void print_statistics(int socktype, struct timeval start, struct timeval end, int total_bytes, int io) {
int i;
struct s_time_record *record;
struct timeval tdiff, total_delay, avg_delay, sqrsum;// sdiv, tmp;
int npackets = 0;
double t_delay, t_avg, t_total;
record = time_record_head.next;
int last_seq = 1;
struct s_seqlist *seqlist;
total_delay.tv_sec = 0;
total_delay.tv_usec = 0;
sqrsum.tv_sec = 0;
sqrsum.tv_usec = 0;
while(record != NULL) {
/*
printf("%i ", record->seq);
if(seqformat++ == 10) {
printf("\n");
seqformat = 0;
}*/
if(socktype == SOCK_DGRAM) {
/* save potentially lost sequence numbers */
for(i = last_seq + 1; i < record->seq; i++)
insert_seq(i);
/* saved sequence number found. Delete it from lost-seq-number list */
if(last_seq > record->seq)
delete_seq(record->seq);
last_seq = record->seq;
}
tvsub(&tdiff, &(record->my_time), &(record->his_time)); /* delay */
tvadd(&total_delay, &total_delay, &tdiff); /* sum delay */
npackets++;
record = record->next;
}
avg_delay.tv_sec = total_delay.tv_sec / npackets;
avg_delay.tv_usec = total_delay.tv_usec / npackets;
/*
//standard diviation:
record = time_record_head.next;
while(record != NULL) {
tvsub(&tdiff, &(record->my_time), &(record->his_time)); //delay
tvsub(&tmp, &tdiff, &avg_delay); // x1 - mü
tvsqr(&tmp); // (x - mü)^2
tvadd(&sdiv, &tmp);
record = record->next;
}*/
tvsub(&tdiff, &end, &start);
t_avg = tvtosec(&avg_delay);
t_total = tvtosec(&tdiff);
t_delay = tvtosec(&total_delay);
printf("\n\nprinting statistics:\n" \
"--------------------------\n");
printf("%i bytes received in %.2f seconds\n", total_bytes, t_total);
printf("I/O calls: %i\n", io);
printf("packets received: %i\n", npackets);
printf("total delay: %.2f seconds\n", t_delay);
printf("average delay: %f seconds\n", t_avg);
/* printf("standard diviation: %ld seconds, %ld microseconds\n", sdiv.tv_sec / npackets,
sdiv.tv_usec / npackets); */
/* print lost packets (only UDP) */
if(socktype == SOCK_DGRAM) {
seqlist = seqlist_head.next;
if(seqlist == NULL)
printf("No packet loss\n");
else {
int format = 0;
int packetloss = 0;
printf("\nPackets with the following sequence numbers are lost:\n\n");
while(seqlist != NULL) {
packetloss++;
printf("%i ", seqlist->val);
seqlist = seqlist->next;
if(format++ == 10) {
printf("\n");
format = 0;
}
}
printf("\n\nNumber of packets lost: %i\n", packetloss);
}
}
printf("\n\n");
}
/**********************************************************************
* Function util_menu()
*
* Parameter:
*
*
* This function is the backbone of the interface. All file input/ouput
* happens here. This is also where the user can key in their own string
* if desired. Here the user can view, delete and list the available
* sequences.
*
*
**********************************************************************/
void util_menu()
{
int num_seqs, num_lines;
while (1) {
num_seqs = get_num_sequences();
num_lines = 14;
printf("\n** String Utilites Menu **\n\n");
printf("1) Read formatted file\n");
printf("2) Read unformatted file\n");
printf("3) Create new sequence\n");
if (num_seqs == 0)
printf("4) List sequences (currently available: None)\n");
else
printf("4) List sequences (currently available: 1 - %d)\n", num_seqs);
printf("5) Print sequence\n");
printf("6) Save sequences\n");
printf("7) Delete sequences\n");
printf("8) Set output options\n");
printf("0) Exit\n");
printf("\nEnter Selection: ");
while ((choice = my_getline(stdin, &ch_len)) == NULL) ;
switch (choice[0]) {
case '0':
return;
case '1':
fread_formatted();
break;
case '2':
fread_unformatted();
break;
case '3':
type_in_seq();
break;
case '4':
list_sequences(num_lines);
break;
case '5':
print_seq(num_lines);
break;
case '6':
fwrite_formatted();
break;
case '7':
delete_seq();
break;
case '8':
set_display_options();
break;
default:
printf("\nThat is not a choice.\n");
}
}
}
