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path: root/tde/tde.go
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package tde

import (
	"encoding/binary"
	"io"
	"net"
)

const maxLen = 240 // max PDU len incl. header

type Conn struct{ net.Conn }

func (c Conn) Write(p []byte) (n int, err error) {
	size := uint16(len(p))
	if err := binary.Write(c.Conn, binary.BigEndian, size); err != nil {
		return 0, err
	}
	return c.Conn.Write(p)
}

func (c Conn) Read(p []byte) (n int, err error) {
	var size uint16
	if err := binary.Read(c.Conn, binary.BigEndian, &size); err != nil {
		return 0, err
	}
	return c.Conn.Read(p[:size])
}

func ReadAll(r io.Reader) ([]byte, error) {
	p := make([]byte, maxLen)
	n, err := r.Read(p)
	return p[:n], err
}

func Dial(service string) (Conn, error) {
	conn, err := net.Dial("tcp", service)
	if err != nil {
		return Conn{}, err
	}
	return Conn{conn}, nil
}