AFAIK, wireshark is the best Linux tool for analyzing network traffic. Primarily intended for Ethernet networks, there is now also support for very different protocols (e.g. USB). Sadly, there is no support for fibre channel, most likely because there is even no infrastructure in the kernel.

I doubt I could write the complete stack within just one week. The result should be a clear plan of what needs to be done on each level and a proof-of-concept implementation of at least some parts.

Looking for hackers with the skills:

fibrechannel wireshark networking analysis kernel

This project is part of:

Hack Week 13

Activity

  • over 9 years ago: mkubecek liked this project.
  • over 9 years ago: ptesarik added keyword "kernel" to this project.
  • over 9 years ago: ptesarik added keyword "fibrechannel" to this project.
  • over 9 years ago: ptesarik added keyword "wireshark" to this project.
  • over 9 years ago: ptesarik added keyword "networking" to this project.
  • over 9 years ago: ptesarik added keyword "analysis" to this project.
  • over 9 years ago: ptesarik started this project.
  • over 9 years ago: ptesarik originated this project.

  • Comments

    Be the first to comment!

    Similar Projects

    Remote control for Adam Audio active monitor speakers by dmach

    Description

    I own a pair of Adam Audio A7V active studio monitor speakers. They have ethernet connectors that allow changing their settings remotely using the A Control software. From Windows :-( I couldn't find any open source alternative for Linux besides AES70.js library.

    Goals

    • Create a command-line tool for controlling the speakers.
    • Python is the language of choice.
    • Implement only a simple tool with the desired functionality rather than a full coverage of AES70 standard.

    TODO

    • ✅ discover the device
    • ❌ get device manufacturer and model
    • ✅ get serial number
    • ✅ get description
    • ✅ set description
    • ✅ set mute
    • ✅ set sleep
    • ✅ set input (XRL (balanced), RCA (unbalanced))
    • ✅ set room adaptation
      • bass (1, 0, -1, -2)
      • desk (0, -1, -2)
      • presence (1, 0, -1)
      • treble (1, 0, -1)
    • ✅ set voicing (Pure, UNR, Ext)
    • ❌ the Ext voicing enables the following extended functionality:
      • gain
      • equalizer bands
      • on/off
      • type
      • freq
      • q
      • gain
    • ❌ udev rules to sleep/wakeup the speakers together with the sound card

    Resources

    • https://www.adam-audio.com/en/a-series/a7v/
    • https://www.adam-audio.com/en/technology/a-control-remote-software/
    • https://github.com/DeutscheSoft/AES70.js
    • https://www.aes.org/publications/standards/search.cfm?docID=101 - paid
    • https://www.aes.org/standards/webinars/AESStandardsWebinarSC0212L20220531.pdf
    • https://ocaalliance.github.io/downloads/AES143%20Network%20track%20NA10%20-%20AES70%20Controller.pdf

    Result


    Improve UML page fault handler by ptesarik

    Description

    Improve UML handling of segmentation faults in kernel mode. Although such page faults are generally caused by a kernel bug, it is annoying if they cause an infinite loop, or panic the kernel. More importantly, a robust implementation allows to write KUnit tests for various guard pages, preventing potential kernel self-protection regressions.

    Goals

    Convert the UML page fault handler to use oops_* helpers, go through a few review rounds and finally get my patch series merged in 6.14.

    Resources

    Wrong initial attempt: https://lore.kernel.org/lkml/20231215121431.680-1-petrtesarik@huaweicloud.com/T/


    early stage kdump support by mbrugger

    Project Description

    When we experience a early boot crash, we are not able to analyze the kernel dump, as user-space wasn't able to load the crash system. The idea is to make the crash system compiled into the host kernel (think of initramfs) so that we can create a kernel dump really early in the boot process.

