Revert "ext/mysqlnd: support ER_CLIENT_INTERACTION_TIMEOUT"

This reverts commit 5035b85.

This broke Doctrine DBAL tests - more discussion in GH-13618.

Author: bukka

NEWS

@@ -16,8 +16,6 @@ PHP                                                                        NEWS
 
 - MySQLnd:
   . Fix shift out of bounds on 32-bit non-fast-path platforms. (nielsdos)
-  . Fixed bug #81335 (PHP Warning, Packets out of order after connection
-    timeout). (Appla)
 
 - OpenSSL:
   . Fixed bug GH-10495 (feof on OpenSSL stream hangs indefinitely).

ext/mysqli/tests/bug81335.phpt

@@ -130,7 +130,6 @@
 #define CR_INVALID_PARAMETER_NO	2034
 #define CR_INVALID_BUFFER_USE	2035
 #define CR_LOAD_DATA_LOCAL_INFILE_REJECTED 2068
-#define CR_CLIENT_INTERACTION_TIMEOUT 4031
 
 #define MYSQLND_EE_FILENOTFOUND	 7890
 

ext/mysqlnd/mysqlnd_enum_n_def.h

@@ -185,7 +185,7 @@ mysqlnd_query_read_result_set_header(MYSQLND_CONN_DATA * conn, MYSQLND_STMT * s)
 		UPSERT_STATUS_SET_AFFECTED_ROWS_TO_ERROR(conn->upsert_status);
 
 		if (FAIL == (ret = PACKET_READ(conn, &rset_header))) {
-			if (conn->error_info->error_no != CR_SERVER_GONE_ERROR && conn->error_info->error_no != CR_CLIENT_INTERACTION_TIMEOUT) {
+			if (conn->error_info->error_no != CR_SERVER_GONE_ERROR) {
 				php_error_docref(NULL, E_WARNING, "Error reading result set's header");
 			}
 			break;

ext/mysqlnd/mysqlnd_result.c

@@ -267,19 +267,6 @@ mysqlnd_read_header(MYSQLND_PFC * pfc, MYSQLND_VIO * vio, MYSQLND_PACKET_HEADER
 		pfc->data->packet_no++;
 		DBG_RETURN(PASS);
 	}
-	// @see https://dev.mysql.com/worklog/task/?id=12999
-	if (header->size > 0) {
-		zend_uchar *buf = mnd_emalloc(header->size);
-		if ((PASS == pfc->data->m.receive(pfc, vio, buf, header->size, conn_stats, error_info)) && buf[0] == ERROR_MARKER) {
-			php_mysqlnd_read_error_from_line(buf + 1, header->size - 1,
-			                                 error_info->error, sizeof(error_info->error),
-			                                 &error_info->error_no, error_info->sqlstate
-			);
-			mnd_efree(buf);
-			DBG_RETURN(FAIL);
-		}
-		mnd_efree(buf);
-	}
 
 	DBG_ERR_FMT("Logical link: packets out of order. Expected %u received %u. Packet size=%zu",
 				pfc->data->packet_no, header->packet_no, header->size);
@@ -307,9 +294,7 @@ mysqlnd_read_packet_header_and_body(MYSQLND_PACKET_HEADER * packet_header,
 	DBG_INF_FMT("buf=%p size=%zu", buf, buf_size);
 	if (FAIL == mysqlnd_read_header(pfc, vio, packet_header, stats, error_info)) {
 		SET_CONNECTION_STATE(connection_state, CONN_QUIT_SENT);
-		if (error_info->error_no == 0) {
-			SET_CLIENT_ERROR(error_info, CR_SERVER_GONE_ERROR, UNKNOWN_SQLSTATE, mysqlnd_server_gone);
-		}
+		SET_CLIENT_ERROR(error_info, CR_SERVER_GONE_ERROR, UNKNOWN_SQLSTATE, mysqlnd_server_gone);
 		DBG_ERR_FMT("Can't read %s's header", packet_type_as_text);
 		DBG_RETURN(FAIL);
 	}