{"id":2545,"date":"2015-05-02T12:24:40","date_gmt":"2015-05-02T12:24:40","guid":{"rendered":"http:\/\/anthroponaute.fr\/blog-informatique\/?p=2545"},"modified":"2016-02-21T10:06:48","modified_gmt":"2016-02-21T10:06:48","slug":"introduction-a-la-programmation-reseau-sockets-partie-2","status":"publish","type":"post","link":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/?p=2545","title":{"rendered":"Introduction \u00e0 la programmation r\u00e9seau (Sockets) \u2013 partie 2"},"content":{"rendered":"

\"48405289\"<\/a><\/p>\n

Intro :<\/strong><\/p>\n

Pour concevoir un jeu vid\u00e9o multijoueur il vous faut utiliser dans le programme C++ des objets qu\u2019on appelle sockets<\/strong>.<\/p>\n

Ceci constitue la deuxi\u00e8me partie<\/strong> de l’ensemble des articles concernant les sockets.<\/p>\n

Dans cette partie nous allons concevoir un petit chat\u00a0<\/strong>en entrant du texte dans la console c\u00f4t\u00e9 client et c\u00f4t\u00e9 serveur.<\/p>\n

Pr\u00e9requis :<\/strong><\/p>\n

\u2013 Savoir un peu lire et \u00e9crire du C++<\/p>\n

\u2013 \u00catre sous Windows.<\/p>\n

– Avoir suivi la premi\u00e8re partie de ce tutoriel<\/p>\n

Explications :<\/strong><\/p>\n

1 –<\/strong> Tout d’abord nous allons \u00e9crire un petit programme de chat par \u00e9crit \u00e0 travers les entr\u00e9es clavier de l’utilisateur dans la console.<\/p>\n

2 –<\/strong> En deuxi\u00e8me partie, j\u2019\u00e9num\u00e9rerais l’ordre d’appel des fonctions sockets selon le r\u00f4le du programme (client ou serveur).<\/p>\n

