Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2240 insertions, 0 deletions

diff --git a/sal/osl/unx/socket.cxx b/sal/osl/unx/socket.cxx
new file mode 100644
index 000000000..4f67795a6
--- /dev/null
+++ b/sal/osl/unx/socket.cxx
@@ -0,0 +1,2240 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <utility>
+
+#include "system.hxx"
+
+#include <osl/socket.h>
+#include <osl/mutex.h>
+#include <osl/signal.h>
+
+#include <rtl/alloc.h>
+#include <rtl/byteseq.h>
+#include <rtl/ustring.hxx>
+#include <assert.h>
+#include <sal/types.h>
+#include <sal/log.hxx>
+
+#include "sockimpl.hxx"
+#include "unixerrnostring.hxx"
+
+/* defines for poll */
+#ifdef HAVE_POLL_H
+#undef HAVE_POLL_H
+#endif
+
+#if defined(LINUX) || defined(NETBSD) || defined ( FREEBSD ) || \
+    defined (MACOSX) || defined (OPENBSD) || defined(DRAGONFLY)
+#include <sys/poll.h>
+#define HAVE_POLL_H
+#endif /* HAVE_POLL_H */
+
+#if defined(__sun)
+#include <poll.h>
+#define HAVE_POLL_H
+#endif /* __sun */
+
+#ifndef HAVE_POLL_H
+#define POLLIN  0x0001
+#define POLLOUT 0x0002
+#define POLLPRI 0x0004
+#endif /* HAVE_POLL_H */
+
+/* defines for shutdown */
+#define SD_RECEIVE 0
+#define SD_SEND 1
+#define SD_BOTH 2
+
+/*
+    oslSocketAddr is a pointer to a Berkeley struct sockaddr.
+    I refrained from using sockaddr_in because of possible further
+    extensions of this socket-interface (IP-NG?).
+    The intention was to hide all Berkeley data-structures from
+    direct access past the osl-interface.
+
+    The current implementation is internet (IP) centered. All
+    the constructor-functions (osl_create...) take parameters
+    that will probably make sense only in the IP-environment
+    (e.g. because of using the dotted-address-format).
+
+    If the interface will be extended to host other protocol-
+    families, I expect no externally visible changes in the
+    existing functions. You'll probably need only new
+    constructor-functions who take the different address
+    formats into consideration (maybe a long dotted address
+    or whatever).
+*/
+
+/* _Note_ that I rely on the fact that oslSocketAddr and struct sockaddr */
+/* are the same! I don't like it very much but see no other easy way to  */
+/* conceal the struct sockaddr from the eyes of the user. */
+
+#define OSL_INVALID_SOCKET      -1
+#define OSL_SOCKET_ERROR        -1
+
+/* Buffer size for getnameinfo */
+#define MAX_HOSTBUFFER_SIZE 2048
+
+static const unsigned long FamilyMap[]= {
+    AF_INET,                    /* osl_Socket_FamilyInet    */
+    AF_IPX,                     /* osl_Socket_FamilyIpx     */
+    0                           /* osl_Socket_FamilyInvalid */
+};
+
+static oslAddrFamily osl_AddrFamilyFromNative(sal_uInt32 nativeType)
+{
+    oslAddrFamily i= oslAddrFamily(0);
+
+    while(i != osl_Socket_FamilyInvalid)
+    {
+        if(FamilyMap[i] == nativeType)
+            return i;
+        i = static_cast<oslAddrFamily>( i + 1 );
+    }
+
+    return i;
+}
+
+#define FAMILY_FROM_NATIVE(y) osl_AddrFamilyFromNative(y)
+#define FAMILY_TO_NATIVE(x) static_cast<short>(FamilyMap[x])
+
+static const sal_uInt32 ProtocolMap[]= {
+    0,                          /* osl_Socket_ProtocolIp      */
+    NSPROTO_IPX,                /* osl_Socket_ProtocolIpx     */
+    NSPROTO_SPX,                /* osl_Socket_ProtocolSpx     */
+    NSPROTO_SPXII,              /* osl_Socket_ProtocolSpxII   */
+    0                           /* osl_Socket_ProtocolInvalid */
+};
+
+#define PROTOCOL_TO_NATIVE(x)   ProtocolMap[x]
+
+static const sal_uInt32 TypeMap[]= {
+    SOCK_STREAM,                /* osl_Socket_TypeStream    */
+    SOCK_DGRAM,                 /* osl_Socket_TypeDgram     */
+    SOCK_RAW,                   /* osl_Socket_TypeRaw       */
+    SOCK_RDM,                   /* osl_Socket_TypeRdm       */
+    SOCK_SEQPACKET,             /* osl_Socket_TypeSeqPacket */
+    0                           /* osl_Socket_TypeInvalid   */
+};
+
+static oslSocketType osl_SocketTypeFromNative(sal_uInt32 nativeType)
+{
+    oslSocketType i= oslSocketType(0);
+
+    while(i != osl_Socket_TypeInvalid)
+    {
+        if(TypeMap[i] == nativeType)
+            return i;
+        i = static_cast<oslSocketType>(i + 1);
+    }
+
+    return i;
+}
+
+#define TYPE_TO_NATIVE(x)       TypeMap[x]
+#define TYPE_FROM_NATIVE(y)     osl_SocketTypeFromNative(y)
+
+static const sal_uInt32 OptionMap[]= {
+    SO_DEBUG,                   /* osl_Socket_OptionDebug       */
+    SO_ACCEPTCONN,              /* osl_Socket_OptionAcceptConn  */
+    SO_REUSEADDR,               /* osl_Socket_OptionReuseAddr   */
+    SO_KEEPALIVE,               /* osl_Socket_OptionKeepAlive   */
+    SO_DONTROUTE,               /* osl_Socket_OptionDontRoute   */
+    SO_BROADCAST,               /* osl_Socket_OptionBroadcast   */
+    SO_USELOOPBACK,             /* osl_Socket_OptionUseLoopback */
+    SO_LINGER,                  /* osl_Socket_OptionLinger      */
+    SO_OOBINLINE,               /* osl_Socket_OptionOOBinLine   */
+    SO_SNDBUF,                  /* osl_Socket_OptionSndBuf      */
+    SO_RCVBUF,                  /* osl_Socket_OptionRcvBuf      */
+    SO_SNDLOWAT,                /* osl_Socket_OptionSndLowat    */
+    SO_RCVLOWAT,                /* osl_Socket_OptionRcvLowat    */
+    SO_SNDTIMEO,                /* osl_Socket_OptionSndTimeo    */
+    SO_RCVTIMEO,                /* osl_Socket_OptionRcvTimeo    */
+    SO_ERROR,                   /* osl_Socket_OptionError       */
+    SO_TYPE,                    /* osl_Socket_OptionType        */
+    TCP_NODELAY,                /* osl_Socket_OptionTcpNoDelay  */
+    0                           /* osl_Socket_OptionInvalid     */
+};
+
+#define OPTION_TO_NATIVE(x)     OptionMap[x]
+
+static const sal_uInt32 OptionLevelMap[]= {
+    SOL_SOCKET,                 /* osl_Socket_LevelSocket  */
+    IPPROTO_TCP,                /* osl_Socket_LevelTcp     */
+    0                           /* osl_Socket_LevelInvalid */
+};
+
+#define OPTION_LEVEL_TO_NATIVE(x)       OptionLevelMap[x]
+
+static const sal_uInt32 SocketMsgFlagMap[]= {
+    0,                          /* osl_Socket_MsgNormal    */
+    MSG_OOB,                    /* osl_Socket_MsgOOB       */
+    MSG_PEEK,                   /* osl_Socket_MsgPeek      */
+    MSG_DONTROUTE,              /* osl_Socket_MsgDontRoute */
+    MSG_MAXIOVLEN,              /* osl_Socket_MsgMaxIOVLen */
+    0                           /* osl_Socket_MsgInvalid   */
+};
+
+#define MSG_FLAG_TO_NATIVE(x)       SocketMsgFlagMap[x]
+
+static const sal_uInt32 SocketDirection[]= {
+    SD_RECEIVE,                 /* osl_Socket_DirRead      */
+    SD_SEND,                    /* osl_Socket_DirWrite     */
+    SD_BOTH,                    /* osl_Socket_DirReadWrite */
+    0                           /* osl_Socket_DirInvalid   */
+};
+
+#define DIRECTION_TO_NATIVE(x)      SocketDirection[x]
+
+static const struct
+{
+    int            errcode;
+    oslSocketError error;
+} SocketError[]= {
+    { 0,               osl_Socket_E_None              }, /* no error */
+    { ENOTSOCK,        osl_Socket_E_NotSocket         }, /* Socket operation on non-socket */
+    { EDESTADDRREQ,    osl_Socket_E_DestAddrReq       }, /* Destination address required */
+    { EMSGSIZE,        osl_Socket_E_MsgSize           }, /* Message too long */
+    { EPROTOTYPE,      osl_Socket_E_Prototype         }, /* Protocol wrong type for socket */
+    { ENOPROTOOPT,     osl_Socket_E_NoProtocol        }, /* Protocol not available */
+    { EPROTONOSUPPORT, osl_Socket_E_ProtocolNoSupport }, /* Protocol not supported */
+#ifdef ESOCKTNOSUPPORT
+    { ESOCKTNOSUPPORT, osl_Socket_E_TypeNoSupport     }, /* Socket type not supported */
+#endif
+    { EOPNOTSUPP,      osl_Socket_E_OpNotSupport      }, /* Operation not supported on socket */
+    { EPFNOSUPPORT,    osl_Socket_E_PfNoSupport       }, /* Protocol family not supported */
+    { EAFNOSUPPORT,    osl_Socket_E_AfNoSupport       }, /* Address family not supported by
