James Tucker 95034e15a7 cmd/natc: fix ip allocation runtime
Avoid the unbounded runtime during random allocation, if random
allocation fails after a first pass at random through the provided
ranges, pick the next free address by walking through the allocated set.

The new ipx utilities provide a bitset based allocation pool, good for
small to moderate ranges of IPv4 addresses as used in natc.

Updates #15367

Signed-off-by: James Tucker <james@tailscale.com>
2025-04-01 10:23:11 -07:00
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2025-04-01 10:23:11 -07:00
2025-04-01 10:23:11 -07:00