Import ax25-apps 0.0.1 from tarballax25-apps-0.0.1

1 files changed, 44 insertions, 0 deletions

diff --git a/listen/udpdump.c b/listen/udpdump.c
new file mode 100644
index 0000000..7b1c184
--- /dev/null
+++ b/listen/udpdump.c
@@ -0,0 +1,44 @@
+/* @(#) $Header: udpdump.c,v 1.5 91/05/09 07:39:11 deyke Exp $ */
+
+/* UDP packet tracing
+ * Copyright 1991 Phil Karn, KA9Q
+ */
+#include <stdio.h>
+#include "listen.h"
+
+#define	RIP_PORT	520
+
+#define	UDPHDR		8
+
+/* Dump a UDP header */
+void udp_dump(unsigned char *data, int length, int hexdump)
+{
+	int hdr_length;
+	int source;
+	int dest;
+
+	hdr_length = get16(data + 4);
+	source     = get16(data + 0);
+	dest       = get16(data + 2);
+
+	lprintf(T_PROTOCOL, "UDP:");
+
+	lprintf(T_TCPHDR, " len %d %s->", hdr_length, servname(source, "udp"));
+	lprintf(T_TCPHDR, "%s", servname(dest, "udp"));
+	
+	if (hdr_length > UDPHDR) {
+		length -= UDPHDR;
+		data   += UDPHDR;
+	
+		switch (dest) {
+			case RIP_PORT:
+				lprintf(T_TCPHDR, "\n");
+				rip_dump(data, length);
+				break;
+			default:
+				lprintf(T_TCPHDR, " Data %d\n", length);
+				data_dump(data, length, hexdump);
+				break;
+		}
+	}
+}