diff --git a/moo/configure b/moo/configure
index 2dbd9b6..50e7c82 100755
--- a/moo/configure
+++ b/moo/configure
@@ -21047,7 +21047,6 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
 
-
 	if test ${ac_cv_sizeof_socklen_t} -gt 0
 	then
 
@@ -21085,6 +21084,85 @@ $as_echo "$ac_res" >&6; }
 
 $as_echo "#define MOO_SOCKLEN_T_IS_SIGNED 1" >>confdefs.h
 
+ elif eval "test \"\${ax_cv_decl_${typename}_signed}\" = \"no\""; then
+    $as_echo_n ""
+ fi
+
+	fi
+
+	# The cast to long int works around a bug in the HP C Compiler
+# version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
+# declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
+# This bug is HP SR number 8606223364.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking size of sa_family_t" >&5
+$as_echo_n "checking size of sa_family_t... " >&6; }
+if ${ac_cv_sizeof_sa_family_t+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (sa_family_t))" "ac_cv_sizeof_sa_family_t"        "
+		#include <winsock2.h>
+		#include <ws2tcpip.h>
+"; then :
+
+else
+  if test "$ac_cv_type_sa_family_t" = yes; then
+     { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error 77 "cannot compute sizeof (sa_family_t)
+See \`config.log' for more details" "$LINENO" 5; }
+   else
+     ac_cv_sizeof_sa_family_t=0
+   fi
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_sa_family_t" >&5
+$as_echo "$ac_cv_sizeof_sa_family_t" >&6; }
+
+
+
+cat >>confdefs.h <<_ACEOF
+#define SIZEOF_SA_FAMILY_T $ac_cv_sizeof_sa_family_t
+_ACEOF
+
+
+	if test ${ac_cv_sizeof_sa_family_t} -gt 0
+	then
+
+ typename=`echo sa_family_t | sed "s/[^a-zA-Z0-9_]/_/g"`
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether sa_family_t is signed" >&5
+$as_echo_n "checking whether sa_family_t is signed... " >&6; }
+if eval \${ax_cv_decl_${typename}_signed+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <winsock2.h>
+			 #include <ws2tcpip.h>
+int
+main ()
+{
+ int foo [ 1 - 2 * !(((sa_family_t) -1) < 0) ]
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+   eval "ax_cv_decl_${typename}_signed=\"yes\""
+else
+   eval "ax_cv_decl_${typename}_signed=\"no\""
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$ax_cv_decl_${typename}_signed
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+ symbolname=`echo sa_family_t | sed "s/[^a-zA-Z0-9_]/_/g" | tr "a-z" "A-Z"`
+ if eval "test \"\${ax_cv_decl_${typename}_signed}\" = \"yes\""; then
+
+$as_echo "#define MOO_SA_FAMILY_T_IS_SIGNED 1" >>confdefs.h
+
  elif eval "test \"\${ax_cv_decl_${typename}_signed}\" = \"no\""; then
     $as_echo_n ""
  fi
@@ -21272,6 +21350,8 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
 
+
+
 	# The cast to long int works around a bug in the HP C Compiler
 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
 # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
@@ -21281,9 +21361,7 @@ $as_echo_n "checking size of socklen_t... " >&6; }
 if ${ac_cv_sizeof_socklen_t+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (socklen_t))" "ac_cv_sizeof_socklen_t"        "
-		#include <sys/socket.h>
-		#include <netinet/in.h>
+  if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (socklen_t))" "ac_cv_sizeof_socklen_t"        "#include <sys/socket.h>
 "; then :
 
