Allows the ability to set NETLINK_GET_STRICT_CHK socket option on netlink handles.
This can be used to avoid missing routes due to a kernel bug[1]. The
choice to make this a toggle is because not all operations use the
correctly formatted message and so some will fail. The scope of
determining which calls use the wrong message format is an unknown
amount of work at this time so we give the consumer of the library a
toggle they can use when needed.
[1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=885b8b4dbba5ca6114db0fcd0737fe2512650745
When receiving a lot of route changes (10,000 routes are enough), the
default receive buffer size (value of
`/proc/sys/net/core/rmem_default`) is too small and we get a `ENOBUF`
error. A user may want to increase the buffer size up to the value of
`/proc/sys/net/core/rmem_max` (by default, this is the same value). A
`SetSocketReceiveBufferSize()` function is provided to this
destination.
Possible improvements:
1. automatically increase receive buffer size in higher level
functions until we hit a maximum (get an error and/or the current
value is smaller than expected)
2. accept a "force" argument to use `SO_RCVBUFFORCE` to increase the
value over `rmem_max` value
If the socket is closed the recv that are waiting for messages
are not woken up. The result especially for Subscribe socket is
most likely a go routine leak.
This commit introduces a method to set the timeout
Signed-off-by: Flavio Crisciani <flavio.crisciani@docker.com>
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