Add support for looping back a single channel

git-svn-id: http://svn.digium.com/svn/zaptel/trunk@1310 5390a7c7-147a-4af0-8ec9-7488f05a26cb

1 files changed, 15 insertions, 1 deletions

diff --git a/zaptel.c b/zaptel.c
index c9e5b76..809d660 100644
--- a/zaptel.c
+++ b/zaptel.c
@@ -1031,7 +1031,7 @@ 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 | ZT_FLAG_SIGFREEZE);
+	chan->flags &= ~(ZT_FLAG_LOOPED | ZT_FLAG_LINEAR | ZT_FLAG_PPP | ZT_FLAG_SIGFREEZE);
 
 	zt_set_law(chan,0);
 
@@ -4371,6 +4371,16 @@ static int zt_chan_ioctl(struct inode *inode, struct file *file, unsigned int cm
 		put_user(chan->rxsig, (int *)data);
 		rv = 0;
 		break;
+	case ZT_LOOPBACK:
+		get_user(j, (int *)data);
+		spin_lock_irqsave(&chan->lock, flags);
+		if (j)
+			chan->flags |= ZT_FLAG_LOOPED;
+		else
+			chan->flags &= ~ZT_FLAG_LOOPED;
+		spin_unlock_irqrestore(&chan->lock, flags);
+		rv = 0;
+		break;
 	case ZT_HOOK:
 		get_user(j,(int *)data);
 		if (chan->flags & ZT_FLAG_CLEAR)
@@ -5163,6 +5173,10 @@ out in the later versions, and is put back now. */
 						zt_init_tone_state(&ms->ts, ms->curtone);
 				}
 			}
+		} else if (ms->flags & ZT_FLAG_LOOPED) {
+			for (x = 0; x < bytes; x++)
+				txb[x] = ms->readchunk[x];
+			bytes = 0;
 		} else if (ms->flags & ZT_FLAG_HDLC) {
 			for (x=0;x<bytes;x++) {
 				/* Okay, if we're HDLC, then transmit a flag by default */