q2_UDP_server

Author: GhazaleZe

lab6_question2_server.c

@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+int main() {
+    int server_socket;
+    char buffer[256];
+    char hello_msg[256];
+    struct sockaddr_in server_address, client_address;
+    // Creating a socket file descriptor
+    if ( (server_socket = socket(AF_INET, SOCK_DGRAM, 0)) < 0 ) {
+        printf("error: socket creation failed\n");
+        return -1; }
+    // Filling server information
+    server_address.sin_family = AF_INET;
+    server_address.sin_addr.s_addr=inet_addr("127.0.0.1");
+    server_address.sin_port = htons(6000);
+    // Bind the socket with the server address
+    if ( bind(server_socket, (const struct sockaddr *)&server_address,
+              sizeof(server_address)) < 0 )
+    {
+        printf("error: bind failed\n");
+        return (-1);
+    }
+    int client_address_len = sizeof(client_address);
+    int n;
+    n = recvfrom(server_socket, (char *)buffer, 255, MSG_WAITALL, ( struct sockaddr
+                                                                   *) &client_address, &client_address_len);
+    buffer[n] = '\0';
+    printf("A message from a client: %s\n" , buffer);
+    int val1,val2;
+    sscanf(buffer,"%d%d",&val1,&val2);
+    val1=val1+val2;
+    sprintf(hello_msg, "%d",val1);
+    sendto(server_socket, (const char *)hello_msg, strlen(hello_msg),MSG_CONFIRM,
+           (const struct sockaddr *) &client_address, client_address_len);
+    printf("done.\n");
+    return 0; 
+    }