Fix RST generation bugs.

There are a few cases addressed by this change

- We no longer generate a RST in response to a RST packet.

- When we receive a RST we cleanup and release all reservations immediately as
  the connection is now aborted.

- An ACK received by a listening socket generates a RST when SYN cookies are not
  in-use. The only reason an ACK should land at the listening socket is if we
  are using SYN cookies otherwise the goroutine for the handshake in progress
  should have gotten the packet and it should never have arrived at the
  listening endpoint.

- Also fixes the error returned when a connection times out due to a
  Keepalive timer expiration from ECONNRESET to a ETIMEDOUT.

PiperOrigin-RevId: 267238427
3 files changed
tree: 996701b875af02330ebb01ef908d561d22b86bd2
  1. gate/
  2. ilist/
  3. rand/
  4. sleep/
  5. tcpip/
  6. tmutex/
  7. waiter/
  8. AUTHORS
  9. CONTRIBUTING.md
  10. LICENSE
  11. README.md
README.md

Netstack

Netstack is a network stack written in Go.

Getting started

Try it out on Linux by installing the tun_tcp_echo demo:

go install github.com/google/netstack/tcpip/sample/tun_tcp_echo

Create a TUN device with:

[sudo] ip tuntap add user <username> mode tun <device-name>
[sudo] ip link set <device-name> up
[sudo] ip addr add <ipv4-address>/<mask-length> dev <device-name>

Then run with:

tun_tcp_echo <device-name> <ipv4-address> <port>

Contributions

Please see CONTRIBUTING.md for more details.

Issues/Bug Reports

Netstack is primarily developed as part of gVisor and any issues/bugs should be filed against the gVisor repository as this repo is not actively monitored for bug reports.

Disclaimer

This is not an official Google product (experimental or otherwise), it is just code that happens to be owned by Google.