diff --git a/qse/configure b/qse/configure
index 2343c867..c3e741d3 100755
--- a/qse/configure
+++ b/qse/configure
@@ -762,12 +762,12 @@ PTHREAD_CFLAGS
 PTHREAD_LIBS
 PTHREAD_CC
 ax_pthread_config
-SENDFILE_LIBS
-SOCKET_LIBS
 ENABLE_CXX_FALSE
 ENABLE_CXX_TRUE
 BUILD_MODE
 CHAR_MODE
+SENDFILE_LIBS
+SOCKET_LIBS
 LIBM
 WIN32_FALSE
 WIN32_TRUE
@@ -15559,6 +15559,316 @@ done
 
 LIBS="$OLDLIBS"
 
+for ac_func in connect gethostbyname
+do :
+  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
+if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+done
+
+if test "$ac_cv_func_gethostbyname" = "no"
+then
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for gethostbyname in -lnsl" >&5
+$as_echo_n "checking for gethostbyname in -lnsl... " >&6; }
+if test "${ac_cv_lib_nsl_gethostbyname+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lnsl  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char gethostbyname ();
+int
+main ()
+{
+return gethostbyname ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_nsl_gethostbyname=yes
+else
+  ac_cv_lib_nsl_gethostbyname=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_nsl_gethostbyname" >&5
+$as_echo "$ac_cv_lib_nsl_gethostbyname" >&6; }
+if test "x$ac_cv_lib_nsl_gethostbyname" = x""yes; then :
+
+		SOCKET_LIBS="$SOCKET_LIBS -lnsl"
+		$as_echo "#define HAVE_GETHOSTBYNAME 1" >>confdefs.h
+
+
+fi
+
+fi
+if test "$ac_cv_func_connect" = "no"
+then
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for connect in -lsocket" >&5
+$as_echo_n "checking for connect in -lsocket... " >&6; }
+if test "${ac_cv_lib_socket_connect+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lsocket  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char connect ();
+int
+main ()
+{
+return connect ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_socket_connect=yes
+else
+  ac_cv_lib_socket_connect=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_socket_connect" >&5
+$as_echo "$ac_cv_lib_socket_connect" >&6; }
+if test "x$ac_cv_lib_socket_connect" = x""yes; then :
+
+		SOCKET_LIBS="$SOCKET_LIBS -lsocket"
+		$as_echo "#define HAVE_CONNECT 1" >>confdefs.h
+
+
+fi
+
+fi
+
+
+for ac_func in sendfile sendfile64 sendfilev sendfilev64
+do :
+  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
+if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+done
+
+if test "$ac_cv_func_sendfile" = "no"
+then
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sendfile in -lsendfile" >&5
+$as_echo_n "checking for sendfile in -lsendfile... " >&6; }
+if test "${ac_cv_lib_sendfile_sendfile+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lsendfile  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char sendfile ();
+int
+main ()
+{
+return sendfile ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_sendfile_sendfile=yes
+else
+  ac_cv_lib_sendfile_sendfile=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_sendfile_sendfile" >&5
+$as_echo "$ac_cv_lib_sendfile_sendfile" >&6; }
+if test "x$ac_cv_lib_sendfile_sendfile" = x""yes; then :
+
+		SENDFILE_LIBS="-lsendfile"
+		$as_echo "#define HAVE_SENDFILE 1" >>confdefs.h
+
+
+fi
+
+fi
+if test "$ac_cv_func_sendfile64" = "no"
+then
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sendfile64 in -lsendfile" >&5
+$as_echo_n "checking for sendfile64 in -lsendfile... " >&6; }
+if test "${ac_cv_lib_sendfile_sendfile64+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lsendfile  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char sendfile64 ();
+int
+main ()
+{
+return sendfile64 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_sendfile_sendfile64=yes
+else
+  ac_cv_lib_sendfile_sendfile64=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_sendfile_sendfile64" >&5
+$as_echo "$ac_cv_lib_sendfile_sendfile64" >&6; }
+if test "x$ac_cv_lib_sendfile_sendfile64" = x""yes; then :
+
+		SENDFILE_LIBS="-lsendfile"
+		$as_echo "#define HAVE_SENDFILE64 1" >>confdefs.h
+
+
+fi
+
+fi
+if test "$ac_cv_func_sendfilev" = "no"
+then
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sendfilev in -lsendfile" >&5
+$as_echo_n "checking for sendfilev in -lsendfile... " >&6; }
+if test "${ac_cv_lib_sendfile_sendfilev+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lsendfile  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char sendfilev ();
+int
+main ()
+{
+return sendfilev ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_sendfile_sendfilev=yes
+else
+  ac_cv_lib_sendfile_sendfilev=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_sendfile_sendfilev" >&5
+$as_echo "$ac_cv_lib_sendfile_sendfilev" >&6; }
+if test "x$ac_cv_lib_sendfile_sendfilev" = x""yes; then :
+
+		SENDFILE_LIBS="-lsendfile"
+		$as_echo "#define HAVE_SENDFILEV 1" >>confdefs.h
+
+
+fi
+
+fi
+if test "$ac_cv_func_sendfilev64" = "no"
+then
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sendfilev64 in -lsendfile" >&5
+$as_echo_n "checking for sendfilev64 in -lsendfile... " >&6; }
+if test "${ac_cv_lib_sendfile_sendfilev64+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lsendfile  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char sendfilev64 ();
+int
+main ()
+{
+return sendfilev64 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_sendfile_sendfilev64=yes
+else
+  ac_cv_lib_sendfile_sendfilev64=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_sendfile_sendfilev64" >&5
+$as_echo "$ac_cv_lib_sendfile_sendfilev64" >&6; }
+if test "x$ac_cv_lib_sendfile_sendfilev64" = x""yes; then :
+
+		SENDFILE_LIBS="-lsendfile"
+		$as_echo "#define HAVE_SENDFILEV64 1" >>confdefs.h
+
+
+fi
+
+fi
+
+
 ac_header_dirent=no
 for ac_hdr in dirent.h sys/ndir.h sys/dir.h ndir.h; do
   as_ac_Header=`$as_echo "ac_cv_header_dirent_$ac_hdr" | $as_tr_sh`
@@ -17069,199 +17379,6 @@ else
 fi
 