+                                                            protocol family */
+    { EADDRINUSE,      osl_Socket_E_AddrInUse         }, /* Address already in use */
+    { EADDRNOTAVAIL,   osl_Socket_E_AddrNotAvail      }, /* Can't assign requested address */
+    { ENETDOWN,        osl_Socket_E_NetDown           }, /* Network is down */
+    { ENETUNREACH,     osl_Socket_E_NetUnreachable    }, /* Network is unreachable */
+    { ENETRESET,       osl_Socket_E_NetReset          }, /* Network dropped connection because
+                                                            of reset */
+    { ECONNABORTED,    osl_Socket_E_ConnAborted       }, /* Software caused connection abort */
+    { ECONNRESET,      osl_Socket_E_ConnReset         }, /* Connection reset by peer */
+    { ENOBUFS,         osl_Socket_E_NoBufferSpace     }, /* No buffer space available */
+    { EISCONN,         osl_Socket_E_IsConnected       }, /* Socket is already connected */
+    { ENOTCONN,        osl_Socket_E_NotConnected      }, /* Socket is not connected */
+    { ESHUTDOWN,       osl_Socket_E_Shutdown          }, /* Can't send after socket shutdown */
+#ifdef ETOOMANYREFS
+    { ETOOMANYREFS,    osl_Socket_E_TooManyRefs       }, /* Too many references: can't splice */
+#endif
+    { ETIMEDOUT,       osl_Socket_E_TimedOut          }, /* Connection timed out */
+    { ECONNREFUSED,    osl_Socket_E_ConnRefused       }, /* Connection refused */
+    { EHOSTDOWN,       osl_Socket_E_HostDown          }, /* Host is down */
+    { EHOSTUNREACH,    osl_Socket_E_HostUnreachable   }, /* No route to host */
+    { EWOULDBLOCK,     osl_Socket_E_WouldBlock        }, /* call would block on non-blocking socket */
+    { EALREADY,        osl_Socket_E_Already           }, /* operation already in progress */
+    { EINPROGRESS,     osl_Socket_E_InProgress        }, /* operation now in progress */
+    { EAGAIN,          osl_Socket_E_WouldBlock        }, /* same as EWOULDBLOCK */
+    { -1,              osl_Socket_E_InvalidError      }
+};
+
+static oslSocketError osl_SocketErrorFromNative(int nativeType)
+{
+    int i = 0;
+
+    while ((SocketError[i].error != osl_Socket_E_InvalidError) &&
+           (SocketError[i].errcode != nativeType)) i++;
+
+    return SocketError[i].error;
+}
+
+#define ERROR_FROM_NATIVE(y)    osl_SocketErrorFromNative(y)
+
+static oslSocketAddr osl_psz_createInetSocketAddr (
+    const char* pszDottedAddr, sal_Int32 Port);
+
+static oslHostAddr osl_psz_createHostAddr (
+    const char *pszHostname, const oslSocketAddr Addr);
+
+static oslHostAddr osl_psz_createHostAddrByName (
+    const char *pszHostname);
+
+static const char* osl_psz_getHostnameOfHostAddr (
+    const oslHostAddr Addr);
+
+static oslSocketAddr osl_psz_resolveHostname (
+    const char* pszHostname);
+
+static sal_Int32 osl_psz_getServicePort (
+    const char* pszServicename, const char* pszProtocol);
+
+static void osl_psz_getLastSocketErrorDescription (
+    oslSocket Socket, char* pBuffer, sal_uInt32 BufferSize);
+
+static oslSocket createSocketImpl()
+{
+    oslSocket pSocket;
+
+    pSocket = static_cast<oslSocket>(calloc(1, sizeof(struct oslSocketImpl)));
+
+    pSocket->m_Socket = OSL_INVALID_SOCKET;
+    pSocket->m_nLastError = 0;
+    pSocket->m_nRefCount = 1;
+
+#if defined(CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT)
+    pSocket->m_bIsAccepting = false;
+#endif
+
+    return pSocket;
+}
+
+static void destroySocketImpl(oslSocket Socket)
+{
+    if ( Socket != nullptr)
+        free(Socket);
+}
+
+static oslSocketAddr createSocketAddr()
+{
+    oslSocketAddr pAddr = static_cast<oslSocketAddr>(rtl_allocateZeroMemory( sizeof( struct oslSocketAddrImpl )));
+    return pAddr;
+}
+
+static oslSocketAddr createSocketAddrWithFamily(
+    oslAddrFamily family, sal_Int32 port, sal_uInt32 nAddr )
+{
+    oslSocketAddr pAddr;
+
+    SAL_WARN_IF( family != osl_Socket_FamilyInet, "sal.osl", "creating socket for non-IP address family" );
+
+    pAddr = createSocketAddr();
+    switch( family )
+    {
+    case osl_Socket_FamilyInet:
+    {
+        struct sockaddr_in* pInetAddr= reinterpret_cast<sockaddr_in*>(&pAddr->m_sockaddr);
+
+        pInetAddr->sin_family = FAMILY_TO_NATIVE(osl_Socket_FamilyInet);
+        pInetAddr->sin_addr.s_addr = nAddr;
+        pInetAddr->sin_port = static_cast<sal_uInt16>(port&0xffff);
+        break;
+       }
+    default:
+        pAddr->m_sockaddr.sa_family = FAMILY_TO_NATIVE(family);
+    }
+    return pAddr;
+}
+
+static oslSocketAddr createSocketAddrFromSystem( struct sockaddr *pSystemSockAddr )
+{
+    oslSocketAddr pAddr = createSocketAddr();
+    memcpy( &(pAddr->m_sockaddr), pSystemSockAddr, sizeof( struct sockaddr ) );
+    return pAddr;
+}
+
+static void destroySocketAddr( oslSocketAddr addr )
+{
+    free( addr );
+}
+
+oslSocketAddr SAL_CALL osl_createEmptySocketAddr(oslAddrFamily Family)
+{
+    oslSocketAddr pAddr = nullptr;
+
+    /* is it an internet-Addr? */
+    if (Family == osl_Socket_FamilyInet)
+    {
+        pAddr = createSocketAddrWithFamily(Family, 0 , htonl(INADDR_ANY) );
+    }
+    else
+    {
+        pAddr = createSocketAddrWithFamily( Family , 0 , 0 );
+    }
+
+    return pAddr;
+}
+
+oslSocketAddr SAL_CALL osl_copySocketAddr(oslSocketAddr Addr)
+{
+    oslSocketAddr pCopy = nullptr;
+    if (Addr)
+    {
+        pCopy = createSocketAddr();
+
+        if (pCopy)
+            memcpy(&(pCopy->m_sockaddr),&(Addr->m_sockaddr), sizeof(struct sockaddr));
+    }
+    return pCopy;
+}
+
+sal_Bool SAL_CALL osl_isEqualSocketAddr (
+    oslSocketAddr Addr1,
+    oslSocketAddr Addr2)
+{
+    struct sockaddr* pAddr1 = nullptr;
+    struct sockaddr* pAddr2 = nullptr;
+
+    assert(Addr1 && Addr2);
+    pAddr1 = &(Addr1->m_sockaddr);
+    pAddr2 = &(Addr2->m_sockaddr);
+
+    if (pAddr1 == pAddr2)
+    {
+        return true;
+    }
+
+    if (pAddr1->sa_family == pAddr2->sa_family)
+    {
+        switch (pAddr1->sa_family)
+        {
+            case AF_INET:
+            {
+                struct sockaddr_in* pInetAddr1= reinterpret_cast<sockaddr_in*>(pAddr1);
+                struct sockaddr_in* pInetAddr2= reinterpret_cast<sockaddr_in*>(pAddr2);
+
+                if ((pInetAddr1->sin_family == pInetAddr2->sin_family) &&
+                    (pInetAddr1->sin_addr.s_addr == pInetAddr2->sin_addr.s_addr) &&
+                    (pInetAddr1->sin_port == pInetAddr2->sin_port))
+                    return true;
+                [[fallthrough]];
+            }
+
+            default:
+            {
+                return (memcmp(pAddr1, pAddr2, sizeof(struct sockaddr)) == 0);
+            }
+        }
+    }
+
+    return false;
+}
+
+oslSocketAddr SAL_CALL osl_createInetBroadcastAddr (
+    rtl_uString *strDottedAddr,
+    sal_Int32    Port)
+{
+    sal_uInt32    nAddr = OSL_INADDR_NONE;
+    oslSocketAddr pAddr;
+
+    if (strDottedAddr && strDottedAddr->length)
+    {
+        /* Dotted host address for limited broadcast */
+        rtl_String *pDottedAddr = nullptr;
+
+        rtl_uString2String (
+            &pDottedAddr, strDottedAddr->buffer, strDottedAddr->length,
+            RTL_TEXTENCODING_UTF8, OUSTRING_TO_OSTRING_CVTFLAGS);
+
+        nAddr = inet_addr (pDottedAddr->buffer);
+        rtl_string_release (pDottedAddr);
+    }
+
+    if (nAddr != OSL_INADDR_NONE)
+    {
+        /* Limited broadcast */
+        nAddr = ntohl(nAddr);
+        if (IN_CLASSA(nAddr))
+        {
+            nAddr &= IN_CLASSA_NET;
+            nAddr |= IN_CLASSA_HOST;
+        }
+        else if (IN_CLASSB(nAddr))
+        {
+            nAddr &= IN_CLASSB_NET;
+            nAddr |= IN_CLASSB_HOST;
+        }
+        else if (IN_CLASSC(nAddr))
+        {
+            nAddr &= IN_CLASSC_NET;
+            nAddr |= IN_CLASSC_HOST;
+        }
+        else
+        {
+            /* No broadcast in class D */
+            return nullptr;
+        }
+        nAddr = htonl(nAddr);
+    }
+
+    pAddr = createSocketAddrWithFamily( osl_Socket_FamilyInet, htons(Port), nAddr );
+    return pAddr;
+}
+
