src: add nft_*_attr_{set|get}_data interface

This patch adds two functions that allows you to validate the size
of the attribute. This new functions provide a replacement for
nft_rule_attr_set and nft_rule_attr_get.

The data_len parameter was already passed to the {_set|_get} funcion
in expressions. For consistency, add nft_rule_expr_{set|get}_data
alias.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/libnftnl.map b/src/libnftnl.map
index 43378ed..7c4e6ca 100644
--- a/src/libnftnl.map
+++ b/src/libnftnl.map
@@ -196,3 +196,14 @@ global:
 
 local: *;
 };
+
+LIBNFTNL_1.1 {
+  nft_table_attr_set_data;
+  nft_table_attr_get_data;
+  nft_chain_attr_set_data;
+  nft_chain_attr_get_data;
+  nft_rule_attr_set_data;
+  nft_rule_attr_get_data;
+  nft_set_attr_set_data;
+  nft_set_attr_get_data;
+} LIBNFTNL_1.0;