0ec5dfa1da6a97532dc8cca825bae4edfb7d3dce |
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22-Sep-2014 |
Erik Kline <ek@google.com> |
Simplify and always retry DNS64 prefix discovery. - Only request AAAAs for the IPv4-only hostname, since that's all the information being used. Perhaps at some point in the future when _validation_ of the IPv4 address(es)'s presence within the IPv6 address(es) is being done this should be revisited. - Only use the first AAAA returned to find the DNS64 prefix. It's not clear how to properly resolve any potential DNS64 prefix conflicts anyway. - Re-try DNS64 prefix discovery on any type of error. If clatd was started (presumably an IPv6-only network), retry DNS64 prefix discovery with exponential backoff. Some "permanent" errors can be indistinguishable from transient errors (e.g. receiving an erroneous SERVFAIL from a DNS resolver, ...). - Fix-up back-off logic to not sleep 128 then 120, 120, ... :-) Bug: 17569702 Change-Id: I226ea7772cd7c88d2b60153ef76e5435400e11aa
/external/android-clat/dns64.c
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a1c871c8efad6c0b69e27d3b85e82a27e282b8be |
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30-May-2014 |
Paul Jensen <pauljensen@google.com> |
Make DNS request for plat prefix detection network specific. When plat prefix detection is done on a non-default network it must use the network specific version of getaddrinfo() so the plat prefix corresponds to the particular network. The network is specified to clatd via a NetID command line argument. Change-Id: I77a47b24e68c7786f790974f05787a40a4934af5
/external/android-clat/dns64.c
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baf62997b598ac38a99fd30419ccf7c109ffb3bc |
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01-Mar-2013 |
Lorenzo Colitti <lorenzo@google.com> |
Make clatd a bit more robust when started by netd. 1. When started from netd, DNS lookups (used to detect the NAT64 prefix) fail because ANDROID_DNS_MODE=local. Unset it. 2. Only add the SIGTERM handler just before starting the event loop. Otherwise, if clatd hangs before the event loop is started (e.g., when #1 happens), it can't be stopped. While I'm at it, add a couple of logging statements. Change-Id: Ie24b37e34b729ce6cd3769b5d64348f2c1b9627d
/external/android-clat/dns64.c
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a45056e35c1af2a0f0a6eed258fd5fdf4846a79f |
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23-Mar-2012 |
Daniel Drown <dan-android@drown.org> |
android clat service 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>
/external/android-clat/dns64.c
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