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2021-05-26Merge release-20210518.0-45-gfcad6f91a (automated)gVisor bot
2021-05-26Use the stack clock everywhereTamir Duberstein
Updates #5939. Updates #6012. RELNOTES: n/a PiperOrigin-RevId: 375931554
2021-05-25Merge release-20210518.0-38-g4f2439fb0 (automated)gVisor bot
2021-05-25Use opaque types to represent timeTamir Duberstein
Introduce tcpip.MonotonicTime; replace int64 in tcpip.Clock method returns with time.Time and MonotonicTime to improve type safety and ensure that monotonic clock readings are never compared to wall clock readings. PiperOrigin-RevId: 375775907
2021-05-22Merge release-20210518.0-25-g74b10e31a (automated)gVisor bot
2021-05-22Remove detritusTamir Duberstein
- Unused constants - Unused functions - Unused arguments - Unkeyed literals - Unnecessary conversions PiperOrigin-RevId: 375253464
2021-05-21Merge release-20210510.0-72-g821cec3f1 (automated)gVisor bot
2021-05-21Add aggregated NIC statsArthur Sfez
This change also includes miscellaneous improvements: * UnknownProtocolRcvdPackets has been separated into two stats, to specify at which layer the unknown protocol was found (L3 or L4) * MalformedRcvdPacket is not aggregated across every endpoint anymore. Doing it this way did not add useful information, and it was also error-prone (example: ipv6 forgot to increment this aggregated stat, it only incremented its own ipv6.MalformedPacketsReceived). It is now only incremented the NIC. * Removed TestStatsString test which was outdated and had no real utility. PiperOrigin-RevId: 375057472
2021-05-21Merge release-20210510.0-66-g9157a91a4 (automated)gVisor bot
2021-05-20Add protocol state to TCPINFOMithun Iyer
Add missing protocol state to TCPINFO struct and update packetimpact. This re-arranges the TCP state definitions to align with Linux. Fixes #478 PiperOrigin-RevId: 374996751
2021-05-14Merge release-20210510.0-31-g7ea2dcbae (automated)gVisor bot
2021-05-13Apply SWS avoidance to ACKs with window updatesMithun Iyer
When recovering from a zero-receive-window situation, and asked to send out an ACK, ensure that we apply SWS avoidance in our window updates. Fixes #5984 PiperOrigin-RevId: 373689578
2021-05-12Merge release-20210503.0-48-gba6de2153 (automated)gVisor bot
2021-05-12Fix not calling decRef on merged segmentsTing-Yu Wang
This code path is for outgoing packets, and we don't currently do memory accounting on this path. So it wasn't breaking anything. This change did not add a test for ref-counting issue fixed, but will switch to the leak-checking ref-counter later when all ref-counting issues are fixed. PiperOrigin-RevId: 373447913
2021-05-05Merge release-20210419.0-68-g61615f3f1 (automated)gVisor bot
2021-05-05Fix a race in reading last seen ICMP error during handshakeMithun Iyer
On receiving an ICMP error during handshake, the error is propagated by reading `endpoint.lastError`. This can race with the socket layer invoking getsockopt() with SO_ERROR where the same value is read and cleared, causing the handshake to bail out with a non-error state. Fix the race by checking for lastError state and failing the handshake with ErrConnectionAborted if the lastError was read and cleared by say SO_ERROR. The race mentioned in the bug, is caught only with the newly added tcp_test unit test, where we have control over stopping/resuming protocol loop. Adding a packetimpact test as well for sanity testing of ICMP error handling during handshake. Fixes #5922 PiperOrigin-RevId: 372135662
2021-05-04Fix tcp_test listen backlog expectationMithun Iyer
Listen backlog value is 1 more than what is configured by the socket layer listen call. TestListenBacklogFull expects this behavior which is incorrect as it directly invokes endpoint Listen and with cl/369974744, backlog++ logic is moved to the callers of Listen(). This test passes sometimes, because the handshakes could overlap causing the last SYN to arrive at the listener before the previous handshake is enqueued to the accept queue. In such a case the accept queue is still not full and the SYN is replied to. The final ACK of this last handshake would get dropped eventually. PiperOrigin-RevId: 372041827
2021-05-04Use cmp.Diff for tcpip.Error comparisonMithun Iyer
PiperOrigin-RevId: 372021039
2021-05-03Convey GSO capabilities through GSOEndpointGhanan Gowripalan
...as all GSO capable endpoints must implement GSOEndpoint. PiperOrigin-RevId: 371804175
2021-04-29Merge release-20210419.0-46-gc958c5a4f (automated)gVisor bot
2021-04-29Fix up TODOs in the codeFabricio Voznika
PiperOrigin-RevId: 371231148
2021-04-22Merge release-20210419.0-22-g2739cf462 (automated)gVisor bot
2021-04-22Fix AF_UNIX listen() w/ zero backlog.Bhasker Hariharan
In https://github.com/google/gvisor/commit/f075522849fa a check to increase zero to a minimum backlog length was removed from sys_socket.go to bring it in parity with linux and then in tcp/endpoint.go we bump backlog by 1. But this broke calling listen on a AF_UNIX socket w/ a zero backlog as in linux it does allow 1 connection even with a zero backlog. This was caught by a php runtime test socket_abstract_path.phpt. PiperOrigin-RevId: 369974744
2021-04-22Merge release-20210419.0-18-g47bc11515 (automated)gVisor bot
