I'm trying to get some C code going on an embedded board running FreeRTOS and using its TCP/IP stack to POST a very simple file to an Apache server running on my desktop.
I can pull a file from the Apache server to my board just fine, so I know the Apache server is running. 
I have attached a Wireshark screenshot of the HTTP POST packet that goes out from my embedded board. You can see the hex values of the exact message at the bottom.
I then send another TCP packet out with the twenty bytes of data. I have tried that and attaching those twenty bytes of data to the same packet the header is in. In both cases I get a couple of packets back from the desktop outlining the error. It tells me there a 404 error which I found on one site means:
HTTP/1.1 404 Not Found
The POST path of a command is incorrect.
The index.html file on the Apache server is in my /var/www/html/ directory. I created an incoming subdirectory and gave it full permissions for everyone.
drwxrwxrwx 2 root root 4096 Nov 19 10:07 incoming/ -rw-r--r-- 1 root root 174 Nov 11 22:20 index.html
So, I believe anyone should be able to post to that incoming address. As I request /index.html in the GET command, I believe the request:
POST /incoming/records.txt
Should be the correct path.
Is anyone able to advise on why this could be wrong please?
I guess it could be:
- An incorrect POST command
- An incorrect Apache setup
I suspect the reason the Apache server is resending its last packet is because I have not sent an ACK back when it sent me the 404 error. I will try to sort that out in parallel.
WFIW I am using Berkeley sockets in the stack to send and receive information.
Many thanks!