfd;

    pfd.fd = so;
    pfd.revents = 0;

    if(so == INVALID_SOCKET)
        return true;

    switch(pending) {
    case pendingInput:
        pfd.events = POLLIN;
        break;
    case pendingOutput:
        pfd.events = POLLOUT;
        break;
    case pendingError:
        pfd.events = POLLERR | POLLHUP;
        break;
    }

    status = 0;
    while(status < 1) {

        if(timeout == TIMEOUT_INF)
            status = poll(&pfd, 1, -1);
        else
            status = poll(&pfd, 1, timeout);

        if(status < 1) {
            // don't stop polling because of a simple
            // signal :)
            if(status == -1 && errno == EINTR)
                continue;

            return false;
        }
    }

    if(pfd.revents & pfd.events)
        return true;
    return false;
#else
    struct timeval tv;
    struct timeval *tvp = &tv;
    fd_set grp;

    if(timeout == TIMEOUT_INF)
        tvp = NULL;
    else {
        tv.tv_usec = (timeout % 1000) * 1000;
        tv.tv_sec = timeout / 1000;
    }

    FD_ZERO(&grp);
    SOCKET sosave = so;
    if(so == INVALID_SOCKET)
        return true;
    FD_SET(sosave, &grp);
#ifdef  WIN32
    Thread::Cancel cancel = Thread::enterCancel();
#endif
    switch(pending) {
    case pendingInput:
        status = select((int)so + 1, &grp, NULL, NULL, tvp);
        break;
    case pendingOutput:
        status = select((int)so + 1, NULL, &grp, NULL, tvp);
        break;
    case pendingError:
        status = select((int)so + 1, NULL, NULL, &grp, tvp);
        break;
    }
#ifdef  WIN32
    Thread::exitCancel(cancel);
#endif
    if(status < 1)
        return false;
    if(FD_ISSET(so, &grp))
        return true;
    return false;
#endif
}

Socket &Socket::operator=(const Socket &from)
{
    if(so == from.so)
        return *this;

    if(state != INITIAL)
        endSocket();

    so = DUP_SOCK(from.so,from.state);
    if(so == INVALID_SOCKET) {
        error(errCopyFailed,(char *)"Could not duplicate socket handle",socket_errno);
        state = INITIAL;
    }
    else
        state = from.state;

    return *this;
}

void Socket::setCompletion(bool immediate)
{
    flags.completion = immediate;
#ifdef WIN32
    unsigned long flag;
    // note that this will not work on some versions of Windows for Workgroups. Tough. -- jfc
    switch( immediate ) {
    case false:
        // this will not work if you are using WSAAsyncSelect or WSAEventSelect.
        // -- perhaps I should throw an exception
        flag = 1;
//      ioctlsocket( so, FIONBIO, (unsigned long *) 1);
        break;
    case true:
        flag = 0;
//      ioctlsocket( so, FIONBIO, (unsigned long *) 0);
        break;
    }
    ioctlsocket(so, FIONBIO, &flag);
#else
    int fflags = fcntl(so, F_GETFL);

    switch( immediate ) {
    case false:
        fflags |= O_NONBLOCK;
        fcntl(so, F_SETFL, fflags);
        break;
    case true:
        fflags &=~ O_NONBLOCK;
        fcntl(so, F_SETFL, fflags);
        break;
    }
#endif
}

IPV4Host Socket::getIPV4Sender(tpport_t *port) const
{
    struct sockaddr_in from;
    char buf;
    socklen_t len = sizeof(from);
    int rc = ::recvfrom(so, &buf, 1, MSG_PEEK,
                (struct sockaddr *)&from, &len);

#ifdef WIN32
    if(rc < 1 && WSAGetLastError() != WSAEMSGSIZE) {
        if(port)
            *port = 0;

        memset((void*) &from, 0, sizeof(from));
        error(errInput,(char *)"Could not read from socket",socket_errno);
    }
#else
    if(rc < 0) {
        if(port)
            *port = 0;

        memset((void*) &from, 0, sizeof(from));
        error(errInput,(char *)"Could not read from socket",socket_errno);
    }
#endif
    else {
        if(rc < 1)
            memset((void*) &from, 0, sizeof(from));

        if(port)
            *port = ntohs(from.sin_port);
    }

    return IPV4Host(from.sin_addr);
}

#ifdef  CCXX_IPV6
IPV6Host Socket::getIPV6Sender(tpport_t *port) const
{
    struct sockaddr_in6 from;
    char buf;
    socklen_t len = sizeof(from);
    int rc = ::recvfrom(so, &buf, 1, MSG_PEEK,
                (struct sockaddr *)&from, &len);

#ifdef WIN32
    if(rc < 1 && WSAGetLastError() != WSAEMSGSIZE) {
        if(port)
            *port = 0;

        memset((void*) &from, 0, sizeof(from));
        error(errInput,(char *)"Could not read from socket",socket_errno);
    }
#else
    if(rc < 0) {
        if(port)
            *port = 0;

        memset((void*) &from, 0, sizeof(from));
        error(errInput,(char *)"Could not read from socket",socket_errno);
    }
#endif
    else {
        if(rc < 1)
            memset((void*) &from, 0, sizeof(from));

        if(port)
            *port = ntohs(from.sin6_port);
    }

    return IPV6Host(from.sin6_addr);
}
#endif

IPV4Host Socket::getIPV4Local(tpport_t *port) const
{
    struct sockaddr_in addr;
    socklen_t len = sizeof(addr);

    if(getsockname(so, (struct sockaddr *)&addr, &len)) {
        error(errResourceFailure,(char *)"Could not get socket address",socket_errno);
            if(port)
            *port = 0;
        memset(&addr.sin_addr, 0, sizeof(addr.sin_addr));
    }
    else {
        if(port)
                *port = ntohs(addr.sin_port);
    }
    return IPV4Host(addr.sin_addr);
}

#ifdef  CCXX_IPV6
IPV6Host Socket::getIPV6Local(tpport_t *port) const
{
    struct sockaddr_in6 addr;
    socklen_t len = sizeof(addr);

    if(getsockname(so, (struct sockaddr *)&addr, &len)) {
        error(errResourceFailure,(char *)"Could not get socket address",socket_errno);
            if(port)
            *port = 0;
        memset(&addr.sin6_addr, 0, sizeof(addr.sin6_addr));
    }
    else {
        if(port)
                *port = ntohs(addr.sin6_port);
    }
    return IPV6Host(addr.sin6_addr);
}

#endif

IPV4Host Socket::getIPV4NAT(tpport_t *port) const
{
    struct sockaddr_in addr;
    natResult res;

    if((res=natv4Lookup((int)so, &addr))!=natOK) {
        if(res==natNotSupported)
            error( errServiceUnavailable, natErrorString( res ) );
        else if(res==natSearchErr)
            error( errSearchErr, natErrorString( res ) );
        else
            error( errLookupFail, natErrorString( res ), socket_errno );
        if(port)
            *port = 0;
        memset(&addr.sin_addr, 0, sizeof(addr.sin_addr));
    }
    else {
        if(port)
                *port = ntohs(addr.sin_port);
    }
    return IPV4Host(addr.sin_addr);
}

#ifdef  CCXX_IPV6
IPV6Host Socket::getIPV6NAT(tpport_t *port) const
{
    struct sockaddr_in6 addr;
    natResult res;

    if((res=natv6Lookup(so, &addr))!=natOK) {
        if(res==natNotSupported)
            error( errServiceUnavailable, natErrorString( res ) );
        else if(res==natSearchErr)
            error( errSearchErr, natErrorString( res ) );
        else
            error( errLookupFail, natErrorString( res ), socket_errno );
        if(port)
            *port = 0;
        memset(&addr.sin6_addr, 0, sizeof(addr.sin6_addr));
    }
    else {
        if(port)
                *port = ntohs(addr.sin6_port);
    }
    return IPV6Host(addr.sin6_addr);
}
#endif

IPV4Host Socket::getIPV4Peer(tpport_t *port) const
{
    struct sockaddr_in addr;
    socklen_t len = sizeof(addr);

    if(getpeername(so, (struct sockaddr *)&addr, &len)) {
#ifndef WIN32
        if(errno == ENOTCONN)
            error(errNotConnected,(char *)"Could not get peer address",socket_errno);
        else
#endif
            error(errResourceFailure,(char *)"Could not get peer address",socket_errno);
        if(port)
            *port = 0;
        memset(&addr.sin_addr, 0, sizeof(addr.sin_addr));
    }
    else {
        if(port)
                *port = ntohs(addr.sin_port);
    }
    return IPV4Host(addr.sin_addr);
}

#ifdef  CCXX_IPV6
IPV6Host Socket::getIPV6Peer(tpport_t *port) const
{
    struct sockaddr_in6 addr;
    socklen_t len = sizeof(addr);

    if(getpeername(so, (struct sockaddr *)&addr, &len)) {
#ifndef WIN32
        if(errno == ENOTCONN)
            error(errNotConnected,(char *)"Could not get peer address",socket_errno);
        else
#endif
            error(errResourceFailure,(char *)"Could not get peer address",socket_errno);
        if(port)
            *port = 0;
        memset(&addr.sin6_addr, 0, sizeof(addr.sin6_addr));
    }
    else {
        if(port)
                *port = ntohs(addr.sin6_port);
    }
    return IPV6Host(addr.sin6_addr);
}
#endif

Socket::Error Socket::setMulticastByFamily(bool enable, Family family)
{
    socklen_t len;

    switch(family) {
#ifdef  CCXX_IPV6
    case IPV6:
        struct sockaddr_in6 addr;
        len = sizeof(addr);

        if(enable == flags.multicast)
            return errSuccess;

        flags.multicast = enable;
        if(enable)
            getsockname(so, (struct sockaddr *)&addr, &len);
        else
            memset(&addr.sin6_addr, 0, sizeof(addr.sin6_addr));

        setsockopt(so, IPPROTO_IPV6, IPV6_MULTICAST_IF, (char *)&addr.sin6_addr, sizeof(addr.sin6_addr));
        return errSuccess;
#endif
    case IPV4:
#ifdef  IP_MULTICAST_IF
        struct sockaddr_in addr4;
        len = sizeof(addr4);

        if(enable == flags.multicast)
            return errSuccess;

        flags.multicast = enable;
        if(enable)
            getsockname(so, (struct sockaddr *)&addr4, &len);
        else
            memset(&addr4.sin_addr, 0, sizeof(addr4.sin_addr));

        setsockopt(so, IPPROTO_IP, IP_MULTICAST_IF, (char *)&addr4.sin_addr, sizeof(addr4.sin_addr));
        return errSuccess;
#endif
    default:
        return error(errServiceUnavailable,(char *)"Multicast not supported");
    }
}

