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PiperOrigin-RevId: 242704699
Change-Id: I87db368ca343b3b4bf4f969b17d3aa4ce2f8bd4f
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PiperOrigin-RevId: 240848882
Change-Id: I23dd4599f073263437aeab357c3f767e1a432b82
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IP_MULTICAST_LOOP controls whether or not multicast packets sent on the default
route are looped back. In order to implement this switch, support for sending
and looping back multicast packets on the default route had to be implemented.
For now we only support IPv4 multicast.
PiperOrigin-RevId: 237534603
Change-Id: I490ac7ff8e8ebef417c7eb049a919c29d156ac1c
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PiperOrigin-RevId: 236945145
Change-Id: I051760d95154ea5574c8bb6aea526f488af5e07b
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PiperOrigin-RevId: 236926132
Change-Id: I5cf103f22766e6e65a581de780c7bb9ca0fa3181
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This change adds support for the SO_BROADCAST socket option in gVisor Netstack.
This support includes getsockopt()/setsockopt() functionality for both UDP and
TCP endpoints (the latter being a NOOP), dispatching broadcast messages up and
down the stack, and route finding/creation for broadcast packets. Finally, a
suite of tests have been implemented, exercising this functionality through the
Linux syscall API.
PiperOrigin-RevId: 234850781
Change-Id: If3e666666917d39f55083741c78314a06defb26c
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This allows setting a default send interface for IPv4 multicast. IPv6 support
will come later.
PiperOrigin-RevId: 234251379
Change-Id: I65922341cd8b8880f690fae3eeb7ddfa47c8c173
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SO_TIMESTAMP is reimplemented in ping and UDP sockets (and needs to be added for
TCP), but can just be implemented in epsocket for simplicity. This will also
make SIOCGSTAMP easier to implement.
PiperOrigin-RevId: 234179300
Change-Id: Ib5ea0b1261dc218c1a8b15a65775de0050fe3230
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This enables formatting tcpip.Stats readably with %+v.
PiperOrigin-RevId: 228379088
Change-Id: I6a9876454a22f151ee752cf94589b4188729458f
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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
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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
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PiperOrigin-RevId: 224696233
Change-Id: I45c425d9e32adee5dcce29ca7439a06567b26014
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* 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
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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
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PiperOrigin-RevId: 217951017
Change-Id: Ie08bf6987f98467d07457bcf35b5f1ff6e43c035
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PiperOrigin-RevId: 216770391
Change-Id: Idcdc28b2fe9e1b0b63b8119d445f05a8bcbce81e
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Currently, in the face of FileMem fragmentation and a large sendmsg or
recvmsg call, host sockets may pass > 1024 iovecs to the host, which
will immediately cause the host to return EMSGSIZE.
When we detect this case, use a single intermediate buffer to pass to
the kernel, copying to/from the src/dst buffer.
To avoid creating unbounded intermediate buffers, enforce message size
checks and truncation w.r.t. the send buffer size. The same
functionality is added to netstack unix sockets for feature parity.
PiperOrigin-RevId: 216590198
Change-Id: I719a32e71c7b1098d5097f35e6daf7dd5190eff7
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PiperOrigin-RevId: 214975659
Change-Id: I7bd31a2c54f03ff52203109da312e4206701c44c
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Previously, if address resolution for UDP or Ping sockets required sending
packets using Write in Transport layer, Resolve would return ErrWouldBlock
and Write would return ErrNoLinkAddress. Meanwhile startAddressResolution
would run in background. Further calls to Write using same address would also
return ErrNoLinkAddress until resolution has been completed successfully.
Since Write is not allowed to block and System Calls need to be
interruptible in System Call layer, the caller to Write is responsible for
blocking upon return of ErrWouldBlock.
Now, when startAddressResolution is called a notification channel for
the completion of the address resolution is returned.
