1 files changed, 64 insertions, 0 deletions
diff --git a/contrib/ipfilter/lib/portnum.c b/contrib/ipfilter/lib/portnum.c
new file mode 100644
index 0000000..284bbc9
--- /dev/null
+++ b/contrib/ipfilter/lib/portnum.c
@@ -0,0 +1,64 @@
+/*	$NetBSD$	*/
+
+/*
+ * Copyright (C) 1993-2001 by Darren Reed.
+ *
+ * See the IPFILTER.LICENCE file for details on licencing.
+ *
+ *
+ * Id: portnum.c,v 1.6.4.1 2004/12/09 19:41:22 darrenr Exp
+ */
+
+#include <ctype.h>
+
+#include "ipf.h"
+
+
+/*
+ * find the port number given by the name, either from getservbyname() or
+ * straight atoi(). Return 1 on success, 0 on failure
+ */
+int	portnum(name, proto, port, linenum)
+char	*name, *proto;
+u_short	*port;
+int     linenum;
+{
+	struct	servent	*sp, *sp2;
+	u_short	p1 = 0;
+	int i;
+
+	if (ISDIGIT(*name)) {
+		if (ratoi(name, &i, 0, USHRT_MAX)) {
+			*port = (u_short)i;
+			return 1;
+		}
+		fprintf(stderr, "%d: unknown port \"%s\"\n", linenum, name);
+		return 0;
+	}
+	if (proto != NULL && strcasecmp(proto, "tcp/udp") != 0) {
+		sp = getservbyname(name, proto);
+		if (sp) {
+			*port = ntohs(sp->s_port);
+			return 1;
+		}
+		fprintf(stderr, "%d: unknown service \"%s\".\n", linenum, name);
+		return 0;
+	}
+	sp = getservbyname(name, "tcp");
+	if (sp)
+		p1 = sp->s_port;
+	sp2 = getservbyname(name, "udp");
+	if (!sp || !sp2) {
+		fprintf(stderr, "%d: unknown tcp/udp service \"%s\".\n",
+			linenum, name);
+		return 0;
+	}
+	if (p1 != sp2->s_port) {
+		fprintf(stderr, "%d: %s %d/tcp is a different port to ",
+			linenum, name, p1);
+		fprintf(stderr, "%d: %s %d/udp\n", linenum, name, sp->s_port);
+		return 0;
+	}
+	*port = ntohs(p1);
+	return 1;
+}