X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b715de93a6d773c9ff0c32340f734e27469f2e71..aa78d22e2008726218d47da1f2ac5864c11b8ebb:/src/unix/gsocket.cpp?ds=inline

diff --git a/src/unix/gsocket.cpp b/src/unix/gsocket.cpp
index d7bb9362d3..97eeb0153b 100644
--- a/src/unix/gsocket.cpp
+++ b/src/unix/gsocket.cpp
@@ -1,28 +1,29 @@
 /* -------------------------------------------------------------------------
- * Project: GSocket (Generic Socket) for WX
- * Name:    gsocket.c
- * Authors: David Elliott (C++ conversion, maintainer)
- *          Guilhem Lavaux,
- *          Guillermo Rodriguez Garcia <guille@iies.es>
- * Purpose: GSocket main Unix and OS/2 file
- * Licence: The wxWindows licence
- * CVSID:   $Id$
+ * Project:     GSocket (Generic Socket) for WX
+ * Name:        gsocket.c
+ * Copyright:   (c) Guilhem Lavaux
+ * Licence:     wxWindows Licence
+ * Authors:     David Elliott (C++ conversion, maintainer)
+ *              Guilhem Lavaux,
+ *              Guillermo Rodriguez Garcia <guille@iies.es>
+ * Purpose:     GSocket main Unix and OS/2 file
+ * Licence:     The wxWindows licence
+ * CVSID:       $Id$
  * -------------------------------------------------------------------------
  */
 
-/*
- * PLEASE don't put C++ comments here - this is a C source file.
- */
+#if defined(__WATCOMC__)
+#include "wx/wxprec.h"
+#include <errno.h>
+#include <nerrno.h>
+#endif
 
 #ifndef __GSOCKET_STANDALONE__
-#include "wx/setup.h"
+#include "wx/defs.h"
 #endif
 
 #if defined(__VISAGECPP__)
-/* Seems to be needed by Visual Age C++, though I don't see how it manages
-   to not break on including a C++ header into a plain C source file      */
-#include "wx/defs.h"
-#define BSD_SELECT /* use Berkley Sockets select */
+#define BSD_SELECT /* use Berkeley Sockets select */
 #endif
 
 #if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
@@ -101,30 +102,33 @@ int _System soclose(int);
 #ifdef sgi
 #  include <bstring.h>
 #endif
+#ifdef _AIX
+#  include <strings.h>
+#endif
 #include <signal.h>
 
-#ifndef SOCKLEN_T
+#ifndef WX_SOCKLEN_T
 
 #ifdef VMS
-#  define SOCKLEN_T unsigned int
+#  define WX_SOCKLEN_T unsigned int
 #else
 #  ifdef __GLIBC__
 #    if __GLIBC__ == 2
-#      define SOCKLEN_T socklen_t
+#      define WX_SOCKLEN_T socklen_t
 #    endif
+#  elif defined(__WXMAC__)
+#    define WX_SOCKLEN_T socklen_t
 #  else
-#    define SOCKLEN_T int
+#    define WX_SOCKLEN_T int
 #  endif
 #endif
 
-#else
-   /* undefine for OSX - its really an int */
-#  ifdef __DARWIN__
-#    undef SOCKLEN_T
-#    define SOCKLEN_T int
-#  endif
 #endif /* SOCKLEN_T */
 
+#ifndef SOCKOPTLEN_T
+#define SOCKOPTLEN_T WX_SOCKLEN_T
+#endif
+
 /*
  * MSW defines this, Unices don't.
  */
@@ -145,25 +149,218 @@ int _System soclose(int);
 #define INADDR_NONE INADDR_BROADCAST
 #endif
 
-#define MASK_SIGNAL()                       \
-{                                           \
-  void (*old_handler)(int);                 \
-                                            \
-  old_handler = signal(SIGPIPE, SIG_IGN);
+#if defined(__VISAGECPP__) || defined(__WATCOMC__)
 
-#define UNMASK_SIGNAL()                     \
-  signal(SIGPIPE, old_handler);             \
-}
+    #define MASK_SIGNAL() {
+    #define UNMASK_SIGNAL() }
 
+#else
+    extern "C" { typedef void (*wxSigHandler)(int); }
+
+    #define MASK_SIGNAL()                       \
+    {                                           \
+        wxSigHandler old_handler = signal(SIGPIPE, SIG_IGN);
+
+    #define UNMASK_SIGNAL()                     \
+        signal(SIGPIPE, old_handler);           \
+    }
+
+#endif
+
+/* If a SIGPIPE is issued by a socket call on a remotely closed socket,
+   the program will "crash" unless it explicitly handles the SIGPIPE.
+   By using MSG_NOSIGNAL, the SIGPIPE is suppressed. Later, we will
+   use SO_NOSIGPIPE (if available), the BSD equivalent. */
+#ifdef MSG_NOSIGNAL
+#  define GSOCKET_MSG_NOSIGNAL MSG_NOSIGNAL
+#else /* MSG_NOSIGNAL not available (FreeBSD including OS X) */
+#  define GSOCKET_MSG_NOSIGNAL 0
+#endif /* MSG_NOSIGNAL */
 
