expr: Introduce nftnl_expr_fprintf()

Implement expression printing into a FILE pointer analogous to
nftnl_rule_fprintf().

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/libnftnl.map b/src/libnftnl.map
index 1892c98..d59e802 100644
--- a/src/libnftnl.map
+++ b/src/libnftnl.map
@@ -307,3 +307,7 @@ global:
 
 local: *;
 };
+
+LIBNFTNL_6 {
+  nftnl_expr_fprintf;
+} LIBNFTNL_5;