diff options
Diffstat (limited to 'ares')
| -rw-r--r-- | ares/m4/cares-functions.m4 | 147 |
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 ]) |