Add signalling freeze/unfreeze ioctl (and get)

git-svn-id: http://svn.digium.com/svn/zaptel/trunk@427 5390a7c7-147a-4af0-8ec9-7488f05a26cb

2 files changed, 32 insertions, 2 deletions

diff --git a/zaptel.c b/zaptel.c
index 5230bf4..b12229b 100755
--- a/zaptel.c
+++ b/zaptel.c
@@ -926,7 +926,7 @@ static void close_channel(struct zt_chan *chan)
 	chan->txgain = defgain;
 	chan->gainalloc = 0;
 	chan->eventinidx = chan->eventoutidx = 0;
-	chan->flags &= ~(ZT_FLAG_LINEAR | ZT_FLAG_PPP);
+	chan->flags &= ~(ZT_FLAG_LINEAR | ZT_FLAG_PPP | ZT_FLAG_SIGFREEZE);
 
 	zt_set_law(chan,0);
 
@@ -3722,6 +3722,25 @@ static int zt_chan_ioctl(struct inode *inode, struct file *file, unsigned int cm
 		return -ENOSYS;
 
 	switch(cmd) {
+	case ZT_SIGFREEZE:
+		get_user(j, (int *)data);
+		spin_lock_irqsave(&chan->lock, flags);
+		if (j) {
+			chan->flags |= ZT_FLAG_SIGFREEZE;
+		} else {
+			chan->flags &= ~ZT_FLAG_SIGFREEZE;
+		}
+		spin_unlock_irqrestore(&chan->lock, flags);
+		break;
+	case ZT_GETSIGFREEZE:
+		spin_lock_irqsave(&chan->lock, flags);
+		if (chan->flags & ZT_FLAG_SIGFREEZE)
+			j = 1;
+		else
+			j = 0;
+		spin_unlock_irqrestore(&chan->lock, flags);
+		put_user(j, (int *)data);
+		break;
 	case ZT_AUDIOMODE:
 		/* Only literal clear channels can be put in  */
 		if (chan->sig != ZT_SIG_CLEAR) return (-EINVAL);
@@ -4820,6 +4839,8 @@ static void __zt_hooksig_pvt(struct zt_chan *chan, zt_rxsig_t rxsig)
 		called with chan->lock held */
 
 	if ((chan->rxhooksig) == rxsig) return;
+	
+	if ((chan->flags & ZT_FLAG_SIGFREEZE)) return;
 
 	chan->rxhooksig = rxsig;
 	switch(chan->sig) {
@@ -4939,6 +4960,8 @@ void zt_rbsbits(struct zt_chan *chan, int cursig)
 	if (cursig == chan->rxsig)
 		return;
 
+	if ((chan->flags & ZT_FLAG_SIGFREEZE)) return;
+
 	spin_lock_irqsave(&chan->lock, flags);
 	switch(chan->sig) {
 	    case ZT_SIG_FXOGS: /* FXO Groundstart */
diff --git a/zaptel.h b/zaptel.h
index 76a92d7..8e5ea65 100755
--- a/zaptel.h
+++ b/zaptel.h
@@ -569,7 +569,7 @@ char dialstr[ZT_MAX_DTMF_BUF];
 /*
  * Queue Ping
  */
-#define ZT_TIMERPING _IOW (ZT_CODE, 42, int)
+#define ZT_TIMERPING _IOW (ZT_CODE, 42, int) /* Should be 52, but works */
 
 /*
  * Acknowledge ping
@@ -577,6 +577,12 @@ char dialstr[ZT_MAX_DTMF_BUF];
 #define ZT_TIMERPONG _IOW (ZT_CODE, 53, int)
 
 /*
+ * Set/get signalling freeze
+ */
+#define ZT_SIGFREEZE _IOW (ZT_CODE, 54, int)
+#define ZT_GETSIGFREEZE _IOR (ZT_CODE, 55, int)
+
+/*
  *  60-80 are reserved for private drivers
  *  80-85 are reserved for dynamic span stuff
  */
@@ -1137,6 +1143,7 @@ typedef enum {
 #define ZT_FLAG_LINEAR			(1 << 13)	/* Talk to user space in linear */
 #define ZT_FLAG_PPP			(1 << 14)	/* PPP is available */
 #define ZT_FLAG_T1PPP			(1 << 15)
+#define ZT_FLAG_SIGFREEZE		(1 << 16)	/* Freeze signalling */
 
 struct zt_span {
 	spinlock_t lock;