 
-
-OLDLIBS="$LIBS"
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing gethostbyname" >&5
-$as_echo_n "checking for library containing gethostbyname... " >&6; }
-if test "${ac_cv_search_gethostbyname+set}" = set; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_func_search_save_LIBS=$LIBS
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char gethostbyname ();
-int
-main ()
-{
-return gethostbyname ();
-  ;
-  return 0;
-}
-_ACEOF
-for ac_lib in '' nsl; do
-  if test -z "$ac_lib"; then
-    ac_res="none required"
-  else
-    ac_res=-l$ac_lib
-    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
-  fi
-  if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_search_gethostbyname=$ac_res
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext
-  if test "${ac_cv_search_gethostbyname+set}" = set; then :
-  break
-fi
-done
-if test "${ac_cv_search_gethostbyname+set}" = set; then :
-
-else
-  ac_cv_search_gethostbyname=no
-fi
-rm conftest.$ac_ext
-LIBS=$ac_func_search_save_LIBS
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_gethostbyname" >&5
-$as_echo "$ac_cv_search_gethostbyname" >&6; }
-ac_res=$ac_cv_search_gethostbyname
-if test "$ac_res" != no; then :
-  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
-
-fi
-
-LIBS="$OLDLIBS"
-if test "$ac_cv_search_gethostbyname" != "none required" -a "$ac_cv_search_gethostbyname" != "no"
-then
-	SOCKET_LIBS="$SOCKET_LIBS -lnsl"
-fi
-
-OLDLIBS="$LIBS"
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing socket" >&5
-$as_echo_n "checking for library containing socket... " >&6; }
-if test "${ac_cv_search_socket+set}" = set; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_func_search_save_LIBS=$LIBS
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char socket ();
-int
-main ()
-{
-return socket ();
-  ;
-  return 0;
-}
-_ACEOF
-for ac_lib in '' socket; do
-  if test -z "$ac_lib"; then
-    ac_res="none required"
-  else
-    ac_res=-l$ac_lib
-    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
-  fi
-  if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_search_socket=$ac_res
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext
-  if test "${ac_cv_search_socket+set}" = set; then :
-  break
-fi
-done
-if test "${ac_cv_search_socket+set}" = set; then :
-
-else
-  ac_cv_search_socket=no
-fi
-rm conftest.$ac_ext
-LIBS=$ac_func_search_save_LIBS
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_socket" >&5
-$as_echo "$ac_cv_search_socket" >&6; }
-ac_res=$ac_cv_search_socket
-if test "$ac_res" != no; then :
-  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
-
-fi
-
-LIBS="$OLDLIBS"
-if test "$ac_cv_search_socket" != "none required" -a "$ac_cv_search_socket" != "no"
-then
-	SOCKET_LIBS="$SOCKET_LIBS -lsocket"
-fi
-
-
-
-OLDLIBS="$LIBS"
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing sendfile" >&5
-$as_echo_n "checking for library containing sendfile... " >&6; }
-if test "${ac_cv_search_sendfile+set}" = set; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_func_search_save_LIBS=$LIBS
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char sendfile ();
-int
-main ()
-{
-return sendfile ();
-  ;
-  return 0;
-}
-_ACEOF
-for ac_lib in '' sendfile; do
-  if test -z "$ac_lib"; then
-    ac_res="none required"
-  else
-    ac_res=-l$ac_lib
-    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
-  fi
-  if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_search_sendfile=$ac_res
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext
-  if test "${ac_cv_search_sendfile+set}" = set; then :
-  break
-fi
-done
-if test "${ac_cv_search_sendfile+set}" = set; then :
-
-else
-  ac_cv_search_sendfile=no
-fi
-rm conftest.$ac_ext
-LIBS=$ac_func_search_save_LIBS
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_sendfile" >&5
-$as_echo "$ac_cv_search_sendfile" >&6; }
-ac_res=$ac_cv_search_sendfile
-if test "$ac_res" != no; then :
-  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
-
-fi
-
-LIBS="$OLDLIBS"
-if test "$ac_cv_search_sendfile" != "none required" -a "$ac_cv_search_socket" != "no"
-then
-	SENDFILE_LIBS="$SENDFILE_LIBS -lsendfile"
-fi
-
-
 # Check whether --enable-reentrant was given.
 if test "${enable_reentrant+set}" = set; then :
   enableval=$enable_reentrant; enable_reentrant_is=$enableval
diff --git a/qse/configure.ac b/qse/configure.ac
index 64266e37..233d6ba3 100644
--- a/qse/configure.ac
+++ b/qse/configure.ac
@@ -108,6 +108,64 @@ AC_CHECK_FUNCS([pow fmod sin cos tan atan atan2 log exp sqrt])
 AC_CHECK_FUNCS([powf fmodf sinf cosf tanf atanf atan2f logf expf sqrtf])
 LIBS="$OLDLIBS"
 
