[lwip-users] sendind tcp data and created pbuf's

[Martin Velek]

Hello,

I am using an emac driver which can handle only word sized(divisible
by 4) pbuf's except the last one in a pbuf chain.
Is possible that netconn_write can cause a multiple pbuf's without
divisible len?

E.g.
netconn_write (..., datalen = 111, ...)
netconn_write (..., datalen = 111, ...)
netconn_write (..., datalen = 111, ...)

will generate a packet in pbuf chain

pbuf (0) - len = eth + ip + tcp headers
pbuf (1) - len = 111
pbuf (2) - len = 111
...

Thank you

Martin Velek


#define TCP_WND                         2048
#define TCP_MSS                         128
#define TCP_SND_BUF                     256
#define TCP_SND_QUEUELEN                (4 * (TCP_SND_BUF)/(TCP_MSS))