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2019-02-13Add support for using PACKET_RX_RING to receive packets.Bhasker Hariharan
PACKET_RX_RING allows the use of an mmapped buffer to receive packets from the kernel. This should cut down the number of host syscalls that need to be made to receive packets when the underlying fd is a socket of the AF_PACKET type. PiperOrigin-RevId: 233834998 Change-Id: I8060025c6ced206986e94cc46b8f382b81bfa47f
2019-02-11Do not drop packets w/ missing TCP timestamps.Bhasker Hariharan
RFC7323 recommends that if the timestamp option was negotiated then all packets should carry a TCP Timestamp and any packets that do not should be dropped. Netstack implemented this behaviour. Linux OTOH does not and will accept such packets. This change makes Netstack behaviour compatible with Linux. Also now that we allow such packets, we do need to update RTO calculations based on these packets even if timestamp option is enabled. PiperOrigin-RevId: 233432268 Change-Id: I9f4742ae6b63930ac3b5e37d8c238761e6a4b29f
2019-02-08Fix build error.Ian Gudger
PiperOrigin-RevId: 233139020 Change-Id: I2e7089fa25d20e5662eb941054a684d41f5d3e12
2019-02-07Plumb IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP to netstack.Ian Gudger
Also includes a few fixes for IPv4 multicast support. IPv6 support is coming in a followup CL. PiperOrigin-RevId: 233008638 Change-Id: If7dae6222fef43fda48033f0292af77832d95e82
2019-02-07Internal change.Googler
PiperOrigin-RevId: 232937200 Change-Id: I5c3709cc8f1313313ff618a45e48c14a3a111cb4
2019-01-31Remove license commentsMichael Pratt
Nothing reads them and they can simply get stale. Generated with: $ sed -i "s/licenses(\(.*\)).*/licenses(\1)/" **/BUILD PiperOrigin-RevId: 231818945 Change-Id: Ibc3f9838546b7e94f13f217060d31f4ada9d4bf0
2019-01-29Fix IsLost check to match the description in RFC6675.Bhasker Hariharan
quoting what "rscheff@gmx.at" pointed out over email. "IsLost in RFC3517 is defined as >= (DupThresh * SMSS) while RFC6675 improves upon this, and defines IsLost as > ((DupThresh - 1) * SMSS + 1). The latter addresses situations where partial segments (size < MSS) are sent (eg. last segment of a http protocol message sent with PSH being less than MSS is common)." PiperOrigin-RevId: 231512331 Change-Id: I1addd4a92e3e7baeb0bdda46463ebfae435da958
2019-01-29Fix NIC endpoint forwarding.Ian Gudger
Also adds a test for regular NIC forwarding. PiperOrigin-RevId: 231495279 Change-Id: Ic7edec249568e9ad0280cea77eac14478c9073e1
2019-01-29Use recvmmsg() instead of readv() to read packets from NIC.Bhasker Hariharan
This should reduce the number of syscalls required to process packets significantly and improve throughputs. PiperOrigin-RevId: 231366886 Change-Id: I8b38077262bf9c53176bc4a94b530188d3d7c0ca
2019-01-15test: Tag tcp_test as flaky.Kevin Krakauer
PiperOrigin-RevId: 229427852 Change-Id: I9de8ed63f4a7672dacd3b282c863c599d00acd52
2019-01-14netstack: release port inline for listening sockets only.Zhaozhong Ni
PiperOrigin-RevId: 229243918 Change-Id: Ie14ef34e66ae851ed080f57b7d26a369a66f7664
2019-01-11Internal change.Googler
PiperOrigin-RevId: 228979583 Change-Id: I69bd82def48ceb19bc8558c890622b8528d98764
2019-01-08Implement Stringer for tcpip.StatCounterBert Muthalaly
This enables formatting tcpip.Stats readably with %+v. PiperOrigin-RevId: 228379088 Change-Id: I6a9876454a22f151ee752cf94589b4188729458f
2018-12-28Implement SO_REUSEPORT for TCP and UDP socketsAndrei Vagin
This option allows multiple sockets to be bound to the same port. Incoming packets are distributed to sockets using a hash based on source and destination addresses. This means that all packets from one sender will be received by the same server socket. PiperOrigin-RevId: 227153413 Change-Id: I59b6edda9c2209d5b8968671e9129adb675920cf
2018-12-21Stub out SO_OOBINLINE.Ian Gudger
We don't explicitly support out-of-band data and treat it like normal in-band data. This is equilivent to SO_OOBINLINE being enabled, so always report that it is enabled. PiperOrigin-RevId: 226572742 Change-Id: I4c30ccb83265e76c30dea631cbf86822e6ee1c1b
2018-12-21Internal ChangeMichael Pratt
PiperOrigin-RevId: 226542979 Change-Id: Ife11ebd0a85b8a63078e6daa71b4a99a82080ac9
