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We had some places (NatController) where routes were being set
but not accounted for in the number-of-routes talley so we
could end up thinking the table was empty and not clean up
after ourselves properly.

Also consolidated constants.

bug:5917475
Change-Id: I98a41d433e1d4b4ca6692fb2328e2c9afc828145

See https://android-git.corp.google.com/g/#/c/157220

Bug: 5449033
Change-Id: I8ab66debe4d0c3857a4b80f6f7b6925a352cda87

While working around the logwrap() issue, it was replaced with system()
which could lead to various commands getting misinterpreted.

We now use a system() equivalent that doesn't use "sh -c".

Bug:5758556
Change-Id: I2599b526ac34bcfca18d05261286d902d547efda

While working around the logwrap() issue, it was replaced with system()
which could lead to various commands getting misinterpreted.

We now use a system() equivalent that doesn't use "sh -c".

Bug:5758556
Change-Id: I2599b526ac34bcfca18d05261286d902d547efda

The logwrapper uses a blocking read() which does not always
correctly detect when the child process at the other end is gone.
This is a quick workaround for http://b/5144246


A cleaner logwrapper parent() will follow.

Add support for BandwidthController() to use either system() or
logwrap(). It looks at "persist.bandwidth.uselogwrap" to be 0 or 1.

Change-Id: I2d17732214f1a7fef6838eee05d827695b707ab0
Signed-off-by: JP Abgrall <jpa@google.com>

Change-Id: I99f7b79bfb5b6305a0772f418a54ace50cac1bbe

Change-Id: I5247c9b5264db374442d19d903a250413057f19d
Signed-off-by: San Mehat <san@google.com>

Change-Id: Id86a0d0d0bdfa9bca36e7c7bce7e9290c8532082
Signed-off-by: San Mehat <san@google.com>

Change-Id: I9092a37b3d5f2bfa4f49ddc473d0a5490abaae8f
Signed-off-by: San Mehat <san@google.com>