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* global: use Go 1.18's netip helpersjd/netip-go118Jason A. Donenfeld2021-11-061-29/+23
| | | | Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* global: use netip where possible nowJason A. Donenfeld2021-11-061-6/+12
| | | | | | | | 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: reconstruct v4 vs v6 receive function based on symtabJason A. Donenfeld2021-04-121-4/+11
| | | | | | This is kind of gross but it's better than the alternatives. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* all: make conn.Bind.Open return a slice of receive functionsJosh Bleecher Snyder2021-04-021-31/+38
| | | | | | | | | | | | | | | | | 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: document retry loop in StdNetBind.OpenJosh Bleecher Snyder2021-03-301-0/+3
| | | | | | It's not obvious on a first read what the loop is doing. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>
* conn: use local ipvN vars in StdNetBind.OpenJosh Bleecher Snyder2021-03-301-11/+9
| | | | | | | | | This makes it clearer that they are fresh on each attempt, and avoids the bookkeeping required to clearing them on failure. Also, remove an unnecessary err != nil. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>
* conn: unify code in StdNetBind.SendJosh Bleecher Snyder2021-03-301-14/+13
| | | | | | | The sending code is identical for ipv4 and ipv6; select the conn, then use it. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>
* conn: implement RIO for fast Windows UDP socketsJason A. Donenfeld2021-02-251-0/+2
| | | | Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* conn: make binds replacableJason A. Donenfeld2021-02-231-0/+180
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>