Socket::Error Socket::join(const IPV4Multicast &ia)
{
#ifdef  IP_ADD_MEMBERSHIP
    struct ip_mreq group;
    struct sockaddr_in myaddr;
    socklen_t len = sizeof(myaddr);

    if(!flags.multicast)
        return error(errMulticastDisabled,(char *)"Multicast not enabled on socket");

    getsockname(so, (struct sockaddr *)&myaddr, &len);
    group.imr_interface.s_addr = INADDR_ANY;
    group.imr_multiaddr = getaddress(ia);
    setsockopt(so, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&group, sizeof(group));
    return errSuccess;
#else
    return error(errServiceUnavailable,(char *)"Multicast not supported");
#endif
}

#ifdef  CCXX_IPV6
Socket::Error Socket::join(const IPV6Multicast &ia)
{
#ifdef  IPV6_ADD_MEMBERSHIP
    struct ipv6_mreq group;
    struct sockaddr_in6 myaddr;
    socklen_t len = sizeof(myaddr);

    if(!flags.multicast)
        return error(errMulticastDisabled,(char *)"Multicast not enabled on socket");

    getsockname(so, (struct sockaddr *)&myaddr, &len);
    group.ipv6mr_interface = 0;
    group.ipv6mr_multiaddr = getaddress(ia);
    setsockopt(so, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, (char *)&group, sizeof(group));
    return errSuccess;
#else
    return error(errServiceUnavailable,(char *)"Multicast not supported");
#endif
}

#endif

Socket::Error Socket::drop(const IPV4Multicast &ia)
{
#ifdef  IP_DROP_MEMBERSHIP
    struct ip_mreq group;
    struct sockaddr_in myaddr;
    socklen_t len = sizeof(myaddr);

    if(!flags.multicast)
        return error(errMulticastDisabled,(char *)"Multicast not enabled on socket");

    getsockname(so, (struct sockaddr *)&myaddr, &len);
    group.imr_interface.s_addr = INADDR_ANY;
    group.imr_multiaddr = getaddress(ia);
    setsockopt(so, IPPROTO_IP, IP_DROP_MEMBERSHIP, (char *)&group, sizeof(group));
    return errSuccess;
#else
    return error(errServiceUnavailable,(char *)"Multicast not supported");
#endif
}

#ifdef  CCXX_IPV6
Socket::Error Socket::drop(const IPV6Multicast &ia)
{
#ifdef  IPV6_DROP_MEMBERSHIP
    struct ipv6_mreq group;
    struct sockaddr_in6 myaddr;
    socklen_t len = sizeof(myaddr);

    if(!flags.multicast)
        return error(errMulticastDisabled,(char *)"Multicast not enabled on socket");

    getsockname(so, (struct sockaddr *)&myaddr, &len);
    group.ipv6mr_interface = 0;
    group.ipv6mr_multiaddr = getaddress(ia);
    setsockopt(so, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, (char *)&group, sizeof(group));
    return errSuccess;
#else
    return error(errServiceUnavailable,(char *)"Multicast not supported");
#endif
}
#endif

#ifdef  HAVE_GETADDRINFO

UDPSocket::UDPSocket(const char *name, Family fam) :
Socket(fam, SOCK_DGRAM, IPPROTO_UDP)
{
    char namebuf[128], *cp;
    struct addrinfo hint, *list = NULL, *first;

    family = fam;

    switch(fam) {
#ifdef  CCXX_IPV6
    case IPV6:
        peer.ipv6.sin6_family = family;
        break;
#endif
    case IPV4:
        peer.ipv4.sin_family = family;
    }

    snprintf(namebuf, sizeof(namebuf), "%s", name);
    cp = strrchr(namebuf, '/');
    if(!cp && family == IPV4)
        cp = strrchr(namebuf, ':');

    if(!cp) {
        cp = namebuf;
        name = NULL;
    }
    else {
        name = namebuf;
        *(cp++) = 0;
        if(!strcmp(name, "*"))
            name = NULL;
    }

    memset(&hint, 0, sizeof(hint));

    hint.ai_family = family;
    hint.ai_socktype = SOCK_DGRAM;
    hint.ai_protocol = IPPROTO_UDP;
    hint.ai_flags = AI_PASSIVE;

    if(getaddrinfo(name, cp, &hint, &list) || !list) {
        error(errBindingFailed, (char *)"Could not find service", errno);
        endSocket();
        return;
    }

#if defined(SO_REUSEADDR)
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_REUSEADDR, (char *)&opt,
        (socklen_t)sizeof(opt));
#endif

    first = list;

    while(list) {
        if(!bind(so, list->ai_addr, (socklen_t)list->ai_addrlen)) {
            state = BOUND;
            break;
        }
        list = list->ai_next;
    }
    freeaddrinfo(first);

    if(state != BOUND) {
        endSocket();
        error(errBindingFailed, (char *)"Count not bind socket", errno);
        return;
    }
}

#else

UDPSocket::UDPSocket(const char *name, Family fam) :
Socket(fam, SOCK_DGRAM, IPPROTO_UDP)
{
    char namebuf[128], *cp;
    tpport_t port;
    struct servent *svc;
    socklen_t alen;
    struct sockaddr *addr;

    family = fam;

    snprintf(namebuf, sizeof(namebuf), "%s", name);
    cp = strrchr(namebuf, '/');
    if(!cp && family == IPV4)
        cp = strrchr(namebuf, ':');

    if(!cp) {
        cp = namebuf;
        name = "*";
    }
    else {
        name = namebuf;
        *(cp++) = 0;
    }

    if(isdigit(*cp))
        port = atoi(cp);
    else {
        mutex.enter();
        svc = getservbyname(cp, "udp");
        if(svc)
            port = ntohs(svc->s_port);
        mutex.leave();
        if(!svc) {
            error(errBindingFailed, (char *)"Could not find service", errno);
            endSocket();
            return;
        }
    }

    struct sockaddr_in addr4;
    IPV4Address ia4(name);
#ifdef  CCXX_IPV6
    struct sockaddr_in6 addr6;
    IPV6Address ia6(name);
#endif

    switch(family) {
#ifdef  CCXX_IPV6
    case IPV6:
        peer.ipv6.sin6_family = family;
        memset(&addr6, 0, sizeof(addr6));
        addr6.sin6_family = family;
        addr6.sin6_addr = getaddress(ia6);
        addr6.sin6_port = htons(port);
        alen = sizeof(addr6);
        addr = (struct sockaddr *)&addr6;
        break;
#endif
    case IPV4:
        peer.ipv4.sin_family = family;
        memset(&addr4, 0, sizeof(addr4));
        addr4.sin_family = family;
        addr4.sin_addr = getaddress(ia4);
        addr4.sin_port = htons(port);
        alen = sizeof(&addr4);
        addr = (struct sockaddr *)&addr4;
    }

#if defined(SO_REUSEADDR)
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_REUSEADDR, (char *)&opt,
        (socklen_t)sizeof(opt));
#endif

    if(!bind(so, addr, alen))
        state = BOUND;

    if(state != BOUND) {
        endSocket();
        error(errBindingFailed, (char *)"Count not bind socket", errno);
        return;
    }
}

#endif

UDPSocket::UDPSocket(Family fam) :
Socket(fam, SOCK_DGRAM, IPPROTO_UDP)
{
    family = fam;
    memset(&peer, 0, sizeof(peer));
    switch(fam) {
#ifdef  CCXX_IPV6
    case IPV6:
        peer.ipv6.sin6_family = family;
        break;
#endif
    case IPV4:
        peer.ipv4.sin_family = family;
    }
}

UDPSocket::UDPSocket(const IPV4Address &ia, tpport_t port) :
Socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)
{
    family = IPV4;
    memset(&peer.ipv4, 0, sizeof(peer));
    peer.ipv4.sin_family = AF_INET;
    peer.ipv4.sin_addr = getaddress(ia);
    peer.ipv4.sin_port = htons(port);
#if defined(SO_REUSEADDR)
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_REUSEADDR, (char *)&opt, (socklen_t)sizeof(opt));
#endif
    if(bind(so, (struct sockaddr *)&peer.ipv4, sizeof(peer.ipv4))) {
        endSocket();
        error(errBindingFailed,(char *)"Could not bind socket",socket_errno);
        return;
    }
    state = BOUND;
}

#ifdef  CCXX_IPV6
UDPSocket::UDPSocket(const IPV6Address &ia, tpport_t port) :
Socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP)
{
    family = IPV6;
    memset(&peer.ipv6, 0, sizeof(peer));
    peer.ipv6.sin6_family = AF_INET6;
    peer.ipv6.sin6_addr = getaddress(ia);
    peer.ipv6.sin6_port = htons(port);
#if defined(SO_REUSEADDR)
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_REUSEADDR, (char *)&opt, (socklen_t)sizeof(opt));
#endif
    if(bind(so, (struct sockaddr *)&peer.ipv6, sizeof(peer.ipv6))) {
        endSocket();
        error(errBindingFailed,(char *)"Could not bind socket",socket_errno);
        return;
    }
    state = BOUND;
}
#endif

UDPSocket::~UDPSocket()
{
    endSocket();
}

ssize_t UDPSocket::send(const void *buf, size_t len)
{
    struct sockaddr *addr = NULL;
    socklen_t alen = 0;

    switch(family) {
#ifdef  CCXX_IPV6
    case IPV6:
        addr = (struct sockaddr *)&peer.ipv6;
        alen = sizeof(struct sockaddr_in6);
        break;
#endif
    case IPV4:
        addr = (struct sockaddr *)&peer.ipv4;
        alen = sizeof(struct sockaddr_in);
        break;
    default:
        return -1;
    }

    if(isConnected()) {
        addr = NULL;
        alen = 0;
    }

    return _IORET64 ::sendto(so, (const char *)buf, _IOLEN64 len, MSG_NOSIGNAL, addr, alen);
}

ssize_t UDPSocket::receive(void *buf, size_t len, bool reply)
{
    struct sockaddr *addr = NULL;
    struct sockaddr_in senderAddress;  // DMC 2/7/05 ADD for use below.
    socklen_t alen = 0;

    switch(family) {
#ifdef  CCXX_IPV6
    case IPV6:
        addr = (struct sockaddr *)&peer.ipv6;
        alen = sizeof(struct sockaddr_in6);
        break;
#endif
    case IPV4:
        addr = (struct sockaddr *)&peer.ipv4;
        alen = sizeof(struct sockaddr_in);
        break;
    default:
        return -1;
    }

    if(isConnected() || !reply) {
        // DMC 2/7/05 MOD to use senderAddress instead of NULL, to prevent 10014 error
        // from recvfrom.
        //addr = NULL;
        //alen = 0;
        addr = (struct sockaddr*)(&senderAddress);
        alen = sizeof(struct sockaddr_in);
    }

    int bytes = ::recvfrom(so, (char *)buf, _IOLEN64 len, 0, addr, &alen);

