From: Carlos O'Donell <carlos@redhat.com>
To: Florian Weimer <fweimer@redhat.com>
Cc: libc-alpha@sourceware.org
Subject: Re: [PATCH 1/2] nss: Implement --no-addrconfig option for getent
Date: Wed, 14 Sep 2022 18:34:07 -0400 [thread overview]
Message-ID: <YyJW33iF9GuiozPw@fedora> (raw)
In-Reply-To: <462265b0ce37bd57b9304d873e9bccdb1cc4a199.1663079342.git.fweimer@redhat.com>
On Tue, Sep 13, 2022 at 04:35:44PM +0200, Florian Weimer via Libc-alpha wrote:
> The ahosts, ahostsv4, ahostsv6 commands unconditionally pass
> AI_ADDRCONFIG to getaddrinfo, which is not always desired.
Looking forward to a v2.
> ---
> NEWS | 5 ++++-
> nss/getent.c | 11 ++++++++++-
> 2 files changed, 14 insertions(+), 2 deletions(-)
>
> diff --git a/NEWS b/NEWS
> index ef274d1a42..d4739d93c6 100644
> --- a/NEWS
> +++ b/NEWS
> @@ -9,7 +9,10 @@ Version 2.37
>
> Major new features:
>
> - [Add new features here]
Suggest:
* The getent tool now supports the --no-addrconfig option. The
output of getent with --no-addrconfig may contain addresses
of families not configured on the current host i.e. as-if you
had not passed AI_ADDRCONFIG to getaddrinfo calls. This flag
is primarily intended for diagnostic purposes.
I think the use for diagnostics should be called out.
> +* The getent tool now supports the --no-addrconfig option. When
> + present, getent no longer passes AI_ADDRCONFIG to the getaddrinfo
> + function, and the output may contain addresses of families not
> + configured on the current host.
>
> Deprecated and removed features, and other changes affecting compatibility:
>
> diff --git a/nss/getent.c b/nss/getent.c
> index 8178b4b470..39a42e707d 100644
> --- a/nss/getent.c
> +++ b/nss/getent.c
> @@ -58,6 +58,8 @@ static const struct argp_option args_options[] =
> {
> { "service", 's', N_("CONFIG"), 0, N_("Service configuration to be used") },
> { "no-idn", 'i', NULL, 0, N_("disable IDN encoding") },
> + { "no-addrconfig", 'A', NULL, 0,
> + N_("disable AI_ADDRCONFIG (for ahosts*)") },
Suggest a more user-center textual description:
"disable filtering using host address configuration (for ahosts*)"
It's a bit of a mouthfull.
> { NULL, 0, NULL, 0, NULL },
> };
>
> @@ -79,6 +81,9 @@ static struct argp argp =
> /* Additional getaddrinfo flags for IDN encoding. */
> static int idn_flags = AI_IDN | AI_CANONIDN;
>
> +/* Set to 0 by --no-addrconfig. */
> +static int addrconfig_flags = AI_ADDRCONFIG;
> +
OK.
> /* Print the version information. */
> static void
> print_version (FILE *stream, struct argp_state *state)
> @@ -346,7 +351,7 @@ ahosts_keys_int (int af, int xflags, int number, char *key[])
>
> struct addrinfo hint;
> memset (&hint, '\0', sizeof (hint));
> - hint.ai_flags = (AI_V4MAPPED | AI_ADDRCONFIG | AI_CANONNAME
> + hint.ai_flags = (AI_V4MAPPED | addrconfig_flags | AI_CANONNAME
> | idn_flags | xflags);
OK.
> hint.ai_family = af;
>
> @@ -905,6 +910,10 @@ parse_option (int key, char *arg, struct argp_state *state)
> idn_flags = 0;
> break;
>
> + case 'A':
> + addrconfig_flags = 0;
> + break;
OK.
> +
> default:
> return ARGP_ERR_UNKNOWN;
> }
> --
> 2.37.2
>
>
next prev parent reply other threads:[~2022-09-14 22:34 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-13 14:35 [PATCH 0/2] Fix nss/tst-nss-files-hosts-long on single-stack hosts (bug 24816) Florian Weimer
2022-09-13 14:35 ` [PATCH 1/2] nss: Implement --no-addrconfig option for getent Florian Weimer
2022-09-14 22:34 ` Carlos O'Donell [this message]
2022-09-15 12:11 ` Florian Weimer
2022-09-13 14:35 ` [PATCH 2/2] nss: Fix tst-nss-files-hosts-long on single-stack hosts (bug 24816) Florian Weimer
2022-09-14 22:35 ` Carlos O'Donell
2022-09-14 9:42 ` [PATCH 0/2] Fix nss/tst-nss-files-hosts-long " Carlos O'Donell
2022-09-14 9:54 ` Florian Weimer
2022-09-14 22:26 ` Carlos O'Donell
2022-09-15 12:37 ` Florian Weimer
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