From 92efe8c112f273e468aa74b354a776410bea0945 Mon Sep 17 00:00:00 2001
From: "Eric S. Raymond" <esr@thyrsus.com>
Date: Mon, 21 Oct 2013 17:42:45 -0400
Subject: Ignore (but log) "Secure SIS" channel C messages.

---
 drivers.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'drivers.c')

diff --git a/drivers.c b/drivers.c
index 3de65bda..031e0ec7 100644
--- a/drivers.c
+++ b/drivers.c
@@ -1233,6 +1233,10 @@ static bool aivdm_decode(const char *buf, size_t buflen,
 	ais_context = &session->driver.aivdm.context[1];
 	session->driver.aivdm.ais_channel ='B';
 	break;
+    case 'C':
+        gpsd_report(session->context->debug, LOG_INF,
+                    "ignoring AIS channel C (secure AIS).\n");
+        return false;
     default:
 	gpsd_report(session->context->debug, LOG_ERROR,
 		    "invalid AIS channel 0x%0X .\n", field[4][0]);
-- 
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