Linux function Linux chat program socket-based TCP (connected) chat program

/* Only pay the header file here. If necessary, download the file from my resources.

Http://download.csdn.net/detail/ta893115871/4322905

O (∩) O Thank you

Currently, the following functions are available:

1. group chat

2. Private Chat

3. login verification

4. Registration

5. used online users

6. Exit

7. The Administrator kicks out a user.

8. The Administrator prohibits a user from chatting.

9. The administrator promotes a user as the administrator.

10. The Administrator reduced a user to a common user.

*/

/* Author QQ: 893115871 author Email: gfj19900401@163.com header file, function declaration and macro definition */# ifndef chat_h # define chat_h # include <stdio. h> # include <stdlib. h> # include <string. h> # include <sys/types. h> # include <sys/socket. h> // # include <Linux/in. h> # include <ARPA/inet. h> # include <pthread. h> # include <fcntl. h> # include <sys/STAT. h> # include <sys/types. h> # include <signal. h> # include <time. h> // For asctime () and time () # include <ctype. h> // For ispunct () # define queuelen 100 // max of Client # define buf_size 256 // # define IP "127.0.0.1" # define IP "192.168.1.101" // remote IP # Define Port 1234 // port # define filename "userinfo" // file name for save users Info (Name: passwd: ID: Authority) # define client_id 1000 // Client ID // ============================ functions ==== ========================================================== ==## define public_chat 1 // group chat # define private_chat 2 // private chat # define client_login 3 // login verification # define client_register 4 // registration # define client_online 5 // used online User # define client_exit 6 // exit # define admin_kick_client 7 // The Administrator kicks out a user # define admin_shutup_client 8 // The Administrator disallows a user to chat # define advanced_client_to_admin 9 // The administrator promotes a user for the Administrator # define drop_client_to_normal 10 // The Administrator drops a user to a common user // ================== ========================================================== ====## Define Login 0 // normal user logon failed # define normal_user_login_success 1 // normal user logon successful # Define Login 2 // normal user already online # define admin_login_success 3/ /Administrator Logon successful # define normal_user_login_passwd_error 4 // normal user logon Password error # define regist_falied 0 // registration failed # define regist_exited 1 // the registered user already exists # define normal_user 0 // ordinary user # define admin_user 1 // administrator // ============= client ATTR ============ ====================================== typedef struct {pthread_t tid; // The thread descriptor int sockfd; // The new socket descriptor char client_name [25] of the client returned by accept; // The account char client_passwd [25]; // The password int client_id; // user ID int is_online; // online status 1 online 0 offline int admin; // user permission, 1 as administrator, 0 as common user} client_info; client_info clients [queuelen]; // =============== Data Structure sent by the customer =================================== ================== typedef struct send_info {int type; // type char ID [25]; // ID of the other party char Buf [buf_size]; // content char name [25]; // User Name (nickname) Char passwd [25]; // password} send_info; // ======================== function Protocol ======================== typedef struct {int fun_flag; // function flag void (* Fun) (); // function pointer variable} proto; // ================================== debug =================== ============## define chat_debug # ifdef chat_debug # define debug (message ...) fprintf (stderr, message) # else # define debug (message ...) # endif // ========= fun =========== client. c ========================== void print_err (char * MSG); void reg_log (); void register_client (); void login (); void init_conn (); void writefun (); void show_menu (); void wait_minutes (); void signhandler (INT signno ); // ======= fun ======= server. c ================================ int system_init (); void connect_to_client (INT socketfd ); void err (char * err_msg); int init_clents (char * tok_file []); void register_new_client (send_info * Send, int newfd); void server_check_login (send_info * Send, int newfd ); void client_exit (send_info * Send, int newfd); int get_sockfd (char Dest []); void private_chat (send_info * Send, int newfd); void public_chat (send_info * send, int newfd); void get_all_online_clients (send_info * Send, int newfd); void admin_kick_client (send_info * Send, int newfd); void admin_shutup_client (send_info * Send, int newfd ); void Merge (send_info * Send, int newfd); void drop_client_to_normal (send_info * Send, int newfd); int admin_is_opt_self (send_info * Send, int newfd); int admin_opt_self (send_info * Send, int newfd); # endif