2018-12-21Implement SO_KEEPALIVE, TCP_KEEPIDLE, and TCP_KEEPINTVL.Ian Gudger
Within gVisor, plumb new socket options to netstack. Within netstack, fix GetSockOpt and SetSockOpt return value logic. PiperOrigin-RevId: 226532229 Change-Id: If40734e119eed633335f40b4c26facbebc791c74
2018-12-16Allow sending of multicast and IPv6 link-local packets w/o route.Chris Kuiper
Same as with broadcast packets, sending of a multicast packet shouldn't require accessing the route table. The same applies to IPv6 link-local addresses, which aren't routable at all (they don't belong to any subnet by definition). PiperOrigin-RevId: 225775870 Change-Id: Ic53e6560c125a83be2be9c3d112e66b36e8dfe7b
2018-12-13transport/tcp: remove unused error return valuesIan Gudger
PiperOrigin-RevId: 225421480 Change-Id: I1e9259b0b7e8490164e830b73338a615129c7f0e
2018-12-09Stub out TCP_QUICKACKIan Gudger
PiperOrigin-RevId: 224696233 Change-Id: I45c425d9e32adee5dcce29ca7439a06567b26014
2018-12-06Allow sending of broadcast packets w/o route.Chris Kuiper
Currently sending a broadcast packet (for DHCP, e.g.) requires a "default route" of the format "0.0.0.0/0 via 0.0.0.0 <intf>". There is no good reason for this and on devices with several ports this creates a rather akward route table with lots of such default routes (which defeats the purpose of a default route). PiperOrigin-RevId: 224378769 Change-Id: Icd7ec8a206eb08083cff9a837f6f9ab231c73a19
2018-12-06Fix tcpip.Endpoint.Write contract regarding short writesIan Gudger
* Clarify tcpip.Endpoint.Write contract regarding short writes. * Enforce tcpip.Endpoint.Write contract regarding short writes. * Update relevant users of tcpip.Endpoint.Write. PiperOrigin-RevId: 224377586 Change-Id: I24299ecce902eb11317ee13dae3b8d8a7c5b097d
2018-12-05sentry: support save / restore of TCP bind socket after shutdown.Zhaozhong Ni
PiperOrigin-RevId: 224227677 Change-Id: I08b0e0c0574170556269900653e5bcf9e9e5c9c9
2018-12-05sentry: skip waiting for undrain for netstack TCP endpoints in error state.Zhaozhong Ni
PiperOrigin-RevId: 224214981 Change-Id: I4c1dd5b1c856f7a4f9866a5dda44a5297e92486a
2018-12-04Remove incorrect code and improve testing of Stack.GetMainNICAddressChris Kuiper
This removes code that should have never made it in in the first place, but did so due to incomplete testing. With the new tests the original code fails, the new code passes. PiperOrigin-RevId: 224086966 Change-Id: I646fef76977f4528f3705f497b95fad6b3ec32bc
2018-12-04Whitelist Go 1.12 for tcpip/time_unsafe.goIan Gudger
The signature of time.now has remained unchanged: https://github.com/golang/go/blob/c2412a7681d5beaeb5a4ceef3b2b7886361282ce/src/time/time.go#L1072 PiperOrigin-RevId: 224061160 Change-Id: Ic84bd6ee8fb9952cd9ab580bcb0892444ce7c2da
2018-12-04Fix available calculation when merging TCP segmentsIan Gudger
PiperOrigin-RevId: 224033418 Change-Id: I780be973e8be68ac93e8c9e7a100002e912f40d2
2018-12-04sentry: save copy of tcp segment's delivered views to avoid in-struct pointers.Zhaozhong Ni
PiperOrigin-RevId: 224033238 Change-Id: Ie5b1854b29340843b02c123766d290a8738d7631
2018-11-29Test that full segments will be sent when delay/cork is enabledIan Gudger
PiperOrigin-RevId: 223425575 Change-Id: Idd777e04c69e6ffcbfb0bdbea828a8b8b42d7672
2018-11-21Make ToView non-allocating for single VectorizedViews containing a single ViewIan Gudger
PiperOrigin-RevId: 222483471 Change-Id: I6720690b20167dd541fdfa5218eba7c9f7483347
2018-11-15Process delayed packets when delay is disabledIan Gudger
Moving the wakeup logic into the disable blocks is an optimization. PiperOrigin-RevId: 221677028 Change-Id: Ib5a5a6d52cc77b4bbc5dedcad9ee1dbb3da98deb
2018-11-14Rename incorrectly named (dst, src) arguments in DeliverNetworkPacket prototypeBert Muthalaly
...to (remote, local), reflecting the (correct) names in the implementation of DeliverNetworkPacket (see tcpip/stack/nic.go). Also trim the names in DeliverNetworkPacket and elsewhere to avoid stuttering; since the type is tcpip.LinkAddress, there's no need to include "LinkAddr" in the parameter names. Note that every callsite passes arguments in the order (src, dst). PiperOrigin-RevId: 221514396 Change-Id: I3637454ad0d6e62a19e4dcbc2a16493798bd0f09
