diff options
Diffstat (limited to 'src/evaluate.c')
| -rw-r--r-- | src/evaluate.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/src/evaluate.c b/src/evaluate.c index 47a1f8ca..28e17cb2 100644 --- a/src/evaluate.c +++ b/src/evaluate.c @@ -344,18 +344,29 @@ conflict_resolution_gen_dependency(struct eval_ctx *ctx, int protocol, } /* - * Exthdr expression: check whether dependencies are fulfilled. + * Exthdr expression: check whether dependencies are fulfilled, otherwise + * generate the necessary relational expression and prepend it to the current + * statement. */ static int expr_evaluate_exthdr(struct eval_ctx *ctx, struct expr **expr) { const struct proto_desc *base; + struct stmt *nstmt; base = ctx->pctx.protocol[PROTO_BASE_NETWORK_HDR].desc; if (base == &proto_ip6) return expr_evaluate_primary(ctx, expr); - return expr_error(ctx->msgs, *expr, - "exthdr can only be used with ipv6"); + if (base) + return expr_error(ctx->msgs, *expr, + "cannot use exthdr with %s", base->name); + + if (exthdr_gen_dependency(ctx, *expr, &nstmt) < 0) + return -1; + + list_add(&nstmt->list, &ctx->rule->stmts); + + return expr_evaluate_primary(ctx, expr); } /* dependency supersede. |