[PATCH 2/2 nft WIP v2] jump: Allow jump to a variable when using nft input files

[Fernando Fernandez Mancera]

This patch introduces the use of nft input files variables in 'jump'
statements, e.g.

define dest = chainame

add rule ip filter input jump $dest

Signed-off-by: Fernando Fernandez Mancera <ffmanc...@riseup.net>
---
 src/parser_bison.y | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/parser_bison.y b/src/parser_bison.y
index 69b5773..42fd71f 100644
--- a/src/parser_bison.y
+++ b/src/parser_bison.y
@@ -3841,7 +3841,13 @@ verdict_expr             :       ACCEPT
                        }
                        ;
 
-chain_expr             :       identifier
+chain_expr             :       variable_expr
+                       {
+                               $$ = symbol_expr_alloc(&@$, SYMBOL_VALUE,
+                                                      current_scope(state),
+                                                      $1->sym->identifier);
+                       }
+                       |       identifier
                        {
                                $$ = constant_expr_alloc(&@$, &string_type,
                                                         BYTEORDER_HOST_ENDIAN,
-- 
2.20.1