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2020-01-08Merge release-20191213.0-78-gd530df2 (automated)gVisor bot
2020-01-08Introduce tcpip.SockOptBoolTamir Duberstein
...and port V6OnlyOption to it. PiperOrigin-RevId: 288789451
2020-01-08Combine various Create*NIC methods into CreateNICWithOptions.Bert Muthalaly
PiperOrigin-RevId: 288779416
2020-01-08Merge release-20191213.0-76-ga271bcc (automated)gVisor bot
2020-01-08Rename tcpip.SockOpt{,Int}Tamir Duberstein
PiperOrigin-RevId: 288772878
2020-01-08Fix #1522 - implement silly window sydrome protection on rx sideMarek Majkowski
Before, each of small read()'s that raises window either from zero or above threshold of aMSS, would generate an ACK. In a classic silly-window-syndrome scenario, we can imagine a pessimistic case when small read()'s generate a stream of ACKs. This PR fixes that, essentially treating window size < aMSS as zero. We send ACK exactly in a moment when window increases to >= aMSS or half of receive buffer size (whichever smaller).
2020-01-07#1398 - send ACK when available buffer space gets larger than 1 MSSMarek Majkowski
When receiving data, netstack avoids sending spurious acks. When user does recv() should netstack send ack telling the sender that the window was increased? It depends. Before this patch, netstack _will_ send the ack in the case when window was zero or window >> scale was zero. Basically - when recv space increased from zero. This is not working right with silly-window-avoidance on the sender side. Some network stacks refuse to transmit segments, that will fill the window but are below MSS. Before this patch, this confuses netstack. On one hand if the window was like 3 bytes, netstack will _not_ send ack if the window increases. On the other hand sending party will refuse to transmit 3-byte packet. This patch changes that, making netstack will send an ACK when the available buffer size increases to or above 1*MSS. This will inform other party buffer is large enough, and hopefully uncork it. Signed-off-by: Marek Majkowski <marek@cloudflare.com>
2019-12-26Merge release-20191213.0-49-g87e4d03 (automated)gVisor bot
2019-12-26Automated rollback of changelist 287029703gVisor bot
PiperOrigin-RevId: 287217899
2019-12-24Merge release-20191213.0-48-ge013c48 (automated)gVisor bot
2019-12-24Enable IP_RECVTOS socket option for datagram socketsRyan Heacock
Added the ability to get/set the IP_RECVTOS socket option on UDP endpoints. If enabled, TOS from the incoming Network Header passed as ancillary data in the ControlMessages. 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 PiperOrigin-RevId: 287029703
2019-12-19Merge release-20191213.0-32-g57ce26c (automated)gVisor bot
2019-12-18net/tcp: allow to call listen without bindAndrei Vagin
When listen(2) is called on an unbound socket, the socket is automatically bound to a random free port with the local address set to INADDR_ANY. PiperOrigin-RevId: 286305906
2019-12-17Merge release-20191210.0-37-g3f4d8fe (automated)gVisor bot
2019-12-17Internal change.gVisor bot
PiperOrigin-RevId: 286003946
2019-12-12Merge release-20191210.0-23-g6fc9f0a (automated)gVisor bot
2019-12-11Add support for TCP_USER_TIMEOUT option.Bhasker Hariharan
The implementation follows the linux behavior where specifying a TCP_USER_TIMEOUT will cause the resend timer to honor the user specified timeout rather than the default rto based timeout. Further it alters when connections are timedout due to keepalive failures. It does not alter the behavior of when keepalives are sent. This is as per the linux behavior. PiperOrigin-RevId: 285099795
2019-12-11Merge release-20191129.0-48-g0d02726 (automated)gVisor bot
2019-12-09Merge release-20191129.0-29-g18af75d (automated)gVisor bot
2019-12-09Add UDP SO_REUSEADDR support to the port manager.Ian Gudger
Next steps include adding support to the transport demuxer and the UDP endpoint. PiperOrigin-RevId: 284652151
2019-12-07Merge release-20191129.0-19-gb1d44be (automated)gVisor bot
2019-12-06Add TCP stats for connection close and keep-alive timeouts.Mithun Iyer
Fix bugs in updates to TCP CurrentEstablished stat. Fixes #1277 PiperOrigin-RevId: 284292459
2019-12-06Merge release-20191129.0-17-g3e84777 (automated)gVisor bot
2019-12-06Fix flakiness in tcp_test.Bhasker Hariharan