 <\/p>\n

\n

 <\/p>\n

1 –<\/strong> Petit chat client \/ serveur<\/p>\n

Voici le code du chat c\u00f4t\u00e9 client<\/strong> (ChatClient.cpp) :<\/p>\n

\r\n\/\/----------------------------------------------------\r\n\/\/ Auteur : Cl\u00e9ment Profit\r\n\/\/ Nom du fichier : ChatClient.cpp\r\n\/\/ Date de cr\u00e9ation : Avril 2015\r\n\/\/ Description : Une impl\u00e9mentation d'un client de chat\r\n\/\/----------------------------------------------------\r\n\r\n#include <winsock2.h>\r\n\r\n#include <stdio.h>\r\n#include <stdlib.h>\r\n#include <conio.h>\r\n\r\n#define PORT 23\r\n\r\n\/\/ On lie la librairie des sockets Windows\r\n#pragma comment(lib, "ws2_32.lib")\r\n\r\n\/\/ Structure utilis\u00e9e pour envoyer ces deux param\u00e8tres \u00e0 la fonction\r\n\/\/ thread ; \u00e9tant donn\u00e9 que l'on ne peut qu'envoyer qu'un seul\r\n\/\/ param\u00e8tre aux fonctions thread\r\nstruct ThreadParam\r\n{\r\n\u00a0\u00a0 \u00a0bool bQuit;\r\n\u00a0\u00a0 \u00a0int server_sock;\r\n};\r\n\r\n\/\/ Message \u00e0 envoyer au serveur\r\nstruct ChatMessage\r\n{\r\n\u00a0\u00a0 \u00a0\/\/ Soit c'est un message texte, soit c'est une requ\u00eate pour cloturer \/ quitter\r\n\u00a0\u00a0 \u00a0\/\/ la connexion\r\n\u00a0\u00a0 \u00a0enum MessageType {CHAT_MESSAGE, CHAT_QUIT};\r\n\r\n\u00a0\u00a0 \u00a0ChatMessage(MessageType message, char* information)\r\n\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0message_type = message;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0strcpy_s(sInfo, information);\r\n\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0ChatMessage() {};\r\n\r\n\u00a0\u00a0 \u00a0MessageType message_type;\r\n\r\n\u00a0\u00a0 \u00a0\/\/ On utilise un tableau de caract\u00e8res \u00e0 taille fixe\r\n\u00a0\u00a0 \u00a0\/\/ car on ne peut envoyer un pointeur char* sur une machine distante\r\n\u00a0\u00a0 \u00a0\/\/ (le pointeur \u00e9tant li\u00e9 uniquement \u00e0 la m\u00e9moire de la machine \u00e9mettrice)\r\n\u00a0\u00a0 \u00a0char sInfo[4096];\r\n};\r\n\r\n\/\/ Fonction pour obtenir une cha\u00eene de caract\u00e8res tapp\u00e9e\r\n\/\/ depuis le clavier de l'utilisateur\r\nchar* get_string_input()\r\n{\r\n\u00a0\u00a0\u00a0 char* message = new char[4096];\r\n\r\n\u00a0\u00a0 \u00a0\/\/ La fonction _getch() permet de tapper un caract\u00e8re\r\n\u00a0\u00a0 \u00a0\/\/ sans l'afficher dans la console\r\n\u00a0\u00a0 \u00a0char ch = _getch();\r\n\u00a0\u00a0 \u00a0\r\n\u00a0\u00a0 \u00a0\/\/ Si on tappe la touche entr\u00e9e on ne fait rien\r\n\u00a0\u00a0 \u00a0if (ch == 13)\r\n\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return nullptr;\r\n\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0unsigned int length = 0;\r\n\r\n\u00a0\u00a0 \u00a0\/\/ On tappe un caract\u00e8re par tour de boucle\r\n\u00a0\u00a0 \u00a0while (ch != 13) \/\/ Le caract\u00e8re 13 est la touche entr\u00e9e\r\n\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0message[length] = ch;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0length++;\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (length > 4096)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0ch = _getch();\r\n\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0\/\/ A la fin du message, on met un indicateur de fin de cha\u00eene de caract\u00e8re\r\n\u00a0\u00a0 \u00a0\/\/ pour finaliser la cha\u00eene\r\n\u00a0\u00a0 \u00a0message[length] = '\0';\r\n\r\n\u00a0\u00a0 \u00a0return message;\r\n}\r\n\r\n\/\/ Thread pour entrer des messages \u00e0 partir du clavier\r\nDWORD WINAPI get_console_message(LPVOID lpParameter)\r\n{\r\n\u00a0\u00a0 \u00a0\/\/ On fait un cast pour obtenir notre param\u00e8tre\r\n\u00a0\u00a0 \u00a0ThreadParam* param = (ThreadParam*)lpParameter;\r\n\r\n\u00a0\u00a0 \u00a0printf("Saisissez un message.\\n");\r\n\u00a0\u00a0 \u00a0char* sMessage = nullptr;\r\n\r\n\u00a0\u00a0 \u00a0\/\/ A chaque tour de boucle correspond un message tapp\u00e9\r\n\u00a0\u00a0 \u00a0while(true)\r\n\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On obtient le message tapp\u00e9\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0sMessage = get_string_input();\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (sMessage == nullptr)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0continue;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Si l'on tappe "quit", le programme s'arr\u00eate\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (strcmp(sMessage, "quit") == 0)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("Au revoir !\\n");\u00a0\u00a0 \u00a0\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0system("pause");\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On envoie un ChatMessage de sortie\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ pour indiquer d'arr\u00eater le programme de la machine\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ distante\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0ChatMessage quitMessage(ChatMessage::CHAT_QUIT, "");\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0send(param->server_sock, (char*)&quitMessage, sizeof(quitMessage), 0);\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Nous for\u00e7ons aussi l'arr\u00eat de notre programme sur la machine locale\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0param->bQuit = true;\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0};\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On envoie un ChatMessage de texte corresopodant \u00e0 celui