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net/netcheck: add an informative payload in the netcheck UDP helper packets

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Per comment from @normanr:
0a5ab533c1 (r40401954)

Updates #188
This commit is contained in:
Brad Fitzpatrick 2020-07-06 09:55:11 -07:00
parent 0a5ab533c1
commit cf74e9039e
1 changed files with 1 additions and 1 deletions
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2
net/netcheck/netcheck.go
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@ -682,7 +682,7 @@ func (c *Client) GetReport(ctx context.Context, dm *tailcfg.DERPMap) (*Report, e
// So do that for now. In the future we might want to classify networks
// that do and don't require this separately. But for now help it.
const documentationIP = "203.0.113.1"
rs.pc4Hair.WriteTo([]byte("sets up mapping"), &net.UDPAddr{IP: net.ParseIP(documentationIP), Port: 12345})
rs.pc4Hair.WriteTo([]byte("tailscale netcheck; see https://github.com/tailscale/tailscale/issues/188"), &net.UDPAddr{IP: net.ParseIP(documentationIP), Port: 12345})
if f := c.GetSTUNConn4; f != nil {
rs.pc4 = f()