Merged revisions 285745 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r285745 | qwell | 2010-09-09 15:11:06 -0500 (Thu, 09 Sep 2010) | 23 lines
  
  Merged revisions 285744 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.6.2
  
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    r285744 | qwell | 2010-09-09 15:09:23 -0500 (Thu, 09 Sep 2010) | 16 lines
    
    Merged revisions 285742 via svnmerge from 
    https://origsvn.digium.com/svn/asterisk/branches/1.4
    
    ........
      r285742 | qwell | 2010-09-09 15:06:31 -0500 (Thu, 09 Sep 2010) | 9 lines
      
      Transmit silence when reading DTMF in ast_readstring.
      
      Otherwise, you could get issues with DTMF timeouts causing hangups.
      
      (closes issue #17370)
      Reported by: makoto
      Patches: 
            channel-readstring-silence-generator.patch uploaded by makoto (license 38)
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@285746 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/channel.c

@@ -5368,6 +5368,8 @@ int ast_readstring_full(struct ast_channel *c, char *s, int len, int timeout, in
 	int pos = 0;	/* index in the buffer where we accumulate digits */
 	int to = ftimeout;
 
+	struct ast_silence_generator *silgen = NULL;
+
 	/* Stop if we're a zombie or need a soft hangup */
 	if (ast_test_flag(c, AST_FLAG_ZOMBIE) || ast_check_hangup(c))
 		return -1;
@@ -5378,24 +5380,33 @@ int ast_readstring_full(struct ast_channel *c, char *s, int len, int timeout, in
 		if (c->stream) {
 			d = ast_waitstream_full(c, AST_DIGIT_ANY, audiofd, ctrlfd);
 			ast_stopstream(c);
+			if (!silgen && ast_opt_transmit_silence)
+				silgen = ast_channel_start_silence_generator(c);
 			usleep(1000);
 			if (!d)
 				d = ast_waitfordigit_full(c, to, audiofd, ctrlfd);
 		} else {
+			if (!silgen && ast_opt_transmit_silence)
+				silgen = ast_channel_start_silence_generator(c);
 			d = ast_waitfordigit_full(c, to, audiofd, ctrlfd);
 		}
-		if (d < 0)
+		if (d < 0) {
+			ast_channel_stop_silence_generator(c, silgen);
 			return AST_GETDATA_FAILED;
+		}
 		if (d == 0) {
 			s[pos] = '\0';
+			ast_channel_stop_silence_generator(c, silgen);
 			return AST_GETDATA_TIMEOUT;
 		}
 		if (d == 1) {
 			s[pos] = '\0';
+			ast_channel_stop_silence_generator(c, silgen);
 			return AST_GETDATA_INTERRUPTED;
 		}
 		if (strchr(enders, d) && (pos == 0)) {
 			s[pos] = '\0';
+			ast_channel_stop_silence_generator(c, silgen);
 			return AST_GETDATA_EMPTY_END_TERMINATED;
 		}
 		if (!strchr(enders, d)) {
@@ -5403,6 +5414,7 @@ int ast_readstring_full(struct ast_channel *c, char *s, int len, int timeout, in
 		}
 		if (strchr(enders, d) || (pos >= len)) {
 			s[pos] = '\0';
+			ast_channel_stop_silence_generator(c, silgen);
 			return AST_GETDATA_COMPLETE;
 		}
 		to = timeout;