platform_external_android-clat/checksum.h, branch oreo-dev Unnamed repository; edit this file 'description' to name the repository. Generate a random IID if one is not specified. 2014-10-28T06:30:45+00:00 Lorenzo Colitti lorenzo@google.com 2014-10-09T13:29:45+00:00 9808952bdf2fa6ce4cbd790d1967691bb95bf327 - Add code to generate a random IPv6 address that's checksum-neutral with the NAT64 prefix and clat IPv4 address. - Only calculate the IP address after the NAT64 prefix is known. - Because the clat IPv6 address is no longer determinisitic, modify interface_poll so it checks whether the prefix has changed instead of checking whether the IPv6 address has changed. - Add/update unit tests. Change-Id: Ia53716ca5315ebdd0eaa3ad3a07552bf18e9dd5c 
- Add code to generate a random IPv6 address that's
  checksum-neutral with the NAT64 prefix and clat IPv4 address.
- Only calculate the IP address after the NAT64 prefix is known.
- Because the clat IPv6 address is no longer determinisitic,
  modify interface_poll so it checks whether the prefix has
  changed instead of checking whether the IPv6 address has
  changed.
- Add/update unit tests.

Change-Id: Ia53716ca5315ebdd0eaa3ad3a07552bf18e9dd5c
Modify the pseudo-header checksum functions. 2014-02-22T03:46:06+00:00 Lorenzo Colitti lorenzo@google.com 2014-02-20T05:28:43+00:00 07f0265830fcae2632159e9993b93a161d7ea23b - Remove the initial checksum, which we don't use anywhere. - Add the upper-layer protocol to the IPv6 function. Currently this is always the same as the next header field in the IPv6 header, but technically it's the upper-layer header after all the extension headers. This is required to support fragments. Bug: 11542311 Change-Id: Ie1a20fa74ee5bc933c1014bab74ae2957979b2b8 
- Remove the initial checksum, which we don't use anywhere.
- Add the upper-layer protocol to the IPv6 function. Currently
  this is always the same as the next header field in the IPv6
  header, but technically it's the upper-layer header after all
  the extension headers. This is required to support fragments.

Bug: 11542311
Change-Id: Ie1a20fa74ee5bc933c1014bab74ae2957979b2b8
Fix up checksums instead of recalculating them. 2014-02-14T04:33:04+00:00 Lorenzo Colitti lorenzo@google.com 2014-02-10T00:20:05+00:00 5a50c0283346a197cda7af19e68f611f14b8fe57 Currently the checksums of translated packets are calculated from scratch by checksumming the translated packet. This is slow and does not work in the case of fragments, because the whole packet is not available. Instead, calculate the checksum by adjusting the checksum of the original packet. Bug: 11542311 Bug: 12116252 Change-Id: I6b78a94ca5bd96b13ee2653b6200551193b3dcc1 
Currently the checksums of translated packets are calculated
from scratch by checksumming the translated packet. This is slow
and does not work in the case of fragments, because the whole
packet is not available. Instead, calculate the checksum by
adjusting the checksum of the original packet.

Bug: 11542311
Bug: 12116252
Change-Id: I6b78a94ca5bd96b13ee2653b6200551193b3dcc1
Pass in the length to pseudo checksum functions 2013-04-09T08:14:40+00:00 Lorenzo Colitti lorenzo@google.com 2013-04-08T09:02:24+00:00 0278627f576832860af2d84e04e383ecaa92d74f Currently, the pseudo-header checksum calculation functions get the transport layer length from the IP header. This requires that the length be known at IP header construction time, which does not allow transport layer translation functions to change the length of the packet later. Have the transport functions pass in the size directly. Bug: 8276725 Change-Id: I76a93f5e66181bec21d68f779c68c54090a77c33 
Currently, the pseudo-header checksum calculation functions get
the transport layer length from the IP header. This requires that
the length be known at IP header construction time, which
does not allow transport layer translation functions to change
the length of the packet later. Have the transport functions
pass in the size directly.

Bug: 8276725
Change-Id: I76a93f5e66181bec21d68f779c68c54090a77c33
android clat service 2012-11-12T23:59:12+00:00 Daniel Drown dan-android@drown.org 2012-03-23T15:42:54+00:00 a45056e35c1af2a0f0a6eed258fd5fdf4846a79f This software provides the nat 4->6 translation needed for the "clat" part of the 464xlat standard. It is needed for better IPv4 application support while on an IPv6-only mobile network connection using 464xlat's nat64 (such as T-Mobile's IPv6 trial). A general diagram of how 464xlat works: http://dan.drown.org/android/clat/Clat-Plat.png Depends-on: I2392f8127dcd90d16b0f20ff31bcc5aa096db464 Change-Id: If2bc6916fc66fd4bca7cc241c83cfae839b82e15 Signed-off-by: Daniel Drown <dan-android@drown.org> 
This software provides the nat 4->6 translation needed for the "clat" part of
the 464xlat standard.  It is needed for better IPv4 application support while
on an IPv6-only mobile network connection using 464xlat's nat64 (such as
T-Mobile's IPv6 trial).

A general diagram of how 464xlat works:
http://dan.drown.org/android/clat/Clat-Plat.png

Depends-on: I2392f8127dcd90d16b0f20ff31bcc5aa096db464
Change-Id: If2bc6916fc66fd4bca7cc241c83cfae839b82e15
Signed-off-by: Daniel Drown <dan-android@drown.org>