You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
38 lines
1.8 KiB
38 lines
1.8 KiB
Demonstrations of tcptracer, the Linux eBPF/bcc version.
|
|
|
|
|
|
This tool traces the kernel function performing TCP connections (eg, via a
|
|
connect() or accept() syscalls) and closing them (explicitly or if the process
|
|
dies). Some example output (IP addresses are fake):
|
|
|
|
```
|
|
# ./tcptracer
|
|
Tracing TCP established connections. Ctrl-C to end.
|
|
T PID COMM IP SADDR DADDR SPORT DPORT
|
|
C 28943 telnet 4 192.168.1.2 192.168.1.1 59306 23
|
|
C 28818 curl 6 [::1] [::1] 55758 80
|
|
X 28943 telnet 4 192.168.1.2 192.168.1.1 59306 23
|
|
A 28817 nc 6 [::1] [::1] 80 55758
|
|
X 28818 curl 6 [::1] [::1] 55758 80
|
|
X 28817 nc 6 [::1] [::1] 80 55758
|
|
A 28978 nc 4 10.202.210.1 10.202.109.12 8080 59160
|
|
X 28978 nc 4 10.202.210.1 10.202.109.12 8080 59160
|
|
```
|
|
|
|
This output shows three conections, one outgoing from a "telnet" process, one
|
|
outgoing from "curl" to a local netcat, and one incoming received by the "nc"
|
|
process. The output details show the kind of event (C for connection, X for
|
|
close and A for accept), PID, IP version, source address, destination address,
|
|
source port and destination port.
|
|
|
|
The -t option prints a timestamp column:
|
|
|
|
```
|
|
# ./tcptracer -t
|
|
Tracing TCP established connections. Ctrl-C to end.
|
|
TIME(s) T PID COMM IP SADDR DADDR SPORT DPORT
|
|
0.000 C 31002 telnet 4 192.168.1.2 192.168.1.1 42590 23
|
|
3.546 C 748 curl 6 [::1] [::1] 42592 80
|
|
4.294 X 31002 telnet 4 192.168.1.2 192.168.1.1 42590 23
|
|
```
|