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sockstats: switch label to enum

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Makes it cheaper/simpler to persist values, and encourages reuse of
labels as opposed to generating an arbitrary number.

Updates tailscale/corp#9230
Updates #3363

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
This commit is contained in:
Mihai Parparita
2023-03-06 15:35:50 -08:00
committed by Mihai Parparita
parent 9687f3700d
commit 6ac6ddbb47
13 changed files with 83 additions and 22 deletions
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4
net/dns/resolver/forwarder.go
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@ -407,7 +407,7 @@ func (f *forwarder) getKnownDoHClientForProvider(urlBase string) (c *http.Client
const dohType = "application/dns-message"
func (f *forwarder) sendDoH(ctx context.Context, urlBase string, c *http.Client, packet []byte) ([]byte, error) {
ctx = sockstats.WithSockStats(ctx, "dns.forwarder:doh")
ctx = sockstats.WithSockStats(ctx, sockstats.LabelDNSForwarderDoH)
metricDNSFwdDoH.Add(1)
req, err := http.NewRequestWithContext(ctx, "POST", urlBase, bytes.NewReader(packet))
if err != nil {
@ -487,7 +487,7 @@ func (f *forwarder) sendUDP(ctx context.Context, fq *forwardQuery, rr resolverAn
return nil, fmt.Errorf("unrecognized resolver type %q", rr.name.Addr)
}
metricDNSFwdUDP.Add(1)
ctx = sockstats.WithSockStats(ctx, "dns.forwarder:udp")
ctx = sockstats.WithSockStats(ctx, sockstats.LabelDNSForwarderUDP)
ln, err := f.packetListener(ipp.Addr())
if err != nil {