 #ifndef __GSOCKET_STANDALONE__
 #  include "wx/unix/gsockunx.h"
+#  include "wx/unix/private.h"
 #  include "wx/gsocket.h"
+#if wxUSE_THREADS && (defined(HAVE_GETHOSTBYNAME) || defined(HAVE_GETSERVBYNAME))
+#  include "wx/thread.h"
+#endif
 #else
 #  include "gsockunx.h"
 #  include "gsocket.h"
+#  ifndef WXUNUSED
+#    define WXUNUSED(x)
+#  endif
 #endif /* __GSOCKET_STANDALONE__ */
 
+#if defined(HAVE_GETHOSTBYNAME)
+static struct hostent * deepCopyHostent(struct hostent *h,
+					const struct hostent *he,
+					char *buffer, int size, int *err)
+{
+  memcpy(h, he, sizeof(struct hostent));
+  int len = strlen(h->h_name);
+  if (len > size)
+    len = size - 1;
+  memcpy(buffer, h->h_name, len);
+  buffer[len] = '\0';
+  h->h_name = buffer;
+  buffer += len + 1;
+  size -= len + 1;
+  len = h->h_length;
+  for (char **p = h->h_addr_list; *p != 0; p++) {
+    if (size < len){
+      *err = ENOMEM;
+      return NULL;
+    }
+    memcpy(buffer, *p, len);
+    *p = buffer;
+    buffer += len;
+    size -= len;
+  }
+  for (char **q = h->h_aliases; size > 0 && *q != 0; q++){
+    len = strlen(*q);
+    if (len > size)
+      len = size - 1;
+    memcpy(buffer, *q, len);
+    buffer[len] = '\0';
+    *q = buffer;
+    buffer += len + 1;
+    size -= len + 1;
+  }
+  return h;
+}
+#endif
+
+struct hostent * wxGethostbyname_r(const char *hostname, struct hostent *h,
+				   void *buffer, int size, int *err)
+
+{
+  struct hostent *he = NULL;
+  *err = 0;
+#if defined(HAVE_FUNC_GETHOSTBYNAME_R_6)
+  if (gethostbyname_r(hostname, h, (char*)buffer, size, &he, err))
+    he = NULL;
+#elif defined(HAVE_FUNC_GETHOSTBYNAME_R_5)
+  he = gethostbyname_r(hostname, h, (char*)buffer, size, err);
+#elif defined(HAVE_FUNC_GETHOSTBYNAME_R_3)
+  if (gethostbyname_r(hostname, h, (struct hostent_data*) buffer))
+  {
+    he = NULL;
+    *err = h_errno;
+  }
+  else
+    he = h;
+#elif defined(HAVE_GETHOSTBYNAME)
+#if wxUSE_THREADS
+  static wxMutex nameLock;
+  wxMutexLocker locker(nameLock);
+#endif
+  he = gethostbyname(hostname);
+  if (!he)
+    *err = h_errno;
+  else
+    he = deepCopyHostent(h, he, (char*)buffer, size, err);
+#endif
+  return he;
+}
+
+struct hostent * wxGethostbyaddr_r(const char *addr_buf, int buf_size,
+				   int proto, struct hostent *h,
+				   void *buffer, int size, int *err)
+{
+  struct hostent *he = NULL;
+  *err = 0;
+#if defined(HAVE_FUNC_GETHOSTBYNAME_R_6)
+  if (gethostbyaddr_r(addr_buf, buf_size, proto, h,
+		      (char*)buffer, size, &he, err))
+    he = NULL;
+#elif defined(HAVE_FUNC_GETHOSTBYNAME_R_5)
+  he = gethostbyaddr_r(addr_buf, buf_size, proto, h, (char*)buffer, size, err);
+#elif defined(HAVE_FUNC_GETHOSTBYNAME_R_3)
+  if (gethostbyaddr_r(addr_buf, buf_size, proto, h,
+			(struct hostent_data*) buffer))
+  {
+    he = NULL;
+    *err = h_errno;
+  }
+  else
+    he = h;
+#elif defined(HAVE_GETHOSTBYNAME)
+#if wxUSE_THREADS
+  static wxMutex addrLock;
+  wxMutexLocker locker(addrLock);
+#endif
+  he = gethostbyaddr(addr_buf, buf_size, proto);
+  if (!he)
+    *err = h_errno;
+  else