2018-11-14Clean up tcp.sendDataIan Gudger
PiperOrigin-RevId: 221484739 Change-Id: I44c71f79f99d0d00a2e70a7f06d7024a62a5de0a
2018-11-13Implement TCP_NODELAY and TCP_CORKIan Gudger
Previously, TCP_NODELAY was always enabled and we would lie about it being configurable. TCP_NODELAY is now disabled by default (to match Linux) in the socket layer so that non-gVisor users don't automatically start using this questionable optimization. PiperOrigin-RevId: 221368472 Change-Id: Ib0240f66d94455081f4e0ca94f09d9338b2c1356
2018-11-12Remove obsolete TODOIan Gudger
PiperOrigin-RevId: 221117846 Change-Id: I2a43fd8135b1d1194ff81e98644ce6b6182ece50
2018-11-09Add an implementation of a SACK scoreboard as per RFC6675.Bhasker Hariharan
PiperOrigin-RevId: 220866996 Change-Id: I89d48215df57c00d6a6ec512fc18712a2ea9080b
2018-11-07Fix flaky TestCacheResolutionTimeoutFabricio Voznika
Increase timeout to prevent the entry from being found when there is delay on the address resolution goroutine that doesn't mark the request as failed. PiperOrigin-RevId: 220504789 Change-Id: I7e44fd95d8624bd69962f862fbf5517a81395f2a
2018-11-06Internal change.Googler
PiperOrigin-RevId: 220314735 Change-Id: Ic519567e43f6caf042b9f223e517da40640b7d38
2018-11-05Merge segments in sender's writeListIan Gudger
PiperOrigin-RevId: 220185891 Change-Id: Iaea73fd7b2fa8c399b989cdcaabf4885f370df4b
2018-10-31Fix a race where keepalives could be sent while there is pending dataIan Gudger
PiperOrigin-RevId: 219571556 Change-Id: I5a1042c1cb05eb2711eb01627fd298bad6c543a6
2018-10-31Use syserr style error translation in netstack's rawfileIan Gudger
Replacing map lookups with slice indexing is higher performance. PiperOrigin-RevId: 219569901 Change-Id: I9b7cd22abd4b95383025edbd5a80d1c1a4496936
2018-10-31Remove ipv4.endpoint.addressTamir Duberstein
This field was added in the intial implementation, before Route existed to pass the local and remote addresses to the packet-writing path. Today, the Route's members should be respected. A similar bug was previously fixed in 214650822. PiperOrigin-RevId: 219474095 Change-Id: Id2a8ee4421d2841c8d88ccb3c193c455086350ee
2018-10-24Mark netstack/tcpip/transport/tcp:tcp_test flakyFabricio Voznika
PiperOrigin-RevId: 218537640 Change-Id: I1c5f55a46390174e1f5caeff74b1a364fa3268d9
2018-10-23Remove blanket TODO, as it is self-evident.Adin Scannell
PiperOrigin-RevId: 218390517 Change-Id: Ic891c1626e62a6c4ed57f8180740872bcd1be177
2018-10-23Simplify channel managementTamir Duberstein
The channels {cancel,resCh} have roughly the same lifetime and are used for roughly the same purpose as an entry's waiters; we can unify the state management of the two mechanisms, while also reducing unncessary mutex locking and unlocking. Made some cosmetic changes while I'm here. PiperOrigin-RevId: 218343915 Change-Id: Ic69546a2b7b390162b2231f07f335dd6199472d7
2018-10-23Track paths and provide a rename hook.Adin Scannell
This change also adds extensive testing to the p9 package via mocks. The sanity checks and type checks are moved from the gofer into the core package, where they can be more easily validated. PiperOrigin-RevId: 218296768 Change-Id: I4fc3c326e7bf1e0e140a454cbacbcc6fd617ab55
2018-10-19Use correct company name in copyright headerIan Gudger
PiperOrigin-RevId: 217951017 Change-Id: Ie08bf6987f98467d07457bcf35b5f1ff6e43c035
2018-10-17Move Unix transport out of netstackIan Gudger
PiperOrigin-RevId: 217557656 Change-Id: I63d27635b1a6c12877279995d2d9847b6a19da9b
2018-10-15Refactor host.ConnectedEndpointIan Gudger
* Integrate recvMsg and sendMsg functions into Recv and Send respectively as they are no longer shared. * Clean up partial read/write error handling code. * Re-order code to make sense given that there is no longer a host.endpoint type. PiperOrigin-RevId: 217255072 Change-Id: Ib43fe9286452f813b8309d969be11f5fa40694cd
2018-10-15Merge host.endpoint into host.ConnectedEndpointIan Gudger
host.endpoint contained duplicated logic from the sockerpair implementation and host.ConnectedEndpoint. Remove host.endpoint in favor of a host.ConnectedEndpoint wrapped in a socketpair end. PiperOrigin-RevId: 217240096 Change-Id: I4a3d51e3fe82bdf30e2d0152458b8499ab4c987c
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