3 ms·

Show HN: JS-emulated Linux with network support, everyone on one subnet

26 points by benjamincburns 13y ago

benjamincburns 13y ago
Everyone is also running a telnet server by default, and nmap is installed on the image. Have fun, but please try to be nice ;-). Edit: If this looks familiar, this is the jor1k OpenRISC emulator which Sebastian Macke built and submitted around a month ago. Most of the credit for this still goes to him. I just added the emulated ethernet controller, as well as the network backend (virtual switch/router) which acts as the LAN on which the demo is running. For more info, I've written a blog post here: http://www.benjamincburns.com/2013/11/10/jor1k-ethmac-support.html http://www.benjamincburns.com/2013/11/10/jor1k-ethmac-suppor...
- s-macke 13y ago
  Try to start the emulator two times and to login to the other emulation via telnet. If you login via ssh, you can even start an encrypted chatting session. I am wondering if this is more safe than Cryptocat :)
songgao 13y ago
where's my '-b' flag in `ping`!
- benjamincburns 13y ago
  busybox... sorry... Also I'd obviously really prefer to not have a bunch of broadcast traffic.
  - songgao 13y ago
    Good job anyway! Unicast ping doesn't work here either. Are there too many people connected right now?
    - benjamincburns 13y ago
      Someone was just sending some pretty gnarly flooding traffic a few minutes ago, I had to "gently remove" them from the situation. It should be better now, but you'll need to refresh the page. Right now there are about 100 hosts connected, but a minute ago there were about 140. It ebbs and flows. More ebb at the moment since I think we're no longer on the front page.
      - asiekierka 13y ago
        You're on location 5. Prepare for liftoff.
        benjamincburns 13y ago
        Yes, but not any more. Strange...
coldcode 13y ago
Amazing what you can do with JS these days. If you could run another vm on top of it you could get interesting screenshots of an emulated OS running on an emulated OS in a browser.
- s-macke 13y ago
  Yeah I was thinking of X86 -> Windows 8 -> Firefox -> Javascript VM -> OpenRISC Emulator -> Linux -> Dosbox -> Windows 3.11 -> C64 Emulator -> Basic -> Z-Machine -> Zork Oh man, I am real nerd.
angersock 13y ago
Erm...we don't seem to have DHCP working. :(
- benjamincburns 13y ago
  All I can say is try again. I've been monitoring things throughout the day and improving the stability as I go. It still seems to clam up every now and then, however. Part of the problem is that the backend wasn't really the focus for this, so I kind of just hacked it together. It hasn't been standing up as well to the constant churning load as I thought it would. In the future I intend to remove VDE2, and do all of the switching in my websocket server with the aid of something like rabbitmq. I may also decide to write it all in go instead of Python as well.
  - angersock 13y ago
    Thanks for your efforts! I run ifconfig and don't see any IP having been assigned--and we don't seem to have dhclient installed I was going to host a webpage using netcat: http://www.howtoforge.com/useful-uses-of-netcat http://www.howtoforge.com/useful-uses-of-netcat
    - benjamincburns 13y ago
      udhcpc is installed. I'm having some problems with the websocket relay shutting down at the moment. Working on a different (cleaner) version as we speak.
    - benjamincburns 13y ago
      If you were to try now, it seems that things are behaving much more reliably...
      - angersock 13y ago
        10.5.130.140:80 :) NOTE: Ack, is not responding to ping anymore... :(

Everyone is also running a telnet server by default, and nmap is installed on the image. Have fun, but please try to be nice ;-). Edit: If this looks familiar, this is the jor1k OpenRISC emulator which Sebastian Macke built and submitted around a month ago. Most of the credit for this still goes to him. I just added the emulated ethernet controller, as well as the network backend (virtual switch/router) which acts as the LAN on which the demo is running. For more info, I've written a blog post here: http://www.benjamincburns.com/2013/11/10/jor1k-ethmac-support.html http://www.benjamincburns.com/2013/11/10/jor1k-ethmac-suppor...

s-macke 13y ago
Try to start the emulator two times and to login to the other emulation via telnet. If you login via ssh, you can even start an encrypted chatting session. I am wondering if this is more safe than Cryptocat :)

songgao 13y ago

where's my '-b' flag in `ping`!

benjamincburns 13y ago
busybox... sorry... Also I'd obviously really prefer to not have a bunch of broadcast traffic.
- songgao 13y ago
  Good job anyway! Unicast ping doesn't work here either. Are there too many people connected right now?
  - benjamincburns 13y ago
    Someone was just sending some pretty gnarly flooding traffic a few minutes ago, I had to "gently remove" them from the situation. It should be better now, but you'll need to refresh the page. Right now there are about 100 hosts connected, but a minute ago there were about 140. It ebbs and flows. More ebb at the moment since I think we're no longer on the front page.
    - asiekierka 13y ago
      You're on location 5. Prepare for liftoff.
      - benjamincburns 13y ago
        Yes, but not any more. Strange...

coldcode 13y ago

Amazing what you can do with JS these days. If you could run another vm on top of it you could get interesting screenshots of an emulated OS running on an emulated OS in a browser.

s-macke 13y ago
Yeah I was thinking of X86 -> Windows 8 -> Firefox -> Javascript VM -> OpenRISC Emulator -> Linux -> Dosbox -> Windows 3.11 -> C64 Emulator -> Basic -> Z-Machine -> Zork Oh man, I am real nerd.

angersock 13y ago

Erm...we don't seem to have DHCP working. :(

benjamincburns 13y ago
All I can say is try again. I've been monitoring things throughout the day and improving the stability as I go. It still seems to clam up every now and then, however. Part of the problem is that the backend wasn't really the focus for this, so I kind of just hacked it together. It hasn't been standing up as well to the constant churning load as I thought it would. In the future I intend to remove VDE2, and do all of the switching in my websocket server with the aid of something like rabbitmq. I may also decide to write it all in go instead of Python as well.
- angersock 13y ago
  Thanks for your efforts! I run ifconfig and don't see any IP having been assigned--and we don't seem to have dhclient installed I was going to host a webpage using netcat: http://www.howtoforge.com/useful-uses-of-netcat http://www.howtoforge.com/useful-uses-of-netcat
  - benjamincburns 13y ago
    udhcpc is installed. I'm having some problems with the websocket relay shutting down at the moment. Working on a different (cleaner) version as we speak.
  - benjamincburns 13y ago
    If you were to try now, it seems that things are behaving much more reliably...
    - angersock 13y ago
      10.5.130.140:80 :) NOTE: Ack, is not responding to ping anymore... :(