here i attached another file from wireshark. In this test packets are sent in serial port (read previouses posts) every 200ms and the problem doesn't happen.
i saw that when the parblom happens, wireshark capture packet with incorrect checksum.... but i don't know if it is related to the problem I hope these reports can help someone to understand Piero 2008/3/20, Piero 74 <[EMAIL PROTECTED]>: > > here i attached a wireshark file... > > I didn't understand what is the problem.... > Anyone can explain me?? > > my ip board is 192.168.0.101 > pc ip is 192.169.0.1 > > 2008/3/20, Piero 74 <[EMAIL PROTECTED]>: > > > > > > > > 2008/3/20, Piero 74 <[EMAIL PROTECTED]>: > > > > > > Ok... i will try to explain my test and the problem. > > > After i will post a network sniffer report. > > > > > > I have a simple pc application (client) which read packet from server > > > and show in a window. > > > > > > My application in board whit lwip works using two task: > > > - the first task get paccket from serial port, at 115200 baud; packet > > > has the delimiter, so, at the end of packet, this task send it on queue. > > > - the second task has a loop with a select on data received on socket, > > > with a timeout of 50 ms: when timeout expired, loop on queue, get the > > > packet > > > from queue and call socket function send, and loop again > > > > > > i did the test using very small packet (max 30 bytes), sending them on > > > uart every 100 ms > > > > > > After few packets, i saw lwip blocked: in particolar, the task which > > > manage socket is blocked, i suppose in send function. > > > I saw that in this case, tcpip thread (i suppose) is looping in > > > tcp_enqueue function, and in particolar i have: queuelen = > > > TCP_SND_QUEUELEN, > > > so, TCP_STATS_INC(tcp.memerr) is done. > > > > > > i'm seeing that code loop in after memerr label in this function... some > > goto memerr are called! > > > > i have options below this post. > > > > > > i'm doing other test, i will post some report. > > > > > > Piero > > > > > > > >
test2.pcap
Description: Binary data
_______________________________________________ lwip-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/lwip-users
