Lay foundations for named pipe support in mysqlnd

ext/mysqlnd/mysqlnd.c

@@ -2116,10 +2116,17 @@ MYSQLND_METHOD(mysqlnd_conn, set_client_option)(MYSQLND * const conn,
 			DBG_INF_FMT("charset=%s", conn->options.charset_name);
 			break;
 		}
+		case MYSQL_OPT_NAMED_PIPE:
+			conn->options.protocol = MYSQL_PROTOCOL_PIPE;
+			break;
+		case MYSQL_OPT_PROTOCOL:
+			if (*(unsigned int*) value < MYSQL_PROTOCOL_LAST) {
+				conn->options.protocol = *(unsigned int*) value;
+			}
+			break;
 #ifdef WHEN_SUPPORTED_BY_MYSQLI
 		case MYSQL_SET_CHARSET_DIR:
 		case MYSQL_OPT_RECONNECT:
-		case MYSQL_OPT_PROTOCOL:
 			/* we don't need external character sets, all character sets are
 			   compiled in. For compatibility we just ignore this setting.
 			   Same for protocol, we don't support old protocol */
@@ -2131,7 +2138,6 @@ MYSQLND_METHOD(mysqlnd_conn, set_client_option)(MYSQLND * const conn,
 #endif
 
 #ifdef WHEN_SUPPORTED_BY_MYSQLI
-		case MYSQL_OPT_NAMED_PIPE:
 		case MYSQL_SHARED_MEMORY_BASE_NAME:
 		case MYSQL_OPT_USE_RESULT:
 		case MYSQL_SECURE_AUTH:

ext/mysqlnd/mysqlnd_enum_n_def.h

@@ -168,6 +168,15 @@ typedef enum mysqlnd_option
 	MYSQLND_OPT_SSL_PASSPHRASE = 209
 } enum_mysqlnd_option;
 
+typedef enum mysqlnd_protocol_type
+{
+	MYSQL_PROTOCOL_DEFAULT = 0,
+	MYSQL_PROTOCOL_TCP,		/* all, supported */
+	MYSQL_PROTOCOL_SOCKET,	/* unix, supported */
+	MYSQL_PROTOCOL_PIPE,	/* win32, not-supported */
+	MYSQL_PROTOCOL_MEMORY,	/* win32, not-supported */
+	MYSQL_PROTOCOL_LAST
+} enum_mysqlnd_protocol_type;
 
 typedef enum mysqlnd_field_types
 {

ext/mysqlnd/mysqlnd_structs.h

@@ -161,7 +161,7 @@ typedef struct st_mysqlnd_options
 	char		* unused3;
 	char		* unused4;
 	char		* unused5;
-	zend_bool	unused6;
+	enum_mysqlnd_protocol_type protocol;
 
 	char 		*charset_name;
 	/* maximum allowed packet size for communication */