meta: introduce datatype ifname_type

This new datatype is a string subtype.
It will allow us to build named maps/sets using meta keys like 'iifname',
'oifname', 'ibriport' or 'obriport'.

Example:

table inet t {
	set s {
		type ifname
		elements = { "eth0",
			     "eth1" }
	}

	chain c {
		iifname @s accept
		oifname @s accept
	}
}

Signed-off-by: Arturo Borrero Gonzalez <arturo@netfilter.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 35 insertions, 0 deletions

diff --git a/tests/shell/testcases/maps/0007named_ifname_dtype_0 b/tests/shell/testcases/maps/0007named_ifname_dtype_0
new file mode 100755
index 00000000..dcbcf2f0
--- /dev/null
+++ b/tests/shell/testcases/maps/0007named_ifname_dtype_0
@@ -0,0 +1,35 @@
+#!/bin/bash
+
+# support for ifname in named maps
+
+tmpfile=$(mktemp)
+if [ ! -w $tmpfile ] ; then
+	echo "Failed to create tmp file" >&2
+	exit 0
+fi
+
+trap "rm -rf $tmpfile" EXIT # cleanup if aborted
+
+EXPECTED="table inet t {
+	map m1 {
+		type ifname : ipv4_addr
+		elements = { \"eth0\" : 1.1.1.1 }
+	}
+
+	chain c {
+		ip daddr set iifname map @m1
+		ip daddr set oifname map @m1
+	}
+}"
+
+set -e
+echo "$EXPECTED" > $tmpfile
+$NFT -f $tmpfile
+
+GET="$($NFT list ruleset)"
+if [ "$EXPECTED" != "$GET" ] ; then
+        DIFF="$(which diff)"
+        [ -x $DIFF ] && $DIFF -u <(echo "$EXPECTED") <(echo "$GET")
+        exit 1
+fi
+