int setTimeBasicMode () {
// Getting time from server
// ===========================================
struct tm * time_server;
time_server = (struct tm *) malloc(sizeof(struct tm));
time_server = getTimeFromServer();
// Set time on local machine
// ===========================================
setTimeOnMachine(time_server);
// Console output:
// Server Timestamp
// ===========================================
printf("%s", asctime( time_server ) );
}
int main(int argc, char *argv[]) //1, Server IP;
{
int sockfd;
struct sockaddr_in serverAddr;
if(argc != 2)//TODO: need modify;
{
printf("Need args: Server_IP");
return -1;
}
if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
printf("Error: Fail to create socket. ERRNO: %d\n", errno);
return -1;
}
//Set server ip & port
//bzero(&serverAddr, sizeof(serverAddr));
serverAddr.sin_family = AF_INET;
serverAddr.sin_addr.s_addr = inet_addr(argv[1]);
serverAddr.sin_port = htons(2100);
bzero(&(serverAddr.sin_zero), 8);
//msgq
int msgId = msgget(MSGKEY, IPC_CREAT | 0666);
if(msgId < 0)
{
printf("ERROR: Cannot create the message queue. ERRNO: %d.\n", errno);
return -1;
}
int selectOption = 0;
printMenu();
scanf("%d", &selectOption);
while(selectOption != 7)
{
switch(selectOption)
{
case 1:
connectToServer(sockfd, &serverAddr);
break;
case 2:
disconnectFromServer(sockfd, serverAddr);
break;
case 3:
getTimeFromServer(sockfd, serverAddr);
//printMsg(msgId);
break;
case 4:
getNameFromServer(sockfd, serverAddr);
//printMsg(msgId);
break;
case 5:
getClientsFromServer(sockfd, serverAddr);
//printMsg(msgId);
break;
case 6:
sendMsgToAnotherClient(sockfd, serverAddr);
//printMsg(msgId);
break;
}
scanf("%d", &selectOption);
}
if(currentStatus)
disconnectFromServer(sockfd, serverAddr);
printf("Bye!\n");
return 0;
}
int setTimeChristianMode () {
time_t rawtime;
int sec_before, sec_after;
// Getting local time before request
// ===========================================
struct tm * time_before_request;
time ( &rawtime );
time_before_request = localtime ( &rawtime );
sec_before = time_before_request->tm_sec;
// usleep(6500000); // DEBUG 1,5 second
// Getting time from server
// ===========================================
struct tm * time_server;
time_server = (struct tm *) malloc(sizeof(struct tm));
time_server = getTimeFromServer();
// Getting local time after request
// ===========================================
struct tm * time_after_request;
time ( &rawtime );
time_after_request = localtime ( &rawtime );
sec_after = time_after_request->tm_sec;
// Check if it's same minute before and
// after request. Try again if is equals.
// ===========================================
if (time_before_request->tm_min != time_after_request->tm_min) {
setTimeChristianMode ();
exit(0);
}
// Chistian Algorithm
// ===========================================
// Check drift rate in seconds
float drift_rate = ( (float)(sec_after - sec_before) )/2;
// Set time with drift rate fix
time_server->tm_sec = time_server->tm_sec + drift_rate;
// Check if seconds is higher than 59
// Try again if is.
// ===========================================
if (time_server->tm_sec > 59) {
setTimeChristianMode ();
exit(0);
}
// Set time on local machine
// ===========================================
setTimeOnMachine(time_server);
// Console output:
// Server Timestamp
// ===========================================
printf("%s", asctime( time_server ) );
// DEBUG
// printf("Second before : %d\n", sec_before);
// printf("Second after : %d\n", sec_after);
// printf("drift_rate float : %f\n", drift_rate);
// printf("drift_rate int : %d\n", (int)drift_rate);
}