+dnl OLDLIBS="$LIBS"
+dnl AC_SEARCH_LIBS([connect], [socket])
+dnl LIBS="$OLDLIBS"
+dnl if test "$ac_cv_search_connect" != "none required" -a "$ac_cv_search_connect" != "no"
+dnl then
+dnl	SOCKET_LIBS="$SOCKET_LIBS -lsocket"
+dnl fi
+dnl AC_SUBST(SOCKET_LIBS)
+AC_CHECK_FUNCS([connect gethostbyname])
+if test "$ac_cv_func_gethostbyname" = "no"
+then
+	AC_CHECK_LIB([nsl], [gethostbyname], [
+		SOCKET_LIBS="$SOCKET_LIBS -lnsl"
+		AC_DEFINE(HAVE_GETHOSTBYNAME, 1)
+	])
+fi
+if test "$ac_cv_func_connect" = "no"
+then
+	AC_CHECK_LIB([socket], [connect], [
+		SOCKET_LIBS="$SOCKET_LIBS -lsocket"
+		AC_DEFINE(HAVE_CONNECT, 1)
+	])
+fi
+AC_SUBST(SOCKET_LIBS)
+
+dnl check if sendfile and its variants exist in the standard c library
+dnl it inspects the existence of each missing function in the sendfile library.
+AC_CHECK_FUNCS([sendfile sendfile64 sendfilev sendfilev64])
+if test "$ac_cv_func_sendfile" = "no"
+then
+	AC_CHECK_LIB([sendfile], [sendfile], [
+		SENDFILE_LIBS="-lsendfile"
+		AC_DEFINE(HAVE_SENDFILE, 1)
+	])
+fi
+if test "$ac_cv_func_sendfile64" = "no"
+then
+	AC_CHECK_LIB([sendfile], [sendfile64], [
+		SENDFILE_LIBS="-lsendfile"
+		AC_DEFINE(HAVE_SENDFILE64, 1)
+	])
+fi
+if test "$ac_cv_func_sendfilev" = "no"
+then
+	AC_CHECK_LIB([sendfile], [sendfilev], [
+		SENDFILE_LIBS="-lsendfile"
+		AC_DEFINE(HAVE_SENDFILEV, 1)
+	])
+fi
+if test "$ac_cv_func_sendfilev64" = "no"
+then
+	AC_CHECK_LIB([sendfile], [sendfilev64], [
+		SENDFILE_LIBS="-lsendfile"
+		AC_DEFINE(HAVE_SENDFILEV64, 1)
+	])
+fi
+AC_SUBST(SENDFILE_LIBS)
+
 AC_STRUCT_DIRENT_D_TYPE
 AC_CHECK_MEMBERS([struct stat.st_birthtime])
 AC_CHECK_MEMBERS([struct stat.st_mtim.tv_nsec])
@@ -219,34 +277,6 @@ AC_ARG_ENABLE([cxx], [AS_HELP_STRING([--enable-cxx],[build the library for C++ i
 [test "${HAVE_CXX}" = "yes" || enable_cxx_is="no"]
 AM_CONDITIONAL(ENABLE_CXX, test "${enable_cxx_is}" = "yes" )
 
