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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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