/
connection_manager.go
53 lines (44 loc) · 1.12 KB
/
connection_manager.go
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package gomahawk
import (
"errors"
"net"
"sync"
)
type connectionManager struct {
connections map[*connection]*net.TCPConn
sync.Mutex
}
func newConnectionManager() *connectionManager {
cm := new(connectionManager)
cm.connections = make(map[*connection]*net.TCPConn)
return cm
}
func (cm *connectionManager) copyConnection(conn *connection) (*connection, error) {
tcpConn, ok := cm.connections[conn]
if !ok {
return nil, errors.New("not registered connection tried to be copied")
}
tcpLAddr, err := net.ResolveTCPAddr("tcp", tcpConn.LocalAddr().String())
if err != nil {
return nil, err
}
tcpLAddr.Port = 0
tcpRAddr, err := net.ResolveTCPAddr("tcp", tcpConn.RemoteAddr().String())
if err != nil {
return nil, err
}
tcpRAddr.Port = 50210 // hardcoded
newTCPConn, err := net.DialTCP("tcp", tcpLAddr, tcpRAddr)
if err != nil {
return nil, err
}
return cm.registerConnection(newTCPConn), nil
}
func (cm *connectionManager) registerConnection(tcpConn *net.TCPConn) (conn *connection) {
cm.Lock()
defer cm.Unlock()
conn = new(connection)
conn.conn = tcpConn
cm.connections[conn] = tcpConn
return conn
}