I know this is not the answer you'd expect, but I have to warn you that
there is currently no active developer using the PPP part of lwIP, so
you might have to rely on answers of other users on this list. As
always, new developers caring about PPP are welcome to take part and
improve it!
Simon
Letschi wrote:
Hello!
I am using PPP over a serial interface to communicate with a
GSM-Modem. This works fine, but I have the following problem: After
closing the PPP connection and reestablishing the connection, my
application crashes because pbuf_alloc returns NULL. The number of
reconnects the application “survives” depends on the define MEM_SIZE
(size of reserved heap memory). My application only uses one
pbuf_malloc-call:
Int SendUdpMsg (udp_pcb *pUdpConn, void *pBuff, int nLength )
{
struct pbuf* packet;
char * data;
packet=(struct pbuf *)pbuf_alloc(PBUF_TRANSPORT, nLength, PBUF_RAM);
Assert( packet != NULL );
data=(char*)packet->payload;
memcpy(data, pBuff, nLength );
udp_send(pUdpConn, packet);
pbuf_free( packet );
return nLength;
}
As you can see I free the allocated memory directly after sending, so
I don’t really know who is wasting my mem? Anyone an idea?`
Best regards,
Letschi
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