miracle091/dnscrypt-proxy
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dnscrypt-proxy
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Code Issues Releases Wiki Activity

plugin_block_name: make the blocking code reusable

This commit is contained in:
Frank Denis 2019-11-15 19:48:15 -05:00
parent 60aba17e44
commit f76e0fd8cf
1 changed files with 46 additions and 34 deletions
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80
dnscrypt-proxy/plugin_block_name.go
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@ -13,13 +13,17 @@ import (
lumberjack "gopkg.in/natefinch/lumberjack.v2"
)
type PluginBlockName struct {
type BlockedNames struct {
allWeeklyRanges *map[string]WeeklyRanges
patternMatcher *PatternMatcher
logger *lumberjack.Logger
format string
}
type PluginBlockName struct {
blockedNames *BlockedNames
}
func (plugin *PluginBlockName) Name() string {
return "block_name"
}
@ -34,8 +38,10 @@ func (plugin *PluginBlockName) Init(proxy *Proxy) error {
if err != nil {
return err
}
plugin.allWeeklyRanges = proxy.allWeeklyRanges
plugin.patternMatcher = NewPatternPatcher()
blockedNames := BlockedNames{
allWeeklyRanges: proxy.allWeeklyRanges,
patternMatcher: NewPatternPatcher(),
}
for lineNo, line := range strings.Split(string(bin), "\n") {
line = strings.TrimFunc(line, unicode.IsSpace)
if len(line) == 0 || strings.HasPrefix(line, "#") {
@ -52,14 +58,14 @@ func (plugin *PluginBlockName) Init(proxy *Proxy) error {
}
var weeklyRanges *WeeklyRanges
if len(timeRangeName) > 0 {
weeklyRangesX, ok := (*plugin.allWeeklyRanges)[timeRangeName]
weeklyRangesX, ok := (*blockedNames.allWeeklyRanges)[timeRangeName]
if !ok {
dlog.Errorf("Time range [%s] not found at line %d", timeRangeName, 1+lineNo)
} else {
weeklyRanges = &weeklyRangesX
}
}
if err := plugin.patternMatcher.Add(line, weeklyRanges, lineNo+1); err != nil {
if err := blockedNames.patternMatcher.Add(line, weeklyRanges, lineNo+1); err != nil {
dlog.Error(err)
continue
}
@ -67,8 +73,9 @@ func (plugin *PluginBlockName) Init(proxy *Proxy) error {
if len(proxy.blockNameLogFile) == 0 {
return nil
}
plugin.logger = &lumberjack.Logger{LocalTime: true, MaxSize: proxy.logMaxSize, MaxAge: proxy.logMaxAge, MaxBackups: proxy.logMaxBackups, Filename: proxy.blockNameLogFile, Compress: true}
plugin.format = proxy.blockNameFormat
blockedNames.logger = &lumberjack.Logger{LocalTime: true, MaxSize: proxy.logMaxSize, MaxAge: proxy.logMaxAge, MaxBackups: proxy.logMaxBackups, Filename: proxy.blockNameLogFile, Compress: true}
blockedNames.format = proxy.blockNameFormat
plugin.blockedNames = &blockedNames
return nil
}
@ -90,7 +97,11 @@ func (plugin *PluginBlockName) Eval(pluginsState *PluginsState, msg *dns.Msg) er
return nil
}
qName := strings.ToLower(StripTrailingDot(questions[0].Name))
reject, reason, xweeklyRanges := plugin.patternMatcher.Eval(qName)
return plugin.blockedNames.check(pluginsState, qName)
}
func (blockedNames *BlockedNames) check(pluginsState *PluginsState, qName string) error {
reject, reason, xweeklyRanges := blockedNames.patternMatcher.Eval(qName)
var weeklyRanges *WeeklyRanges
if xweeklyRanges != nil {
weeklyRanges = xweeklyRanges.(*WeeklyRanges)
@ -100,33 +111,34 @@ func (plugin *PluginBlockName) Eval(pluginsState *PluginsState, msg *dns.Msg) er
reject = false
}
}
if reject {
pluginsState.action = PluginsActionReject
pluginsState.returnCode = PluginsReturnCodeReject
if plugin.logger != nil {
var clientIPStr string
if pluginsState.clientProto == "udp" {
clientIPStr = (*pluginsState.clientAddr).(*net.UDPAddr).IP.String()
} else {
clientIPStr = (*pluginsState.clientAddr).(*net.TCPAddr).IP.String()
}
var line string
if plugin.format == "tsv" {
now := time.Now()
year, month, day := now.Date()
hour, minute, second := now.Clock()
tsStr := fmt.Sprintf("[%d-%02d-%02d %02d:%02d:%02d]", year, int(month), day, hour, minute, second)
line = fmt.Sprintf("%s\t%s\t%s\t%s\n", tsStr, clientIPStr, StringQuote(qName), StringQuote(reason))
} else if plugin.format == "ltsv" {
line = fmt.Sprintf("time:%d\thost:%s\tqname:%s\tmessage:%s\n", time.Now().Unix(), clientIPStr, StringQuote(qName), StringQuote(reason))
} else {
dlog.Fatalf("Unexpected log format: [%s]", plugin.format)
}
if plugin.logger == nil {
return errors.New("Log file not initialized")
}
plugin.logger.Write([]byte(line))
if !reject {
return nil
}
pluginsState.action = PluginsActionReject
pluginsState.returnCode = PluginsReturnCodeReject
if blockedNames.logger != nil {
var clientIPStr string
if pluginsState.clientProto == "udp" {
clientIPStr = (*pluginsState.clientAddr).(*net.UDPAddr).IP.String()
} else {
clientIPStr = (*pluginsState.clientAddr).(*net.TCPAddr).IP.String()
}
var line string
if blockedNames.format == "tsv" {
now := time.Now()
year, month, day := now.Date()
hour, minute, second := now.Clock()
tsStr := fmt.Sprintf("[%d-%02d-%02d %02d:%02d:%02d]", year, int(month), day, hour, minute, second)
line = fmt.Sprintf("%s\t%s\t%s\t%s\n", tsStr, clientIPStr, StringQuote(qName), StringQuote(reason))
} else if blockedNames.format == "ltsv" {
line = fmt.Sprintf("time:%d\thost:%s\tqname:%s\tmessage:%s\n", time.Now().Unix(), clientIPStr, StringQuote(qName), StringQuote(reason))
} else {
dlog.Fatalf("Unexpected log format: [%s]", blockedNames.format)
}
if blockedNames.logger == nil {
return errors.New("Log file not initialized")
}
blockedNames.logger.Write([]byte(line))
}
return nil
}