+    he = deepCopyHostent(h, he, (char*)buffer, size, err);
+#endif
+  return he;
+}
+
+#if defined(HAVE_GETSERVBYNAME)
+static struct servent * deepCopyServent(struct servent *s,
+					const struct servent *se,
+					char *buffer, int size)
+{
+  memcpy(s, se, sizeof(struct servent));
+  int len = strlen(s->s_name);
+  if (len > size)
+    len = size - 1;
+  memcpy(buffer, s->s_name, len);
+  buffer[len] = '\0';
+  s->s_name = buffer;
+  buffer += len + 1;
+  size -= len + 1;
+  len = strlen(s->s_proto);
+  if (len > size)
+    len = size - 1;
+  memcpy(buffer, s->s_proto, len);
+  buffer[len] = '\0';
+  s->s_proto = buffer;
+  buffer += len + 1;
+  size -= len + 1;
+  for (char **q = s->s_aliases; size > 0 && *q != 0; q++){
+    len = strlen(*q);
+    if (len > size)
+      len = size - 1;
+    memcpy(buffer, *q, len);
+    buffer[len] = '\0';
+    *q = buffer;
+    buffer += len + 1;
+    size -= len + 1;
+  }
+  return s;
+}
+#endif
+
+struct servent *wxGetservbyname_r(const char *port, const char *protocol,
+				  struct servent *serv, void *buffer, int size)
+{
+  struct servent *se = NULL;
+#if defined(HAVE_FUNC_GETSERVBYNAME_R_6)
+  if (getservbyname_r(port, protocol, serv, (char*)buffer, size, &se))
+    se = NULL;
+#elif defined(HAVE_FUNC_GETSERVBYNAME_R_5)
+  se = getservbyname_r(port, protocol, serv, (char*)buffer, size);
+#elif defined(HAVE_FUNC_GETSERVBYNAME_R_4)
+  if (getservbyname_r(port, protocol, serv, (struct servent_data*) buffer))
+    se = NULL;
+  else
+    se = serv;
+#elif defined(HAVE_GETSERVBYNAME)
+#if wxUSE_THREADS
+  static wxMutex servLock;
+  wxMutexLocker locker(servLock);
+#endif
+  se = getservbyname(port, protocol);
+  if (se)
+    se = deepCopyServent(serv, se, (char*)buffer, size);
+#endif
+  return se;
+}
+
 /* debugging helpers */
 #ifdef __GSOCKET_DEBUG__
 #  define GSocket_Debug(args) printf args
@@ -196,17 +393,17 @@ void GSocketGUIFunctionsTableNull::OnExit()
 {}
 bool GSocketGUIFunctionsTableNull::CanUseEventLoop()
 {   return false; }
-bool GSocketGUIFunctionsTableNull::Init_Socket(GSocket *socket)
+bool GSocketGUIFunctionsTableNull::Init_Socket(GSocket *WXUNUSED(socket))
 {   return true; }
-void GSocketGUIFunctionsTableNull::Destroy_Socket(GSocket *socket)
+void GSocketGUIFunctionsTableNull::Destroy_Socket(GSocket *WXUNUSED(socket))
 {}
-void GSocketGUIFunctionsTableNull::Install_Callback(GSocket *socket, GSocketEvent event)
+void GSocketGUIFunctionsTableNull::Install_Callback(GSocket *WXUNUSED(socket), GSocketEvent WXUNUSED(event))
 {}
-void GSocketGUIFunctionsTableNull::Uninstall_Callback(GSocket *socket, GSocketEvent event)
+void GSocketGUIFunctionsTableNull::Uninstall_Callback(GSocket *WXUNUSED(socket), GSocketEvent WXUNUSED(event))
 {}
-void GSocketGUIFunctionsTableNull::Enable_Events(GSocket *socket)
+void GSocketGUIFunctionsTableNull::Enable_Events(GSocket *WXUNUSED(socket))
 {}
-void GSocketGUIFunctionsTableNull::Disable_Events(GSocket *socket)
+void GSocketGUIFunctionsTableNull::Disable_Events(GSocket *WXUNUSED(socket))
 {}
 /* Global initialisers */
 
