AGI: Only defer frames when in an interception routine.

AGI recently was modified to defer important frames. This was because
when AGI was used in a connected line interception routine, the
resulting connected line frame would end up getting discarded by the
AGI.

However, this caused bad behavior in other cases. Specifically, during a
transfer, if someone attempted to manually set the Caller ID on a
channel in an AGI, the deferred connected line frame would end up
overwriting what had been manually set in the AGI.

Since the initial issue was specific to interception routines, this
change removes the manual frame deferral from AGI and instead uses the
new frame deferral API in interception routines.

ASTERISK-26343 #close
Reported by Morton Tryfoss

Change-Id: Iab7d39436d0ee99bfe32ad55ef91e9bd88db4208

1 files changed, 1 insertions, 37 deletions

diff --git a/res/res_agi.c b/res/res_agi.c
index 06df75293..969c62dd0 100644
--- a/res/res_agi.c
+++ b/res/res_agi.c
@@ -4093,23 +4093,6 @@ static enum agi_result agi_handle_command(struct ast_channel *chan, AGI *agi, ch
 	return AGI_RESULT_SUCCESS;
 }
 
-AST_LIST_HEAD_NOLOCK(deferred_frames, ast_frame);
-
-static void queue_deferred_frames(struct deferred_frames *deferred_frames,
-	struct ast_channel *chan)
-{
-	struct ast_frame *f;
-
-	if (!AST_LIST_EMPTY(deferred_frames)) {
-		ast_channel_lock(chan);
-		while ((f = AST_LIST_REMOVE_HEAD(deferred_frames, frame_list))) {
-			ast_queue_frame_head(chan, f);
-			ast_frfree(f);
-		}
-		ast_channel_unlock(chan);
-	}
-}
-
 static enum agi_result run_agi(struct ast_channel *chan, char *request, AGI *agi, int pid, int *status, int dead, int argc, char *argv[])
 {
 	struct ast_channel *c;
@@ -4128,9 +4111,6 @@ static enum agi_result run_agi(struct ast_channel *chan, char *request, AGI *agi
 	const char *sighup_str;
 	const char *exit_on_hangup_str;
 	int exit_on_hangup;
-	struct deferred_frames deferred_frames;
-
-	AST_LIST_HEAD_INIT_NOLOCK(&deferred_frames);
 
 	ast_channel_lock(chan);
 	sighup_str = pbx_builtin_getvar_helper(chan, "AGISIGHUP");
@@ -4192,20 +4172,8 @@ static enum agi_result run_agi(struct ast_channel *chan, char *request, AGI *agi
 					/* Write, ignoring errors */
 					if (write(agi->audio, f->data.ptr, f->datalen) < 0) {
 					}
-					ast_frfree(f);
-				} else if (ast_is_deferrable_frame(f)) {
-					struct ast_frame *dup_f;
-
-					if ((dup_f = ast_frisolate(f))) {
-						AST_LIST_INSERT_HEAD(&deferred_frames, dup_f, frame_list);
-					}
-
-					if (dup_f != f) {
-						ast_frfree(f);
-					}
-				} else {
-					ast_frfree(f);
 				}
+				ast_frfree(f);
 			}
 		} else if (outfd > -1) {
 			size_t len = sizeof(buf);
@@ -4253,8 +4221,6 @@ static enum agi_result run_agi(struct ast_channel *chan, char *request, AGI *agi
 				buf[buflen - 1] = '\0';
 			}
 
-			queue_deferred_frames(&deferred_frames, chan);
-
 			if (agidebug)
 				ast_verbose("<%s>AGI Rx << %s\n", ast_channel_name(chan), buf);
 			cmd_status = agi_handle_command(chan, agi, buf, dead);
@@ -4277,8 +4243,6 @@ static enum agi_result run_agi(struct ast_channel *chan, char *request, AGI *agi
 		}
 	}
 
-	queue_deferred_frames(&deferred_frames, chan);
-
 	if (agi->speech) {
 		ast_speech_destroy(agi->speech);
 	}