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transport.go
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transport.go
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package electrum
import (
"bufio"
"context"
"crypto/tls"
"log"
"net"
"time"
)
// TCPTransport store information about the TCP transport.
type TCPTransport struct {
conn net.Conn
responses chan []byte
errors chan error
}
// NewTCPTransport opens a new TCP connection to the remote server.
func NewTCPTransport(ctx context.Context, addr string) (*TCPTransport, error) {
var d net.Dialer
conn, err := d.DialContext(ctx, "tcp", addr)
if err != nil {
return nil, err
}
tcp := &TCPTransport{
conn: conn,
responses: make(chan []byte),
errors: make(chan error),
}
go tcp.listen()
return tcp, nil
}
// NewSSLTransport opens a new SSL connection to the remote server.
func NewSSLTransport(ctx context.Context, addr string, config *tls.Config) (*TCPTransport, error) {
dialer := tls.Dialer{
NetDialer: &net.Dialer{},
Config: config,
}
conn, err := dialer.DialContext(ctx, "tcp", addr)
if err != nil {
return nil, err
}
tcp := &TCPTransport{
conn: conn,
responses: make(chan []byte),
errors: make(chan error),
}
go tcp.listen()
return tcp, nil
}
func (t *TCPTransport) listen() {
defer t.conn.Close()
reader := bufio.NewReader(t.conn)
for {
line, err := reader.ReadBytes(nl)
if err != nil {
t.errors <- err
break
}
if DebugMode {
log.Printf("%s [debug] %s -> %s", time.Now().Format("2006-01-02 15:04:05"), t.conn.RemoteAddr(), line)
}
t.responses <- line
}
}
// SendMessage sends a message to the remote server through the TCP transport.
func (t *TCPTransport) SendMessage(body []byte) error {
if DebugMode {
log.Printf("%s [debug] %s <- %s", time.Now().Format("2006-01-02 15:04:05"), t.conn.RemoteAddr(), body)
}
_, err := t.conn.Write(body)
return err
}
// Responses returns chan to TCP transport responses.
func (t *TCPTransport) Responses() <-chan []byte {
return t.responses
}
// Errors returns chan to TCP transport errors.
func (t *TCPTransport) Errors() <-chan error {
return t.errors
}
func (t *TCPTransport) Close() error {
return t.conn.Close()
}