+oslSocketAddr SAL_CALL osl_createInetSocketAddr (
+    rtl_uString *ustrDottedAddr,
+    sal_Int32    Port)
+{
+    rtl_String* strDottedAddr=nullptr;
+    oslSocketAddr Addr;
+    char* pszDottedAddr=nullptr;
+
+    if ( ustrDottedAddr != nullptr )
+    {
+        rtl_uString2String( &strDottedAddr,
+                            rtl_uString_getStr(ustrDottedAddr),
+                            rtl_uString_getLength(ustrDottedAddr),
+                            RTL_TEXTENCODING_UTF8,
+                            OUSTRING_TO_OSTRING_CVTFLAGS);
+        pszDottedAddr = rtl_string_getStr(strDottedAddr);
+    }
+
+    Addr = pszDottedAddr ? osl_psz_createInetSocketAddr(pszDottedAddr, Port) : nullptr;
+
+    if ( strDottedAddr != nullptr )
+    {
+        rtl_string_release(strDottedAddr);
+    }
+
+    return Addr;
+}
+
+oslSocketAddr osl_psz_createInetSocketAddr (
+    const char* pszDottedAddr,
+    sal_Int32       Port)
+{
+    oslSocketAddr pAddr = nullptr;
+    sal_Int32 Addr = inet_addr(pszDottedAddr);
+    if(Addr != -1)
+    {
+        /* valid dotted addr */
+        pAddr = createSocketAddrWithFamily( osl_Socket_FamilyInet, htons(Port) , Addr );
+    }
+    return pAddr;
+}
+
+oslSocketResult SAL_CALL osl_setAddrOfSocketAddr( oslSocketAddr pAddr, sal_Sequence *pByteSeq )
+{
+    oslSocketResult res = osl_Socket_Error;
+
+    SAL_WARN_IF( !pAddr, "sal.osl", "setting address of undefined socket address" );
+    SAL_WARN_IF( !pByteSeq, "sal.osl", "setting undefined address for socket address" );
+
+    if( pAddr && pByteSeq )
+    {
+        struct sockaddr_in * pSystemInetAddr;
+
+        assert( pAddr->m_sockaddr.sa_family == FAMILY_TO_NATIVE( osl_Socket_FamilyInet ) );
+        assert( pByteSeq->nElements == 4 );
+
+        pSystemInetAddr = reinterpret_cast<sockaddr_in *>(&pAddr->m_sockaddr);
+        memcpy( &(pSystemInetAddr->sin_addr) , pByteSeq->elements , 4 );
+        res = osl_Socket_Ok;
+    }
+    return res;
+}
+
+oslSocketResult SAL_CALL osl_getAddrOfSocketAddr( oslSocketAddr pAddr, sal_Sequence **ppByteSeq )
+{
+    oslSocketResult res = osl_Socket_Error;
+
+    SAL_WARN_IF( !pAddr, "sal.osl", "getting address of undefined socket address" );
+    SAL_WARN_IF( !ppByteSeq, "sal.osl", "getting address to undefined address pointer" );
+
+    if( pAddr && ppByteSeq )
+    {
+        struct sockaddr_in * pSystemInetAddr = reinterpret_cast<sockaddr_in *>(&pAddr->m_sockaddr);
+        rtl_byte_sequence_constructFromArray( ppByteSeq, reinterpret_cast<sal_Int8 *>(&pSystemInetAddr->sin_addr), 4);
+        res = osl_Socket_Ok;
+    }
+    return res;
+}
+
+/** try to figure out a full-qualified hostname, by adding the current domain
+    as given by the domainname program to the given hostname.
+    This function MUST NOT call gethostbyname since pHostName already points
+    to data returned by gethostname and would be garbled: use gethostname_r
+    instead!
+ */
+
+namespace {
+
+struct oslAddrInfo
+{
+    addrinfo* pAddrInfoList = nullptr;
+    int nError;
+
+    oslAddrInfo(const char* name, bool isInet = false)
+    {
+        addrinfo aHints;
+        memset(&aHints, 0, sizeof(addrinfo));
+        if (isInet)
+            aHints.ai_family = AF_INET;
+        aHints.ai_flags = AI_CANONNAME;
+
+        nError = getaddrinfo(name, nullptr, &aHints, &pAddrInfoList);
+    }
+
+    ~oslAddrInfo()
+    {
+        if (nError == 0)
+            freeaddrinfo(pAddrInfoList);
+    }
+
+    const char* getHostName() const
+    {
+        assert(pAddrInfoList);
+        return pAddrInfoList->ai_canonname;
+    }
+};
+
+}
+static bool isFullQualifiedDomainName (const char *pHostName)
+{
+    /* a FQDN (aka 'hostname.domain.top_level_domain' )
+     * is a name which contains a dot '.' in it ( would
+     * match as well for 'hostname.' but is good enough
+     * for now )*/
+    return strchr( pHostName, int('.') ) != nullptr;
+}
+
+static char* getFullQualifiedDomainName (const char *pHostName)
+{
+    char  *pFullQualifiedName = nullptr;
+
+    if (isFullQualifiedDomainName(pHostName))
+    {
+        pFullQualifiedName = strdup(pHostName);
+    }
+    else
+    {
+        oslAddrInfo aAddrInfo(pHostName);
+        if (aAddrInfo.nError == 0)
+            pFullQualifiedName = strdup(aAddrInfo.getHostName());
+    }
+
+    return pFullQualifiedName;
+}
+
+struct oslHostAddrImpl
+{
+    char        *pHostName;
+    oslSocketAddr   pSockAddr;
+};
+
+static oslHostAddr addrinfoToHostAddr (const addrinfo* ai)
+{
+    if (!ai || !ai->ai_canonname || !ai->ai_addr)
+        return nullptr;
+
+    char* cn = getFullQualifiedDomainName(ai->ai_canonname);
+    SAL_WARN_IF( !cn, "sal.osl", "couldn't get full qualified domain name" );
+    if (cn == nullptr)
+        return nullptr;
+
+    oslSocketAddr pSockAddr = createSocketAddr();
+    SAL_WARN_IF( !pSockAddr, "sal.osl", "insufficient memory" );
+    if (pSockAddr == nullptr)
+    {
+        free(cn);
+        return nullptr;
+    }
+
+    if (ai->ai_family == FAMILY_TO_NATIVE(osl_Socket_FamilyInet))
+    {
+        memcpy (
+            &(pSockAddr->m_sockaddr),
+            ai->ai_addr,
+            ai->ai_addrlen);
+    }
+    else
+    {
+        /* unknown address family */
+        /* future extensions for new families might be implemented here */
+
+        SAL_WARN( "sal.osl", "unknown address family" );
+
+        destroySocketAddr( pSockAddr );
+        free (cn);
+        return nullptr;
+    }
+
+    oslHostAddr pAddr = static_cast<oslHostAddr>(malloc(sizeof(struct oslHostAddrImpl)));
+    SAL_WARN_IF( !pAddr, "sal.osl", "allocation error" );
+    if (pAddr == nullptr)
+    {
+        destroySocketAddr( pSockAddr );
+        free (cn);
+        return nullptr;
+    }
+
+    pAddr->pHostName= cn;
+    pAddr->pSockAddr= pSockAddr;
+
+    return pAddr;
+}
+
+oslHostAddr SAL_CALL osl_createHostAddr (
+    rtl_uString        *ustrHostname,
+    const oslSocketAddr Addr)
+{
+    oslHostAddr HostAddr;
+    rtl_String* strHostname=nullptr;
+    char* pszHostName=nullptr;
+
+    if ( ustrHostname != nullptr )
+    {
+        rtl_uString2String( &strHostname,
+                            rtl_uString_getStr(ustrHostname),
+                            rtl_uString_getLength(ustrHostname),
+                            RTL_TEXTENCODING_UTF8,
+                            OUSTRING_TO_OSTRING_CVTFLAGS );
+        pszHostName = rtl_string_getStr(strHostname);
+    }
+
+    HostAddr = osl_psz_createHostAddr(pszHostName,Addr);
+
+    if ( strHostname != nullptr )
+    {
+        rtl_string_release(strHostname);
+    }
+
+    return HostAddr;
+}
+
+oslHostAddr osl_psz_createHostAddr (
+    const char     *pszHostname,
+    const oslSocketAddr pAddr)
+{
+    oslHostAddr pHostAddr;
+    char            *cn;
+
+    SAL_WARN_IF( !pszHostname, "sal.osl", "undefined hostname" );
+    SAL_WARN_IF( !pAddr, "sal.osl", "undefined address" );
+    if ((pszHostname == nullptr) || (pAddr == nullptr))
+        return nullptr;
+
+    cn = strdup(pszHostname);
+    SAL_WARN_IF( !cn, "sal.osl", "insufficient memory" );
+    if (cn == nullptr)
+        return nullptr;
+
+    pHostAddr= static_cast<oslHostAddr>(malloc(sizeof(struct oslHostAddrImpl)));
+    SAL_WARN_IF( !pHostAddr, "sal.osl", "allocation error" );
+    if (pHostAddr == nullptr)
+    {
+        free (cn);
+        return nullptr;
+    }
+
+    pHostAddr->pHostName= cn;
+    pHostAddr->pSockAddr= osl_copySocketAddr( pAddr );
+
+    return pHostAddr;
+}
+
+oslHostAddr SAL_CALL osl_createHostAddrByName(rtl_uString *ustrHostname)
+{
+    oslHostAddr HostAddr;
+    rtl_String* strHostname=nullptr;
+    char* pszHostName=nullptr;
+
+    if ( ustrHostname != nullptr )
+    {
+        rtl_uString2String( &strHostname,
+                            rtl_uString_getStr(ustrHostname),
+                            rtl_uString_getLength(ustrHostname),
+                            RTL_TEXTENCODING_UTF8,
+                            OUSTRING_TO_OSTRING_CVTFLAGS );
+        pszHostName=rtl_string_getStr(strHostname);
+    }
+
