1 files changed, 69 insertions, 0 deletions
diff --git a/print-beep.c b/print-beep.c
new file mode 100644
index 0000000..76017ea
--- /dev/null
+++ b/print-beep.c
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2000, Richard Sharpe
+ *
+ * This software may be distributed either under the terms of the
+ * BSD-style license that accompanies tcpdump or under the GNU GPL
+ * version 2 or later.
+ *
+ * print-beep.c
+ *
+ */
+
+/* \summary: Blocks Extensible Exchange Protocol (BEEP) printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#include <string.h>
+
+#include "netdissect.h"
+
+/* Check for a string but not go beyond length
+ * Return TRUE on match, FALSE otherwise
+ *
+ * Looks at the first few chars up to tl1 ...
+ */
+
+static int
+l_strnstart(netdissect_options *ndo, const char *tstr1, u_int tl1,
+    const char *str2, u_int l2)
+{
+	if (!ND_TTEST_LEN(str2, tl1)) {
+		/*
+		 * We don't have tl1 bytes worth of captured data
+		 * for the string, so we can't check for this
+		 * string.
+		 */
+		return 0;
+	}
+	if (tl1 > l2)
+		return 0;
+
+	return (strncmp(tstr1, str2, tl1) == 0 ? 1 : 0);
+}
+
+void
+beep_print(netdissect_options *ndo, const u_char *bp, u_int length)
+{
+
+	ndo->ndo_protocol = "beep";
+	if (l_strnstart(ndo, "MSG", 4, (const char *)bp, length)) /* A REQuest */
+		ND_PRINT(" BEEP MSG");
+	else if (l_strnstart(ndo, "RPY ", 4, (const char *)bp, length))
+		ND_PRINT(" BEEP RPY");
+	else if (l_strnstart(ndo, "ERR ", 4, (const char *)bp, length))
+		ND_PRINT(" BEEP ERR");
+	else if (l_strnstart(ndo, "ANS ", 4, (const char *)bp, length))
+		ND_PRINT(" BEEP ANS");
+	else if (l_strnstart(ndo, "NUL ", 4, (const char *)bp, length))
+		ND_PRINT(" BEEP NUL");
+	else if (l_strnstart(ndo, "SEQ ", 4, (const char *)bp, length))
+		ND_PRINT(" BEEP SEQ");
+	else if (l_strnstart(ndo, "END", 4, (const char *)bp, length))
+		ND_PRINT(" BEEP END");
+	else
+		ND_PRINT(" BEEP (payload or undecoded)");
+}