Asterisk is getting a "No D-channels available!" warning message every 4 seconds.

Asterisk is just whining too much with this message: "No D-channels
available!  Using Primary channel XXX as D-channel anyway!".

Filtered the message so it only comes out once if there is no D channel
available without an intervening D channel available period.

(closes issue #17270)
Reported by: jmls


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@294821 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_dahdi.c

@@ -348,6 +348,8 @@ struct dahdi_pri {
 #ifdef HAVE_PRI_INBANDDISCONNECT
 	unsigned int inbanddisconnect:1;				/*!< Should we support inband audio after receiving DISCONNECT? */
 #endif
+	/*! TRUE if we have already whined about no D channels available. */
+	unsigned int no_d_channels:1;
 	time_t lastreset;						/*!< time when unused channels were last reset */
 	long resetinterval;						/*!< Interval (in seconds) for resetting unused channels */
 	struct dahdi_pvt *pvts[MAX_CHANNELS];				/*!< Member channel pvt structs */
@@ -2820,8 +2822,14 @@ static int pri_find_dchan(struct dahdi_pri *pri)
 	}
 	if (newslot < 0) {
 		newslot = 0;
-		ast_log(LOG_WARNING, "No D-channels available!  Using Primary channel %d as D-channel anyway!\n",
-			pri->dchannels[newslot]);
+		if (!pri->no_d_channels) {
+			pri->no_d_channels = 1;
+			ast_log(LOG_WARNING,
+				"No D-channels available!  Using Primary channel %d as D-channel anyway!\n",
+				pri->dchannels[newslot]);
+		}
+	} else {
+		pri->no_d_channels = 0;
 	}
 	if (old && (oldslot != newslot))
 		ast_log(LOG_NOTICE, "Switching from from d-channel %d to channel %d!\n",
@@ -9395,6 +9403,7 @@ static void *pri_dchannel(void *vpri)
 
 			switch (e->e) {
 			case PRI_EVENT_DCHAN_UP:
+				pri->no_d_channels = 0;
 				if (!pri->pri) pri_find_dchan(pri);
 
 				/* Note presense of D-channel */