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* conn, device, tun: implement vectorized I/O plumbingJordan Whited2023-03-101-11/+18
| | | | | | | | | | | | | | | | | | | | Accept packet vectors for reading and writing in the tun.Device and conn.Bind interfaces, so that the internal plumbing between these interfaces now passes a vector of packets. Vectors move untouched between these interfaces, i.e. if 128 packets are received from conn.Bind.Read(), 128 packets are passed to tun.Device.Write(). There is no internal buffering. Currently, existing implementations are only adjusted to have vectors of length one. Subsequent patches will improve that. Also, as a related fixup, use the unix and windows packages rather than the syscall package when possible. Co-authored-by: James Tucker <james@tailscale.com> Signed-off-by: James Tucker <james@tailscale.com> Signed-off-by: Jordan Whited <jordan@tailscale.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* tun: guard Device.Events() against chan writesJordan Whited2023-02-091-4/+4
| | | | | Signed-off-by: Jordan Whited <jordan@tailscale.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* global: bump copyright yearJason A. Donenfeld2023-02-071-1/+1
| | | | Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* global: bump copyright yearJason A. Donenfeld2022-09-201-1/+1
| | | | Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* all: update to Go 1.18Josh Bleecher Snyder2022-03-161-1/+1
| | | | | | | | | | Bump go.mod and README. Switch to upstream net/netip. Use strings.Cut. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
* global: use netip where possible nowJason A. Donenfeld2021-11-231-5/+5
| | | | | | | | There are more places where we'll need to add it later, when Go 1.18 comes out with support for it in the "net" package. Also, allowedips still uses slices internally, which might be suboptimal. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* global: remove TODO name graffitiJason A. Donenfeld2021-02-231-2/+2
| | | | | | | | | | Googlers have a habit of graffiting their name in TODO items that then are never addressed, and other people won't go near those because they're marked territory of another animal. I've been gradually cleaning these up as I see them, but this commit just goes all the way and removes the remaining stragglers. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* device: test up/down using virtual connJason A. Donenfeld2021-02-231-1/+0
| | | | | | This prevents port clashing bugs. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* global: bump copyrightJason A. Donenfeld2021-01-281-1/+1
| | | | Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* tun/tuntest: make genICMPv4 allocate lessJosh Bleecher Snyder2021-01-071-8/+7
| | | | | | | It doesn't really matter, because it is only used in tests, but it does remove some noise from pprof profiles. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
* global: update header comments and modulesJason A. Donenfeld2020-05-021-1/+1
| | | | Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* tuntest: split out testing packageDavid Crawshaw2020-05-021-0/+150
This code is useful to other packages writing tests. Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
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