linux-kernel - Re: [PATCH v2] ipv4/raw: support binding to nonlocal addresses

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Date:   Thu, 4 Nov 2021 09:59:20 -0600
From:   David Ahern <dsahern@...il.com>
To:     Riccardo Paolo Bestetti <pbl@...tov.io>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>,
        Shuah Khan <shuah@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v2] ipv4/raw: support binding to nonlocal addresses

On 11/2/21 8:19 AM, Riccardo Paolo Bestetti wrote:
> Add support to inet v4 raw sockets for binding to nonlocal addresses
> through the IP_FREEBIND and IP_TRANSPARENT socket options, as well as
> the ipv4.ip_nonlocal_bind kernel parameter.
> 
> Add helper function to inet_sock.h to check for bind address validity on
> the base of the address type and whether nonlocal address are enabled
> for the socket via any of the sockopts/sysctl, deduplicating checks in
> ipv4/ping.c, ipv4/af_inet.c, ipv6/af_inet6.c (for mapped v4->v6
> addresses), and ipv4/raw.c.
> 
> Add test cases with IP[V6]_FREEBIND verifying that both v4 and v6 raw
> sockets support binding to nonlocal addresses after the change. Add
> necessary support for the test cases to nettest.
> 
> Signed-off-by: Riccardo Paolo Bestetti <pbl@...tov.io>
> ---

Reviewed-by: David Ahern <dsahern@...nel.org>