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* conn: windows: add missing return statement in DstToString AF_INETspringhack2023-06-271-1/+1
| | | | | Signed-off-by: SpringHack <springhack@live.cn> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* global: buff -> bufJason A. Donenfeld2023-03-131-6/+6
| | | | | | This always struck me as kind of weird and non-standard. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* conn: inch BatchSize toward being non-dynamicJason A. Donenfeld2023-03-101-0/+2
| | | | | | | | There's not really a use at the moment for making this configurable, and once bind_windows.go behaves like bind_std.go, we'll be able to use constants everywhere. So begin that simplification now. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* conn, device, tun: implement vectorized I/O plumbingJordan Whited2023-03-101-25/+42
| | | | | | | | | | | | | | | | | | | | 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>
* 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: use Go 1.19 and its atomic typesBrad Fitzpatrick2022-09-041-16/+16
| | | | | Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> 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: apply gofumptJason A. Donenfeld2021-12-091-3/+5
| | | | Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* global: use netip where possible nowJason A. Donenfeld2021-11-231-10/+9
| | | | | | | | 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>
* conn,wintun: use unsafe.Slice instead of unsafeSliceJason A. Donenfeld2021-10-111-21/+1
| | | | Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* conn: windows: set count=0 on retryJason A. Donenfeld2021-05-111-0/+1
| | | | | | | | When retrying, if count is not 0, we forget to dequeue another request, and so the ring fills up and errors out. Reported-by: Sascha Dierberg <dierberg@dresearch-fe.de> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* conn: windows: do not error out when receiving UDP jumbogramJason A. Donenfeld2021-04-261-2/+14
| | | | | | | | | | | | If we receive a large UDP packet, don't return an error to receive.go, which then terminates the receive loop. Instead, simply retry. Considering Winsock's general finickiness, we might consider other places where an attacker on the wire can generate error conditions like this. Reported-by: Sascha Dierberg <sascha.dierberg@gmail.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* conn: windows: reset ring to starting position after freeJason A. Donenfeld2021-04-091-0/+3
| | | | Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* conn: windows: compare head and tail properlyJason A. Donenfeld2021-04-091-1/+1
| | | | | | | | By not comparing these with the modulo, the ring became nearly never full, resulting in completion queue buffers filling up prematurely. Reported-by: Joshua Sjoding <joshua.sjoding@scjalliance.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* all: make conn.Bind.Open return a slice of receive functionsJosh Bleecher Snyder2021-04-021-9/+13
| | | | | | | | | | | | | | | | | Instead of hard-coding exactly two sources from which to receive packets (an IPv4 source and an IPv6 source), allow the conn.Bind to specify a set of sources. Beneficial consequences: * If there's no IPv6 support on a system, conn.Bind.Open can choose not to return a receive function for it, which is simpler than tracking that state in the bind. This simplification removes existing data races from both conn.StdNetBind and bindtest.ChannelBind. * If there are more than two sources on a system, the conn.Bind no longer needs to add a separate muxing layer. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>
* conn: implement RIO for fast Windows UDP socketsJason A. Donenfeld2021-02-251-0/+581
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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