- BUG FIX: IP Groups: blank timetable was not allowed; timetable & cfg con now be blank or undefined

- FIX: enable response compression by default to be compatible with bogus DNS clients not understanding responses split to multiple UDP packets (FIX failure of Amazon PrimeVideo on LG WebOS)
- new conf-specific setting "cache": allows disabling cache on configuration basis (default: cache is enabled)
- updated documentation
- added more debug logs
master
bloved 2 years ago committed by Gitea
parent 4007fd9eea
commit e5b8fbe53c
  1. 32
      01.conf.go
  2. 19
      README.md
  3. 14
      dns_client.go
  4. 4
      dns_handler.go
  5. 1
      main.go

@ -113,6 +113,11 @@ func init() {
conf.ZabovAddBL = net.ParseIP(confRaw["blackholeip"].(string))
conf.ZabovHostsFile = confRaw["hostsfile"].(string)
if confRaw["cache"] != nil {
conf.ZabovCache = confRaw["cache"].(bool)
} else {
conf.ZabovCache = true
}
conf.ZabovDNSArray = fileByLines(conf.ZabovUpDNS)
ZabovConfigs[name] = &conf
@ -219,8 +224,16 @@ func init() {
}
groupStruct.ips = append(groupStruct.ips, ip)
}
groupStruct.cfg = groupMap["cfg"].(string)
groupStruct.timetable = groupMap["timetable"].(string)
if groupMap["cfg"] != nil {
groupStruct.cfg = groupMap["cfg"].(string)
}
if groupMap["timetable"] != nil {
groupStruct.timetable = groupMap["timetable"].(string)
}
if len(groupStruct.cfg) == 0 && len(groupStruct.timetable) == 0 {
log.Println("ip group error: specify cfg or timetable")
os.Exit(1)
}
if len(groupStruct.cfg) > 0 {
refConfig, ok := ZabovConfigs[groupStruct.cfg]
if !ok {
@ -229,14 +242,17 @@ func init() {
} else {
refConfig.references++
}
fmt.Println("cfg:", groupStruct.cfg)
}
fmt.Println("cfg:", groupStruct.cfg)
fmt.Println("timetable:", groupStruct.timetable)
_, ok := ZabovTimetables[groupStruct.timetable]
if !ok {
log.Println("inexistent timetable:", groupStruct.timetable)
os.Exit(1)
if len(groupStruct.timetable) > 0 {
fmt.Println("timetable:", groupStruct.timetable)
_, ok := ZabovTimetables[groupStruct.timetable]
if !ok {
log.Println("inexistent timetable:", groupStruct.timetable)
os.Exit(1)
}
}
ZabovIPGroups = append(ZabovIPGroups, groupStruct)
}
}

@ -62,7 +62,8 @@ Minimal config file should look like:
"singlefilters":"./urls-domains.txt",
"doublefilters":"./urls-hosts.txt",
"blackholeip":"127.0.0.1",
"hostsfile":"./urls-local.txt"
"hostsfile":"./urls-local.txt",
"cache":true
},
}
}
@ -84,7 +85,7 @@ configs:
- doublefilters: name of the file, for blacklists following the "doublefilter" schema.(one URL per line)
- blackholeip: IP address to return when the IP is banned. This is because you may want to avoid MX issues, mail loops on localhost, or you have a web server running on localhost
- hostsfile: path where you keep your local blacklistfile : this is in the format "singlefilter", meaning one domain per line, unlike hosts file.
- cache: if set to false disable the cache for this configuration. Boolean, defaults true
Advanced configuration includes support for multiple configurations based on IP Source and timetables:
<pre>
@ -104,6 +105,7 @@ Advanced configuration includes support for multiple configurations based on IP
},
"ipaliases":{
"pc8":"192.168.178.29",
"lg-tv":"192.168.178.10",
"localhost":"127.0.0.1"
},
"ipgroups":[
@ -111,6 +113,11 @@ Advanced configuration includes support for multiple configurations based on IP
"ips":["localhost", "::1", "192.168.178.30", "192.168.178.31", "pc8"],
"cfg":"",
"timetable":"tt_children"
},
{
"ips":["lg-tv"],
"cfg":"tv",
"timetable":""
}
],
"timetables":{
@ -146,6 +153,14 @@ Advanced configuration includes support for multiple configurations based on IP
"doublefilters":"./urls-hosts-restricted.txt",
"blackholeip":"127.0.0.1",
"hostsfile":"./urls-local.txt"
},
"tv":{
"upstream":"./dns-upstream.txt",
"singlefilters":"",
"doublefilters":"",
"blackholeip":"127.0.0.1",
"hostsfile":"",
"cache":false
}
}
}

@ -2,6 +2,7 @@ package main
import (
"fmt"
"log"
"time"
"math/rand"
@ -14,7 +15,9 @@ import (
//first server to answer wins
//accepts config name to select the UP DNS source list
func ForwardQuery(query *dns.Msg, config string, nocache bool) *dns.Msg {
if ZabovDebug {
log.Println("ForwardQuery: nocache", nocache)
}
go incrementStats("ForwardQueries", 1)
r := new(dns.Msg)
@ -29,6 +32,10 @@ func ForwardQuery(query *dns.Msg, config string, nocache bool) *dns.Msg {
go incrementStats("CacheHit", 1)
cached.SetReply(query)
cached.Authoritative = true
if ZabovDebug {
log.Println("ForwardQuery: CacheHit")
}
cached.Compress = true
return cached
}
@ -60,7 +67,12 @@ func ForwardQuery(query *dns.Msg, config string, nocache bool) *dns.Msg {
go incrementStats(d, 1)
in.SetReply(query)
in.Authoritative = true
in.Compress = true
go DomainCache(lfqdn, in)
if ZabovDebug {
log.Println("ForwardQuery: OK!")
}
return in
}

@ -287,7 +287,7 @@ func (mydns *handler) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
go logQuery(remIP, fqdn, QType, config, timetable, "killed")
} else {
go logQuery(remIP, fqdn, QType, config, timetable, "forwarded")
ret := ForwardQuery(r, config, false)
ret := ForwardQuery(r, config, !ZabovConfig.ZabovCache)
w.WriteMsg(ret)
}
case dns.TypePTR:
@ -303,7 +303,7 @@ func (mydns *handler) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
w.WriteMsg(ret)
go logQuery(remIP, msg.Question[0].Name, QType, config, timetable, "localresponder")
default:
ret := ForwardQuery(r, config, false)
ret := ForwardQuery(r, config, !ZabovConfig.ZabovCache)
w.WriteMsg(ret)
if len(ZabovDebugDBPath) > 0 {
go logQuery(remIP, msg.Question[0].Name, QType, config, timetable, "forwarded")

@ -41,6 +41,7 @@ type ZabovConfig struct {
ZabovHostsFile string // json:hostsfile -> ZabovHostsFile is the file we use to keep our hosts
ZabovUpDNS string // json:upstream -> ZabovUpDNS keeps the name of upstream DNSs
ZabovDNSArray []string // contains all the DNS we mention, parsed from ZabovUpDNS file
ZabovCache bool // allows to disable cache
references int // contains references to this config; if zero, config shall be removed
}

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