support sending text through agent channels (issue #5295)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@6787 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channel.c

@@ -1831,7 +1831,7 @@ char *ast_recvtext(struct ast_channel *chan, int timeout)
 	return buf;
 }
 
-int ast_sendtext(struct ast_channel *chan, char *text)
+int ast_sendtext(struct ast_channel *chan, const char *text)
 {
 	int res = 0;
 	/* Stop if we're a zombie or need a soft hangup */

channels/chan_agent.c

@@ -244,6 +244,7 @@ static int agent_answer(struct ast_channel *ast);
 static struct ast_frame *agent_read(struct ast_channel *ast);
 static int agent_write(struct ast_channel *ast, struct ast_frame *f);
 static int agent_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen);
+static int agent_sendtext(struct ast_channel *ast, const char *text);
 static int agent_indicate(struct ast_channel *ast, int condition);
 static int agent_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
 static struct ast_channel *agent_bridgedchannel(struct ast_channel *chan, struct ast_channel *bridge);
@@ -261,6 +262,7 @@ static const struct ast_channel_tech agent_tech = {
 	.read = agent_read,
 	.write = agent_write,
 	.send_html = agent_sendhtml,
+	.send_text = agent_sendtext,
 	.exception = agent_read,
 	.indicate = agent_indicate,
 	.fixup = agent_fixup,
@@ -558,6 +560,17 @@ static int agent_sendhtml(struct ast_channel *ast, int subclass, const char *dat
 	return res;
 }
 
+static int agent_sendtext(struct ast_channel *ast, const char *text)
+{
+	struct agent_pvt *p = ast->tech_pvt;
+	int res = -1;
+	ast_mutex_lock(&p->lock);
+	if (p->chan) 
+		res = ast_sendtext(p->chan, text);
+	ast_mutex_unlock(&p->lock);
+	return res;
+}
+
 static int agent_write(struct ast_channel *ast, struct ast_frame *f)
 {
 	struct agent_pvt *p = ast->tech_pvt;

include/asterisk/channel.h

@@ -722,7 +722,7 @@ int ast_set_write_format(struct ast_channel *chan, int format);
  * Write text to a display on a channel
  * Returns 0 on success, -1 on failure
  */
-int ast_sendtext(struct ast_channel *chan, char *text);
+int ast_sendtext(struct ast_channel *chan, const char *text);
 
 /*! Receives a text character from a channel */
 /*!