75 lines
1.4 KiB
Go
75 lines
1.4 KiB
Go
package main
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import (
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"fmt"
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"github.com/baez90/inetmock/internal/config"
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"github.com/miekg/dns"
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"go.uber.org/zap"
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"sync"
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)
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type dnsHandler struct {
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logger *zap.Logger
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dnsServer []*dns.Server
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}
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func (d *dnsHandler) Run(config config.HandlerConfig) {
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options := loadFromConfig(config.Options())
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addr := fmt.Sprintf("%s:%d", config.ListenAddress(), config.Port())
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handler := ®exHandler{
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fallback: options.Fallback,
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logger: d.logger,
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}
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for _, rule := range options.Rules {
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d.logger.Info(
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"register DNS rule",
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zap.String("pattern", rule.pattern.String()),
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zap.String("response", rule.response.String()),
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)
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handler.AddRule(rule)
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}
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d.logger = d.logger.With(
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zap.String("address", addr),
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)
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d.dnsServer = []*dns.Server{
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{
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Addr: addr,
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Net: "udp",
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Handler: handler,
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},
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{
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Addr: addr,
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Net: "tcp",
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Handler: handler,
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},
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}
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for _, dnsServer := range d.dnsServer {
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go d.startServer(dnsServer)
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}
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}
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func (d *dnsHandler) startServer(dnsServer *dns.Server) {
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if err := dnsServer.ListenAndServe(); err != nil {
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d.logger.Error(
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"failed to start DNS server listener",
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zap.Error(err),
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)
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}
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}
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func (d *dnsHandler) Shutdown(wg *sync.WaitGroup) {
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for _, dnsServer := range d.dnsServer {
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if err := dnsServer.Shutdown(); err != nil {
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d.logger.Error(
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"failed to shutdown server",
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zap.Error(err),
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)
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}
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}
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wg.Done()
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}
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