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2021-02-09Merge release-20210201.0-60-g95500ece5 (automated)gVisor bot
2021-02-08Allow UDP sockets connect()ing to port 0Zeling Feng
We previously return EINVAL when connecting to port 0, however this is not the observed behavior on Linux. One of the observable effects after connecting to port 0 on Linux is that getpeername() will fail with ENOTCONN. PiperOrigin-RevId: 356413451
2021-02-08Merge release-20210201.0-55-gfe63db2e9 (automated)gVisor bot
2021-02-08RACK: Detect lossNayana Bidari
Detect packet loss using reorder window and re-transmit them after the reorder timer expires. PiperOrigin-RevId: 356321786
2021-02-03Merge release-20210125.0-74-ge3bce9689 (automated)gVisor bot
2021-02-03Add a function to enable RACK in tests.Nayana Bidari
- Adds a function to enable RACK in tests. - RACK update functions are guarded behind the flag tcpRecovery. PiperOrigin-RevId: 355435973
2021-02-02Merge release-20210125.0-63-g49f783fb6 (automated)gVisor bot
2021-02-02Rename HandleNDupAcks in TCP.Nayana Bidari
Rename HandleNDupAcks() to HandleLossDetected() as it will enter this when is detected after: - reorder window expires and TLP (in case of RACK) - dupAckCount >= 3 PiperOrigin-RevId: 355237858
2021-02-02Merge release-20210125.0-58-g8c7c5abaf (automated)gVisor bot
2021-02-02Add support for rate limiting out of window ACKs.Bhasker Hariharan
Netstack today will send dupACK's with no rate limit for incoming out of window segments. This can result in ACK loops for example if a TCP socket connects to itself (actually permitted by TCP). Where the ACK sent in response to packets being out of order itself gets considered as an out of window segment resulting in another ACK being generated. PiperOrigin-RevId: 355206877
2021-02-01Merge release-20210125.0-47-gebd3912c0 (automated)gVisor bot
2021-02-01Refactor HandleControlPacket/SockErrorGhanan Gowripalan
...to remove the need for the transport layer to deduce the type of error it received. Rename HandleControlPacket to HandleError as HandleControlPacket only handles errors. tcpip.SockError now holds a tcpip.SockErrorCause interface that different errors can implement. PiperOrigin-RevId: 354994306
2021-01-31Hide neighbor table kind from NetworkEndpointGhanan Gowripalan
The network endpoint should not need to have logic to handle different kinds of neighbor tables. Network endpoints can let the NIC know about differnt neighbor discovery messages and let the NIC decide which table to update. This allows us to remove the LinkAddressCache interface. PiperOrigin-RevId: 354812584
2021-01-29Merge release-20210125.0-24-gff4fc4278 (automated)gVisor bot
2021-01-28RACK: Update reorder window.Nayana Bidari
After receiving an ACK(cumulative or selective), RACK will update the reorder window which is used as a settling time before marking the packet as lost. This change will add an init function to initialize the variables in RACK and also store the reference to sender in rackControl. The reorder window is calculated as per rfc: https://tools.ietf.org/html/draft-ietf-tcpm-rack-08#section-7.2 Step 4. PiperOrigin-RevId: 354453528
2021-01-29Merge release-20210125.0-21-g8d1afb418 (automated)gVisor bot
2021-01-28Change tcpip.Error to an interfaceTamir Duberstein
This makes it possible to add data to types that implement tcpip.Error. ErrBadLinkEndpoint is removed as it is unused. PiperOrigin-RevId: 354437314
2021-01-28Merge release-20210125.0-12-g6012fe9b5 (automated)gVisor bot
2021-01-28Respect SO_BINDTODEVICE in unconnected UDP writesMarina Ciocea
Previously, sending on an unconnected UDP socket would ignore the SO_BINDTODEVICE option. Send on the configured interface when an UDP socket is bound to an interface through setsockop SO_BINDTODEVICE. Add packetimpact tests exercising UDP reads and writes with every combination of bound/unbound, broadcast/multicast/unicast destination, and bound/not-bound to device. PiperOrigin-RevId: 354299670
2021-01-28Merge release-20210125.0-11-gb85b23e50 (automated)gVisor bot
2021-01-27Confirm neighbor reachability with TCP ACKsGhanan Gowripalan
As per RFC 4861 section 7.3.1, A neighbor is considered reachable if the node has recently received a confirmation that packets sent recently to the neighbor were received by its IP layer. Positive confirmation can be gathered in two ways: hints from upper-layer protocols that indicate a connection is making "forward progress", or receipt of a Neighbor Advertisement message that is a response to a Neighbor Solicitation message. This change adds support for TCP to let the IP/link layers know that a neighbor is reachable. Test: integration_test.TestTCPConfirmNeighborReachability PiperOrigin-RevId: 354222833
2021-01-28Merge release-20210112.0-104-g99988e45e (automated)gVisor bot
2021-01-27Add support for more fields in netstack for TCP_INFONayana Bidari
