topic LPC1788, LwIP, reassembly problem in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/LPC1788-LwIP-reassembly-problem/m-p/524776#M7412 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by FlySnake on Sun Jul 14 05:28:39 MST 2013</STRONG><BR /><SPAN>Hi, everyone</SPAN><BR /><SPAN>I've got a problem with LwIP (with lpcopen) and LPC1788 </SPAN><BR /><BR /><TABLE border="1"><TBODY><TR><TD bgcolor="#cacaca"> <PRE> ping 192.168.1.99 -s 1473 PING 192.168.1.99 (192.168.1.99) 1473(1501) bytes of data. 1481 bytes from 192.168.1.99: icmp_req=1 ttl=255 time=1.02 ms From 192.168.1.99 icmp_seq=2 Frag reassembly time exceeded </PRE> </TD></TR></TBODY></TABLE><BR /><BR /><SPAN>With ICMP echo request of size below 1473 bytes - all is OK. But with 1473+ packet is fragmented on IP layer and it causes a problem. </SPAN><BR /><BR /><TABLE border="1"><TBODY><TR><TD bgcolor="#cacaca"> <PRE> mem_malloc: could not allocate 1552 bytes </PRE> </TD></TR></TBODY></TABLE><BR /><BR /><SPAN><SPAN>There is a mention about this problem </SPAN><A class="jive-link-external-small" href="https://community.nxp.com/external-link.jspa?url=http%3A%2F%2Fwww.lpcware.com%2Fcontent%2Fbugtrackerissue%2Flwiplpc-lpc17emac-driver-fault-exception-several-conditions" rel="nofollow noopener noreferrer" target="_blank">http://www.lpcware.com/content/bugtrackerissue/lwiplpc-lpc17emac-driver-fault-exception-several-conditions</A><SPAN> but the suggested code didn't help and it seems like nobody cares about this bug.</SPAN></SPAN><BR /><SPAN><SPAN>The port from </SPAN><A class="jive-link-external-small" href="https://community.nxp.com/external-link.jspa?url=http%3A%2F%2Fwww.freertos.org%2FFreeRTOS-Plus%2FFreeRTOS_Plus_IO%2FDemo_Applications%2FLPCXpresso_LPC1769%2FNXP_LPC1769_Demo_Description.shtml" rel="nofollow noopener noreferrer" target="_blank">http://www.freertos.org/FreeRTOS-Plus/FreeRTOS_Plus_IO/Demo_Applications/LPCXpresso_LPC1769/NXP_LPC1769_Demo_Description.shtml</A><SPAN> works fine.</SPAN></SPAN></BODY></HTML> Wed, 15 Jun 2016 18:09:47 GMT lpcware 2016-06-15T18:09:47Z LPC1788, LwIP, reassembly problem https://community.nxp.com/t5/LPC-Microcontrollers/LPC1788-LwIP-reassembly-problem/m-p/524776#M7412 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by FlySnake on Sun Jul 14 05:28:39 MST 2013</STRONG><BR /><SPAN>Hi, everyone</SPAN><BR /><SPAN>I've got a problem with LwIP (with lpcopen) and LPC1788 </SPAN><BR /><BR /><TABLE border="1"><TBODY><TR><TD bgcolor="#cacaca"> <PRE> ping 192.168.1.99 -s 1473 PING 192.168.1.99 (192.168.1.99) 1473(1501) bytes of data. 1481 bytes from 192.168.1.99: icmp_req=1 ttl=255 time=1.02 ms From 192.168.1.99 icmp_seq=2 Frag reassembly time exceeded </PRE> </TD></TR></TBODY></TABLE><BR /><BR /><SPAN>With ICMP echo request of size below 1473 bytes - all is OK. But with 1473+ packet is fragmented on IP layer and it causes a problem. </SPAN><BR /><BR /><TABLE border="1"><TBODY><TR><TD bgcolor="#cacaca"> <PRE> mem_malloc: could not allocate 1552 bytes </PRE> </TD></TR></TBODY></TABLE><BR /><BR /><SPAN><SPAN>There is a mention about this problem </SPAN><A class="jive-link-external-small" href="https://community.nxp.com/external-link.jspa?url=http%3A%2F%2Fwww.lpcware.com%2Fcontent%2Fbugtrackerissue%2Flwiplpc-lpc17emac-driver-fault-exception-several-conditions" rel="nofollow noopener noreferrer" target="_blank">http://www.lpcware.com/content/bugtrackerissue/lwiplpc-lpc17emac-driver-fault-exception-several-conditions</A><SPAN> but the suggested code didn't help and it seems like nobody cares about this bug.</SPAN></SPAN><BR /><SPAN><SPAN>The port from </SPAN><A class="jive-link-external-small" href="https://community.nxp.com/external-link.jspa?url=http%3A%2F%2Fwww.freertos.org%2FFreeRTOS-Plus%2FFreeRTOS_Plus_IO%2FDemo_Applications%2FLPCXpresso_LPC1769%2FNXP_LPC1769_Demo_Description.shtml" rel="nofollow noopener noreferrer" target="_blank">http://www.freertos.org/FreeRTOS-Plus/FreeRTOS_Plus_IO/Demo_Applications/LPCXpresso_LPC1769/NXP_LPC1769_Demo_Description.shtml</A><SPAN> works fine.</SPAN></SPAN></BODY></HTML> Wed, 15 Jun 2016 18:09:47 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC1788-LwIP-reassembly-problem/m-p/524776#M7412 lpcware 2016-06-15T18:09:47Z