swifty: Add SWIFT protocol number.

diff --git a/src/swift_types.h b/src/swift_types.h
index 754f6e0..88541c0 100644 (file)
--- a/src/swift_types.h
+++ b/src/swift_types.h
@@ -18,6 +18,13 @@
 extern "C" {
 #endif
 
+/*
+ * 143 is a free IP protocol number (as shown in /etc/protocols
+ * and <netinet/in.h>).
+ */
+
+#define IPPROTO_SWIFT          143
+
 /*
  * swift address
  *   - IP address (Network Layer)