Exo 4 fait

02-config-adresse/sender-udp.c

@@ -32,7 +32,12 @@ int main (int argc, char *argv [])
     /* complete sockaddr struct */
     int error;
     struct addrinfo *res;
-    error =getaddrinfo(IP,argv[1],NULL,&res);
+    struct addrinfo hints;
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_family = AF_INET;
+    hints.ai_socktype = SOCK_DGRAM;
+    hints.ai_protocol = IPPROTO_UDP;
+    error =getaddrinfo(IP,argv[1],&hints,&res);
     if(error!=0){
         perror("getaddrinfo\n");
         exit(EXIT_FAILURE);
@@ -49,7 +54,7 @@ int main (int argc, char *argv [])
             exit(EXIT_FAILURE);
         }
     }
-    CHECK(sendto(new_socket,phrase,strlen(phrase),0,res->ai_addr,res->ai_addrlen));
+    CHECK(sendto(new_socket,phrase,strlen(phrase),0,list_udp->ai_addr,list_udp->ai_addrlen));
     /* close socket */
     close(new_socket);
     /* free memory */   

03-recepteurUDPv4/receiver-udp.c

@@ -32,7 +32,12 @@ int main (int argc, char *argv [])
     CHECK(new_socket);
     int error;
     struct addrinfo *res;
-    error =getaddrinfo(IP,argv[1],NULL,&res);
+    struct addrinfo hints;
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_family = AF_INET;
+    hints.ai_socktype = SOCK_DGRAM;
+    hints.ai_protocol = IPPROTO_UDP;
+    error =getaddrinfo(IP,argv[1],&hints,&res);
     if(error!=0){
         perror("getaddrinfo\n");
         exit(EXIT_FAILURE);
@@ -51,7 +56,7 @@ int main (int argc, char *argv [])
         }
     }
     /* link socket to local IP and PORT */
-    CHECK(bind(new_socket,res->ai_addr,res->ai_addrlen));
+    CHECK(bind(new_socket,list_udp->ai_addr,list_udp->ai_addrlen));
     /* wait for incoming message */
     char buffer[SIZE];
     CHECK(recvfrom(new_socket,buffer,SIZE,0,NULL,NULL));

04-affichage-adresse/receiver-udp.c

@@ -5,7 +5,8 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <unistd.h>
- #include <netdb.h>
+#include <netdb.h>
+#include <errno.h>
 
 #define CHECK(op)   do { if ( (op) == -1) { perror (#op); exit (EXIT_FAILURE); } \
                     } while (0)
@@ -16,22 +17,60 @@
 int main (int argc, char *argv [1])
 {
     /* test arg number */
-
+    if(argc != 2)
+    {
+        perror("Invalid argument's number\n");
+        exit(EXIT_FAILURE);
+    }
     /* convert and check port number */
-
+    int port_number = atoi(argv[1]);
+    if(port_number < 10000 || port_number > 65000){
+        perror("Invalid port number\n");
+        exit(EXIT_FAILURE);
+    }
     /* create socket */
-
+    int new_socket=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
+    CHECK(new_socket);
+    int error;
+    struct addrinfo *res;
+    struct addrinfo hints;
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_family = AF_INET;
+    hints.ai_socktype = SOCK_DGRAM;
+    hints.ai_protocol = IPPROTO_UDP;
+    error =getaddrinfo(IP,argv[1],&hints,&res);
+    if(error!=0){
+        perror("getaddrinfo\n");
+        exit(EXIT_FAILURE);
+    }
     /* complete struct sockaddr */
+    struct addrinfo *list_udp=res;
+    while (list_udp->ai_protocol != IPPROTO_UDP)
+    {
 
+        list_udp = list_udp->ai_next;
+        if (list_udp == NULL)
+        {
+            perror("Problème pas de protocole UDP");
+            exit(EXIT_FAILURE);
+        }
+    }
     /* link socket to local IP and PORT */
-
+    CHECK(bind(new_socket,list_udp->ai_addr,list_udp->ai_addrlen));
     /* wait for incoming message */
-
+    char buffer[SIZE],ip[SIZE],port[SIZE];
+    struct sockaddr_storage socket_storage;
+    socklen_t socket_len = sizeof(socket_storage);
+    int result =recvfrom(new_socket,buffer,SIZE,0,(struct sockaddr*)&socket_storage,&socket_len);
+    CHECK(result);
     /* print sender addr and port */
-
+    if(getnameinfo((struct sockaddr*)&socket_storage,socket_len,ip,SIZE,port,SIZE,NI_NUMERICHOST | NI_NUMERICSERV)==0){
+        fprintf(stdout,"hello world\n");
+        fprintf(stdout,"%s %s\n",ip,port);
+    }
     /* close socket */
-
+    close(new_socket);
     /* free memory */
-
+    freeaddrinfo(res);
     return 0;
 }