 else
@@ -21308,7 +21386,6 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
 
-
 	if test ${ac_cv_sizeof_socklen_t} -gt 0
 	then
 
@@ -21345,6 +21422,84 @@ $as_echo "$ac_res" >&6; }
 
 $as_echo "#define MOO_SOCKLEN_T_IS_SIGNED 1" >>confdefs.h
 
+ elif eval "test \"\${ax_cv_decl_${typename}_signed}\" = \"no\""; then
+    $as_echo_n ""
+ fi
+
+	fi
+
+	# The cast to long int works around a bug in the HP C Compiler
+# version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
+# declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
+# This bug is HP SR number 8606223364.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking size of sa_family_t" >&5
+$as_echo_n "checking size of sa_family_t... " >&6; }
+if ${ac_cv_sizeof_sa_family_t+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (sa_family_t))" "ac_cv_sizeof_sa_family_t"        "
+		#include <sys/socket.h>
+		#include <netinet/in.h>
+"; then :
+
+else
+  if test "$ac_cv_type_sa_family_t" = yes; then
+     { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error 77 "cannot compute sizeof (sa_family_t)
+See \`config.log' for more details" "$LINENO" 5; }
+   else
+     ac_cv_sizeof_sa_family_t=0
+   fi
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_sa_family_t" >&5
+$as_echo "$ac_cv_sizeof_sa_family_t" >&6; }
+
+
+
+cat >>confdefs.h <<_ACEOF
+#define SIZEOF_SA_FAMILY_T $ac_cv_sizeof_sa_family_t
+_ACEOF
+
+
+	if test ${ac_cv_sizeof_sa_family_t} -gt 0
+	then
+
+ typename=`echo sa_family_t | sed "s/[^a-zA-Z0-9_]/_/g"`
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether sa_family_t is signed" >&5
+$as_echo_n "checking whether sa_family_t is signed... " >&6; }
+if eval \${ax_cv_decl_${typename}_signed+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/socket.h>
+int
+main ()
+{
+ int foo [ 1 - 2 * !(((sa_family_t) -1) < 0) ]
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+   eval "ax_cv_decl_${typename}_signed=\"yes\""
+else
+   eval "ax_cv_decl_${typename}_signed=\"no\""
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$ax_cv_decl_${typename}_signed
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+ symbolname=`echo sa_family_t | sed "s/[^a-zA-Z0-9_]/_/g" | tr "a-z" "A-Z"`
+ if eval "test \"\${ax_cv_decl_${typename}_signed}\" = \"yes\""; then
+
+$as_echo "#define MOO_SA_FAMILY_T_IS_SIGNED 1" >>confdefs.h
+
  elif eval "test \"\${ax_cv_decl_${typename}_signed}\" = \"no\""; then
     $as_echo_n ""
  fi
@@ -21687,6 +21842,16 @@ _ACEOF
 
 
 
+cat >>confdefs.h <<_ACEOF
+#define MOO_SIZEOF_SOCKLEN_T ${ac_cv_sizeof_socklen_t}
+_ACEOF
+
+
+cat >>confdefs.h <<_ACEOF
+#define MOO_SIZEOF_SA_FAMILY_T ${ac_cv_sizeof_sa_family_t}
+_ACEOF
+
+
 moo_package_version_major="`echo ${PACKAGE_VERSION} | cut -d. -f1`"
 moo_package_version_minor="`echo ${PACKAGE_VERSION} | cut -d. -f2`"
 moo_package_version_patch="`echo ${PACKAGE_VERSION} | cut -d. -f3`"
diff --git a/moo/configure.ac b/moo/configure.ac
index ed4b004..98d38ee 100644
--- a/moo/configure.ac
+++ b/moo/configure.ac
@@ -304,7 +304,6 @@ then
 	AC_CHECK_SIZEOF(socklen_t,, [
 		#include <winsock2.h>
 		#include <ws2tcpip.h>])
-
 	if test ${ac_cv_sizeof_socklen_t} -gt 0
 	then
 		AX_CHECK_SIGN([socklen_t],
@@ -313,6 +312,18 @@ then
 			[#include <winsock2.h>
 			 #include <ws2tcpip.h>])
 	fi
+
+	AC_CHECK_SIZEOF(sa_family_t,, [
+		#include <winsock2.h>
+		#include <ws2tcpip.h>])
+	if test ${ac_cv_sizeof_sa_family_t} -gt 0
+	then
+		AX_CHECK_SIGN([sa_family_t],
+			[ AC_DEFINE(MOO_SA_FAMILY_T_IS_SIGNED, 1, [Define if sa_family_t is signed]) ],
+			[ AS_ECHO_N("") ],
+			[#include <winsock2.h>
+			 #include <ws2tcpip.h>])
+	fi
 else
 	AC_CHECK_SIZEOF(struct sockaddr_in,,[
 		#include <sys/socket.h>
@@ -330,10 +341,9 @@ else
 		#include <sys/socket.h>
 		#include <sys/types.h>
 		#include <net/if_dl.h>])
-	AC_CHECK_SIZEOF(socklen_t,, [
-		#include <sys/socket.h>
-		#include <netinet/in.h>])
 
