New feature: sleep mode

Author: jedisct1

dnscrypt-proxy/config.go

@@ -49,6 +49,7 @@ type Config struct {
 	BlockIPv6                bool           `toml:"block_ipv6"`
 	BlockUnqualified         bool           `toml:"block_unqualified"`
 	BlockUndelegated         bool           `toml:"block_undelegated"`
+	SleepMode                bool           `toml:"sleep_mode"`
 	Cache                    bool
 	CacheSize                int                         `toml:"cache_size"`
 	CacheNegTTL              uint32                      `toml:"cache_neg_ttl"`
@@ -474,6 +475,8 @@ func ConfigLoad(proxy *Proxy, flags *ConfigFlags) error {
 	proxy.pluginBlockIPv6 = config.BlockIPv6
 	proxy.pluginBlockUnqualified = config.BlockUnqualified
 	proxy.pluginBlockUndelegated = config.BlockUndelegated
+	proxy.sleepMode = config.SleepMode
+
 	proxy.cache = config.Cache
 	proxy.cacheSize = config.CacheSize
 

dnscrypt-proxy/example-dnscrypt-proxy.toml

@@ -55,6 +55,11 @@ max_clients = 250
 # user_name = 'nobody'
 
 
+## Sleep mode: add an incremental delay to queries so that you eventually get some sleep instead of watching videos all night long.
+
+sleep_mode = false
+
+
 ## Require servers (from remote sources) to satisfy specific properties
 
 # Use servers reachable over IPv4

dnscrypt-proxy/proxy.go

@@ -71,6 +71,7 @@ type Proxy struct {
 	certRefreshDelayAfterFailure  time.Duration
 	timeout                       time.Duration
 	certRefreshDelay              time.Duration
+	sleepDelay                    time.Duration
 	cacheSize                     int
 	logMaxBackups                 int
 	logMaxAge                     int
@@ -94,6 +95,7 @@ type Proxy struct {
 	anonDirectCertFallback        bool
 	pluginBlockUndelegated        bool
 	child                         bool
+	sleepMode                     bool
 	requiredProps                 stamps.ServerInformalProperties
 	ServerNames                   []string
 	DisabledServerNames           []string
@@ -617,6 +619,12 @@ func (proxy *Proxy) processIncomingQuery(
 	if len(query) < MinDNSPacketSize {
 		return response
 	}
+
+	if proxy.sleepMode {
+		time.Sleep(proxy.sleepDelay)
+		proxy.sleepDelay += 10 * time.Microsecond
+	}
+
 	pluginsState := NewPluginsState(proxy, clientProto, clientAddr, serverProto, start)
 	serverName := "-"
 	needsEDNS0Padding := false