134 lines
2.9 KiB
Go
134 lines
2.9 KiB
Go
// Various Linux/Unix'y things
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// https://wiki.archlinux.org/title/Dynamic_DNS
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package main
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import (
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"net"
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"strings"
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"go.wit.com/log"
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"go.wit.com/shell"
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)
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/*
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Check a bunch of things. If they don't work right, then things are not correctly configured
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They are things like:
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/etc/hosts
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hostname
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hostname -f
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domainname
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*/
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func (h *Host) verifyETC() bool {
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return true
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}
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func (h *Host) updateIPs(host string) {
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ips, err := net.LookupIP(host)
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if err != nil {
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log.Error(err, "updateIPs failed")
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}
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for _, ip := range ips {
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log.Println(host, ip)
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}
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}
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func (h *Host) setIPv4(ipv4s map[string]*IPtype) {
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for ip, t := range ipv4s {
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log.Println("IPv4", ip, t)
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}
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}
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func (h *Host) checkDNS() {
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var ip4 bool = false
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var ip6 bool = false
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for s, t := range h.ipmap {
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i := t.iface
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ipt := "IPv4"
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if (t.ipv6) {
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ipt = "IPv6"
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}
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if (! t.IsReal()) {
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log.Println(args.VerboseDNS, "\tIP is not Real", ipt, i.Index, i.Name, s)
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continue
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}
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log.Println(args.VerboseDNS, "\tIP is Real ", ipt, i.Index, i.Name, s)
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if (t.ipv6) {
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ip6 = true
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} else {
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ip4 = true
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}
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}
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if (ip4 == true) {
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log.Println(args.VerboseDNS, "IPv4 should work. Wow. You actually have a real IPv4 address")
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} else {
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log.Println(args.VerboseDNS, "IPv4 is broken. (be nice and setup ipv4-only.wit.com)")
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}
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if (ip6 == true) {
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log.Println(args.VerboseDNS, "IPv6 should be working. Need to test it here.")
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} else {
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log.Println(args.VerboseDNS, "IPv6 is broken. Need to fix it here.")
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}
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}
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// nsLookup performs an NS lookup on the given domain name.
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func lookupNS(domain string) {
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var domains string
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nsRecords, err := net.LookupNS(domain)
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if err != nil {
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return
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}
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var servers []string
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for _, ns := range nsRecords {
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servers = append(servers, ns.Host)
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}
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// checks to see if the NS records change
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for _, server := range servers {
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server = strings.TrimRight(server, ".")
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if (me.nsmap[server] != domain) {
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log.Log(CHANGE, "lookupNS() domain", domain, "has NS", server)
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me.nsmap[server] = domain
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domains += server + "\n"
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}
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}
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var tmp string
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// checks to see if the NS records change
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for s, d := range me.nsmap {
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log.Log(CHANGE, "lookupNS() domain =", d, "server =", s)
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if (domain == d) {
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tmp += s + "\n"
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// figure out the provider (google, cloudflare, etc)
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setProvider(s)
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}
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}
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tmp = shell.Chomp(tmp)
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if (tmp != me.NSrr.S) {
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me.changed = true
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log.Log(CHANGE, "lookupNS() setting me.NSrr =", tmp)
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me.NSrr.SetText(tmp)
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}
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}
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// getDomain returns the second-to-last part of a domain name.
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func setProvider(hostname string) {
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var provider string = ""
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parts := strings.Split(hostname, ".")
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if len(parts) >= 2 {
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provider = parts[len(parts)-2]
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}
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if (me.DnsAPI.S != provider) {
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me.changed = true
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log.Log(CHANGE, "setProvider() changed to =", provider)
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me.DnsAPI.SetText(provider)
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}
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}
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