Thread: Server recv data problem! Please help!

Hello All!
I have a problem and I realy need help! I want to make my simple server recognize commands! The problem is that when I recive data from client I get garbage at the end of the data. For example I connect with telnet to my server and send message:

This is the first message

Server displays them like this:

This is the first message öÿ¿ ¨õÿ¿) @ @øÈõÿ¿

I simply store all the recived data into array buffer and this is the result of:

Code:

cout << buffer << endl;

I know that recv function returns size of the recived data, so I can make just a loop like this, to filter thous characters out:

Code:

for(int q=0; q<recv_data_size; q++){
    cout << buffer[q];
}

This will display me a data without thous garbage characters, but the problem for server to detect command!

I have my buffer 100 bytes long, so I clear thous garbage characters like this:

Code:

for(int c=recv_data_size-2; c<array_size; c++){
    buffer[c] = '\0';
}

I used recv_data_size-2 so that the code allso would clear \n and \r characters!

This will clean the garbage out and for example if I will send command from client stop, then my buffer will look like this:

[s],[t],[o].[p],[\0],[\0]....

The problem is that this code does't work:

Code:

if(buffer == "stop"){
   cout << "Command executed!\n";
}

Can you please show me how to make my server recognize commands?
Here is the source code. I'm on Linux:

Code:

#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <iostream>

#define port 1000
#define conn 10
#define buffsize 100


using namespace std;

int main(){

 	int sock_fd, fd;
 	struct sockaddr_in server;
 	struct sockaddr_in client;
	
 	socklen_t sin_size;

	char buffer[buffsize];
	
	server.sin_family = AF_INET;
        server.sin_port = htons(port);
	server.sin_addr.s_addr=INADDR_ANY;
	
	if((sock_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1){
 		perror("socket();");
 		exit(1);
	}
	
	
	if(bind(sock_fd,(struct sockaddr *)&server,sizeof(struct sockaddr)) == -1){
		perror("bind();");
		exit(1);
	}
	
	
	if(listen(sock_fd, conn) == -1){
		perror("listen();");
		exit(1);
	}
	
	sin_size = sizeof(struct sockaddr_in);
	
	while(true){
	
		fd = accept(sock_fd,(struct sockaddr *)&client,&sin_size);
		
		while(true){
		    int data_lenght =  recv(fd, buffer, sizeof(buffer), 0);
		    
		    for(int q=data_lenght-2; q<buffsize; q++){
		           buffer[q] = '\0';
		    }
		    
		    if(buffer == "command"){
		        cout << "Command executed successfully!\n";
		    }
		    
		}		
	}
	
return 0;
}

Please help me!!! Thank you!