Re: [lwip-users] RAW LWIP TCP Client

[Noam Weissman]

Hi Student,

1. Maybe if you will first describe what you want to do we may help you more. I did not understand?

2. I am a bit on the dark how you want to change the HTTP server without knowing the basics?

From the little you wrote I am not sure that the HTTP server is the code you need to start with.

The HTTP server is designed to accept a request, parse it, send some data back and CLOSE the

connection. This is the basics but it does much more. Therefore it may not be the base code to

start with you own project.

If you need a server that gets a connection, stays open and be able to send back some data

every time you click a button, you need to check other examples.

BR,

Noam.

---

From: lwip-users <lwip-users-bounces+address@hidden> on behalf of emseahays <address@hidden>
Sent: Saturday, March 18, 2017 10:17 AM
To: address@hidden
Subject: [lwip-users] RAW LWIP TCP Client

 

I'm an EE Student working on a project involving modification of example code
for Raw LWIP HTTP Server. I can repeatedly send the same packet when I reset
the board because it sets up one TCP connection and sends one packet.
However, since I've modified it to perform this same type of behavior on a
btn press (rather than reset btn), it is able to send 4 packets, then I
don't get the 2nd receive event (from the server closing the connection).

I've been informed by a knowing person that I'm supposed to create a State
machine to keep track of the pcb state. Is that true? I just want to send
one packet per tcp connection. I wait until the server closes to call
tcp_close() but it seems there might be a timing issue because I receive
some acks late.

Using the LWIP_DEBUG functionality with the TCP_Options enabled, I have the
log for the 4 tcp connections from the 4 btn presses.

I am including a link to the file showing the log. I have a very basic
understanding of TCP and internet stuff, so I marked it up to try to find
patterns.

Can someone look at my log and tell me what they think?

Do I need to use the poll() event? I also don't do anything in my
errorHandler. Should I? Do I need a state machine to keep track of a single
tcp_pcb?

link to log is below(filename: TCP Debug Feature.mht).

http://s000.tinyupload.com/?file_id=06484156254841729160

TinyUpload.com - best file hosting solution, with no limits, totaly free

s000.tinyupload.com

TinyUpload.com - solution for tiny file hosting. No download limits, no upload limit. Totaly free.

--
View this message in context: http://lwip.100.n7.nabble.com/RAW-LWIP-TCP-Client-tp29090.html

lwip-users - RAW LWIP TCP Client

lwip.100.n7.nabble.com

RAW LWIP TCP Client. I'm an EE Student working on a project involving modification of example code for Raw LWIP HTTP Server. I can repeatedly send the same packet when I reset the board because it sets...

Sent from the lwip-users mailing list archive at Nabble.com.

_______________________________________________
lwip-users mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/lwip-users

lwip-users -- Mailing list for lwIP users - lists.nongnu.org

lists.nongnu.org

Welcome to the lwip-users mailing list. Use it to ask questions, share your experience and discuss new ideas. To see the collection of prior postings to the list ...