diff options
Diffstat (limited to 'vendor/github.com/go-sql-driver/mysql/packets.go')
| -rw-r--r-- | vendor/github.com/go-sql-driver/mysql/packets.go | 1296 |
1 files changed, 0 insertions, 1296 deletions
diff --git a/vendor/github.com/go-sql-driver/mysql/packets.go b/vendor/github.com/go-sql-driver/mysql/packets.go deleted file mode 100644 index 5e085376..00000000 --- a/vendor/github.com/go-sql-driver/mysql/packets.go +++ /dev/null @@ -1,1296 +0,0 @@ -// Go MySQL Driver - A MySQL-Driver for Go's database/sql package -// -// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved. -// -// This Source Code Form is subject to the terms of the Mozilla Public -// License, v. 2.0. If a copy of the MPL was not distributed with this file, -// You can obtain one at http://mozilla.org/MPL/2.0/. - -package mysql - -import ( - "bytes" - "crypto/tls" - "database/sql/driver" - "encoding/binary" - "errors" - "fmt" - "io" - "math" - "time" -) - -// Packets documentation: -// http://dev.mysql.com/doc/internals/en/client-server-protocol.html - -// Read packet to buffer 'data' -func (mc *mysqlConn) readPacket() ([]byte, error) { - var prevData []byte - for { - // read packet header - data, err := mc.buf.readNext(4) - if err != nil { - if cerr := mc.canceled.Value(); cerr != nil { - return nil, cerr - } - errLog.Print(err) - mc.Close() - return nil, ErrInvalidConn - } - - // packet length [24 bit] - pktLen := int(uint32(data[0]) | uint32(data[1])<<8 | uint32(data[2])<<16) - - // check packet sync [8 bit] - if data[3] != mc.sequence { - if data[3] > mc.sequence { - return nil, ErrPktSyncMul - } - return nil, ErrPktSync - } - mc.sequence++ - - // packets with length 0 terminate a previous packet which is a - // multiple of (2^24)-1 bytes long - if pktLen == 0 { - // there was no previous packet - if prevData == nil { - errLog.Print(ErrMalformPkt) - mc.Close() - return nil, ErrInvalidConn - } - - return prevData, nil - } - - // read packet body [pktLen bytes] - data, err = mc.buf.readNext(pktLen) - if err != nil { - if cerr := mc.canceled.Value(); cerr != nil { - return nil, cerr - } - errLog.Print(err) - mc.Close() - return nil, ErrInvalidConn - } - - // return data if this was the last packet - if pktLen < maxPacketSize { - // zero allocations for non-split packets - if prevData == nil { - return data, nil - } - - return append(prevData, data...), nil - } - - prevData = append(prevData, data...) - } -} - -// Write packet buffer 'data' -func (mc *mysqlConn) writePacket(data []byte) error { - pktLen := len(data) - 4 - - if pktLen > mc.maxAllowedPacket { - return ErrPktTooLarge - } - - for { - var size int - if pktLen >= maxPacketSize { - data[0] = 0xff - data[1] = 0xff - data[2] = 0xff - size = maxPacketSize - } else { - data[0] = byte(pktLen) - data[1] = byte(pktLen >> 8) - data[2] = byte(pktLen >> 16) - size = pktLen - } - data[3] = mc.sequence - - // Write packet - if mc.writeTimeout > 0 { - if err := mc.netConn.SetWriteDeadline(time.Now().Add(mc.writeTimeout)); err != nil { - return err - } - } - - n, err := mc.netConn.Write(data[:4+size]) - if err == nil && n == 4+size { - mc.sequence++ - if size != maxPacketSize { - return nil - } - pktLen -= size - data = data[size:] - continue - } - - // Handle error - if err == nil { // n != len(data) - mc.cleanup() - errLog.Print(ErrMalformPkt) - } else { - if cerr := mc.canceled.Value(); cerr != nil { - return cerr - } - if n == 0 && pktLen == len(data)-4 { - // only for the first loop iteration when nothing was written yet - return errBadConnNoWrite - } - mc.cleanup() - errLog.Print(err) - } - return ErrInvalidConn - } -} - -/****************************************************************************** -* Initialization Process * -******************************************************************************/ - -// Handshake Initialization Packet -// http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::Handshake -func (mc *mysqlConn) readHandshakePacket() (data []byte, plugin string, err error) { - data, err = mc.readPacket() - if err != nil { - // for init we can rewrite this to ErrBadConn for sql.Driver to retry, since - // in connection initialization we don't risk retrying non-idempotent actions. - if err == ErrInvalidConn { - return nil, "", driver.ErrBadConn - } - return - } - - if data[0] == iERR { - return nil, "", mc.handleErrorPacket(data) - } - - // protocol version [1 byte] - if data[0] < minProtocolVersion { - return nil, "", fmt.Errorf( - "unsupported protocol version %d. Version %d or higher is required", - data[0], - minProtocolVersion, - ) - } - - // server version [null terminated string] - // connection id [4 bytes] - pos := 1 + bytes.IndexByte(data[1:], 0x00) + 1 + 4 - - // first part of the password cipher [8 bytes] - authData := data[pos : pos+8] - - // (filler) always 0x00 [1 byte] - pos += 8 + 1 - - // capability flags (lower 2 bytes) [2 bytes] - mc.flags = clientFlag(binary.LittleEndian.Uint16(data[pos : pos+2])) - if mc.flags&clientProtocol41 == 0 { - return nil, "", ErrOldProtocol - } - if mc.flags&clientSSL == 0 && mc.cfg.tls != nil { - if mc.cfg.TLSConfig == "preferred" { - mc.cfg.tls = nil - } else { - return nil, "", ErrNoTLS - } - } - pos += 2 - - if len(data) > pos { - // character set [1 byte] - // status flags [2 bytes] - // capability flags (upper 2 bytes) [2 bytes] - // length of auth-plugin-data [1 byte] - // reserved (all [00]) [10 bytes] - pos += 1 + 2 + 2 + 1 + 10 - - // second part of the password cipher [mininum 13 bytes], - // where len=MAX(13, length of auth-plugin-data - 8) - // - // The web documentation is ambiguous about the length. However, - // according to mysql-5.7/sql/auth/sql_authentication.cc line 538, - // the 13th byte is "\0 byte, terminating the second part of - // a scramble". So the second part of the password cipher is - // a NULL terminated string that's at least 13 bytes with the - // last byte being NULL. - // - // The official Python library uses the fixed length 12 - // which seems to work but technically could have a hidden bug. - authData = append(authData, data[pos:pos+12]...) - pos += 13 - - // EOF if version (>= 5.5.7 and < 5.5.10) or (>= 5.6.0 and < 5.6.2) - // \NUL otherwise - if end := bytes.IndexByte(data[pos:], 0x00); end != -1 { - plugin = string(data[pos : pos+end]) - } else { - plugin = string(data[pos:]) - } - - // make a memory safe copy of the cipher slice - var b [20]byte - copy(b[:], authData) - return b[:], plugin, nil - } - - // make a memory safe copy of the cipher slice - var b [8]byte - copy(b[:], authData) - return b[:], plugin, nil -} - -// Client Authentication Packet -// http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::HandshakeResponse -func (mc *mysqlConn) writeHandshakeResponsePacket(authResp []byte, plugin string) error { - // Adjust client flags based on server support - clientFlags := clientProtocol41 | - clientSecureConn | - clientLongPassword | - clientTransactions | - clientLocalFiles | - clientPluginAuth | - clientMultiResults | - mc.flags&clientLongFlag - - if mc.cfg.ClientFoundRows { - clientFlags |= clientFoundRows - } - - // To enable TLS / SSL - if mc.cfg.tls != nil { - clientFlags |= clientSSL - } - - if mc.cfg.MultiStatements { - clientFlags |= clientMultiStatements - } - - // encode length of the auth plugin data - var authRespLEIBuf [9]byte - authRespLen := len(authResp) - authRespLEI := appendLengthEncodedInteger(authRespLEIBuf[:0], uint64(authRespLen)) - if len(authRespLEI) > 1 { - // if the length can not be written in 1 byte, it must be written as a - // length encoded integer - clientFlags |= clientPluginAuthLenEncClientData - } - - pktLen := 4 + 4 + 1 + 23 + len(mc.cfg.User) + 1 + len(authRespLEI) + len(authResp) + 21 + 1 - - // To specify a db name - if n := len(mc.cfg.DBName); n > 0 { - clientFlags |= clientConnectWithDB - pktLen += n + 1 - } - - // Calculate packet length and get buffer with that size - data, err := mc.buf.takeSmallBuffer(pktLen + 4) - if err != nil { - // cannot take the buffer. Something must be wrong with the connection - errLog.Print(err) - return errBadConnNoWrite - } - - // ClientFlags [32 bit] - data[4] = byte(clientFlags) - data[5] = byte(clientFlags >> 8) - data[6] = byte(clientFlags >> 16) - data[7] = byte(clientFlags >> 24) - - // MaxPacketSize [32 bit] (none) - data[8] = 0x00 - data[9] = 0x00 - data[10] = 0x00 - data[11] = 0x00 - - // Charset [1 byte] - var found bool - data[12], found = collations[mc.cfg.Collation] - if !found { - // Note possibility for false negatives: - // could be triggered although the collation is valid if the - // collations map does not contain entries the server supports. - return errors.New("unknown collation") - } - - // SSL Connection Request Packet - // http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::SSLRequest - if mc.cfg.tls != nil { - // Send TLS / SSL request packet - if err := mc.writePacket(data[:(4+4+1+23)+4]); err != nil { - return err - } - - // Switch to TLS - tlsConn := tls.Client(mc.netConn, mc.cfg.tls) - if err := tlsConn.Handshake(); err != nil { - return err - } - mc.netConn = tlsConn - mc.buf.nc = tlsConn - } - - // Filler [23 bytes] (all 0x00) - pos := 13 - for ; pos < 13+23; pos++ { - data[pos] = 0 - } - - // User [null terminated string] - if len(mc.cfg.User) > 0 { - pos += copy(data[pos:], mc.cfg.User) - } - data[pos] = 0x00 - pos++ - - // Auth Data [length encoded integer] - pos += copy(data[pos:], authRespLEI) - pos += copy(data[pos:], authResp) - - // Databasename [null terminated string] - if len(mc.cfg.DBName) > 0 { - pos += copy(data[pos:], mc.cfg.DBName) - data[pos] = 0x00 - pos++ - } - - pos += copy(data[pos:], plugin) - data[pos] = 0x00 - pos++ - - // Send Auth packet - return mc.writePacket(data[:pos]) -} - -// http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::AuthSwitchResponse -func (mc *mysqlConn) writeAuthSwitchPacket(authData []byte) error { - pktLen := 4 + len(authData) - data, err := mc.buf.takeSmallBuffer(pktLen) - if err != nil { - // cannot take the buffer. Something must be wrong with the connection - errLog.Print(err) - return errBadConnNoWrite - } - - // Add the auth data [EOF] - copy(data[4:], authData) - return mc.writePacket(data) -} - -/****************************************************************************** -* Command Packets * -******************************************************************************/ - -func (mc *mysqlConn) writeCommandPacket(command byte) error { - // Reset Packet Sequence - mc.sequence = 0 - - data, err := mc.buf.takeSmallBuffer(4 + 1) - if err != nil { - // cannot take the buffer. Something must be wrong with the connection - errLog.Print(err) - return errBadConnNoWrite - } - - // Add command byte - data[4] = command - - // Send CMD packet - return mc.writePacket(data) -} - -func (mc *mysqlConn) writeCommandPacketStr(command byte, arg string) error { - // Reset Packet Sequence - mc.sequence = 0 - - pktLen := 1 + len(arg) - data, err := mc.buf.takeBuffer(pktLen + 4) - if err != nil { - // cannot take the buffer. Something must be wrong with the connection - errLog.Print(err) - return errBadConnNoWrite - } - - // Add command byte - data[4] = command - - // Add arg - copy(data[5:], arg) - - // Send CMD packet - return mc.writePacket(data) -} - -func (mc *mysqlConn) writeCommandPacketUint32(command byte, arg uint32) error { - // Reset Packet Sequence - mc.sequence = 0 - - data, err := mc.buf.takeSmallBuffer(4 + 1 + 4) - if err != nil { - // cannot take the buffer. Something must be wrong with the connection - errLog.Print(err) - return errBadConnNoWrite - } - - // Add command byte - data[4] = command - - // Add arg [32 bit] - data[5] = byte(arg) - data[6] = byte(arg >> 8) - data[7] = byte(arg >> 16) - data[8] = byte(arg >> 24) - - // Send CMD packet - return mc.writePacket(data) -} - -/****************************************************************************** -* Result