@@ -303,6 +500,9 @@ void GSocket::Shutdown()
 
   assert(this);
 
+  /* Don't allow events to fire after socket has been closed */
+  gs_gui_functions->Disable_Events(this);
+
   /* If socket has been created, shutdown it */
   if (m_fd != INVALID_SOCKET)
   {
@@ -382,7 +582,7 @@ GAddress *GSocket::GetLocal()
 {
   GAddress *address;
   struct sockaddr addr;
-  SOCKLEN_T size = sizeof(addr);
+  WX_SOCKLEN_T size = sizeof(addr);
   GSocketError err;
 
   assert(this);
@@ -398,7 +598,7 @@ GAddress *GSocket::GetLocal()
     return NULL;
   }
 
-  if (getsockname(m_fd, &addr, (SOCKLEN_T *) &size) < 0)
+  if (getsockname(m_fd, &addr, (WX_SOCKLEN_T *) &size) < 0)
   {
     m_error = GSOCK_IOERR;
     return NULL;
@@ -478,6 +678,12 @@ GSocketError GSocket::SetServer()
     m_error = GSOCK_IOERR;
     return GSOCK_IOERR;
   }
+
+  /* FreeBSD variants can't use MSG_NOSIGNAL, and instead use a socket option */
+#ifdef SO_NOSIGPIPE
+  setsockopt(m_fd, SOL_SOCKET, SO_NOSIGPIPE, (const char*)&arg, sizeof(u_long));
+#endif
+
   ioctl(m_fd, FIONBIO, &arg);
   gs_gui_functions->Enable_Events(this);
 
@@ -485,7 +691,12 @@ GSocketError GSocket::SetServer()
      state after being previously closed.
    */
   if (m_reusable)
+  {
     setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(u_long));
+#ifdef SO_REUSEPORT
+    setsockopt(m_fd, SOL_SOCKET, SO_REUSEPORT, (const char*)&arg, sizeof(u_long));
+#endif
+  }
 
   /* Bind to the local address,
    * retrieve the actual address bound,
@@ -494,7 +705,7 @@ GSocketError GSocket::SetServer()
   if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) ||
       (getsockname(m_fd,
                    m_local->m_addr,
-                   (SOCKLEN_T *) &m_local->m_len) != 0) ||
+                   (WX_SOCKLEN_T *) &m_local->m_len) != 0) ||
       (listen(m_fd, 5) != 0))
   {
     Close();
@@ -520,16 +731,13 @@ GSocketError GSocket::SetServer()
 GSocket *GSocket::WaitConnection()
 {
   struct sockaddr from;
-  SOCKLEN_T fromlen = sizeof(from);
+  WX_SOCKLEN_T fromlen = sizeof(from);
   GSocket *connection;
   GSocketError err;
   int arg = 1;
 
   assert(this);
 
-  /* Reenable CONNECTION events */
-  Enable(GSOCK_CONNECTION);
-
   /* If the socket has already been created, we exit immediately */
   if (m_fd == INVALID_SOCKET || !m_server)
   {
@@ -554,7 +762,10 @@ GSocket *GSocket::WaitConnection()
     return NULL;
   }
 
-  connection->m_fd = accept(m_fd, &from, (SOCKLEN_T *) &fromlen);
+  connection->m_fd = accept(m_fd, &from, (WX_SOCKLEN_T *) &fromlen);
+
+  /* Reenable CONNECTION events */
+  Enable(GSOCK_CONNECTION);
 
   if (connection->m_fd == INVALID_SOCKET)
   {
@@ -579,14 +790,15 @@ GSocket *GSocket::WaitConnection()
     m_error = GSOCK_MEMERR;
     return NULL;
   }
+
   err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
   if (err != GSOCK_NOERROR)
   {
-    GAddress_destroy(connection->m_peer);
     delete connection;
     m_error = err;
     return NULL;
   }
+
 #if defined(__EMX__) || defined(__VISAGECPP__)
   ioctl(connection->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 #else
@@ -600,10 +812,13 @@ GSocket *GSocket::WaitConnection()
 bool GSocket::SetReusable()
 {
     /* socket must not be null, and must not be in use/already bound */
-    if (this && m_fd == INVALID_SOCKET) {
+    if (this && m_fd == INVALID_SOCKET)
+    {
         m_reusable = true;
+
         return true;
     }
+
     return false;
 }
 
@@ -613,7 +828,7 @@ bool GSocket::SetReusable()
  *  For stream (connection oriented) sockets, GSocket_Connect() tries
  *  to establish a client connection to a server using the peer address
  *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
- *  connection has been succesfully established, or one of the error
+ *  connection has been successfully established, or one of the error
  *  codes listed below. Note that for nonblocking sockets, a return
  *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
  *  request can be completed later; you should use GSocket_Select()
@@ -668,16 +883,47 @@ GSocketError GSocket::Connect(GSocketStream stream)
     m_error = GSOCK_IOERR;
     return GSOCK_IOERR;
   }
+
+  /* FreeBSD variants can't use MSG_NOSIGNAL, and instead use a socket option */
+#ifdef SO_NOSIGPIPE
+  setsockopt(m_fd, SOL_SOCKET, SO_NOSIGPIPE, (const char*)&arg, sizeof(u_long));
+#endif
+
 #if defined(__EMX__) || defined(__VISAGECPP__)
   ioctl(m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 #else
   ioctl(m_fd, FIONBIO, &arg);
 #endif
-  gs_gui_functions->Enable_Events(this);
+
+  // If the reuse flag is set, use the applicable socket reuse flags(s)
+  if (m_reusable)
+  {
+    setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(u_long));
+#ifdef SO_REUSEPORT
+    setsockopt(m_fd, SOL_SOCKET, SO_REUSEPORT, (const char*)&arg, sizeof(u_long));
+#endif
+  }
+
+  // If a local address has been set, then we need to bind to it before calling connect
+  if (m_local && m_local->m_addr)
+  {
+     bind(m_fd, m_local->m_addr, m_local->m_len);
+  }
 
