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multiplex_conn.go
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/
multiplex_conn.go
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package internal
import (
"net"
"sync"
"time"
"github.com/andyollylarkin/smudge-custom-transport"
"github.com/andyollylarkin/smudge-custom-transport/transport"
)
type readData struct {
readed int
readedFrom transport.SockAddr
err error
data []byte
}
type MultiplexConn struct {
laddr transport.SockAddr
wg sync.WaitGroup
dataChan chan readData
onCloseChan chan struct{}
connChan chan *WsConnAdapter
connErrorChan chan net.Addr
logger smudge.Logger
}
func NewMuxConn(laddr transport.SockAddr, logger smudge.Logger) (*MultiplexConn, chan net.Addr) {
connErrChan := make(chan net.Addr)
c := &MultiplexConn{
laddr: laddr,
wg: sync.WaitGroup{},
dataChan: make(chan readData),
onCloseChan: make(chan struct{}),
connChan: make(chan *WsConnAdapter),
connErrorChan: connErrChan,
logger: logger,
}
go c.handleLoop()
return c, connErrChan
}
func (mc *MultiplexConn) HandleNewConn(conn *WsConnAdapter) {
mc.connChan <- conn
}
func (mc *MultiplexConn) handleLoop() {
for {
select {
case conn := <-mc.connChan:
go mc.handleRead(conn)
case <-mc.onCloseChan:
return
}
}
}
func (mc *MultiplexConn) handleRead(conn *WsConnAdapter) {
buf := make([]byte, smudge.ReadBufSize)
for {
n, err := conn.Read(buf)
if err != nil {
mc.connErrorChan <- conn.RemoteAddr()
return
}
tcpaddr, err := net.ResolveTCPAddr("tcp", conn.RemoteAddr().String())
mc.dataChan <- readData{
readed: n,
readedFrom: &WsAddr{WsAddrTCP: *tcpaddr},
err: err,
data: buf,
}
}
}
// Read reads data from the connection.
// Read can be made to time out and return an error after a fixed
// time limit; see SetDeadline and SetReadDeadline.
func (mc *MultiplexConn) Read(b []byte) (n int, err error) {
panic("not implemented") // TODO: Implement
}
// Write writes data to the connection.
// Write can be made to time out and return an error after a fixed
// time limit; see SetDeadline and SetWriteDeadline.
func (mc *MultiplexConn) Write(b []byte) (n int, err error) {
panic("not implemented") // TODO: Implement
}
// Close closes the connection.
// Any blocked Read or Write operations will be unblocked and return errors.
func (mc *MultiplexConn) Close() error {
close(mc.onCloseChan)
return nil
}
// LocalAddr returns the local network address, if known.
func (mc *MultiplexConn) LocalAddr() net.Addr {
return mc.laddr
}
// RemoteAddr returns the remote network address, if known.
func (mc *MultiplexConn) RemoteAddr() net.Addr {
return nil
}
// SetDeadline sets the read and write deadlines associated
// with the connection. It is equivalent to calling both
// SetReadDeadline and SetWriteDeadline.
//
// A deadline is an absolute time after which I/O operations
// fail instead of blocking. The deadline applies to all future
// and pending I/O, not just the immediately following call to
// Read or Write. After a deadline has been exceeded, the
// connection can be refreshed by setting a deadline in the future.
//
// If the deadline is exceeded a call to Read or Write or to other
// I/O methods will return an error that wraps os.ErrDeadlineExceeded.
// This can be tested using errors.Is(err, os.ErrDeadlineExceeded).
// The error's Timeout method will return true, but note that there
// are other possible errors for which the Timeout method will
// return true even if the deadline has not been exceeded.
//
// An idle timeout can be implemented by repeatedly extending
// the deadline after successful Read or Write calls.
//
// A zero value for t means I/O operations will not time out.
func (mc *MultiplexConn) SetDeadline(t time.Time) error {
return nil
}
// SetReadDeadline sets the deadline for future Read calls
// and any currently-blocked Read call.
// A zero value for t means Read will not time out.
func (mc *MultiplexConn) SetReadDeadline(t time.Time) error {
return nil
}
// SetWriteDeadline sets the deadline for future Write calls
// and any currently-blocked Write call.
// Even if write times out, it may return n > 0, indicating that
// some of the data was successfully written.
// A zero value for t means Write will not time out.
func (mc *MultiplexConn) SetWriteDeadline(t time.Time) error {
return nil
}
func (mc *MultiplexConn) ReadFrom(b []byte) (n int, addr transport.SockAddr, error error) {
data := <-mc.dataChan
copy(b, data.data)
return data.readed, data.readedFrom, data.err
}