+    HostAddr = osl_psz_createHostAddrByName(pszHostName);
+
+    if ( strHostname != nullptr )
+    {
+        rtl_string_release(strHostname);
+    }
+
+    return HostAddr;
+}
+
+oslHostAddr osl_psz_createHostAddrByName (const char *pszHostname)
+{
+    oslAddrInfo aAddrInfo(pszHostname, /* isInet */ true);
+
+    return addrinfoToHostAddr (aAddrInfo.pAddrInfoList);
+}
+
+oslHostAddr SAL_CALL osl_createHostAddrByAddr (const oslSocketAddr pAddr)
+{
+    SAL_WARN_IF( !pAddr, "sal.osl", "undefined address" );
+
+    if (pAddr == nullptr)
+        return nullptr;
+
+    if (pAddr->m_sockaddr.sa_family == FAMILY_TO_NATIVE(osl_Socket_FamilyInet))
+    {
+        const struct sockaddr_in *sin = reinterpret_cast<sockaddr_in *>(&pAddr->m_sockaddr);
+        if (sin->sin_addr.s_addr == htonl(INADDR_ANY))
+            return nullptr;
+
+        char host[MAX_HOSTBUFFER_SIZE];
+        int res = getnameinfo(&pAddr->m_sockaddr, sizeof(struct sockaddr_in),
+                              host, sizeof(host), nullptr, 0, NI_NAMEREQD);
+        if (res != 0)
+            return nullptr;
+
+        char *cn = getFullQualifiedDomainName(host);
+        SAL_WARN_IF( !cn, "sal.osl", "couldn't get full qualified domain name" );
+        if (cn == nullptr)
+            return nullptr;
+
+        oslSocketAddr pSockAddr = createSocketAddr();
+        SAL_WARN_IF( !pSockAddr, "sal.osl", "insufficient memory" );
+        if (pSockAddr == nullptr)
+        {
+            free(cn);
+            return nullptr;
+        }
+
+        memcpy(&pSockAddr->m_sockaddr, &pAddr->m_sockaddr, sizeof(pAddr->m_sockaddr));
+
+        oslHostAddr pHostAddr = static_cast<oslHostAddr>(malloc(sizeof(struct oslHostAddrImpl)));
+        SAL_WARN_IF( !pAddr, "sal.osl", "allocation error" );
+        if (pHostAddr == nullptr)
+        {
+            destroySocketAddr(pSockAddr);
+            free(cn);
+            return nullptr;
+        }
+
+        pHostAddr->pHostName = cn;
+        pHostAddr->pSockAddr = pSockAddr;
+
+        return pHostAddr;
+    }
+
+    return nullptr;
+}
+
+oslHostAddr SAL_CALL osl_copyHostAddr (const oslHostAddr pAddr)
+{
+    SAL_WARN_IF( !pAddr, "sal.osl", "undefined address" );
+
+    if (pAddr)
+        return osl_psz_createHostAddr (pAddr->pHostName, pAddr->pSockAddr);
+    return nullptr;
+}
+
+void SAL_CALL osl_getHostnameOfHostAddr (
+    const oslHostAddr   Addr,
+    rtl_uString       **ustrHostname)
+{
+    const char* pHostname = osl_psz_getHostnameOfHostAddr(Addr);
+
+    rtl_uString_newFromAscii (ustrHostname, pHostname);
+}
+
+const char* osl_psz_getHostnameOfHostAddr (const oslHostAddr pAddr)
+{
+    if (pAddr)
+        return pAddr->pHostName;
+    return nullptr;
+}
+
+oslSocketAddr SAL_CALL osl_getSocketAddrOfHostAddr (const oslHostAddr pAddr)
+{
+    SAL_WARN_IF( !pAddr, "sal.osl", "undefined address" );
+
+    if (pAddr)
+        return pAddr->pSockAddr;
+    return nullptr;
+}
+
+void SAL_CALL osl_destroyHostAddr (oslHostAddr pAddr)
+{
+    if (pAddr)
+    {
+        if (pAddr->pHostName)
+            free (pAddr->pHostName);
+        if (pAddr->pSockAddr)
+            osl_destroySocketAddr (pAddr->pSockAddr);
+        free (pAddr);
+    }
+}
+
+oslSocketResult SAL_CALL osl_getLocalHostname(rtl_uString **ustrLocalHostname)
+{
+    static auto const init = []() -> std::pair<oslSocketResult, OUString> {
+            char LocalHostname[256] = "";
+
+#ifdef SYSV
+            struct utsname uts;
+
+            if (uname(&uts) < 0)
+                return {osl_Socket_Error, OUString()};
+
+            if ((strlen(uts.nodename) + 1) > nBufLen)
+                return {osl_Socket_Error, OUString()};
+
+            strncpy(LocalHostname, uts.nodename, sizeof( LocalHostname ));
+#else  /* BSD compatible */
+            if (gethostname(LocalHostname, sizeof(LocalHostname)-1) != 0)
+                return {osl_Socket_Error, OUString()};
+#endif /* SYSV */
+            LocalHostname[sizeof(LocalHostname)-1] = 0;
+
+            /* check if we have an FQDN */
+            if (strchr(LocalHostname, '.') == nullptr)
+            {
+                oslHostAddr Addr;
+
+                /* no, determine it via dns */
+                Addr = osl_psz_createHostAddrByName(LocalHostname);
+
+                const char *pStr;
+                if ((pStr = osl_psz_getHostnameOfHostAddr(Addr)) != nullptr)
+                {
+                    strncpy(LocalHostname, pStr, sizeof( LocalHostname ));
+                    LocalHostname[sizeof(LocalHostname)-1] = 0;
+                }
+                osl_destroyHostAddr(Addr);
+            }
+
+            if (LocalHostname[0] != '\0')
+            {
+                return {osl_Socket_Ok, OUString::createFromAscii(LocalHostname)};
+            }
+
+            return {osl_Socket_Error, OUString()};
+        }();
+
+    rtl_uString_assign(ustrLocalHostname,init.second.pData);
+
+    return init.first;
+}
+
+oslSocketAddr SAL_CALL osl_resolveHostname(rtl_uString *ustrHostname)
+{
+    oslSocketAddr Addr;
+    rtl_String* strHostname=nullptr;
+    char* pszHostName=nullptr;
+
+    if ( ustrHostname != nullptr )
+    {
+        rtl_uString2String( &strHostname,
+                            rtl_uString_getStr(ustrHostname),
+                            rtl_uString_getLength(ustrHostname),
+                            RTL_TEXTENCODING_UTF8,
+                            OUSTRING_TO_OSTRING_CVTFLAGS );
+        pszHostName = rtl_string_getStr(strHostname);
+    }
+
+    Addr = osl_psz_resolveHostname(pszHostName);
+
+    if ( strHostname != nullptr )
+    {
+        rtl_string_release(strHostname);
+    }
+
+    return Addr;
+}
+
+oslSocketAddr osl_psz_resolveHostname(const char* pszHostname)
+{
+    struct oslHostAddrImpl *pAddr = osl_psz_createHostAddrByName(pszHostname);
+
+    if (pAddr)
+    {
+        oslSocketAddr SockAddr = osl_copySocketAddr(pAddr->pSockAddr);
+
+        osl_destroyHostAddr(pAddr);
+
+        return SockAddr;
+    }
+
+    return nullptr;
+}
+
+sal_Int32 SAL_CALL osl_getServicePort(rtl_uString *ustrServicename, rtl_uString *ustrProtocol)
+{
+    sal_Int32 nPort;
+    rtl_String* strServicename=nullptr;
+    rtl_String* strProtocol=nullptr;
+    char* pszServiceName=nullptr;
+    char* pszProtocol=nullptr;
+
+    if ( ustrServicename != nullptr )
+    {
+        rtl_uString2String( &strServicename,
+                            rtl_uString_getStr(ustrServicename),
+                            rtl_uString_getLength(ustrServicename),
+                            RTL_TEXTENCODING_UTF8,
+                            OUSTRING_TO_OSTRING_CVTFLAGS );
+        pszServiceName = rtl_string_getStr(strServicename);
+    }
+
+    if ( ustrProtocol != nullptr )
+    {
+        rtl_uString2String( &strProtocol,
+                            rtl_uString_getStr(ustrProtocol),
+                            rtl_uString_getLength(ustrProtocol),
+                            RTL_TEXTENCODING_UTF8,
+                            OUSTRING_TO_OSTRING_CVTFLAGS );
+        pszProtocol = rtl_string_getStr(strProtocol);
+    }
+
+    nPort = osl_psz_getServicePort(pszServiceName,pszProtocol);
+
+    if ( strServicename != nullptr )
+    {
+        rtl_string_release(strServicename);
+    }
+
+    if ( strProtocol != nullptr )
+    {
+        rtl_string_release(strProtocol);
+    }
+
+    return nPort;
+}
+
+sal_Int32 osl_psz_getServicePort(const char* pszServicename,
+                        const char* pszProtocol)
+{
+    struct servent* ps;
+
+    ps= getservbyname(pszServicename, pszProtocol);
+
+    if (ps != nullptr)
+        return ntohs(ps->s_port);
+
+    return OSL_INVALID_PORT;
+}
+
+void SAL_CALL osl_destroySocketAddr(oslSocketAddr pAddr)
+{
+    destroySocketAddr( pAddr );
+}
+
+oslAddrFamily SAL_CALL osl_getFamilyOfSocketAddr(oslSocketAddr pAddr)
+{
+    SAL_WARN_IF( !pAddr, "sal.osl", "undefined address" );
+
+    if (pAddr)
+        return FAMILY_FROM_NATIVE(pAddr->m_sockaddr.sa_family);
+    return osl_Socket_FamilyInvalid;
+}
+
+sal_Int32 SAL_CALL osl_getInetPortOfSocketAddr(oslSocketAddr pAddr)
