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talk-client.c
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talk-client.c
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#include <time.h>
#include <curses.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <pthread.h>
#include <gtk/gtk.h>
char * host;
char * user;
char * password;
char * sport;
char * args;
int port;
#define MAX_MESSAGES 100
#define MAX_MESSAGE_LEN 300
#define MAX_RESPONSE (20 * 1024)
int lastMessage = 0;
GdkPixbuf *create_pixbuf(const gchar * filename)
{
GdkPixbuf *pixbuf;
GError *error = NULL;
pixbuf = gdk_pixbuf_new_from_file(filename, &error);
if (!pixbuf) {
fprintf(stderr, "%s\n", error->message);
g_error_free(error);
}
return pixbuf;
}
int open_client_socket(char * host, int port) {
// Initialize socket address structure
struct sockaddr_in socketAddress;
// Clear sockaddr structure
memset((char *)&socketAddress, 0, sizeof(socketAddress));
// Set family to Internet
socketAddress.sin_family = AF_INET;
// Set port
socketAddress.sin_port = htons((u_short)port);
// Get host table entry for this host
struct hostent *ptrh = gethostbyname(host);
if (ptrh == NULL) {
perror("gethostbyname");
exit(1);
}
// Copy the host ip address to socket address structure
memcpy(&socketAddress.sin_addr, ptrh->h_addr, ptrh->h_length);
// Get TCP transport protocol entry
struct protoent *ptrp = getprotobyname("tcp");
if (ptrp == NULL) {
perror("getprotobyname");
exit(1);
}
// Create a tcp socket
int sock = socket(PF_INET, SOCK_STREAM, ptrp->p_proto);
if (sock < 0) {
perror("socket");
exit(1);
}
// Connect the socket to the specified server
if (connect(sock, (struct sockaddr *)&socketAddress,
sizeof(socketAddress)) < 0) {
perror("connect");
exit(1);
}
return sock;
}
int sendCommand(char * host, int port, char * command, char * user,
char * password, char * args, char * response) {
int sock = open_client_socket(host, port);
// Send command
write(sock, command, strlen(command));
write(sock, " ", 1);
write(sock, user, strlen(user));
write(sock, " ", 1);
write(sock, password, strlen(password));
write(sock, " ", 1);
write(sock, args, strlen(args));
write(sock, "\r\n", 2);
// Keep reading until connection is closed or MAX_REPONSE
int n = 0;
int len = 0;
while ((n = read(sock, response + len, MAX_RESPONSE - len))>0) {
len += n;
}
//printf("response:%s\n", response);
close(sock);
}
void printUsage()
{
printf("Usage: talk-client host port user password\n");
exit(1);
}
void add_user(char * host, int port, char * user,
char * password)
{
// Try first to add user in case it does not exist.
char response[MAX_RESPONSE];
sendCommand(host, port, "ADD-USER", user, password, "", response);
if (strcmp(response, "OK\r\n") == 0) {
printf("User %s added\n", user);
}
}
void create_room(char * host, int port, char * user,
char * password, char * args) {
char response[MAX_RESPONSE];
sendCommand(host, port, "CREATE-ROOM", user, password, args, response);
if (strcmp(response, "OK\r\n") == 0) {
printf("User %s added\n", user);
}
}
void enter_room(char * host, int port, char * user,
char * password, char * args) {
char response[MAX_RESPONSE];
sendCommand(host, port, "ENTER-ROOM", user, password, args, response);
if (strcmp(response, "OK\r\n") == 0) {
printf("User %s added\n", user);
}
}
void leave_room(char * host, int port, char * user,
char * password, char * args) {
char response[MAX_RESPONSE];
sendCommand(host, port, "LEAVE-ROOM", user, password, args, response);
if (strcmp(response, "OK\r\n") == 0) {
printf("User %s added\n", user);
}
}
void get_messages() {
char response[MAX_RESPONSE];
sendCommand(host, port, "GET-MESSAGES", user, password, args, response);
if (strcmp(response, "OK\r\n") == 0) {
printf("User %s added\n", user);
}
}
void send_message(char * host, int port, char * user,
char * password, char * args) {
char response[MAX_RESPONSE];
sendCommand(host, port, "SEND-MESSAGE", user, password, args, response);
if (strcmp(response, "OK\r\n") == 0) {
printf("User %s added\n", user);
}
}
void print_users_in_room() {
char response[MAX_RESPONSE];
sendCommand(host, port, "GET-USERS-IN-ROOM", user, password, args, response);
if (strcmp(response, "OK\r\n") == 0) {
printf("User %s added\n", user);
}
}
void print_users() {
// Try first to add user in case it does not exist.
char response[MAX_RESPONSE];
sendCommand(host, port, "GET-ALL-USERS", user, password, "", response);
if (strcmp(response, "OK\r\n") == 0) {
printf("User %s added\n", user);
}
}
void printPrompt() {
printf("talk> ");
fflush(stdout);
}
void printHelp() {
printf("Commands:\n");
printf(" -who - Gets users in room\n");
printf(" -users - Prints all registered users\n");
printf(" -help - Prints this help\n");
printf(" -quit - Leaves the room\n");
printf("Anything that does not start with \"-\" will be a message to the chat room\n");
}
void * getMessagesThread(void * arg) {
// This code will be executed simultaneously with main()
// Get messages to get last message number. Discard the initial Messages
while (1) {
// Get messages after last message number received.
// Print messages
// Sleep for ten seconds
usleep(2 * 1000 * 1000);
}
}
void startGetMessageThread()
{
//pthread_t threads;
pthread_create(NULL, NULL, getMessagesThread, NULL);
}
int main(int argc, char **argv) {
char line[MAX_MESSAGE_LEN + 1];
if (argc < 5) {
printUsage();
}
host = argv[1];
sport = argv[2];
user = argv[3];
password = argv[4];
printf("\nStarting talk-client %s %s %s %s\n", host, sport, user, password);
// Convert port to number
sscanf(sport, "%d", &port);
add_user(host, port, user, password);
create_room(host, port, user, password, "y");
// Enter room
enter_room(host, port, user, password, "y");
// Start message thread
//startGetMessageThread();
while (1) {
printPrompt();
char * s = fgets(line, MAX_MESSAGE_LEN, stdin);
if (s == NULL) {
leave_room(host, port, user, password, "y");
printf("talk-client exiting...\n");
exit(1);
}
if (!isatty(0)) {
// If it is not a terminal, echo command as well
printf("%s\n", line);
}
if (line[0] == '-') {
// This is a command process it
if (!strcmp(line, "-help")) {
printHelp();
}
else if (!strcmp(line, "-quit")) {
printf("talk-client exiting...\n");
exit(1);
}
// Put other commands here
}
else if (line[0] == 0) {
// Empty line. Print help
printf("Type -help to print the available commands\n");
}
else {
// Send message
}
}
printf("TEST ENDS\n");
return 0;
}