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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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Bump go.mod and README.
Switch to upstream net/netip.
Use strings.Cut.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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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>
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This is kind of gross but it's better than the alternatives.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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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>
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It's not obvious on a first read what the loop is doing.
Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>
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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>
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The sending code is identical for ipv4 and ipv6;
select the conn, then use it.
Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>
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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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