1 files changed, 79 insertions, 0 deletions
diff --git a/lib/ports.c b/lib/ports.c
new file mode 100644
index 0000000..9a44e2c
--- /dev/null
+++ b/lib/ports.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 1993-2001 by Darren Reed.
+ *
+ * See the IPFILTER.LICENCE file for details on licencing.
+ *
+ * $Id: ports.c,v 1.9.4.1 2004/12/09 19:41:22 darrenr Exp $
+ */
+
+#include <ctype.h>
+
+#include "ipf.h"
+
+
+/*
+ * check for possible presence of the port fields in the line
+ */
+int	ports(seg, proto, pp, cp, tp, linenum)
+char	***seg;
+char	*proto;
+u_short	*pp;
+int	*cp;
+u_short	*tp;
+int     linenum;
+{
+	int	comp = -1;
+
+	if (!*seg || !**seg || !***seg)
+		return 0;
+	if (!strcasecmp(**seg, "port") && *(*seg + 1) && *(*seg + 2)) {
+		(*seg)++;
+		if (ISALNUM(***seg) && *(*seg + 2)) {
+			if (portnum(**seg, proto, pp, linenum) == 0)
+				return -1;
+			(*seg)++;
+			if (!strcmp(**seg, "<>"))
+				comp = FR_OUTRANGE;
+			else if (!strcmp(**seg, "><"))
+				comp = FR_INRANGE;
+			else {
+				fprintf(stderr,
+					"%d: unknown range operator (%s)\n",
+					linenum, **seg);
+				return -1;
+			}
+			(*seg)++;
+			if (**seg == NULL) {
+				fprintf(stderr, "%d: missing 2nd port value\n",
+					linenum);
+				return -1;
+			}
+			if (portnum(**seg, proto, tp, linenum) == 0)
+				return -1;
+		} else if (!strcmp(**seg, "=") || !strcasecmp(**seg, "eq"))
+			comp = FR_EQUAL;
+		else if (!strcmp(**seg, "!=") || !strcasecmp(**seg, "ne"))
+			comp = FR_NEQUAL;
+		else if (!strcmp(**seg, "<") || !strcasecmp(**seg, "lt"))
+			comp = FR_LESST;
+		else if (!strcmp(**seg, ">") || !strcasecmp(**seg, "gt"))
+			comp = FR_GREATERT;
+		else if (!strcmp(**seg, "<=") || !strcasecmp(**seg, "le"))
+			comp = FR_LESSTE;
+		else if (!strcmp(**seg, ">=") || !strcasecmp(**seg, "ge"))
+			comp = FR_GREATERTE;
+		else {
+			fprintf(stderr, "%d: unknown comparator (%s)\n",
+					linenum, **seg);
+			return -1;
+		}
+		if (comp != FR_OUTRANGE && comp != FR_INRANGE) {
+			(*seg)++;
+			if (portnum(**seg, proto, pp, linenum) == 0)
+				return -1;
+		}
+		*cp = comp;
+		(*seg)++;
+	}
+	return 0;
+}