#ifdef  WIN32
    int code = 0;

    if (bytes == SOCKET_ERROR) {
        code = WSAGetLastError();
    }
#endif

    return _IORET64 bytes;
}

Socket::Error UDPSocket::join(const IPV4Multicast &ia,int InterfaceIndex)
{

#if defined(WIN32) && defined(IP_ADD_MEMBERSHIP)

        // DMC 2/7/05: Added WIN32 block.  Win32 does not define the ip_mreqn structure,
        // so we must use ip_mreq with INADDR_ANY.
        struct ip_mreq      group;
    struct sockaddr_in   myaddr;
    socklen_t            len = sizeof(myaddr);

    if(!flags.multicast)
      return error(errMulticastDisabled);

    memset(&group, 0, sizeof(group));
    getsockname(so, (struct sockaddr *)&myaddr, &len);
    group.imr_multiaddr.s_addr = ia.getAddress().s_addr;
    group.imr_interface.s_addr = INADDR_ANY;
    int retval = setsockopt(so, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&group, sizeof(group));
    return errSuccess;

#elif defined(IP_ADD_MEMBERSHIP) && defined(SIOCGIFINDEX) && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && !defined(_OSF_SOURCE) && !defined(__hpux) && !defined(__GNU__)

        struct ip_mreqn      group;
    struct sockaddr_in   myaddr;
    socklen_t            len = sizeof(myaddr);

    if(!flags.multicast)
      return error(errMulticastDisabled);

    getsockname(so, (struct sockaddr *)&myaddr, &len);
    memset(&group, 0, sizeof(group));
    memcpy(&group.imr_address, &myaddr.sin_addr, sizeof(&myaddr.sin_addr));
    group.imr_multiaddr = getaddress(ia);
    group.imr_ifindex   = InterfaceIndex;
    setsockopt(so, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&group, sizeof(group));
    return errSuccess;
#elif defined(IP_ADD_MEMBERSHIP)
    // if no by index, use INADDR_ANY
    struct ip_mreq group;
    struct sockaddr_in myaddr;
    socklen_t len = sizeof(myaddr);

    if(!flags.multicast)
        return error(errMulticastDisabled);

    getsockname(so, (struct sockaddr *)&myaddr, &len);
    memset(&group, sizeof(group), 0);
    group.imr_multiaddr.s_addr = ia.getAddress().s_addr;
    group.imr_interface.s_addr = INADDR_ANY;
    setsockopt(so, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&group, sizeof(group));
    return errSuccess;
#else
    return error(errServiceUnavailable);
#endif
}


Socket::Error UDPSocket::getInterfaceIndex(const char *DeviceName,int& InterfaceIndex)
{
#ifndef WIN32
#if defined(IP_ADD_MEMBERSHIP) && defined(SIOCGIFINDEX) && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && !defined(_OSF_SOURCE) && !defined(__hpux) && !defined(__GNU__)

    struct ip_mreqn  mreqn;
    struct ifreq       m_ifreq;
    int            i;
    sockaddr_in*          in4 = (sockaddr_in*) &peer.ipv4;
    InterfaceIndex = -1;

    memset(&mreqn, 0, sizeof(mreqn));
    memcpy(&mreqn.imr_multiaddr.s_addr, &in4->sin_addr, sizeof(mreqn.imr_multiaddr.s_addr));

    for (i = 0; i < IFNAMSIZ && DeviceName[i]; ++i)
        m_ifreq.ifr_name[i] = DeviceName[i];
    for (; i < IFNAMSIZ; ++i)
        m_ifreq.ifr_name[i] = 0;

    if (ioctl (so, SIOCGIFINDEX, &m_ifreq))
        return error(errServiceUnavailable);

#if defined(__FreeBSD__) || defined(__GNU__)
    InterfaceIndex = m_ifreq.ifr_ifru.ifru_index;
#else
    InterfaceIndex = m_ifreq.ifr_ifindex;
#endif
    return errSuccess;
#else
    return error(errServiceUnavailable);
#endif
#else
    return error(errServiceUnavailable);
#endif // WIN32
}

#ifdef  AF_UNSPEC
Socket::Error UDPSocket::disconnect(void)
{
    struct sockaddr_in addr;
    int len = sizeof(addr);

    if(so == INVALID_SOCKET)
        return errSuccess;

    Socket::state = BOUND;

    memset(&addr, 0, len);
#ifndef WIN32
    addr.sin_family = AF_UNSPEC;
#else
    addr.sin_family = AF_INET;
    memset(&addr.sin_addr, 0, sizeof(addr.sin_addr));
#endif
    if(::connect(so, (sockaddr *)&addr, len))
        return connectError();
    return errSuccess;
}
#else
Socket::Error UDPSocket::disconnect(void)
{
    if(so == INVALID_SOCKET)
        return errSuccess;

    Socket::state = BOUND;
    return connect(getLocal());
}
#endif

void UDPSocket::setPeer(const IPV4Host &ia, tpport_t port)
{
    memset(&peer.ipv4, 0, sizeof(peer.ipv4));
    peer.ipv4.sin_family = AF_INET;
    peer.ipv4.sin_addr = getaddress(ia);
    peer.ipv4.sin_port = htons(port);
}

void UDPSocket::connect(const IPV4Host &ia, tpport_t port)
{
    setPeer(ia, port);
    if(so == INVALID_SOCKET)
        return;

    if(!::connect(so, (struct sockaddr *)&peer.ipv4, sizeof(struct sockaddr_in)))
        Socket::state = CONNECTED;
}

#ifdef  CCXX_IPV6
void UDPSocket::setPeer(const IPV6Host &ia, tpport_t port)
{
    memset(&peer.ipv6, 0, sizeof(peer.ipv6));
    peer.ipv6.sin6_family = AF_INET6;
    peer.ipv6.sin6_addr = getaddress(ia);
    peer.ipv6.sin6_port = htons(port);
}

void UDPSocket::connect(const IPV6Host &ia, tpport_t port)
{
    setPeer(ia, port);

    if(so == INVALID_SOCKET)
        return;

    if(!::connect(so, (struct sockaddr *)&peer.ipv6, sizeof(struct sockaddr_in6)))
        Socket::state = CONNECTED;

}

#endif

#ifdef  HAVE_GETADDRINFO

void UDPSocket::setPeer(const char *name)
{
    char namebuf[128], *cp;
    struct addrinfo hint, *list;

    snprintf(namebuf, sizeof(namebuf), "%s", name);
    cp = strrchr(namebuf, '/');
    if(!cp)
        cp = strrchr(namebuf, ':');

    if(!cp)
        return;

    memset(&hint, 0, sizeof(hint));
    hint.ai_family = family;
    hint.ai_socktype = SOCK_DGRAM;
    hint.ai_protocol = IPPROTO_UDP;

    if(getaddrinfo(namebuf, cp, &hint, &list) || !list)
        return;

    switch(family) {
#ifdef  CCXX_IPV6
    case IPV6:
        memcpy(&peer.ipv6, list->ai_addr, sizeof(peer.ipv6));
        break;
#endif
    case IPV4:
        memcpy(&peer.ipv4, list->ai_addr, sizeof(peer.ipv4));
        break;
    }

    freeaddrinfo(list);
}

#else

void UDPSocket::setPeer(const char *name)
{
    char namebuf[128], *cp;
    struct servent *svc;
    tpport_t port;

    snprintf(namebuf, sizeof(namebuf), "%s", name);
    cp = strrchr(namebuf, '/');
    if(!cp)
        cp = strrchr(namebuf, ':');

    if(!cp)
        return;

    if(isdigit(*cp))
        port = atoi(cp);
    else {
        mutex.enter();
        svc = getservbyname(cp, "udp");
        if(svc)
            port = ntohs(svc->s_port);
        mutex.leave();
        if(!svc)
            return;
    }

    memset(&peer, 0, sizeof(peer));

    switch(family) {
#ifdef  CCXX_IPV6
    case IPV6:
        setPeer(IPV6Host(namebuf), port);
        break;
#endif
    case IPV4:
        setPeer(IPV4Host(namebuf), port);
        break;
    }
}

#endif

void UDPSocket::connect(const char *service)
{
    int rtn = -1;

    setPeer(service);

    if(so == INVALID_SOCKET)
        return;

    switch(family) {
#ifdef  CCXX_IPV6
    case IPV6:
        rtn = ::connect(so, (struct sockaddr *)&peer.ipv6, sizeof(struct sockaddr_in6));
        break;
#endif
    case IPV4:
        rtn = ::connect(so, (struct sockaddr *)&peer.ipv4, sizeof(struct sockaddr_in));
        break;
    }
    if(!rtn)
        Socket::state = CONNECTED;
}

IPV4Host UDPSocket::getIPV4Peer(tpport_t *port) const
{
    // FIXME: insufficient buffer
    //        how to retrieve peer ??
    char buf;
    socklen_t len = sizeof(peer.ipv4);
    int rtn = ::recvfrom(so, &buf, 1, MSG_PEEK, (struct sockaddr *)&peer.ipv4, &len);

#ifdef WIN32
    if(rtn < 1 && WSAGetLastError() != WSAEMSGSIZE) {
        if(port)
            *port = 0;

        memset((void*) &peer.ipv4, 0, sizeof(peer.ipv4));
    }
#else
    if(rtn < 1) {
        if(port)
            *port = 0;

        memset((void*) &peer.ipv4, 0, sizeof(peer.ipv4));
    }
#endif
    else {
        if(port)
            *port = ntohs(peer.ipv4.sin_port);
    }
    return IPV4Host(peer.ipv4.sin_addr);
}

