[nft PATCH 1/2 v3] evaluate: reject: accept a reject reason with incorrect network context

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nft add rule bridge test-bridge input ether type ip \
				reject with icmpv6 type no-route

This rule pass the evaluation step but the network context is incompatible with
the reject reason. In that cases, we have to throw an error like "conflicting
protocols specified: ip vs ip6"

Signed-off-by: Alvaro Neira Ayuso <alvaroneay@xxxxxxxxx>
---
[no changes in v3]

 src/evaluate.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/evaluate.c b/src/evaluate.c
index ff46fda..977f6b4 100644
--- a/src/evaluate.c
+++ b/src/evaluate.c
@@ -1237,6 +1237,8 @@ static int stmt_evaluate_reject_family(struct eval_ctx *ctx, struct stmt *stmt,
 			case __constant_htons(ETH_P_IP):
 				if (NFPROTO_IPV4 == stmt->reject.family)
 					break;
+				return stmt_error(ctx, stmt,
+				  "conflicting protocols specified: ip vs ip6");
 			case __constant_htons(ETH_P_IPV6):
 				if (NFPROTO_IPV6 == stmt->reject.family)
 					break;
-- 
1.7.10.4

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