This CL adds support for the following fields: - RTT, RTTVar, RTO - send congestion window (sndCwnd) and send slow start threshold (sndSsthresh) - congestion control state(CaState) - ReorderSeen PiperOrigin-RevId: 354195361
2021-01-27Merge release-20210112.0-98-g8e6604474 (automated)gVisor bot
2021-01-26Initialize the send buffer handler in endpoint creation.Nayana Bidari
- This CL will initialize the function handler used for getting the send buffer size limits during endpoint creation and does not require the caller of SetSendBufferSize(..) to know the endpoint type(tcp/udp/..) PiperOrigin-RevId: 353992634
2021-01-26Merge release-20210112.0-96-gce39f8298 (automated)gVisor bot
2021-01-26Implement error on pointersTamir Duberstein
This improves type-assertion safety. PiperOrigin-RevId: 353931228
2021-01-26Merge release-20210112.0-95-ga90661654 (automated)gVisor bot
2021-01-26Fix couple of potential route leaks.Bhasker Hariharan
connect() can be invoked multiple times on UDP/RAW sockets and in such a case we should release the cached route from the previous connect. Fixes #5359 PiperOrigin-RevId: 353919891
2021-01-26Merge release-20210112.0-92-g9ba24d449 (automated)gVisor bot
2021-01-26Drop nicID from transport endpoint reg/cleanup fnsGhanan Gowripalan
...as it is unused. PiperOrigin-RevId: 353896981
2021-01-26Merge release-20210112.0-90-gdaf0d3f6c (automated)gVisor bot
2021-01-26Move SO_SNDBUF to socketops.Nayana Bidari
This CL moves {S,G}etsockopt of SO_SNDBUF from all endpoints to socketops. For unix sockets, we do not support setting of this option. PiperOrigin-RevId: 353871484
2021-01-25Merge release-20210112.0-81-g8bded326c (automated)gVisor bot
2021-01-25Unlock tcp endpoint on zero-length atomic writesTamir Duberstein
Rewrite tcp.endpoint.Write to avoid manual locking and unlocking. This should prevent similar mistakes in the future. PiperOrigin-RevId: 353675734
2021-01-22Merge release-20210112.0-74-g6c0e1d9cf (automated)gVisor bot
2021-01-22Define tcpip.Payloader in terms of io.ReaderTamir Duberstein
Fixes #1509. PiperOrigin-RevId: 353295589
2021-01-16Merge release-20210112.0-37-g12d979083 (automated)gVisor bot
2021-01-15Remove count argument from tcpip.Endpoint.ReadTamir Duberstein
The same intent can be specified via the io.Writer. PiperOrigin-RevId: 352098747
2021-01-15Merge release-20210112.0-36-gf37ace666 (automated)gVisor bot
2021-01-15Merge release-20210112.0-34-g55c7fe48d (automated)gVisor bot
2021-01-15[rack] Retransmit the probe segment after the probe timer expires.Ayush Ranjan
This change implements TLP details enumerated in https://tools.ietf.org/html/draft-ietf-tcpm-rack-08#section-7.5.2. Fixes #5084 PiperOrigin-RevId: 352093473
2021-01-15Populate EgressRoute, GSO, Netproto for batch writesGhanan Gowripalan
We loop over the list of packets anyways so setting these aren't expensive. Now that they are populated only by the link endpoint that uses them, TCP does not need to. PiperOrigin-RevId: 352090853
2021-01-15Merge release-20210112.0-25-ge57ebcd37 (automated)gVisor bot
2021-01-14Remove impossible errorsTamir Duberstein
Commit 25b5ec7 moved link address resolution out of the transport layer; special handling of link address resolution is no longer necessary in tcp. PiperOrigin-RevId: 351839254
2021-01-14Merge release-20201216.0-105-g25b5ec713 (automated)gVisor bot
2021-01-13Do not resolve remote link address at transport layerGhanan Gowripalan
Link address resolution is performed at the link layer (if required) so we can defer it from the transport layer. When link resolution is required, packets will be queued and sent once link resolution completes. If link resolution fails, the transport layer will receive a control message indicating that the stack failed to route the packet. tcpip.Endpoint.Write no longer returns a channel now that writes do not wait for link resolution at the transport layer. tcpip.ErrNoLinkAddress is no longer used so it is removed. Removed calls to stack.Route.ResolveWith from the transport layer so that link resolution is performed when a route is created in response to an incoming packet (e.g. to complete TCP handshakes or send a RST). Tests: - integration_test.TestForwarding - integration_test.TestTCPLinkResolutionFailure Fixes #4458 RELNOTES: n/a PiperOrigin-RevId: 351684158
2021-01-13Clean up the dummy network interface used by UDP testsArthur Sfez
It is now composed by a NetworkInterface interface which lets us delete the methods we don't need. PiperOrigin-RevId: 351613267
2021-01-13Merge release-20201216.0-96-g19ab0f15f (automated)gVisor bot
2021-01-13[rack] TLP: Recovery detection.Ayush Ranjan
This change implements TLP details enumerated in https://tools.ietf.org/html/draft-ietf-tcpm-rack-08#section-7.6 Fixes #5131 PiperOrigin-RevId: 351558449
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