// Reliably sends an array of packets
void rdt_send_packets(struct packet *packets, int sockfd, struct sockaddr_in cli_addr, socklen_t clilen, int cwndsize)
{
int nextseqnum = 0;
int base = 0;
int all_sent = 0;
int i;
int timer_running = 0;
clock_t timer_start = 0;
while(!all_sent || (base < nextseqnum)) {
while (nextseqnum < base + cwndsize && !all_sent) {
send_packet(packets[nextseqnum], sockfd, cli_addr, clilen);
if (base == nextseqnum) {
timer_running = 1;
timer_start = clock();
}
if (packets[nextseqnum].type == TYPE_FINAL_DATA) {
all_sent = 1;
nextseqnum++;
break;
}
nextseqnum++;
}
int ack = listen_for_ack(sockfd);
if (ack != -99) {
base = ack + 1;
if (base == nextseqnum) {
timer_running = 0;
}
else {
timer_running = 1;
timer_start = clock();
}
}
// Check for timeout
// fprintf(stderr, "timer_running: %d. diff: %f. RTO: %d\n", timer_running, diff_ms(timer_start, clock()), RETRANSMIT_TIMEOUT);
if (timer_running && ( diff_ms(timer_start, clock()) > RETRANSMIT_TIMEOUT ) ) {
printf("Timeout on packet %d. Retransmitting packet(s) %d to %d:\n", base, base, nextseqnum-1);
timer_running = 1;
timer_start = clock();
for (i = base; i < nextseqnum; i++) {
send_packet(packets[i], sockfd, cli_addr, clilen);
}
}
}
}
void read_file(int n){
if( !feof(fp) ){
int i;
for(i =0; i < n; i++ ){
bzero(buffer,191);
fread(buffer,sizeof(char),191,fp);
send_data(i);
}
listen_for_ack();
}
}
