Fix IPv6 detection and IPv6 to 4 conversion to use only standard

interfaces.

configure

@@ -10027,16 +10027,16 @@ fi
 echo "$as_me:$LINENO: result: $ac_cv_func_getaddrinfo" >&5
 echo "${ECHO_T}$ac_cv_func_getaddrinfo" >&6
 if test $ac_cv_func_getaddrinfo = yes; then
-  echo "$as_me:$LINENO: checking for struct sockaddr_in6.sin6_len" >&5
-echo $ECHO_N "checking for struct sockaddr_in6.sin6_len... $ECHO_C" >&6
-if test "${ac_cv_member_struct_sockaddr_in6_sin6_len+set}" = set; then
+  echo "$as_me:$LINENO: checking for struct sockaddr_in6" >&5
+echo $ECHO_N "checking for struct sockaddr_in6... $ECHO_C" >&6
+if test "${ac_cv_type_struct_sockaddr_in6+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
   cat >conftest.$ac_ext <<_ACEOF
 #line $LINENO "configure"
 #include "confdefs.h"
-#include <sys/socket.h>
-#include <netdb.h>
+$ac_includes_default
+#include <netinet/in.h>
 
 #ifdef F77_DUMMY_MAIN
 #  ifdef __cplusplus
@@ -10047,9 +10047,10 @@ else
 int
 main ()
 {
-static struct sockaddr_in6 ac_aggr;
-if (ac_aggr.sin6_len)
-return 0;
+if ((struct sockaddr_in6 *) 0)
+  return 0;
+if (sizeof (struct sockaddr_in6))
+  return 0;
   ;
   return 0;
 }
@@ -10066,23 +10067,18 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   ac_status=$?
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
   (exit $ac_status); }; }; then
-  ac_cv_member_struct_sockaddr_in6_sin6_len=yes
+  ac_cv_type_struct_sockaddr_in6=yes
 else
   echo "$as_me: failed program was:" >&5
 cat conftest.$ac_ext >&5
-ac_cv_member_struct_sockaddr_in6_sin6_len=no
+ac_cv_type_struct_sockaddr_in6=no
 fi
 rm -f conftest.$ac_objext conftest.$ac_ext
 fi
-echo "$as_me:$LINENO: result: $ac_cv_member_struct_sockaddr_in6_sin6_len" >&5
-echo "${ECHO_T}$ac_cv_member_struct_sockaddr_in6_sin6_len" >&6
-if test $ac_cv_member_struct_sockaddr_in6_sin6_len = yes; then
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_SOCKADDR_IN6_SIN6_LEN 1
-_ACEOF
-
-HAVE_IPV6="yes"; cat >>confdefs.h <<\_ACEOF
+echo "$as_me:$LINENO: result: $ac_cv_type_struct_sockaddr_in6" >&5
+echo "${ECHO_T}$ac_cv_type_struct_sockaddr_in6" >&6
+if test $ac_cv_type_struct_sockaddr_in6 = yes; then
+  HAVE_IPV6="yes"; cat >>confdefs.h <<\_ACEOF
 #define HAVE_IPV6 1
 _ACEOF
 

configure.in

 dnl Process this file with autoconf to produce a configure script.
-dnl $Header: /cvsroot/pgsql/configure.in,v 1.230 2003/01/07 06:43:20 momjian Exp $
+dnl $Header: /cvsroot/pgsql/configure.in,v 1.231 2003/01/09 14:34:53 petere Exp $
 dnl
 dnl Developers, please strive to achieve this order:
 dnl
@@ -788,11 +788,11 @@ AC_CHECK_DECLS(fdatasync, [], [], [#include <unistd.h>])
 
 # This exports HAVE_IPV6 to both C files and Makefiles
 AC_CHECK_FUNC(getaddrinfo,
-             [AC_CHECK_MEMBERS(struct sockaddr_in6.sin6_len,
-             [HAVE_IPV6="yes"; AC_DEFINE(HAVE_IPV6, 1, [])], [],
-[#include <sys/socket.h>
-#include <netdb.h>])],
-	     [])
+             [AC_CHECK_TYPE(struct sockaddr_in6,
+                            [HAVE_IPV6="yes"; AC_DEFINE(HAVE_IPV6, 1)],
+                            [],
+[$ac_includes_default
+#include <netinet/in.h>])])
 AC_SUBST(HAVE_IPV6)
 
 AC_CACHE_CHECK([for PS_STRINGS], [pgac_cv_var_PS_STRINGS],

src/backend/libpq/ip.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/libpq/ip.c,v 1.1 2003/01/06 03:18:26 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/libpq/ip.c,v 1.2 2003/01/09 14:35:03 petere Exp $
  *
  * This file and the IPV6 implementation were initially provided by
  * Nigel Kukard <nkukard@lbsd.net>, Linux Based Systems Design
@@ -365,7 +365,11 @@ convSockAddr6to4(const SockAddr *src, SockAddr *dst)
 	dst->in.sin_family = AF_INET;
 	dst->in.sin_port = src->in6.sin6_port;
 
-	dst->in.sin_addr.s_addr = src->in6.sin6_addr.s6_addr32[3];
+	dst->in.sin_addr.s_addr =
+		(src->in6.sin6_addr.s6_addr[15])
+		+ (src->in6.sin6_addr.s6_addr[14] << 8)
+		+ (src->in6.sin6_addr.s6_addr[13] << 16)
+		+ (src->in6.sin6_addr.s6_addr[12] << 24);
 	SockAddr_ntop(src, addr_str, INET6_ADDRSTRLEN, 0);
 }
 #endif