Hi, I meet one unexpected disconnect on recv function.
I have one test case and repeat it to test stability: 1. create one socket and connect to server. 2. data exchange with server. 3. close socket. After several runs, it failed on recv function. I get the debug log like below: -------------------------------------- test run : 155 lwip_socket(PF_INET, SOCK_STREAM, 0) = 0 lwip_connect(0, addr=10.0.2.23 port=10000) lwip_connect(0) succeeded lwip_send(0, data=2002a938, size=17, flags=0x0) lwip_send(0) err=0 written=17 lwip_recvfrom(0, 2003b9f8, 9, 0x0, ..) lwip_recvfrom: top while sock->lastdata=0 lwip_recvfrom: netconn_recv err=0, netbuf=2000f3cc lwip_recvfrom: buflen=9 len=9 off=0 sock->lastoffset=0 lwip_recvfrom(0): addr=10.0.2.23 port=10000 len=9 lwip_recvfrom: deleting netbuf=2000f3cc lwip_recvfrom(0, 2003b9f8, 40, 0x0, ..) lwip_recvfrom: top while sock->lastdata=0 lwip_recvfrom: netconn_recv err=0, netbuf=2000ebac lwip_recvfrom: buflen=40 len=40 off=0 sock->lastoffset=0 lwip_recvfrom(0): addr=10.0.2.23 port=10000 len=40 lwip_recvfrom: deleting netbuf=2000ebac lwip_send(0, data=2002a908, size=40, flags=0x0) lwip_send(0) err=0 written=40 lwip_send(0, data=2002a908, size=40, flags=0x0) lwip_send(0) err=0 written=40 lwip_recvfrom(0, 2003b9f8, 40, 0x0, ..) lwip_recvfrom: top while sock->lastdata=0 lwip_recvfrom: netconn_recv err=0, netbuf=2000e79c lwip_recvfrom: buflen=40 len=40 off=0 sock->lastoffset=0 lwip_recvfrom(0): addr=10.0.2.23 port=10000 len=40 lwip_recvfrom: deleting netbuf=2000e79c lwip_close(0) test run : 156 lwip_socket(PF_INET, SOCK_STREAM, 0) = 0 lwip_connect(0, addr=10.0.2.23 port=10000) lwip_connect(0) succeeded lwip_send(0, data=2002a938, size=17, flags=0x0) lwip_send(0) err=0 written=17 lwip_recvfrom(0, 2003b9f8, 9, 0x0, ..) lwip_recvfrom: top while sock->lastdata=0 lwip_recvfrom: netconn_recv err=-13, netbuf=0 <-- error log lwip_recvfrom(0): buf == NULL, error is "Not connected."! <-- socket still here lwip_close(0) -------------------------------------- The error number is -13 (ERR_CONN). I have no idea about the reason, I check the socket is still exists , not clear at all. Does anyone have some suggestion for me? BTW, I work on TM4C platform with free rtos. thanks Gavin -- View this message in context: http://lwip.100.n7.nabble.com/unexpected-error-on-recv-function-via-socket-tp23842.html Sent from the lwip-users mailing list archive at Nabble.com. _______________________________________________ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users
