[PATCH nft] parser_bison: allow to restore limit from dynamic set

[PATCH nft] parser_bison: allow to restore limit from dynamic set

[Pablo Neira Ayuso]

Update parser to allow to restore limit per set element in dynamic set.

Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1477
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 src/parser_bison.y                            | 32 +++++++++++++++++++
 .../shell/testcases/sets/0056dynamic_limit_0  | 19 +++++++++++
 2 files changed, 51 insertions(+)
 create mode 100755 tests/shell/testcases/sets/0056dynamic_limit_0

diff --git a/src/parser_bison.y b/src/parser_bison.y
index a88844661af5..fb329919ea95 100644
--- a/src/parser_bison.y
+++ b/src/parser_bison.y
@@ -4097,6 +4097,38 @@ set_elem_expr_option	:	TIMEOUT			time_spec
 				stmt->counter.bytes = $5;
 				$<expr>0->stmt = stmt;
 			}
+			|	LIMIT   RATE    limit_mode      NUM     SLASH   time_unit       limit_burst_pkts
+			{
+				struct stmt *stmt;
+
+				stmt = limit_stmt_alloc(&@$);
+				stmt->limit.rate  = $4;
+				stmt->limit.unit  = $6;
+				stmt->limit.burst = $7;
+				stmt->limit.type  = NFT_LIMIT_PKTS;
+				stmt->limit.flags = $3;
+				$<expr>0->stmt = stmt;
+			}
+			|       LIMIT   RATE    limit_mode      NUM     STRING  limit_burst_bytes
+			{
+				struct error_record *erec;
+				uint64_t rate, unit;
+				struct stmt *stmt;
+
+				erec = rate_parse(&@$, $5, &rate, &unit);
+				xfree($5);
+				if (erec != NULL) {
+					erec_queue(erec, state->msgs);
+					YYERROR;
+				}
+
+				stmt = limit_stmt_alloc(&@$);
+				stmt->limit.rate  = rate * $4;
+				stmt->limit.unit  = unit;
+				stmt->limit.burst = $6;
+				stmt->limit.type  = NFT_LIMIT_PKT_BYTES;
+				stmt->limit.flags = $3;
+                        }
 			|	comment_spec
 			{
 				if (already_set($<expr>0->comment, &@1, state)) {
diff --git a/tests/shell/testcases/sets/0056dynamic_limit_0 b/tests/shell/testcases/sets/0056dynamic_limit_0
new file mode 100755
index 000000000000..21fa0bff5a61
--- /dev/null
+++ b/tests/shell/testcases/sets/0056dynamic_limit_0
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+RULESET="table inet filter {
+        set ssh_meter {
+                type ipv4_addr
+                size 65535
+                flags dynamic,timeout
+                timeout 1m
+                elements = { 127.0.0.1 expires 52s44ms limit rate over 1/minute }
+        }
+
+        chain output {
+                type filter hook output priority filter; policy accept;
+                ip protocol icmp add @ssh_meter { ip saddr timeout 1m limit rate over 1/minute }
+        }
+}"
+
+set -e
+$NFT -f - <<< $EXPECTED
-- 
2.20.1