diff options
Diffstat (limited to 'dns.go')
| -rw-r--r-- | dns.go | 62 |
1 files changed, 61 insertions, 1 deletions
@@ -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) + } +} |