+{
+    SAL_WARN_IF( !pAddr, "sal.osl", "undefined address" );
+
+    if( pAddr )
+    {
+        struct sockaddr_in* pSystemInetAddr= reinterpret_cast<sockaddr_in*>(&pAddr->m_sockaddr);
+
+        if ( pSystemInetAddr->sin_family == FAMILY_TO_NATIVE(osl_Socket_FamilyInet))
+            return ntohs(pSystemInetAddr->sin_port);
+    }
+    return OSL_INVALID_PORT;
+}
+
+sal_Bool SAL_CALL osl_setInetPortOfSocketAddr(oslSocketAddr pAddr, sal_Int32 Port)
+{
+    SAL_WARN_IF( !pAddr, "sal.osl", "undefined address" );
+
+    if( pAddr )
+    {
+        struct sockaddr_in* pSystemInetAddr= reinterpret_cast<sockaddr_in*>(&pAddr->m_sockaddr);
+        if ( pSystemInetAddr->sin_family == FAMILY_TO_NATIVE(osl_Socket_FamilyInet))
+        {
+            pSystemInetAddr->sin_port= htons(static_cast<short>(Port));
+            return true;
+        }
+    }
+
+    /* this is not a inet-addr => can't set port */
+    return false;
+}
+
+oslSocketResult SAL_CALL osl_getHostnameOfSocketAddr(oslSocketAddr Addr, rtl_uString **ustrHostname)
+{
+    oslHostAddr pHostAddr= osl_createHostAddrByAddr(Addr);
+
+    if (!pHostAddr)
+    {
+        return osl_Socket_Error;
+    }
+
+    rtl_uString_newFromAscii(ustrHostname,pHostAddr->pHostName);
+
+    osl_destroyHostAddr(pHostAddr);
+
+    return osl_Socket_Ok;
+}
+
+oslSocketResult SAL_CALL osl_getDottedInetAddrOfSocketAddr(oslSocketAddr Addr, rtl_uString **ustrDottedInetAddr)
+{
+    if( !Addr )
+    {
+        return osl_Socket_Error;
+    }
+
+    struct sockaddr_in* pSystemInetAddr = reinterpret_cast<sockaddr_in *>(&Addr->m_sockaddr);
+
+    if (pSystemInetAddr->sin_family != FAMILY_TO_NATIVE(osl_Socket_FamilyInet))
+    {
+        return osl_Socket_Error;
+    }
+
+    rtl_uString_newFromAscii(ustrDottedInetAddr,inet_ntoa(pSystemInetAddr->sin_addr));
+
+    return osl_Socket_Ok;
+
+}
+
+oslSocket SAL_CALL osl_createSocket(
+    oslAddrFamily Family,
+    oslSocketType Type,
+    oslProtocol Protocol)
+{
+    oslSocket pSocket;
+
+    /* alloc memory */
+    pSocket= createSocketImpl();
+
+    /* create socket */
+    pSocket->m_Socket= socket(FAMILY_TO_NATIVE(Family),
+                                TYPE_TO_NATIVE(Type),
+                                PROTOCOL_TO_NATIVE(Protocol));
+
+    /* creation failed => free memory */
+    if(pSocket->m_Socket == OSL_INVALID_SOCKET)
+    {
+        int nErrno = errno;
+        SAL_WARN( "sal.osl", "socket creation failed: " << UnixErrnoString(nErrno) );
+
+        destroySocketImpl(pSocket);
+        pSocket= nullptr;
+    }
+    else
+    {
+        sal_Int32 nFlags=0;
+        /* set close-on-exec flag */
+        if ((nFlags = fcntl(pSocket->m_Socket, F_GETFD, 0)) != -1)
+        {
+            nFlags |= FD_CLOEXEC;
+            if (fcntl(pSocket->m_Socket, F_SETFD, nFlags) == -1)
+            {
+                pSocket->m_nLastError=errno;
+                int nErrno = errno;
+                SAL_WARN( "sal.osl", "failed changing socket flags: " << UnixErrnoString(nErrno) );
+            }
+        }
+        else
+        {
+            pSocket->m_nLastError=errno;
+        }
+    }
+
+    return pSocket;
+}
+
+void SAL_CALL osl_acquireSocket(oslSocket pSocket)
+{
+    osl_atomic_increment(&(pSocket->m_nRefCount));
+}
+
+void SAL_CALL osl_releaseSocket(oslSocket pSocket)
+{
+    if (pSocket && osl_atomic_decrement(&(pSocket->m_nRefCount)) == 0)
+    {
+#if defined(CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT)
+        if (pSocket->m_bIsAccepting)
+        {
+            SAL_WARN( "sal.osl", "attempt to destroy socket while accepting" );
+            return;
+        }
+#endif /* CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT */
+        osl_closeSocket(pSocket);
+        destroySocketImpl(pSocket);
+    }
+}
+
+void SAL_CALL osl_closeSocket(oslSocket pSocket)
+{
+    /* socket already invalid */
+    if (!pSocket)
+        return;
+
+    pSocket->m_nLastError=0;
+    sal_Int32 nFD = pSocket->m_Socket;
+
+    if (nFD == OSL_INVALID_SOCKET)
+        return;
+
+    pSocket->m_Socket = OSL_INVALID_SOCKET;
+
+    sal_Int32 nRet=0;
+#if defined(CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT)
+    pSocket->m_bIsInShutdown = true;
+
+    if (pSocket->m_bIsAccepting)
+    {
+        union {
+            struct sockaddr aSockAddr;
+            struct sockaddr_in aSockAddrIn;
+        } s;
+        socklen_t nSockLen = sizeof(s.aSockAddr);
+
+        nRet = getsockname(nFD, &s.aSockAddr, &nSockLen);
+        if (nRet < 0)
+        {
+            int nErrno = errno;
+            SAL_WARN( "sal.osl", "getsockname call failed: " << UnixErrnoString(nErrno) );
+        }
+
+        if (s.aSockAddr.sa_family == AF_INET)
+        {
+            if (s.aSockAddrIn.sin_addr.s_addr == htonl(INADDR_ANY))
+            {
+                s.aSockAddrIn.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+            }
+
+            int nConnFD = socket(AF_INET, SOCK_STREAM, 0);
+            if (nConnFD < 0)
+            {
+                int nErrno = errno;
+                SAL_WARN( "sal.osl", "socket call failed: " << UnixErrnoString(nErrno) );
+            }
+            else
+            {
+                nRet = connect(nConnFD, &s.aSockAddr, sizeof(s.aSockAddr));
+                if (nRet < 0)
+                {
+                    int nErrno = errno;
+                    SAL_WARN( "sal.osl", "connect call failed: " << UnixErrnoString(nErrno) );
+                }
+                close(nConnFD);
+            }
+        }
+        pSocket->m_bIsAccepting = false;
+    }
+#endif /* CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT */
+
+    nRet=close(nFD);
+    if (nRet != 0)
+    {
+        pSocket->m_nLastError=errno;
+        int nErrno = errno;
+        SAL_WARN( "sal.osl", "closeSocket close failed: " << UnixErrnoString(nErrno) );
+    }
+
+    pSocket->m_Socket = OSL_INVALID_SOCKET;
+}
+
+/* Note from function creator: I rely on the fact that oslSocketAddr and struct sockaddr
+   are the same! I don't like it very much but see no other easy way to conceal
+   the struct sockaddr from the eyes of the user. */
+oslSocketAddr SAL_CALL osl_getLocalAddrOfSocket(oslSocket pSocket)
+{
+    socklen_t AddrLen;
+    struct sockaddr Addr;
+    oslSocketAddr  pAddr;
+
+    if (pSocket == nullptr) /* ENOTSOCK */
+        return nullptr;
+
+    AddrLen= sizeof(struct sockaddr);
+
+    if (getsockname(pSocket->m_Socket, &Addr, &AddrLen) == OSL_SOCKET_ERROR)
+        return nullptr;
+
+    pAddr = createSocketAddrFromSystem( &Addr );
+    return pAddr;
+}
+
+oslSocketAddr SAL_CALL osl_getPeerAddrOfSocket(oslSocket pSocket)
+{
+    socklen_t AddrLen;
+    struct sockaddr Addr;
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if ( pSocket == nullptr )
+    {
+        return nullptr;
+    }
+
+    pSocket->m_nLastError=0;
+    AddrLen= sizeof(struct sockaddr);
+
+    if(getpeername(pSocket->m_Socket, &Addr, &AddrLen) == OSL_SOCKET_ERROR)
+    {
+        pSocket->m_nLastError=errno;
+        return nullptr;
+    }
+    return createSocketAddrFromSystem( &Addr );
+}
+
+sal_Bool SAL_CALL osl_bindAddrToSocket(oslSocket pSocket,
+                             oslSocketAddr pAddr)
+{
+    int nRet;
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    SAL_WARN_IF( !pAddr, "sal.osl", "undefined address" );
+    if ( pSocket == nullptr || pAddr == nullptr )
+    {
+        return false;
+    }
+
+    pSocket->m_nLastError=0;
+
+    nRet = bind(pSocket->m_Socket, &(pAddr->m_sockaddr), sizeof(struct sockaddr));
+
+    if ( nRet == OSL_SOCKET_ERROR)
+    {
+        pSocket->m_nLastError=errno;
+        return false;
+    }
+
+    return true;
+}
+
+sal_Bool SAL_CALL osl_listenOnSocket(oslSocket pSocket,
+                           sal_Int32 MaxPendingConnections)
+{
+    int nRet;
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if ( pSocket == nullptr )
+    {
+        return false;
+    }
+
+    pSocket->m_nLastError=0;
+
+    nRet = listen(pSocket->m_Socket,
+                  MaxPendingConnections == -1 ?
