make a cloudflare packagev0.1.2

    move cloudflare stuff to a package
    display cloudflare API values
    dns protobuf example
    sort output, but gocli formatting is bad
    cloudflare window can be closed
    first time success pushing AAAA records for my box
    enable a cloudflare button
    RFC 8482. DNS servers we use should respond to ANY
    	We should support ANY requests via DNS
    	as long as we enforce TCP over UDP
    populate the API provider
    domain NS record changes are tracked
    check hostname OS configuration
    detect domain name changes
    lookup of NS records for my domain name
    button to investigate port 53 daemon
    start dns resolver detection and debugging
    measure dns resolution speed
    sort todo items

Signed-off-by: Jeff Carr <[email protected]>

1 files changed, 61 insertions, 1 deletions

diff --git a/dns.go b/dns.go
index 2bb4232..8afbf26 100644
--- a/dns.go
+++ b/dns.go
@@ -7,6 +7,9 @@ package main
 import 	(
 	"log"
 	"net"
+	"strings"
+
+	"git.wit.org/wit/shell"
 )
 
 /*
@@ -24,7 +27,7 @@ func (h *Host) verifyETC() bool {
 func (h *Host) updateIPs(host string) {
     ips, err := net.LookupIP(host)
         if err != nil {
-                log.Println(logError, "updateIPs failed", err)
+                debug(LogError, "updateIPs failed", err)
         }
         for _, ip := range ips {
                 log.Println(host, ip)
@@ -71,3 +74,60 @@ func (h *Host) checkDNS() {
 		log.Println(args.VerboseDNS, "IPv6 is broken. Need to fix it here.")
 	}
 }
+
+// nsLookup performs an NS lookup on the given domain name.
+func lookupNS(domain string) {
+	var domains string
+
+	nsRecords, err := net.LookupNS(domain)
+	if err != nil {
+		return
+	}
+
+	var servers []string
+	for _, ns := range nsRecords {
+		servers = append(servers, ns.Host)
+	}
+
+	// checks to see if the NS records change
+	for _, server := range servers {
+		server = strings.TrimRight(server, ".")
+		if (me.nsmap[server] != domain) {
+			debug(LogChange, "lookupNS() domain", domain, "has NS", server)
+			me.nsmap[server] = domain
+			domains += server + "\n"
+		}
+	}
+
+	var tmp string
+	// checks to see if the NS records change
+	for s, d := range me.nsmap {
+		debug(LogChange, "lookupNS() domain =", d, "server =", s)
+		if (domain == d) {
+			tmp += s + "\n"
+			// figure out the provider (google, cloudflare, etc)
+			setProvider(s)
+		}
+	}
+	tmp = shell.Chomp(tmp)
+
+	if (tmp != me.NSrr.S) {
+		me.changed = true
+		debug(LogChange, "lookupNS() setting me.NSrr =", tmp)
+		me.NSrr.SetText(tmp)
+	}
+}
+
+// getDomain returns the second-to-last part of a domain name.
+func setProvider(hostname string) {
+	var provider string = ""
+	parts := strings.Split(hostname, ".")
+	if len(parts) >= 2 {
+		provider = parts[len(parts)-2]
+	}
+	if (me.DnsAPI.S != provider) {
+		me.changed = true
+		debug(LogChange, "setProvider() changed to =", provider)
+		me.DnsAPI.SetText(provider)
+	}
+}