Create server.C

server.C

@@ -0,0 +1,83 @@
+/* A simple server in the internet domain using TCP
+   The port number is passed as an argument */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h> 
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+void error(const char *msg)
+{
+    perror(msg);
+    exit(1);
+}
+
+int main(int argc, char *argv[])
+{
+     int sockfd, newsockfd, portno;
+     socklen_t clilen;
+     char buffer[256];
+    
+
+	struct sockaddr_in serv_addr, cli_addr;
+
+	int n;
+    
+
+	if (argc < 2) {
+         fprintf(stderr,"ERROR, no port provided\n");
+         exit(1);
+     }
+     
+	 sockfd = socket(AF_INET, SOCK_STREAM, 0);
+     
+	 if (sockfd < 0) 
+        error("ERROR opening socket");
+     
+	 bzero((char *) &serv_addr, sizeof(serv_addr));
+     
+	 portno = atoi(argv[1]);
+     
+	 serv_addr.sin_family = AF_INET;
+     
+	 serv_addr.sin_addr.s_addr = INADDR_ANY;
+     
+	 serv_addr.sin_port = htons(portno);
+     
+	 if (bind(sockfd, (struct sockaddr *) &serv_addr,
+              sizeof(serv_addr)) < 0) 
+              error("ERROR on binding");
+     
+	 listen(sockfd,5);
+     
+	 clilen = sizeof(cli_addr);
+     
+	 newsockfd = accept(sockfd, 
+                 (struct sockaddr *) &cli_addr, 
+                 &clilen);
+     
+	 if (newsockfd < 0) 
+          error("ERROR on accept");
+     
+	 bzero(buffer,256);
+     
+	 n = read(newsockfd,buffer,255);
+     
+	 
+	 if (n < 0) error("ERROR reading from socket");
+     
+	 
+	 printf("Here is the message: %s\n",buffer);
+     
+	 n = write(newsockfd,"I got your message",18);
+     
+	 if (n < 0) error("ERROR writing to socket");
+     
+	 close(newsockfd);
+     
+	 close(sockfd);
+     
+	 return 0; 
+}