local address is null sending msg #1000 sending msg #2000 sending msg #3000 sending msg #4000 sending msg #5000 sending msg #6000 sending msg #7000 sending msg #8000 sending msg #9000 PASS: received msg #1000 PASS: received msg #2000 PASS: received msg #3000 PASS: received msg #4000 PASS: received msg #5000 PASS: received msg #6000 PASS: received msg #7000 PASS: received msg #8000 PASS: received msg #9000 Messages sent: 10000, messages received: 10000