Mario, Thanks for the response, enclosed is my lwip options.
I have set up my GMAC (Ethernet peripheral) to use a non-cached section of ram due to DMA, however I have also disabled the cortex M7 data cache just in case. Disabling the data cache did not make a difference. I have noticed that the code appears to be more reliable when I have debug messages turned on (timing problem?). Here is a following terminal debug log output: ttpd.c 2804: http_accept 20456c0c / 0 httpd.c 2804: http_accept 20456b30 / 0 httpd.c 2647: http_poll: pcb=20456b30 hs=20451c14 pcb_state=ESTABLISHED httpd.c 2647: http_poll: pcb=20456c0c hs=20451a10 pcb_state=ESTABLISHED httpd.c 2647: http_poll: pcb=20456b30 hs=20451c14 pcb_state=ESTABLISHED httpd.c 2647: http_poll: pcb=20456c0c hs=20451a10 pcb_state=ESTABLISHED altcp_tls_mbedtls.c 283: mbedtls_ssl_handshake failed: -0x7780 httpd.c 2599: http_err: Connection closed., pcb: 20456c0c altcp_tls_mbedtls.c 283: mbedtls_ssl_handshake failed: -0x7780 httpd.c 2599: http_err: Connection closed., pcb: 20456b30 httpd.c 2804: http_accept 20456b5c / 0 httpd.c 2647: http_poll: pcb=20456b5c hs=20451a0c pcb_state=ESTABLISHED httpd.c 2804: http_accept 20456be0 / 0 httpd.c 2647: http_poll: pcb=20456b5c hs=20451a0c pcb_state=ESTABLISHED httpd.c 2647: http_poll: pcb=20456be0 hs=20451c10 pcb_state=ESTABLISHED httpd.c 2647: http_poll: pcb=20456b5c hs=20451a0c pcb_state=ESTABLISHED httpd.c 2647: http_poll: pcb=20456be0 hs=20451c10 pcb_state=ESTABLISHED httpd.c 2647: http_poll: pcb=20456b5c hs=20451a0c pcb_state=ESTABLISHED httpd.c 2669: http_poll: too many retries, close httpd.c 634: Closing connection 20456b5c, httpd.c 2647: http_poll: pcb=20456be0 hs=20451c10 pcb_state=ESTABLISHED httpd.c 2647: http_poll: pcb=20456be0 hs=20451c10 pcb_state=ESTABLISHED httpd.c 2669: http_poll: too many retries, close httpd.c 634: Closing connection 20456be0, As you see I am getting handshake failed, but not sure this is root cause as I get this when the website works too. I am thinking it could be a race condition bug, as that adding debug messages reduces error, but would have a hard time thinking that such a bug would have existed this long. Also I am running the code without an RTOS such that code for the most part runs atomically. Trampas On Tue, Feb 18, 2020 at 1:57 PM Mário Luzeiro <mrluze...@ua.pt> wrote: > Hi Trampas, > > I had an experience with lwip, mbedTLS and https (all using latest > versions from repositories) > It took a loooong time to me to make it (kinda) work. > > The problems I had (some similar than yours and lots of others) was a > combinations of multiple factors: > - MCU drivers bugs (on my case the ST DMA issue). > - MCU limited resources: use the faster options you can get for > encryption, limit the use of memory and allow TLS cache usage. > - Memory and parameter configurations: since browsers can fire 4 .. 8 > connections to get the page, you will need to allow all that connections to > be accepted. > - Parameter configurations: you will have to fine tune your parameters to > your use case and resources limitation. > > You will have to debug a lot, using webbrowser, wireshark and so on.. > until o find the best parameters for you. > What you are describing looks the browser can make the first connections > and then it cannot make new connections because there are no slots left. > > Mario > > ________________________________________ > From: lwip-users <lwip-users-bounces+mrluzeiro=ua...@nongnu.org> on > behalf of Trampas Stern <tram...@gmail.com> > Sent: 18 February 2020 18:40 > To: Mailing list for lwIP users > Subject: [lwip-users] https mbed TLS lwip > > I am having a problem with the lwip and mbed TLS. I find that usually > after reboot chrome can access my lwip https server and the first load of > the web page seems to work. If I refresh the website then it seems to fail > I have noticed in Chrome that I get the following errors: > > [image.png] > > Since the firmware usually works without a problem after reboot I assume > there is some sort of firmware bug (malloc not being free, etc). I have > not been able to nail down what the problem is. > > Anyone have any suggestions? > > Thanks > Trampas > _______________________________________________ > lwip-users mailing list > lwip-users@nongnu.org > https://lists.nongnu.org/mailman/listinfo/lwip-users
