[YBA] When does write to UDP socket block?

[Shawn]

hey Shachar,

2012/3/7 Shachar Shemesh <shachar at shemesh.biz>:
> On 03/07/2012 07:27 AM, Jonathan Ben Avraham wrote:
>
> Hi linux-il colleagues,
> In >= 2.6.31 are there any conditions under which a write to a connected UDP
> socket can block? e.g. some change in routing or iface config after connect
> and before write?
udp socket doesn't need to use connect() but instead of sendto()

> Has anyone encountered a concrete exampe of a write to a
> UDP socket that blocks? See test code below. That is, I am trying to
> demonstrate that I can get to a situation where UDP write in fact does
> block.
>
You might be interested in some sample code of tcp/udp socket:
https://github.com/citypw/SCFE/tree/master/networking/userspace_socket

>         if (0 > (rc = connect(sd, (const struct sockaddr*)&serveraddr,
> sizeof(serveraddr)))) {
>                 printf("connect failed [%m]");
>                 exit(1);
>         }
>
I think you have written a tcp socket program. Am I right?





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regards
Shawn