add --ipv6only=no test

diff --git a/bin/tests/system/feature-test.c b/bin/tests/system/feature-test.c
index 77452cc6cccb489c58ab21f7cca1aa7d80df9fb1..8ccc8bf34b6733802ae644bacde24bdd29c9a498 100644 (file)
--- a/bin/tests/system/feature-test.c
+++ b/bin/tests/system/feature-test.c
@@ -15,6 +15,7 @@
 
 #include <isc/print.h>
 #include <isc/util.h>
+#include <isc/net.h>
 #include <dns/edns.h>
 
 #ifdef WIN32
@@ -33,15 +34,16 @@ static void
 usage() {
        fprintf(stderr, "usage: feature-test <arg>\n");
        fprintf(stderr, "args:\n");
-       fprintf(stderr, "       --enable-filter-aaaa\n");
        fprintf(stderr, "       --edns-version\n");
+       fprintf(stderr, "       --enable-filter-aaaa\n");
        fprintf(stderr, "       --gethostname\n");
        fprintf(stderr, "       --gssapi\n");
        fprintf(stderr, "       --have-dlopen\n");
        fprintf(stderr, "       --have-geoip\n");
        fprintf(stderr, "       --have-libxml2\n");
-       fprintf(stderr, "       --rpz-nsip\n");
+       fprintf(stderr, "       --ipv6only=no\n");
        fprintf(stderr, "       --rpz-nsdname\n");
+       fprintf(stderr, "       --rpz-nsip\n");
        fprintf(stderr, "       --with-idn\n");
 }
 
@@ -154,6 +156,25 @@ main(int argc, char **argv) {
 #endif
        }
 
+       if (strcmp(argv[1], "--ipv6only=no") == 0) {
+#ifdef WIN32
+               return (0);
+#elif defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
+               int s;
+               int n;
+               int v6only = -1;
+               ISC_SOCKADDR_LEN_T len = sizeof(v6only);
+
+               s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
+               n = getsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
+                              (void *)&v6only, &len);
+               close(s);
+               return ((n == 0 && v6only == 0) ? 0 : 1);
+#else
+               return (1);
+#endif
+       }
+
        fprintf(stderr, "unknown arg: %s\n", argv[1]);
        usage();
        return (1);