[PATCH nft 01/11] evaluate: resolve_protocol_conflict() should return int

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

Instead of bool, expr_error() returns -1 if we fail to create
dependencies. We need to propagate this error value.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 src/evaluate.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/src/evaluate.c b/src/evaluate.c
index 5e9783d..7898ed4 100644
--- a/src/evaluate.c
+++ b/src/evaluate.c
@@ -371,8 +371,7 @@ static bool supersede_dep(const struct proto_desc *have,
 	return true;
 }
 
-static bool resolve_protocol_conflict(struct eval_ctx *ctx,
-				      struct expr *payload)
+static int resolve_protocol_conflict(struct eval_ctx *ctx, struct expr *payload)
 {
 	const struct hook_proto_desc *h = &hook_proto_desc[ctx->pctx.family];
 	enum proto_bases base = payload->payload.base;
@@ -381,14 +380,13 @@ static bool resolve_protocol_conflict(struct eval_ctx *ctx,
 	int link;
 
 	desc = ctx->pctx.protocol[base].desc;
-
 	if (desc == payload->payload.desc) {
 		payload->payload.offset += ctx->pctx.protocol[base].offset;
-		return true;
+		return 0;
 	}
 
 	if (payload->payload.base != h->base)
-		return false;
+		return 1;
 
 	if (supersede_dep(desc, payload)) {
 		uint16_t type;
@@ -405,7 +403,7 @@ static bool resolve_protocol_conflict(struct eval_ctx *ctx,
 
 		list_add_tail(&nstmt->list, &ctx->stmt->list);
 		ctx->pctx.protocol[base].desc = payload->payload.desc;
-		return true;
+		return 0;
 	}
 
 	if (base < PROTO_BASE_MAX) {
@@ -416,21 +414,21 @@ static bool resolve_protocol_conflict(struct eval_ctx *ctx,
 			ctx->pctx.protocol[base].desc = next;
 			ctx->pctx.protocol[base].offset += desc->length;
 			payload->payload.offset += desc->length;
-			return true;
+			return 0;
 		} else if (next) {
-			return false;
+			return 1;
 		}
 	}
 
 	link = proto_find_num(desc, payload->payload.desc);
 	if (link < 0 || conflict_resolution_gen_dependency(ctx, link, payload, &nstmt) < 0)
-		return false;
+		return 1;
 
 	payload->payload.offset += ctx->pctx.protocol[base].offset;
 	list_add_tail(&nstmt->list, &ctx->stmt->list);
 	ctx->pctx.protocol[base + 1].desc = NULL;
 
-	return true;
+	return 0;
 }
 
 /*
@@ -443,17 +441,21 @@ static int __expr_evaluate_payload(struct eval_ctx *ctx, struct expr *expr)
 	struct expr *payload = expr;
 	enum proto_bases base = payload->payload.base;
 	struct stmt *nstmt;
+	int err;
 
 	if (ctx->pctx.protocol[base].desc == NULL) {
 		if (payload_gen_dependency(ctx, payload, &nstmt) < 0)
 			return -1;
 		list_add_tail(&nstmt->list, &ctx->stmt->list);
-	} else if (!resolve_protocol_conflict(ctx, payload))
+	} else {
+		err = resolve_protocol_conflict(ctx, payload);
+		if (err <= 0)
+			return err;
 		return expr_error(ctx->msgs, payload,
 				  "conflicting protocols specified: %s vs. %s",
 				  ctx->pctx.protocol[base].desc->name,
 				  payload->payload.desc->name);
-
+	}
 	return 0;
 }
 
-- 
2.1.4