69 lines
1.6 KiB
Go
69 lines
1.6 KiB
Go
package xenserver
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import (
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"fmt"
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"github.com/mitchellh/multistep"
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"github.com/mitchellh/packer/packer"
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"log"
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"net"
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)
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type stepForwardPortOverSSH struct {
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RemotePort func(state multistep.StateBag) (uint, error)
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RemoteDest func(state multistep.StateBag) (string, error)
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HostPortMin uint
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HostPortMax uint
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ResultKey string
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}
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func (self *stepForwardPortOverSSH) Run(state multistep.StateBag) multistep.StepAction {
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config := state.Get("config").(config)
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ui := state.Get("ui").(packer.Ui)
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// Find a free local port:
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log.Printf("Looking for an available port between %d and %d",
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self.HostPortMin,
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self.HostPortMax)
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var sshHostPort uint
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var foundPort bool
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foundPort = false
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for i := self.HostPortMin; i < self.HostPortMax; i++ {
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sshHostPort = i
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log.Printf("Trying port: %d", sshHostPort)
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l, err := net.Listen("tcp", fmt.Sprintf("127.0.0.1:%d", sshHostPort))
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if err == nil {
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l.Close()
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foundPort = true
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break
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}
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}
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if !foundPort {
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log.Fatal("Error: unable to find free host port. Try providing a larger range")
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return multistep.ActionHalt
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}
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ui.Say(fmt.Sprintf("Creating a local port forward over SSH on local port %d", sshHostPort))
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remotePort, _ := self.RemotePort(state)
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remoteDest, _ := self.RemoteDest(state)
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go ssh_port_forward(sshHostPort, remotePort, remoteDest, config.HostIp, config.Username, config.Password)
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ui.Say(fmt.Sprintf("Port forward setup. %d ---> %s:%d on %s", sshHostPort, remoteDest, remotePort, config.HostIp))
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// Provide the local port to future steps.
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state.Put(self.ResultKey, sshHostPort)
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return multistep.ActionContinue
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}
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func (self *stepForwardPortOverSSH) Cleanup(state multistep.StateBag) {}
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