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    <p>When sending information using sockets three ways used:</p> <p>1)fixed size message (we will use it, plus assuming we are writing on the same machine byteorder match).Simply, like we will send 100 bytes and on receive we will read 100bytes</p> <p>2)message.len + message.( first we send message len then message itself. used for binary send receive mostly)</p> <p>3)marker method (mostly used sending text messages or commands. for exampling marking with \n newline)</p> <p>Next coming on representing our data (serialize). It is easy with c cause on c we can directly write our object and retrieve it without additional efforts.Object will be the same as in memory.</p> <pre><code>// PNUMBER_THREE structAddr; send(socket_id, structAddr, sizeof(NUMBER_THREE), 0); </code></pre> <p>or </p> <pre><code> write(socket_id, structAddr, sizeof(NUMBER_THREE)); </code></pre> <p>or safer</p> <pre><code>write_socket(socket_id, structAddr, sizeof(NUMBER_THREE)); //It is safer to do so though we are using blocking mode int write_socket(int fd,const char *buf,int len){ int currentsize=0; while(currentsize&lt;len){ int count=write(fd,buf+currentsize,len-currentsize); if(count&lt;0) return -1; currentsize+=count; } return currentsize; } </code></pre> <p>when reading we will be using <strong>the same structure</strong> plus it must meet condition <code>sizeof(NUMBER_THREE)==SizeInsideClient //SizeInsideClient is sizeof on client SizeInsideClient=sizeof(NUMBER_THREE)</code></p> <pre><code> //SizeInsideClient structure size on client program assert(sizeof(NUMBER_THREE)==SizeInsideClient); readblock(socket_id,structAddr,sizeof(NUMBER_THREE)); int readblock(int fd, char* buffer, int len) { int ret = 0; int count = 0; while (count &lt; len) { ret = read(fd, buffer + count, len - count); if (ret &lt;= 0) { return (-1); } count += ret; } return count; } </code></pre>
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    1. POSending a structure from client to server in TCP/IP socket
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    1. COJust one simple call to send/write does not necessarily do the job. Please closely read the related man-pages with respect to sockets.
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    2. COThis is the fast and ugly way with a list of caveats as long as your arm. If this is anything other than an experiment please find a way to marshal and un-marshal your data which embeds a little meta-data (and maybe some versioning information).
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    3. CO@qwr how can i receive that at the receiving end,(in the server side). can you please explain me, since i dont know how to serialize and deserialise the strcture data, can you show that by example.
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