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PacketBuffers are analogous to Linux's sk_buff. They hold all information about
a packet, headers, and payload. This is important for:
* iptables to access various headers of packets
* Preventing the clutter of passing different net and link headers along with
VectorisedViews to packet handling functions.
This change only affects the incoming packet path, and a future change will
change the outgoing path.
Benchmark Regular PacketBufferPtr PacketBufferConcrete
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BM_Recvmsg 400.715MB/s 373.676MB/s 396.276MB/s
BM_Sendmsg 361.832MB/s 333.003MB/s 335.571MB/s
BM_Recvfrom 453.336MB/s 393.321MB/s 381.650MB/s
BM_Sendto 378.052MB/s 372.134MB/s 341.342MB/s
BM_SendmsgTCP/0/1k 353.711MB/s 316.216MB/s 322.747MB/s
BM_SendmsgTCP/0/2k 600.681MB/s 588.776MB/s 565.050MB/s
BM_SendmsgTCP/0/4k 995.301MB/s 888.808MB/s 941.888MB/s
BM_SendmsgTCP/0/8k 1.517GB/s 1.274GB/s 1.345GB/s
BM_SendmsgTCP/0/16k 1.872GB/s 1.586GB/s 1.698GB/s
BM_SendmsgTCP/0/32k 1.017GB/s 1.020GB/s 1.133GB/s
BM_SendmsgTCP/0/64k 475.626MB/s 584.587MB/s 627.027MB/s
BM_SendmsgTCP/0/128k 416.371MB/s 503.434MB/s 409.850MB/s
BM_SendmsgTCP/0/256k 323.449MB/s 449.599MB/s 388.852MB/s
BM_SendmsgTCP/0/512k 243.992MB/s 267.676MB/s 314.474MB/s
BM_SendmsgTCP/0/1M 95.138MB/s 95.874MB/s 95.417MB/s
BM_SendmsgTCP/0/2M 96.261MB/s 94.977MB/s 96.005MB/s
BM_SendmsgTCP/0/4M 96.512MB/s 95.978MB/s 95.370MB/s
BM_SendmsgTCP/0/8M 95.603MB/s 95.541MB/s 94.935MB/s
BM_SendmsgTCP/0/16M 94.598MB/s 94.696MB/s 94.521MB/s
BM_SendmsgTCP/0/32M 94.006MB/s 94.671MB/s 94.768MB/s
BM_SendmsgTCP/0/64M 94.133MB/s 94.333MB/s 94.746MB/s
BM_SendmsgTCP/0/128M 93.615MB/s 93.497MB/s 93.573MB/s
BM_SendmsgTCP/0/256M 93.241MB/s 95.100MB/s 93.272MB/s
BM_SendmsgTCP/1/1k 303.644MB/s 316.074MB/s 308.430MB/s
BM_SendmsgTCP/1/2k 537.093MB/s 584.962MB/s 529.020MB/s
BM_SendmsgTCP/1/4k 882.362MB/s 939.087MB/s 892.285MB/s
BM_SendmsgTCP/1/8k 1.272GB/s 1.394GB/s 1.296GB/s
BM_SendmsgTCP/1/16k 1.802GB/s 2.019GB/s 1.830GB/s
BM_SendmsgTCP/1/32k 2.084GB/s 2.173GB/s 2.156GB/s
BM_SendmsgTCP/1/64k 2.515GB/s 2.463GB/s 2.473GB/s
BM_SendmsgTCP/1/128k 2.811GB/s 3.004GB/s 2.946GB/s
BM_SendmsgTCP/1/256k 3.008GB/s 3.159GB/s 3.171GB/s
BM_SendmsgTCP/1/512k 2.980GB/s 3.150GB/s 3.126GB/s
BM_SendmsgTCP/1/1M 2.165GB/s 2.233GB/s 2.163GB/s
BM_SendmsgTCP/1/2M 2.370GB/s 2.219GB/s 2.453GB/s
BM_SendmsgTCP/1/4M 2.005GB/s 2.091GB/s 2.214GB/s
BM_SendmsgTCP/1/8M 2.111GB/s 2.013GB/s 2.109GB/s
BM_SendmsgTCP/1/16M 1.902GB/s 1.868GB/s 1.897GB/s
BM_SendmsgTCP/1/32M 1.655GB/s 1.665GB/s 1.635GB/s
BM_SendmsgTCP/1/64M 1.575GB/s 1.547GB/s 1.575GB/s
BM_SendmsgTCP/1/128M 1.524GB/s 1.584GB/s 1.580GB/s
BM_SendmsgTCP/1/256M 1.579GB/s 1.607GB/s 1.593GB/s
PiperOrigin-RevId: 278940079
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This change makes it so that NDP work is done using the per-interface NDP
configurations instead of the stack-wide default NDP configurations to correctly
implement RFC 4861 section 6.3.2 (note here, a host is a single NIC operating
as a host device), and RFC 4862 section 5.1.
Test: Test that we can set NDP configurations on a per-interface basis without
affecting the configurations of other interfaces or the stack-wide default. Also
make sure that after the configurations are updated, the updated configurations
are used for NDP processes (e.g. Duplicate Address Detection).
PiperOrigin-RevId: 276525661
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This change introduces a new interface, stack.NDPDispatcher. It can be
implemented by the netstack integrator to receive NDP related events. As of this
change, only DAD related events are supported.
Tests: Existing tests were modified to use the NDPDispatcher's DAD events for
DAD tests where it needed to wait for DAD completing (failing and resolving).
PiperOrigin-RevId: 276338733
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This change adds support for optionally auto-generating an IPv6 link-local
address based on the NIC's MAC Address on NIC enable.
Note, this change will not break existing uses of netstack as the default
configuration for the stack options is set in such a way that a link-local
address will not be auto-generated unless the stack is explicitly configured.
See `stack.Options` for more details. Specifically, see
`stack.Options.AutoGenIPv6LinkLocal`.
Tests: Tests to make sure that the IPb6 link-local address is only
auto-generated if the stack is specifically configured to do so. Also tests to
make sure that an auto-generated address goes through the DAD process.
PiperOrigin-RevId: 276059813
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NDP Neighbor Solicitations sent during Duplicate Address Detection must have an
IP hop limit of 255, as all NDP Neighbor Solicitations should have.
Test: Test that DAD messages have the IPv6 hop limit field set to 255.
PiperOrigin-RevId: 275321680
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This change adds support for Duplicate Address Detection on IPv6 addresses
as defined by RFC 4862 section 5.4.
Note, this change will not break existing uses of netstack as the default
configuration for the stack options is set in such a way that DAD will not be
performed. See `stack.Options` and `stack.NDPConfigurations` for more details.
Tests: Tests to make sure that the DAD process properly resolves or fails.
That is, tests make sure that DAD resolves only if:
- No other node is performing DAD for the same address
- No other node owns the same address
PiperOrigin-RevId: 275189471
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