Merged revisions 121280 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
r121280 | russell | 2008-06-09 11:35:40 -0500 (Mon, 09 Jun 2008) | 10 lines

Do not attempt to do emulation if an END digit is received and the length is
less than the defined minimum digit length, and the other end only wants END
digits (SIP INFO, for example).

(closes issue #12778)
Reported by: tsearle
Patches:
      12778.rev1.txt uploaded by russell (license 2)
Tested by: tsearle

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@121282 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/channel.c

@@ -2559,7 +2559,7 @@ static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio)
 					ast_log(LOG_DTMF, "DTMF end accepted without begin '%c' on %s\n", f->subclass, chan->name);
 					f->len = AST_MIN_DTMF_DURATION;
 				}
-				if (f->len < AST_MIN_DTMF_DURATION) {
+				if (f->len < AST_MIN_DTMF_DURATION && !ast_test_flag(chan, AST_FLAG_END_DTMF_ONLY)) {
 					ast_log(LOG_DTMF, "DTMF end '%c' has duration %ld but want minimum %d, emulating on %s\n", f->subclass, f->len, AST_MIN_DTMF_DURATION, chan->name);
 					ast_set_flag(chan, AST_FLAG_EMULATE_DTMF);
 					chan->emulate_dtmf_digit = f->subclass;
@@ -2568,6 +2568,9 @@ static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio)
 					f = &ast_null_frame;
 				} else {
 					ast_log(LOG_DTMF, "DTMF end passthrough '%c' on %s\n", f->subclass, chan->name);
+					if (f->len < AST_MIN_DTMF_DURATION) {
+						f->len = AST_MIN_DTMF_DURATION;
+					}
 					chan->dtmf_tv = now;
 				}
 				if (chan->audiohooks) {