Fix a potential indefinite blocking in packetimpact testbench

1. setsockopt(SO_RCVTIMEO, 0) == never timeout
2. float64(time.Microsecond/time.Second) == 0
3. packetimpact tests use a lot of 1s timeouts

This becomes a more significant problem because of a recent change that binds
the sniffer only on the specific testNet interface so now the traffic on the
ctrlNet cannot wake up the blocking call anymore.

PiperOrigin-RevId: 344123465

0 files changed, 0 insertions, 0 deletions