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Fix relay migration panic by covering every possible relay state (#1414)

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brad-defined 2025-07-02 08:48:02 -04:00 committed by GitHub
parent b158eb0c4c
commit 94142aded5
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1 changed files with 21 additions and 15 deletions
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36
connection_manager.go
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@ -4,6 +4,7 @@ import (
"bytes"
"context"
"encoding/binary"
"fmt"
"net/netip"
"sync"
"time"
@ -227,21 +228,25 @@ func (n *connectionManager) migrateRelayUsed(oldhostinfo, newhostinfo *HostInfo)
var relayFrom netip.Addr
var relayTo netip.Addr
switch {
case ok && existing.State == Established:
// This relay already exists in newhostinfo, then do nothing.
continue
case ok && existing.State == Requested:
// The relay exists in a Requested state; re-send the request
index = existing.LocalIndex
switch r.Type {
case TerminalType:
relayFrom = n.intf.myVpnAddrs[0]
relayTo = existing.PeerAddr
case ForwardingType:
relayFrom = existing.PeerAddr
relayTo = newhostinfo.vpnAddrs[0]
default:
// should never happen
case ok:
switch existing.State {
case Established, PeerRequested, Disestablished:
// This relay already exists in newhostinfo, then do nothing.
continue
case Requested:
// The relay exists in a Requested state; re-send the request
index = existing.LocalIndex
switch r.Type {
case TerminalType:
relayFrom = n.intf.myVpnAddrs[0]
relayTo = existing.PeerAddr
case ForwardingType:
relayFrom = existing.PeerAddr
relayTo = newhostinfo.vpnAddrs[0]
default:
// should never happen
panic(fmt.Sprintf("Migrating unknown relay type: %v", r.Type))
}
}
case !ok:
n.relayUsedLock.RLock()
@ -267,6 +272,7 @@ func (n *connectionManager) migrateRelayUsed(oldhostinfo, newhostinfo *HostInfo)
relayTo = newhostinfo.vpnAddrs[0]
default:
// should never happen
panic(fmt.Sprintf("Migrating unknown relay type: %v", r.Type))
}
}