/** * \file * * \brief LwIP configuration. * * Copyright (c) 2013-2018 Microchip Technology Inc. and its subsidiaries. * * \asf_license_start * * \page License * * Subject to your compliance with these terms, you may use Microchip * software and any derivatives exclusively with Microchip products. * It is your responsibility to comply with third party license terms applicable * to your use of third party software (including open source software) that * may accompany Microchip software. * * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY, * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE. * * \asf_license_stop * */ #ifndef __LWIPOPTS_H__ #define __LWIPOPTS_H__ /* Include ethernet configuration first */ #include "conf_eth.h" #include "board.h" /* ----------------------------------------------- -------------- LwIP API Support --------------- ----------------------------------------------- */ #define LWIP_HTTPD_DYNAMIC_FILE_READ 1 #define HTTPD_ENABLE_HTTPS 1 #define LWIP_ALTCP_TLS 1 #define LWIP_ALTCP_TLS_MBEDTLS 1 #define LWIP_ALTCP 1 #define LWIP_HTTPD_SUPPORT_POST 1 #define PPP_SUPPORT 0 #define PPPOE_SUPPORT 0 #define SNMP_LWIP_MIB2 1 #define LWIP_SNMP 1 #define LWIP_SNMP_V3 1 #define MIB2_STATS 1 #define SNMP_USE_RAW 1 #define HTTPD_DEBUG LWIP_DBG_ON #define ALTCP_MBEDTLS_DEBUG LWIP_DBG_ON #define TCP_OUTPUT_DEBUG LWIP_DBG_ON | LWIP_DBG_LEVEL_SEVERE //#define DHCP_DEBUG LWIP_DBG_ON /** * NO_SYS==1: Provides VERY minimal functionality. Otherwise, * use lwIP facilities. * Uses Raw API only. */ #define NO_SYS 1 /** * LWIP_NETIF_STATUS_CALLBACK==1: Support a callback function whenever an interface * changes its up/down status (i.e., due to DHCP IP acquistion) */ #define LWIP_NETIF_STATUS_CALLBACK 1 /** * LWIP_RAW==1: Enable application layer to hook into the IP layer itself. * Used to implement custom transport protocol (!= than Raw API). */ #define LWIP_RAW 0 /** * SYS_LIGHTWEIGHT_PROT==1: if you want inter-task protection for certain * critical regions during buffer allocation, deallocation and memory * allocation and deallocation. */ #define SYS_LIGHTWEIGHT_PROT 0 /* These are not available when using "NO_SYS" */ #define LWIP_NETCONN 0 #define LWIP_SOCKET 0 /* Uncomment following line to use DHCP instead of fixed IP */ #define DHCP_USED /* ------------------------------------ ---------- Memory options ---------- ------------------------------------ */ /** * MEM_ALIGNMENT: should be set to the alignment of the CPU * 4 byte alignment -> #define MEM_ALIGNMENT 4 * 2 byte alignment -> #define MEM_ALIGNMENT 2 */ #define MEM_ALIGNMENT 4 /** * MEM_SIZE: the size of the heap memory. If the application will send * a lot of data that needs to be copied, this should be set high. */ #define MEM_SIZE 20 * 1024 /** * MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One * per active UDP "connection". * (requires the LWIP_UDP option) */ #define MEMP_NUM_UDP_PCB 2 /** * MEMP_NUM_TCP_PCB: the number of simulatenously active TCP connections. * (requires the LWIP_TCP option) */ #define MEMP_NUM_TCP_PCB 10 /** * MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP connections. * (requires the LWIP_TCP option) */ #define MEMP_NUM_TCP_PCB_LISTEN 4 /** * MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP segments. * (requires the LWIP_TCP option) */ #define MEMP_NUM_TCP_SEG 20 /** * MEMP_NUM_REASSDATA: the number of IP packets simultaneously queued for * reassembly (whole packets, not fragments!) */ #define MEMP_NUM_REASSDATA 2 /** * MEMP_NUM_FRAG_PBUF: the number of IP fragments simultaneously sent * (fragments, not whole packets!). * This is only used with IP_FRAG_USES_STATIC_BUF==0 