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net/portmapper: make pcpCodeNotAuthorized log more descriptive

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If PCP is present but disabled, turning it on might help
get direct connections.

Signed-off-by: Denton Gentry <dgentry@tailscale.com>
(cherry picked from commit de4c635e54)
This commit is contained in:
Denton Gentry 2022-06-10 22:13:24 -07:00 committed by Denton Gentry
parent e7d5d90037
commit b39592f68a
1 changed files with 3 additions and 0 deletions
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3
net/portmapper/pcp.go
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@ -115,6 +115,9 @@ func parsePCPMapResponse(resp []byte) (*pcpMapping, error) {
if !ok {
return nil, fmt.Errorf("Invalid PCP common header")
}
if res.ResultCode == pcpCodeNotAuthorized {
return nil, fmt.Errorf("PCP is implemented but not enabled in the router")
}
if res.ResultCode != pcpCodeOK {
return nil, fmt.Errorf("PCP response not ok, code %d", res.ResultCode)
}