Tested TCP echo

Author: karthik-d

Check/TCP/Client

@@ -0,0 +1,32 @@
+#include<stdio.h>
+#include<stdlib.h>
+
+#include<arpa/inet.h>
+#include<sys/socket.h>
+#include<sys/types.h>
+#include<netdb.h>
+#include<unistd.h>
+#include<fcntl.h>
+
+void main(){
+    int sock_fd = socket(AF_INET, SOCK_STREAM, 0);
+
+    struct sockaddr_in serv_addr;
+    serv_addr.sin_family = AF_INET;
+    serv_addr.sin_port = htons(8080);
+    serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+
+    int response = connect(sock_fd, (struct sockaddr*)&serv_addr, sizeof(serv_addr));
+    if (response==0){
+        printf("\nConnected");
+    }
+
+    int msg_size = -1;
+    char* msg_buff = (char*)malloc(sizeof(char)*100);
+    do{
+        printf("\nEnter Message: ");
+        scanf(" %s", msg_buff);
+        msg_size = send(sock_fd, msg_buff, 100, 0);  
+        msg_size = recv(sock_fd, msg_buff, 100, 0);      
+    }while(msg_size!=0);
+}

Check/TCP/Server

@@ -0,0 +1,40 @@
+#include<stdio.h>
+#include<stdlib.h>
+
+#include<arpa/inet.h>
+#include<sys/socket.h>
+#include<sys/types.h>
+#include<netdb.h>
+#include<unistd.h>
+#include<fcntl.h>
+
+void main(){
+    int sock_fd = socket(AF_INET, SOCK_STREAM, 0);
+    int true_flag = 1;
+    setsockopt(sock_fd, SOL_SOCKET, SO_REUSEADDR, &true_flag, sizeof(int));
+
+    struct sockaddr_in bind_addr;
+    bind_addr.sin_family = AF_INET;
+    bind_addr.sin_port = htons(8080);
+    bind_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+    bind(sock_fd, (struct sockaddr*)&bind_addr, sizeof(bind_addr));
+
+    listen(sock_fd, 5);
+
+    struct sockaddr_in client_addr;
+    int client_addr_size;
+    int client_fd = accept(sock_fd, (struct sockaddr*)&client_addr, &client_addr_size);
+
+    char *client_ip = (char*)malloc(sizeof(char)*100);
+    inet_ntop(AF_INET, (void*)&client_addr.sin_addr, client_ip, 100);
+    int client_port = (int)ntohs(client_addr.sin_port);
+    printf("\n%s\n%d", client_ip, client_port);
+
+    int msg_size = -1;
+    char* msg_buff = (char*)malloc(sizeof(char)*100);
+    do{
+        msg_size = recv(client_fd, msg_buff, 100, 0);   
+        printf("\n%s", msg_buff);     
+        msg_size = send(client_fd, msg_buff, 100, 0);     
+    }while(msg_size!=0);
+}