parser_bison: fail when specifying multiple comments

Before this patch grammar supported specifying multiple comments, and
only the last value would be assigned.

This patch adds a function to test if an attribute is already assigned
and, if so, calls erec_queue with this attribute location.

Use this function in order to check for duplication (or more) of comments
for actions that support it.

> nft add table inet filter { flags "dormant"\; comment "test"\; comment "another"\;}

Error: You can only specify this once. This statement is duplicated.
add table inet filter { flags dormant; comment test; comment another;}
                                                     ^^^^^^^^^^^^^^^^

Signed-off-by: Jose M. Guisado Gomez <guigom@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

0 files changed, 0 insertions, 0 deletions