What is sizeof(int) ?

 

Regards

 

Hugh

 

From: lwip-users-bounces+hugh=courtyard.co...@nongnu.org
[mailto:lwip-users-bounces+hugh=courtyard.co...@nongnu.org] On Behalf Of
Firedog I.
Sent: 05 December 2012 14:38
To: lwip-users@nongnu.org
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.

 

Example:

 

/*Connection to Client established…*/

int data = 0xFF; //or int data = 255;

tcp_write(pcb, data, 1, 1);

tcp_output(pcb);

 

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 “ÿ“ (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?

Thanks.

 

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