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authorArne Schwabe <arne@rfc2549.org>2014-02-17 19:50:36 +0100
committerArne Schwabe <arne@rfc2549.org>2014-02-17 19:50:36 +0100
commitb79286ec96f5853ba53a73b62b985b12d87d8af0 (patch)
tree20c1d22a53ae0624cc19ccd7df91b8e3e2418529 /main/src
parent0c3f0cae9bcfc862052e9ccc137a63f9587002a2 (diff)
BigInteger arithmetic is slow as hell. Cache getFirst/Last address
Diffstat (limited to 'main/src')
-rw-r--r--main/src/main/java/de/blinkt/openvpn/core/NetworkSpace.java10
-rwxr-xr-xmain/src/main/res/values/strings.xml2
2 files changed, 9 insertions, 3 deletions
diff --git a/main/src/main/java/de/blinkt/openvpn/core/NetworkSpace.java b/main/src/main/java/de/blinkt/openvpn/core/NetworkSpace.java
index c7d09065..54470962 100644
--- a/main/src/main/java/de/blinkt/openvpn/core/NetworkSpace.java
+++ b/main/src/main/java/de/blinkt/openvpn/core/NetworkSpace.java
@@ -15,6 +15,8 @@ public class NetworkSpace {
public int networkMask;
private boolean included;
private boolean isV4;
+ private BigInteger firstaddr;
+ private BigInteger lastaddr;
@Override
@@ -55,12 +57,16 @@ public class NetworkSpace {
}
public BigInteger getLastAddress() {
- return getMaskedAddress(true);
+ if(lastaddr==null)
+ lastaddr= getMaskedAddress(true);
+ return lastaddr;
}
public BigInteger getFirstAddress() {
- return getMaskedAddress(false);
+ if (firstaddr==null)
+ firstaddr=getMaskedAddress(false);
+ return firstaddr;
}
diff --git a/main/src/main/res/values/strings.xml b/main/src/main/res/values/strings.xml
index 8c643f6d..3b9b9c0f 100755
--- a/main/src/main/res/values/strings.xml
+++ b/main/src/main/res/values/strings.xml
@@ -220,7 +220,7 @@
<string name="openvpn_log">OpenVPN Log</string>
<string name="import_config">Import OpenVPN configuration</string>
<string name="battery_consumption_title">Battery consumption</string>
- <string name="baterry_consumption">In my personal tests the main reason for high battery consumption of OpenVPN are the keepalive packets. Most OpenVPN servers have a configuration directive like \'keepalive 10 60\' which causes the client and server to exchange keepalive packets every ten seconds. &lt;p&gt; While these packets are small and do not use much traffic, they keep the mobile radio network busy and increase the energy consumption. (See also &lt;a href="http://developer.android.com/training/efficient-downloads/efficient-network-access.html#RadioStateMachine"&gt;The Radio State Machine | Android Developers&lt;/a&gt;) &lt;p&gt; This keepalive setting cannot be changed on the client. Only the system administrator of the OpenVPN can change the setting. &lt;p&gt; Unfortunately using a keepalive larger than 60 seconds with UDP can cause some NAT gateways to drop the connection due to an inactivity timeout. Using TCP with a long keepalive timeout works, but tunneling TCP over TCP performs extremely poorly on connections with high packet loss. (See &lt;a href="http://sites.inka.de/bigred/devel/tcp-tcp.html"&gt;Why TCP Over TCP Is A Bad Idea&lt;/a&gt;)</string>
+ <string name="baterry_consumption">In my personal tests the main reason for high battery consumption of OpenVPN are the keepalive packets. Most OpenVPN servers have a configuration directive like \'keepalive 10 60\' which causes the client and server to exchange keepalive packets every ten seconds. &lt;p&gt; While these packets are small and do not use much traffic, they keep the mobile radio network busy and increase the energy consumption. (See also &lt;a href="http://developer.android.com/training/efficient-downloads/efficient-network-access.html#RadioStateMachine"&gt;The Radio State Machine | Android Developers&lt;/a&gt;) &lt;p&gt; This keepalive setting cannot be changed on the client. Only the system administrator of the OpenVPN can change the setting. &lt;p&gt; Unfortunately using a keepalive larger than 60 seconds with UDP can cause some NAT gateways to drop the connection due to an inactivity timeout. Using TCP with a long keep alive timeout works, but tunneling TCP over TCP performs extremely poorly on connections with high packet loss. (See &lt;a href="http://sites.inka.de/bigred/devel/tcp-tcp.html"&gt;Why TCP Over TCP Is A Bad Idea&lt;/a&gt;)</string>
<string name="faq_tethering">The Android Tethering feature (over WiFi, USB or Bluetooth) and the VPNService API (used by this program) do not work together. For more details see the &lt;a href=\"http://code.google.com/p/ics-openvpn/issues/detail?id=34\">issue #34&lt;/a></string>
<string name="vpn_tethering_title">VPN and Tethering</string>
<string name="connection_retries">Connection retries</string>