1 files changed, 41 insertions, 0 deletions
diff --git a/contrib/ipfilter/lib/getproto.c b/contrib/ipfilter/lib/getproto.c
new file mode 100644
index 0000000..6c52cd3
--- /dev/null
+++ b/contrib/ipfilter/lib/getproto.c
@@ -0,0 +1,41 @@
+/*	$FreeBSD$	*/
+
+/*
+ * Copyright (C) 2012 by Darren Reed.
+ *
+ * See the IPFILTER.LICENCE file for details on licencing.
+ *
+ * $Id$
+ */
+
+#include "ipf.h"
+#include <ctype.h>
+
+int getproto(name)
+	char *name;
+{
+	struct protoent *p;
+	char *s;
+
+	for (s = name; *s != '\0'; s++)
+		if (!ISDIGIT(*s))
+			break;
+	if (*s == '\0')
+		return atoi(name);
+
+#ifdef _AIX51
+	/*
+	 * For some bogus reason, "ip" is 252 in /etc/protocols on AIX 5
+	 * The IANA has doubled up on the definition of 0 - it is now also
+	 * used for IPv6 hop-opts, so we can no longer rely on /etc/protocols
+	 * providing the correct name->number mapping
+	 */
+#endif
+	if (!strcasecmp(name, "ip"))
+		return 0;
+
+	p = getprotobyname(name);
+	if (p != NULL)
+		return p->p_proto;
+	return -1;
+}