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wgengine/magicsock: move discoKey fields to the mutex-protected section.

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Fixes #3106

Signed-off-by: David Anderson <danderson@tailscale.com>
(cherry picked from commit 521b44e653)
This commit is contained in:
David Anderson 2021-10-18 10:14:42 -07:00 committed by Brad Fitzpatrick
parent cb0d784a79
commit ee02c95259
1 changed files with 6 additions and 5 deletions
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5
wgengine/magicsock/magicsock.go
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@ -3105,14 +3105,15 @@ type endpoint struct {
// These fields are initialized once and never modified.
c *Conn
publicKey tailcfg.NodeKey // peer public key (for WireGuard + DERP)
discoKey tailcfg.DiscoKey // for discovery messages. IsZero() if peer can't disco.
discoShort string // ShortString of discoKey. Empty if peer can't disco.
fakeWGAddr netaddr.IPPort // the UDP address we tell wireguard-go we're using
wgEndpoint string // string from ParseEndpoint, holds a JSON-serialized wgcfg.Endpoints
// mu protects all following fields.
mu sync.Mutex // Lock ordering: Conn.mu, then endpoint.mu
discoKey tailcfg.DiscoKey // for discovery messages. IsZero() if peer can't disco.
discoShort string // ShortString of discoKey. Empty if peer can't disco.
heartBeatTimer *time.Timer // nil when idle
lastSend mono.Time // last time there was outgoing packets sent to this peer (from wireguard-go)
lastFullPing mono.Time // last time we pinged all endpoints