tcp_client.c

#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/ip.h>
#include <arpa/inet.h>

int main(){
	
	//Step 1: Create a socket
	int sockfd = socket(AF_INET, SOCK_STREAM, 0);
	
	//Step 2: Set the destination info 
	struct sockaddr_in dest;
	memset(&dest, 0, sizeof(struct sockaddr_in));
	dest.sin_family = AF_INET;
	//You are going to have to change the IP address in the line below to the IP address of the machine you are using as the server. In my case, 10.0.2.8
	dest.sin_addr.s_addr = inet_addr("10.0.2.8"); 
	dest.sin_port = htons(9090);

	//Step 3: Connect to the server
	connect(sockfd, (struct sockaddr *)&dest, sizeof(struct sockaddr_in));

	//Step 4: send data to server 
	//The data we are sending is two static strings
	char* buffer1 = "Hello Server!\n";
	char* buffer2 = "Hello Again!\n";
	write(sockfd, buffer1, strlen(buffer1));
	write(sockfd, buffer2, strlen(buffer2));

	//Step 5: close the connection
	close(sockfd);
	return 0;
}//ENDMAIN