src: allow to use variables in flowtable and chain devices

This patch adds support for using variables for devices in the chain and
flowtable definitions, eg.

 define if_main = lo

 table netdev filter1 {
    chain Main_Ingress1 {
        type filter hook ingress device $if_main priority -500; policy accept;
    }
 }

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

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/shell/testcases/chains/dumps/0042chain_variable_0.nft b/tests/shell/testcases/chains/dumps/0042chain_variable_0.nft
new file mode 100644
index 00000000..12931aad
--- /dev/null
+++ b/tests/shell/testcases/chains/dumps/0042chain_variable_0.nft
@@ -0,0 +1,15 @@
+table netdev filter1 {
+	chain Main_Ingress1 {
+		type filter hook ingress device "lo" priority -500; policy accept;
+	}
+}
+table netdev filter2 {
+	chain Main_Ingress2 {
+		type filter hook ingress devices = { dummy0, lo } priority -500; policy accept;
+	}
+}
+table netdev filter3 {
+	chain Main_Ingress3 {
+		type filter hook ingress devices = { dummy0, lo } priority -500; policy accept;
+	}
+}