Sam Therapy
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continuous-integration/drone/push Build is passing
Instead of copying the opts struct every time it gets passed around, it should be created once and passed through reference. This should reduce memory utilization, unfortunately I cannot test it since this program runs so fast pprof won't report anything useful. I think I found all of them 🙂 Co-authored-by: Sam Therapy <sam@samtherapy.net> Reviewed-on: #132 Reviewed-by: grumbulon <grumbulon@grumbulon.xyz>
63 lines
1.2 KiB
Go
63 lines
1.2 KiB
Go
// SPDX-License-Identifier: BSD-3-Clause
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package resolvers
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import (
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"fmt"
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"time"
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"git.froth.zone/sam/awl/pkg/util"
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"github.com/ameshkov/dnscrypt/v2"
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"github.com/miekg/dns"
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)
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// DNSCryptResolver is for making DNSCrypt queries.
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type DNSCryptResolver struct {
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opts *util.Options
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}
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var _ Resolver = (*DNSCryptResolver)(nil)
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// LookUp performs a DNS query.
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func (resolver *DNSCryptResolver) LookUp(msg *dns.Msg) (util.Response, error) {
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client := dnscrypt.Client{
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Timeout: resolver.opts.Request.Timeout,
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UDPSize: 1232,
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}
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if resolver.opts.TCP || resolver.opts.TLS {
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client.Net = tcp
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} else {
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client.Net = udp
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}
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switch {
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case resolver.opts.IPv4:
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client.Net += "4"
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case resolver.opts.IPv6:
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client.Net += "6"
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}
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resolver.opts.Logger.Debug("Using", client.Net, "for making the request")
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resolverInf, err := client.Dial(resolver.opts.Request.Server)
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if err != nil {
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return util.Response{}, fmt.Errorf("dnscrypt: dial: %w", err)
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}
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now := time.Now()
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res, err := client.Exchange(msg, resolverInf)
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rtt := time.Since(now)
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if err != nil {
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return util.Response{}, fmt.Errorf("dnscrypt: exchange: %w", err)
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}
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resolver.opts.Logger.Info("Request successful")
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return util.Response{
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DNS: res,
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RTT: rtt,
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}, nil
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}
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