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authorzelig <viktor.tron@gmail.com>2014-12-15 02:38:46 +0800
committerzelig <viktor.tron@gmail.com>2014-12-15 04:31:43 +0800
commite847aaca3eff9f7ecd45426ad335d55bcdf4c4ae (patch)
treeaa4224654942152f8ed147554b90630fb449d623 /wire/messaging.go
parent7d02c4fdb7abc6c35f9b9c593cbbfc524d92f6e0 (diff)
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remove wire package
Diffstat (limited to 'wire/messaging.go')
-rw-r--r--wire/messaging.go178
1 files changed, 0 insertions, 178 deletions
diff --git a/wire/messaging.go b/wire/messaging.go
deleted file mode 100644
index 9c6cb5944..000000000
--- a/wire/messaging.go
+++ /dev/null
@@ -1,178 +0,0 @@
-// Package wire provides low level access to the Ethereum network and allows
-// you to broadcast data over the network.
-package wire
-
-import (
- "bytes"
- "fmt"
- "net"
- "time"
-
- "github.com/ethereum/go-ethereum/ethutil"
-)
-
-// Connection interface describing the methods required to implement the wire protocol.
-type Conn interface {
- Write(typ MsgType, v ...interface{}) error
- Read() *Msg
-}
-
-// The magic token which should be the first 4 bytes of every message and can be used as separator between messages.
-var MagicToken = []byte{34, 64, 8, 145}
-
-type MsgType byte
-
-const (
- // Values are given explicitly instead of by iota because these values are
- // defined by the wire protocol spec; it is easier for humans to ensure
- // correctness when values are explicit.
- MsgHandshakeTy = 0x00
- MsgDiscTy = 0x01
- MsgPingTy = 0x02
- MsgPongTy = 0x03
- MsgGetPeersTy = 0x04
- MsgPeersTy = 0x05
-
- MsgStatusTy = 0x10
- MsgTxTy = 0x12
- MsgGetBlockHashesTy = 0x13
- MsgBlockHashesTy = 0x14
- MsgGetBlocksTy = 0x15
- MsgBlockTy = 0x16
- MsgNewBlockTy = 0x17
-)
-
-var msgTypeToString = map[MsgType]string{
- MsgHandshakeTy: "Handshake",
- MsgDiscTy: "Disconnect",
- MsgPingTy: "Ping",
- MsgPongTy: "Pong",
- MsgGetPeersTy: "Get peers",
- MsgStatusTy: "Status",
- MsgPeersTy: "Peers",
- MsgTxTy: "Transactions",
- MsgBlockTy: "Blocks",
- //MsgGetTxsTy: "Get Txs",
- MsgGetBlockHashesTy: "Get block hashes",
- MsgBlockHashesTy: "Block hashes",
- MsgGetBlocksTy: "Get blocks",
-}
-
-func (mt MsgType) String() string {
- return msgTypeToString[mt]
-}
-
-type Msg struct {
- Type MsgType // Specifies how the encoded data should be interpreted
- //Data []byte
- Data *ethutil.Value
-}
-
-func NewMessage(msgType MsgType, data interface{}) *Msg {
- return &Msg{
- Type: msgType,
- Data: ethutil.NewValue(data),
- }
-}
-
-type Messages []*Msg
-
-// The basic message reader waits for data on the given connection, decoding
-// and doing a few sanity checks such as if there's a data type and
-// unmarhals the given data
-func ReadMessages(conn net.Conn) (msgs []*Msg, err error) {
- // The recovering function in case anything goes horribly wrong
- defer func() {
- if r := recover(); r != nil {
- err = fmt.Errorf("wire.ReadMessage error: %v", r)
- }
- }()
-
- var (
- buff []byte
- messages [][]byte
- msgLength int
- )
-
- for {
- // Give buffering some time
- conn.SetReadDeadline(time.Now().Add(5 * time.Millisecond))
- // Create a new temporarily buffer
- b := make([]byte, 1440)
- n, _ := conn.Read(b)
- if err != nil && n == 0 {
- if err.Error() != "EOF" {
- fmt.Println("err now", err)
- return nil, err
- } else {
- break
- }
- }
-
- if n == 0 && len(buff) == 0 {
- // If there's nothing on the wire wait for a bit
- time.Sleep(200 * time.Millisecond)
-
- continue
- }
-
- buff = append(buff, b[:n]...)
- if msgLength == 0 {
- // Check if the received 4 first bytes are the magic token
- if bytes.Compare(MagicToken, buff[:4]) != 0 {
- return nil, fmt.Errorf("MagicToken mismatch. Received %v", buff[:4])
- }
-
- // Read the length of the message
- msgLength = int(ethutil.BytesToNumber(buff[4:8]))
-
- // Remove the token and length
- buff = buff[8:]
- }
-
- if len(buff) >= msgLength {
- messages = append(messages, buff[:msgLength])
- buff = buff[msgLength:]
- msgLength = 0
-
- if len(buff) == 0 {
- break
- }
- }
- }
-
- for _, m := range messages {
- decoder := ethutil.NewValueFromBytes(m)
- // Type of message
- t := decoder.Get(0).Uint()
- // Actual data
- d := decoder.SliceFrom(1)
-
- msgs = append(msgs, &Msg{Type: MsgType(t), Data: d})
- }
-
- return
-}
-
-// The basic message writer takes care of writing data over the given
-// connection and does some basic error checking
-func WriteMessage(conn net.Conn, msg *Msg) error {
- var pack []byte
-
- // Encode the type and the (RLP encoded) data for sending over the wire
- encoded := ethutil.NewValue(append([]interface{}{byte(msg.Type)}, msg.Data.Slice()...)).Encode()
- payloadLength := ethutil.NumberToBytes(uint32(len(encoded)), 32)
-
- // Write magic token and payload length (first 8 bytes)
- pack = append(MagicToken, payloadLength...)
- pack = append(pack, encoded...)
- //fmt.Printf("payload %v (%v) %q\n", msg.Type, conn.RemoteAddr(), encoded)
-
- // Write to the connection
- _, err := conn.Write(pack)
- if err != nil {
- return err
- }
-
- return nil
-}