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Re: [lwip-users] Sending out TCP-Data as integer type

From: Hugh Reynolds
Subject: Re: [lwip-users] Sending out TCP-Data as integer type
Date: Wed, 5 Dec 2012 21:05:57 -0000

What is sizeof(int) ?






From: address@hidden [mailto:address@hidden On Behalf Of Firedog I.
Sent: 05 December 2012 14:38
To: address@hidden
Subject: [lwip-users] Sending out TCP-Data as integer type


Hi everyone,


I got a little problem over here. I can send simple TCP-Data like string and char, but I can’t send data as integer type. I’m using lwIP v1.36 with RAW API.




/*Connection to Client established…*/

int data = "" //or int data = "">

tcp_write(pcb, data, 1, 1);



When sending this Packet out, I receive a “00” as data in Wireshark.


I’ve tried sending out the equal ASCII-char to 255, a “ΓΏ“ (see extended ASCII), and this one works. When sending out this char, Wireshark shows a TCP-Packet with 1 byte length and a "ff" as data. That’s exactly what I want, but I don’t want to convert integer vars into extended ascii and then send the converted data out.


Any suggestions how to solve the problem?



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