Add httpd-utils

utils/httpd/ip.c

@@ -0,0 +1,31 @@
+/*
+ * httpd-utils
+ * Written in 2020 by Lucas
+ * CC0 1.0 Universal/Public domain - No rights reserved
+ *
+ * To the extent possible under law, the author(s) have dedicated all
+ * copyright and related and neighboring rights to this software to the
+ * public domain worldwide. This software is distributed without any
+ * warranty. You should have received a copy of the CC0 Public Domain
+ * Dedication along with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+main(void)
+{
+	char *ip;
+
+	ip = getenv("HTTP_X_FORWARDED_FOR");
+	if (ip == NULL)
+		ip = getenv("REMOTE_ADDR");
+	if (ip == NULL)
+		ip = "unknown";
+
+	printf("Content-type: text/plain\n\n%s\n", ip);
+
+	return 0;
+}