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path: root/pkg/tcpip/link/fdbased/endpoint.go
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2019-05-21Refactor fdbased endpoint dispatcher code.Bhasker Hariharan
This is in preparation to support an fdbased endpoint that can read/dispatch packets from multiple underlying fds. Updates #231 PiperOrigin-RevId: 249337074 Change-Id: Id7d375186cffcf55ae5e38986e7d605a96916d35
2019-04-29Change copyright notice to "The gVisor Authors"Michael Pratt
Based on the guidelines at https://opensource.google.com/docs/releasing/authors/. 1. $ rg -l "Google LLC" | xargs sed -i 's/Google LLC.*/The gVisor Authors./' 2. Manual fixup of "Google Inc" references. 3. Add AUTHORS file. Authors may request to be added to this file. 4. Point netstack AUTHORS to gVisor AUTHORS. Drop CONTRIBUTORS. Fixes #209 PiperOrigin-RevId: 245823212 Change-Id: I64530b24ad021a7d683137459cafc510f5ee1de9
2019-04-26Bump the AF_PACKET socket rcv buf size to 4MB by default.Bhasker Hariharan
Packet socket receive buffers default to the sysctl value of net.core.rmem_default and are capped by net.core.rmem_max both which are usually set to 208KB on most systems. Since we can't expect every gVisor user to bump these we use SO_RCVBUFFORCE to exceed the limit. This is possible as runsc runs with CAP_NET_ADMIN outside the sandbox and can do this before the FD is passed to the sentry inside the sandbox. Updates #211 iperf output w/ 4MB buffer. iperf3 -c 172.17.0.2 -t 100 Connecting to host 172.17.0.2, port 5201 [ 4] local 172.17.0.1 port 40378 connected to 172.17.0.2 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.02 MBytes [ 4] 1.00-2.00 sec 1.18 GBytes 10.2 Gbits/sec 0 1.02 MBytes [ 4] 2.00-3.00 sec 965 MBytes 8.09 Gbits/sec 0 1.02 MBytes [ 4] 3.00-4.00 sec 942 MBytes 7.90 Gbits/sec 0 1.02 MBytes [ 4] 4.00-5.00 sec 952 MBytes 7.99 Gbits/sec 0 1.02 MBytes [ 4] 5.00-6.00 sec 1.14 GBytes 9.81 Gbits/sec 0 1.02 MBytes [ 4] 6.00-7.00 sec 1.13 GBytes 9.68 Gbits/sec 0 1.02 MBytes [ 4] 7.00-8.00 sec 930 MBytes 7.80 Gbits/sec 0 1.02 MBytes [ 4] 8.00-9.00 sec 1.15 GBytes 9.91 Gbits/sec 0 1.02 MBytes [ 4] 9.00-10.00 sec 938 MBytes 7.87 Gbits/sec 0 1.02 MBytes [ 4] 10.00-11.00 sec 737 MBytes 6.18 Gbits/sec 0 1.02 MBytes [ 4] 11.00-12.00 sec 1.16 GBytes 9.93 Gbits/sec 0 1.02 MBytes [ 4] 12.00-13.00 sec 917 MBytes 7.69 Gbits/sec 0 1.02 MBytes [ 4] 13.00-14.00 sec 1.19 GBytes 10.2 Gbits/sec 0 1.02 MBytes [ 4] 14.00-15.00 sec 1.01 GBytes 8.70 Gbits/sec 0 1.02 MBytes [ 4] 15.00-16.00 sec 1.20 GBytes 10.3 Gbits/sec 0 1.02 MBytes [ 4] 16.00-17.00 sec 1.14 GBytes 9.80 Gbits/sec 0 1.02 MBytes ^C[ 4] 17.00-17.60 sec 718 MBytes 10.1 Gbits/sec 0 1.02 MBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-17.60 sec 18.4 GBytes 8.98 Gbits/sec 0 sender [ 4] 0.00-17.60 sec 0.00 Bytes 0.00 bits/sec receiver PiperOrigin-RevId: 245470590 Change-Id: I1c08c5ee8345de6ac070513656a4703312dc3c00
2019-04-17Return error from fdbased.NewFabricio Voznika
RELNOTES: n/a PiperOrigin-RevId: 244031742 Change-Id: Id0cdb73194018fb5979e67b58510ead19b5a2b81
2019-04-09Add TCP checksum verification.Bhasker Hariharan
PiperOrigin-RevId: 242704699 Change-Id: I87db368ca343b3b4bf4f969b17d3aa4ce2f8bd4f
2019-03-28netstack/fdbased: add generic segmentation offload (GSO) supportAndrei Vagin
The linux packet socket can handle GSO packets, so we can segment packets to 64K instead of the MTU which is usually 1500. Here are numbers for the nginx-1m test: runsc: 579330.01 [Kbytes/sec] received runsc-gso: 1794121.66 [Kbytes/sec] received runc: 2122139.06 [Kbytes/sec] received and for tcp_benchmark: $ tcp_benchmark --duration 15 --ideal [ 4] 0.0-15.0 sec 86647 MBytes 48456 Mbits/sec $ tcp_benchmark --client --duration 15 --ideal [ 4] 0.0-15.0 sec 2173 MBytes 1214 Mbits/sec $ tcp_benchmark --client --duration 15 --ideal --gso 65536 [ 4] 0.0-15.0 sec 19357 MBytes 10825 Mbits/sec PiperOrigin-RevId: 240809103 Change-Id: I2637f104db28b5d4c64e1e766c610162a195775a
2019-03-12Make HandleLocal apply to all non-loopback interfaces.Ian Gudger
