Tcp Server and client synchronous

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I have a machine that is a handheld.
with this machine i can connect to TCP LAN and send and receive data to/from server

i have a function TCP_configuration() //configure the local ip , local port , subnetmask ...

TCP_server_configuration() //configure the server ip and server port

TCP_connect() //make a connection to the server

Send_data() //send a string to the server

all this code in pure C

i connected to the server very well

when i tried to send data the server receive only first and second characters and do not continue to receive the others and continue as i only send the two characters only

after some trying i found that i must send all data to the server from machine before call receive in the server to receive all data right

how can i solve this problem and make the server receive all data without modify the server ?

NOTE: connect / Disconnect / send data / configuring in the machine are made by AT commands

to Connect for example i send ATDT\r to COM2 on the machine

to send data i send the string to COM2 too

Posted 25-Dec-11 20:58pm

amertarekt

Updated 25-Dec-11 21:02pm

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Rajesh Anuhya · Accepted Answer · 2011-12-25T21:03:00

Solution 1

As per my understand you are using a GPRS Modem to send data to TCP server using AT commands. can you tell me modem details so that i can help you more.

Check with the AT command Document, for that your AT commands parameters are correct. debug the commands with HYPERTERMINAL , either your modem is sending more that 2 chars.

Posted 25-Dec-11 21:03pm

Rajesh Anuhya

Comments

amertarekt 26-Dec-11 3:15am

it is not GPRS modem

it is LAN modem on this machine it is called EZ-TCP external lan

i am sure the machine modem send all data because when i debug the server and wait on receive for the machine to send all data then call receive i receive all the data

amertarekt 26-Dec-11 5:58am

when i used Hyper terminal it work well

hyper terminal receive all the sent data

what is the problem now ?

Rajesh Anuhya 26-Dec-11 7:31am

What about your server??, is server receiving all the data which is sent by HYPERTERMINAL ???(more that 2 chars).???

amertarekt 26-Dec-11 8:09am

can you tell me first how to send a string using hyper terminal to a server

i connected to the server by hyperterminal but i tried to write some thing to send it send when i press the first character only

i tried my server by c# client and it worked well

Rajesh Anuhya 26-Dec-11 8:12am

First type data in the notepad, what do you want to send.., copy it, right click on the Hyper terminal window then select "Paste to Host" Option.

amertarekt 2-Jan-12 3:42am

i did it and solve the problem

when i used hyperterminal it receive all data sent to it and work fine

so the problem in the server do not wait to receive all things sent to it