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Re: [lwip-users] UDP bind error due to address and port reuse
From: |
Surya Chaitanya |
Subject: |
Re: [lwip-users] UDP bind error due to address and port reuse |
Date: |
Sat, 3 Dec 2016 22:07:12 +0530 |
Hi,
The scenario is something like this. I have created an array of say, 5 UDP
PCB's.
I'd like to bind all these 5 UDP PCB's to the same local IP address and port
number
combination. Isn't this posible? Like you said, if we cannot bind an IP:Port
more
than one time, what is the purpose of SO_REUSE and SOF_REUSEADDR flags? Aren't
they
for reusing a particular port:IP combination for several PCBs at the same time?
Thank you.
Regards,
Surya
On Sat, 3 Dec 2016 12:56:52 +0000, Noam Weissman wrote
> Hi,
>
> If I understand you correctly you are trying to bind IP:port several times on
> the same machine
>
> without closing the previous bind ?
>
> This is not an option. You can bind UDP and TCP separately with two different
> pcb's one for
>
> TCP and one for UDP.
>
> You cannot bind an IP:Port more then one time. This is the meaning of binding.
>
> Its like a marriage between IP and a Port. Until you do not divorce you
> cannot
> marry again [UTF-8?][ð]
>
> BR,
>
> Noam.
>
> ________________________________
> From: lwip-users <address@hidden> on behalf of
> Surya Chaitanya <address@hidden>
Sent: Saturday, December 3, 2016 10:44 AM
> To: address@hidden
Subject: [lwip-users] UDP bind error due to address
> and port reuse
>
> Hi,
>
> I've been trying to use lwip to transfer UDP packets. In my situation, in the
> client
application, I would like to create 5 UDP PCBs having the same IP
> address and port
number. Inspite of setting the SO_REUSE flag to 1, and
> setting the SOF_REUSEADDR flag
to 1 for all the PCBs, the UDP bind error
> still persists. Could somebody pls. help me
out? Thank You.
>
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- [lwip-users] UDP bind error due to address and port reuse, Surya Chaitanya, 2016/12/03
- Re: [lwip-users] UDP bind error due to address and port reuse, Noam Weissman, 2016/12/03
- Re: [lwip-users] UDP bind error due to address and port reuse,
Surya Chaitanya <=
- Re: [lwip-users] UDP bind error due to address and port reuse, Surya Chaitanya, 2016/12/07
- Re: [lwip-users] UDP bind error due to address and port reuse, Noam Weissman, 2016/12/07
- Re: [lwip-users] UDP bind error due to address and port reuse, Surya Chaitanya, 2016/12/07
- Re: [lwip-users] UDP bind error due to address and port reuse, Dirk Ziegelmeier, 2016/12/07
- Re: [lwip-users] UDP bind error due to address and port reuse, Noam Weissman, 2016/12/07
- Re: [lwip-users] UDP bind error due to address and port reuse, Simon Goldschmidt, 2016/12/08
- Re: [lwip-users] UDP bind error due to address and port reuse, Noam Weissman, 2016/12/08
- Re: [lwip-users] UDP bind error due to address and port reuse, address@hidden, 2016/12/08
- Re: [lwip-users] UDP bind error due to address and port reuse, Surya Chaitanya, 2016/12/09