script examples monitoring TCP packets examples of SystemTap scripts monitoring TCP packets monitoring TCP packets examples of SystemTap scripts TCP packets, monitoring examples of SystemTap scripts TCP packets, monitoring examples of SystemTap scripts This section illustrates how to monitor TCP packets received by the system. This is useful in analyzing network traffic generated by applications running on the system. While is running, it will print out the following information about any received TCP packets in real time: Source and destination IP address (saddr, daddr, respectively) Source and destination ports (sport, dport, respectively) Packet flags To determine the flags used by the packet, uses the following functions: urg - urgent ack - acknowledgement psh - push rst - reset syn - synchronize fin - finished The aforementioned functions return 1 or 0 to specify whether the packet uses the corresponding flag. ----------------------------------------------------------------- Source IP Dest IP SPort DPort U A P R S F ----------------------------------------------------------------- 209.85.229.147 10.0.2.15 80 20373 0 1 1 0 0 0 92.122.126.240 10.0.2.15 80 53214 0 1 0 0 1 0 92.122.126.240 10.0.2.15 80 53214 0 1 0 0 0 0 209.85.229.118 10.0.2.15 80 63433 0 1 0 0 1 0 209.85.229.118 10.0.2.15 80 63433 0 1 0 0 0 0 209.85.229.147 10.0.2.15 80 21141 0 1 1 0 0 0 209.85.229.147 10.0.2.15 80 21141 0 1 1 0 0 0 209.85.229.147 10.0.2.15 80 21141 0 1 1 0 0 0 209.85.229.147 10.0.2.15 80 21141 0 1 1 0 0 0 209.85.229.147 10.0.2.15 80 21141 0 1 1 0 0 0 209.85.229.118 10.0.2.15 80 63433 0 1 1 0 0 0 [...]