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manager_channels.c: Fix allocation failure crash.

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An earlier allocation failure failed to create a channel snapshot for the
AMI HangupRequest/SoftHangupRequest event which resulted in a crash in
channel_hangup_request_cb().  Where the stasis message gets generated
cannot tell if the NULL snapshot returned was because of an allocation
failure or the channel was a dummy channel.

* Made channel_hangup_request_cb() check if the channel blob has a
snapshot and exit if it doesn't.

* Eliminated the RAII_VAR usage in channel_hangup_request_cb().

Change-Id: I0b6a1c4e95cbb7d80b2a7054c6eadecc169dfd24
This commit is contained in:
Richard Mudgett
2016-04-13 17:09:53 -05:00
parent 1e93f3d723
commit 7303e3dc96
1 changed files with 16 additions and 8 deletions
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14
main/manager_channels.c
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@@ -697,20 +697,25 @@ static void channel_hangup_request_cb(void *data,
struct stasis_message *message) struct stasis_message *message)
{ {
struct ast_channel_blob *obj = stasis_message_data(message); struct ast_channel_blob *obj = stasis_message_data(message);
RAII_VAR(struct ast_str *, extra, NULL, ast_free); struct ast_str *extra;
RAII_VAR(struct ast_str *, channel_event_string, NULL, ast_free); struct ast_str *channel_event_string;
struct ast_json *cause; struct ast_json *cause;
int is_soft; int is_soft;
char *manager_event = "HangupRequest"; char *manager_event = "HangupRequest";
if (!obj->snapshot) {
/* No snapshot? Likely an earlier allocation failure creating it. */
return;
}
extra = ast_str_create(20); extra = ast_str_create(20);
if (!extra) { if (!extra) {
return; return;
} }
channel_event_string = ast_manager_build_channel_state_string(obj->snapshot); channel_event_string = ast_manager_build_channel_state_string(obj->snapshot);
if (!channel_event_string) { if (!channel_event_string) {
ast_free(extra);
return; return;
} }
@@ -730,6 +735,9 @@ static void channel_hangup_request_cb(void *data,
"%s%s", "%s%s",
ast_str_buffer(channel_event_string), ast_str_buffer(channel_event_string),
ast_str_buffer(extra)); ast_str_buffer(extra));
ast_free(channel_event_string);
ast_free(extra);
} }
static void channel_chanspy_stop_cb(void *data, struct stasis_subscription *sub, static void channel_chanspy_stop_cb(void *data, struct stasis_subscription *sub,