#ifdef  CCXX_IPV6
IPV6Host UDPSocket::getIPV6Peer(tpport_t *port) const
{
    // FIXME: insufficient buffer
    //        how to retrieve peer ??
    char buf;
    socklen_t len = sizeof(peer.ipv6);
    int rtn = ::recvfrom(so, &buf, 1, MSG_PEEK, (struct sockaddr *)&peer.ipv6, &len);

#ifdef WIN32
    if(rtn < 1 && WSAGetLastError() != WSAEMSGSIZE) {
        if(port)
            *port = 0;

        memset((void*) &peer.ipv6, 0, sizeof(peer.ipv6));
    }
#else
    if(rtn < 1) {
        if(port)
            *port = 0;

        memset((void*) &peer.ipv6, 0, sizeof(peer.ipv6));
    }
#endif
    else {
        if(port)
            *port = ntohs(peer.ipv6.sin6_port);
    }
    return IPV6Host(peer.ipv6.sin6_addr);
}
#endif

UDPBroadcast::UDPBroadcast(const IPV4Address &ia, tpport_t port) :
UDPSocket(ia, port)
{
    if(so != INVALID_SOCKET)
        setBroadcast(true);
}

void UDPBroadcast::setPeer(const IPV4Broadcast &ia, tpport_t port)
{
    memset(&peer.ipv4, 0, sizeof(peer.ipv4));
    peer.ipv4.sin_family = AF_INET;
    peer.ipv4.sin_addr = getaddress(ia);
    peer.ipv4.sin_port = htons(port);
}

void TCPSocket::setSegmentSize(unsigned mss)
{
#ifdef  TCP_MAXSEG
    if(mss > 1)
        setsockopt(so, IPPROTO_TCP, TCP_MAXSEG, (char *)&mss, sizeof(mss));
#endif
    segsize = mss;
}

#ifdef  HAVE_GETADDRINFO
TCPSocket::TCPSocket(const char *name, unsigned backlog, unsigned mss) :
Socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)
{
    char namebuf[128], *cp;
    struct addrinfo hint, *list = NULL, *first;
    snprintf(namebuf, sizeof(namebuf), "%s", name);
    cp = strrchr(namebuf, '/');
    if(!cp)
        cp = strrchr(namebuf, ':');

    if(!cp) {
        cp = namebuf;
        name = NULL;
    }
    else {
        name = namebuf;
        *(cp++) = 0;
        if(!strcmp(name, "*"))
            name = NULL;
    }

    memset(&hint, 0, sizeof(hint));
    hint.ai_family = AF_INET;
    hint.ai_socktype = SOCK_STREAM;
    hint.ai_protocol = IPPROTO_TCP;
    hint.ai_flags = AI_PASSIVE;

    if(getaddrinfo(name, cp, &hint, &list) || !list) {
        endSocket();
        error(errBindingFailed, (char *)"Could not find service", errno);
        return;
    }

#if defined(SO_REUSEADDR)
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_REUSEADDR, (char *)&opt,
        (socklen_t)sizeof(opt));
#endif

    first = list;
    while(list) {
        if(!bind(so, list->ai_addr, (socklen_t)list->ai_addrlen)) {
            state = BOUND;
            break;
        }
        list = list->ai_next;
    }
    freeaddrinfo(first);
    if(state != BOUND) {
        endSocket();
        error(errBindingFailed,(char *)"Could not bind socket",socket_errno);
        return;
    }

    setSegmentSize(mss);
    if(listen(so, backlog)) {
        endSocket();
        error(errBindingFailed,(char *)"Could not listen on socket",socket_errno);
        return;
    }
}

#else
TCPSocket::TCPSocket(const char *name, unsigned backlog, unsigned mss) :
Socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)
{
    char namebuf[128], *cp;
    struct sockaddr_in addr;
    struct servent *svc;

    memset(&addr, 0, sizeof(addr));
    snprintf(namebuf, sizeof(namebuf), "%s", name);
    cp = strrchr(namebuf, '/');
    if(!cp)
        cp = strrchr(namebuf, ':');

    if(!cp) {
        cp = namebuf;
        name = "*";
    }
    else {
        name = namebuf;
        *(cp++) = 0;
    }

    addr.sin_family = AF_INET;
    if(isdigit(*cp))
        addr.sin_port = htons(atoi(cp));
    else {
        mutex.enter();
        svc = getservbyname(cp, "tcp");
        if(svc)
            addr.sin_port = svc->s_port;
        mutex.leave();
        if(!svc) {
                    endSocket();
                    error(errBindingFailed, "Could not find service", errno);
                    return;

        }
    }

    IPV4Address ia(name);
    addr.sin_addr = getaddress(ia);

#if defined(SO_REUSEADDR)
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_REUSEADDR, (char *)&opt,
        (socklen_t)sizeof(opt));
#endif

    if(bind(so, (struct sockaddr *)&addr, sizeof(addr))) {
        endSocket();
        error(errBindingFailed,(char *)"Could not bind socket",socket_errno);
        return;
    }

    setSegmentSize(mss);
    if(listen(so, backlog)) {
        endSocket();
        error(errBindingFailed,(char *)"Could not listen on socket",
            socket_errno);
        return;
    }
    state = BOUND;
}

#endif

TCPSocket::TCPSocket(const IPV4Address &ia, tpport_t port, unsigned backlog, unsigned mss) :
Socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)
{
    struct sockaddr_in addr;

    memset(&addr, 0, sizeof(addr));
    addr.sin_family = AF_INET;
    addr.sin_addr = getaddress(ia);
    addr.sin_port = htons(port);

#if defined(SO_REUSEADDR)
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_REUSEADDR, (char *)&opt, (socklen_t)sizeof(opt));
#endif
    if(bind(so, (struct sockaddr *)&addr, sizeof(addr))) {
        endSocket();
        error(errBindingFailed,(char *)"Could not bind socket",socket_errno);
        return;
    }

    setSegmentSize(mss);

    if(listen(so, backlog)) {
        endSocket();
        error(errBindingFailed,(char *)"Could not listen on socket",socket_errno);
        return;
    }
    state = BOUND;
}

bool TCPSocket::onAccept(const IPV4Host &ia, tpport_t port)
{
    return true;
}

TCPSocket::~TCPSocket()
{
    endSocket();
}

#ifdef  CCXX_IPV6

void TCPV6Socket::setSegmentSize(unsigned mss)
{
#ifdef  TCP_MAXSEG
    if(mss > 1)
        setsockopt(so, IPPROTO_TCP, TCP_MAXSEG, (char *)&mss, sizeof(mss));
#endif
    segsize = mss;
}


#ifdef  HAVE_GETADDRINFO
TCPV6Socket::TCPV6Socket(const char *name, unsigned backlog, unsigned mss) :
Socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP)
{
    char namebuf[128], *cp;
    struct addrinfo hint, *list = NULL, *first;

    snprintf(namebuf, sizeof(namebuf), "%s", name);
    cp = strrchr(namebuf, '/');

    if(!cp) {
        cp = namebuf;
        name = NULL;
    }
    else {
        name = namebuf;
        *(cp++) = 0;
        if(!strcmp(name, "*"))
            name = NULL;
    }

    memset(&hint, 0, sizeof(hint));
    hint.ai_family = AF_INET6;
    hint.ai_socktype = SOCK_STREAM;
    hint.ai_protocol = IPPROTO_TCP;
    hint.ai_flags = AI_PASSIVE;

    if(getaddrinfo(name, cp, &hint, &list) || !list) {
        endSocket();
        error(errBindingFailed, (char *)"Could not find service", errno);
        return;
    }

#if defined(SO_REUSEADDR)
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_REUSEADDR, (char *)&opt,
        (socklen_t)sizeof(opt));
#endif

    first = list;
    while(list) {
        if(!bind(so, list->ai_addr, (socklen_t)list->ai_addrlen)) {
            state = BOUND;
            break;
        }
        list = list->ai_next;
    }
    freeaddrinfo(first);
    if(state != BOUND) {
        endSocket();
        error(errBindingFailed,(char *)"Could not bind socket",socket_errno);
        return;
    }

    setSegmentSize(mss);

    if(listen(so, backlog)) {
        endSocket();
        error(errBindingFailed,(char *)"Could not listen on socket",socket_errno);
        return;
    }
}

#else
TCPV6Socket::TCPV6Socket(const char *name, unsigned backlog, unsigned mss) :
Socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP)
{
    char namebuf[128], *cp;
    struct sockaddr_in6 addr;
    struct servent *svc;

    memset(&addr, 0, sizeof(addr));
    snprintf(namebuf, sizeof(namebuf), "%s", name);
    cp = strrchr(namebuf, '/');

    if(!cp) {
        cp = namebuf;
        name = "*";
    }
    else {
        name = namebuf;
        *(cp++) = 0;
    }

    addr.sin6_family = AF_INET6;
    if(isdigit(*cp))
        addr.sin6_port = htons(atoi(cp));
    else {
        mutex.enter();
        svc = getservbyname(cp, "tcp");
        if(svc)
            addr.sin6_port = svc->s_port;
        mutex.leave();
        if(!svc) {
                    endSocket();
                    error(errBindingFailed, "Could not find service", errno);
                    return;

        }
    }

    IPV6Address ia(name);
    addr.sin6_addr = getaddress(ia);

#if defined(SO_REUSEADDR)
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_REUSEADDR, (char *)&opt,
        (socklen_t)sizeof(opt));
#endif

    if(bind(so, (struct sockaddr *)&addr, sizeof(addr))) {
        endSocket();
        error(errBindingFailed,(char *)"Could not bind socket",socket_errno);
        return;
    }

    setSegmentSize(mss);

    if(listen(so, backlog)) {
        endSocket();
        error(errBindingFailed,(char *)"Could not listen on socket",
            socket_errno);
        return;
    }
    state = BOUND;
}

#endif

TCPV6Socket::TCPV6Socket(const IPV6Address &ia, tpport_t port, unsigned backlog, unsigned mss) :
Socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP)
{
    struct sockaddr_in6 addr;

    memset(&addr, 0, sizeof(addr));
    addr.sin6_family = AF_INET6;
    addr.sin6_addr = getaddress(ia);
    addr.sin6_port = htons(port);