   /* Connect it to the peer address, with a timeout (see below) */
   ret = connect(m_fd, m_peer->m_addr, m_peer->m_len);
 
+  /* We only call Enable_Events if we know we aren't shutting down the socket.
+   * NB: Enable_Events needs to be called whether the socket is blocking or
+   * non-blocking, it just shouldn't be called prior to knowing there is a
+   * connection _if_ blocking sockets are being used.
+   * If connect above returns 0, we are already connected and need to make the
+   * call to Enable_Events now.
+   */
+
+  if (m_non_blocking || ret == 0)
+    gs_gui_functions->Enable_Events(this);
+
   if (ret == -1)
   {
     err = errno;
@@ -698,9 +944,11 @@ GSocketError GSocket::Connect(GSocketStream stream)
       else
       {
         int error;
-        SOCKLEN_T len = sizeof(error);
+        SOCKOPTLEN_T len = sizeof(error);
+
+        getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*) &error, &len);
 
-        getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (void*) &error, &len);
+        gs_gui_functions->Enable_Events(this);
 
         if (!error)
           return GSOCK_NOERROR;
@@ -725,6 +973,7 @@ GSocketError GSocket::Connect(GSocketStream stream)
      */
     Close();
     m_error = GSOCK_IOERR;
+
     return GSOCK_IOERR;
   }
 
@@ -787,7 +1036,7 @@ GSocketError GSocket::SetNonOriented()
   if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) ||
       (getsockname(m_fd,
                    m_local->m_addr,
-                   (SOCKLEN_T *) &m_local->m_len) != 0))
+                   (WX_SOCKLEN_T *) &m_local->m_len) != 0))
   {
     Close();
     m_error = GSOCK_IOERR;
@@ -816,23 +1065,33 @@ int GSocket::Read(char *buffer, int size)
   Disable(GSOCK_INPUT);
 
   /* If the socket is blocking, wait for data (with a timeout) */
-  if (Input_Timeout() == GSOCK_TIMEDOUT)
-    /* We no longer return here immediately, otherwise socket events would not be re-enabled! */
+  if (Input_Timeout() == GSOCK_TIMEDOUT) {
+    m_error = GSOCK_TIMEDOUT;
+    /* Don't return here immediately, otherwise socket events would not be
+     * re-enabled! */
     ret = -1;
-  else {
+  }
+  else
+  {
     /* Read the data */
     if (m_stream)
       ret = Recv_Stream(buffer, size);
     else
       ret = Recv_Dgram(buffer, size);
-  }
 
-  if (ret == -1)
-  {
-    if (errno == EWOULDBLOCK)
-      m_error = GSOCK_WOULDBLOCK;
-    else
+    /* If recv returned zero, then the connection is lost, and errno is not set.
+     * Otherwise, recv has returned an error (-1), in which case we have lost the
+     * socket only if errno does _not_ indicate that there may be more data to read.
+     */
+    if (ret == 0)
       m_error = GSOCK_IOERR;
+    else if (ret == -1)
+    {
+      if ((errno == EWOULDBLOCK) || (errno == EAGAIN))
+        m_error = GSOCK_WOULDBLOCK;
+      else
+        m_error = GSOCK_IOERR;
+    }
   }
 
   /* Enable events again now that we are done processing */
@@ -873,7 +1132,7 @@ int GSocket::Write(const char *buffer, int size)
 
   if (ret == -1)
   {
-    if (errno == EWOULDBLOCK)
+    if ((errno == EWOULDBLOCK) || (errno == EAGAIN))
     {
       m_error = GSOCK_WOULDBLOCK;
       GSocket_Debug(( "GSocket_Write error WOULDBLOCK\n" ));
@@ -890,6 +1149,7 @@ int GSocket::Write(const char *buffer, int size)
      * will further OUTPUT events be posted.
      */
     Enable(GSOCK_OUTPUT);
+
     return -1;
   }
 
@@ -918,17 +1178,20 @@ GSocketEventFlags GSocket::Select(GSocketEventFlags flags)
 
     assert(this);
 
+    if (m_fd == -1)
+        return (GSOCK_LOST_FLAG & flags);
+
     /* Do not use a static struct, Linux can garble it */
     tv.tv_sec = m_timeout / 1000;
     tv.tv_usec = (m_timeout % 1000) * 1000;
 
-    FD_ZERO(&readfds);
-    FD_ZERO(&writefds);
-    FD_ZERO(&exceptfds);
-    FD_SET(m_fd, &readfds);
+    wxFD_ZERO(&readfds);
+    wxFD_ZERO(&writefds);
+    wxFD_ZERO(&exceptfds);
+    wxFD_SET(m_fd, &readfds);
     if (flags & GSOCK_OUTPUT_FLAG || flags & GSOCK_CONNECTION_FLAG)
-      FD_SET(m_fd, &writefds);
-    FD_SET(m_fd, &exceptfds);
+      wxFD_SET(m_fd, &writefds);
+    wxFD_SET(m_fd, &exceptfds);
 