+
+	AC_CHECK_SIZEOF(socklen_t,, [#include <sys/socket.h>])
 	if test ${ac_cv_sizeof_socklen_t} -gt 0
 	then
 		AX_CHECK_SIGN([socklen_t],
@@ -341,6 +351,17 @@ else
 			[ AS_ECHO_N("") ],
 			[#include <sys/socket.h>])
 	fi
+
+	AC_CHECK_SIZEOF(sa_family_t,, [
+		#include <sys/socket.h>
+		#include <netinet/in.h>])
+	if test ${ac_cv_sizeof_sa_family_t} -gt 0
+	then
+		AX_CHECK_SIGN([sa_family_t],
+			[ AC_DEFINE(MOO_SA_FAMILY_T_IS_SIGNED, 1, [Define if sa_family_t is signed]) ],
+			[ AS_ECHO_N("") ],
+			[#include <sys/socket.h>])
+	fi
 fi
 
 dnl gcc 3.4.3 on opensolaris x86 gave this warning without -msse or 
@@ -476,6 +497,8 @@ AC_DEFINE_UNQUOTED(MOO_SIZEOF_STRUCT_SOCKADDR_LL, ${ac_cv_sizeof_struct_sockaddr
 AC_DEFINE_UNQUOTED(MOO_SIZEOF_STRUCT_SOCKADDR_UN, ${ac_cv_sizeof_struct_sockaddr_un}, [sizeof(struct sockaddr_un)])
 AC_DEFINE_UNQUOTED(MOO_SIZEOF_STRUCT_SOCKADDR_DL, ${ac_cv_sizeof_struct_sockaddr_dl}, [sizeof(struct sockaddr_dl)])
 
+AC_DEFINE_UNQUOTED(MOO_SIZEOF_SOCKLEN_T, ${ac_cv_sizeof_socklen_t}, [sizeof(socklen_t)])
+AC_DEFINE_UNQUOTED(MOO_SIZEOF_SA_FAMILY_T, ${ac_cv_sizeof_sa_family_t}, [sizeof(sa_family_t)])
 
 moo_package_version_major="`echo ${PACKAGE_VERSION} | cut -d. -f1`"
 moo_package_version_minor="`echo ${PACKAGE_VERSION} | cut -d. -f2`"
diff --git a/moo/lib/moo-cfg.h.in b/moo/lib/moo-cfg.h.in
index 63debf3..1db8551 100644
--- a/moo/lib/moo-cfg.h.in
+++ b/moo/lib/moo-cfg.h.in
@@ -413,6 +413,9 @@
 /* Patch level */
 #undef MOO_PACKAGE_VERSION_PATCH
 
+/* Define if sa_family_t is signed */
+#undef MOO_SA_FAMILY_T_IS_SIGNED
+
 /* sizeof(char) */
 #undef MOO_SIZEOF_CHAR
 
@@ -443,9 +446,15 @@
 /* sizeof(off_t) */
 #undef MOO_SIZEOF_OFF_T
 
+/* sizeof(sa_family_t) */
+#undef MOO_SIZEOF_SA_FAMILY_T
+
 /* sizeof(short) */
 #undef MOO_SIZEOF_SHORT
 
+/* sizeof(socklen_t) */
+#undef MOO_SIZEOF_SOCKLEN_T
+
 /* sizeof(struct sockaddr_dl) */
 #undef MOO_SIZEOF_STRUCT_SOCKADDR_DL
 
@@ -555,6 +564,9 @@
 /* The size of `off_t', as computed by sizeof. */
 #undef SIZEOF_OFF_T
 
+/* The size of `sa_family_t', as computed by sizeof. */
+#undef SIZEOF_SA_FAMILY_T
+
 /* The size of `short', as computed by sizeof. */
 #undef SIZEOF_SHORT
 
diff --git a/moo/mod/_sck.h b/moo/mod/_sck.h
index 00a228f..b1dfd78 100644
--- a/moo/mod/_sck.h
+++ b/moo/mod/_sck.h
@@ -38,6 +38,76 @@ struct sck_t
 	/* there are more fields in the actual object */
 };
 