#if defined(SO_REUSEADDR)
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_REUSEADDR, (char *)&opt, (socklen_t)sizeof(opt));
#endif
    if(bind(so, (struct sockaddr *)&addr, sizeof(addr))) {
        endSocket();
        error(errBindingFailed,(char *)"Could not bind socket",socket_errno);
        return;
    }

    setSegmentSize(mss);

    if(listen(so, backlog)) {
        endSocket();
        error(errBindingFailed,(char *)"Could not listen on socket",socket_errno);
        return;
    }
    state = BOUND;
}

bool TCPV6Socket::onAccept(const IPV6Host &ia, tpport_t port)
{
    return true;
}

TCPV6Socket::~TCPV6Socket()
{
    endSocket();
}

#endif

void TCPSocket::reject(void)
{
    SOCKET rej = accept(so, NULL, NULL);
    shutdown(rej, 2);
#ifdef WIN32
    closesocket(rej);
#else
    close(rej);
#endif
}

#ifdef  CCXX_IPV6
void TCPV6Socket::reject(void)
{
    SOCKET rej = accept(so, NULL, NULL);
    shutdown(rej, 2);
#ifdef WIN32
    closesocket(rej);
#else
    close(rej);
#endif
}
#endif

DCCPSocket::DCCPSocket(Family fam) :
Socket(fam, SOCK_DCCP, IPPROTO_DCCP)
{
    family = fam;
}

DCCPSocket::DCCPSocket(DCCPSocket& server, timeout_t timeout) :
Socket(accept(server.so, NULL, NULL))
{
    family = server.family;
    Socket::state = CONNECTED;
    socklen_t alen = sizeof(peer);

    getpeername(so, (struct sockaddr *)&peer, &alen);

    switch(family) {
#ifdef  CCXX_IPV6
    case IPV6:
        if(!server.onAccept(IPV6Host(peer.ipv6.sin6_addr), peer.ipv6.sin6_port))
            endSocket();
        break;
#endif
    case IPV4:
        if(!server.onAccept(IPV4Host(peer.ipv4.sin_addr), peer.ipv4.sin_port))
            endSocket();
        break;
    }
}

#ifdef  HAVE_GETADDRINFO
DCCPSocket::DCCPSocket(const char *name, Family fam, unsigned backlog) :
Socket(fam, SOCK_DCCP, IPPROTO_DCCP)
{
    char namebuf[128], *cp;
    struct addrinfo hint, *list = NULL, *first;
    snprintf(namebuf, sizeof(namebuf), "%s", name);
    cp = strrchr(namebuf, '/');
    if(!cp)
        cp = strrchr(namebuf, ':');

    if(!cp) {
        cp = namebuf;
        name = NULL;
    }
    else {
        name = namebuf;
        *(cp++) = 0;
        if(!strcmp(name, "*"))
            name = NULL;
    }

    family = fam;
    memset(&hint, 0, sizeof(hint));
    hint.ai_family = family;
    hint.ai_socktype = SOCK_DCCP;
    hint.ai_protocol = IPPROTO_DCCP;
    hint.ai_flags = AI_PASSIVE;

    if(getaddrinfo(name, cp, &hint, &list) || !list) {
        endSocket();
        error(errBindingFailed, (char *)"Could not find service", errno);
        return;
    }

#if defined(SO_REUSEADDR)
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_REUSEADDR, (char *)&opt,
            (socklen_t)sizeof(opt));
#endif

    first = list;
    while(list) {
        if(!bind(so, list->ai_addr, (socklen_t)list->ai_addrlen)) {
            state = BOUND;
            break;
        }
        list = list->ai_next;
    }
    freeaddrinfo(first);
    if(state != BOUND) {
        endSocket();
        error(errBindingFailed,(char *)"Could not bind socket",socket_errno);
        return;
    }

    if(listen(so, backlog)) {
        endSocket();
        error(errBindingFailed,(char *)"Could not listen on socket",socket_errno);
        return;
    }
}
#else
DCCPSocket::DCCPSocket(const char *name, Family fam, unsigned backlog) :
Socket(fam, SOCK_DCCP, IPPROTO_DCCP)
{
    char namebuf[128], *cp;
    struct sockaddr_in addr;
#ifdef  CCXX_IPV6
    struct sockaddr_in6 addr6;
#endif
    struct sockaddr_in *ap;
  socklen_t alen = 0;

    struct servent *svc;

    family = fam;
    memset(&addr, 0, sizeof(addr));
    snprintf(namebuf, sizeof(namebuf), "%s", name);
    cp = strrchr(namebuf, '/');
    if(!cp)
        cp = strrchr(namebuf, ':');

    if(!cp) {
        cp = namebuf;
        name = "*";
    }
    else {
        name = namebuf;
        *(cp++) = 0;
    }

    addr.sin_family = family;
    if(isdigit(*cp))
        addr.sin_port = htons(atoi(cp));
    else {
        mutex.enter();
        svc = getservbyname(cp, "dccp");
        if(svc)
            addr.sin_port = svc->s_port;
        mutex.leave();
        if(!svc) {
            endSocket();
            error(errBindingFailed, "Could not find service", errno);
            return;

        }
    }

#if defined(SO_REUSEADDR)
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_REUSEADDR, (char *)&opt,
            (socklen_t)sizeof(opt));
#endif

    switch(family) {
#ifdef  CCXX_IPV6
    case IPV6:
        IPV6Address ia6(name);
        addr6.sin6_port = addr.sin_port;
        addr6.sin6_family = family;
        ap = &addr6;
        alen = sizeof(addr6);
        break;
#endif
    case IPV4:
        IPV4Address ia(name);
        addr.sin_addr = getaddress(ia);
        ap = &addr;
    alen = sizeof(addr);
    }

    if(bind(so, (struct sockaddr *)ap, alen)) {
        endSocket();
        error(errBindingFailed,(char *)"Could not bind socket",socket_errno);
        return;
    }

    if(listen(so, backlog)) {
        endSocket();
        error(errBindingFailed,(char *)"Could not listen on socket",
                socket_errno);
        return;
    }
    state = BOUND;
}
#endif

DCCPSocket::DCCPSocket(const IPV4Address &ia, tpport_t port, unsigned backlog) :
Socket(AF_INET, SOCK_DCCP, IPPROTO_DCCP)
{
    struct sockaddr_in addr;

    memset(&addr, 0, sizeof(addr));
    addr.sin_family = AF_INET;
    addr.sin_addr = getaddress(ia);
    addr.sin_port = htons(port);
    family = IPV4;

    memset(&peer, 0, sizeof(peer));
    peer.ipv4 = addr;

#if defined(SO_REUSEADDR)
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_REUSEADDR, (char *)&opt, (socklen_t)sizeof(opt));
#endif
    if(bind(so, (struct sockaddr *)&addr, sizeof(addr))) {
        endSocket();
        error(errBindingFailed,(char *)"Could not bind socket",socket_errno);
        return;
    }

    if(listen(so, backlog)) {
        endSocket();
        error(errBindingFailed,(char *)"Could not listen on socket",socket_errno);
        return;
    }
    state = BOUND;
}

#ifdef CCXX_IPV6
DCCPSocket::DCCPSocket(const IPV6Address &ia, tpport_t port, unsigned backlog) :
Socket(AF_INET6, SOCK_DCCP, IPPROTO_DCCP)
{
    struct sockaddr_in6 addr;

    memset(&addr, 0, sizeof(addr));
    addr.sin6_family = AF_INET6;
    addr.sin6_addr = getaddress(ia);
    addr.sin6_port = htons(port);

    family = IPV6;
    memset(&peer, 0, sizeof(peer));
    peer.ipv6 = addr;

#if defined(SO_REUSEADDR)
    int opt = 1;
    setsockopt(so, SOL_SOCKET, SO_REUSEADDR, (char *)&opt, (socklen_t)sizeof(opt));
#endif
    if(bind(so, (struct sockaddr *)&addr, sizeof(addr))) {
        endSocket();
        error(errBindingFailed,(char *)"Could not bind socket",socket_errno);
        return;
    }

    if(listen(so, backlog)) {
        endSocket();
        error(errBindingFailed,(char *)"Could not listen on socket",socket_errno);
        return;
    }
    state = BOUND;
}

bool DCCPSocket::onAccept(const IPV6Host &ia, tpport_t port)
{
    return true;
}

#endif

bool DCCPSocket::onAccept(const IPV4Host &ia, tpport_t port)
{
    return true;
}

IPV4Host DCCPSocket::getIPV4Sender(tpport_t *port) const
{
    if(port)
        *port = ntohs(peer.ipv4.sin_port);
    return IPV4Host(peer.ipv4.sin_addr);
}

#ifdef  CCXX_IPV6
IPV6Host DCCPSocket::getIPV6Sender(tpport_t *port) const
{
    return IPV6Host(peer.ipv6.sin6_addr);
}
#endif

DCCPSocket::~DCCPSocket()
{
    endSocket();
}

void DCCPSocket::disconnect(void)
{
    if(Socket::state != CONNECTED)
        return;

    endSocket();
    so = socket(family, SOCK_DCCP, IPPROTO_DCCP);
    if(so != INVALID_SOCKET)
        Socket::state = AVAILABLE;
}

#ifdef  HAVE_GETADDRINFO
void DCCPSocket::connect(const char *target)
{
    char namebuf[128];
    char *cp;
    struct addrinfo hint, *list = NULL, *next, *first;
    bool connected = false;

    snprintf(namebuf, sizeof(namebuf), "%s", target);
    cp = strrchr(namebuf, '/');
    if(!cp)
        cp = strrchr(namebuf, ':');

    if(!cp) {
        connectError();
        return;
    }

    *(cp++) = 0;

    memset(&hint, 0, sizeof(hint));
    hint.ai_family = family;
    hint.ai_socktype = SOCK_DCCP;
    hint.ai_protocol = IPPROTO_DCCP;

    if(getaddrinfo(namebuf, cp, &hint, &list) || !list) {
        connectError();
        return;
    }

    first = list;

    while(list) {
        if(!::connect(so, list->ai_addr, (socklen_t)list->ai_addrlen)) {
            connected = true;
            break;
        }
        next = list->ai_next;
        list = next;
    }

    freeaddrinfo(first);

    if(!connected) {
        connectError();
        return;
    }

    Socket::state = CONNECTED;
}
#else
void DCCPSocket::connect(const char *target)
{
    char namebuf[128];
    char *cp;
    bool connected = false;
    struct servent *svc;
    tpport_t port;

    snprintf(namebuf, sizeof(namebuf), "%s", target);
    cp = strrchr(namebuf, '/');
    if(!cp)
        cp = strrchr(namebuf, ':');

    if(!cp) {
        connectError();
        return;
    }

    *(cp++) = 0;

    if(isdigit(*cp))
        port = atoi(cp);
    else {
        mutex.enter();
        svc = getservbyname(cp, "dccp");
        if(svc)
            port = ntohs(svc->s_port);
        mutex.leave();
        if(!svc) {
            connectError();
            return;
        }
    }

    switch(family) {
    case IPV4:
        connect(IPV4Host(namebuf), port);
        break;
#ifdef  CCXX_IPV6
    case IPV6:
        connect(IPV6Host(namebuf), port);
        break;
#endif
    default:
        connectError();
    }
}
#endif

void DCCPSocket::connect(const IPV4Host &host, tpport_t port, timeout_t timeout)
{
    size_t i;
    fd_set fds;
    struct timeval to;
    bool connected = false;
    int rtn;
    int sockopt;
    socklen_t len = sizeof(sockopt);

    for(i = 0 ; i < host.getAddressCount(); i++) {
        struct sockaddr_in addr;
        memset(&addr, 0, sizeof(addr));
        addr.sin_family = AF_INET;
        addr.sin_addr = host.getAddress(i);
        addr.sin_port = htons(port);

        if(timeout)
            setCompletion(false);