tapp\u00e9\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0ChatMessage chatMessage(ChatMessage::CHAT_MESSAGE, sMessage);\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0send(param->server_sock, (char*)&chatMessage, sizeof(ChatMessage), 0);\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("[Vous]# %s\\n", sMessage);\r\n\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0delete sMessage;\r\n\r\n\u00a0\u00a0 \u00a0return 0;\r\n}\r\n\r\n\/** Client **\/\r\nint main(void)\r\n{\r\n\u00a0\u00a0 \u00a0\/\/ Il faut appeler ces deux instructions avant toute\r\n\u00a0\u00a0 \u00a0\/\/ utilisation de socket\r\n\u00a0\u00a0 \u00a0WSADATA WSAData;\r\n\u00a0\u00a0 \u00a0int error = WSAStartup(MAKEWORD(2,2), &WSAData);\r\n\u00a0\r\n\u00a0\u00a0 \u00a0\/\/ Voici nos structures de socket\r\n\u00a0\u00a0 \u00a0SOCKET sock;\r\n\u00a0\u00a0 \u00a0SOCKADDR_IN server_in;\r\n\r\n\u00a0\u00a0\u00a0 \/\/ Si les sockets Windows fonctionnent\r\n\u00a0\u00a0\u00a0 if (!error)\r\n\u00a0\u00a0\u00a0 {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ Cr\u00e9ation de la socket\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0sock = socket(AF_INET, SOCK_STREAM, 0);\r\n\u00a0\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On passe en mode non bloqu\u00e9, c'est-\u00e0-dire que les fonctions recv() et send()\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ ne bloquent pas quand un message n'a pas \u00e9t\u00e9 envoy\u00e9 ou re\u00e7u\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0unsigned long mode = 1;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0ioctlsocket(sock, FIONBIO, &mode);\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Configuration de la connexion\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On peut changer ici l'adresse d'un serveur non local\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0server_in.sin_addr.s_addr = inet_addr("127.0.0.1");\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0server_in.sin_family = AF_INET;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0server_in.sin_port = htons(PORT);\r\n\u00a0\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("Tentative de connexion au serveur (tappez exit pour quitter)...\\n");\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On se connecte au serveur\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0error = connect(sock, (SOCKADDR*)&server_in, sizeof(server_in));\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (error != SOCKET_ERROR)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("Connection \u00e0 %s sur le port %d\\n", inet_ntoa(server_in.sin_addr), htons(server_in.sin_port));\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\u00a0\u00a0 \u00a0\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Structure de param\u00e8tre pour envoyer\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ plus d'une variable \u00e0 la fonction thread\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0ThreadParam param;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0param.bQuit = false;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0param.server_sock = sock;\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Cr\u00e9ation d'un thread pour effectuer la lecture d'un message ind\u00e9pendamment\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ de l'\u00e9coute par la fonction recv\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0CreateThread(nullptr, 0, &get_console_message, (void*)&param, 0, nullptr); \u00a0\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0ChatMessage* message = nullptr;\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Comme les packets r\u00e9seaux re\u00e7us peuvent \u00eatre de diff\u00e9rentes tailles\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ et qu'ils sont re\u00e7us par segments,\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ nous avons besoin d'un buffer secondaires pour lui ajouter\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ les segments par segments\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int iTotalBytes = sizeof(ChatMessage);\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int iCurrentBytes = 0;\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0char* buffer = new char[iTotalBytes];\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0char* pRecvBuffer = new char[iTotalBytes];\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0while (!param.bQuit)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On recoit des donn\u00e9es qui peuvent \u00eatre un segment\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int iBytes = recv(sock, buffer, iTotalBytes, 0);\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (iBytes != SOCKET_ERROR)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On rajoute le segment re\u00e7u dans le buffer \u00e0 chaque fois\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ que des donn\u00e9es ont \u00e9t\u00e9 re\u00e7ues plus haut\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0memcpy(pRecvBuffer + iCurrentBytes, buffer, iBytes);\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0iCurrentBytes += iBytes;\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ D\u00e8s qu'on a re\u00e7u le message au complet\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ c'est-\u00e0-dire d\u00e8s que la taille du buffer a atteint\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ la taille du message\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (iCurrentBytes >= iTotalBytes)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0message = (ChatMessage*) pRecvBuffer;\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Si l'on recoit un message qui nous indique de quitter\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (message->message_type == ChatMessage::CHAT_QUIT)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0wprintf(L"Le serveur s'est deconnect\u00e9.