-
-OLDLIBS="$LIBS"
-AC_SEARCH_LIBS([gethostbyname], [nsl])
-LIBS="$OLDLIBS"
-if test "$ac_cv_search_gethostbyname" != "none required" -a "$ac_cv_search_gethostbyname" != "no"
-then
-	SOCKET_LIBS="$SOCKET_LIBS -lnsl"
-fi
-
-OLDLIBS="$LIBS"
-AC_SEARCH_LIBS([socket], [socket])
-LIBS="$OLDLIBS"
-if test "$ac_cv_search_socket" != "none required" -a "$ac_cv_search_socket" != "no"
-then
-	SOCKET_LIBS="$SOCKET_LIBS -lsocket"
-fi
-
-AC_SUBST(SOCKET_LIBS)
-
-OLDLIBS="$LIBS"
-AC_SEARCH_LIBS([sendfile], [sendfile])
-LIBS="$OLDLIBS"
-if test "$ac_cv_search_sendfile" != "none required" -a "$ac_cv_search_socket" != "no"
-then
-	SENDFILE_LIBS="$SENDFILE_LIBS -lsendfile"
-fi
-AC_SUBST(SENDFILE_LIBS)
-
 AC_ARG_ENABLE([reentrant], [AS_HELP_STRING([--enable-reentrant],[define _REENTRANT (default. yes)])],
 	enable_reentrant_is=$enableval,enable_reentrant_is=yes)
 if test "$enable_reentrant_is" = "yes"
diff --git a/qse/include/qse/config.h.in b/qse/include/qse/config.h.in
index 6dbe9ff9..d03218f8 100644
--- a/qse/include/qse/config.h.in
+++ b/qse/include/qse/config.h.in
@@ -27,6 +27,9 @@
 /* Define to 1 if you have the `backtrace_symbols' function. */
 #undef HAVE_BACKTRACE_SYMBOLS
 
+/* Define to 1 if you have the `connect' function. */
+#undef HAVE_CONNECT
+
 /* Define to 1 if you have the `cos' function. */
 #undef HAVE_COS
 
@@ -73,6 +76,9 @@
 /* Define to 1 if you have the `ftruncate64' function. */
 #undef HAVE_FTRUNCATE64
 
+/* Define to 1 if you have the `gethostbyname' function. */
+#undef HAVE_GETHOSTBYNAME
+
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
@@ -133,6 +139,18 @@
 /* Have PTHREAD_PRIO_INHERIT. */
 #undef HAVE_PTHREAD_PRIO_INHERIT
 
+/* Define to 1 if you have the `sendfile' function. */
+#undef HAVE_SENDFILE
+
+/* Define to 1 if you have the `sendfile64' function. */
+#undef HAVE_SENDFILE64
+
+/* Define to 1 if you have the `sendfilev' function. */
+#undef HAVE_SENDFILEV
+
+/* Define to 1 if you have the `sendfilev64' function. */
+#undef HAVE_SENDFILEV64
+
 /* Define to 1 if you have the <signal.h> header file. */
 #undef HAVE_SIGNAL_H
 
diff --git a/qse/lib/net/httpd.c b/qse/lib/net/httpd.c
index 7d70beca..47b869cd 100644
--- a/qse/lib/net/httpd.c
+++ b/qse/lib/net/httpd.c
@@ -322,6 +322,7 @@ static int activate_listener (qse_httpd_t* httpd, listener_t* l)
 /* TODO: suport https... */
 	sockaddr_t addr;
 	int s = -1, flag;
+	int addrsize;
 
 	QSE_ASSERT (l->handle <= -1);
 
@@ -339,6 +340,7 @@ static int activate_listener (qse_httpd_t* httpd, listener_t* l)
 			addr.in4.sin_family = l->family;	
 			addr.in4.sin_addr = l->addr.in4;
 			addr.in4.sin_port = htons (l->port);
+			addrsize = QSE_SIZEOF(addr.in4);
 			break;
 		}
 
