Another upload

I have added code for udp also

echoclientudp.cpp

@@ -0,0 +1,66 @@
+#include<stdio.h>
+#include<sys/types.h>
+#include<sys/socket.h>
+#include<netinet/in.h>
+#include<netdb.h>
+#include<stdlib.h>
+#include<string.h>
+#include<unistd.h>
+
+
+
+int main(int argc, char *argv[])
+{
+	int sockfd,newsockfd,portno,chilen,nBytes;
+	char buffer[256];
+
+      	struct sockaddr_in  serv_addr ;
+	struct hostent *server;
+socklen_t addr_size;
+	if(argc<3)
+	{	
+		printf("No port provided");
+		exit(1);	
+	}
+	portno = atoi(argv[2]);
+	//printf("argument mil gyi sari\n");
+	sockfd=socket(PF_INET, SOCK_DGRAM, 0);
+	if(sockfd<0)
+	{
+		printf("Error opening sockt\n");
+		exit(1);
+	}
+	//printf("Socket bhi open ho gya\n");
+	server = gethostbyname(argv[1]);
+	bzero((char*)& serv_addr,sizeof(serv_addr));
+	serv_addr.sin_family=AF_INET;
+	serv_addr.sin_addr.s_addr=INADDR_ANY;
+	serv_addr.sin_port=htons(portno);
+	bcopy((char*) server->h_addr, (char*)& serv_addr.sin_addr.s_addr,server->h_length);
+	serv_addr.sin_port=htons(portno);
+
+	  /*Initialize size variable to be used later on*/
+  addr_size = sizeof serv_addr;
+
+  while(1){
+    printf("Type a sentence to send to server:\n");
+    fgets(buffer,1024,stdin);
+    printf("You typed: %s",buffer);
+
+    nBytes = strlen(buffer) + 1;
+
+    /*Send message to server*/
+    sendto(sockfd,buffer,nBytes,0,(struct sockaddr *)& serv_addr,addr_size);
+
+    /*Receive message from server*/
+                nBytes = recvfrom(sockfd,buffer,1024,0,NULL, NULL);
+
+    printf("Received from server: %s\n",buffer);
+
+  }
+
+
+    	return 0;
+}
+
+

echoserverudp.cpp

@@ -0,0 +1,64 @@
+#include<stdio.h>
+#include<sys/types.h>
+#include<sys/socket.h>
+#include<netinet/in.h>
+#include<netdb.h>
+#include<stdlib.h>
+#include<string.h>
+#include<unistd.h>
+
+
+
+int main(int argc, char *argv[])
+{
+	int sockfd,newsockfd,portno,chilen,nBytes;
+	char buffer[256];
+
+      	struct sockaddr_in  serv_addr ,cli_addr;
+	int n;
+socklen_t addr_size;
+	if(argc<3)
+	{	
+		printf("No port provided");
+		exit(1);	
+	}
+	//printf("argument mil gyi sari\n");
+	sockfd=socket(PF_INET, SOCK_DGRAM,0);
+	if(sockfd<0)
+	{
+
+	printf("Error opening sockt\n");
+	exit(1);
+	}
+	//printf("Socket bhi open ho gya\n");
+	bzero((char*)& serv_addr,sizeof(serv_addr));
+	portno= atoi(argv[2]);
+	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)
+	{
+	printf("Error on binding\n");
+	exit(1);
+	}
+	//printf("Bind bhi ho gya\n");
+/*Initialize size variable to be used later on*/
+  addr_size = sizeof cli_addr;
+
+  while(1){
+    /* Try to receive any incoming UDP datagram. Address and port of 
+      requesting client will be stored on serverStorage variable */
+    nBytes = recvfrom(sockfd,buffer,1024,0,(struct sockaddr *)& cli_addr, &addr_size);
+printf("recieved\n");
+    /*Convert message received to uppercase*/
+
+
+    /*Send uppercase message back to client, using serverStorage as the address*/
+    sendto(sockfd,buffer,nBytes,0,(struct sockaddr *)& cli_addr,addr_size);
+printf("sent\n");
+  }       
+
+    	return 0;
+}
+
+