[lwip-users] Re: [lwip] ip_output() calls pbuf_free() ??

[Martin Glunz]

address@hidden wrote:
> 
> Hello,
> 
> Why does ip_output() pbuf_free() the given packet if  there was no route
> available?
> 
> Isn't the user responsible for pbuf_free()??
> 
I think so. Double freeing of a pbuf with PBUF_FLAG_ROM seems to
trigger memp_sanity() in memp.c. So if one tries to send packets
without a route available and lwip is compiled with LWIP_DEBUG,
this might occur.

BTW:
there's a bug in mem_sanity:

if(c < 0)
  abort();

should be

if(c < 0)
  return 0;


Martin Glunz
[This message was sent through the lwip discussion list.]