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By putting slices into the pool, the slice header escapes. This can be avoided
by not putting the slice header into the pool.
This removes an allocation from the TCP segment send path.
PiperOrigin-RevId: 299215480
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Properly discard segments from the segment heap.
PiperOrigin-RevId: 298704074
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Ensures that all access to TransportEndpointInfo.ID is either:
* In a function ending in a Locked suffix.
* While holding the appropriate mutex.
This primary affects the checkV4Mapped method on affected endpoints, which has
been renamed to checkV4MappedLocked. Also document the method and change its
argument to be a value instead of a pointer which had caused some awkwardness.
This race was possible in the udp and icmp endpoints between Connect and uses
of TransportEndpointInfo.ID including in both itself and Bind.
The tcp endpoint did not suffer from this bug, but benefited from better
documentation.
Updates #357
PiperOrigin-RevId: 298682913
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PiperOrigin-RevId: 298451319
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A deadlock may occur if a write lock on a RWMutex is blocked between
nested read lock attempts as the inner read lock attempt will be
blocked in this scenario.
Example (T1 and T2 are differnt goroutines):
T1: obtain read-lock
T2: attempt write-lock (blocks)
T1: attempt inner/nested read-lock (blocks)
Here we can see that T1 and T2 are deadlocked.
Tests: Existing tests pass.
PiperOrigin-RevId: 298426678
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Call stack.Close on stacks when we are done with them in tcp_test. This avoids
leaking resources and reduces the test's flakiness when race/gotsan is enabled.
It also provides test coverage for the race also fixed in this change, which
can be reliably triggered with the stack.Close change (and without the other
changes) when race/gotsan is enabled.
The race was possible when calling Abort (via stack.Close) on an endpoint
processing a SYN segment as part of a passive connect.
Updates #1564
PiperOrigin-RevId: 297685432
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PiperOrigin-RevId: 297638665
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Tests:
- header_test.TestIsV6LinkLocalMulticastAddress
- header_test.TestScopeForIPv6Address
- stack_test.TestIPv6SourceAddressSelectionScopeAndSameAddress
PiperOrigin-RevId: 297215576
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TestCurrentConnectedIncrement fails consistently under gotsan due to the sleep
to check metrics is exactly the same as the TIME-WAIT duration. Under gotsan
things can be slow enough that the increment test is done before the protocol
goroutine is run after the TIME-WAIT timer expires and does its cleanup.
Increasing the sleep from 1s to 1.2s makes the test pass consistently.
PiperOrigin-RevId: 297160181
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Protocol dispatchers were previously leaked. Bypassing TIME_WAIT is required to
test this change.
Also fix a race when a socket in SYN-RCVD is closed. This is also required to
test this change.
PiperOrigin-RevId: 296922548
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PiperOrigin-RevId: 296526279
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Tests: stack_test.TestAttachToLinkEndpointImmediately
PiperOrigin-RevId: 296474068
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Test: stack_test.TestRouterSolicitation
PiperOrigin-RevId: 296454766
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TCP/IP will work with netstack networking. hostinet doesn't work, and sockets
will have the same behavior as it is now.
Before the userspace is able to create device, the default loopback device can
be used to test.
/proc/net and /sys/net will still be connected to the root network stack; this
is the same behavior now.
Issue #1833
PiperOrigin-RevId: 296309389
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- Disabled NICs will have their associated NDP state cleared.
- Disabled NICs will not accept incoming packets.
- Writes through a Route with a disabled NIC will return an invalid
endpoint state error.
- stack.Stack.FindRoute will not return a route with a disabled NIC.
- NIC's Running flag will report the NIC's enabled status.
Tests:
- stack_test.TestDisableUnknownNIC
- stack_test.TestDisabledNICsNICInfoAndCheckNIC
- stack_test.TestRoutesWithDisabledNIC
- stack_test.TestRouteWritePacketWithDisabledNIC
- stack_test.TestStopStartSolicitingRouters
- stack_test.TestCleanupNDPState
- stack_test.TestAddRemoveIPv4BroadcastAddressOnNICEnableDisable
- stack_test.TestJoinLeaveAllNodesMulticastOnNICEnableDisable
PiperOrigin-RevId: 296298588
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Added the ability to get/set the IP_RECVTCLASS socket option on UDP endpoints.
If enabled, traffic class from the incoming Network Header passed as ancillary
data in the ControlMessages.
Adding Get/SetSockOptBool to decrease the overhead of getting/setting simple
options. (This was absorbed in a CL that will be landing before this one).
Test:
* Added unit test to udp_test.go that tests getting/setting as well as
verifying that we receive expected TOS from incoming packet.
* Added a syscall test for verifying getting/setting
* Removed test skip for existing syscall test to enable end to end test.
PiperOrigin-RevId: 295840218
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$ iptables -N foochain
$ iptables -A INPUT -j foochain
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PiperOrigin-RevId: 294957297
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PiperOrigin-RevId: 294952610
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- Adds creation of user chains via `-N <chainname>`
- Adds `-j RETURN` support for built-in chains, which triggers the
chain's underflow rule (usually the default policy).
- Adds tests for chain creation, default policies, and `-j RETURN' from
built-in chains.
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PiperOrigin-RevId: 294500858
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PiperOrigin-RevId: 294340468
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Previously, a DAD event would not be sent if DAD was disabled.
This allows integrators to do some work when an IPv6 address is bound to
a NIC without special logic that checks if DAD is enabled.
Without this change, integrators would need to check if a NIC has DAD
enabled when an address is auto-generated. If DAD is enabled, it would
need to delay the work until the DAD completion event; otherwise, it
would need to do the work in the address auto-generated event handler.
Test: stack_test.TestDADDisabled
PiperOrigin-RevId: 293732914
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