[PATCH nft,v2 2/2] evaluate: do not allow to list/flush anonymous sets via list command

[Pablo Neira Ayuso <pablo@netfilter.org>]

Don't allow this:

 # nft list set x __set0
 table ip x {
        set __set0 {
                type ipv4_addr
                flags constant
                elements = { 1.1.1.1 }
        }
 }

Anonymous sets never change and they are attached to a rule, do not list
their content.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
v2: extend testcase to cover maps. Extend it to cover flush command too.

 src/evaluate.c                                | 19 +++++++++------
 tests/shell/testcases/listing/0016anonymous_0 | 33 +++++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 7 deletions(-)
 create mode 100755 tests/shell/testcases/listing/0016anonymous_0

diff --git a/src/evaluate.c b/src/evaluate.c
index 07617a7c94cb..5b1946a1fd09 100644
--- a/src/evaluate.c
+++ b/src/evaluate.c
@@ -3587,7 +3587,8 @@ static int cmd_evaluate_list(struct eval_ctx *ctx, struct cmd *cmd)
 			return table_not_found(ctx);
 
 		set = set_lookup(table, cmd->handle.set.name);
-		if (set == NULL || set->flags & NFT_SET_MAP)
+		if (set == NULL ||
+		    set->flags & (NFT_SET_MAP | NFT_SET_ANONYMOUS))
 			return set_not_found(ctx, &ctx->cmd->handle.set.location,
 					     ctx->cmd->handle.set.name);
 
@@ -3598,7 +3599,8 @@ static int cmd_evaluate_list(struct eval_ctx *ctx, struct cmd *cmd)
 			return table_not_found(ctx);
 
 		set = set_lookup(table, cmd->handle.set.name);
-		if (set == NULL || !(set->flags & NFT_SET_EVAL))
+		if (set == NULL || !(set->flags & NFT_SET_EVAL) ||
+		    !(set->flags & NFT_SET_ANONYMOUS))
 			return set_not_found(ctx, &ctx->cmd->handle.set.location,
 					     ctx->cmd->handle.set.name);
 
@@ -3609,7 +3611,8 @@ static int cmd_evaluate_list(struct eval_ctx *ctx, struct cmd *cmd)
 			return table_not_found(ctx);
 
 		set = set_lookup(table, cmd->handle.set.name);
-		if (set == NULL || !(set->flags & NFT_SET_MAP))
+		if (set == NULL || !(set->flags & NFT_SET_MAP) ||
+		    set->flags & NFT_SET_ANONYMOUS)
 			return set_not_found(ctx, &ctx->cmd->handle.set.location,
 					     ctx->cmd->handle.set.name);
 
@@ -3698,10 +3701,10 @@ static int cmd_evaluate_flush(struct eval_ctx *ctx, struct cmd *cmd)
 			return table_not_found(ctx);
 
 		set = set_lookup(table, cmd->handle.set.name);
-		if (set == NULL || set->flags & NFT_SET_MAP)
+		if (set == NULL ||
+		    (set->flags & (NFT_SET_MAP | NFT_SET_ANONYMOUS)))
 			return set_not_found(ctx, &ctx->cmd->handle.set.location,
 					     ctx->cmd->handle.set.name);
-
 		return 0;
 	case CMD_OBJ_MAP:
 		table = table_lookup(&cmd->handle, &ctx->nft->cache);
@@ -3709,7 +3712,8 @@ static int cmd_evaluate_flush(struct eval_ctx *ctx, struct cmd *cmd)
 			return table_not_found(ctx);
 
 		set = set_lookup(table, cmd->handle.set.name);
-		if (set == NULL || !(set->flags & NFT_SET_MAP))
+		if (set == NULL || !(set->flags & NFT_SET_MAP) ||
+		    set->flags & NFT_SET_ANONYMOUS)
 			return set_not_found(ctx, &ctx->cmd->handle.set.location,
 					     ctx->cmd->handle.set.name);
 
@@ -3720,7 +3724,8 @@ static int cmd_evaluate_flush(struct eval_ctx *ctx, struct cmd *cmd)
 			return table_not_found(ctx);
 
 		set = set_lookup(table, cmd->handle.set.name);
-		if (set == NULL || !(set->flags & NFT_SET_EVAL))
+		if (set == NULL || !(set->flags & NFT_SET_EVAL) ||
+		    !(set->flags & NFT_SET_ANONYMOUS))
 			return set_not_found(ctx, &ctx->cmd->handle.set.location,
 					     ctx->cmd->handle.set.name);
 
diff --git a/tests/shell/testcases/listing/0016anonymous_0 b/tests/shell/testcases/listing/0016anonymous_0
new file mode 100755
index 000000000000..83acbccae7db
--- /dev/null
+++ b/tests/shell/testcases/listing/0016anonymous_0
@@ -0,0 +1,33 @@
+#!/bin/bash
+
+$NFT add table x
+$NFT add chain x y
+$NFT add rule x y ip saddr { 1.1.1.1 }
+$NFT add rule x y meta mark set ip saddr map { 1.1.1.1 : 2 }
+
+$NFT list set x __set0 &>/dev/null
+ret=$?
+if [ $ret -eq 0 ]
+then
+	exit 1
+fi
+
+$NFT flush set x __set0 &>/dev/null
+ret=$?
+if [ $ret -eq 0 ]
+then
+	exit 1
+fi
+
+$NFT list map x __map0 &>/dev/null
+if [ $ret -eq 0 ]
+then
+	exit 1
+fi
+
+$NFT flush map x __map0 &>/dev/null
+ret=$?
+if [ $ret -eq 0 ]
+then
+	exit 1
+fi
-- 
2.11.0