HandleLocal is very similar conceptually to MULTICAST_LOOP, so we can unify the implementations. This has the benefit of making HandleLocal apply even when the fdbased link endpoint isn't in use. In addition, move looping logic to route creation so that it doesn't need to be run for each packet. This should improve performance. PiperOrigin-RevId: 238099480 Change-Id: I72839f16f25310471453bc9d3fb8544815b25c23
2019-02-26Adds a WriteRawPacket method to the InjectableLinkEndpoint interface.Googler
Also exposes ipv4.MaxTotalSize since it is a generally useful constant. PiperOrigin-RevId: 235799755 Change-Id: I1fa8d5294bf355acf5527cfdf274b3687d3c8b13
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
2019-01-29Use 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
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
2018-10-19Use correct company name in copyright headerIan Gudger
PiperOrigin-RevId: 217951017 Change-Id: Ie08bf6987f98467d07457bcf35b5f1ff6e43c035
2018-09-19Pass local link address to DeliverNetworkPacketBert Muthalaly
This allows a NetworkDispatcher to implement transparent bridging, assuming all implementations of LinkEndpoint.WritePacket call eth.Encode with header.EthernetFields.SrcAddr set to the passed Route.LocalLinkAddress, if it is provided. PiperOrigin-RevId: 213686651 Change-Id: I446a4ac070970202f0724ef796ff1056ae4dd72a
2018-09-14Remove buffer.Prependable.UsedBytesTamir Duberstein
It is the same as buffer.Prependable.View. PiperOrigin-RevId: 213064166 Change-Id: Ib33b8a2c4da864209d9a0be0a1c113be10b520d3
2018-09-14Pass buffer.Prependable by valueTamir Duberstein
PiperOrigin-RevId: 213053370 Change-Id: I60ea89572b4fca53fd126c870fcbde74fcf52562
2018-09-12Always pass buffer.VectorisedView by valueTamir Duberstein
PiperOrigin-RevId: 212757571 Change-Id: I04200df9e45c21eb64951cd2802532fa84afcb1a
2018-09-05Update {LinkEndpoint,NetworkEndpoint}#WritePacket to take a VectorisedViewBert Muthalaly
Makes it possible to avoid copying or allocating in cases where DeliverNetworkPacket (rx) needs to turn around and call WritePacket (tx) with its VectorisedView. Also removes the restriction on having VectorisedViews with multiple views in the write path. PiperOrigin-RevId: 211728717 Change-Id: Ie03a65ecb4e28bd15ebdb9c69f05eced18fdfcff
2018-08-22Allow building on !linuxGoogler
PiperOrigin-RevId: 209819644 Change-Id: I329d054bf8f4999e7db0dcd95b13f7793c65d4e2
2018-08-08Resend packets back to netstack if destined to itselfFabricio Voznika
Add option to redirect packet back to netstack if it's destined to itself. This fixes the problem where connecting to the local NIC address would not work, e.g.: echo bar | nc -l -p 8080 & echo foo | nc 192.168.0.2 8080 PiperOrigin-RevId: 207995083 Change-Id: I17adc2a04df48bfea711011a5df206326a1fb8ef
2018-07-30netstack: support disconnect-on-save option per fdbased link.Zhaozhong Ni
PiperOrigin-RevId: 206659972 Change-Id: I5e0e035f97743b6525ad36bed2c802791609beaf
2018-07-17netstack: update goroutine save / restore safety comments.Zhaozhong Ni
PiperOrigin-RevId: 204930314 Change-Id: Ifc4c41ed28616cd57fafbf7c92e87141a945c41f
2018-07-11Automated rollback of changelist 203157739Bhasker Hariharan
PiperOrigin-RevId: 204196916 Change-Id: If632750fc6368acb835e22cfcee0ae55c8a04d16
2018-07-09Switch netstack licenses to Apache 2.0.Nicolas Lacasse
Fixes #27 PiperOrigin-RevId: 203825288 Change-Id: Ie9f3a2b2c1e296b026b024f75c07da1a7e118633
2018-07-03Resend packets back to netstack if destined to itselfFabricio Voznika
Add option to redirect packet back to netstack if it's destined to itself. This fixes the problem where connecting to the local NIC address would not work, e.g.: echo bar | nc -l -p 8080 & echo foo | nc 192.168.0.2 8080 PiperOrigin-RevId: 203157739 Change-Id: I31c9f7c501e3f55007f25e1852c27893a16ac6c4
2018-05-22sentry: Add simple SIOCGIFFLAGS support (IFF_RUNNING and IFF_PROMIS).Kevin Krakauer
Establishes a way of communicating interface flags between netstack and epsocket. More flags can be added over time. PiperOrigin-RevId: 197616669 Change-Id: I230448c5fb5b7d2e8d69b41a451eb4e1096a0e30
2018-04-28Check in gVisor.Googler
PiperOrigin-RevId: 194583126 Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463
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