void __attribute__ ((interrupt(USCIAB0RX_VECTOR))) USCI0RX_ISR (void)
#else
#error Compiler not supported!
#endif
{
if(receiver_handler(UCA0RXBUF)) {
// receiver_handler return 1 if need to handle command, so wake up
__bic_SR_register_on_exit(LPM0_bits + GIE);
}
}
int main() {
int i;
char command[50];
char tmp[50];
char action[30];
fd_set read_fds;
char *tok = NULL;
FD_ZERO(&master); // clear the master and temp sets
FD_ZERO(&read_fds);
FD_SET(0, &master);
fqueue_init(&fqueue, WINDOWSIZE);
fqueue_init(&pqueue, WINDOWSIZE);
printf("Client is ready!\n");
printf("please input frame loss rate (%%): ");
gets(command);
erate = atoi(command);
printf("please input frame corruption rate (%%): ");
gets(command);
corrupted = atoi(command);
printf("please choose retransmission mode(0: go-back-N; 1: selective repeat): \n");
gets(command);
di.erate = erate;
di.corrupted = corrupted;
di.retrans_mode = retransmission_mode;
retransmission_mode = atoi(command);
if(retransmission_mode == 1) {
fqueue.maxsize = 5;
}
int status = 0; //0->not connected; 1->connected;
while(status == 0) {
printf("Please input command to connect to server:(CONNECT hostname)\n ");
gets(command);
strcpy(tmp, command);
//expect CONNECT command
tok = strtok(tmp, " ");
if(tok == NULL) {
printf("Input the wrong command, please try again!\n");
continue;
}
strcpy(action, tok);
if(strcmp(action, "CONNECT") == 0) {
char hostname[50];
tok = strtok(NULL, " ");
if(tok) {
strcpy(hostname, tok);
} else {
printf("Input the wrong command, please try again!\n");
continue;
}
if((sockfd = connect_to_server(hostname)) == -1) {
perror("connect");
continue;
}
FD_SET(0, &master);
FD_SET(sockfd, &master);
fdmax = sockfd;
break;
}
}
//set up a timer
signal(SIGALRM, scheduled_handler);
sigemptyset(&sigs);
sigaddset(&sigs, SIGALRM);
struct itimerval tt;
tt.it_interval.tv_sec = 0;
tt.it_interval.tv_usec = TIMER_TICK;
tt.it_value.tv_sec = 0;
tt.it_value.tv_usec = TIMER_TICK;
if (setitimer(ITIMER_REAL, &tt, NULL) < 0) {
perror("sender: setitimer");
exit(1);
}
while(1) {
read_fds = master;
if (select(fdmax+1, &read_fds, NULL, NULL, NULL) == -1) {
//perror("select");
continue;
//exit(4);
}
// run through the existing connections looking for data to read
for(i = 0; i <= fdmax; i++) {
if(FD_ISSET(i, &read_fds)) {
if(i==0) {
gets(command);
run_command(command);
} else {
//handle data from a client
receiver_handler(i);
DataLinkRecv();
}
}
}
}
}