@@ -349,6 +351,7 @@ static int activate_listener (qse_httpd_t* httpd, listener_t* l)
 			addr.in6.sin6_addr = l->addr.in6;
 			addr.in6.sin6_port = htons (l->port);
 			/* TODO: addr.in6.sin6_scope_id  */
+			addrsize = QSE_SIZEOF(addr.in6);
 			break;
 		}
 #endif
@@ -359,7 +362,10 @@ static int activate_listener (qse_httpd_t* httpd, listener_t* l)
 		}
 	}
 
-	if (bind (s, (struct sockaddr*)&addr, QSE_SIZEOF(addr)) <= -1) goto oops_esocket;
+	/* Solaris 8 returns EINVAL if QSE_SIZEOF(addr) is passed in as the 
+	 * address size for AF_INET. */
+	/*if (bind (s, (struct sockaddr*)&addr, QSE_SIZEOF(addr)) <= -1) goto oops_esocket;*/
+	if (bind (s, (struct sockaddr*)&addr, addrsize) <= -1) goto oops_esocket;
 	if (listen (s, 10) <= -1) goto oops_esocket;
 	
 	flag = fcntl (s, F_GETFL);
diff --git a/qse/lib/net/httpd_task.c b/qse/lib/net/httpd_task.c
index 2cac5963..bbed2473 100644
--- a/qse/lib/net/httpd_task.c
+++ b/qse/lib/net/httpd_task.c
@@ -38,12 +38,57 @@
 
 #if defined(HAVE_SYS_SENDFILE_H)
 #	include <sys/sendfile.h>
+#endif
 
+#if defined(HAVE_SENDFILE) && defined(HAVE_SENDFILE64)
 #	if !defined(_LP64) && (QSE_SIZEOF_VOID_P<8) && defined(HAVE_SENDFILE64)
 #		define xsendfile sendfile64
 #	else
 #		define xsendfile sendfile
 #	endif
+#elif defined(HAVE_SENDFILE)
+#	define xsendfile sendfile
+#elif defined(HAVE_SENDFILE64)
+#	define xsendfile sendfile64
+#elif defined(HAVE_SENDFILEV) || defined(HAVE_SENDFILEV64)
+
+static qse_ssize_t xsendfile (
+	int out_fd, int in_fd, qse_foff_t* offset, qse_size_t count)
+{
+#if !defined(_LP64) && (QSE_SIZEOF_VOID_P<8) && defined(HAVE_SENDFILE64)
+	struct sendfilevec64 vec;
+#else
+	struct sendfilevec vec;
+#endif
+	size_t xfer;
+	ssize_t n;
+
+	vec.sfv_fd = in_fd;
+	vec.sfv_flag = 0;
+	if (offset)
+	{
+		vec.sfv_off = *offset; 
+	}
+	else
+	{
+		vec.sfv_off = lseek (in_fd, 0, SEEK_CUR); /* TODO: lseek64 or llseek.. */
+		if (vec.sfv_off == (off_t)-1) return (qse_ssize_t)-1;
+	}
+	vec.sfv_len = count;
+
+#if !defined(_LP64) && (QSE_SIZEOF_VOID_P<8) && defined(HAVE_SENDFILE64)
+	n = sendfilev64 (out_fd, &vec, 1, &xfer);
+#else
+	n = sendfilev (out_fd, &vec, 1, &xfer);
+#endif
+	if (offset) *offset = *offset + xfer;
+
+/* TODO: xfer contains number of byte written even on failure
+on success xfer == n.
+on failure xfer != n.
+ */
+	return n;
+}
 
 #else
 
@@ -53,7 +98,7 @@ static qse_ssize_t xsendfile (
 	qse_mchar_t buf[MAX_SEND_SIZE];
 	qse_ssize_t n;
 
-	if (offset && lseek (in_fd, *offset, SEEK_SET) != *offset) 
+	if (offset && lseek (in_fd, *offset, SEEK_SET) != *offset)  //* 64bit version of lseek...
 		return (qse_ssize_t)-1;
 
 	if (count > QSE_COUNTOF(buf)) count = QSE_COUNTOF(buf);
@@ -404,7 +449,11 @@ static int task_main_file (
 		count
 	);
 
-	if (n <= -1) return -1; /* TODO: any logging */
+	if (n <= -1) 
+	{
+// HANDLE EGAIN specially???
+		return -1; /* TODO: any logging */
+	}
 
 	if (n == 0 && count > 0)
 	{