5b844b5017
* plugin/forward: add it This moves coredns/forward into CoreDNS. Fixes as a few bugs, adds a policy option and more tests to the plugin. Update the documentation, test IPv6 address and add persistent tests. * Always use random policy when spraying * include scrub fix here as well * use correct var name * Code review * go vet * Move logging to metrcs * Small readme updates * Fix readme
44 lines
777 B
Go
44 lines
777 B
Go
package forward
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import (
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"crypto/tls"
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"sync"
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"time"
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"github.com/miekg/dns"
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)
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type host struct {
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addr string
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client *dns.Client
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tlsConfig *tls.Config
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expire time.Duration
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fails uint32
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sync.RWMutex
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checking bool
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}
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// newHost returns a new host, the fails are set to 1, i.e.
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// the first healthcheck must succeed before we use this host.
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func newHost(addr string) *host {
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return &host{addr: addr, fails: 1, expire: defaultExpire}
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}
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// setClient sets and configures the dns.Client in host.
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func (h *host) SetClient() {
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c := new(dns.Client)
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c.Net = "udp"
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c.ReadTimeout = 2 * time.Second
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c.WriteTimeout = 2 * time.Second
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if h.tlsConfig != nil {
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c.Net = "tcp-tls"
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c.TLSConfig = h.tlsConfig
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}
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h.client = c
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}
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const defaultExpire = 10 * time.Second
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