2021-04-21Only carry GSO options in the packet bufferGhanan Gowripalan
With this change, GSO options no longer needs to be passed around as a function argument in the write path. This change is done in preparation for a later change that defers segmentation, and may change GSO options for a packet as it flows down the stack. Updates #170. PiperOrigin-RevId: 369774872
2021-04-20Merge release-20210412.0-37-g3fff4c4a0 (automated)gVisor bot
2021-04-20Move SO_RCVBUF to socketops.Nayana Bidari
Fixes #2926, #674 PiperOrigin-RevId: 369457123
2021-04-20Merge release-20210412.0-36-g2c8379d95 (automated)gVisor bot
2021-04-20Expose header methods that validate checksumsArthur Sfez
This is done for IPv4, UDP and TCP headers. This also changes the packet checkers used in tests to error on zero-checksum, not sure why it was allowed before. And while I'm here, make comments' case consistent. RELNOTES: n/a Fixes #5049 PiperOrigin-RevId: 369383862
2021-04-19Merge release-20210412.0-34-g20b1c3c63 (automated)gVisor bot
2021-04-19De-duplicate TCP state in TCPEndpointState vs tcp.endpointNick Brown
This change replaces individual private members in tcp.endpoint with a single private TCPEndpointState member. Some internal substructures within endpoint (receiver, sender) have been broken into a public substructure (which is then copied into the TCPEndpointState returned from completeState()) alongside other private fields. Fixes #4466 PiperOrigin-RevId: 369329514
2021-04-19Fix TCP RACK flaky unit tests.Nayana Bidari
- Added delay to increase the RTT: In DSACK tests with RACK enabled and low RTT, TLP can be detected before sending ACK and the tests flake. Increasing the RTT will ensure that TLP does not happen before the ACK is sent. - Fix TestRACKOnePacketTailLoss: The ACK does not contain DSACK, which means either the original or retransmission (probe) was lost and SACKRecovery count must be incremented. Before: http://sponge2/c9bd51de-f72f-481c-a7f3-e782e7524883 After: http://sponge2/1307a796-103a-4a45-b699-e8d239220ed1 PiperOrigin-RevId: 369305720
2021-04-16Merge release-20210408.0-44-g32c18f443 (automated)gVisor bot
2021-04-16Enlarge port range and fix integer overflowKevin Krakauer
Also count failed TCP port allocations PiperOrigin-RevId: 368939619
2021-04-15Reduce tcp_x_test runtime and memory usageKevin Krakauer
Reduce the ephemeral port range, which decreases the calls to makeEP. PiperOrigin-RevId: 368748379
2021-04-15Use nicer formatting for IP addresses in testsKevin Krakauer
This was semi-automated -- there are many addresses that were not replaced. Future commits should clean those up. Parse4 and Parse6 were given their own package because //pkg/test can introduce dependency cycles, as it depends transitively on //pkg/tcpip and some other netstack packages. PiperOrigin-RevId: 368726528
2021-04-13Merge release-20210408.0-27-g326394b79 (automated)gVisor bot
2021-04-13Fix listener close, client connect raceMithun Iyer
Fix a race where the ACK completing the handshake can be dropped by a closing listener without RST to the peer. The listener close would reset the accepted queue and that causes the connecting endpoint in SYNRCVD state to drop the ACK thinking the queue if filled up. PiperOrigin-RevId: 368165509
2021-04-12Merge release-20210408.0-21-ga804b42fe (automated)gVisor bot
2021-04-12Drop locks before calling waiterQueue.NotifyTamir Duberstein
Holding this lock can cause the user's callback to deadlock if it attempts to inspect the accept queue. PiperOrigin-RevId: 368068334
2021-04-10Merge release-20210408.0-19-gc84ff9912 (automated)gVisor bot
2021-04-10Use the SecureRNG to generate listener noncesTamir Duberstein
Some other cleanup while I'm here: - Remove unused arguments - Handle some unhandled errors - Remove redundant casts - Remove redundant parens - Avoid shadowing `hash` package name PiperOrigin-RevId: 367816161
2021-04-10Merge release-20210408.0-18-g2fea7d096 (automated)gVisor bot
2021-04-10Don't store accepted endpoints in a channelTamir Duberstein
Use a linked list with cached length and capacity. The current channel is already composed with a mutex and condition variable, and is never used for its channel-like properties. Channels also require eager allocation equal to their capacity, which a linked list does not. PiperOrigin-RevId: 367766626
2021-04-09Merge release-20210408.0-13-gdc8f6c691 (automated)gVisor bot
2021-04-09Move maxListenBacklog check to sentryMithun Iyer
Move maxListenBacklog check to the caller of endpoint Listen so that it is applicable to Unix domain sockets as well. This was changed in cl/366935921. Reported-by: syzbot+a35ae7cdfdde0c41cf7a@syzkaller.appspotmail.com PiperOrigin-RevId: 367728052
2021-04-09Merge release-20210408.0-11-g070b76fe7 (automated)gVisor bot
2021-04-09Remove duplicate accept queue fullness checkTamir Duberstein
Both code paths perform this check; extract it and remove the comment that suggests it is unique to one of the paths. PiperOrigin-RevId: 367666160
2021-04-09Merge release-20210408.0-10-g1fe5dd8c6 (automated)gVisor bot
2021-04-09Propagate SYN handling errorTamir Duberstein
Both callers of this function still drop this error on the floor, but progress is progress. Updates #4690. PiperOrigin-RevId: 367604788
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