[lwip-users] Interrupt missing while calling sendto()

[revathy]

Hi,
        I am working on BF533 EZ kit lite with lwip ported on it.
There iam facing one problem,
 
# My PDMA interrupt is affecting (missing) if i am using sendto()
in my project
# Here PDMA is used to capture data from Camera

But, one more things is, if iam using recvfrom() it is not so!

Is there is any special or complexity wise major difference 
between sendto() and recvfrom()?
 
Can anyone give more light on this?

Regards,
Revathy