87 lines
1.8 KiB
Go
87 lines
1.8 KiB
Go
// inspired from:
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// https://github.com/mactsouk/opensource.com.git
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// and
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// https://coderwall.com/p/wohavg/creating-a-simple-tcp-server-in-go
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package main
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// import "fmt"
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// import "os"
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import "math/rand"
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import "net"
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import "time"
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import "log"
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// will try to get this hosts FQDN
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import "github.com/Showmax/go-fqdn"
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// this is the king of dns libraries
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import "github.com/miekg/dns"
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// this is awesome for debugging
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import "github.com/davecgh/go-spew/spew"
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// this is our dnssec IPv6 socket library
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import "git.wit.com/jcarr/dnssecsocket"
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const (
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CONN_HOST = "localhost"
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CONN_PORT = "3333"
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CONN_TYPE = "tcp"
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)
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/*
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go func(c net.Conn) {
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defer c.Close()
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io.Copy(os.Stdout, c)
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}(conn)
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*/
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func main() {
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// redirect all this output to systemd
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dnssecsocket.UseJournalctl()
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hostname := fqdn.Get()
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log.Println("FQDN hostname is", hostname)
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// lookup the IP address from DNS
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dnsRR := dnssecsocket.Dnstrace(hostname, "AAAA")
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spew.Dump(dnsRR)
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ipaddr := dns.Field(dnsRR, 1)
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log.Println("ipaddr", ipaddr)
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listenstr := "[" + ipaddr + "]:" + CONN_PORT
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log.Println("listenstr", listenstr)
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myTCPAddr, err := net.ResolveTCPAddr("tcp", listenstr)
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// // Listen for incoming connections on the IPv6 address only
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l, err := net.ListenTCP("tcp", myTCPAddr)
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if err != nil {
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log.Println("Error listening:", err.Error())
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return
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}
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// Close the listener when the application closes.
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defer l.Close()
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log.Println("Listening on " + listenstr)
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rand.Seed(time.Now().Unix())
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for {
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// Listen for an incoming connection.
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conn, err := l.AcceptTCP()
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if err != nil {
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log.Println("Error accepting: ", err.Error())
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return
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}
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log.Println("Accepted new connection from: " + conn.RemoteAddr().String())
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// Handle connections in a new goroutine.
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go dnssecsocket.HandleConnection(conn)
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}
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}
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