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From 032a1808c1abb70004703f57c2d1625a099beca3 Mon Sep 17 00:00:00 2001
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From: Phil Sutter <psutter@redhat.com>
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Date: Fri, 15 Mar 2019 12:59:19 +0100
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Subject: [PATCH] src: bail out when exporting ruleset with unsupported output
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1646336
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Upstream Status: nftables commit a340aa6ca6cd0
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Conflicts:
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* Dropped changes to import command which doesn't exist in RHEL7.
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* Changes to parser_bison.y applied manually. Major conflicts due to
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missing commit 2fa54d8a49352 ("src: Add import command for low level
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json").
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* Adjusted to missing commit 2fa54d8a49352 ("src: Add import command for
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low level json").
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commit a340aa6ca6cd08ae173fbb95cd3e65807264df07
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Author: Pablo Neira Ayuso <pablo@netfilter.org>
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Date: Thu Feb 15 17:22:16 2018 +0100
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src: bail out when exporting ruleset with unsupported output
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Display error message and propagate error to shell when running command
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with unsupported output:
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# nft export ruleset json
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Error: this output type is not supported
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export ruleset json
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^^^^^^^^^^^^^^^^^^^^
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# echo $?
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1
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When displaying the output in json using the low-level VM
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representation, it shows:
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# nft export ruleset vm json
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... low-level VM json output
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# echo $?
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0
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While at it, do the same with obsoleted XML output.
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Fixes: https://bugzilla.netfilter.org/show_bug.cgi?id=1224
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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---
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include/nftables.h | 2 ++
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src/evaluate.c | 3 +++
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src/parser_bison.y | 4 ++--
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3 files changed, 7 insertions(+), 2 deletions(-)
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diff --git a/include/nftables.h b/include/nftables.h
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index 01d72a8..0abbcaf 100644
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--- a/include/nftables.h
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+++ b/include/nftables.h
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@@ -154,4 +154,6 @@ int nft_print(struct output_ctx *octx, const char *fmt, ...)
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int nft_gmp_print(struct output_ctx *octx, const char *fmt, ...)
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__attribute__((format(printf, 2, 0)));
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+#define __NFT_OUTPUT_NOTSUPP UINT_MAX
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+
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#endif /* NFTABLES_NFTABLES_H */
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diff --git a/src/evaluate.c b/src/evaluate.c
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index ab1347f..c8a98f1 100644
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--- a/src/evaluate.c
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+++ b/src/evaluate.c
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@@ -3426,6 +3426,9 @@ static int cmd_evaluate_monitor(struct eval_ctx *ctx, struct cmd *cmd)
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static int cmd_evaluate_export(struct eval_ctx *ctx, struct cmd *cmd)
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{
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+ if (cmd->export->format == __NFT_OUTPUT_NOTSUPP)
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+ return cmd_error(ctx, "this output type is not supported");
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+
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return cache_update(ctx->nf_sock, ctx->cache, cmd->op, ctx->msgs,
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ctx->debug_mask & DEBUG_NETLINK, ctx->octx);
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}
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diff --git a/src/parser_bison.y b/src/parser_bison.y
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index f9878ba..e87669e 100644
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--- a/src/parser_bison.y
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+++ b/src/parser_bison.y
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@@ -1204,8 +1204,8 @@ monitor_format : /* empty */ { $$ = NFTNL_OUTPUT_DEFAULT; }
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| export_format
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;
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-export_format : XML { $$ = NFTNL_OUTPUT_XML; }
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- | JSON { $$ = NFTNL_OUTPUT_JSON; }
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+export_format : XML { $$ = __NFT_OUTPUT_NOTSUPP; }
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+ | JSON { $$ = __NFT_OUTPUT_NOTSUPP; }
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;
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describe_cmd : primary_expr
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--
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1.8.3.1
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