ospfd: validate input SRGB and SRLB

The code was not checking if in these label ranges [a,b], a is
smaller than b, which is assumed in several places, including when
determining the size of the block as b-a+1. As a consequence, the
results of a bad configuration can be unpredictable. Some effects
observed were: 1) segfault 2) de-activation of SR due to label
reservation failure.

The added validation function also checks if the SR blocks are
larger than some minimal size. RFC 8665 mandates that the blocks
be srictly larger than zero. In this patch, the minimum sized is
arbitrarily defined to be 16.

Checking if ranges would fall outside [16,1048575] is omitted
since the vty filtering takes care of that.

Signed-off-by: Fredi Raspall <fredi@voltanet.io>

0 files changed, 0 insertions, 0 deletions