and * LWIP_NETIF_TX_SINGLE_PBUF==0 and only has to be > 1 with DMA-enabled MACs * where the packet is not yet sent when netif->output returns. */ #define MEMP_NUM_FRAG_PBUF 6 /** * MEMP_NUM_PBUF: the number of memp struct pbufs (used for PBUF_ROM and PBUF_REF). * If the application sends a lot of data out of ROM (or other static memory), * this should be set high. */ #define MEMP_NUM_PBUF 4 /** * MEMP_NUM_NETBUF: the number of struct netbufs. * (only needed if you use the sequential API, like api_lib.c) */ #define MEMP_NUM_NETBUF 0 /** * MEMP_NUM_NETCONN: the number of struct netconns. * (only needed if you use the sequential API, like api_lib.c) */ #define MEMP_NUM_NETCONN 0 /** * PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */ #define PBUF_POOL_SIZE 7 /** * PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */ #define PBUF_POOL_BUFSIZE GMAC_FRAME_LENTGH_MAX /* ---------------------------------- ---------- DHCP options ---------- ---------------------------------- */ #if defined(DHCP_USED) /** * LWIP_DHCP==1: Enable DHCP module. */ #define LWIP_DHCP 1 #endif /* --------------------------------- ---------- UDP options ---------- --------------------------------- */ /** * LWIP_UDP==1: Turn on UDP. */ #define LWIP_UDP 1 /* --------------------------------- ---------- TCP options ---------- --------------------------------- */ /** * LWIP_TCP==1: Turn on TCP. */ #define LWIP_TCP 1 /** * TCP_MSS: The maximum segment size controls the maximum amount of * payload bytes per packet. For maximum throughput, set this as * high as possible for your network (i.e. 1460 bytes for standard * ethernet). * For the receive side, this MSS is advertised to the remote side * when opening a connection. For the transmit size, this MSS sets * an upper limit on the MSS advertised by the remote host. */ #define TCP_MSS 1460 /** * TCP_WND: The size of a TCP window. This must be at least * (2 * TCP_MSS) for things to work well */ #define TCP_WND (4 * TCP_MSS) /** * TCP_SND_BUF: TCP sender buffer space (bytes). * To achieve good performance, this should be at least 2 * TCP_MSS. */ #define TCP_SND_BUF (4 * TCP_MSS) /* ------------------------------------ ---------- Thread options ---------- ------------------------------------ */ /** The stack sizes allocated to the netif stack: (256 * 4) = 1048 bytes. */ #define netifINTERFACE_TASK_STACK_SIZE 256 /** The priority of the netif stack. */ #define netifINTERFACE_TASK_PRIORITY (tskIDLE_PRIORITY + 4) /** The stack sizes allocated to the TCPIP stack: (256 * 4) = 1048 bytes. */ #define TCPIP_THREAD_STACKSIZE 256 /** The priority of the TCPIP stack. */ #define TCPIP_THREAD_PRIO (tskIDLE_PRIORITY + 5) /** The mailbox size for the tcpip thread messages */ #define TCPIP_MBOX_SIZE 16 #define DEFAULT_ACCEPTMBOX_SIZE 16 #define DEFAULT_RAW_RECVMBOX_SIZE 16 #define DEFAULT_TCP_RECVMBOX_SIZE 16 /* ---------------------------------------- ---------- Statistics options ---------- ---------------------------------------- */ /** * LWIP_STATS==1: Enable statistics collection in lwip_stats. */ #define LWIP_STATS 1 /** * LWIP_STATS_DISPLAY==1: Compile in the statistics output functions. */ #define LWIP_STATS_DISPLAY 0 /** * LWIP_STATS_LARGE==1: Use 32 bits counter instead of 16. */ #define LWIP_STATS_LARGE 0 #if LWIP_STATS #define LINK_STATS 0 #define IP_STATS 0 #define IPFRAG_STATS 0 #define ICMP_STATS 0 #define IGMP_STATS 0 #define UDP_STATS 0 #define TCP_STATS 0 #define MEM_STATS 0 #define MEMP_STATS 0 #define SYS_STATS 0 #endif /* Left outside to avoid warning. */ #define ETHARP_STATS 0 /* --------------------------------------- ---------- Debugging options ---------- --------------------------------------- */ //#define LWIP_NOASSERT #define LWIP_DEBUG #define LWIP_DBG_MIN_LEVEL LWIP_DBG_LEVEL_ALL //#define LWIP_DBG_TYPES_ON LWIP_DBG_ON // \note For a list of all possible lwIP configurations, check http://lwip.wikia.com/wiki/Lwipopts.h #endif /* __LWIPOPTS_H__ */
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