src: quote user-defined strings when used from rule selectors

The following selectors display strings using quotes:

* meta iifname
* meta oifname
* meta ibriport
* meta obriport

However, the following do not:

* meta oif
* meta iif
* meta skuid
* meta skgid
* meta iifgroup
* meta oifgroup
* meta rtclassid
* ct label

Given they refer to user-defined values, neither keywords nor internal
built-in known values, let's quote the output of this.

This patch modifies symbolic_constant_print() so we can signal this to
indicate if the string needs to be quoted.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/src/proto.c b/src/proto.c
index 4c12977c..94995f10 100644
--- a/src/proto.c
+++ b/src/proto.c
@@ -871,7 +871,7 @@ static const struct symbol_table ethertype_tbl = {
 
 static void ethertype_print(const struct expr *expr)
 {
-	return symbolic_constant_print(&ethertype_tbl, expr);
+	return symbolic_constant_print(&ethertype_tbl, expr, false);
 }
 
 const struct datatype ethertype_type = {