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wgengine/magicsock: restore allocation-free endpoint.DstToString (#5971)

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The wireguard-go code unfortunately calls this unconditionally
even when verbose logging is disabled.

Partial revert of #5911.

Signed-off-by: Joe Tsai <joetsai@digital-static.net>
This commit is contained in:
Joe Tsai 2022-10-17 13:22:48 -07:00 committed by GitHub
parent 45b7e8c23c
commit 14100c0985
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1 changed files with 6 additions and 4 deletions
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10
wgengine/magicsock/magicsock.go
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@ -2400,6 +2400,7 @@ func (c *Conn) SetNetworkMap(nm *netmap.NetworkMap) {
ep := &endpoint{
c: c,
publicKey: n.Key,
publicKeyHex: n.Key.UntypedHexString(),
sentPing: map[stun.TxID]sentPing{},
endpointState: map[netip.AddrPort]*endpointState{},
heartbeatDisabled: heartbeatDisabled,
@ -3312,9 +3313,10 @@ type endpoint struct {
numStopAndResetAtomic int64
// These fields are initialized once and never modified.
c *Conn
publicKey key.NodePublic // peer public key (for WireGuard + DERP)
fakeWGAddr netip.AddrPort // the UDP address we tell wireguard-go we're using
c *Conn
publicKey key.NodePublic // peer public key (for WireGuard + DERP)
publicKeyHex string // cached output of publicKey.UntypedHexString
fakeWGAddr netip.AddrPort // the UDP address we tell wireguard-go we're using
// mu protects all following fields.
mu sync.Mutex // Lock ordering: Conn.mu, then endpoint.mu
@ -3496,7 +3498,7 @@ func (de *endpoint) String() string {
func (de *endpoint) ClearSrc() {}
func (de *endpoint) SrcToString() string { panic("unused") } // unused by wireguard-go
func (de *endpoint) SrcIP() netip.Addr { panic("unused") } // unused by wireguard-go
func (de *endpoint) DstToString() string { return de.publicKey.UntypedHexString() }
func (de *endpoint) DstToString() string { return de.publicKeyHex }
func (de *endpoint) DstIP() netip.Addr { panic("unused") }
func (de *endpoint) DstToBytes() []byte { return packIPPort(de.fakeWGAddr) }