b04f7cea99
Investigation shows that 4.4 kernels take longer for loopback TCP packets to be ack'd, and results in extra ack packets to be generated in cases where both the server and client sockets send data packets at the same time. This was verified via TCPdump, where an extra ack packet was generated per run of the bidirectional transmissions in checkTcp(). This change verifies that the data + ack packets have been sent and counted before initiating the reverse transmission. Further, changes have been made to improve the reliability of this code via counting expected packets (rather than sleeps). Bug: 62994731 Test: CTS tests run (and passing) on walleye, marlin and angler Change-Id: I7c707ec3b11235a5a9cba10275aee40e2eb37169