     /* Check 'sticky' CONNECTION flag first */
     result |= (GSOCK_CONNECTION_FLAG & m_detected);
@@ -950,44 +1213,42 @@ GSocketEventFlags GSocket::Select(GSocketEventFlags flags)
       return (result & flags);
     }
 
+    /* Check for exceptions and errors */
+    if (wxFD_ISSET(m_fd, &exceptfds))
+    {
+      m_establishing = false;
+      m_detected = GSOCK_LOST_FLAG;
+
+      /* LOST event: Abort any further processing */
+      return (GSOCK_LOST_FLAG & flags);
+    }
+
     /* Check for readability */
-    if (FD_ISSET(m_fd, &readfds))
+    if (wxFD_ISSET(m_fd, &readfds))
     {
-      char c;
+      result |= GSOCK_INPUT_FLAG;
 
-      if (recv(m_fd, &c, 1, MSG_PEEK) > 0)
+      if (m_server && m_stream)
       {
-        result |= GSOCK_INPUT_FLAG;
-      }
-      else
-      {
-        if (m_server && m_stream)
-        {
-          result |= GSOCK_CONNECTION_FLAG;
-          m_detected |= GSOCK_CONNECTION_FLAG;
-        }
-        else
-        {
-          m_detected = GSOCK_LOST_FLAG;
-          m_establishing = false;
-
-          /* LOST event: Abort any further processing */
-          return (GSOCK_LOST_FLAG & flags);
-        }
+        /* This is a TCP server socket that detected a connection.
+          While the INPUT_FLAG is also set, it doesn't matter on
+          this kind of  sockets, as we can only Accept() from them. */        
+        result |= GSOCK_CONNECTION_FLAG;
+        m_detected |= GSOCK_CONNECTION_FLAG;
       }
     }
 
     /* Check for writability */
-    if (FD_ISSET(m_fd, &writefds))
+    if (wxFD_ISSET(m_fd, &writefds))
     {
       if (m_establishing && !m_server)
       {
         int error;
-        SOCKLEN_T len = sizeof(error);
+        SOCKOPTLEN_T len = sizeof(error);
 
         m_establishing = false;
 
-        getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
+        getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len);
 
         if (error)
         {
@@ -1008,25 +1269,13 @@ GSocketEventFlags GSocket::Select(GSocketEventFlags flags)
       }
     }
 
-    /* Check for exceptions and errors (is this useful in Unices?) */
-    if (FD_ISSET(m_fd, &exceptfds))
-    {
-      m_establishing = false;
-      m_detected = GSOCK_LOST_FLAG;
-
-      /* LOST event: Abort any further processing */
-      return (GSOCK_LOST_FLAG & flags);
-    }
-
     return (result & flags);
 
   }
   else
   {
-
     assert(this);
     return flags & m_detected;
-
   }
 }
 
@@ -1057,7 +1306,7 @@ void GSocket::SetTimeout(unsigned long millisec)
 }
 
 /* GSocket_GetError:
- *  Returns the last error occured for this socket. Note that successful
+ *  Returns the last error occurred for this socket. Note that successful
  *  operations do not clear this back to GSOCK_NOERROR, so use it only
  *  after an error.
  */
@@ -1082,7 +1331,7 @@ GSocketError WXDLLIMPEXP_NET GSocket::GetError()
  *   assume that it can write since the first OUTPUT event, and no more
  *   OUTPUT events will be generated unless an error occurs.
  * GSOCK_CONNECTION:
- *   Connection succesfully established, for client sockets, or incoming
+ *   Connection successfully established, for client sockets, or incoming
  *   client connection, for server sockets. Wait for this event (also watch
  *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
  * GSOCK_LOST:
@@ -1138,20 +1387,18 @@ void GSocket::UnsetCallback(GSocketEventFlags flags)
 GSocketError GSocket::GetSockOpt(int level, int optname,
                                 void *optval, int *optlen)
 {
-    if (getsockopt(m_fd, level, optname, optval, (SOCKLEN_T*)optlen) == 0)
-    {
+    if (getsockopt(m_fd, level, optname, (char*)optval, (SOCKOPTLEN_T*)optlen) == 0)
         return GSOCK_NOERROR;
-    }
+
     return GSOCK_OPTERR;
 }
 
 GSocketError GSocket::SetSockOpt(int level, int optname,
                                 const void *optval, int optlen)
 {
-    if (setsockopt(m_fd, level, optname, optval, optlen) == 0)
-    {
+    if (setsockopt(m_fd, level, optname, (const char*)optval, optlen) == 0)
         return GSOCK_NOERROR;
-    }
+
     return GSOCK_OPTERR;
 }
 
