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crane_terminal.go
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crane_terminal.go
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package docks
import (
"net"
"github.com/safing/portbase/container"
"github.com/safing/spn/hub"
"github.com/safing/spn/terminal"
)
// CraneTerminal is a terminal started by a crane.
type CraneTerminal struct {
*terminal.TerminalBase
// Add-Ons
terminal.SessionAddOn
crane *Crane
}
// NewLocalCraneTerminal returns a new local crane terminal.
func NewLocalCraneTerminal(
crane *Crane,
remoteHub *hub.Hub,
initMsg *terminal.TerminalOpts,
) (*CraneTerminal, *container.Container, *terminal.Error) {
// Create Terminal Base.
t, initData, err := terminal.NewLocalBaseTerminal(
crane.ctx,
crane.getNextTerminalID(),
crane.ID,
remoteHub,
initMsg,
crane,
)
if err != nil {
return nil, nil, err
}
return initCraneTerminal(crane, t), initData, nil
}
// NewRemoteCraneTerminal returns a new remote crane terminal.
func NewRemoteCraneTerminal(
crane *Crane,
id uint32,
initData *container.Container,
) (*CraneTerminal, *terminal.TerminalOpts, *terminal.Error) {
// Create Terminal Base.
t, initMsg, err := terminal.NewRemoteBaseTerminal(
crane.ctx,
id,
crane.ID,
crane.identity,
initData,
crane,
)
if err != nil {
return nil, nil, err
}
return initCraneTerminal(crane, t), initMsg, nil
}
func initCraneTerminal(
crane *Crane,
t *terminal.TerminalBase,
) *CraneTerminal {
// Create Crane Terminal and assign it as the extended Terminal.
ct := &CraneTerminal{
TerminalBase: t,
crane: crane,
}
t.SetTerminalExtension(ct)
// Start workers.
t.StartWorkers(module, "crane terminal")
return ct
}
// GrantPermission grants the given permissions.
// Additionally, it will mark the crane as authenticated, if not public.
func (t *CraneTerminal) GrantPermission(grant terminal.Permission) {
// Forward granted permission to base terminal.
t.TerminalBase.GrantPermission(grant)
// Mark crane as authenticated if not public or already authenticated.
if !t.crane.Public() && !t.crane.Authenticated() {
t.crane.authenticated.Set()
// Submit metrics.
newAuthenticatedCranes.Inc()
}
}
// LocalAddr returns the crane's local address.
func (t *CraneTerminal) LocalAddr() net.Addr {
return t.crane.LocalAddr()
}
// RemoteAddr returns the crane's remote address.
func (t *CraneTerminal) RemoteAddr() net.Addr {
return t.crane.RemoteAddr()
}
// Transport returns the crane's transport.
func (t *CraneTerminal) Transport() *hub.Transport {
return t.crane.Transport()
}
// IsBeingAbandoned returns whether the terminal is being abandoned.
func (t *CraneTerminal) IsBeingAbandoned() bool {
return t.Abandoning.IsSet()
}
// HandleDestruction gives the terminal the ability to clean up.
// The terminal has already fully shut down at this point.
// Should never be called directly. Call Abandon() instead.
func (t *CraneTerminal) HandleDestruction(err *terminal.Error) {
t.crane.AbandonTerminal(t.ID(), err)
}