Please, anybody could help me in this my issue? Thanks! Norberto Goes
Em dom, 9 de dez de 2018 às 19:18, Norberto R. de Goes Jr. < [email protected]> escreveu: > Hi, how are you? > > I have been used the LWIP library for several years already. > Now I developed a new application that exchange larger packets, like 2K > bytes. > > Commits in use (SHA-1) : > - lwip : d70d9bf8660827e2919d5fc9c9469532196225e1 > - lwip-contrib: 4e553f7b3d3af4ac1f3f6c70f38371e4395fdccd > > To simulate my real scenario and you can try to reproduce the problem I > am facing, I have made alterations in the "simhost.c", "lwipopts.h" and > "tcpecho.c" from lwip-contrib. The ethernet data for teh netif is provided > by a socket-raw driver (Linux). The tcpecho just consume the data, no > reply (no echo). The "simhost" (server) is generated with the own Makefile > associated avaliable in the "lwip-contrib" git. > > In addition, I wrote a small "client" (use the TCP-IP/Linux stack). > When the "client" sends small packets, all works fine. But when it sends > larger packets (for instance, 2048 bytes), just the first are sent fast > (normal) but just after the locking occurs. > > Summary: > a) 02 Oracle VMBox (VM#1 and #2) - Linux host > > b) Sequence to run: > - VM#1 (server): > > sudo your_path1/simhost > - VM#2 (client): > > your_path2/client ip_netif port size_data > - example: > ./client 10.0.2.121 5124 2065 /* block */ > - example: > ./client 10.0.2.121 5124 1000 /* no block */ > > c) Altered files (from lwip-contrib), attacheds: > - .../apps/tcpecho/tcpecho.c > - .../ports/unix/proj/unixsim/lwipopts.h > - .../ ports/unix/proj/unixsim/simhost.c > > d) Client app (attacheds files) > > Just to compare, when I use another server with TCP-IP/Linux, not LWIP > stack, but the same attached client, no problem found, including larger > packets. > > Please, what I am doing or configuring wrong ? > Thank you very much. > > > -- > Norberto R. de Goes Jr. > CPqD - DRC > Tel.: +55 19 3705-4241 / Fax: +55 19 3705-6125 > [email protected] <[email protected]> > www.cpqd.com.br > > > -- Norberto R. de Goes Jr. CPqD - DRC Tel.: +55 19 3705-4241 / Fax: +55 19 3705-6125 [email protected] <[email protected]> www.cpqd.com.br
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