/
conn.go
63 lines (54 loc) · 1.15 KB
/
conn.go
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package fly
import (
"net"
)
type Conn struct {
net.Conn
*Cipher
}
func NewConn(con net.Conn, cipher *Cipher) *Conn {
return &Conn{
Conn: con,
Cipher: cipher,
}
}
// dial server and send request addr of client
func DialWithAddr(server, method, key string, addr []byte) *Conn {
conn, err := net.Dial("tcp", server)
if err != nil {
logger.Println("Dial server failed --->", err)
return nil
}
newConn := NewConn(conn, NewCipherInstance(key, method))
if _, err := newConn.Write(addr); err != nil {
logger.Println("write addr to server failed --->", err)
return nil
}
return newConn
}
func (conn *Conn) Write(b []byte) (n int, err error) {
buff := make([]byte, 1024)
if len(buff) > len(b) {
buff = buff[:len(b)]
} else {
buff = make([]byte, len(b))
}
conn.Encrypt(buff, b)
n, err = conn.Conn.Write(buff)
return
}
func (conn *Conn) Read(b []byte) (n int, err error) {
buff := make([]byte, 1024)
n, err = conn.Conn.Read(buff)
//fmt.Println("before", buff[:n])
if n > 0 {
b = b[:n]
conn.Decrypt(b, buff[:n])
//fmt.Println("after", b[:n])
}
return
}
func (conn *Conn) Close() error {
err := conn.Conn.Close()
return err
}