Re: [nft PATCH v2] parser_bison: Accept arbitrary user-defined names by quoting

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On Mon, Jun 24, 2019 at 06:36:08PM +0200, Phil Sutter wrote:
> Parser already allows to quote user-defined strings in some places to
> avoid clashing with defined keywords, but not everywhere. Extend this
> support further and add a test case for it.
> 
> Signed-off-by: Phil Sutter <phil@xxxxxx>
> ---
> Changes since v1:
> - Fix testcase, I forgot to commit adjustments done to it.
> 
> Note: This is a reduced variant of "src: Quote user-defined names" sent
>       back in January. Discussion was not conclusive regarding whether
>       to quote these names on output or not, but I assume allowing for
>       users to specify them by adding quotes is a step forward without
>       drawbacks.

So this will fail later on, right?

        nft list ruleset > file.nft
        nft -f file.nft

> ---
>  src/parser_bison.y                            |  3 ++-
>  .../shell/testcases/nft-f/0018quoted-names_0  | 20 +++++++++++++++++++
>  2 files changed, 22 insertions(+), 1 deletion(-)
>  create mode 100755 tests/shell/testcases/nft-f/0018quoted-names_0
> 
> diff --git a/src/parser_bison.y b/src/parser_bison.y
> index 670e91f544c75..de8b097a4c222 100644
> --- a/src/parser_bison.y
> +++ b/src/parser_bison.y
> @@ -1761,7 +1761,7 @@ flowtable_list_expr	:	flowtable_expr_member
>  			|	flowtable_list_expr	COMMA	opt_newline
>  			;
>  
> -flowtable_expr_member	:	STRING
> +flowtable_expr_member	:	string
>  			{
>  				$$ = symbol_expr_alloc(&@$, SYMBOL_VALUE,
>  						       current_scope(state),
> @@ -1968,6 +1968,7 @@ chain_policy		:	ACCEPT		{ $$ = NF_ACCEPT; }
>  			;
>  
>  identifier		:	STRING
> +			|	QUOTED_STRING
>  			;
>  
>  string			:	STRING
> diff --git a/tests/shell/testcases/nft-f/0018quoted-names_0 b/tests/shell/testcases/nft-f/0018quoted-names_0
> new file mode 100755
> index 0000000000000..6526d66b8e8a1
> --- /dev/null
> +++ b/tests/shell/testcases/nft-f/0018quoted-names_0
> @@ -0,0 +1,20 @@
> +#!/bin/bash
> +
> +# Test if keywords are allowed as names if quoted
> +
> +set -e
> +
> +RULESET='
> +table inet "day" {
> +	chain "minute" {}
> +	set "hour" { type inet_service; }
> +	flowtable "second" { hook ingress priority 0; devices = { "lo" }; }
> +	counter "table" { packets 0 bytes 0 }
> +	quota "chain" { 10 bytes }
> +}'
> +
> +$NFT -f - <<< "$RULESET"
> +
> +# XXX: not possible (yet)
> +#OUTPUT=$($NFT list ruleset)
> +#$NFT -f - <<< "$OUTPUT"
> -- 
> 2.21.0
> 



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