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new bash bunny networking wierdness


raf
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Hi,

I just got a bash bunny. I'm using macos, and initially I
could connect via serial in arming mode (switch 3) and I
could connect via ethernet (switch 1).

I did an apt-get update/upgrade, ran into the problem
with systemctl not knowing about procps, fixed that
thanks to this forum, but after that, ethernet no
longer worked (with the default switch 1 payload.txt:
ATTACKMODE ECM_ETHERNET STORAGE).

I've just looked at the doco again and noticed that it
says (for macos) to use RNDIS_ETHERNET (not
ECM_ETHERNET) which would mean that the default switch
2 payload.txt was the right one: ATTACKMODE
RNDIS_ETHERNET STORAGE

So that's confusing me. It looks like I did the wrong
thing but it worked anyway (or maybe the doco is
wrong?).

Anyway, when I try switch 1, macos now reports that the
RNDIS gadget has a self-assigned IP and when I try
switch 2, it says that the RNDIS device is not
connected. So that makes me think that ECM_ETHERNET is
better on macos than RNDIS_ETHERNET.

The self-assigned IP is because dhcp isn't working and
I think the dhcp server isn't working because of a
problem with usb0 but I can't seem to find the error
message that mentioned usb0 anymore. Anyway, here's
what I can find from arming mode (where I can still
connect via serial):

  # systemctl --failed
    UNIT                    LOAD   ACTIVE SUB    DESCRIPTION
   isc-dhcp-server.service loaded failed failed LSB: DHCP server
 
  LOAD   = Reflects whether the unit definition was properly loaded.
  ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
  SUB    = The low-level unit activation state, values depend on unit type.
 
  1 loaded units listed. Pass --all to see loaded but inactive units, too.
  To show all installed unit files use 'systemctl list-unit-files'.
 
  # systemctl status isc-dhcp-server
  ● isc-dhcp-server.service - LSB: DHCP server
     Loaded: loaded (/etc/init.d/isc-dhcp-server)
     Active: failed (Result: exit-code) since Thu 1970-01-01 00:00:13 UTC; 1min 31s ago
    Process: 244 ExecStart=/etc/init.d/isc-dhcp-server start (code=exited, status=1/FAILURE)
 
  Jan 01 00:00:11 bunny dhcpd[266]:
  Jan 01 00:00:11 bunny dhcpd[266]: No subnet declaration for usb0 (no IPv4 a...).
  Jan 01 00:00:11 bunny dhcpd[266]: ** Ignoring requests on usb0.  If this is...at
  Jan 01 00:00:11 bunny dhcpd[266]: you want, please write a subnet declaration
  Jan 01 00:00:11 bunny dhcpd[266]: in your dhcpd.conf file for the network s...nt
  Jan 01 00:00:13 bunny isc-dhcp-server[244]: Starting ISC DHCP server: dhcpdc...!
  Jan 01 00:00:13 bunny isc-dhcp-server[244]: failed!
  Jan 01 00:00:13 bunny systemd[1]: isc-dhcp-server.service: control process ...=1
  Jan 01 00:00:13 bunny systemd[1]: Failed to start LSB: DHCP server.
  Jan 01 00:00:13 bunny systemd[1]: Unit isc-dhcp-server.service entered fail...e.
 
  # dmesg
  [    9.031393] usb open backing file: /dev/nandf, 0xd3c55e00
  [    9.031572] g_ether gadget: Mass Storage Function, version: 2009/09/11
  [    9.031586] g_ether gadget: Number of LUNs=1
  [    9.031603]  lun0: LUN: removable file: /dev/nandf
  [    9.031636] gadget_is_softwinner_otg is not -int
  [    9.031645] gadget_is_softwinner_otg is not -int
  [    9.031668] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
  [    9.031693] g_ether gadget: g_ether ready
  [    9.262859] g_ether gadget: high-speed config #2: CDC Ethernet (ECM)
 
  # ifconfig -a
  eth0      Link encap:Ethernet  HWaddr 7a:9c:df:7a:46:2a  
            BROADCAST MULTICAST  MTU:1500  Metric:1
            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:1000
            RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
            Interrupt:114
 
  gre0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
            NOARP  MTU:1476  Metric:1
            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0
            RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
 
  ip6tnl0   Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
            NOARP  MTU:1452  Metric:1
            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0
            RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
 
  lo        Link encap:Local Loopback  
            inet addr:127.0.0.1  Mask:255.0.0.0
            inet6 addr: ::1/128 Scope:Host
            UP LOOPBACK RUNNING  MTU:16436  Metric:1
            RX packets:8 errors:0 dropped:0 overruns:0 frame:0
            TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0
            RX bytes:520 (520.0 B)  TX bytes:520 (520.0 B)
 
  sit0      Link encap:IPv6-in-IPv4  
            NOARP  MTU:1480  Metric:1
            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0
            RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
 
  tunl0     Link encap:IPIP Tunnel  HWaddr   
            NOARP  MTU:1480  Metric:1
            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0
            RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

I changed the switch 1 payload.txt to "ATTACKMODE
ECM_ETHERNET SERIAL" so I could access it via the
serial port while it was trying to get ethernet
working. This is what I see now:

  # dmesg
  [    8.533890] usb0: MAC 5a:00:00:5a:5a:00
  [    8.533907] usb0: HOST MAC 00:11:22:33:44:55
  [    8.534006] gadget_is_softwinner_otg is not -int
  [    8.534016] gadget_is_softwinner_otg is not -int
  [    8.534043] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
  [    8.534069] g_ether gadget: g_ether ready
  [    8.761748] g_ether gadget: high-speed config #2: CDC Ethernet (ECM)
  [    8.862089] ADDRCONF(NETDEV_UP): usb0: link is not ready
  [    9.118930] ADDRCONF(NETDEV_CHANGE): usb0: link becomes ready
  [   19.470040] usb0: no IPv6 routers present

  # ifconfig
  [...]
  usb0      Link encap:Ethernet  HWaddr 5a:00:00:5a:5a:00  
            inet addr:172.16.64.1  Bcast:172.16.64.255  Mask:255.255.255.0
            inet6 addr: fe80::5800:ff:fe5a:5a00/64 Scope:Link
            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
            RX packets:113 errors:0 dropped:0 overruns:0 frame:0
            TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:1000
            RX bytes:37528 (36.6 KiB)  TX bytes:720 (720.0 B)

So it now has a usb0 network interface, with the right address,
but from macos it still sees a self-assined address.

Ah, but I can do systemctl start isc-dhcp-server and it succeeds,
and from macos, it says the RNDIS gadget is "Connected" and has
the right address, but it still doesn't work. apr-get update says:

  Err http://httpredir.debian.org jessie/main armhf Packages
    504  Gateway Time-out
  W: Failed to fetch http://httpredir.debian.org/debian/dists/jessie/main/binary-armhf/Packages 504  Gateway Time-out

Any idea what I've done wrong or what I can do to
get ethernet working again?

I tried rebooting and isc-dhcp-server failed again, starting
it manually worked and everything looks ok but network connectivity
still isn't working.

This is wierd. From the macos host, I can ssh root@172.16.64.1
and it works, but only after I've done a manual:

  systemctl start isc-dhcp-server

from my serial port login.

But from the bunny, I can't do:

  apt-get update

So the networking is only working in one direction.

Any idea what's going on? This is wierd.

Thanks for any advice.

cheers,
raf

 

 

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