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

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Message-ID: <a8d9f99d-8aa8-3186-fcca-c0f7b7f37327@gmail.com>
Date:   Wed, 17 Nov 2021 20:59:16 -0700
From:   David Ahern <dsahern@...il.com>
To:     Riccardo Paolo Bestetti <pbl@...tov.io>,
        Denis Kirjanov <dkirjanov@...e.de>
Cc:     David Ahern <dsahern@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.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 11/17/21 5:14 PM, Riccardo Paolo Bestetti wrote:
>>> diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c
>>> index 1e44a43acfe2..e540b0dcf085 100644
>>> --- a/net/ipv4/ping.c
>>> +++ b/net/ipv4/ping.c
>>> @@ -311,15 +311,11 @@ static int ping_check_bind_addr(struct sock *sk, struct inet_sock *isk,
>>>   		pr_debug("ping_check_bind_addr(sk=%p,addr=%pI4,port=%d)\n",
>>>   			 sk, &addr->sin_addr.s_addr, ntohs(addr->sin_port));
>>>   
>>> -		if (addr->sin_addr.s_addr == htonl(INADDR_ANY))
>>> -			chk_addr_ret = RTN_LOCAL;
>>> -		else
>>> -			chk_addr_ret = inet_addr_type(net, addr->sin_addr.s_addr);
>>
>> That was done intentionally in commit 0ce779a9f501
>>
> 
> Should I remove this from the patch? Is there a particular reason why
> this was done in ping.c but not in the other places?
> 

exactly. I did not see the big deal about changing it.