        // Win32 will crash if you try to connect to INADDR_ANY.
        if ( INADDR_ANY == addr.sin_addr.s_addr )
            addr.sin_addr.s_addr = INADDR_LOOPBACK;
        rtn = ::connect(so, (struct sockaddr *)&addr, (socklen_t)sizeof(addr));
        if(!rtn) {
            connected = true;
            break;
        }

#ifndef WIN32
        if(errno == EINPROGRESS)
#else
            if(WSAGetLastError() == WSAEINPROGRESS)
#endif
            {
                FD_ZERO(&fds);
                FD_SET(so, &fds);
                to.tv_sec = timeout / 1000;
                to.tv_usec = timeout % 1000 * 1000;

                // timeout check for connect completion

                if(::select((int)so + 1, NULL, &fds, NULL, &to) < 1)
                    continue;

                getsockopt(so, SOL_SOCKET, SO_ERROR, (char *)&sockopt, &len);
                if(!sockopt) {
                    connected = true;
                    break;
                }
                endSocket();
                so = socket(AF_INET, SOCK_DCCP, IPPROTO_DCCP);
                if(so == INVALID_SOCKET)
                    break;
            }
    }

    setCompletion(true);
    if(!connected) {
        rtn = errno;
        errno = rtn;
        connectError();
        return;
    }

    Socket::state = CONNECTED;
}

#ifdef  CCXX_IPV6
void DCCPSocket::connect(const IPV6Host &host, tpport_t port, timeout_t timeout)
{
    size_t i;
    fd_set fds;
    struct timeval to;
    bool connected = false;
    int rtn;
    int sockopt;
    socklen_t len = sizeof(sockopt);

    for(i = 0 ; i < host.getAddressCount(); i++) {
        struct sockaddr_in6 addr;
        memset(&addr, 0, sizeof(addr));
        addr.sin6_family = AF_INET6;
        addr.sin6_addr = host.getAddress(i);
        addr.sin6_port = htons(port);

        if(timeout)
            setCompletion(false);

        // Win32 will crash if you try to connect to INADDR_ANY.
        if ( !memcmp(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any)))
            memcpy(&addr.sin6_addr, &in6addr_loopback, sizeof(in6addr_loopback));
        rtn = ::connect(so, (struct sockaddr *)&addr, (socklen_t)sizeof(addr));
        if(!rtn) {
            connected = true;
            break;
        }

#ifndef WIN32
        if(errno == EINPROGRESS)
#else
            if(WSAGetLastError() == WSAEINPROGRESS)
#endif
            {
                FD_ZERO(&fds);
                FD_SET(so, &fds);
                to.tv_sec = timeout / 1000;
                to.tv_usec = timeout % 1000 * 1000;

                // timeout check for connect completion

                if(::select((int)so + 1, NULL, &fds, NULL, &to) < 1)
                    continue;

                getsockopt(so, SOL_SOCKET, SO_ERROR, (char *)&sockopt, &len);
                if(!sockopt) {
                    connected = true;
                    break;
                }
                endSocket();
                so = socket(AF_INET6, SOCK_DCCP, IPPROTO_DCCP);
                if(so == INVALID_SOCKET)
                    break;
            }
    }

    setCompletion(true);
    if(!connected) {
        rtn = errno;
        errno = rtn;
        connectError();
        return;
    }

    Socket::state = CONNECTED;
}
#endif

bool DCCPSocket::setCCID(uint8 ccid)
{
    uint8 ccids[16];             /* for getting the available CCIDs, should be large enough */
    socklen_t len = sizeof(ccids);
    int ret;
    bool ccid_supported = false;

    /*
     * Determine which CCIDs are available on the host
     */
    ret = getsockopt(so, SOL_DCCP, DCCP_SOCKOPT_AVAILABLE_CCIDS, (char *)&ccids, &len);
    if (ret < 0) {
        error(errInput,(char *)"Can not determine available CCIDs",socket_errno);
        return false;
    }

    for (unsigned i = 0; i < sizeof(ccids); i++) {
        if (ccid == ccids[i]) {
            ccid_supported = true;
            break;
        }
    }

    if (!ccid_supported) {
        error(errInput,(char *)"CCID specified is not supported",socket_errno);
        return false;
    }

    if (setsockopt(so, SOL_DCCP, DCCP_SOCKOPT_CCID, (char *)&ccid, sizeof (ccid)) < 0) {
        error(errInput,(char *)"Can not set CCID",socket_errno);
        return false;
    }

    return true;
}

int DCCPSocket::getTxCCID()
{
    int ccid, ret;
    socklen_t ccidlen;

    ccidlen = sizeof(ccid);
    ret = getsockopt(so, SOL_DCCP, DCCP_SOCKOPT_TX_CCID, (char *)&ccid, &ccidlen);
    if (ret < 0) {
    error(errInput,(char *)"Can not determine get current TX CCID value",socket_errno);
        return -1;
    }
    return ccid;
}

int DCCPSocket::getRxCCID()
{
    int ccid, ret;
    socklen_t ccidlen;

    ccidlen = sizeof(ccid);
    ret = getsockopt(so, SOL_DCCP, DCCP_SOCKOPT_RX_CCID, (char *)&ccid, &ccidlen);
    if (ret < 0) {
    error(errInput,(char *)"Can not determine get current DX CCID value",socket_errno);
        return -1;
    }
    return ccid;
}

#ifndef WIN32
#include <sys/ioctl.h>
#endif
size_t  DCCPSocket::available()
{
    size_t readsize;
#ifndef WIN32
     if (ioctl (so, FIONREAD, &readsize) < 0) {
         error(errInput,(char *)"Error on retrieve the FIONREAD option.",socket_errno);
     }
#else
    if (ioctlsocket(so, FIOREAD, &readsize)){
        error(errInput,(char *)"Error on retrieve the FIONREAD option.",socket_errno);
    }
#endif
    return readsize;
}

TCPStream::TCPStream(TCPSocket &server, bool throwflag, timeout_t to) :
    streambuf(), Socket(accept(server.getSocket(), NULL, NULL)),
#ifdef  HAVE_OLD_IOSTREAM
    iostream()
#else
    iostream((streambuf *)this)
#endif
    ,bufsize(0)
    ,gbuf(NULL)
    ,pbuf(NULL) {
    tpport_t port;
    family = IPV4;

#ifdef  HAVE_OLD_IOSTREAM
    init((streambuf *)this);
#endif

    timeout = to;
    setError(throwflag);
    IPV4Host host = getPeer(&port);
    if(!server.onAccept(host, port)) {
        endSocket();
        error(errConnectRejected);
        clear(ios::failbit | rdstate());
        return;
    }

    segmentBuffering(server.getSegmentSize());
    Socket::state = CONNECTED;
}

#ifdef  CCXX_IPV6
TCPStream::TCPStream(TCPV6Socket &server, bool throwflag, timeout_t to) :
    streambuf(), Socket(accept(server.getSocket(), NULL, NULL)),
#ifdef  HAVE_OLD_IOSTREAM
    iostream()
#else
    iostream((streambuf *)this)
#endif
    ,bufsize(0)
    ,gbuf(NULL)
    ,pbuf(NULL) {
    tpport_t port;

    family = IPV6;

#ifdef  HAVE_OLD_IOSTREAM
    init((streambuf *)this);
#endif

    timeout = to;
    setError(throwflag);
    IPV6Host host = getIPV6Peer(&port);
    if(!server.onAccept(host, port)) {
        endSocket();
        error(errConnectRejected);
        clear(ios::failbit | rdstate());
        return;
    }

    segmentBuffering(server.getSegmentSize());
    Socket::state = CONNECTED;
}
#endif

TCPStream::TCPStream(const IPV4Host &host, tpport_t port, unsigned size, bool throwflag, timeout_t to) :
    streambuf(), Socket(AF_INET, SOCK_STREAM, IPPROTO_TCP),
#ifdef  HAVE_OLD_IOSTREAM
    iostream(),
#else
    iostream((streambuf *)this),
#endif
    bufsize(0),gbuf(NULL),pbuf(NULL) {
#ifdef  HAVE_OLD_IOSTREAM
    init((streambuf *)this);
#endif
    family = IPV4;
    timeout = to;
    setError(throwflag);
    connect(host, port, size);
}

#ifdef  CCXX_IPV6
TCPStream::TCPStream(const IPV6Host &host, tpport_t port, unsigned size, bool throwflag, timeout_t to) :
    streambuf(), Socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP),
#ifdef  HAVE_OLD_IOSTREAM
    iostream(),
#else
    iostream((streambuf *)this),
#endif
    bufsize(0),gbuf(NULL),pbuf(NULL) {
    family = IPV6;

#ifdef  HAVE_OLD_IOSTREAM
    init((streambuf *)this);
#endif
    timeout = to;
    setError(throwflag);
    connect(host, port, size);
}
#endif

TCPStream::~TCPStream()
{
#ifdef  CCXX_EXCEPTIONS
        try { endStream(); }
        catch( ... ) { if ( ! std::uncaught_exception()) throw;};
#else
        endStream();
#endif
}

