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2021-11-09Merge release-20211101.0-27-g3f5cfe694 (automated)gogVisor bot
2021-11-09Remove Stack.NewJobTamir Duberstein
Use the static method instead; these methods encourage callers to retain a pointer to the entire stack rather than only its clock which they require. PiperOrigin-RevId: 408651956
2021-11-08Merge release-20211101.0-26-g84b38f4c6 (automated)gVisor bot
2021-11-08Add reference counting to packet buffers.Lucas Manning
PiperOrigin-RevId: 408426639
2021-10-27Record counts of packets with unknown L3/L4 numbersNick Brown
Previously, we recorded a single aggregated count. These per-protocol counts can help us debug field issues when frames are dropped for this reason. PiperOrigin-RevId: 405913911
2021-10-26Merge release-20211019.0-43-gf54a25c1f (automated)gVisor bot
2021-10-26Validate an icmp header before accessing itAndrei Vagin
A header can't be smaller than header.ICMPv4MinimumSize. Reported-by: syzbot+57b68b14b4f6a58bf985@syzkaller.appspotmail.com PiperOrigin-RevId: 405748438
2021-10-20Merge release-20211011.0-36-gbdf4e41c8 (automated)gVisor bot
2021-10-19Always parse Transport headersGhanan Gowripalan
..including ICMP headers before delivering them to the TransportDispatcher. Updates #3810. PiperOrigin-RevId: 404404002
2021-10-13Merge release-20210927.0-67-g747cb9246 (automated)gVisor bot
2021-10-12Support Twice NATGhanan Gowripalan
This CL allows both SNAT and DNAT targets to be performed on the same packet. Fixes #5696. PiperOrigin-RevId: 402714738
2021-09-28Merge release-20210921.0-37-ged083bac4 (automated)gVisor bot
2021-09-28Support naive Masquerade NAT targetGhanan Gowripalan
* Does not accept a port range (Issue #5772). * Does not support checking for tuple conflits (Issue #5773). PiperOrigin-RevId: 399524088
2021-09-27Merge release-20210921.0-34-g1fe0a6691 (automated)gVisor bot
2021-09-27Prevent PacketData from being modified.Ayush Ranjan
PacketData should not be modified and should be treated readonly because it represents packet payload. The old DeleteFront method allowed callers to modify the underlying buffer which should not be allowed. Added a way to consume from the PacketData instead of deleting from it. Updated call points to use that instead. Reported-by: syzbot+faee5cb350f769a52d1b@syzkaller.appspotmail.com PiperOrigin-RevId: 399268473
2021-09-23Merge release-20210921.0-20-g8627db006 (automated)gVisor bot
2021-09-23Pass AddressableEndpoint to IPTablesGhanan Gowripalan
...instead of an address. This allows a later change to more precisely select an address based on the NAT type (source vs. destination NAT). PiperOrigin-RevId: 398559901
2021-09-23Merge release-20210921.0-17-gd480289ad (automated)gVisor bot
2021-09-23Introduce method per iptables hookGhanan Gowripalan
...to make it clear what arguments are needed per hook. PiperOrigin-RevId: 398538776
2021-09-22Merge release-20210906.0-59-g586f147cd (automated)gVisor bot
2021-09-22Do not rate limit ICMP Echos by defaultBruno Dal Bo
As per https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt linux does not limit ICMP Echos by default. icmp_ratemask - INTEGER Mask made of ICMP types for which rates are being limited. Significant bits: IHGFEDCBA9876543210 Default mask: 0000001100000011000 (6168) Bit definitions (see include/linux/icmp.h): 0 Echo Reply 3 Destination Unreachable * 4 Source Quench * 5 Redirect 8 Echo Request B Time Exceeded * C Parameter Problem * D Timestamp Request E Timestamp Reply F Info Request G Info Reply H Address Mask Request I Address Mask Reply * These are rate limited by default (see default mask above) Equivalently for ICMPv6. Lay out foundation for ICMP rate masks, exposing that configuration will be addressed later when the need arises (#6521). Fixes #6519 PiperOrigin-RevId: 398337963
2021-09-22Merge release-20210906.0-57-g5768a147b (automated)gVisor bot
2021-09-22Populate forwarded packet buffer's TransportHeaderGhanan Gowripalan
Turns out certain features of iptables (e.g. NAT) will not perform any checks/work unless both the Network and Transport headers are populated. With this change, provide the packet directly to the outgoing network endpoint's `writePacket` method instead of going through `WriteHeaderIncludedPacket` which expected the headers to not be set. PiperOrigin-RevId: 398304004
2021-09-15Merge release-20210906.0-26-g8b56b6b83 (automated)gVisor bot
2021-09-15Pass address properties in a single structTony Gong
Replaced the current AddAddressWithOptions method with AddAddressWithProperties which passes all address properties in a single AddressProperties type. More properties that need to be configured in the future are expected, so adding a type makes adding them easier. PiperOrigin-RevId: 396930729
