When I create a try to socket.recv() from a NETLINK_ROUTE socket if I don't recv ALL the data available, it seems the data not recv'd is lost.
For example:
>>> import socket
>>> sock = socket.socket(socket.AF_NETLINK, socket.SOCK_DGRAM, socket.NETLINK_ROUTE)
>>> sock.bind((0,0))
>>> sock.send('\24\0\0\0\22\0\1\3\23\0364O\0\0\0\0\21\0\0\0') # struct nlmsghdr
20
>>> sock.recv(10000)
'\xe4\x03\x00\x00 ... ' (+3000 more bytes)
If I sock.recv(100), it will return 100 bytes but the +2900 other bytes are gone. Doing another sock.recv() will return the next nlmsghdr (if a multi part message) or block waiting for data.
I can sock.recv(X, socket.MSG_PEEK) to read X bytes without data being lost; but when doing that the read data isn't pop'd out of the recv buffer of course.
I thought any data not read would remain in the buffer until read. What am I doing wrong? I'd rather not just 'guess' at how much data might be available...