+                  SOMAXCONN :
+                  MaxPendingConnections);
+    if ( nRet == OSL_SOCKET_ERROR)
+    {
+        pSocket->m_nLastError=errno;
+        return false;
+    }
+
+    return true;
+}
+
+oslSocketResult SAL_CALL osl_connectSocketTo(oslSocket pSocket,
+                                    oslSocketAddr pAddr,
+                                    const TimeValue* pTimeout)
+{
+    fd_set   WriteSet;
+    fd_set   ExcptSet;
+    int      ReadyHandles;
+    struct timeval  tv;
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+
+    if ( pSocket == nullptr )
+    {
+        return osl_Socket_Error;
+    }
+
+    pSocket->m_nLastError=0;
+
+    if (osl_isNonBlockingMode(pSocket))
+    {
+        if (connect(pSocket->m_Socket,
+                    &(pAddr->m_sockaddr),
+                    sizeof(struct sockaddr)) != OSL_SOCKET_ERROR)
+            return osl_Socket_Ok;
+
+        if (errno == EWOULDBLOCK || errno == EINPROGRESS)
+        {
+            pSocket->m_nLastError=EINPROGRESS;
+            return osl_Socket_InProgress;
+        }
+
+        pSocket->m_nLastError=errno;
+        int nErrno = errno;
+        SAL_WARN( "sal.osl", "connection failed: " << UnixErrnoString(nErrno) );
+        return osl_Socket_Error;
+    }
+
+    /* set socket temporarily to non-blocking */
+    if( !osl_enableNonBlockingMode(pSocket, true) )
+        SAL_WARN( "sal.osl", "failed to enable non-blocking mode" );
+
+    /* initiate connect */
+    if(connect(pSocket->m_Socket,
+               &(pAddr->m_sockaddr),
+               sizeof(struct sockaddr)) != OSL_SOCKET_ERROR)
+    {
+       /* immediate connection */
+        osl_enableNonBlockingMode(pSocket, false);
+
+        return osl_Socket_Ok;
+    }
+
+    /* really an error or just delayed? */
+    if (errno != EINPROGRESS)
+    {
+        pSocket->m_nLastError=errno;
+        int nErrno = errno;
+        SAL_WARN( "sal.osl", "connection failed: " << UnixErrnoString(nErrno) );
+
+        osl_enableNonBlockingMode(pSocket, false);
+        return osl_Socket_Error;
+    }
+
+    /* prepare select set for socket  */
+    FD_ZERO(&WriteSet);
+    FD_ZERO(&ExcptSet);
+    FD_SET(pSocket->m_Socket, &WriteSet);
+    FD_SET(pSocket->m_Socket, &ExcptSet);
+
+    /* prepare timeout */
+    if (pTimeout)
+    {
+        /* divide milliseconds into seconds and microseconds */
+        tv.tv_sec=  pTimeout->Seconds;
+        tv.tv_usec= pTimeout->Nanosec / 1000;
+    }
+
+    /* select */
+    ReadyHandles= select(pSocket->m_Socket+1,
+                         nullptr,
+                         PTR_FD_SET(WriteSet),
+                         PTR_FD_SET(ExcptSet),
+                         pTimeout ? &tv : nullptr);
+
+    if (ReadyHandles > 0)  /* connected */
+    {
+        if ( FD_ISSET(pSocket->m_Socket, &WriteSet ) )
+        {
+            int nErrorCode = 0;
+            socklen_t nErrorSize = sizeof( nErrorCode );
+
+            int nSockOpt;
+
+            nSockOpt = getsockopt ( pSocket->m_Socket, SOL_SOCKET, SO_ERROR,
+                                    &nErrorCode, &nErrorSize );
+            if ( (nSockOpt == 0) && (nErrorCode == 0))
+            {
+                osl_enableNonBlockingMode(pSocket, false);
+                return osl_Socket_Ok;
+            }
+            else
+            {
+                pSocket->m_nLastError = (nSockOpt == 0) ? nErrorCode : errno;
+                return osl_Socket_Error;
+            }
+        }
+        else
+        {
+            return osl_Socket_Error;
+        }
+    }
+    else if (ReadyHandles < 0)  /* error */
+    {
+        if (errno == EBADF) /* most probably interrupted by close() */
+        {
+            /* do not access pSockImpl because it is about to be or */
+            /* already destroyed */
+            return osl_Socket_Interrupted;
+        }
+        pSocket->m_nLastError=errno;
+        return osl_Socket_Error;
+    }
+    else    /* timeout */
+    {
+        pSocket->m_nLastError=errno;
+        return osl_Socket_TimedOut;
+    }
+}
+
+oslSocket SAL_CALL osl_acceptConnectionOnSocket(oslSocket pSocket,
+                        oslSocketAddr* ppAddr)
+{
+    struct sockaddr Addr;
+    int Connection, Flags;
+    oslSocket pConnectionSockImpl;
+
+    socklen_t AddrLen = sizeof(struct sockaddr);
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if ( pSocket == nullptr )
+    {
+        return nullptr;
+    }
+
+    pSocket->m_nLastError=0;
+#if defined(CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT)
+    pSocket->m_bIsAccepting = true;
+#endif /* CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT */
+
+    if( ppAddr && *ppAddr )
+    {
+        osl_destroySocketAddr( *ppAddr );
+        *ppAddr = nullptr;
+    }
+
+    /* prevent Linux EINTR behaviour */
+    do
+    {
+        Connection = accept(pSocket->m_Socket, &Addr, &AddrLen);
+    } while (Connection == -1 && errno == EINTR);
+
+    /* accept failed? */
+    if( Connection == OSL_SOCKET_ERROR )
+    {
+        pSocket->m_nLastError=errno;
+        int nErrno = errno;
+        SAL_WARN( "sal.osl", "accept connection failed: " << UnixErrnoString(nErrno) );
+
+#if defined(CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT)
+        pSocket->m_bIsAccepting = false;
+#endif /* CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT */
+        return nullptr;
+    }
+
+    assert(AddrLen == sizeof(struct sockaddr));
+
+#if defined(CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT)
+    if ( pSocket->m_bIsInShutdown )
+    {
+        close(Connection);
+        SAL_WARN( "sal.osl", "close while accept" );
+        return nullptr;
+    }
+#endif /* CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT */
+
+    if(ppAddr)
+    {
+        *ppAddr= createSocketAddrFromSystem(&Addr);
+    }
+
+    /* alloc memory */
+    pConnectionSockImpl= createSocketImpl();
+
+    /* set close-on-exec flag */
+    if ((Flags = fcntl(Connection, F_GETFD, 0)) != -1)
+    {
+        Flags |= FD_CLOEXEC;
+        if (fcntl(Connection, F_SETFD, Flags) == -1)
+        {
+            pSocket->m_nLastError=errno;
+            int nErrno = errno;
+            SAL_WARN( "sal.osl", "fcntl failed: " << UnixErrnoString(nErrno) );
+        }
+
+    }
+
+    pConnectionSockImpl->m_Socket           = Connection;
+    pConnectionSockImpl->m_nLastError       = 0;
+#if defined(CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT)
+    pConnectionSockImpl->m_bIsAccepting     = false;
+
+    pSocket->m_bIsAccepting = false;
+#endif /* CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT */
+    return pConnectionSockImpl;
+}
+
+sal_Int32 SAL_CALL osl_receiveSocket(oslSocket pSocket,
+                          void* pBuffer,
+                          sal_uInt32 BytesToRead,
+                          oslSocketMsgFlag Flag)
+{
+    int nRead;
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if ( pSocket == nullptr )
+    {
+        return -1;
+    }
+
+    pSocket->m_nLastError=0;
+
+    do
+    {
+        nRead =  recv(pSocket->m_Socket,
+                      pBuffer,
+                      BytesToRead,
+                      MSG_FLAG_TO_NATIVE(Flag));
+    } while ( nRead < 0 && errno == EINTR );
+
+    if ( nRead < 0 )
+    {
+        pSocket->m_nLastError=errno;
+        int nErrno = errno;
+        SAL_WARN( "sal.osl", "receive socket [" << nRead << "] failed: " << UnixErrnoString(nErrno) );
+    }
+    else if ( nRead == 0 )
+    {
+        SAL_WARN( "sal.osl", "receive socket [" << nRead << "] failed: EOL" );
+    }
+
+    return nRead;
+}
+
+sal_Int32 SAL_CALL osl_receiveFromSocket(oslSocket pSocket,
+                              oslSocketAddr pSenderAddr,
+                              void* pBuffer,
+                              sal_uInt32 BufferSize,
+                              oslSocketMsgFlag Flag)
+{
+    int nRead;
+    struct sockaddr *pSystemSockAddr = nullptr;
+    socklen_t AddrLen = 0;
+    if( pSenderAddr )
+    {
+        AddrLen = sizeof( struct sockaddr );
+        pSystemSockAddr = &(pSenderAddr->m_sockaddr);
