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net/{neterror,dns/resolver}: move PacketWasTruncated to neterror from DNS code

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And delete the unused code in net/dns/resolver/neterr_*.go.

Change-Id: Ibe62c486bacce2733eb9968c96a98cbbdb2758bd
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2022-01-03 10:49:56 -08:00
committed by Brad Fitzpatrick
parent dd45bba76b
commit 2513d2d728
6 changed files with 37 additions and 90 deletions
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3
net/dns/resolver/forwarder.go
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@ -25,6 +25,7 @@ import (
dns "golang.org/x/net/dns/dnsmessage"
"inet.af/netaddr"
"tailscale.com/hostinfo"
"tailscale.com/net/neterror"
"tailscale.com/net/netns"
"tailscale.com/net/tsdial"
"tailscale.com/types/dnstype"
@ -482,7 +483,7 @@ func (f *forwarder) send(ctx context.Context, fq *forwardQuery, rr resolverAndDe
if err := ctx.Err(); err != nil {
return nil, err
}
if packetWasTruncated(err) {
if neterror.PacketWasTruncated(err) {
err = nil
} else {
metricDNSFwdUDPErrorRead.Add(1)