#ifdef  HAVE_GETADDRINFO

void TCPStream::connect(const char *target, unsigned mss)
{
    char namebuf[128];
    char *cp;
    struct addrinfo hint, *list = NULL, *next, *first;
    bool connected = false;

    snprintf(namebuf, sizeof(namebuf), "%s", target);
    cp = strrchr(namebuf, '/');
    if(!cp)
        cp = strrchr(namebuf, ':');

    if(!cp) {
        endStream();
        connectError();
        return;
    }

    *(cp++) = 0;

    memset(&hint, 0, sizeof(hint));
    hint.ai_family = family;
    hint.ai_socktype = SOCK_STREAM;
    hint.ai_protocol = IPPROTO_TCP;

    if(getaddrinfo(namebuf, cp, &hint, &list) || !list) {
        endStream();
        connectError();
        return;
    }

    first = list;

#ifdef  TCP_MAXSEG
    if(mss)
        setsockopt(so, IPPROTO_TCP, TCP_MAXSEG, (char *)&mss, sizeof(mss));
#endif

    while(list) {
        if(!::connect(so, list->ai_addr, (socklen_t)list->ai_addrlen)) {
            connected = true;
            break;
        }
        next = list->ai_next;
        list = next;
    }

    freeaddrinfo(first);

    if(!connected) {
        endStream();
        connectError();
        return;
    }

    segmentBuffering(mss);
    Socket::state = CONNECTED;
}

#else

void TCPStream::connect(const char *target, unsigned mss)
{
    char namebuf[128];
    char *cp;
    bool connected = false;
    struct servent *svc;
    tpport_t port;

    snprintf(namebuf, sizeof(namebuf), "%s", target);
    cp = strrchr(namebuf, '/');
    if(!cp)
        cp = strrchr(namebuf, ':');

    if(!cp) {
        endStream();
        connectError();
        return;
    }

    *(cp++) = 0;

    if(isdigit(*cp))
        port = atoi(cp);
    else {
        mutex.enter();
        svc = getservbyname(cp, "tcp");
        if(svc)
            port = ntohs(svc->s_port);
        mutex.leave();
        if(!svc) {
            endStream();
            connectError();
            return;
        }
    }

    switch(family) {
    case IPV4:
        connect(IPV4Host(namebuf), port, mss);
        break;
#ifdef  CCXX_IPV6
    case IPV6:
        connect(IPV6Host(namebuf), port, mss);
        break;
#endif
    default:
        endStream();
        connectError();
    }
}

#endif

void TCPStream::connect(const IPV4Host &host, tpport_t port, unsigned mss)
{
    size_t i;
    fd_set fds;
    struct timeval to;
    bool connected = false;
    int rtn;
    int sockopt;
    socklen_t len = sizeof(sockopt);

#ifdef  TCP_MAXSEG
    if(mss)
        setsockopt(so, IPPROTO_TCP, TCP_MAXSEG, (char *)&mss, sizeof(mss));
#endif

    for(i = 0 ; i < host.getAddressCount(); i++) {
        struct sockaddr_in addr;
        memset(&addr, 0, sizeof(addr));
        addr.sin_family = AF_INET;
        addr.sin_addr = host.getAddress(i);
        addr.sin_port = htons(port);

        if(timeout)
            setCompletion(false);

        // Win32 will crash if you try to connect to INADDR_ANY.
        if ( INADDR_ANY == addr.sin_addr.s_addr )
            addr.sin_addr.s_addr = INADDR_LOOPBACK;
        rtn = ::connect(so, (struct sockaddr *)&addr, (socklen_t)sizeof(addr));
        if(!rtn) {
            connected = true;
            break;
        }

#ifndef WIN32
        if(errno == EINPROGRESS)
#else
        if(WSAGetLastError() == WSAEINPROGRESS)
#endif
        {
            FD_ZERO(&fds);
            FD_SET(so, &fds);
            to.tv_sec = timeout / 1000;
            to.tv_usec = timeout % 1000 * 1000;

            // timeout check for connect completion

            if(::select((int)so + 1, NULL, &fds, NULL, &to) < 1)
                continue;

            getsockopt(so, SOL_SOCKET, SO_ERROR, (char *)&sockopt, &len);
            if(!sockopt) {
                connected = true;
                break;
            }
            endSocket();
            so = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
            if(so == INVALID_SOCKET)
                break;
        }
    }

    setCompletion(true);
    if(!connected) {
        rtn = errno;
        endStream();
        errno = rtn;
        connectError();
        return;
    }

    segmentBuffering(mss);
    Socket::state = CONNECTED;
}

#ifdef  CCXX_IPV6
void TCPStream::connect(const IPV6Host &host, tpport_t port, unsigned mss)
{
    size_t i;
    fd_set fds;
    struct timeval to;
    bool connected = false;
    int rtn;
    int sockopt;
    socklen_t len = sizeof(sockopt);

#ifdef  TCP_MAXSEG
    if(mss)
        setsockopt(so, IPPROTO_TCP, TCP_MAXSEG, (char *)&mss, sizeof(mss));
#endif

    for(i = 0 ; i < host.getAddressCount(); i++) {
        struct sockaddr_in6 addr;
        memset(&addr, 0, sizeof(addr));
        addr.sin6_family = AF_INET6;
        addr.sin6_addr = host.getAddress(i);
        addr.sin6_port = htons(port);

        if(timeout)
            setCompletion(false);

        // Win32 will crash if you try to connect to INADDR_ANY.
        if ( !memcmp(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any)))
            memcpy(&addr.sin6_addr, &in6addr_loopback, sizeof(in6addr_loopback));
        rtn = ::connect(so, (struct sockaddr *)&addr, (socklen_t)sizeof(addr));
        if(!rtn) {
            connected = true;
            break;
        }

#ifndef WIN32
        if(errno == EINPROGRESS)
#else
        if(WSAGetLastError() == WSAEINPROGRESS)
#endif
        {
            FD_ZERO(&fds);
            FD_SET(so, &fds);
            to.tv_sec = timeout / 1000;
            to.tv_usec = timeout % 1000 * 1000;

            // timeout check for connect completion

            if(::select((int)so + 1, NULL, &fds, NULL, &to) < 1)
                continue;

            getsockopt(so, SOL_SOCKET, SO_ERROR, (char *)&sockopt, &len);
            if(!sockopt) {
                connected = true;
                break;
            }
            endSocket();
            so = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
            if(so == INVALID_SOCKET)
                break;
        }
    }

    setCompletion(true);
    if(!connected) {
        rtn = errno;
        endStream();
        errno = rtn;
        connectError();
        return;
    }

    segmentBuffering(mss);
    Socket::state = CONNECTED;
}
#endif

TCPStream::TCPStream(const char *target, Family fam, unsigned mss, bool throwflag, timeout_t to) :
streambuf(), Socket(PF_INET, SOCK_STREAM, IPPROTO_TCP),
#ifdef  HAVE_OLD_IOSTREAM
iostream(),
#else
iostream((streambuf *)this),
#endif
timeout(to), bufsize(0),gbuf(NULL),pbuf(NULL)
{
    family = fam;
#ifdef  HAVE_OLD_IOSTREAM
    init((streambuf *)this);
#endif
    setError(throwflag);
    connect(target, mss);
}

TCPStream::TCPStream(Family fam, bool throwflag, timeout_t to) :
streambuf(), Socket(PF_INET, SOCK_STREAM, IPPROTO_TCP),
#ifdef  HAVE_OLD_IOSTREAM
iostream(),
#else
iostream((streambuf *)this),
#endif
timeout(to), bufsize(0),gbuf(NULL),pbuf(NULL)
{
    family = fam;
#ifdef  HAVE_OLD_IOSTREAM
    init((streambuf *)this);
#endif
    setError(throwflag);
}

TCPStream::TCPStream(const TCPStream &source) :
streambuf(), Socket(DUP_SOCK(source.so,source.state)),
#ifdef  HAVE_OLD_IOSTREAM
iostream()
#else
iostream((streambuf *)this)
#endif
{
    family = source.family;
#ifdef  HAVE_OLD_IOSTREAM
    init((streambuf *)this);
#endif
    bufsize = source.bufsize;
    allocate(bufsize);
}

void TCPStream::connect(TCPSocket &tcpip)
{
    tpport_t port;

    endStream();
    family = IPV4;
    so = accept(tcpip.getSocket(), NULL, NULL);
    if(so == INVALID_SOCKET)
        return;

    IPV4Host host = getPeer(&port);
    if(!tcpip.onAccept(host, port)) {
        endSocket();
        clear(ios::failbit | rdstate());
        return;
    }

    segmentBuffering(tcpip.getSegmentSize());
    Socket::state = CONNECTED;
}

#ifdef  CCXX_IPV6

void TCPStream::connect(TCPV6Socket &tcpip)
{
    tpport_t port;

    endStream();
    family = IPV6;
    so = accept(tcpip.getSocket(), NULL, NULL);
    if(so == INVALID_SOCKET)
        return;

    IPV6Host host = getIPV6Peer(&port);
    if(!tcpip.onAccept(host, port)) {
        endSocket();
        clear(ios::failbit | rdstate());
        return;
    }

    segmentBuffering(tcpip.getSegmentSize());
        Socket::state = CONNECTED;
}
#endif

void TCPStream::segmentBuffering(unsigned mss)
{
    unsigned max = 0;
    socklen_t alen = sizeof(max);

    if(mss == 1) {  // special interactive
        allocate(1);
        return;
    }

#ifdef  TCP_MAXSEG
    if(mss)
        setsockopt(so, IPPROTO_TCP, TCP_MAXSEG, (char *)&max, sizeof(max));
    getsockopt(so, IPPROTO_TCP, TCP_MAXSEG, (char *)&max, &alen);
#endif

    if(max && max < mss)
        mss = max;

    if(!mss) {
        if(max)
            mss = max;
        else
            mss = 536;
        allocate(mss);
        return;
    }

