remove verification of the freeability of the addrinfo struct pointer members

1 files changed, 0 insertions, 147 deletions

diff --git a/ares/m4/cares-functions.m4 b/ares/m4/cares-functions.m4
index 3a9a04fcf..250b5451f 100644
--- a/ares/m4/cares-functions.m4
+++ b/ares/m4/cares-functions.m4
@@ -243,7 +243,6 @@ AC_DEFUN([CARES_CHECK_FUNC_GETADDRINFO], [
   AC_REQUIRE([CARES_INCLUDES_STDLIB])dnl
   AC_REQUIRE([CARES_INCLUDES_SYS_SOCKET])dnl
   AC_REQUIRE([CARES_INCLUDES_NETDB])dnl
-  AC_REQUIRE([CARES_INCLUDES_STRING])dnl
   #
   tst_links_getaddrinfo="unknown"
   tst_proto_getaddrinfo="unknown"
@@ -364,152 +363,6 @@ AC_DEFUN([CARES_CHECK_FUNC_GETADDRINFO], [
     AC_MSG_RESULT([no])
     ac_cv_func_getaddrinfo="no"
   fi
-  #
-  if test "$ac_cv_func_getaddrinfo" = "yes"; then
-    DO_CARES_CHECK_FUNC_GETADDRINFO_UNFREEABLE_AI_ADDR
-    DO_CARES_CHECK_FUNC_GETADDRINFO_UNFREEABLE_AI_CANONNAME
-  fi
-])
-
-
-dnl DO_CARES_CHECK_FUNC_GETADDRINFO_UNFREEABLE_AI_ADDR
-dnl -------------------------------------------------
-dnl verify if the ai_addr pointer member of the addrinfo
-dnl struct returned by function getaddrinfo is a pointer
-dnl which can actually be free()ed or not. This is an
-dnl internal macro used by CARES_CHECK_FUNC_GETADDRINFO
-
-AC_DEFUN([DO_CARES_CHECK_FUNC_GETADDRINFO_UNFREEABLE_AI_ADDR], [
-  AC_MSG_CHECKING([if getaddrinfo returns unfreeable ai_addr])
-  dnl only do runtime verification when not cross-compiling
-  if test "x$cross_compiling" != "xyes"; then
-    AC_RUN_IFELSE([
-      AC_LANG_PROGRAM([[
-        $cares_includes_ws2tcpip
-        $cares_includes_stdlib
-        $cares_includes_sys_socket
-        $cares_includes_netdb
-        $cares_includes_string
-      ]],[[
-        struct sockaddr tmp_addr, *ai_addr, *freed_ptr;
-        struct addrinfo hints;
-        struct addrinfo *ai = 0;
-        int error;
-
-        memset(&hints, 0, sizeof(hints));
-        hints.ai_flags = AI_NUMERICHOST;
-        hints.ai_family = AF_UNSPEC;
-        hints.ai_socktype = SOCK_STREAM;
-        error = getaddrinfo("127.0.0.1", 0, &hints, &ai);
-        if(error || !ai)
-          /* should not happen, same test already succeeded, */
-          /* assume that returned ai_addr is not unfreeable. */
-          exit(0);
-
-        memset(&tmp_addr, 1, sizeof(tmp_addr));
-        /* attempt to free ai_addr pointer */
-        freed_ptr = ai_addr = ai->ai_addr;
-        /* seg-faulting when free'ing an unfreeable ptr would be nice    */
-        /* and desired here, if this happens exit code will be non-zero. */
-        free(ai_addr);
-        /* attempt to write free'ed memory */
-        freed_ptr->sa_family = 'x';
-        /* attempt to reuse and clear free'ed memory */
-        ai_addr = calloc(1, sizeof(struct sockaddr));
-        /* attempt to read free'ed memory */
-        tmp_addr = *freed_ptr;
-        /* verify if everything has worked */
-        if(tmp_addr.sa_family == 'x')
-          /* ai_addr might be unfreeable, ouch! */
-          exit(1);
-        else
-          /* ai_addr is certainly freeable */
-          exit(0);
-      ]])
-    ],[
-      dnl exit code was zero, getaddrinfo behaves nicely.
