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Inform the netstack integrator when the netstack receives an NDP Router
Advertisement message with the NDP DNS Search List option with at least
one domain name. The stack will not maintain any state related to the
search list - the integrator is expected to maintain any required state
and invalidate domain names after their lifetime expires, or refresh the
lifetime when a new one is received for a known domain name.
Test:
- header_test.TestNDPDNSSearchListOption
- header_test.TestNDPDNSSearchListOptionSerialize
- header_test.TestNDPSearchListOptionDomainNameLabelInvalidSymbols
- header_test.TestNDPOptionsIterCheck
- stack_test.TestNDPDNSSearchListDispatch
PiperOrigin-RevId: 307109375
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PiperOrigin-RevId: 307053624
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This previously changed in 305699233, but this behaviour turned out to
be load bearing.
PiperOrigin-RevId: 307033802
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Better validate NDP NAs options before updating the link address cache.
Test: stack_test.TestNeighorAdvertisementWithTargetLinkLayerOption
PiperOrigin-RevId: 306962924
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PiperOrigin-RevId: 306959393
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When the listening socket is read shutdown, we need to reset all pending
and incoming connections. Ensure that the endpoint is not cleaned up
from the demuxer and subsequent bind to same port does not go through.
PiperOrigin-RevId: 306958038
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Test: header_test.TestNDPOptionsIterCheck
PiperOrigin-RevId: 306953867
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This change makes SynRcvdCountThreshold and the global synRcvdCount into a stack
configurable value. This is required because in cases like mod_proxy which
create multiple Stack instances the count will be a global value that impacts
all Stack instances.
Further the tests relied on modifying the global threshold to simulate tests
where we want to verify SYN cookie based behaviour. This lead to data races due
to the global being modified/read without locks or atomics.
PiperOrigin-RevId: 306947723
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PiperOrigin-RevId: 306677789
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Remove useless casts and duplicate return statements.
PiperOrigin-RevId: 306627916
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Attempt to redeliver TCP segments that are enqueued into a closing
TCP endpoint. This was being done for Established endpoints but not
for those that are listening or performing connection handshake.
Fixes #2417
PiperOrigin-RevId: 306598155
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Tests now use a MinRTO of 3s instead of default 200ms. This reduced flakiness in
a lot of the congestion control/recovery tests which were flaky due to
retransmit timer firing too early in case the test executors were overloaded.
This change also bumps some of the timeouts in tests which were too sensitive to
timer variations and reduces the number of slow start iterations which can
make the tests run for too long and also trigger retansmit timeouts etc if
the executor is overloaded.
PiperOrigin-RevId: 306562645
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As per RFC 7217 section 6, attempt to regenerate IPv6 SLAAC address in response
to a DAD conflict if the address was generated with an opaque IID as outlined in
RFC 7217 section 5.
Test:
- stack_test.TestAutoGenAddrWithOpaqueIIDDADRetries
- stack_test.TestAutoGenAddrWithEUI64IIDNoDADRetries
- stack_test.TestAutoGenAddrContinuesLifetimesAfterRetry
PiperOrigin-RevId: 306555645
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PiperOrigin-RevId: 305807868
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Better validate NDP NS messages and their options before doing work in
response to them. Also make sure that NA messages sent in response to
an NS use the correct IPv6 and link-layer addresses so they are
routed properly and received by the right node.
Test: stack_test.TestNeighorSolicitationResponse
PiperOrigin-RevId: 305799054
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PiperOrigin-RevId: 305699233
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Updates #2243
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Updates #2243
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Test:
- header_test.TestIPv6ExtHdrIter
- ipv6_test.TestReceiveIPv6Fragments
Updates #2197, #2333
PiperOrigin-RevId: 305330178
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Software GSO implementation currently has a complicated code path with
implicit assumptions that all packets to WritePackets carry same Data
and it does this to avoid allocations on the path etc. But this makes it
hard to reuse the WritePackets API.
This change breaks all such assumptions by introducing a new Vectorised
View API ReadToVV which can be used to cleanly split a VV into multiple
independent VVs. Further this change also makes packet buffers linkable
to form an intrusive list. This allows us to get rid of the array of
packet buffers that are passed in the WritePackets API call and replace
it with a list of packet buffers.
While this code does introduce some more allocations in the benchmarks
it doesn't cause any degradation.
Updates #231
PiperOrigin-RevId: 304731742
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As per RFC 6980 section 5, nodes MUST silently ignore NDP messages if
the packet carrying them include an IPv6 Fragmentation Header.
Test: ipv6_test.TestNDPValidation
PiperOrigin-RevId: 304519379
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Tests:
- ipv6_test.TestHopLimitValidation
- ipv6_test.TestRouterAdvertValidation
PiperOrigin-RevId: 304495723
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Timeouts were increased to deflake pkg/tcpip/stack:stack_x_test tests
that depend on timers. Some timeouts used previously were intended for
tests that do not depend on timers, so this change updates those
timeouts to give more time for a timer-based event to occur. This
change also de-parallelizes non-subtests to reduce the number of active
timers.
Test: bazel test //pkg/tcpip/stack:stack_x_test --runs_per_test=500
PiperOrigin-RevId: 304287622
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PiperOrigin-RevId: 304098611
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Enables handling the Hop by Hop and Destination Options extension
headers, but options are not yet supported. All options will be
treated as unknown and their respective action will be followed.
Note, the stack does not yet support sending ICMPv6 error messages in
response to options that cannot be handled/parsed. That will come
in a later change (Issue #2211).
Tests:
- header_test.TestIPv6UnknownExtHdrOption
- header_test.TestIPv6OptionsExtHdrIterErr
- header_test.TestIPv6OptionsExtHdrIter
- ipv6_test.TestReceiveIPv6ExtHdrs
PiperOrigin-RevId: 303433085
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PiperOrigin-RevId: 303212189
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