Hello, I am working on a bare metal project using NO_SYS=1 implementing a simple HTTP client request to a remote web server. The responses from the web server (Apache+PHP) are either a custom HTTP error code such as 601, 701, etc. which have a specific meaning or 200 (standard HTTP OK response) in which case a file approximately 10MiB in size is returned by the web server.
When the response is one of the error conditions and it fits within a single TCP packet (TCP_MSS is 536) then everything works as expected and the receive callback function registered with tcp_recv() is called only once. If the server sends the HTTP OK response, the receive callback function only gets called three times before lwIP starts to generate multiple errors along the following lines: Received 00000001 packets Received HTTP response code: 200 Assertion "pbuf_free: p->ref > 0" failed at line 691 in net/lwIP/src/core/pbuf.c Assertion "pbuf_free: p->ref > 0" failed at line 691 in net/lwIP/src/core/pbuf.c Received 00000002 packets Assertion "memp_malloc: memp properly aligned" failed at line 436 in net/lwIP/src/core/memp.c Assertion "pbuf_alloc: pbuf q->payload properly aligned" failed at line 296 in net/lwIP/src/core/pbuf.c Assertion "memp_free: mem properly aligned" failed at line 467 in net/lwIP/src/core/memp.c Assertion "memp_malloc: memp properly aligned" failed at line 436 in net/lwIP/src/core/memp.c Assertion "pbuf_alloc: pbuf q->payload properly aligned" failed at line 296 in net/lwIP/src/core/pbuf.c Assertion "memp_free: mem properly aligned" failed at line 467 in net/lwIP/src/core/memp.c Received 00000003 packets Assertion "memp_malloc: memp properly aligned" failed at line 436 in net/lwIP/src/core/memp.c Assertion "pbuf_alloc: pbuf q->payload properly aligned" failed at line 296 in net/lwIP/src/core/pbuf.c Looking at the network traffic then I can see the three TCP packets and they are correct in that they contain the HTTP response headers and the first part of the file being transmitted. Am I correct in assuming that the receive callback should get called filesize/TCP_MSS times? Other than leaving the lopp running that calls sys_check_timeouts() is there something I have missed? TIA. Andy. _______________________________________________ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users
