(resolveExpiry time.Duration)
| 66 | } |
| 67 | |
| 68 | func (ep *DynamicEndpoint) Refresh(resolveExpiry time.Duration) (netip.AddrPort, error) { |
| 69 | // 1. Try to parse as AddrPort directly |
| 70 | if ap, err := netip.ParseAddrPort(ep.Value); err == nil { |
| 71 | return ap, nil |
| 72 | } |
| 73 | |
| 74 | ep.rw.RLock() |
| 75 | // if this endpoint is down, we will refresh every EndpointResolveDelay |
| 76 | if time.Since(ep.lastUpdate) < resolveExpiry && ep.lastValue != (netip.AddrPort{}) { |
| 77 | ep.rw.RUnlock() |
| 78 | return ep.lastValue, nil |
| 79 | } |
| 80 | ep.rw.RUnlock() |
| 81 | |
| 82 | host, port, err := ep.Parse() |
| 83 | if err != nil { |
| 84 | return netip.AddrPort{}, err |
| 85 | } |
| 86 | |
| 87 | ctx, cancel := context.WithTimeout(context.Background(), time.Second*5) |
| 88 | defer cancel() |
| 89 | |
| 90 | // 2. Try SRV lookup |
| 91 | target, srvPort, err := ResolveSRV(ctx, "nylon", "udp", host) |
| 92 | if err == nil { |
| 93 | addrs, err := ResolveName(ctx, target) |
| 94 | if err == nil && len(addrs) > 0 { |
| 95 | ep.rw.Lock() |
| 96 | defer ep.rw.Unlock() |
| 97 | ep.lastUpdate = time.Now() |
| 98 | ep.lastValue = netip.AddrPortFrom(addrs[0], srvPort) |
| 99 | return ep.lastValue, nil |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | // 3. Normal A/AAAA lookup |
| 104 | addrs, err := ResolveName(ctx, host) |
| 105 | if err != nil { |
| 106 | return netip.AddrPort{}, err |
| 107 | } |
| 108 | if len(addrs) == 0 { |
| 109 | return netip.AddrPort{}, fmt.Errorf("no addresses found for %s", host) |
| 110 | } |
| 111 | |
| 112 | ep.rw.Lock() |
| 113 | defer ep.rw.Unlock() |
| 114 | ep.lastUpdate = time.Now() |
| 115 | ep.lastValue = netip.AddrPortFrom(addrs[0], port) |
| 116 | return ep.lastValue, nil |
| 117 | } |
| 118 | |
| 119 | func (ep *DynamicEndpoint) Get() (netip.AddrPort, error) { |
| 120 | if ap, err := netip.ParseAddrPort(ep.Value); err == nil { |
no test coverage detected