49 lines
1018 B
Go
49 lines
1018 B
Go
package dns
|
|
|
|
import (
|
|
"net"
|
|
"strings"
|
|
"time"
|
|
|
|
mdata "github.com/go-gost/gost/pkg/metadata"
|
|
)
|
|
|
|
type metadata struct {
|
|
readTimeout time.Duration
|
|
ttl time.Duration
|
|
timeout time.Duration
|
|
clientIP net.IP
|
|
// nameservers
|
|
servers []string
|
|
dns []string // compatible with v2
|
|
}
|
|
|
|
func (h *dnsHandler) parseMetadata(md mdata.Metadata) (err error) {
|
|
const (
|
|
readTimeout = "readTimeout"
|
|
ttl = "ttl"
|
|
timeout = "timeout"
|
|
clientIP = "clientIP"
|
|
servers = "servers"
|
|
dns = "dns"
|
|
)
|
|
|
|
h.md.readTimeout = mdata.GetDuration(md, readTimeout)
|
|
h.md.ttl = mdata.GetDuration(md, ttl)
|
|
h.md.timeout = mdata.GetDuration(md, timeout)
|
|
if h.md.timeout <= 0 {
|
|
h.md.timeout = 5 * time.Second
|
|
}
|
|
sip := mdata.GetString(md, clientIP)
|
|
if sip != "" {
|
|
h.md.clientIP = net.ParseIP(sip)
|
|
}
|
|
h.md.servers = mdata.GetStrings(md, servers)
|
|
h.md.dns = strings.Split(mdata.GetString(md, dns), ",")
|
|
if len(h.md.dns) > 0 {
|
|
h.md.servers = append(h.md.servers, h.md.dns...)
|
|
}
|
|
|
|
return
|
|
}
|