-      AC_MSG_RESULT([no])
-    ],[
-      dnl exit code wasn't zero, getaddrinfo returns unfreeable member ptr.
-      AC_MSG_RESULT([yes])
-      AC_DEFINE_UNQUOTED(HAVE_GETADDRINFO_UNFREEABLE_AI_ADDR, 1,
-        [Define to 1 if getaddrinfo returns unfreeable ai_addr pointer.])
-    ])
-  else
-    dnl for cross-compiling a static check would be nice.
-    AC_MSG_RESULT([unknown])
-  fi
-])
-
-
-dnl DO_CARES_CHECK_FUNC_GETADDRINFO_UNFREEABLE_AI_CANONNAME
-dnl -------------------------------------------------
-dnl verify if the ai_canonname pointer member of the addrinfo
-dnl struct returned by function getaddrinfo is a pointer
-dnl which can actually be free()ed or not. This is an
-dnl internal macro used by CARES_CHECK_FUNC_GETADDRINFO
-
-AC_DEFUN([DO_CARES_CHECK_FUNC_GETADDRINFO_UNFREEABLE_AI_CANONNAME], [
-  AC_MSG_CHECKING([if getaddrinfo returns unfreeable ai_canonname])
-  dnl only do runtime verification when not cross-compiling
-  if test "x$cross_compiling" != "xyes"; then
-    AC_RUN_IFELSE([
-      AC_LANG_PROGRAM([[
-        $cares_includes_ws2tcpip
-        $cares_includes_stdlib
-        $cares_includes_sys_socket
-        $cares_includes_netdb
-        $cares_includes_string
-      ]],[[
-        char tmp_canonname[80];
-        char *ai_canonname, *freed_ptr;
-        struct addrinfo hints;
-        struct addrinfo *ai = 0;
-        int error;
-
-        memset(&hints, 0, sizeof(hints));
-        hints.ai_flags = AI_NUMERICHOST|AI_CANONNAME;
-        hints.ai_family = AF_UNSPEC;
-        hints.ai_socktype = SOCK_STREAM;
-        error = getaddrinfo("127.0.0.1", 0, &hints, &ai);
-        if(error || !ai)
-          /* should not happen, same test already succeeded,   */
-          /* assume that returned ai_canonname not unfreeable. */
-          exit(0);
-
-        memset(&tmp_canonname, 1, sizeof(tmp_canonname));
-        /* attempt to free ai_canonname pointer */
-        freed_ptr = ai_canonname = ai->ai_canonname;
-        /* seg-faulting when free'ing an unfreeable ptr would be nice    */
-        /* and desired here, if this happens exit code will be non-zero. */
-        free(ai_canonname);
-        /* attempt to write free'ed memory */
-        freed_ptr[0] = 'x';
-        /* attempt to reuse and clear free'ed memory */
-        ai_canonname = calloc(1, sizeof(tmp_canonname));
-        /* attempt to read free'ed memory */
-        tmp_canonname[0] = freed_ptr[0];
-        /* verify if everything has worked */
-        if(tmp_canonname[0] == 'x')
-          /* ai_canonname might be unfreeable, ouch! */
-          exit(1);
-        else
-          /* ai_canonname is certainly freeable */
-          exit(0);
-      ]])
-    ],[
-      dnl exit code was zero, getaddrinfo behaves nicely.
-      AC_MSG_RESULT([no])
-    ],[
-      dnl exit code wasn't zero, getaddrinfo returns unfreeable member ptr.
-      AC_MSG_RESULT([yes])
-      AC_DEFINE_UNQUOTED(HAVE_GETADDRINFO_UNFREEABLE_AI_CANONNAME, 1,
-        [Define to 1 if getaddrinfo returns unfreeable ai_canonname pointer.])
-    ])
-  else
-    dnl for cross-compiling a static check would be nice.
-    AC_MSG_RESULT([unknown])
-  fi
 ])