Currently expired IP fragments are discarded only if another fragment for the
same IP datagram is received after timeout or the total size of the fragment
queue exceeded a predefined value.
Test: fragmentation.TestReassemblingTimeout
Fixes#3960
PiperOrigin-RevId: 334423710
As per RFC 8200 Section 4.5:
The Next Header field of the last header of the Per-Fragment
headers is obtained from the Next Header field of the first
fragment's Fragment header.
Test:
- pkg/tcpip/network/ipv6:ipv6_test
- pkg/tcpip/network/ipv4:ipv4_test
- pkg/tcpip/network/fragmentation:fragmentation_test
Updates #2197
PiperOrigin-RevId: 327671635
Prevent fragments with different source-destination pairs from
conflicting with each other.
Test:
- ipv6_test.TestReceiveIPv6Fragments
- ipv4_test.TestReceiveIPv6Fragments
PiperOrigin-RevId: 324283246
Allow configuring fragmentation.Fragmentation with a fragment
block size which will be enforced when processing fragments. Also
validate arguments when processing fragments.
Test:
- fragmentation.TestErrors
- ipv6_test.TestReceiveIPv6Fragments
- ipv4_test.TestReceiveIPv6Fragments
PiperOrigin-RevId: 324081521
Netstack has traditionally parsed headers on-demand as a packet moves up the
stack. This is conceptually simple and convenient, but incompatible with
iptables, where headers can be inspected and mangled before even a routing
decision is made.
This changes header parsing to happen early in the incoming packet path, as soon
as the NIC gets the packet from a link endpoint. Even if an invalid packet is
found (e.g. a TCP header of insufficient length), the packet is passed up the
stack for proper stats bookkeeping.
PiperOrigin-RevId: 315179302
When list elements are removed from a list but not discarded, it becomes
important to invalidate the references they hold to their former
neighbors to prevent memory leaks.
PiperOrigin-RevId: 299412421
* Rename syncutil to sync.
* Add aliases to sync types.
* Replace existing usage of standard library sync package.
This will make it easier to swap out synchronization primitives. For example,
this will allow us to use primitives from github.com/sasha-s/go-deadlock to
check for lock ordering violations.
Updates #1472
PiperOrigin-RevId: 289033387
Reassembly can fail due to an invalid sequence of fragments
being received. eg. Multiple fragments with same id which
claim to be the last one by setting the more flag to 0 etc.
It's safer to just drop the reassembler and increment a metric
than to panic when reassembly fails.
PiperOrigin-RevId: 274920901
Addresses obvious typos, in the documentation only.
COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/443 from Pixep:fix/documentation-spelling 4d0688164eafaf0b3010e5f4824b35d1e7176d65
PiperOrigin-RevId: 255477779
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
Toshi Kikuchi
Arthur Sfez
Ghanan Gowripalan
Kevin Krakauer
Tamir Duberstein
Ian Gudger
Bhasker Hariharan
Michael Pratt
Adin Scannell
Nicolas Lacasse
Googler