From 726481cc8f9a9901a54d3dc75c0f2780f2616859 Mon Sep 17 00:00:00 2001
From: Arthur-Coppey <arthur.coppey@viacesi.fr>
Date: Mon, 18 Oct 2021 13:53:21 +0200
Subject: [PATCH] working udp client

---
 client/client.c | 9 +++++++--
 client/client.h | 1 +
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/client/client.c b/client/client.c
index a7688ea..0eabfe6 100644
--- a/client/client.c
+++ b/client/client.c
@@ -4,6 +4,8 @@
 
 #include "client.h"
 
+extern int errno;
+
 int tcp() {
     struct sockaddr_in server;
     int sock;
@@ -50,6 +52,7 @@ int tcp() {
 int udp() {
     struct sockaddr_in server;
     int sock;
+    unsigned long addressLength = sizeof server;
 
     int proto = IPPROTO_UDP;
     enum __socket_type socketType = SOCK_DGRAM;
@@ -66,15 +69,17 @@ int udp() {
     puts("socket created");
 
     char *payload = "I dream of sushi";
-    if (sendto(sock, payload, strlen(payload), 0, (const struct sockaddr *) &server, sizeof server) < 0) {
+    if (sendto(sock, payload, strlen(payload), 0, (const struct sockaddr *) &server, addressLength) < 0) {
         puts("error while sending payload");
+        perror("sendto");
         return 3;
     }
     puts("payload sent");
 
     char response[2048];
-    if (recvfrom(sock, response, 2048, 0, (struct sockaddr *) &server, (socklen_t *) sizeof server) < 0) {
+    if (recvfrom(sock, response, 2048, 0, (struct sockaddr *) &server, (socklen_t *) &addressLength) < 0) {
         puts("receive failed");
+        perror("recvfrom");
         return 4;
     }
     printf("server response : %s\n", response);
diff --git a/client/client.h b/client/client.h
index 1be53eb..17bb0cd 100644
--- a/client/client.h
+++ b/client/client.h
@@ -11,6 +11,7 @@
 #include <string.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <errno.h>
 
 int tcp();