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Returning instead of exiting when execv() fails causes mayhem, as
it results in two netd processes running, and netd commands being
processed by one of the two at random.

Bug: 18893886
Change-Id: I25afbabaef5955c9af7053b0333969b4e83549f1

Enables optimistic_dad and use_optimistic on all interfaces
by default.

---

This functionality was originally submitted in ag/569594.  Owing
to issues with bind()ing to optimistic addresses (see b/18609055)
this was reverted in ag/598690.

This reverts the revert.  :-)

Bug: 17769720
Change-Id: I156e5636341a846f41fb9a15c84cf06878b239d8

This is to undo ag/569594.

This reverts commit 828f8b88, reversing
changes made to ac7fefcf.

Bug: 18609055
Bug: 17769720
Change-Id: I120745d9d01d731174f477dff9b463dede8523d7

This is to undo ag/569594.

This reverts commit 828f8b88, reversing
changes made to ac7fefcf.

Bug: 18609055
Bug: 17769720
Change-Id: I120745d9d01d731174f477dff9b463dede8523d7

Bug: 18327075
Change-Id: I0df13ff4a17ee65e640be96695a3af31b020963a

These framework permission strings were being used as arbitrary labels
that mapped to netd permissions that have completely different meaning.
This leads to confusion, so use different strings.

Bug: 18194858
Change-Id: Ib3ec377ab26ce904d3d4678f04edec6cb1260517

We clear the file early so people know it's died and rewrite after all the
setup and flushing of data is done so people know when it's safe to
repopulate the data.

bug:18069270
Change-Id: I954cf43ff02f1d352015f128ef88b659e6d0f95a

Previously, we suppressed failures for the special case of
requestRouteToHost() being called multiple times. Turns out that other
parts of the system also try to add duplicate routes, so just suppress
EEXIST errors in general (as far as adding routes is concerned). For
example, this happens when the WiFi P2P DHCP client renews its lease
and blindly requests to add a route that it had already added before.

Bug: 17205769
Change-Id: I3de557ddb82c95899623aa31b4b3ec7c955f5609

This will be used to support 464xlat on wifi and IPv6 tethering.

Bug: 12111730
Change-Id: I3b97f4dfb787b2c5d5021811c6da51850bdc70d1

1. Change from a single PID to a map of interface names to PIDs.
2. Make clatd commands take an interface argument.
3. Give the clatd processes names that depend on their parent
   interface, e.g., clatd-rmnet0.

Bug: 12111730
Change-Id: Ia770952d6511f8598a3356be5911da4ffa01b46a

Enables optimistic_dad and use_optimistic on all interfaces
by default.

Bug: 17769720
Change-Id: Ide492e18aa94064b890fef30d31c3a14cfdf4052