CHANNEL_DEADLOCK_AVOIDANCE(ast);
/*
- * For PRI channels, we must refresh the private pointer because
- * the call could move to another B channel while the Asterisk
- * channel is unlocked.
+ * Check to see if the channel is still associated with the same
+ * private structure. While the Asterisk channel was unlocked
+ * the following events may have occured:
+ *
+ * 1) A masquerade may have associated the channel with another
+ * technology or private structure.
+ *
+ * 2) For PRI calls, call signaling could change the channel
+ * association to another B channel (private structure).
*/
- p = ast_channel_tech_pvt(ast);
+ if (ast_channel_tech_pvt(ast) != p) {
+ /* The channel is no longer associated. Quit gracefully. */
+ return &ast_null_frame;
+ }
}
idx = dahdi_get_index(ast, p, 0);