[Buildroot] [PATCH] busybox: Enable domain search list support in udhcpc

[Yann E. MORIN <yann.morin.1998@free.fr>]

Alexey, All,

On 2019-04-08 14:00 +0300, Alexey Brodkin spake thusly:
> This is useful in networks with internal resources as it allows
> to use much shorter names.
> 
> E.g. instead of "server.internal.company.com" it's possible
> to use just "server" if DHCP server is configured with:
> ---------------------------->8-----------------------
> option domain-search "internal.company.com";
> ---------------------------->8-----------------------
> 
> This improvement consists of 2 parts:
> 
> 1. Enable handling of RFC3397 so DHCP client is ready for processing
>    corresponding data from DHCP server.
> 
> 2. Some DHCP servers always send out search list if it is set in server's
>    configuration and some servers only provide search list if client
>    asks for that (sending list of options it expectes to get).
> 
>    And exactly for those stubborn DHCP servers we need to add "-O search"
>    to udhcp's command line via CONFIG_IFUPDOWN_UDHCPC_CMD_OPTIONS.
> 
> Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
> Cc: Ignacy Gawedzki <ignacy.gawedzki@green-communications.fr>
> Cc: Peter Korsgaard <peter@korsgaard.com>

Acked-by: Yann E. MORIN <yann.morin.1998@free.fr>

Regards,
Yann E. MORIN.

> ---
>  package/busybox/busybox.config | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/package/busybox/busybox.config b/package/busybox/busybox.config
> index 1d9560d655..ab04854c83 100644
> --- a/package/busybox/busybox.config
> +++ b/package/busybox/busybox.config
> @@ -967,9 +967,9 @@ CONFIG_UDHCPC_DEFAULT_SCRIPT="/usr/share/udhcpc/default.script"
>  # CONFIG_FEATURE_UDHCP_PORT is not set
>  CONFIG_UDHCP_DEBUG=0
>  CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS=80
> -# CONFIG_FEATURE_UDHCP_RFC3397 is not set
> +CONFIG_FEATURE_UDHCP_RFC3397=y
>  CONFIG_FEATURE_UDHCP_8021Q=y
> -CONFIG_IFUPDOWN_UDHCPC_CMD_OPTIONS="-R -n"
> +CONFIG_IFUPDOWN_UDHCPC_CMD_OPTIONS="-R -n -O search"
>  
>  #
>  # Print Utilities
> -- 
> 2.16.2
> 
> _______________________________________________
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> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

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