@@ -1190,8 +1437,8 @@ GSocketError GSocket::Input_Timeout()
 
   if (!m_non_blocking)
   {
-    FD_ZERO(&readfds);
-    FD_SET(m_fd, &readfds);
+    wxFD_ZERO(&readfds);
+    wxFD_SET(m_fd, &readfds);
     ret = select(m_fd + 1, &readfds, NULL, NULL, &tv);
     if (ret == 0)
     {
@@ -1199,6 +1446,7 @@ GSocketError GSocket::Input_Timeout()
       m_error = GSOCK_TIMEDOUT;
       return GSOCK_TIMEDOUT;
     }
+
     if (ret == -1)
     {
       GSocket_Debug(( "GSocket_Input_Timeout, select returned -1\n" ));
@@ -1210,6 +1458,7 @@ GSocketError GSocket::Input_Timeout()
       return GSOCK_TIMEDOUT;
     }
   }
+
   return GSOCK_NOERROR;
 }
 
@@ -1231,8 +1480,8 @@ GSocketError GSocket::Output_Timeout()
 
   if (!m_non_blocking)
   {
-    FD_ZERO(&writefds);
-    FD_SET(m_fd, &writefds);
+    wxFD_ZERO(&writefds);
+    wxFD_SET(m_fd, &writefds);
     ret = select(m_fd + 1, NULL, &writefds, NULL, &tv);
     if (ret == 0)
     {
@@ -1240,6 +1489,7 @@ GSocketError GSocket::Output_Timeout()
       m_error = GSOCK_TIMEDOUT;
       return GSOCK_TIMEDOUT;
     }
+
     if (ret == -1)
     {
       GSocket_Debug(( "GSocket_Output_Timeout, select returned -1\n" ));
@@ -1250,10 +1500,13 @@ GSocketError GSocket::Output_Timeout()
       m_error = GSOCK_TIMEDOUT;
       return GSOCK_TIMEDOUT;
     }
-    if ( ! FD_ISSET(m_fd, &writefds) ) {
+
+    if ( ! wxFD_ISSET(m_fd, &writefds) )
+    {
         GSocket_Debug(( "GSocket_Output_Timeout is buggy!\n" ));
     }
-    else {
+    else
+    {
         GSocket_Debug(( "GSocket_Output_Timeout seems correct\n" ));
     }
   }
@@ -1267,19 +1520,30 @@ GSocketError GSocket::Output_Timeout()
 
 int GSocket::Recv_Stream(char *buffer, int size)
 {
-  return recv(m_fd, buffer, size, 0);
+  int ret;
+  do
+  {
+    ret = recv(m_fd, buffer, size, GSOCKET_MSG_NOSIGNAL);
+  }
+  while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
+
+  return ret;
 }
 
 int GSocket::Recv_Dgram(char *buffer, int size)
 {
   struct sockaddr from;
-  SOCKLEN_T fromlen = sizeof(from);
+  WX_SOCKLEN_T fromlen = sizeof(from);
   int ret;
   GSocketError err;
 
   fromlen = sizeof(from);
 
-  ret = recvfrom(m_fd, buffer, size, 0, &from, (SOCKLEN_T *) &fromlen);
+  do
+  {
+    ret = recvfrom(m_fd, buffer, size, 0, &from, (WX_SOCKLEN_T *) &fromlen);
+  }
+  while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
 
   if (ret == -1)
     return -1;
@@ -1294,6 +1558,7 @@ int GSocket::Recv_Dgram(char *buffer, int size)
       return -1;
     }
   }
+
   err = _GAddress_translate_from(m_peer, &from, fromlen);
   if (err != GSOCK_NOERROR)
   {
@@ -1310,13 +1575,15 @@ int GSocket::Send_Stream(const char *buffer, int size)
 {
   int ret;
 
-#ifndef __VISAGECPP__
   MASK_SIGNAL();
-  ret = send(m_fd, buffer, size, 0);
+
+  do
+  {
+    ret = send(m_fd, (char *)buffer, size, GSOCKET_MSG_NOSIGNAL);
+  }
+  while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
+
   UNMASK_SIGNAL();
-#else
-  ret = send(m_fd, (char *)buffer, size, 0);
-#endif
 
   return ret;
 }
@@ -1340,13 +1607,15 @@ int GSocket::Send_Dgram(const char *buffer, int size)
     return -1;
   }
 
-#ifndef __VISAGECPP__
   MASK_SIGNAL();
-  ret = sendto(m_fd, buffer, size, 0, addr, len);
+
+  do
+  {
+    ret = sendto(m_fd, (char *)buffer, size, 0, addr, len);
+  }
+  while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
+
   UNMASK_SIGNAL();
-#else
-  ret = sendto(m_fd, (char *)buffer, size, 0, addr, len);
-#endif
 
   /* Frees memory allocated from _GAddress_translate_to */
   free(addr);
@@ -1358,6 +1627,12 @@ void GSocket::Detected_Read()
 {
   char c;
 