#ifdef  TCP_MAXSEG
    setsockopt(so, IPPROTO_TCP, TCP_MAXSEG, (char *)&mss, sizeof(mss));
#endif

    if(mss < 80)
        mss = 80;

    if(mss * 7 < 64000)
        bufferSize(mss * 7);
    else if(mss * 6 < 64000)
        bufferSize(mss * 6);
    else
        bufferSize(mss * 5);

    if(mss < 512)
        sendLimit(mss * 4);

    allocate(mss);
}

int TCPStream::getSegmentSize(void)
{
    unsigned mss = 0;
#ifdef  TCP_MAXSEG
    socklen_t alen = sizeof(mss);

    getsockopt(so, IPPROTO_TCP, TCP_MAXSEG, (char *)&mss, &alen);
#endif
    if(!mss)
        return (int)bufsize;

    return mss;
}

void TCPStream::disconnect(void)
{
    if(Socket::state == AVAILABLE)
        return;

    endStream();
    so = socket(family, SOCK_STREAM, IPPROTO_TCP);
    if(so != INVALID_SOCKET)
        Socket::state = AVAILABLE;
}

void TCPStream::endStream(void)
{
    if(bufsize)
        sync();
    if(gbuf)
        delete[] gbuf;
    if(pbuf)
        delete[] pbuf;
    gbuf = pbuf = NULL;
    bufsize = 0;
    clear();
    endSocket();
}

void TCPStream::allocate(size_t size)
{
    if(size < 2) {
        bufsize = 1;
        gbuf = pbuf = 0;
        return;
    }

    gbuf = new char[size];
    pbuf = new char[size];
    if(!pbuf || !gbuf) {
        error(errResourceFailure, (char *)"Could not allocate socket stream buffers");
        return;
    }
    bufsize = size;
    clear();

#if (defined(__GNUC__) && (__GNUC__ < 3)) && !defined(WIN32) && !defined(STLPORT)
    setb(gbuf, gbuf + size, 0);
#endif
    setg(gbuf, gbuf + size, gbuf + size);
    setp(pbuf, pbuf + size);
}

int TCPStream::doallocate()
{
    if(bufsize)
        return 0;

    allocate(1);
    return 1;
}

int TCPStream::uflow()
{
    int ret = underflow();

    if (ret == EOF)
        return EOF;

    if (bufsize != 1)
        gbump(1);

    return ret;
}

int TCPStream::underflow()
{
    ssize_t rlen = 1;
    unsigned char ch;

    if(bufsize == 1) {
        if(Socket::state == STREAM)
            rlen = ::read((int)so, (char *)&ch, 1);
        else if(timeout && !Socket::isPending(pendingInput, timeout)) {
            clear(ios::failbit | rdstate());
            error(errTimeout,(char *)"Socket read timed out",socket_errno);
            return EOF;
        }
        else
            rlen = readData(&ch, 1);
        if(rlen < 1) {
            if(rlen < 0) {
                clear(ios::failbit | rdstate());
                error(errInput,(char *)"Could not read from socket",socket_errno);
            }
            return EOF;
        }
        return ch;
    }

    if(!gptr())
        return EOF;

    if(gptr() < egptr())
        return (unsigned char)*gptr();

    rlen = (ssize_t)((gbuf + bufsize) - eback());
    if(Socket::state == STREAM)
        rlen = ::read((int)so, (char *)eback(), _IOLEN64 rlen);
    else if(timeout && !Socket::isPending(pendingInput, timeout)) {
        clear(ios::failbit | rdstate());
        error(errTimeout,(char *)"Socket read timed out",socket_errno);
        return EOF;
    }
    else
        rlen = readData(eback(), rlen);
    if(rlen < 1) {
//      clear(ios::failbit | rdstate());
        if(rlen < 0)
                        error(errNotConnected,(char *)"Connection error",socket_errno);
        else {
            error(errInput,(char *)"Could not read from socket",socket_errno);
            clear(ios::failbit | rdstate());
        }
        return EOF;
    }
    error(errSuccess);

    setg(eback(), eback(), eback() + rlen);
    return (unsigned char) *gptr();
}

bool TCPStream::isPending(Pending pending, timeout_t timer)
{
    if(pending == pendingInput && in_avail())
        return true;
    else if(pending == pendingOutput)
        flush();

    return Socket::isPending(pending, timer);
}

int TCPStream::sync(void)
{
    overflow(EOF);
    setg(gbuf, gbuf + bufsize, gbuf + bufsize);
    return 0;
}

#ifdef  HAVE_SNPRINTF
size_t TCPStream::printf(const char *format, ...)
{
    va_list args;
    size_t len;
    char *buf;

    va_start(args, format);
    overflow(EOF);
    len = pptr() - pbase();
    buf = pptr();
    vsnprintf(buf, len, format, args);
    va_end(args);
    len = strlen(buf);
    if(Socket::state == STREAM)
        return ::write((int)so, buf, _IOLEN64 len);
    else
        return writeData(buf, len);
}
#endif

int TCPStream::overflow(int c)
{
    unsigned char ch;
    ssize_t rlen, req;

    if(bufsize == 1) {
        if(c == EOF)
            return 0;

        ch = (unsigned char)(c);
        if(Socket::state == STREAM)
            rlen = ::write((int)so, (const char *)&ch, 1);
        else
            rlen = writeData(&ch, 1);
        if(rlen < 1) {
            if(rlen < 0) {
                clear(ios::failbit | rdstate());
                error(errOutput,(char *)"Could not write to socket",socket_errno);
            }
            return EOF;
        }
        else
            return c;
    }

    if(!pbase())
        return EOF;

    req = (ssize_t)(pptr() - pbase());
    if(req) {
        if(Socket::state == STREAM)
            rlen = ::write((int)so, (const char *)pbase(), req);
        else
            rlen = writeData(pbase(), req);
        if(rlen < 1) {
            if(rlen < 0) {
                clear(ios::failbit | rdstate());
                error(errOutput,(char *)"Could not write to socket",socket_errno);
            }
            return EOF;
        }
        req -= rlen;
    }

    // if write "partial", rebuffer remainder

    if(req)
//      memmove(pbuf, pptr() + rlen, req);
        memmove(pbuf, pbuf + rlen, req);
    setp(pbuf, pbuf + bufsize);
    pbump(req);

    if(c != EOF) {
        *pptr() = (unsigned char)c;
        pbump(1);
    }
    return c;
}

TCPSession::TCPSession(const IPV4Host &ia, tpport_t port, size_t size, int pri, size_t stack) :
Thread(pri, stack), TCPStream(IPV4)
{
    setCompletion(false);
    setError(false);
    allocate(size);

    size_t i;
    for(i = 0 ; i < ia.getAddressCount(); i++) {
        struct sockaddr_in addr;
        memset(&addr, 0, sizeof(addr));
        addr.sin_family = AF_INET;
        addr.sin_addr = ia.getAddress(i);
        addr.sin_port = htons(port);

        // Win32 will crash if you try to connect to INADDR_ANY.
        if ( INADDR_ANY == addr.sin_addr.s_addr )
            addr.sin_addr.s_addr = INADDR_LOOPBACK;
        if(::connect(so, (struct sockaddr *)&addr, (socklen_t)sizeof(addr)) == 0)
            break;

#ifdef WIN32
        if(WSAGetLastError() == WSAEISCONN || WSAGetLastError() == WSAEWOULDBLOCK)
#else
        if(errno == EINPROGRESS)
#endif
        {
            Socket::state = CONNECTING;
            return;
        }
    }

    if(i == ia.getAddressCount()) {
        endSocket();
        Socket::state = INITIAL;
        return;
    }

    setCompletion(true);
    Socket::state = CONNECTED;
}

#ifdef  CCXX_IPV6
TCPSession::TCPSession(const IPV6Host &ia, tpport_t port, size_t size, int pri, size_t stack) :
Thread(pri, stack), TCPStream(IPV6)
{
    setCompletion(false);
    setError(false);
    allocate(size);

    size_t i;
    for(i = 0 ; i < ia.getAddressCount(); i++) {
        struct sockaddr_in6 addr;
        memset(&addr, 0, sizeof(addr));
        addr.sin6_family = AF_INET6;
        addr.sin6_addr = ia.getAddress(i);
        addr.sin6_port = htons(port);

        // Win32 will crash if you try to connect to INADDR_ANY.
        if(!memcmp(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any)))
            memcpy(&addr.sin6_addr, &in6addr_loopback, sizeof(in6addr_loopback));
        if(::connect(so, (struct sockaddr *)&addr, (socklen_t)sizeof(addr)) == 0)
            break;

#ifdef WIN32
//      if(WSAGetLastError() == WSAEWOULDBLOCK)
        if(WSAGetLastError() == WSAEISCONN)
#else
        if(errno == EINPROGRESS)
#endif
        {
            Socket::state = CONNECTING;
            return;
        }
    }

    if(i == ia.getAddressCount()) {
        endSocket();
        Socket::state = INITIAL;
        return;
    }

    setCompletion(true);
    Socket::state = CONNECTED;
}
#endif


TCPSession::TCPSession(TCPSocket &s, int pri, size_t stack) :
Thread(pri, stack), TCPStream(s)
{
    setCompletion(true);
    setError(false);
}

#ifdef  CCXX_IPV6
TCPSession::TCPSession(TCPV6Socket &s, int pri, size_t stack) :
Thread(pri, stack), TCPStream(s)
{
    setCompletion(true);
    setError(false);
}
#endif

TCPSession::~TCPSession()
{
    endStream();
}

int TCPSession::waitConnection(timeout_t timer)
{
    int sockopt = 0;
    socklen_t len = sizeof(sockopt);

    switch(Socket::state) {
    case INITIAL:
        return -1;
    case CONNECTED:
        break;
    case CONNECTING:
        if(!Socket::isPending(pendingOutput, timer)) {
            endSocket();
            Socket::state = INITIAL;
            return -1;
        }

        getsockopt(so, SOL_SOCKET, SO_ERROR, (char *)&sockopt, &len);
        if(sockopt) {
            endSocket();
            Socket::state = INITIAL;
            return -1;
        }
    default:
        break;
    }
    Socket::state = CONNECTED;
    return 0;
}

void TCPSession::initial(void)
{
    if(waitConnection(60000))
        exit();
}

ostream& operator<<(ostream &os, const IPV4Address &ia)
{
    os << inet_ntoa(getaddress(ia));
    return os;
}

#ifdef WIN32
init_WSA::init_WSA()
{
    //-initialize OS socket resources!
    WSADATA wsaData;

    if (WSAStartup(MAKEWORD(2, 2), &wsaData)) {
        abort();
    }
};

init_WSA::~init_WSA()
{
    WSACleanup();
}

init_WSA init_wsa;
#endif

#ifdef  CCXX_NAMESPACES
}
#endif

/** EMACS **
 * Local variables:
 * mode: c++
 * c-basic-offset: 4
 * End:
 */