diff options
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/cares-functions.m4 | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/m4/cares-functions.m4 b/m4/cares-functions.m4 index bdec24b..520e99a 100644 --- a/m4/cares-functions.m4 +++ b/m4/cares-functions.m4 @@ -552,6 +552,167 @@ AC_DEFUN([CARES_CHECK_FUNC_INET_NTOP], [ ]) +dnl CARES_CHECK_FUNC_INET_PTON +dnl ------------------------------------------------- +dnl Verify if inet_pton is available, prototyped, can +dnl be compiled and seems to work. If all of these are +dnl true, and usage has not been previously disallowed +dnl with shell variable cares_disallow_inet_pton, then +dnl HAVE_INET_PTON will be defined. + +AC_DEFUN([CARES_CHECK_FUNC_INET_PTON], [ + AC_REQUIRE([CARES_INCLUDES_ARPA_INET])dnl + AC_REQUIRE([CARES_INCLUDES_STRING])dnl + # + tst_links_inet_pton="unknown" + tst_proto_inet_pton="unknown" + tst_compi_inet_pton="unknown" + tst_works_inet_pton="unknown" + tst_allow_inet_pton="unknown" + # + AC_MSG_CHECKING([if inet_pton can be linked]) + AC_LINK_IFELSE([ + AC_LANG_FUNC_LINK_TRY([inet_pton]) + ],[ + AC_MSG_RESULT([yes]) + tst_links_inet_pton="yes" + ],[ + AC_MSG_RESULT([no]) + tst_links_inet_pton="no" + ]) + # + if test "$tst_links_inet_pton" = "yes"; then + AC_MSG_CHECKING([if inet_pton is prototyped]) + AC_EGREP_CPP([inet_pton],[ + $cares_includes_arpa_inet + ],[ + AC_MSG_RESULT([yes]) + tst_proto_inet_pton="yes" + ],[ + AC_MSG_RESULT([no]) + tst_proto_inet_pton="no" + ]) + fi + # + if test "$tst_proto_inet_pton" = "yes"; then + AC_MSG_CHECKING([if inet_pton is compilable]) + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM([[ + $cares_includes_arpa_inet + ]],[[ + if(0 != inet_pton(0, 0, 0)) + return 1; + ]]) + ],[ + AC_MSG_RESULT([yes]) + tst_compi_inet_pton="yes" + ],[ + AC_MSG_RESULT([no]) + tst_compi_inet_pton="no" + ]) + fi + # + dnl only do runtime verification when not cross-compiling + if test "x$cross_compiling" != "xyes" && + test "$tst_compi_inet_pton" = "yes"; then + AC_MSG_CHECKING([if inet_pton seems to work]) + AC_RUN_IFELSE([ + AC_LANG_PROGRAM([[ + $cares_includes_arpa_inet + $cares_includes_string + ]],[[ + unsigned char ipv6a[26]; + unsigned char ipv4a[5]; + const char *ipv6src = "fe80::214:4fff:fe0b:76c8"; + const char *ipv4src = "192.168.100.1"; + /* - */ + memset(ipv4a, 1, sizeof(ipv4a)); + if(1 != inet_pton(AF_INET, ipv4src, ipv4a)) + exit(1); /* fail */ + /* - */ + if( (ipv4a[0] != 0xc0) || + (ipv4a[1] != 0xa8) || + (ipv4a[2] != 0x64) || + (ipv4a[3] != 0x01) || + (ipv4a[4] != 0x01) ) + exit(1); /* fail */ + /* - */ + memset(ipv6a, 1, sizeof(ipv6a)); + if(1 != inet_pton(AF_INET6, ipv6src, ipv6a)) + exit(1); /* fail */ + /* - */ + ipv6res[0] = '\0'; + memset(ipv6a, 0, sizeof(ipv6a)); + if( (ipv6a[0] != 0xfe) || + (ipv6a[1] != 0x80) || + (ipv6a[8] != 0x02) || + (ipv6a[9] != 0x14) || + (ipv6a[10] != 0x4f) || + (ipv6a[11] != 0xff) || + (ipv6a[12] != 0xfe) || + (ipv6a[13] != 0x0b) || + (ipv6a[14] != 0x76) || + (ipv6a[15] != 0xc8) || + (ipv6a[25] != 0x01) ) + exit(1); /* fail */ + /* - */ + if( (ipv6a[2] != 0x0) || + (ipv6a[3] != 0x0) || + (ipv6a[4] != 0x0) || + (ipv6a[5] != 0x0) || + (ipv6a[6] != 0x0) || + (ipv6a[7] != 0x0) || + (ipv6a[16] != 0x0) || + (ipv6a[17] != 0x0) || + (ipv6a[18] != 0x0) || + (ipv6a[19] != 0x0) || + (ipv6a[20] != 0x0) || + (ipv6a[21] != 0x0) || + (ipv6a[22] != 0x0) || + (ipv6a[23] != 0x0) || + (ipv6a[24] != 0x0) ) + exit(1); /* fail */ + /* - */ + exit(0); + ]]) + ],[ + AC_MSG_RESULT([yes]) + tst_works_inet_pton="yes" + ],[ + AC_MSG_RESULT([no]) + tst_works_inet_pton="no" + ]) + fi + # + if test "$tst_compi_inet_pton" = "yes" && + test "$tst_works_inet_pton" != "no"; then + AC_MSG_CHECKING([if inet_pton usage allowed]) + if test "x$cares_disallow_inet_pton" != "xyes"; then + AC_MSG_RESULT([yes]) + tst_allow_inet_pton="yes" + else + AC_MSG_RESULT([no]) + tst_allow_inet_pton="no" + fi + fi + # + AC_MSG_CHECKING([if inet_pton might be used]) + if test "$tst_links_inet_pton" = "yes" && + test "$tst_proto_inet_pton" = "yes" && + test "$tst_compi_inet_pton" = "yes" && + test "$tst_allow_inet_pton" = "yes" && + test "$tst_works_inet_pton" != "no"; then + AC_MSG_RESULT([yes]) + AC_DEFINE_UNQUOTED(HAVE_INET_PTON, 1, + [Define to 1 if you have a IPv6 capable working inet_pton function.]) + ac_cv_func_inet_pton="yes" + else + AC_MSG_RESULT([no]) + ac_cv_func_inet_pton="no" + fi +]) + + dnl CARES_CHECK_FUNC_STRCASECMP dnl ------------------------------------------------- dnl Verify if strcasecmp is available, prototyped, and |