+  /* Safeguard against straggling call to Detected_Read */
+  if (m_fd == INVALID_SOCKET)
+  {
+    return;
+  }
+
   /* If we have already detected a LOST event, then don't try
    * to do any further processing.
    */
@@ -1370,7 +1645,9 @@ void GSocket::Detected_Read()
     return;
   }
 
-  if (recv(m_fd, &c, 1, MSG_PEEK) > 0)
+  int num =  recv(m_fd, &c, 1, MSG_PEEK | GSOCKET_MSG_NOSIGNAL);
+
+  if (num > 0)
   {
     CALL_CALLBACK(this, GSOCK_INPUT);
   }
@@ -1382,8 +1659,16 @@ void GSocket::Detected_Read()
     }
     else
     {
-      CALL_CALLBACK(this, GSOCK_LOST);
-      Shutdown();
+      /* Do not throw a lost event in cases where the socket isn't really lost */
+      if ((errno == EWOULDBLOCK) || (errno == EAGAIN) || (errno == EINTR))
+      {
+        CALL_CALLBACK(this, GSOCK_INPUT);
+      }
+      else
+      {
+        CALL_CALLBACK(this, GSOCK_LOST);
+        Shutdown();
+      }
     }
   }
 }
@@ -1405,11 +1690,11 @@ void GSocket::Detected_Write()
   if (m_establishing && !m_server)
   {
     int error;
-    SOCKLEN_T len = sizeof(error);
+    SOCKOPTLEN_T len = sizeof(error);
 
     m_establishing = false;
 
-    getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
+    getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len);
 
     if (error)
     {
@@ -1436,9 +1721,11 @@ void GSocket::Detected_Write()
 GSocket *GSocket_new(void)
 {
     GSocket *newsocket = new GSocket();
-    if(newsocket->IsOk())
+    if (newsocket->IsOk())
         return newsocket;
+
     delete newsocket;
+
     return NULL;
 }
 
@@ -1578,6 +1865,7 @@ GSocketError _GAddress_translate_from(GAddress *address,
     address->m_error = GSOCK_MEMERR;
     return GSOCK_MEMERR;
   }
+
   memcpy(address->m_addr, addr, len);
 
   return GSOCK_NOERROR;
@@ -1644,7 +1932,7 @@ GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
   if (inet_aton(hostname, addr) == 0)
   {
 #elif defined(HAVE_INET_ADDR)
-  if ( (addr->s_addr = inet_addr(hostname)) == -1 )
+  if ( (addr->s_addr = inet_addr(hostname)) == (unsigned)-1 )
   {
 #else
   /* Use gethostbyname by default */
@@ -1657,16 +1945,26 @@ GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
     struct in_addr *array_addr;
 
     /* It is a real name, we solve it */
-    if ((he = gethostbyname(hostname)) == NULL)
+    struct hostent h;
+#if defined(HAVE_FUNC_GETHOSTBYNAME_R_3)
+    struct hostent_data buffer;
+#else
+    char buffer[1024];
+#endif
+    int err;
+    he = wxGethostbyname_r(hostname, &h, (void*)&buffer, sizeof(buffer), &err);
+    if (he == NULL)
     {
       /* Reset to invalid address */
       addr->s_addr = INADDR_NONE;
       address->m_error = GSOCK_NOHOST;
       return GSOCK_NOHOST;
     }
+
     array_addr = (struct in_addr *) *(he->h_addr_list);
     addr->s_addr = array_addr[0].s_addr;
   }
+
   return GSOCK_NOERROR;
 }
 
@@ -1705,11 +2003,14 @@ GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
     return GSOCK_INVPORT;
   }
 
-#if defined(__WXPM__) && defined(__EMX__)
-  se = getservbyname(port, (char*)protocol);
+#if defined(HAVE_FUNC_GETSERVBYNAME_R_4)
+    struct servent_data buffer;
 #else
-  se = getservbyname(port, protocol);
+  char buffer[1024];
 #endif
+  struct servent serv;
+  se = wxGetservbyname_r(port, protocol, &serv,
+			 (void*)&buffer, sizeof(buffer));
   if (!se)
   {
     /* the cast to int suppresses compiler warnings about subscript having the
@@ -1759,7 +2060,15 @@ GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t
   addr = (struct sockaddr_in *)address->m_addr;
   addr_buf = (char *)&(addr->sin_addr);
 
-  he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
+  struct hostent temphost;
+#if defined(HAVE_FUNC_GETHOSTBYNAME_R_3)
+  struct hostent_data buffer;
+#else
+  char buffer[1024];
+#endif
+  int err;
+  he = wxGethostbyaddr_r(addr_buf, sizeof(addr->sin_addr), AF_INET, &temphost,
+			 (void*)&buffer, sizeof(buffer), &err);
   if (he == NULL)
   {
     address->m_error = GSOCK_NOHOST;
@@ -1851,4 +2160,3 @@ GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
 }
 #endif  /* !defined(__VISAGECPP__) */
 #endif  /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
-