extracting individual binaries from Optware packages?

Discussion in 'Tomato Firmware' started by luckman212, May 10, 2011.

  1. luckman212

    luckman212 LI Guru Member

    Hi all,
    so there are 2 packages that I really *need* on my tomato router (asus rt-n16 running Victek's excellent TomatoRAF mod).
    they are: tcpdump & snmpd

    I see that these are available in optware but I didn't want to do a full optware install because I don't want to attach any usb storage to the unit and want to minimize the jffs writes.

    so I found this guide on extracting .ipk packages (basically they are just renamed .tar.gz files) and I was able to download & extract the binaries, but they don't run. I put them in /jffs but when I try to execute them I get e.g. "-sh: ./tcpdump: not found". Yes I did chmod +x.

    any idea if this is possible to do? I was thinking this might be due to a bad transfer (ASCII vs binary) but I think I did it correctly (used WinSCP). Do I need special MIPSR2 versions? I see in the optware repo that there are many directories for various build types but I don't know which one to choose exactly. I chose the one at http://ipkg.nslu2-linux.org/feeds/optware/ddwrt/cross/stable/ because that was the one referenced in the TomatoUSB mod optware install guide.

    any ideas? thanks! :)
  2. TT76

    TT76 Networkin' Nut Member

    I think you didn't input a correct filename or a path. Maybe try /jffs/tcpdump.
  3. luckman212

    luckman212 LI Guru Member

    thanks, but no-- tcpdump is a file, not a directory in this case. I think I downloaded the wrong binary somehow. but not sure which one is correct for MIPS R2 devices like rt-n16.
  4. shibby20

    shibby20 Network Guru Member

    but tcpdump needs libpcap ;)

    btw all packages are compiled with prefix /opt. May not work from other path!

    I have idea:
    - mount /jffs as /opt and install optware, tcpdump etc
    - umount /opt and copy all from /jffs to /tmp/opt
    - then mount /tmp/opt as /opt and optware will work ;) You dont need usb storage and nothing will using flash memory. Optware will works in ram (rtn16 has lot of ram ;P ).
    - add to firewall script copying data from /jffs to /tmp and mount /opt after reboot.
  5. luckman212

    luckman212 LI Guru Member

    I gave up on this idea and just plugged in a usb drive and installed the "real" optware.
  6. shibby20

    shibby20 Network Guru Member

    and this is the best way :)
  7. prudy

    prudy Addicted to LI Member

    tcpdump uses:
    libpcap.so.1 => /opt/lib/libpcap.so.1 (0x2aabf000)
    libgcc_s.so.1 => /opt/lib/libgcc_s.so.1 (0x2ab03000)
    libc.so.0 => /opt/lib/libc.so.0 (0x2ab22000)
    ld-uClibc.so.0 => /opt/lib/ld-uClibc.so.0 (0x2aaa8000)

    so beside pcap the three others are needed. They come from uclibc-opt_0.9.28-13_mipsel.ipk that is installed by the optware script.
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