1 files changed, 46 insertions, 0 deletions
diff --git a/sbin/ipf/libipf/tcp_flags.c b/sbin/ipf/libipf/tcp_flags.c
new file mode 100644
index 000000000000..9247933ee85b
--- /dev/null
+++ b/sbin/ipf/libipf/tcp_flags.c
@@ -0,0 +1,46 @@
+
+/*
+ * Copyright (C) 2000-2004 by Darren Reed.
+ *
+ * See the IPFILTER.LICENCE file for details on licencing.
+ *
+ * $Id: tcp_flags.c,v 1.8.2.1 2006/06/16 17:21:17 darrenr Exp $
+ */
+
+#include "ipf.h"
+
+extern	char	 flagset[];
+extern	uint16_t flags[];
+
+
+uint16_t tcp_flags(char *flgs, uint16_t *mask, int linenum)
+{
+	uint16_t tcpf = 0, tcpfm = 0;
+	char *s;
+
+	s = strchr(flgs, '/');
+	if (s)
+		*s++ = '\0';
+
+	if (*flgs == '0') {
+		tcpf = strtol(flgs, NULL, 0);
+	} else {
+		tcpf = tcpflags(flgs);
+	}
+
+	if (s != NULL) {
+		if (*s == '0')
+			tcpfm = strtol(s, NULL, 0);
+		else
+			tcpfm = tcpflags(s);
+	}
+
+	if (!tcpfm) {
+		if (tcpf == TH_SYN)
+			tcpfm = TH_FLAGS & ~(TH_ECN|TH_CWR);
+		else
+			tcpfm = TH_FLAGS & ~(TH_ECN);
+	}
+	*mask = tcpfm;
+	return (tcpf);
+}