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tailcfg: NetInfo.String: handle nil object without panicing

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Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
This commit is contained in:
David Crawshaw 2020-03-23 13:34:09 +11:00
parent b6f77cc48d
commit e60b433831
1 changed files with 3 additions and 0 deletions
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3
tailcfg/tailcfg.go
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@ -286,6 +286,9 @@ type NetInfo struct {
} }
func (ni *NetInfo) String() string { func (ni *NetInfo) String() string {
if ni == nil {
return "NetInfo(nil)"
}
return fmt.Sprintf("NetInfo{varies=%v hairpin=%v ipv6=%v udp=%v derp=#%v link=%q}", return fmt.Sprintf("NetInfo{varies=%v hairpin=%v ipv6=%v udp=%v derp=#%v link=%q}",
ni.MappingVariesByDestIP, ni.HairPinning, ni.WorkingIPv6, ni.MappingVariesByDestIP, ni.HairPinning, ni.WorkingIPv6,
ni.WorkingUDP, ni.PreferredDERP, ni.LinkType) ni.WorkingUDP, ni.PreferredDERP, ni.LinkType)