Re: [lwip-users] TCP Dup ACKs and TCP Window full
On 06.04.2018 15:30, Adrian Figueroa wrote: I am writing a bootloader application that receives data over ethernet for flashing the processor it runs on. This is implemented on an STM32F746 running the ChibiOS-RTOS and the HAL drivers that come with it. Consequently, the netconn-api is used. I run Lwip 1.4.1, because Lwip 2.X was not yet ported to ChibiOS and I cannot to do it myself. Lwip is used to implement a simple TCP server. A python TCP client connects to it and sends a chunk of data (around 200k). I moved Lwip pools and heap to external SDRAM, so I can store large amounts of packets without discarding them. First, the TCP server thread waits for an incoming connection with “netconn_accept()”. Find this in “server.c”, attached to this mail. There is also a “helper” thread that cleans things up after a connection was closed (dynamic threads). After “netconn_accept()”, the netconn is handed over to a thread that receives data. Find the receiver functionality in “receiver.c”. The receiver constantly calls netconn_recv(), until the connection is closed. A netbuf is filled each time and chained to the previous netbuf. I also have an evaluation thread that works on the received netbufs, but it does not do anything at the moment. In the end, I have a long netbuf chain in memory, ready for evaluation. The problem is that I lose some of the packets in the process. Find the dump from Wireshark attached. My lwipopts.h is also included in the mail. I chose very generous amounts of storage for all pools, because I have 32 MB of SDRAM available. I get no errors at all in lwip_stats. Do you have any suggestions? Are you aware that you seem to be using TCP segmentation offloading on your windows network card? The wireshark trace shows TCP segments with 5840 bytes although MSS is advertised as 1460 by lwIP. If you want (us) to debug network problems using wireshark, please ensure you change the driver settings to make wireshark let you see what's on the cable! Simon ___ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users
Re: [lwip-users] Guide/example on moving from IPv4 to IPv6?
On 06.04.2018 11:56, thomasfogh wrote: I'm currently running an IPv4-only socket application with DHCP on my STM32F407 board and need to switch to IPv6 only with SLAAC. I can't find any example code for an IPv6-only socket application. Can anyone point me in the right direction on how to migrate from IPv4 to IPv6? If you're relly using sockets as you said, this is not an lwIP specific question. Use google instead of this list. If you want to ask about lwIP specifics instead, please tell us what you want to know or study the win32 or unix port in contrib (where IPv6-only works). Simon ___ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users
Re: [lwip-users] Initialization problem upgrading from 1.4.1 to 2.0.3
On 05.04.2018 20:29, Keith Rubow wrote:
I am trying to use lwip on ARM cortex M4. My development software is
Atollic Truestudio on Win10. So far I have gotten lwip 1.4.1 to work
using raw api and a simple multitasking OS.
Now I am trying to change over to lwip 2.0.3, and am having trouble with
initialization. My initialization code is as follows:
#include "lwipopts.h"
#include "lwip/tcpip.h"
#include "lwip/tcp.h"
struct netif wiznetif; // network interface struct for wiznet
...
static void initialize_lwip(void) {
struct ip_addr ipaddr, netmask, gateway;
Since 1.4.0, "struct ip_addr" is an "internal" type, and applications
should use "ip_addr_t", which is a typedef and keeps us more free to
change the types. We do have struct ip_addr (Dirk suggested to add the
appropriate include), but I just saw it's only defined for dual-stack mode.
You should instead convert your software from "legacy" (i.e. pre 1.4.0)
coding style to just use ip_addr_t.
Simon
___
lwip-users mailing list
lwip-users@nongnu.org
https://lists.nongnu.org/mailman/listinfo/lwip-users
[lwip-users] Tunnel solution for HTTP server expose to Internet
My embedded device, running lwip httpd server, is under a router with a dynamic public IP address and a local private network 192.168.1.x. I know how to configure DDNS and NAT on the router to reach the server from outside, but these are tedious and tricky steps for most users. So I'm searching more "plug" solutions that would allow the end user to connect to my embedded device. I found yaler, pakekite and some others. They should work, but all solutions need the installation of a piece of software in the embedded HTTP server, in my case lwip-based. Do you have any experiences on implementing this protocols on lwip to expose httpd to Internet? Could you suggest any other better solutions? ___ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users
[lwip-users] Guide/example on moving from IPv4 to IPv6?
Hi, I'm currently running an IPv4-only socket application with DHCP on my STM32F407 board and need to switch to IPv6 only with SLAAC. I can't find any example code for an IPv6-only socket application. Can anyone point me in the right direction on how to migrate from IPv4 to IPv6? FYI: The current application is running FreeRTOS and uses mbedTLS to post data with HTTPS and also has a MQTT client running. /Thomas Fogh -- Sent from: http://lwip.100.n7.nabble.com/lwip-users-f3.html ___ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users
Re: [lwip-users] help with mDNS sending a DNS_RRTYPE_SRV query
antonio wrote: > The problem is the function that requires recursion (*mdns_readname*). The > error is related to */Stack Overflow/.. * So this is not related to threads? Then please describe the actual problem you see. I'm getting lost in all the other things you write... Simon ___ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users
