From ffd7369ab9b56e63f370e22622d0d23e9257fba4 Mon Sep 17 00:00:00 2001
From: MrLetsplay <mr@cringe-studios.com>
Date: Sat, 11 Jan 2025 15:17:24 +0100
Subject: [PATCH] Initial commit

---
 go.mod  | 12 ++++++++
 go.sum  | 12 ++++++++
 main.go | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 117 insertions(+)
 create mode 100644 go.mod
 create mode 100644 go.sum
 create mode 100644 main.go

diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..5d62200
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,12 @@
+module git.cringe-studios.com/mr/dnshttp
+
+go 1.23.2
+
+require (
+	github.com/miekg/dns v1.1.62 // indirect
+	golang.org/x/mod v0.18.0 // indirect
+	golang.org/x/net v0.27.0 // indirect
+	golang.org/x/sync v0.7.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
+	golang.org/x/tools v0.22.0 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..95e8194
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,12 @@
+github.com/miekg/dns v1.1.62 h1:cN8OuEF1/x5Rq6Np+h1epln8OiyPWV+lROx9LxcGgIQ=
+github.com/miekg/dns v1.1.62/go.mod h1:mvDlcItzm+br7MToIKqkglaGhlFMHJ9DTNNWONWXbNQ=
+golang.org/x/mod v0.18.0 h1:5+9lSbEzPSdWkH32vYPBwEpX8KwDbM52Ud9xBUvNlb0=
+golang.org/x/mod v0.18.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/net v0.27.0 h1:5K3Njcw06/l2y9vpGCSdcxWOYHOUk3dVNGDXN+FvAys=
+golang.org/x/net v0.27.0/go.mod h1:dDi0PyhWNoiUOrAS8uXv/vnScO4wnHQO4mj9fn/RytE=
+golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
+golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/tools v0.22.0 h1:gqSGLZqv+AI9lIQzniJ0nZDRG5GBPsSi+DRNHWNz6yA=
+golang.org/x/tools v0.22.0/go.mod h1:aCwcsjqvq7Yqt6TNyX7QMU2enbQ/Gt0bo6krSeEri+c=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..a9f0bb8
--- /dev/null
+++ b/main.go
@@ -0,0 +1,93 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"math/rand"
+	"net/http"
+	"strconv"
+
+	"github.com/miekg/dns"
+)
+
+type dnsHandler struct{}
+
+func (h *dnsHandler) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
+	msg := new(dns.Msg)
+	msg.SetReply(r)
+	msg.Authoritative = true
+
+	for _, question := range r.Question {
+		fmt.Printf("Received query: %s (%d)\n", question.Name, question.Qtype)
+
+		if question.Qtype == dns.TypeCNAME || question.Qtype == dns.TypeA {
+			if question.Name == "random-number.dynamic.cringe-studios.com." {
+				theNumber := rand.Intn(10000)
+
+				msg.Answer = append(msg.Answer, &dns.CNAME{
+					Hdr: dns.RR_Header{
+						Name:   question.Name,
+						Rrtype: dns.TypeCNAME,
+						Class:  dns.ClassINET,
+						Ttl:    30,
+					},
+					Target: "number-" + strconv.Itoa(theNumber) + ".dynamic.cringe-studios.com.",
+				})
+
+				continue
+			}
+
+			if question.Name == "amogus.dynamic.cringe-studios.com." {
+				msg.Answer = append(msg.Answer, &dns.CNAME{
+					Hdr: dns.RR_Header{
+						Name:   question.Name,
+						Rrtype: dns.TypeCNAME,
+						Class:  dns.ClassINET,
+						Ttl:    30,
+					},
+					Target: "test(test.dynamic.cringe-studios.com.",
+				})
+
+				continue
+			}
+
+			msg.Answer = append(msg.Answer, &dns.CNAME{
+				Hdr: dns.RR_Header{
+					Name:   question.Name,
+					Rrtype: dns.TypeCNAME,
+					Class:  dns.ClassINET,
+					Ttl:    30,
+				},
+				Target: "homeipv4.graphite-official.com.",
+			})
+		}
+	}
+
+	w.WriteMsg(msg)
+}
+
+func getPage(w http.ResponseWriter, r *http.Request) {
+	w.Write([]byte("Hello World!"))
+}
+
+func main() {
+	handler := new(dnsHandler)
+
+	server := &dns.Server{
+		Addr:      ":6953",
+		Net:       "udp",
+		Handler:   handler,
+		UDPSize:   65535,
+		ReusePort: true,
+	}
+
+	go func() {
+		err := server.ListenAndServe()
+		if err != nil {
+			log.Fatalln("failed to listen", err)
+		}
+	}()
+
+	http.HandleFunc("/", getPage)
+	http.ListenAndServe(":6980", nil)
+}