Android 4.4 source code that implements network address translation

I am looking into the implementation of the hotspot feature. Can someone point me to the source code files that implement network address translation for wi-fi and bluetooth android hotspot implementations?

Thank you, experts!
cyber-33Asked:
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gheistCommented:
It has iptables. You just need root access to configure them.
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cyber-33Author Commented:
What iptables? do you have any documents that describe how to access and configure them?

Thank you!
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gheistCommented:
They are included in Linux kernel, configured by iptables utility if no better idea.
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cyber-33Author Commented:
I found a java file called iNetworkManagementService.java that appears to implement network address translation. Is it the right file?
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gheistCommented:
It configures NAT, it does not implement anything.
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