\\n");\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0system("pause");\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On quitte la boucle\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (message->sInfo != '\0')\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On affiche le message re\u00e7u depuis le serveur\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("[Serveur]# : %s\\n", message->sInfo);\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\u00a0\u00a0 \u00a0\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0iCurrentBytes = 0;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ On ferme la socket\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 closesocket(sock);\r\n\u00a0\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Termine l'utilisation de Winsock 2\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 WSACleanup();\r\n\u00a0\u00a0\u00a0 }\r\n\r\n\u00a0\u00a0\u00a0 return EXIT_SUCCESS;\r\n}\r\n<\/pre>\n
 <\/p>\n
Voici le code du chat c\u00f4t\u00e9 serveur<\/strong> (ChatServeur.cpp) :<\/p>\n
\r\n\/\/----------------------------------------------------\r\n\/\/ Auteur : Cl\u00e9ment Profit\r\n\/\/ Nom du fichier : ChatServeur.cpp\r\n\/\/ Date de cr\u00e9ation : Avril 2015\r\n\/\/ Description : Une impl\u00e9mentation d'un serveur de chat\r\n\/\/----------------------------------------------------\r\n\r\n#include <winsock2.h>\r\n#include <stdio.h>\r\n#include <stdlib.h>\r\n#include <string.h>\r\n#include <conio.h>\r\n\r\n#define PORT 23\r\n\r\n\/\/ On lie la librairie des sockets Windows\r\n#pragma comment(lib, "ws2_32.lib")\r\n\r\n\/\/ Structure utilis\u00e9e pour envoyer ces deux param\u00e8tres \u00e0 la fonction\r\n\/\/ thread ; \u00e9tant donn\u00e9 que l'on ne peut qu'envoyer qu'un seul\r\n\/\/ param\u00e8tre aux fonctions thread\r\nstruct ThreadParam\r\n{\r\n\u00a0\u00a0 \u00a0bool bQuit;\r\n\u00a0\u00a0 \u00a0int client_sock;\r\n};\r\n\r\n\/\/ Message \u00e0 envoyer au serveur\r\nstruct ChatMessage\r\n{\r\n\u00a0\u00a0 \u00a0\/\/ Soit c'est un message texte, soit c'est une requ\u00eate pour cloturer \/ quitter\r\n\u00a0\u00a0 \u00a0\/\/ la connexion\r\n\u00a0\u00a0 \u00a0enum MessageType {CHAT_MESSAGE, CHAT_QUIT};\r\n\r\n\u00a0\u00a0 \u00a0ChatMessage(MessageType message, char* information)\r\n\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0message_type = message;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0strcpy_s(sInfo, information);\r\n\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0ChatMessage() {};\r\n\r\n\u00a0\u00a0 \u00a0MessageType message_type;\r\n\r\n\u00a0\u00a0 \u00a0\/\/ On utilise un tableau de caract\u00e8res \u00e0 taille fixe\r\n\u00a0\u00a0 \u00a0\/\/ car on ne peut envoyer un pointeur char* sur une machine distante\r\n\u00a0\u00a0 \u00a0\/\/ (le pointeur \u00e9tant li\u00e9 uniquement \u00e0 la m\u00e9moire de la machine \u00e9mettrice)\r\n\u00a0\u00a0 \u00a0char sInfo[4096];\r\n};\r\n\r\n\/\/ Si un erreur a lieu, on affiche la raison\r\n\/\/ puis on quitte\r\nvoid exit_on_fail(int sock_err)\r\n{\r\n\u00a0\u00a0 \u00a0if (sock_err == SOCKET_ERROR)\r\n\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("Socket Error Code = %i", WSAGetLastError());\r\n\u00a0\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0system("pause");\r\n\u00a0\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0exit(EXIT_FAILURE);\r\n\u00a0\u00a0 \u00a0}\r\n}\r\n\r\n\/\/ Fonction pour obtenir une cha\u00eene de caract\u00e8res tapp\u00e9e\r\n\/\/ depuis le clavier de l'utilisateur\r\nchar* get_string_input()\r\n{\r\n\u00a0\u00a0\u00a0 char* message = new char[4096];\r\n\r\n\u00a0\u00a0 \u00a0\/\/ La fonction _getch() permet de tapper un caract\u00e8re\r\n\u00a0\u00a0 \u00a0\/\/ sans l'afficher dans la console\r\n\u00a0\u00a0 \u00a0char ch = _getch();\r\n\r\n\u00a0\u00a0 \u00a0\/\/ Si on tappe la touche entr\u00e9e on ne fait rien\r\n\u00a0\u00a0 \u00a0if (ch == 13)\r\n\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return nullptr;\r\n\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0unsigned int length = 0;\r\n\r\n\u00a0\u00a0 \u00a0\/\/ On tappe un caract\u00e8re par tour de boucle\r\n\u00a0\u00a0 \u00a0while (ch != 13) \/\/ Le caract\u00e8re 13 est la touche entr\u00e9e\r\n\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0message[length] = ch;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0length++;\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (length > 4096)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0ch = _getch();\r\n\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0\/\/ A la fin du message, on met un indicateur de fin de cha\u00eene de caract\u00e8re\r\n\u00a0\u00a0 \u00a0\/\/ pour finaliser la cha\u00eene\r\n\u00a0\u00a0 \u00a0message[length] = '\0';\r\n\r\n\u00a0\u00a0 \u00a0return message;\r\n}\r\n\r\n\/\/ Thread pour entrer des messages \u00e0 partir du clavier\r\nDWORD WINAPI get_console_message(LPVOID lpParameter)\r\n{\r\n\u00a0\u00a0 \u00a0\/\/ On fait un cast pour obtenir notre param\u00e8tre\r\n\u00a0\u00a0 \u00a0ThreadParam* param = (ThreadParam*)lpParameter;\r\n\r\n\u00a0\u00a0 \u00a0printf("Saisissez un message.