Packets * -******************************************************************************/ - -func (mc *mysqlConn) readAuthResult() ([]byte, string, error) { - data, err := mc.readPacket() - if err != nil { - return nil, "", err - } - - // packet indicator - switch data[0] { - - case iOK: - return nil, "", mc.handleOkPacket(data) - - case iAuthMoreData: - return data[1:], "", err - - case iEOF: - if len(data) == 1 { - // https://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::OldAuthSwitchRequest - return nil, "mysql_old_password", nil - } - pluginEndIndex := bytes.IndexByte(data, 0x00) - if pluginEndIndex < 0 { - return nil, "", ErrMalformPkt - } - plugin := string(data[1:pluginEndIndex]) - authData := data[pluginEndIndex+1:] - return authData, plugin, nil - - default: // Error otherwise - return nil, "", mc.handleErrorPacket(data) - } -} - -// Returns error if Packet is not an 'Result OK'-Packet -func (mc *mysqlConn) readResultOK() error { - data, err := mc.readPacket() - if err != nil { - return err - } - - if data[0] == iOK { - return mc.handleOkPacket(data) - } - return mc.handleErrorPacket(data) -} - -// Result Set Header Packet -// http://dev.mysql.com/doc/internals/en/com-query-response.html#packet-ProtocolText::Resultset -func (mc *mysqlConn) readResultSetHeaderPacket() (int, error) { - data, err := mc.readPacket() - if err == nil { - switch data[0] { - - case iOK: - return 0, mc.handleOkPacket(data) - - case iERR: - return 0, mc.handleErrorPacket(data) - - case iLocalInFile: - return 0, mc.handleInFileRequest(string(data[1:])) - } - - // column count - num, _, n := readLengthEncodedInteger(data) - if n-len(data) == 0 { - return int(num), nil - } - - return 0, ErrMalformPkt - } - return 0, err -} - -// Error Packet -// http://dev.mysql.com/doc/internals/en/generic-response-packets.html#packet-ERR_Packet -func (mc *mysqlConn) handleErrorPacket(data []byte) error { - if data[0] != iERR { - return ErrMalformPkt - } - - // 0xff [1 byte] - - // Error Number [16 bit uint] - errno := binary.LittleEndian.Uint16(data[1:3]) - - // 1792: ER_CANT_EXECUTE_IN_READ_ONLY_TRANSACTION - // 1290: ER_OPTION_PREVENTS_STATEMENT (returned by Aurora during failover) - if (errno == 1792 || errno == 1290) && mc.cfg.RejectReadOnly { - // Oops; we are connected to a read-only connection, and won't be able - // to issue any write statements. Since RejectReadOnly is configured, - // we throw away this connection hoping this one would have write - // permission. This is specifically for a possible race condition - // during failover (e.g. on AWS Aurora). See README.md for more. - // - // We explicitly close the connection before returning - // driver.ErrBadConn to ensure that `database/sql` purges this - // connection and initiates a new one for next statement next time. - mc.Close() - return driver.ErrBadConn - } - - pos := 3 - - // SQL State [optional: # + 5bytes string] - if data[3] == 0x23 { - //sqlstate := string(data[4 : 4+5]) - pos = 9 - } - - // Error Message [string] - return &MySQLError{ - Number: errno, - Message: string(data[pos:]), - } -} - -func readStatus(b []byte) statusFlag { - return statusFlag(b[0]) | statusFlag(b[1])<<8 -} - -// Ok Packet -// http://dev.mysql.com/doc/internals/en/generic-response-packets.html#packet-OK_Packet -func (mc *mysqlConn) handleOkPacket(data []byte) error { - var n, m int - - // 0x00 [1 byte] - - // Affected rows [Length Coded Binary] - mc.affectedRows, _, n = readLengthEncodedInteger(data[1:]) - - // Insert id [Length Coded Binary] - mc.insertId, _, m = readLengthEncodedInteger(data[1+n:]) - - // server_status [2 bytes] - mc.status = readStatus(data[1+n+m : 1+n+m+2]) - if mc.status&statusMoreResultsExists != 0 { - return nil - } - - // warning count [2 bytes] - - return nil -} - -// Read Packets as Field Packets until EOF-Packet or an Error appears -// http://dev.mysql.com/doc/internals/en/com-query-response.html#packet-Protocol::ColumnDefinition41 -func (mc *mysqlConn) readColumns(count int) ([]mysqlField, error) { - columns := make([]mysqlField, count) - - for i := 0; ; i++ { - data, err := mc.readPacket() - if err != nil { - return nil, err - } - - // EOF Packet - if data[0] == iEOF && (len(data) == 5 || len(data) == 1) { - if i == count { - return columns, nil - } - return nil, fmt.Errorf("column count mismatch n:%d len:%d", count, len(columns)) - } - - // Catalog - pos, err := skipLengthEncodedString(data) - if err != nil { - return nil, err - } - - // Database [len coded string] - n, err := skipLengthEncodedString(data[pos:]) - if err != nil { - return nil, err - } - pos += n - - // Table [len coded string] - if mc.cfg.ColumnsWithAlias { - tableName, _, n, err := readLengthEncodedString(data[pos:]) - if err != nil { - return nil, err - } - pos += n - columns[i].tableName = string(tableName) - } else { - n, err = skipLengthEncodedString(data[pos:]) - if err != nil { - return nil, err - } - pos += n - } - - // Original table [len coded string] - n, err = skipLengthEncodedString(data[pos:]) - if err != nil { - return nil, err - } - pos += n - - // Name [len coded string] - name, _, n, err := readLengthEncodedString(data[pos:]) - if err != nil { - return nil, err - } - columns[i].name = string(name) - pos += n - - // Original name [len coded string] - n, err = skipLengthEncodedString(data[pos:]) - if err != nil { - return nil, err - } - pos += n - - // Filler [uint8] - pos++ - - // Charset [charset, collation uint8] - columns[i].charSet = data[pos] - pos += 2 - - // Length [uint32] - columns[i].length = binary.LittleEndian.Uint32(data[pos : pos+4]) - pos += 4 - - // Field type [uint8] - columns[i].fieldType = fieldType(data[pos]) - pos++ - - // Flags [uint16] - columns[i].flags = fieldFlag(binary.LittleEndian.Uint16(data[pos : pos+2])) - pos += 2 - - // Decimals [uint8] - columns[i].decimals = data[pos] - //pos++ - - // Default value [len coded binary] - //if pos < len(data) { - // defaultVal, _, err = bytesToLengthCodedBinary(data[pos:]) - //} - } -} - -// Read Packets as Field Packets until EOF-Packet or an Error appears -// http://dev.mysql.com/doc/internals/en/com-query-response.html#packet-ProtocolText::ResultsetRow -func (rows *textRows) readRow(dest []driver.Value) error { - mc := rows.mc - - if rows.rs.done { - return io.EOF - } - - data, err := mc.readPacket() - if err != nil { - return err - } - - // EOF Packet - if data[0] == iEOF && len(data) == 5 { - // server_status [2 bytes] - rows.mc.status = readStatus(data[3:]) - rows.rs.done = true - if !rows.HasNextResultSet() { - rows.mc = nil - } - return io.EOF - } - if data[0] == iERR { - rows.mc = nil - return mc.handleErrorPacket(data) - } - - // RowSet Packet - var n int - var isNull bool - pos := 0 - - for i := range dest { - // Read bytes and convert to string - dest[i], isNull, n, err = readLengthEncodedString(data[pos:]) - pos += n - if err == nil { - if !isNull { - if !mc.parseTime { - continue - } else { - switch rows.rs.columns[i].fieldType { - case fieldTypeTimestamp, fieldTypeDateTime, - fieldTypeDate, fieldTypeNewDate: - dest[i], err = parseDateTime( - string(dest[i].([]byte)), - mc.cfg.Loc, - ) - if err == nil { - continue - } - default: - continue - } - } - - } else { - dest[i] = nil - continue - } - } - return err // err != nil - } - - return nil -} - -// Reads Packets until EOF-Packet or an Error appears. Returns count of Packets read -func (mc *mysqlConn) readUntilEOF() error { - for { - data, err := mc.readPacket() - if err != nil { - return err - } - - switch data[0] { - case iERR: - return mc.handleErrorPacket(data) - case iEOF: - if len(data) == 5 { - mc.status = readStatus(data[3:]) - } - return nil - } - } -} - -/****************************************************************************** -* Prepared Statements * -******************************************************************************/ - -// Prepare