+    }
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if ( pSocket == nullptr )
+    {
+        return -1;
+    }
+
+    pSocket->m_nLastError=0;
+
+    nRead = recvfrom(pSocket->m_Socket,
+                     pBuffer,
+                     BufferSize,
+                     MSG_FLAG_TO_NATIVE(Flag),
+                     pSystemSockAddr,
+                     &AddrLen);
+
+    if ( nRead < 0 )
+    {
+        pSocket->m_nLastError=errno;
+        int nErrno = errno;
+        SAL_WARN( "sal.osl", "receive socket [" << nRead << "] failed: " << UnixErrnoString(nErrno) );
+    }
+    else if ( nRead == 0 )
+    {
+        SAL_WARN( "sal.osl", "receive socket [" << nRead << "] failed: EOL" );
+    }
+
+    return nRead;
+}
+
+sal_Int32 SAL_CALL osl_sendSocket(oslSocket pSocket,
+                       const void* pBuffer,
+                       sal_uInt32 BytesToSend,
+                       oslSocketMsgFlag Flag)
+{
+    int nWritten;
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if ( pSocket == nullptr )
+    {
+        return -1;
+    }
+
+    pSocket->m_nLastError=0;
+
+    do
+    {
+        nWritten = send(pSocket->m_Socket,
+                        pBuffer,
+                        BytesToSend,
+                        MSG_FLAG_TO_NATIVE(Flag));
+    } while ( nWritten < 0 && errno == EINTR );
+
+    if ( nWritten < 0 )
+    {
+        pSocket->m_nLastError=errno;
+        int nErrno = errno;
+        SAL_WARN( "sal.osl", "send socket [" << nWritten << "] failed: " << UnixErrnoString(nErrno) );
+    }
+    else if ( nWritten == 0 )
+    {
+        SAL_WARN( "sal.osl", "send socket [" << nWritten << "] failed: EOL" );
+    }
+
+    return nWritten;
+}
+
+sal_Int32 SAL_CALL osl_sendToSocket(oslSocket pSocket,
+                         oslSocketAddr ReceiverAddr,
+                         const void* pBuffer,
+                         sal_uInt32 BytesToSend,
+                         oslSocketMsgFlag Flag)
+{
+    int nWritten;
+
+    struct sockaddr *pSystemSockAddr = nullptr;
+    int AddrLen = 0;
+    if( ReceiverAddr )
+    {
+        pSystemSockAddr = &(ReceiverAddr->m_sockaddr);
+        AddrLen = sizeof( struct sockaddr );
+    }
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if ( pSocket == nullptr )
+    {
+        return -1;
+    }
+
+    pSocket->m_nLastError=0;
+
+    /* ReceiverAddr might be 0 when used on a connected socket. */
+    /* Then sendto should behave like send. */
+
+    nWritten = sendto(pSocket->m_Socket,
+                      pBuffer,
+                      BytesToSend,
+                      MSG_FLAG_TO_NATIVE(Flag),
+                      pSystemSockAddr,
+                      AddrLen);
+
+    if ( nWritten < 0 )
+    {
+        pSocket->m_nLastError=errno;
+        int nErrno = errno;
+        SAL_WARN( "sal.osl", "send socket [" << nWritten << "] failed: " << UnixErrnoString(nErrno) );
+    }
+    else if ( nWritten == 0 )
+    {
+        SAL_WARN( "sal.osl", "send socket [" << nWritten << "] failed: EOL" );
+    }
+
+    return nWritten;
+}
+
+sal_Int32 SAL_CALL osl_readSocket (
+    oslSocket pSocket, void *pBuffer, sal_Int32 n )
+{
+    sal_uInt8 * Ptr = static_cast<sal_uInt8 *>(pBuffer);
+    sal_uInt32 BytesRead= 0;
+    sal_uInt32 BytesToRead= n;
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+
+    /* loop until all desired bytes were read or an error occurred */
+    while (BytesToRead > 0)
+    {
+        sal_Int32 RetVal;
+        RetVal= osl_receiveSocket(pSocket,
+                                   Ptr,
+                                   BytesToRead,
+                                   osl_Socket_MsgNormal);
+
+        /* error occurred? */
+        if(RetVal <= 0)
+        {
+            break;
+        }
+
+        BytesToRead -= RetVal;
+        BytesRead += RetVal;
+        Ptr += RetVal;
+    }
+
+    return BytesRead;
+}
+
+sal_Int32 SAL_CALL osl_writeSocket(
+    oslSocket pSocket, const void *pBuffer, sal_Int32 n )
+{
+    /* loop until all desired bytes were send or an error occurred */
+    sal_uInt32 BytesSend= 0;
+    sal_uInt32 BytesToSend= n;
+    sal_uInt8 const *Ptr = static_cast<sal_uInt8 const *>(pBuffer);
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+
+    while (BytesToSend > 0)
+    {
+        sal_Int32 RetVal;
+
+        RetVal= osl_sendSocket( pSocket,Ptr,BytesToSend,osl_Socket_MsgNormal);
+
+        /* error occurred? */
+        if(RetVal <= 0)
+        {
+            break;
+        }
+
+        BytesToSend -= RetVal;
+        BytesSend += RetVal;
+        Ptr += RetVal;
+
+    }
+    return BytesSend;
+}
+
+#ifdef HAVE_POLL_H /* poll() */
+
+static bool socket_poll (
+    oslSocket        pSocket,
+    const TimeValue* pTimeout,
+    short            nEvent)
+{
+    struct pollfd fds;
+    int           timeout;
+    int           result;
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if (pSocket == nullptr)
+      return false; /* EINVAL */
+
+    pSocket->m_nLastError = 0;
+
+    fds.fd      = pSocket->m_Socket;
+    fds.events  = nEvent;
+    fds.revents = 0;
+
+    timeout = -1;
+    if (pTimeout)
+    {
+        /* Convert to [ms] */
+        timeout  = pTimeout->Seconds * 1000;
+        timeout += pTimeout->Nanosec / (1000 * 1000);
+    }
+
+    result = poll (&fds, 1, timeout);
+    if (result < 0)
+    {
+        pSocket->m_nLastError = errno;
+        int nErrno = errno;
+        SAL_WARN( "sal.osl", "poll failed: " << UnixErrnoString(nErrno) );
+        return false;
+    }
+    if (result == 0)
+    {
+        /* Timeout */
+        return false;
+    }
+
+    return ((fds.revents & nEvent) == nEvent);
+}
+
+#else  /* select() */
+
+static sal_Bool socket_poll (
+    oslSocket        pSocket,
+    const TimeValue* pTimeout,
+    short            nEvent)
+{
+    fd_set         fds;
+    struct timeval tv;
+    int            result;
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if (0 == pSocket)
+      return sal_False; /* EINVAL */
+
+    pSocket->m_nLastError = 0;
+
+    FD_ZERO(&fds);
+    FD_SET(pSocket->m_Socket, &fds);
+
+    if (pTimeout)
+    {
+        /* Convert to 'timeval' */
+        tv.tv_sec  = pTimeout->Seconds;
+        tv.tv_usec = pTimeout->Nanosec / 1000;
+    }
+
+    result = select (
+        pSocket->m_Socket + 1,
+        (nEvent == POLLIN ) ? PTR_FD_SET(fds) : NULL,
+        (nEvent == POLLOUT) ? PTR_FD_SET(fds) : NULL,
+        (nEvent == POLLPRI) ? PTR_FD_SET(fds) : NULL,
+        (pTimeout)          ? &tv             : NULL);
+
+    if (result < 0)
+    {
+        pSocket->m_nLastError = errno;
+        int nErrno = errno;
+        SAL_WARN( "sal.osl", "select failed: " << UnixErrnoString(nErrno) );
+        return sal_False;
+    }
+    if (result == 0)
+    {
+        /* Timeout */
+        return sal_False;
+    }
+
+    return (FD_ISSET(pSocket->m_Socket, &fds) ? sal_True : sal_False);
+}
+
+#endif /* HAVE_POLL_H */
+
+sal_Bool SAL_CALL osl_isReceiveReady (
+    oslSocket pSocket, const TimeValue* pTimeout)
+{
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if (pSocket == nullptr)
+    {
+        /* ENOTSOCK */
+        return false;
+    }
+
+    return socket_poll (pSocket, pTimeout, POLLIN);
+}
+
+sal_Bool SAL_CALL osl_isSendReady (
+    oslSocket pSocket, const TimeValue* pTimeout)
+{
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if (pSocket == nullptr)
+    {
+        /* ENOTSOCK */
+        return false;
+    }
+
+    return socket_poll (pSocket, pTimeout, POLLOUT);
+}
+
+sal_Bool SAL_CALL osl_isExceptionPending (
+    oslSocket pSocket, const TimeValue* pTimeout)
+{
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if (pSocket == nullptr)
+    {
+        /* ENOTSOCK */
+        return false;
+    }
+
+    return socket_poll (pSocket, pTimeout, POLLPRI);
+}
+
+sal_Bool SAL_CALL osl_shutdownSocket(oslSocket pSocket,
+                           oslSocketDirection Direction)
+{
+    int nRet;
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if ( pSocket == nullptr )
+    {
+        return false;
