cli

src/Tarea2-RC-Grupo25-Cliente.cpp

@@ -15,11 +15,37 @@ using namespace std;
 #include <stdlib.h>
 #include <stdio.h>
 
-#define PORT "9999"
-#define HOST "localhost"
+
+
 #define MAXLEN 1024
 
-int main() {
+void error(const char *);
+void TCP(const char* PORT, const char* HOST);
+void UDP(int PORT, const char* HOST);
+
+
+int main(int argc, char *argv[]) {
+
+		printf("argv[0]: %s\n" , argv[0] );
+		printf("argv[1]: %s\n" , argv[1] );
+	   if (strcmp(argv[1],"TCP")  == 0){
+		   TCP("9999", argv[2]);
+	   }else if (strcmp(argv[1],"UDP")  == 0){
+		   UDP(9998 ,argv[2]);
+	   }else{
+		   printf("ERROR: first argument must be TCP or UDP.\n");
+		   return -1;
+	   }
+}
+
+void error(const char *msg)
+{
+    perror(msg);
+    exit(0);
+}
+
+
+void TCP(const char* PORT, const char* HOST){
 	   int client_socket = socket(AF_INET, SOCK_STREAM, 0);
 
 	   //obtenemos la direccion con getaddrinfo
@@ -59,8 +85,46 @@ int main() {
 	   freeaddrinfo(res);
 }
 
+void UDP(int PORT, const char* HOST){
+	   int sock, n;
+	   unsigned int length;
+	   struct sockaddr_in server, from;
+	   struct hostent *hp;
+	   char buffer[256];
 
+	   sock= socket(AF_INET, SOCK_DGRAM, 0);
+	   if (sock < 0)
+		   error("socket");
 
+	   server.sin_family = AF_INET;
+	   hp = gethostbyname(HOST);
+	   if (hp==0)
+		   error("Unknown host");
+
+	   bcopy((char *)hp->h_addr,
+	        (char *)&server.sin_addr,
+	         hp->h_length);
+	   server.sin_port = htons(PORT);
+	   length=sizeof(struct sockaddr_in);
+
+	   bzero(buffer,256);
+
+	   sprintf(buffer, "subscription");
+
+
+	   if (sendto(sock,buffer, strlen(buffer),0,(const struct sockaddr *)&server,length) < 0)
+		   error("Error on send first datagram");
+
+
+	   n = recvfrom(sock,buffer,256,0,(struct sockaddr *)&from, &length);
+	   if (n < 0)
+		   error("recvfrom");
+
+	   write(1,"Got an ack: ",12);
+	   write(1,buffer,n);
+
+	   close(sock);
+}