Result Packets -// http://dev.mysql.com/doc/internals/en/com-stmt-prepare-response.html -func (stmt *mysqlStmt) readPrepareResultPacket() (uint16, error) { - data, err := stmt.mc.readPacket() - if err == nil { - // packet indicator [1 byte] - if data[0] != iOK { - return 0, stmt.mc.handleErrorPacket(data) - } - - // statement id [4 bytes] - stmt.id = binary.LittleEndian.Uint32(data[1:5]) - - // Column count [16 bit uint] - columnCount := binary.LittleEndian.Uint16(data[5:7]) - - // Param count [16 bit uint] - stmt.paramCount = int(binary.LittleEndian.Uint16(data[7:9])) - - // Reserved [8 bit] - - // Warning count [16 bit uint] - - return columnCount, nil - } - return 0, err -} - -// http://dev.mysql.com/doc/internals/en/com-stmt-send-long-data.html -func (stmt *mysqlStmt) writeCommandLongData(paramID int, arg []byte) error { - maxLen := stmt.mc.maxAllowedPacket - 1 - pktLen := maxLen - - // After the header (bytes 0-3) follows before the data: - // 1 byte command - // 4 bytes stmtID - // 2 bytes paramID - const dataOffset = 1 + 4 + 2 - - // Cannot use the write buffer since - // a) the buffer is too small - // b) it is in use - data := make([]byte, 4+1+4+2+len(arg)) - - copy(data[4+dataOffset:], arg) - - for argLen := len(arg); argLen > 0; argLen -= pktLen - dataOffset { - if dataOffset+argLen < maxLen { - pktLen = dataOffset + argLen - } - - stmt.mc.sequence = 0 - // Add command byte [1 byte] - data[4] = comStmtSendLongData - - // Add stmtID [32 bit] - data[5] = byte(stmt.id) - data[6] = byte(stmt.id >> 8) - data[7] = byte(stmt.id >> 16) - data[8] = byte(stmt.id >> 24) - - // Add paramID [16 bit] - data[9] = byte(paramID) - data[10] = byte(paramID >> 8) - - // Send CMD packet - err := stmt.mc.writePacket(data[:4+pktLen]) - if err == nil { - data = data[pktLen-dataOffset:] - continue - } - return err - - } - - // Reset Packet Sequence - stmt.mc.sequence = 0 - return nil -} - -// Execute Prepared Statement -// http://dev.mysql.com/doc/internals/en/com-stmt-execute.html -func (stmt *mysqlStmt) writeExecutePacket(args []driver.Value) error { - if len(args) != stmt.paramCount { - return fmt.Errorf( - "argument count mismatch (got: %d; has: %d)", - len(args), - stmt.paramCount, - ) - } - - const minPktLen = 4 + 1 + 4 + 1 + 4 - mc := stmt.mc - - // Determine threshold dynamically to avoid packet size shortage. - longDataSize := mc.maxAllowedPacket / (stmt.paramCount + 1) - if longDataSize < 64 { - longDataSize = 64 - } - - // Reset packet-sequence - mc.sequence = 0 - - var data []byte - var err error - - if len(args) == 0 { - data, err = mc.buf.takeBuffer(minPktLen) - } else { - data, err = mc.buf.takeCompleteBuffer() - // In this case the len(data) == cap(data) which is used to optimise the flow below. - } - if err != nil { - // cannot take the buffer. Something must be wrong with the connection - errLog.Print(err) - return errBadConnNoWrite - } - - // command [1 byte] - data[4] = comStmtExecute - - // statement_id [4 bytes] - data[5] = byte(stmt.id) - data[6] = byte(stmt.id >> 8) - data[7] = byte(stmt.id >> 16) - data[8] = byte(stmt.id >> 24) - - // flags (0: CURSOR_TYPE_NO_CURSOR) [1 byte] - data[9] = 0x00 - - // iteration_count (uint32(1)) [4 bytes] - data[10] = 0x01 - data[11] = 0x00 - data[12] = 0x00 - data[13] = 0x00 - - if len(args) > 0 { - pos := minPktLen - - var nullMask []byte - if maskLen, typesLen := (len(args)+7)/8, 1+2*len(args); pos+maskLen+typesLen >= cap(data) { - // buffer has to be extended but we don't know by how much so - // we depend on append after all data with known sizes fit. - // We stop at that because we deal with a lot of columns here - // which makes the required allocation size hard to guess. - tmp := make([]byte, pos+maskLen+typesLen) - copy(tmp[:pos], data[:pos]) - data = tmp - nullMask = data[pos : pos+maskLen] - // No need to clean nullMask as make ensures that. - pos += maskLen - } else { - nullMask = data[pos : pos+maskLen] - for i := range nullMask { - nullMask[i] = 0 - } - pos += maskLen - } - - // newParameterBoundFlag 1 [1 byte] - data[pos] = 0x01 - pos++ - - // type of each parameter [len(args)*2 bytes] - paramTypes := data[pos:] - pos += len(args) * 2 - - // value of each parameter [n bytes] - paramValues := data[pos:pos] - valuesCap := cap(paramValues) - - for i, arg := range args { - // build NULL-bitmap - if arg == nil { - nullMask[i/8] |= 1 << (uint(i) & 7) - paramTypes[i+i] = byte(fieldTypeNULL) - paramTypes[i+i+1] = 0x00 - continue - } - - // cache types and values - switch v := arg.