1 files changed, 46 insertions, 0 deletions
diff --git a/contrib/ipfilter/lib/getport.c b/contrib/ipfilter/lib/getport.c
new file mode 100644
index 0000000..7cf903d
--- /dev/null
+++ b/contrib/ipfilter/lib/getport.c
@@ -0,0 +1,46 @@
+/*	$NetBSD$	*/
+
+#include "ipf.h"
+
+int getport(fr, name, port)
+frentry_t *fr;
+char *name;
+u_short *port;
+{
+	struct protoent *p;
+	struct servent *s;
+	u_short p1;
+
+	if (fr == NULL || fr->fr_type != FR_T_IPF) {
+		s = getservbyname(name, NULL);
+		if (s != NULL) {
+			*port = s->s_port;
+			return 0;
+		}
+		return -1;
+	}
+
+	if ((fr->fr_flx & FI_TCPUDP) != 0) {
+		/*
+		 * If a rule is "tcp/udp" then check that both TCP and UDP
+		 * mappings for this protocol name match ports.
+		 */
+		s = getservbyname(name, "tcp");
+		if (s == NULL)
+			return -1;
+		p1 = s->s_port;
+		s = getservbyname(name, "udp");
+		if (s == NULL || s->s_port != p1)
+			return -1;
+		*port = p1;
+		return 0;
+	}
+
+	p = getprotobynumber(fr->fr_proto);
+	s = getservbyname(name, p ? p->p_name : NULL);
+	if (s != NULL) {
+		*port = s->s_port;
+		return 0;
+	}
+	return -1;
+}