|Starting with Avi Vantage release 18.2.5, the function avi.vs.read has been renamed as avi.l4.read.
Reads the payload from the socket buffers and returns stream of bytes.
This API is a must to read the payload and operate on it.
The number of bytes that can be read cannot exceed 65000. This API can be used in conjunction with `avi.l4.collect`. If enough number of bytes are not present in the socket, the API will error out.
|Number of bytes
|Returns the payload after L4 (TCP/UDP) as stream of bytes