Optimized Receive Buffer on socket descriptor while select socket operation

The optimized way of receiving the data on the socket while doing select.

Scenario :


-- Do select on  "N" number of file descriptors,  based on the FD_ISSET do receive the packet buffer.

-- what happens when there are packets are in stream, (i.e) they are just yet to be copied to socket receive buffer by linux kernel.

-- Obviously after processing the packet, the control go back to select operation


-- Thus having more packets written to the  socket receive buffer during burst scenario, the socket buffer will get full and packets will be lost


-- The optimized approach is to, do  IOCTL call to that socket fd, and get the available receive buffer length  before doing receive packet buffer.

-- Its very optimistic way recently i have experienced this approach..


-- It works pretty cool..

--  you would need to add your code in kernel  soo_ioctl function.. get the struct socket  so_rcv.sb_cc -- i.e length of socket receive buffer