| Server IP : 216.250.13.251 / Your IP : 216.73.216.164 Web Server : nginx/1.24.0 System : Linux gunay 6.8.0-134-generic #134-Ubuntu SMP PREEMPT_DYNAMIC Fri Jun 26 18:43:11 UTC 2026 x86_64 User : root ( 0) PHP Version : 7.4.33 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : OFF Directory : /proc/thread-self/root/usr/share/doc/bpfcc-tools/examples/tracing/ |
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Demonstrations of undump.py, the Linux eBPF/bcc version. This example trace the kernel function performing receive AP_UNIX socket packet. Some example output: Terminal 1, UNIX Socket Server: ``` $ nc -lU /var/tmp/dsocket # receive from Client Hello, World abcdefg ``` Terminal 2, UNIX socket Client: ``` $ nc -U /var/tmp/dsocket # Input some lines Hello, World abcdefg ``` Terminal 3, receive tracing: ``` $ sudo python undump.py -p 49264 Tracing PID=49264 UNIX socket packets ... Hit Ctrl-C to end # Here print bytes of receive PID 49264 Recv 13 bytes 48 65 6c 6c 6f 2c 20 57 6f 72 6c 64 0a PID 49264 Recv 8 bytes 61 62 63 64 65 66 67 0a ``` This output shows two packet received by PID 49264(nc -lU /var/tmp/dsocket), `Hello, World` will be parsed as `48 65 6c 6c 6f 2c 20 57 6f 72 6c 64 0a`, the `0a` is `Enter`. `abcdefg` will be parsed as `61 62 63 64 65 66 67 0a`.