This change marks the socket as ESTABLISHED and creates the receiver and sender the moment we send the final ACK in case of an active TCP handshake or when we receive the final ACK for a passive TCP handshake. Before this change there was a short window in which an ACK can be received and processed but the state on the socket is not yet ESTABLISHED. This can be seen in TestConnectBindToDevice which is flaky because sometimes the socket is in SYN-SENT and not ESTABLISHED even though the other side has already received the final ACK of the handshake. PiperOrigin-RevId: 284277713
2019-12-04Merge release-20191114.0-57-gcf7f27c (automated)gVisor bot
2019-12-03net/udp: return a local route address as the bound-to addressAndrei Vagin
If the socket is bound to ANY and connected to a loopback address, getsockname() has to return the loopback address. Without this fix, getsockname() returns ANY. PiperOrigin-RevId: 283647781
2019-12-03Merge release-20191114.0-55-g27e2c4d (automated)gVisor bot
2019-12-03Fix panic due to early transition to Closed.Bhasker Hariharan
The code in rcv.consumeSegment incorrectly transitions to CLOSED state from LAST-ACK before the final ACK for the FIN. Further if receiving a segment changes a socket to a closed state then we should not invoke the sender as the socket is now closed and sending any segments is incorrect. PiperOrigin-RevId: 283625300
2019-11-28Test handling segments on completed but not yet accepted TCP connectionsGhanan Gowripalan
This change does not introduce any new features, or modify existing ones. This change tests handling TCP segments right away for connections that were completed from a listening endpoint. PiperOrigin-RevId: 282986457
2019-11-25Merge release-20191114.0-28-g1641338 (automated)gVisor bot
2019-11-25Set transport and network headers on outbound packets.Kevin Krakauer
These are necessary for iptables to read and parse headers for packet filtering. PiperOrigin-RevId: 282372811
2019-11-23Cleanup visibility.Adin Scannell
PiperOrigin-RevId: 282194656
2019-11-23Merge release-20191114.0-25-gb0a1bbd (automated)gVisor bot
2019-11-22Internal change.Adin Scannell
PiperOrigin-RevId: 282068093
2019-11-22Merge release-20191114.0-23-g8eb6891 (automated)gVisor bot
2019-11-22Store SO_BINDTODEVICE state at bind.Ian Gudger
This allows us to ensure that the correct port reservation is released. Fixes #1217 PiperOrigin-RevId: 282048155
2019-11-22Merge release-20191114.0-22-g9db08c4 (automated)gVisor bot
2019-11-22Use PacketBuffers with GSO.Kevin Krakauer
PiperOrigin-RevId: 282045221
2019-11-22Merge release-20191114.0-21-gf27f38d (automated)gVisor bot
2019-11-22Add segment dequeue check while emptying segment queue.Mithun Iyer
PiperOrigin-RevId: 282023891
2019-11-15Merge release-20191104.0-47-g3e534f2 (automated)gVisor bot
2019-11-15Handle in-flight TCP segments when moving to CLOSE.Mithun Iyer
As we move to CLOSE state from LAST-ACK or TIME-WAIT, ensure that we re-match all in-flight segments to any listening endpoint. Also fix LISTEN state handling of any ACK segments as per RFC793. Fixes #1153 PiperOrigin-RevId: 280703556
2019-11-14Merge release-20191104.0-40-g3f7d937 (automated)gVisor bot
2019-11-14Use PacketBuffers for outgoing packets.Kevin Krakauer
PiperOrigin-RevId: 280455453
2019-11-13Merge release-20191104.0-38-g6dd4c9e (automated)gVisor bot
2019-11-13Fix flaky behaviour during S/R.Bhasker Hariharan
PiperOrigin-RevId: 280280156
2019-11-12Do not handle TCP packets that include a non-unicast IP addressGhanan Gowripalan
This change drops TCP packets with a non-unicast IP address as the source or destination address as TCP is meant for communication between two endpoints. Test: Make sure that if the source or destination address contains a non-unicast address, no TCP packet is sent in response and the packet is dropped. PiperOrigin-RevId: 280073731
2019-11-12Merge release-20190806.1-396-g57a2a5e (automated)gVisor bot
2019-11-12Add tests for SO_REUSEADDR and SO_REUSEPORT.Ian Gudger
* Basic tests for the SO_REUSEADDR and SO_REUSEPORT options. * SO_REUSEADDR functional tests for TCP and UDP. * SO_REUSEADDR and SO_REUSEPORT interaction tests for UDP. * Stubbed support for UDP getsockopt(SO_REUSEADDR). PiperOrigin-RevId: 280049265
2019-11-11Merge release-20190806.1-389-g7730716 (automated)gVisor bot
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