+#if (MOO_SIZEOF_SOCKLEN_T > 0)
+//#error x
+#endif
+
+#if (MOO_SIZEOF_INT8_T > 0)
+#error x
+#endif
+
+#if (MOO_SIZEOF_SOCKLEN_T == 1)
+	#if defined(MOO_SOCKLEN_T_IS_SIGNED)
+		typedef moo_int8_t sck_len_t;
+	#else
+		typedef moo_uint8_t sck_len_t;
+	#endif
+#elif (MOO_SIZEOF_SOCKLEN_T == 2)
+	#if defined(MOO_SOCKLEN_T_IS_SIGNED)
+		typedef moo_int16_t sck_len_t;
+	#else
+		typedef moo_uint16_t sck_len_t;
+	#endif
+#elif (MOO_SIZEOF_SOCKLEN_T == 4)
+	#if defined(MOO_SOCKLEN_T_IS_SIGNED)
+		typedef moo_int32_t sck_len_t;
+	#else
+		typedef moo_uint32_t sck_len_t;
+	#endif
+#elif (MOO_SIZEOF_SOCKLEN_T == 8)
+	#if defined(MOO_SOCKLEN_T_IS_SIGNED)
+		typedef moo_int64_t sck_len_t;
+	#else
+		typedef moo_uint64_t sck_len_t;
+	#endif
+#else
+#	error UNSUPPORT sck_len_t size
+#endif
+
+#if (MOO_SIZEOF_SA_FAMILY_T == 1)
+	#if defined(MOO_SA_FAMILY_T_IS_SIGNED)
+		typedef moo_int8_t sck_addr_family_t;
+	#else
+		typedef moo_uint8_t sck_addr_family_t;
+	#endif
+#elif (MOO_SIZEOF_SA_FAMILY_T == 2)
+	#if defined(MOO_SA_FAMILY_T_IS_SIGNED)
+		typedef moo_int16_t sck_addr_family_t;
+	#else
+		typedef moo_uint16_t sck_addr_family_t;
+	#endif
+#elif (MOO_SIZEOF_SA_FAMILY_T == 4)
+	#if defined(MOO_SA_FAMILY_T_IS_SIGNED)
+		typedef moo_int32_t sck_addr_family_t;
+	#else
+		typedef moo_uint32_t sck_addr_family_t;
+	#endif
+#elif (MOO_SIZEOF_SA_FAMILY_T == 8)
+	#if defined(MOO_SA_FAMILY_T_IS_SIGNED)
+		typedef moo_int64_t sck_addr_family_t;
+	#else
+		typedef moo_uint64_t sck_addr_family_t;
+	#endif
+#else
+#	error UNSUPPORT sck_addr_family_t size
+#endif
+
+struct sck_addr_t
+{
+	sck_addr_family_t family;
+	moo_uint8_t data[1];
+};
+typedef struct sck_addr_t sck_addr_t;
 
 #if defined(__cplusplus)
 extern "C" {
diff --git a/moo/mod/sck-addr.c b/moo/mod/sck-addr.c
index 1648f1d..0197b1c 100644
--- a/moo/mod/sck-addr.c
+++ b/moo/mod/sck-addr.c
@@ -400,7 +400,7 @@ TODO:
 							moo_seterrbfmt (moo, MOO_EINVAL, "scope id too large");
 							return -1; /* overflow */
 						}
-						nwad->in6.sin6_scope_id= x;
+						nwad->in6.sin6_scope_id = x;
 						p++;
 					}
 					while (p < end && *p >= '0' && *p <= '9');
diff --git a/moo/mod/sck.c b/moo/mod/sck.c
index 1d335bf..50d27b6 100644
--- a/moo/mod/sck.c
+++ b/moo/mod/sck.c
@@ -143,31 +143,28 @@ static moo_pfrc_t pf_connect (moo_t* moo, moo_ooi_t nargs)
 	oop_sck_t sck;
 	int fd, oldfl, n;
 	moo_errnum_t errnum;
+	moo_oop_t arg;
 
 	sck = (oop_sck_t)MOO_STACK_GETRCV(moo, nargs);
+	arg = MOO_STACK_GETARG(moo, nargs, 1);
+
 	MOO_PF_CHECK_RCV (moo,
 		MOO_OOP_IS_POINTER(sck) &&
 		MOO_OBJ_BYTESOF(sck) >= (MOO_SIZEOF(*sck) - MOO_SIZEOF(moo_obj_t)) &&
 		MOO_OOP_IS_SMOOI(sck->handle));
+	MOO_PF_CHECK_ARGS (moo, nargs, MOO_OBJ_IS_BYTE_POINTER(arg));
 
 	fd = MOO_OOP_TO_SMOOI(sck->handle);
 
 	oldfl = fcntl(fd, F_GETFL, 0);
 	if (oldfl == -1 || fcntl(fd, F_SETFL, oldfl | O_NONBLOCK) == -1) goto oops_syserr;
 
-{
-
-struct sockaddr_in sin;
-memset (&sin, 0, sizeof(sin));
-sin.sin_family = AF_INET;
-sin.sin_addr.s_addr = inet_addr ("192.168.1.145");
-sin.sin_port = htons(12345);
 	do
 	{
-		n = connect(fd, (struct sockaddr*)&sin, sizeof(sin));
+		//n = connect(fd, (struct sockaddr*)MOO_OBJ_GET_BYTE_SLOT(arg), addrlen);
 	}
 	while (n == -1 && errno == EINTR);
-}
+
 
 	if (n == -1 && errno != EINPROGRESS)
 	{