(type) { - case int64: - paramTypes[i+i] = byte(fieldTypeLongLong) - paramTypes[i+i+1] = 0x00 - - if cap(paramValues)-len(paramValues)-8 >= 0 { - paramValues = paramValues[:len(paramValues)+8] - binary.LittleEndian.PutUint64( - paramValues[len(paramValues)-8:], - uint64(v), - ) - } else { - paramValues = append(paramValues, - uint64ToBytes(uint64(v))..., - ) - } - - case float64: - paramTypes[i+i] = byte(fieldTypeDouble) - paramTypes[i+i+1] = 0x00 - - if cap(paramValues)-len(paramValues)-8 >= 0 { - paramValues = paramValues[:len(paramValues)+8] - binary.LittleEndian.PutUint64( - paramValues[len(paramValues)-8:], - math.Float64bits(v), - ) - } else { - paramValues = append(paramValues, - uint64ToBytes(math.Float64bits(v))..., - ) - } - - case bool: - paramTypes[i+i] = byte(fieldTypeTiny) - paramTypes[i+i+1] = 0x00 - - if v { - paramValues = append(paramValues, 0x01) - } else { - paramValues = append(paramValues, 0x00) - } - - case []byte: - // Common case (non-nil value) first - if v != nil { - paramTypes[i+i] = byte(fieldTypeString) - paramTypes[i+i+1] = 0x00 - - if len(v) < longDataSize { - paramValues = appendLengthEncodedInteger(paramValues, - uint64(len(v)), - ) - paramValues = append(paramValues, v...) - } else { - if err := stmt.writeCommandLongData(i, v); err != nil { - return err - } - } - continue - } - - // Handle []byte(nil) as a NULL value - nullMask[i/8] |= 1 << (uint(i) & 7) - paramTypes[i+i] = byte(fieldTypeNULL) - paramTypes[i+i+1] = 0x00 - - case string: - paramTypes[i+i] = byte(fieldTypeString) - paramTypes[i+i+1] = 0x00 - - if len(v) < longDataSize { - paramValues = appendLengthEncodedInteger(paramValues, - uint64(len(v)), - ) - paramValues = append(paramValues, v...) - } else { - if err := stmt.writeCommandLongData(i, []byte(v)); err != nil { - return err - } - } - - case time.Time: - paramTypes[i+i] = byte(fieldTypeString) - paramTypes[i+i+1] = 0x00 - - var a [64]byte - var b = a[:0] - - if v.IsZero() { - b = append(b, "0000-00-00"...) - } else { - b = v.In(mc.cfg.Loc).AppendFormat(b, timeFormat) - } - - paramValues = appendLengthEncodedInteger(paramValues, - uint64(len(b)), - ) - paramValues = append(paramValues, b...) - - default: - return fmt.Errorf("cannot convert type: %T", arg) - } - } - - // Check if param values exceeded the available buffer - // In that case we must build the data packet with the new values buffer - if valuesCap != cap(paramValues) { - data = append(data[:pos], paramValues...) - if err = mc.buf.store(data); err != nil { - errLog.Print(err) - return errBadConnNoWrite - } - } - - pos += len(paramValues) - data = data[:pos] - } - - return mc.writePacket(data) -} - -func (mc *mysqlConn) discardResults() error { - for mc.status&statusMoreResultsExists != 0 { - resLen, err := mc.readResultSetHeaderPacket() - if err != nil { - return err - } - if resLen > 0 { - // columns - if err := mc.readUntilEOF(); err != nil { - return err - } - // rows - if err := mc.readUntilEOF(); err != nil { - return err - } - } - } - return nil -} - -// http://dev.mysql.com/doc/internals/en/binary-protocol-resultset-row.html -func (rows *binaryRows) readRow(dest []driver.Value) error { - data, err := rows.mc.readPacket() - if err != nil { - return err - } - - // packet indicator [1 byte] - if data[0] != iOK { - // EOF Packet - if data[0] == iEOF && len(data) == 5 { - rows.mc.status = readStatus(data[3:]) - rows.rs.done = true - if !rows.HasNextResultSet() { - rows.mc = nil - } - return io.EOF - } - mc := rows.mc - rows.mc = nil - - // Error otherwise - return mc.handleErrorPacket(data) - } - - // NULL-bitmap, [(column-count + 7 + 2) / 8 bytes] - pos := 1 + (len(dest)+7+2)>>3 - nullMask := data[1:pos] - - for i := range dest { - // Field is NULL - // (byte >> bit-pos) % 2 == 1 - if ((nullMask[(i+2)>>3] >> uint((i+2)&7)) & 1) == 1 { - dest[i] = nil - continue - } - - // Convert to byte-coded string - switch rows.rs.columns[i].fieldType { - case fieldTypeNULL: - dest[i] = nil - continue - - // Numeric Types - case fieldTypeTiny: - if rows.rs.columns[i].flags&flagUnsigned != 0 { - dest[i] = int64(data[pos]) - } else { - dest[i] = int64(int8(data[pos])) - } - pos++ - continue - - case fieldTypeShort, fieldTypeYear: - if rows.rs.columns[i].flags&flagUnsigned != 0 { - dest[i] = int64(binary.LittleEndian.Uint16(data[pos : pos+2])) - } else { - dest[i] = int64(int16(binary.LittleEndian.Uint16(data[pos : pos+2]))) - } - pos += 2 - continue - - case fieldTypeInt24, fieldTypeLong: - if rows.rs.columns[i].flags&flagUnsigned != 0 { - dest[i] = int64(binary.LittleEndian.Uint32(data[pos : pos+4])) - } else { - dest[i] = int64(int32(binary.LittleEndian.Uint32(data[pos : pos+4]))) - } - pos += 4 - continue - - case fieldTypeLongLong: - if rows.rs.columns[i].flags&flagUnsigned != 0 { - val := binary.LittleEndian.Uint64(data[pos : pos+8]) - if val > math.MaxInt64 { - dest[i] = uint64ToString(val) - } else { - dest[i] = int64(val) - } - } else { - dest[i] = int64(binary.LittleEndian.Uint64(data[pos : pos+8])) - } - pos += 8 - continue - - case fieldTypeFloat: - dest[i] = math.Float32frombits(binary.LittleEndian.Uint32(data[pos : pos+4])) - pos += 4 - continue - - case fieldTypeDouble: - dest[i] = math.Float64frombits(binary.LittleEndian.Uint64(data[pos : pos+8])) - pos += 8 - continue - - // Length coded Binary Strings - case fieldTypeDecimal, fieldTypeNewDecimal, fieldTypeVarChar, - fieldTypeBit, fieldTypeEnum, fieldTypeSet, fieldTypeTinyBLOB, - fieldTypeMediumBLOB, fieldTypeLongBLOB, fieldTypeBLOB, - fieldTypeVarString, fieldTypeString, fieldTypeGeometry, fieldTypeJSON: - var isNull bool - var n int - dest[i], isNull, n, err = readLengthEncodedString(data[pos:]) - pos += n - if err == nil { - if !isNull { - continue - } else { - dest[i] = nil - continue - } - } - return err - - case - fieldTypeDate, fieldTypeNewDate, // Date YYYY-MM-DD - fieldTypeTime, // Time [-][H]HH:MM:SS[.fractal] - fieldTypeTimestamp, fieldTypeDateTime: // Timestamp YYYY-MM-DD HH:MM:SS[.fractal] - - num, isNull, n := readLengthEncodedInteger(data[pos:]) - pos += n - - switch { - case isNull: - dest[i] = nil - continue - case rows.rs.columns[i].fieldType == fieldTypeTime: - // database/sql does not support an equivalent to TIME, return a string - var dstlen uint8 - switch decimals := rows.rs.columns[i].decimals; decimals { - case 0x00, 0x1f: - dstlen = 8 - case 1, 2, 3, 4, 5, 6: - dstlen = 8 + 1 + decimals - default: - return fmt.Errorf( - "protocol error, illegal decimals value %d", - rows.rs.columns[i].decimals, - ) - } - dest[i], err = formatBinaryTime(data[pos:pos+int(num)], dstlen) - case rows.mc.parseTime: - dest[i], err = parseBinaryDateTime(num, data[pos:], rows.mc.cfg.Loc) - default: - var dstlen uint8 - if rows.rs.columns[i].fieldType == fieldTypeDate { - dstlen = 10 - } else { - switch decimals := rows.rs.columns[i].decimals; decimals { - case 0x00, 0x1f: - dstlen = 19 - case 1, 2, 3, 4, 5, 6: - dstlen = 19 + 1 + decimals - default: - return fmt.Errorf( - "protocol error, illegal decimals value %d", - rows.rs.columns[i].decimals, - ) - } - } - dest[i], err = formatBinaryDateTime(data[pos:pos+int(num)], dstlen) - } - - if err == nil { - pos += int(num) - continue - } else { - return err - } - - // Please report if this happens! - default: - return fmt.Errorf("unknown field type %d", rows.rs.columns[i].fieldType) - } - } - - return nil -} |