\\n");\r\n\u00a0\u00a0 \u00a0char* sMessage = nullptr;\r\n\r\n\u00a0\u00a0 \u00a0\/\/ A chaque tour de boucle correspond un message tapp\u00e9\r\n\u00a0\u00a0 \u00a0while(true)\r\n\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On obtient le message tapp\u00e9\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0sMessage = get_string_input();\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (sMessage == nullptr)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0continue;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Si l'on tappe "exit", le programme s'arr\u00eate\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (strcmp(sMessage, "quit") == 0)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("Au revoir !\\n");\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0system("pause");\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On envoie un ChatMessage de sortie\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ pour indiquer d'arr\u00eater le programme de la machine\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0ChatMessage quitMessage(ChatMessage::CHAT_QUIT, "");\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0send(param->client_sock, (char*)&quitMessage, sizeof(ChatMessage), 0);\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Nous for\u00e7ons aussi l'arr\u00eat de notre programme sur la machine locale\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0param->bQuit = true;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0};\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On envoie un ChatMessage de texte correspondant \u00e0 celui tapp\u00e9\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0ChatMessage chatMessage(ChatMessage::CHAT_MESSAGE, sMessage);\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0send(param->client_sock, (char*)&chatMessage, sizeof(ChatMessage), 0);\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("[Vous]# %s\\n", sMessage);\r\n\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0delete sMessage;\r\n\r\n\u00a0\u00a0 \u00a0return 0;\r\n}\r\n\r\n\/** Serveur **\/\r\nint main(void)\r\n{\r\n\u00a0\u00a0 \u00a0\/\/ Il faut appeler ces deux instructions avant toute\r\n\u00a0\u00a0 \u00a0\/\/ utilisation de socket\r\n\u00a0\u00a0 \u00a0WSADATA WSAData;\r\n\u00a0\u00a0 \u00a0int error = WSAStartup(MAKEWORD(2,2), &WSAData);\r\n\r\n\u00a0\u00a0\u00a0 SOCKET sock;\r\n\u00a0\u00a0 \u00a0SOCKET client_sock;\r\n\r\n\u00a0\u00a0 \u00a0\/\/ Voici nos structures de socket\r\n\u00a0\u00a0\u00a0 SOCKADDR_IN server_in;\r\n\u00a0\u00a0\u00a0 SOCKADDR_IN client_in;\r\n\r\n\u00a0\u00a0\u00a0 int recsize = sizeof(client_in);\r\n\r\n\u00a0\u00a0\u00a0 int sock_err;\r\n\u00a0\r\n\u00a0\u00a0\u00a0 \/\/ Si les sockets Windows fonctionnent\r\n\u00a0\u00a0\u00a0 if (!error)\r\n\u00a0\u00a0\u00a0 {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ Cr\u00e9ation de la socket\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 sock = socket(AF_INET, SOCK_STREAM, 0);\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On passe en mode non bloqu\u00e9, c'est-\u00e0-dire que les fonctions recv() et send()\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ ne bloquent pas quand un message n'a pas \u00e9t\u00e9 envoy\u00e9 ou re\u00e7u\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0unsigned long mode = 1;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0ioctlsocket(sock, FIONBIO, &mode);\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ Si la socket est valide\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if (sock != INVALID_SOCKET)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf("Bienvenu sur le chat (tappez exit pour quitter) !\\n\\nLe serveur est maintenant ouvert en mode TCP\/IP sur le port %d\\n\\n", PORT);\r\n\u00a0\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ Configuration de la socket\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 server_in.sin_addr.s_addr = htonl(INADDR_ANY);\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 server_in.sin_family = AF_INET;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 server_in.sin_port = htons(PORT); \r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On configure le serveur\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 sock_err = bind(sock, (SOCKADDR*)&server_in, sizeof(server_in));\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0exit_on_fail(sock_err);\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0sock_err = listen(sock, 5);\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0exit_on_fail(sock_err);\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("Patientez pendant que le client se connecte...