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[MOD][Xposed][4.3+] hosts Enabler (v1.0) - re-enables use of hosts file

OP DavisNT

30th August 2014, 10:21 PM   |  #1  
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This mod allows to use /system/etc/hosts file on configurations/ROMs (mostly symlinked hosts file on Android 4.4+) where it is ignored.
Hosts file usually gets ignored on some ROMs due to SELinux restrictions if it is a symlink to file on different partition.

Technically it works by attaching to all packages/apps and hooking DNS resolution API. On first name resolution API call hosts file is read and stored in memory (in HPPC OpenHashMap structure).

Additional features of hosts file:
  • use of IP address 127.0.0.0 allows to fail name resolution of associated hosts
  • use of DNS names instead of IP addresses (these DNS names are passed directly to DNS resolver - they are not looked up in hosts file recursively)

Known limitations:
  • JNI libraries are not affected (some applications may still ignore hosts file)
  • hosts file is read in memory of each application when it makes first DNS query (time and memory used depends on size of hosts file; time is logged in logcat with tag "hostsEnabler")

hosts Enabler uses HPPC: High Performance Primitive Collections for Java library which is distributed under Apache License 2.0.

This mod requires Xposed framework to be set up and hosts Enabler enabled as Xposed module.
Disclaimer: I am not responsible for anything that may happen as a result of using this mod.


Xposed Module Repository page:
http://repo.xposed.info/module/lv.id.dm.hostsenabler

For changelog see next post, for download links see downloads section.

XDA:DevDB Information
hosts Enabler, Xposed for all devices (see above for details)

Contributors
DavisNT
Xposed Package Name: lv.id.dm.hostsenabler

Version Information
Status: Stable
Current Stable Version: 1.0
Stable Release Date: 2014-08-30

Created 2014-08-30
Last Updated 2014-08-31
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30th August 2014, 10:21 PM   |  #2  
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Changelog:
v 1.0
* Initial release.
Last edited by DavisNT; 30th August 2014 at 10:44 PM.
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31st August 2014, 12:04 AM   |  #3  
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@DavisNT: Seems you missed UnbelovedHosts ...
31st August 2014, 12:12 AM   |  #4  
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Quote:
Originally Posted by defim

@DavisNT: Seems you missed UnbelovedHosts ...

Actually I was aware of that module, but I wanted to restore full functionality of hosts file (name resolution, use with third party updater tools etc.) with main focus on name resolution.
Last edited by DavisNT; 31st August 2014 at 12:14 AM.
31st August 2014, 12:23 AM   |  #5  
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Quote:
Originally Posted by DavisNT

Actually I was aware of that module, but I wanted to restore full functionality of hosts file (name resolution, use with third party updater tools etc.) with main focus on name resolution.

Both seem technically more or less the same: Reading an file with blocked hosts and answer name resolution requests with its contents. Btw with some devices (like Nexus 7) there is the issue that the /etc/hosts file is sometime reverted at reboot, what was the cause for me to use Xposed
31st August 2014, 12:38 AM   |  #6  
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Quote:
Originally Posted by defim

Both seem technically more or less the same: Reading an file with blocked hosts and answer name resolution requests with its contents. Btw with some devices (like Nexus 7) there is the issue that the /etc/hosts file is sometime reverted at reboot, what was the cause for me to use Xposed

I won't say they are the same:
  • UnbelovedHosts: full featured ad blocking solution
  • hosts Enabler: enables use of /system/etc/hosts file (for manually added name resolution entries (home PC etc.) or, if you wish, with any 3rd party updater software)
31st August 2014, 05:22 PM   |  #7  
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I will test it thanks

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