1 files changed, 20 insertions, 0 deletions
diff --git a/test/ipver.c b/test/ipver.c
new file mode 100644
index 0000000..1007d8d
--- /dev/null
+++ b/test/ipver.c
@@ -0,0 +1,20 @@
+#include <arpa/inet.h>
+#include <stdio.h>
+
+static int ip_version(const char *src) {
+    char buf[INET6_ADDRSTRLEN];
+    if (inet_pton(AF_INET, src, buf)) {
+        return 4;
+    } else if (inet_pton(AF_INET6, src, buf)) {
+        return 6;
+    }
+    return -1;
+}
+
+int main(int argc, char *argv[]) {
+    for (int i = 1; i < argc; ++i) {
+        printf("%s\t%d\n", argv[i], ip_version(argv[i]));
+    }
+
+    return 0;
+}