+    }
+
+    pSocket->m_nLastError=0;
+
+    nRet=shutdown(pSocket->m_Socket, DIRECTION_TO_NATIVE(Direction));
+    if (nRet != 0 )
+    {
+        pSocket->m_nLastError=errno;
+        int nErrno = errno;
+        SAL_WARN( "sal.osl", "shutdown failed: " << UnixErrnoString(nErrno) );
+    }
+    return (nRet==0);
+}
+
+sal_Int32 SAL_CALL osl_getSocketOption(oslSocket pSocket,
+                            oslSocketOptionLevel    Level,
+                            oslSocketOption         Option,
+                            void*                   pBuffer,
+                            sal_uInt32                  BufferLen)
+{
+    socklen_t nOptLen = static_cast<socklen_t>(BufferLen);
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if ( pSocket == nullptr )
+    {
+        return -1;
+    }
+
+    pSocket->m_nLastError=0;
+
+    if(getsockopt(pSocket->m_Socket,
+                  OPTION_LEVEL_TO_NATIVE(Level),
+                  OPTION_TO_NATIVE(Option),
+                  pBuffer,
+                  &nOptLen) == -1)
+    {
+        pSocket->m_nLastError=errno;
+        return -1;
+    }
+
+    return nOptLen;
+}
+
+sal_Bool SAL_CALL osl_setSocketOption(oslSocket pSocket,
+                            oslSocketOptionLevel    Level,
+                            oslSocketOption         Option,
+                            void*                   pBuffer,
+                            sal_uInt32                  BufferLen)
+{
+    int nRet;
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if ( pSocket == nullptr )
+    {
+        return false;
+    }
+
+    pSocket->m_nLastError=0;
+
+    nRet = setsockopt(pSocket->m_Socket,
+                      OPTION_LEVEL_TO_NATIVE(Level),
+                      OPTION_TO_NATIVE(Option),
+                      pBuffer,
+                      BufferLen);
+
+    if ( nRet < 0 )
+    {
+        pSocket->m_nLastError=errno;
+        return false;
+    }
+
+    return true;
+}
+
+sal_Bool SAL_CALL osl_enableNonBlockingMode(oslSocket pSocket,
+                                  sal_Bool On)
+{
+    int flags;
+    int nRet;
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if ( pSocket == nullptr )
+    {
+        return false;
+    }
+
+    pSocket->m_nLastError=0;
+
+    flags = fcntl(pSocket->m_Socket, F_GETFL, 0);
+
+    if (On)
+        flags |= O_NONBLOCK;
+    else
+        flags &= ~(O_NONBLOCK);
+
+    nRet = fcntl(pSocket->m_Socket, F_SETFL, flags);
+
+    if  ( nRet < 0 )
+    {
+        pSocket->m_nLastError=errno;
+        return false;
+    }
+
+    return true;
+}
+
+sal_Bool SAL_CALL osl_isNonBlockingMode(oslSocket pSocket)
+{
+    int flags;
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if ( pSocket == nullptr )
+    {
+        return false;
+    }
+
+    pSocket->m_nLastError=0;
+
+    flags = fcntl(pSocket->m_Socket, F_GETFL, 0);
+
+    if (flags == -1 || !(flags & O_NONBLOCK))
+        return false;
+
+    return true;
+}
+
+oslSocketType SAL_CALL osl_getSocketType(oslSocket pSocket)
+{
+    int Type=0;
+    socklen_t TypeSize= sizeof(Type);
+
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if ( pSocket == nullptr )
+    {
+        return osl_Socket_TypeInvalid;
+    }
+
+    pSocket->m_nLastError=0;
+
+    if(getsockopt(pSocket->m_Socket,
+                  OPTION_LEVEL_TO_NATIVE(osl_Socket_LevelSocket),
+                  OPTION_TO_NATIVE(osl_Socket_OptionType),
+                  &Type,
+                  &TypeSize) == -1)
+    {
+        /* error */
+        pSocket->m_nLastError=errno;
+        return osl_Socket_TypeInvalid;
+    }
+
+    return TYPE_FROM_NATIVE(Type);
+
+}
+
+void SAL_CALL osl_getLastSocketErrorDescription(oslSocket Socket, rtl_uString **ustrError)
+{
+    char pszError[1024];
+
+    pszError[0] = '\0';
+
+    osl_psz_getLastSocketErrorDescription(Socket,pszError,sizeof(pszError));
+
+    rtl_uString_newFromAscii(ustrError,pszError);
+}
+
+void osl_psz_getLastSocketErrorDescription(oslSocket pSocket, char* pBuffer, sal_uInt32 BufferSize)
+{
+    /* make sure pBuffer will be a zero-terminated string even when strncpy has to cut */
+    pBuffer[BufferSize-1]= '\0';
+
+    if ( pSocket == nullptr )
+    {
+        strncpy(pBuffer, strerror(EINVAL), BufferSize-1);
+        return;
+    }
+
+    strncpy(pBuffer, strerror(pSocket->m_nLastError), BufferSize-1);
+}
+
+oslSocketError SAL_CALL osl_getLastSocketError(oslSocket pSocket)
+{
+    if ( pSocket == nullptr )
+    {
+        return ERROR_FROM_NATIVE(EINVAL);
+    }
+
+    return ERROR_FROM_NATIVE(pSocket->m_nLastError);
+}
+
+struct oslSocketSetImpl
+{
+    int     m_MaxHandle;    /* for select(), the largest descriptor in the set */
+    fd_set  m_Set;          /* the set of descriptors */
+
+};
+
+oslSocketSet SAL_CALL osl_createSocketSet()
+{
+    oslSocketSetImpl* pSet;
+
+    pSet= static_cast<oslSocketSetImpl*>(malloc(sizeof(oslSocketSetImpl)));
+
+    SAL_WARN_IF( !pSet, "sal.osl", "allocation error" );
+
+    if(pSet)
+    {
+        pSet->m_MaxHandle= 0;
+        FD_ZERO(&pSet->m_Set);
+    }
+
+    return pSet;
+}
+
+void SAL_CALL osl_destroySocketSet(oslSocketSet Set)
+{
+    if(Set)
+        free(Set);
+}
+
+void SAL_CALL osl_clearSocketSet(oslSocketSet Set)
+{
+    SAL_WARN_IF( !Set, "sal.osl", "undefined socket set" );
+    if ( Set == nullptr )
+    {
+        return;
+    }
+
+    Set->m_MaxHandle= 0;
+
+    FD_ZERO(&Set->m_Set);
+}
+
+void SAL_CALL osl_addToSocketSet(oslSocketSet Set, oslSocket pSocket)
+{
+    SAL_WARN_IF( !Set, "sal.osl", "undefined socket set" );
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+
+    if ( Set == nullptr || pSocket == nullptr)
+    {
+        return;
+    }
+
+    /* correct max handle */
+    if(pSocket->m_Socket > Set->m_MaxHandle)
+        Set->m_MaxHandle= pSocket->m_Socket;
+    FD_SET(pSocket->m_Socket, &Set->m_Set);
+
+}
+
+void SAL_CALL osl_removeFromSocketSet(oslSocketSet Set, oslSocket pSocket)
+{
+    SAL_WARN_IF( !Set, "sal.osl", "undefined socket set" );
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+
+    if ( Set == nullptr || pSocket == nullptr)
+    {
+        return;
+    }
+
+    /* correct max handle */
+    if(pSocket->m_Socket == Set->m_MaxHandle)
+    {
+        /* not optimal, since the next used descriptor might be */
+        /* much smaller than m_Socket-1, but it will do */
+        Set->m_MaxHandle--;
+        if(Set->m_MaxHandle < 0)
+        {
+            Set->m_MaxHandle= 0;   /* avoid underflow */
+        }
+    }
+
+    FD_CLR(pSocket->m_Socket, &Set->m_Set);
+}
+
+sal_Bool SAL_CALL osl_isInSocketSet(oslSocketSet Set, oslSocket pSocket)
+{
+    SAL_WARN_IF( !Set, "sal.osl", "undefined socket set" );
+    SAL_WARN_IF( !pSocket, "sal.osl", "undefined socket" );
+    if ( Set == nullptr || pSocket == nullptr )
+    {
+        return false;
+    }
+
+    return bool(FD_ISSET(pSocket->m_Socket, &Set->m_Set));
+}
+
+sal_Int32 SAL_CALL osl_demultiplexSocketEvents(oslSocketSet IncomingSet,
+                                    oslSocketSet OutgoingSet,
+                                    oslSocketSet OutOfBandSet,
+                                    const TimeValue* pTimeout)
+{
+    int MaxHandle= 0;
+    struct timeval  tv;
+
+    if (pTimeout)
+    {
+        /* non-blocking call */
+        tv.tv_sec  = pTimeout->Seconds;
+        tv.tv_usec = pTimeout->Nanosec / 1000;
+    }
+
+    /* get max handle from all sets */
+    if (IncomingSet)
+        MaxHandle= IncomingSet->m_MaxHandle;
+
+    if (OutgoingSet && (OutgoingSet->m_MaxHandle > MaxHandle))
+        MaxHandle= OutgoingSet->m_MaxHandle;
+
+    if (OutOfBandSet && (OutOfBandSet->m_MaxHandle > MaxHandle))
+        MaxHandle= OutOfBandSet->m_MaxHandle;
+
+    return select(MaxHandle+1,
+                  IncomingSet  ? PTR_FD_SET(IncomingSet->m_Set)  : nullptr,
+                  OutgoingSet ? PTR_FD_SET(OutgoingSet->m_Set) : nullptr,
+                  OutOfBandSet ? PTR_FD_SET(OutOfBandSet->m_Set) : nullptr,
+                  pTimeout ? &tv : nullptr);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */