forked from iovisor/bcc
-
Notifications
You must be signed in to change notification settings - Fork 2
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Create examples/tracing/undump.py examples text file (iovisor#3714)
Create examples/tracing/undump.py examples text file and update permission (+x) for undump.py.
- Loading branch information
Showing
3 changed files
with
40 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Empty file.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,39 @@ | ||
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`. |