763  * try again later, or -1 if the channel is to be closed. */
773 			/* closed */  in dtio_write_ssl()
806  * try again later, or -1 if the channel is to be closed. */
959 /** Receive bytes from dtio->fd, store in buffer. Returns 0: closed,
985 		log_err("dnstap io: output closed, recv %s: %s", to,  in receive_bytes()
994 		verbose(VERB_DETAIL, "dnstap io: output closed by the other side");  in receive_bytes()
1003 /** Receive bytes over TLS from dtio->fd, store in buffer. Returns 0: closed,
1016 			verbose(VERB_DETAIL, "dnstap io: output closed by the "  in ssl_read_bytes()
1034 			verbose(VERB_DETAIL, "dnstap io: output closed by the "  in ssl_read_bytes()
1039 		verbose(VERB_DETAIL, "dnstap io: output closed by the "  in ssl_read_bytes()
1047 /** check if the output fd has been closed,
1048  * it returns false if the stream is closed. */
1054 	 * read call can return that the stream has been closed by the  in dtio_check_close()
1068 	/* the other end has been closed */  in dtio_check_close()
1075 /** Read accept frame. Returns -1: continue reading, 0: closed,
1100 			 /* connection closed */  in dtio_read_accept_frame()
1146 			 /* connection closed */  in dtio_read_accept_frame()
1332 /** check peer verification after ssl handshake connection, false if closed*/
1424 			/* closed */  in dtio_ssl_handshake()
1431 			/* SYSCALL and errno==0 means closed uncleanly */  in dtio_ssl_handshake()
1446 			/* closed */  in dtio_ssl_handshake()
1460 			/* closed */  in dtio_ssl_handshake()
1473 		/* closed */  in dtio_ssl_handshake()
1600 		verbose(VERB_ALGO, "dnstap io: cmd channel closed");  in dtio_cmd_cb()
1709 		verbose(VERB_ALGO, "dnstap io: stop flush: output closed");  in dtio_control_stop_send()
1768 					"stop flush: output closed");  in dtio_stop_ev_cb()
1780 						"stop flush: output closed");  in dtio_stop_ev_cb()