[zeromq-dev] czmq and beacon ...

[Pieter Hintjens]

It looks like your app is subscribing to beacons without sending any out?

You may change line 739 from:

    if (is_valid && self->noecho) {

to

    if (is_valid && self->noecho && self->transmit) {

I'll make this change, the code was unsafe.

-Pieter

On Thu, Sep 5, 2013 at 12:31 AM, itlists at schrievkrom.de
<itlists at schrievkrom.de> wrote:
> Am 04.09.2013 21:38, schrieb Pieter Hintjens:
>> Can you find where it's crashing, i.e. run under a debugger and get a
>> stack trace?
>>
>>
> I compiled it against 3.2.3 with debugging symbols. The code crashes in
> zbeacon.c Ln739,
> because self-transmit is NULL.
>
>
>
>      //  If valid, check for echoed beacons (i.e. our own broadcast)
>      if (is_valid && self->noecho) {
>          byte  *transmit_data = zframe_data (self->transmit);
>          size_t transmit_size = zframe_size (self->transmit);
>          if (size == transmit_size && memcmp (buffer, transmit_data,
> transmit_size) == 0)
>              is_valid = false;
>      }
>
>       msvcr100d.dll!_wassert(const wchar_t * expr=0x697d9b94, const
> wchar_t * filename=0x697d9b6c, unsigned int lineno=220)  Line 325 C
>       czmq.dll!zframe_data(_zframe_t * self=0x00000000)  Line 220 + 0x1d
> bytes    C++
>  >    czmq.dll!s_beacon_recv(agent_t * self=0x0c39b1b0)  Line 735 + 0xc
> bytes    C++
>       czmq.dll!s_agent_task(void * args=0x00000000, _zctx_t *
> ctx=0x0c39a428, void * pipe=0x0c39ac68)  Line 415 + 0x9 bytes    C++
>       czmq.dll!s_thread_shim(void * args=0x0c397d80)  Line 112 + 0x1e
> bytes    C++
>       msvcr100d.dll!_callthreadstartex()  Line 314 + 0xf bytes    C
>       msvcr100d.dll!_threadstartex(void * ptd=0x0c289440)  Line 297    C
>       kernel32.dll!766333aa()
>       [Frames below may be incorrect and/or missing, no symbols loaded
> for kernel32.dll]
>       ntdll.dll!77279f72()
>       ntdll.dll!77279f45()
>
> _______________________________________________
> zeromq-dev mailing list
> zeromq-dev at lists.zeromq.org
> http://lists.zeromq.org/mailman/listinfo/zeromq-dev