2021-09-13Merge release-20210906.0-13-ge07fd058e (automated)gVisor bot
2021-09-13Set NICID before delivering packet to raw endpointGhanan Gowripalan
...as raw endpoints expect the packet's NICID to be set. PiperOrigin-RevId: 396446552
2021-07-30Support RTM_DELLINKZeling Feng
This change will allow us to remove the default link in a packetimpact test so we can reduce indeterministic behaviors as required in https://fxbug.dev/78430. This will also help with testing #1388. Updates #578, #1388. PiperOrigin-RevId: 387896847
2021-06-17Merge release-20210607.0-53-g0f5c1f5ea (automated)gVisor bot
2021-06-17raw sockets: don't overwrite destination addressKevin Krakauer
Also makes the behavior of raw sockets WRT fragmentation clearer, and makes the ICMPv4 header-length check explicit. Fixes #3160. PiperOrigin-RevId: 380033450
2021-06-14Merge release-20210607.0-41-g9c7ff24fe (automated)gVisor bot
2021-06-14Cleanup iptables bug TODOsKevin Krakauer
There are many references to unimplemented iptables features that link to #170, but that bug is about Istio support specifically. Istio is supported, so the references should change. Some TODOs are addressed, some removed because they are not features requested by users, and some are left as implementation notes. Fixes #170. PiperOrigin-RevId: 379328488
2021-06-05Merge release-20210518.0-77-g993fff4e1 (automated)gVisor bot
2021-06-05Use the NIC packets arrived at when filteringGhanan Gowripalan
As per https://linux.die.net/man/8/iptables, ``` Parameters -i, --in-interface [!] name Name of an interface via which a packet was received (only for packets entering the INPUT, FORWARD and PREROUTING chains). ``` Before this change, iptables would use the NIC that a packet was delivered to after forwarding a packet locally (when forwarding is enabled) instead of the NIC the packet arrived at. Updates #170, #3549. Test: iptables_test.TestInputHookWithLocalForwarding PiperOrigin-RevId: 377714971
2021-05-28Merge release-20210518.0-62-g30bca3270 (automated)gVisor bot
2021-05-28Clean up warningsTamir Duberstein
- Typos - Unused arguments - Useless conversions PiperOrigin-RevId: 376362730
2021-05-27Use fake clocks in all testsTamir Duberstein
...except TCP tests and NDP tests that mutate globals. These will be undertaken later. Updates #5940. PiperOrigin-RevId: 376145608
2021-05-27Avoid warningsTamir Duberstein
- Don't shadow package name - Don't defer in a loop - Remove unnecessary type conversion PiperOrigin-RevId: 376137822
2021-05-24Standardize import aliasTamir Duberstein
PiperOrigin-RevId: 375507298
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
2021-05-19Merge release-20210510.0-62-gb8b43f70c (automated)gVisor bot
2021-05-19Send ICMP errors when link address resolution failsNick Brown
Before this change, we would silently drop packets when link resolution failed. This change brings us into line with RFC 792 (IPv4) and RFC 4443 (IPv6), both of which specify that gateways should return an ICMP error to the sender when link resolution fails. PiperOrigin-RevId: 374699789
2021-05-17Rename variables in IP forwarding testsNick Brown
Previously, we named domain objects using numbers (e.g. "e1", "e2" etc). This change renames objects to clarify whether they are part of the incoming or outgoing path. PiperOrigin-RevId: 374226859
2021-05-14Merge release-20210510.0-42-g820c77d5e (automated)gVisor bot
2021-05-14Control forwarding per NetworkEndpointGhanan Gowripalan
...instead of per NetworkProtocol to better conform with linux (https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt): ``` conf/interface/* forwarding - BOOLEAN Enable IP forwarding on this interface. This controls whether packets received _on_ this interface can be forwarded. ``` Fixes #5932. PiperOrigin-RevId: 373888000
2021-05-14Merge release-20210510.0-32-g2b457d9ee (automated)gVisor bot
2021-05-13Check filter table when forwarding IP packetsGhanan Gowripalan
This change updates the forwarding path to perform the forwarding hook with iptables so that the filter table is consulted before a packet is forwarded Updates #170. Test: iptables_test.TestForwardingHook PiperOrigin-RevId: 373702359
2021-05-13Rename SetForwarding to SetForwardingDefaultAndAllNICsGhanan Gowripalan
...to make it clear to callers that all interfaces are updated with the forwarding flag and that future NICs will be created with the new forwarding state. PiperOrigin-RevId: 373618435
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