Re: UDP Send gets NETWORK_IS_UNREACHABLE

[Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP>]

On 2018-07-06, Petter Fryklund <petter.fryklund@atero.se> wrote:
> Sorry, I got all mixed up. The socket that will send is created by
> getting it's IP from Get_Host_By_Name index 1. In this case
> 127.0.0.1:33333. Then when we try to broadcast to 192.168.255.255 we get
> the NETWORK_IS_UNREACHABLE, maybe because Linux doesn't know which
> interface to use. So we need to supply the correct IP, 192.168.0.20
> somewhere in our class hierarchy, some 5 levels deep.
>

Are you sure that 192.168.255.255 is correct ?

192.168.x.y is by default a class C network (or maybe even smaller
if CIDR is active), not a class B. As such, I wonder if 192.168.0.255
is the correct broadcast address, given the IP address you give above ?

It may be possible to turn 192.168.x.y into a class B, but I have never
seen it done.

Simon.

-- 
Simon Clubley, clubley@remove_me.eisner.decus.org-Earth.UFP
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