Subject: Re: [PATCH] sctp: reset flowi4_oif parameter on route lookup

From: Xufeng Zhang <[email-masked]>
Date: Fri, 25 Apr 2014 16:49:20 +0800

On 04/25/2014 03:57 PM, Julian Anastasov wrote:
> 	Hello,
>
> On Fri, 25 Apr 2014, Xufeng Zhang wrote:
>
>    
>>
>> diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
>> index c09757f..f8a5968 100644
>> --- a/net/sctp/protocol.c
>> +++ b/net/sctp/protocol.c
>> @@ -493,6 +493,10 @@ static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
>>   		    (AF_INET == laddr->a.sa.sa_family)) {
>>   			fl4->saddr = laddr->a.v4.sin_addr.s_addr;
>>   			fl4->fl4_sport = laddr->a.v4.sin_port;
>> +			/* Reset flowi4_oif so that it won't be incorrectly used
>> +			 * as input parameter to routing lookups.
>> +			 */
>> +			fl4->flowi4_oif = 0;
>>      
> 	May be something like this is more correct:
>
> 			flowi4_update_output(fl4,
> 					     asoc->base.sk->sk_bound_dev_if,
> 					     RT_CONN_FLAGS(asoc->base.sk),
> 					     daddr->v4.sin_addr.s_addr,
> 					     laddr->a.v4.sin_addr.s_addr);
>    

Thanks! you are right, I should use the available API.
I'll send V2 later.

Thanks,
Xufeng

>    
>>   			rt = ip_route_output_key(sock_net(sk), fl4);
>>   			if (!IS_ERR(rt)) {
>>   				dst =&rt->dst;
>>      
> Regards
>
> --
> Julian Anastasov<[email-masked]>
>
>