48 lines
890 B
Go
48 lines
890 B
Go
package dns
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import (
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"net"
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"time"
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mdata "github.com/go-gost/core/metadata"
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mdx "github.com/go-gost/x/metadata"
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)
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const (
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defaultTimeout = 5 * time.Second
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defaultBufferSize = 1024
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)
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type metadata struct {
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readTimeout time.Duration
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ttl time.Duration
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timeout time.Duration
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clientIP net.IP
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// nameservers
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dns []string
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}
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func (h *dnsHandler) parseMetadata(md mdata.Metadata) (err error) {
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const (
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readTimeout = "readTimeout"
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ttl = "ttl"
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timeout = "timeout"
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clientIP = "clientIP"
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dns = "dns"
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)
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h.md.readTimeout = mdx.GetDuration(md, readTimeout)
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h.md.ttl = mdx.GetDuration(md, ttl)
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h.md.timeout = mdx.GetDuration(md, timeout)
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if h.md.timeout <= 0 {
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h.md.timeout = defaultTimeout
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}
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sip := mdx.GetString(md, clientIP)
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if sip != "" {
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h.md.clientIP = net.ParseIP(sip)
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}
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h.md.dns = mdx.GetStrings(md, dns)
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return
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}
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