\\n");\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On boucle pour attendre la connexion d'un client\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0while (true)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0client_sock = accept(sock, (SOCKADDR*)&client_in, &recsize);\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Si un client se connecte\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (client_sock != SOCKET_ERROR)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("\\nUn client se connecte avec la socket %d de %s:%d\\n", client_sock, inet_ntoa(client_in.sin_addr), htons(client_in.sin_port));\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Structure de param\u00e8tre pour envoyer\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ plus d'une variable \u00e0 la fonction thread\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0ThreadParam param;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0param.bQuit = false;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0param.client_sock = client_sock;\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Cr\u00e9ation d'un thread pour effectuer la lecture d'un message ind\u00e9pendamment\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ de l'\u00e9coute de la socket\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0CreateThread(nullptr, 0, &get_console_message, (void*)&param, 0, nullptr);\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0ChatMessage* message = nullptr;\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Comme les packets r\u00e9seaux re\u00e7us peuvent \u00eatre de diff\u00e9rentes tailles\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ et qu'ils sont re\u00e7us par segments,\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ nous avons besoin d'un buffer secondaires pour lui ajouter\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ les segments par segments\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int iTotalBytes = sizeof(ChatMessage);\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int iCurrentBytes = 0;\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0char* buffer = new char[iTotalBytes];\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0char* pRecvBuffer = new char[iTotalBytes];\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0while (!param.bQuit)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On recoit des donn\u00e9es qui peuvent \u00eatre un segment\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int iBytes = recv(client_sock, buffer, iTotalBytes, 0);\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (iBytes != SOCKET_ERROR)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\u00a0\u00a0 \u00a0\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On rajoute le segment re\u00e7u dans le buffer \u00e0 chaque fois\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ que des donn\u00e9es ont \u00e9t\u00e9 re\u00e7ues plus haut\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0memcpy(pRecvBuffer + iCurrentBytes, buffer, iBytes);\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0iCurrentBytes += iBytes;\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ D\u00e8s qu'on a re\u00e7u le message au complet\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ c'est-\u00e0-dire d\u00e8s que la taille du buffer a atteint\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ la taille du message\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (iCurrentBytes >= iTotalBytes)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0message = (ChatMessage*) pRecvBuffer;\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ Si l'on recoit un message qui nous indique de quitter\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (message->message_type == ChatMessage::CHAT_QUIT)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0wprintf(L"Le client s'est deconnect\u00e9.\\n");\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0system("pause");\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On quitte la boucle\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (message->sInfo != '\0')\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On affiche le message re\u00e7u depuis le client\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("[Client]# : %s\\n", message->sInfo);\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0iCurrentBytes = 0;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ On ferme la socket\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0closesocket(sock);\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\u00a0\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 WSACleanup();\r\n\u00a0\u00a0\u00a0 }\r\n\r\n\u00a0\r\n\u00a0\u00a0\u00a0 return EXIT_SUCCESS;\r\n}\r\n<\/pre>\n
 <\/p>\n
\n
 <\/p>\n
2 – Ordre d’appel<\/strong> des fonctions socket selon le r\u00f4le de l’application (client ou serveur) :<\/p>\n
\"OrdreTCP\"<\/a><\/p>\n
 <\/p>\n
R\u00e9sum\u00e9 :<\/strong><\/p>\n
Nous avons construit une application client \/ serveur pour communiquer en messagerie par le biais de la fen\u00eatre console.<\/p>\n
R\u00e9f\u00e9rences :<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"
Intro : Pour concevoir un jeu vid\u00e9o multijoueur il vous faut utiliser dans le programme C++ des objets qu\u2019on appelle sockets. Ceci constitue la deuxi\u00e8me partie de l’ensemble des articles concernant les sockets. Dans cette partie nous allons concevoir un petit chat\u00a0en entrant du texte dans la console c\u00f4t\u00e9 client et c\u00f4t\u00e9 serveur. Pr\u00e9requis : […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[22],"tags":[],"_links":{"self":[{"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=\/wp\/v2\/posts\/2545"}],"collection":[{"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2545"}],"version-history":[{"count":17,"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=\/wp\/v2\/posts\/2545\/revisions"}],"predecessor-version":[{"id":2822,"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=\/wp\/v2\/posts\/2545\/revisions\/2822"}],"wp:attachment":[{"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2545"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2545"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}