func NewSSHClient(user, addr string, checker *HostKeyChecker, agentForwarding bool) (*SSHForwardingClient, error) {
clientConfig, err := sshClientConfig(user, checker)
if err != nil {
return nil, err
}
var client *gossh.Client
dialFunc := func(echan chan error) {
var err error
client, err = gossh.Dial("tcp", addr, clientConfig)
echan <- err
}
err = timeoutSSHDial(dialFunc)
if err != nil {
return nil, err
}
return newSSHForwardingClient(client, agentForwarding)
}
func NewTunnelledSSHClient(user, tunaddr, tgtaddr string, checker *HostKeyChecker, agentForwarding bool) (*SSHForwardingClient, error) {
clientConfig, err := sshClientConfig(user, checker)
if err != nil {
return nil, err
}
tunaddr = maybeAddDefaultPort(tunaddr)
tgtaddr = maybeAddDefaultPort(tgtaddr)
var tunnelClient *gossh.Client
dialFunc := func(echan chan error) {
var err error
tunnelClient, err = gossh.Dial("tcp", tunaddr, clientConfig)
echan <- err
}
err = timeoutSSHDial(dialFunc)
if err != nil {
return nil, err
}
var targetConn net.Conn
dialFunc = func(echan chan error) {
tgtTCPAddr, err := net.ResolveTCPAddr("tcp", tgtaddr)
if err != nil {
echan <- err
return
}
targetConn, err = tunnelClient.DialTCP("tcp", nil, tgtTCPAddr)
echan <- err
}
err = timeoutSSHDial(dialFunc)
if err != nil {
return nil, err
}
c, chans, reqs, err := gossh.NewClientConn(targetConn, tgtaddr, clientConfig)
if err != nil {
return nil, err
}
return newSSHForwardingClient(gossh.NewClient(c, chans, reqs), agentForwarding)
}