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- DNS: fix race in WriteDiskConfig()

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This commit is contained in:
Simon Zolin 2019-12-12 15:04:29 +03:00
parent 000e842f7b
commit ef57f7e192
1 changed files with 14 additions and 1 deletions
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15
dnsforward/dnsforward.go
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@ -86,10 +86,23 @@ func (s *Server) Close() {
s.Unlock()
}
func stringArrayDup(a []string) []string {
a2 := make([]string, len(a))
copy(a2, a)
return a2
}
// WriteDiskConfig - write configuration
func (s *Server) WriteDiskConfig(c *FilteringConfig) {
s.Lock()
*c = s.conf.FilteringConfig
sc := s.conf.FilteringConfig
*c = sc
c.RatelimitWhitelist = stringArrayDup(sc.RatelimitWhitelist)
c.BootstrapDNS = stringArrayDup(sc.BootstrapDNS)
c.AllowedClients = stringArrayDup(sc.AllowedClients)
c.DisallowedClients = stringArrayDup(sc.DisallowedClients)
c.BlockedHosts = stringArrayDup(sc.BlockedHosts)
c.UpstreamDNS = stringArrayDup(sc.UpstreamDNS)
s.Unlock()
}