Merged revisions 237406 via svnmerge from

https://origsvn.digium.com/svn/asterisk/trunk

................
  r237406 | tilghman | 2010-01-04 12:28:28 -0600 (Mon, 04 Jan 2010) | 23 lines
  
  Merged revisions 237405 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.4
  
  ........
    r237405 | tilghman | 2010-01-04 12:19:00 -0600 (Mon, 04 Jan 2010) | 16 lines
    
    Add a flag to disable the Background behavior, for AGI users.
    This is in a section of code that relates to two other issues, namely
    issue #14011 and issue #14940), one of which was the behavior of
    Background when called with a context argument that matched the current
    context.  This fix broke FreePBX, however, in a post-Dial situation.
    Needless to say, this is an extremely difficult collision of several
    different issues.  While the use of an exception flag is ugly, fixing all
    of the issues linked is rather difficult (although if someone would like
    to propose a better solution, we're happy to entertain that suggestion).
    (closes issue #16434)
     Reported by: rickead2000
     Patches: 
           20091217__issue16434.diff.txt uploaded by tilghman (license 14)
           20091222__issue16434__1.6.1.diff.txt uploaded by tilghman (license 14)
     Tested by: rickead2000
  ........
................


git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.6.0@237407 f38db490-d61c-443f-a65b-d21fe96a405b

3 files changed, 20 insertions, 5 deletions

diff --git a/include/asterisk/channel.h b/include/asterisk/channel.h
index 4c15b482a..a00c0979a 100644
--- a/include/asterisk/channel.h
+++ b/include/asterisk/channel.h
@@ -594,6 +594,10 @@ enum {
 	AST_FLAG_BRIDGE_HANGUP_DONT = (1 << 18),
 	/*! This flag indicates whether the channel is in the channel list or not. */
 	AST_FLAG_IN_CHANNEL_LIST = (1 << 19),
+	/*! Disable certain workarounds.  This reintroduces certain bugs, but allows
+	 *  some non-traditional dialplans (like AGI) to continue to function.
+	 */
+	AST_FLAG_DISABLE_WORKAROUNDS = (1 << 20),
 };
 
 /*! \brief ast_bridge_config flags */
diff --git a/main/pbx.c b/main/pbx.c
index 176a4eda2..557800ca9 100644
--- a/main/pbx.c
+++ b/main/pbx.c
@@ -7985,8 +7985,13 @@ static int pbx_builtin_background(struct ast_channel *chan, void *data)
 	 * (but a longer extension COULD have matched), it would have previously
 	 * gone immediately to the "i" extension, but will now need to wait for a
 	 * timeout.
+	 *
+	 * Later, we had to add a flag to disable this workaround, because AGI
+	 * users can EXEC Background and reasonably expect that the DTMF code will
+	 * be returned (see #16434).
 	 */
-	if ((exten[0] = res) &&
+	if (!ast_test_flag(chan, AST_FLAG_DISABLE_WORKAROUNDS) &&
+			(exten[0] = res) &&
 			ast_canmatch_extension(chan, args.context, exten, 1, chan->cid.cid_num) &&
 			!ast_matchmore_extension(chan, args.context, exten, 1, chan->cid.cid_num)) {
 		snprintf(chan->exten, sizeof(chan->exten), "%c", res);
diff --git a/res/res_agi.c b/res/res_agi.c
index 86846b03a..c3be14b43 100644
--- a/res/res_agi.c
+++ b/res/res_agi.c
@@ -1485,18 +1485,21 @@ static int handle_hangup(struct ast_channel *chan, AGI *agi, int argc, char **ar
 
 static int handle_exec(struct ast_channel *chan, AGI *agi, int argc, char **argv)
 {
-	int res;
+	int res, workaround;
 	struct ast_app *app;
 
 	if (argc < 2)
 		return RESULT_SHOWUSAGE;
 
-	ast_verb(3, "AGI Script Executing Application: (%s) Options: (%s)\n", argv[1], argv[2]);
+	ast_verb(3, "AGI Script Executing Application: (%s) Options: (%s)\n", argv[1], argc >= 3 ? argv[2] : "");
 
 	if ((app = pbx_findapp(argv[1]))) {
-		if (ast_compat_res_agi && !ast_strlen_zero(argv[2])) {
+		if (!(workaround = ast_test_flag(chan, AST_FLAG_DISABLE_WORKAROUNDS))) {
+			ast_set_flag(chan, AST_FLAG_DISABLE_WORKAROUNDS);
+		}
+		if (ast_compat_res_agi && argc >= 3 && !ast_strlen_zero(argv[2])) {
 			char *compat = alloca(strlen(argv[2]) * 2 + 1), *cptr, *vptr;
-			for (cptr = compat, vptr = (argc == 2) ? "" : argv[2]; *vptr; vptr++) {
+			for (cptr = compat, vptr = argv[2]; *vptr; vptr++) {
 				if (*vptr == ',') {
 					*cptr++ = '\\';
 					*cptr++ = ',';
@@ -1511,6 +1514,9 @@ static int handle_exec(struct ast_channel *chan, AGI *agi, int argc, char **argv
 		} else {
 			res = pbx_exec(chan, app, argc == 2 ? "" : argv[2]);
 		}
+		if (!workaround) {
+			ast_clear_flag(chan, AST_FLAG_DISABLE_WORKAROUNDS);
+		}
 	} else {
 		ast_log(LOG_WARNING, "Could not find application (%s)\n", argv[1]);
 		res = -2;