X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/976abb72fc2a94bf38c9231690ebeabc7631e491..aa78d22e2008726218d47da1f2ac5864c11b8ebb:/src/unix/gsocket.cpp

diff --git a/src/unix/gsocket.cpp b/src/unix/gsocket.cpp
index d9a83d361e..97eeb0153b 100644
--- a/src/unix/gsocket.cpp
+++ b/src/unix/gsocket.cpp
@@ -12,10 +12,6 @@
  * -------------------------------------------------------------------------
  */
 
-/*
- * PLEASE don't put C++ comments here - this is a C source file.
- */
-
 #if defined(__WATCOMC__)
 #include "wx/wxprec.h"
 #include <errno.h>
@@ -27,7 +23,7 @@
 #endif
 
 #if defined(__VISAGECPP__)
-#define BSD_SELECT /* use Berkley Sockets select */
+#define BSD_SELECT /* use Berkeley Sockets select */
 #endif
 
 #if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
@@ -183,7 +179,11 @@ int _System soclose(int);
 
 #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"
@@ -192,6 +192,175 @@ int _System soclose(int);
 #  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
@@ -331,6 +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)
   {
@@ -519,7 +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,
@@ -613,6 +790,7 @@ GSocket *GSocket::WaitConnection()
     m_error = GSOCK_MEMERR;
     return NULL;
   }
+
   err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
   if (err != GSOCK_NOERROR)
   {
@@ -620,6 +798,7 @@ GSocket *GSocket::WaitConnection()
     m_error = err;
     return NULL;
   }
+
 #if defined(__EMX__) || defined(__VISAGECPP__)
   ioctl(connection->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 #else
@@ -633,10 +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;
 }
 
@@ -713,6 +895,21 @@ GSocketError GSocket::Connect(GSocketStream stream)
   ioctl(m_fd, FIONBIO, &arg);
 #endif
 
+  // 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);
 
@@ -721,13 +918,11 @@ GSocketError GSocket::Connect(GSocketStream stream)
    * 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.  
+   * call to Enable_Events now.
    */
-  
+
   if (m_non_blocking || ret == 0)
-  {
     gs_gui_functions->Enable_Events(this);
-  }
 
   if (ret == -1)
   {
@@ -778,6 +973,7 @@ GSocketError GSocket::Connect(GSocketStream stream)
      */
     Close();
     m_error = GSOCK_IOERR;
+
     return GSOCK_IOERR;
   }
 
@@ -875,14 +1071,22 @@ int GSocket::Read(char *buffer, int size)
      * 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 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
@@ -945,6 +1149,7 @@ int GSocket::Write(const char *buffer, int size)
      * will further OUTPUT events be posted.
      */
     Enable(GSOCK_OUTPUT);
+
     return -1;
   }
 
@@ -975,18 +1180,18 @@ GSocketEventFlags GSocket::Select(GSocketEventFlags flags)
 
     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);
@@ -1008,37 +1213,33 @@ GSocketEventFlags GSocket::Select(GSocketEventFlags flags)
       return (result & flags);
     }
 
-    /* Check for readability */
-    if (FD_ISSET(m_fd, &readfds))
+    /* Check for exceptions and errors */
+    if (wxFD_ISSET(m_fd, &exceptfds))
     {
-      char c;
+      m_establishing = false;
+      m_detected = GSOCK_LOST_FLAG;
 
-      int num = recv(m_fd, &c, 1, MSG_PEEK | GSOCKET_MSG_NOSIGNAL);
+      /* LOST event: Abort any further processing */
+      return (GSOCK_LOST_FLAG & flags);
+    }
 
-      if (num > 0)
-      {
-        result |= GSOCK_INPUT_FLAG;
-      }
-      else
-      {
-        if (m_server && m_stream)
-        {
-          result |= GSOCK_CONNECTION_FLAG;
-          m_detected |= GSOCK_CONNECTION_FLAG;
-        }
-        else if ((errno != EWOULDBLOCK) && (errno != EAGAIN) && (errno != EINTR))
-        {
-          m_detected = GSOCK_LOST_FLAG;
-          m_establishing = false;
+    /* Check for readability */
+    if (wxFD_ISSET(m_fd, &readfds))
+    {
+      result |= GSOCK_INPUT_FLAG;
 
-          /* LOST event: Abort any further processing */
-          return (GSOCK_LOST_FLAG & flags);
-        }
+      if (m_server && m_stream)
+      {
+        /* 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)
       {
@@ -1068,25 +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;
-
   }
 }
 
@@ -1199,9 +1388,8 @@ GSocketError GSocket::GetSockOpt(int level, int optname,
                                 void *optval, int *optlen)
 {
     if (getsockopt(m_fd, level, optname, (char*)optval, (SOCKOPTLEN_T*)optlen) == 0)
-    {
         return GSOCK_NOERROR;
-    }
+
     return GSOCK_OPTERR;
 }
 
@@ -1209,9 +1397,8 @@ GSocketError GSocket::SetSockOpt(int level, int optname,
                                 const void *optval, int optlen)
 {
     if (setsockopt(m_fd, level, optname, (const char*)optval, optlen) == 0)
-    {
         return GSOCK_NOERROR;
-    }
+
     return GSOCK_OPTERR;
 }
 
@@ -1250,8 +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)
     {
@@ -1259,6 +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" ));
@@ -1270,6 +1458,7 @@ GSocketError GSocket::Input_Timeout()
       return GSOCK_TIMEDOUT;
     }
   }
+
   return GSOCK_NOERROR;
 }
 
@@ -1291,8 +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)
     {
@@ -1300,6 +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" ));
@@ -1310,10 +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" ));
     }
   }
@@ -1331,7 +1524,9 @@ int GSocket::Recv_Stream(char *buffer, int size)
   do
   {
     ret = recv(m_fd, buffer, size, GSOCKET_MSG_NOSIGNAL);
-  } while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
+  }
+  while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
+
   return ret;
 }
 
@@ -1347,7 +1542,8 @@ int GSocket::Recv_Dgram(char *buffer, int size)
   do
   {
     ret = recvfrom(m_fd, buffer, size, 0, &from, (WX_SOCKLEN_T *) &fromlen);
-  } while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
+  }
+  while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
 
   if (ret == -1)
     return -1;
@@ -1362,6 +1558,7 @@ int GSocket::Recv_Dgram(char *buffer, int size)
       return -1;
     }
   }
+
   err = _GAddress_translate_from(m_peer, &from, fromlen);
   if (err != GSOCK_NOERROR)
   {
@@ -1383,7 +1580,8 @@ int GSocket::Send_Stream(const char *buffer, int size)
   do
   {
     ret = send(m_fd, (char *)buffer, size, GSOCKET_MSG_NOSIGNAL);
-  } while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
+  }
+  while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
 
   UNMASK_SIGNAL();
 
@@ -1414,7 +1612,8 @@ int GSocket::Send_Dgram(const char *buffer, int size)
   do
   {
     ret = sendto(m_fd, (char *)buffer, size, 0, addr, len);
-  } while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
+  }
+  while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
 
   UNMASK_SIGNAL();
 
@@ -1522,9 +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;
 }
 
@@ -1664,6 +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;
@@ -1743,16 +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;
 }
 
@@ -1791,11 +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
@@ -1845,7 +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;