IPSP bluetooth sample with QEMU (ping fails)



While testing bluetooth IPSP sample (recent master branch of zephyr) with Qemu, ping fails (no response found) and 

ping: sendmsg: No buffer space available (wireshark capture attached).

I noticed that there are some old issues and bugs reported on the IPSP sample. However, I couldn't figure out if the bugs/issues have been resolved already.

What is the current status on the IPSP bluetooth sample? Anyone tested IPSP sample with Qemu?

I get the following for the IPSP test:

zephyr/samples/bluetooth/ipsp$ make BOARD=qemu_x86 CONF_FILE=prj_dbg.conf run

[QEMU] CPU: qemu32
qemu-system-i386: warning: Unknown firmware file in legacy mode: genroms/multiboot.bin

[bt] [INF] show_dev_info: Identity: 00:aa:01:00:00:23 (public)
[bt] [INF] show_dev_info: HCI: version 5.0 (0x09) revision 0x0000, manufacturer 0x003f
[bt] [INF] show_dev_info: LMP: version 5.0 (0x09) subver 0x0000
[ipsp] [INF] init_app: Run IPSP sample
[ipsp] [INF] listen: Starting to wait

On host PC


I enabled 6lowpan and bluetooth_6lowpan

# modprobe bluetooth_6lowpan
# modprobe 6lowpan                  
# echo 1 > /sys/kernel/debug/bluetooth/6lowpan_enable
# echo connect "00:aa:01:00:00:23 1" > /sys/kernel/debug/bluetooth/6lowpan_control

$ sudo hcitool lescan
[sudo] password for nxf32661:
LE Scan ...
00:AA:01:00:00:23 (unknown)
00:AA:01:00:00:23 Test IPSP node

$ sudo ./echo-client -i bt0 2001:db8::1
Binding to 2001:db8::2
Timeout while waiting idx 0 len 1
Timeout while waiting idx 1 len 6
Timeout while waiting idx 2 len 4
Timeout while waiting idx 3 len 26
Timeout while waiting idx 4 len 1232
Timeout while waiting idx 5 len 1
Timeout while waiting idx 6 len 256

$ ping6 -I bt0 2001:db8::1
PING 2001:db8::1(2001:db8::1) from 2001:db8::2 bt0: 56 data bytes
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available

$ ifconfig bt0
bt0       Link encap:UNSPEC  HWaddr 00-AA-01-FF-FE-01-00-24-00-00-00-00-00-00-00-00  
          inet6 addr: fe80::2aa:1ff:fe01:24/64 Scope:Link
          inet6 addr: 2001:db8::2/64 Scope:Global
          RX packets:76 errors:0 dropped:0 overruns:0 frame:0
          TX packets:91 errors:0 dropped:91 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:7128 (7.1 KB)  TX bytes:8532 (8.5 KB)


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