From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pablo Neira Ayuso <pablo@netfilter.org>
Subject: Re: BUG: nft cannot "list ruleset" with interval maps
Date: Wed, 8 Feb 2017 18:28:15 +0100
Message-ID: <20170208172815.GA28759@salvia>
References: <f6c01a5c-33f4-0c90-96e1-8abf7777b4b8@pobox.com>
Mime-Version: 1.0
Return-path: <netfilter-owner@vger.kernel.org>
Content-Disposition: inline
In-Reply-To: <f6c01a5c-33f4-0c90-96e1-8abf7777b4b8@pobox.com>
Sender: netfilter-owner@vger.kernel.org
List-ID: <netfilter.vger.kernel.org>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
To: Robert White <rwhite@pobox.com>
Cc: netfilter@vger.kernel.org

On Wed, Feb 08, 2017 at 05:00:18PM +0000, Robert White wrote:
> (please forgive stupid email word wrap)
> 
> # nft table ip nat
> # nft map nat dnat_example { type inet_service: ipv4_addr\; flags interval
> \; }
> # nft element nat dnat_example { 3476-3480 : 192.168.14.12 }
> # nft list ruleset
> table ip nat {
> 	map dnat_example {
> 		type inet_service : ipv4_addr
> 		flags interval
> nft: mini-gmp.c:4311: mpz_export: Assertion `size > 0 || u->_mp_size == 0'
> failed.
> 		elements = { 3476-Aborted
> 
> So the entry seems to have gotten in alright but it can't come back out
> normally. I can tell because a "export json" works
> 
> # nft export json
> {"nftables":[{"table":{"name":"nat","family":"ip","flags":0,"use":1}},{"set":{"name":"dnat_example","table":"nat","flags":12,"family":"ip","key_type":13,"key_len":2,"data_type":7,"data_len":4,"set_elem":[{"flags":1,"key":{"reg":{"type":"value","len":2,"data0":"0x0000990d"}}},{"key":{"reg":{"type":"value","len":2,"data0":"0x0000940d"}},"data":{"reg":{"type":"value","len":4,"data0":"0x0c0ea8c0"}}},{"flags":1,"key":{"reg":{"type":"value","len":2,"data0":"0x00000000"}}}]}}]}
> 
> 
> NOTE: interval sets work fine:
> 
> # nft list ruleset
> table ip nat {
> 	set portrange {
> 		type inet_service
> 		flags interval
> 		elements = { 3776-3780}
> 	}
> }

What nft version are you using? This works fine with nft git
snapshots. Please, give it a try and confirm.

Thanks.