    Goal for the Hackweeks

    1. Investigate if this is possible and the implications it would have (done in HW21)
    2. Hack up a PoC (done in HW22 and HW23)
    3. Prepare RFC series (giving it's only one week, we are entering wishful thinking territory here).

    update HW23

    • I was able to include the crash kernel into the kernel Image.
    • I'll need to find a way to load that from init/main.c:start_kernel() probably after kcsan_init()
    • I workaround for a smoke test was to hack kexec_file_load() systemcall which has two problems:
      1. My initramfs in the porduction kernel does not have a new enough kexec version, that's not a blocker but where the week ended
      2. As the crash kernel is part of init.data it will be already stale once I can call kexec_file_load() from user-space.

    The solution is probably to rewrite the POC so that the invocation can be done from init.text (that's my theory) but I'm not sure if I can reuse the kexec infrastructure in the kernel from there, which I rely on heavily.

    update HW24

    • Day1
      • rebased on v6.12 with no problems others then me breaking the config
      • setting up a new compilation and qemu/virtme env
      • getting desperate as nothing works that used to work
    • Day 2
      • getting to call the invocation of loading the early kernel from __init after kcsan_init()
    • Day 3

      • fix problem of memdup not being able to alloc so much memory... use 64K page sizes for now
      • code refactoring
      • I'm now able to load the crash kernel
      • When using virtme I can boot into the crash kernel, also it doesn't boot completely (major milestone!), crash in elfcorehdr_read_notes()
    • Day 4

      • crash systems crashes (no pun intended) in copy_old_mempage() link; will need to understand elfcorehdr...
      • call path vmcore_init() -> parse_crash_elf_headers() -> elfcorehdr_read() -> read_from_oldmem() -> copy_oldmem_page() -> copy_to_iter()
    • Day 5

      • hacking arch/arm64/kernel/crash_dump.c:copy_old_mempage() to see if crash system really starts. It does.
      • fun fact: retested with more reserved memory and with UEFI FW, host kernel crashes in init but directly starts the crash kernel, so it works (somehow) \o/
    • TODOs

      • fix elfcorehdr so that we actually can make use of all this...
      • test where in the boot __init() chain we can/should call kexec_early_dump()


    Kill DMA and DMA32 memory zones by ptesarik

    Description

    Provide a better allocator for DMA-capable buffers, making the DMA and DMA32 zones obsolete.

    Goals

    Make a PoC kernel which can boot a x86 VM and a Raspberry Pi (because early RPi4 boards have some of the weirdest DMA constraints).

    Resources

    • LPC2024 talk:
    • video:


    Modularization and Modernization of cifs.ko for Enhanced SMB Protocol Support by hcarvalho

    Creator:
    Enzo Matsumiya ematsumiya@suse.de @ SUSE Samba team
    Members:
    Henrique Carvalho henrique.carvalho@suse.com @ SUSE Samba team

    Description

    Split cifs.ko in 2 separate modules; one for SMB 1.0 and 2.0.x, and another for SMB 2.1, 3.0, and 3.1.1.

    Goals

    Primary

    Start phasing out/deprecation of older SMB versions

    Secondary

    • Clean up of the code (with focus on the newer versions)
    • Update cifs-utils
    • Update documentation
    • Improve backport workflow (see below)

    Technical details

    Ideas for the implementation.

    • fs/smb/client/{old,new}.c to generate the respective modules
      • Maybe don't create separate folders? (re-evaluate as things progresses!)
    • Remove server->{ops,vals} if possible
    • Clean up fs_context.* -- merge duplicate options into one, handle them in userspace utils
    • Reduce code in smb2pdu.c -- tons of functions with very similar init/setup -> send/recv -> handle/free flow
    • Restructure multichannel
      • Treat initial connection as "channel 0" regardless of multichannel enabled/negotiated status, proceed with extra channels accordingly
      • Extra channel just point to "channel 0" as the primary server, no need to allocate an extra TCPServerInfo for each one
    • Authentication mechanisms
      • Modernize algorithms (references: himmelblau, IAKERB/Local KDC, SCRAM, oauth2 (Azure), etc.


    Hacking on sched_ext by flonnegren

    Description

    Sched_ext upstream has some interesting issues open for grabs:

    Goals

    Send patches to sched_ext upstream

    Also set up perfetto to trace some of the example schedulers.

    Resources

    https://github.com/sched-ext/scx