Handle EHOSTDOWN errno.

[arekm]

Handle EHOSTDOWN which occurs on MacOS and causes:

% mtr 192.168.68.2
mtr: Unexpected mtr-packet error

for unreachable host.

[rewolff]

The code snippet around your added line seems to collapse multiple error codes down to just one Your added line "joins the crowd".

I personally strongly dislike this collapsing of error codes. It would be very much appreciated if you figure out where the further processing of these error messages from mtr-packet happen and then add new error codes there as well...

[arekm]

Did that way because existing code does it already

 } else if (errno == ENETUNREACH) {
        printf("%d no-route\n", command_token);
    } else if (errno == EHOSTUNREACH) {
        printf("%d no-route\n", command_token);

and EHOSTDOWN fits in that.

These would also need to be split.

[rewolff]

Correct!
So since you're already "working on that code" I'd appreciate the help if you could "improve" it further by splitting it now. Maybe add a comment that I don't want error codes collapsed in the future.