The channel will traverse up to the calling function of Write as well as
ErrNoLinkAddress. Once address resolution is complete (success or not) the
channel is closed. The caller would call Write again to send packets and
check if address resolution was compeleted successfully or not.
Fixes google/gvisor#5
Change-Id: Idafaf31982bee1915ca084da39ae7bd468cebd93
PiperOrigin-RevId: 214962200
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PiperOrigin-RevId: 214039349
Change-Id: Ia7d09c5f85eddd1e5634f3c21b0bd60b10be6bd2
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PiperOrigin-RevId: 214023383
Change-Id: I5a7572f949840fb68a3ffb7342e6a3524bd00864
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Netstack needs to be portable, so this seems to be preferable to using raw
system calls.
PiperOrigin-RevId: 212917409
Change-Id: I7b2073e7db4b4bf75300717ca23aea4c15be944c
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PiperOrigin-RevId: 212750821
Change-Id: I822fd63e48c684b45fd91f9ce057867b7eceb792
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PiperOrigin-RevId: 211670620
Change-Id: Ia8a3d8ae53a7fece1dee08ee9c74964bd7f71bb7
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PiperOrigin-RevId: 211504634
Change-Id: I9a7bcbbdd40e5036894930f709278725ef477293
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PiperOrigin-RevId: 210442599
Change-Id: I9498351f461dc69c77b7f815d526c5693bec8e4a
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PiperOrigin-RevId: 209943212
Change-Id: I96dcbc7c2ab2426e510b94a564436505256c5c79
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PiperOrigin-RevId: 209060862
Change-Id: I2cd02f0032b80d0087110095548b1a8ffa696ac2
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PiperOrigin-RevId: 207125440
Change-Id: I6c572afb4d693ee72a0c458a988b0e96d191cd49
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PiperOrigin-RevId: 207037226
Change-Id: I8b5f1a056d4f3eab17846f2e0193bb737ecb5428
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PiperOrigin-RevId: 207007153
Change-Id: Ifedf1cc3758dc18be16647a4ece9c840c1c636c9
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PiperOrigin-RevId: 203958972
Change-Id: Ia6fe16547539296d48e2c6731edacdd96bd6e93c
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Fixes #27
PiperOrigin-RevId: 203825288
Change-Id: Ie9f3a2b2c1e296b026b024f75c07da1a7e118633
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PiperOrigin-RevId: 202151720
Change-Id: I0491172c436bbb32b977f557953ba0bc41cfe299
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PiperOrigin-RevId: 201596247
Change-Id: Id22f47b2cdcbe14aa0d930f7807ba75f91a56724
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So that when saving TCP endpoint in these states, there is no pending or
background activities.
Also lift tcp network save rejection error to tcpip package.
PiperOrigin-RevId: 199370748
Change-Id: Ief7b45c2a7338d12414cd7c23db95de6a9c22700
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PiperOrigin-RevId: 198457660
Change-Id: I6ea5cf0b4cfe2b5ba455325a7e5299880e5a088a
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Previously, dual stack UDP sockets bound to an IPv4 address could not use
sendto to communicate with IPv4 addresses. Further, dual stack UDP sockets
bound to an IPv6 address could use sendto to communicate with IPv4 addresses.
Neither of these behaviors are consistent with Linux.
PiperOrigin-RevId: 197036024
Change-Id: Ic3713efc569f26196e35bb41e6ad63f23675fc90
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So that when saving TCP endpoint in these states, there is no pending or
background activities.
Also lift tcp network save rejection error to tcpip package.
PiperOrigin-RevId: 196886839
Change-Id: I0fe73750f2743ec7e62d139eb2cec758c5dd6698
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PiperOrigin-RevId: 196325647
Change-Id: I850eb4a29b9c679da4db10eb164bbdf967690663
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PiperOrigin-RevId: 195047018
Change-Id: I6d99528a00a2125f414e1e51e067205289ec9d3d
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PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463
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