1 files changed, 48 insertions, 0 deletions
diff --git a/lib/tcp_flags.c b/lib/tcp_flags.c
new file mode 100644
index 0000000..67b7dad
--- /dev/null
+++ b/lib/tcp_flags.c
@@ -0,0 +1,48 @@
+/*
+ * 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	u_char	flags[];
+
+
+u_char tcp_flags(flgs, mask, linenum)
+char *flgs;
+u_char *mask;
+int    linenum;
+{
+	u_char 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 = 0xff & ~(TH_ECN|TH_CWR);
+		else
+			tcpfm = 0xff & ~(TH_ECN);
+	}
+	*mask = tcpfm;
+	return tcpf;
+}