100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
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/*
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* $smu-mark$
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* $name: rtt.c$
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* $author: Salvatore Sanfilippo <antirez@invece.org>$
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* $copyright: Copyright (C) 1999 by Salvatore Sanfilippo$
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* $license: This software is under GPL version 2 of license$
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* $date: Fri Nov 5 11:55:49 MET 1999$
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* $rev: 3$
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*/
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#include <time.h>
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#include <stdio.h>
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#include "hping2.h"
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#include "globals.h"
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void minavgmax(float ms_delay)
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{
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static int avg_counter = 0;
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if (rtt_min == 0 || ms_delay < rtt_min)
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rtt_min = ms_delay;
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if (rtt_max == 0 || ms_delay > rtt_max)
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rtt_max = ms_delay;
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avg_counter++;
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rtt_avg = (rtt_avg*(avg_counter-1)/avg_counter)+(ms_delay/avg_counter);
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}
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int rtt(int *seqp, int recvport, float *ms_delay)
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{
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long sec_delay = 0, usec_delay = 0;
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int i, tablepos = -1, status;
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if (*seqp != 0) {
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for (i = 0; i < TABLESIZE; i++)
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if (delaytable[i].seq == *seqp) {
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tablepos = i;
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break;
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}
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} else {
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for (i=0; i<TABLESIZE; i++)
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if (delaytable[i].src == recvport) {
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tablepos = i;
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break;
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}
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if (i != TABLESIZE)
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*seqp = delaytable[i].seq;
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}
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if (tablepos != -1)
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{
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status = delaytable[tablepos].status;
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delaytable[tablepos].status = S_RECV;
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sec_delay = time(NULL) - delaytable[tablepos].sec;
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usec_delay = get_usec() - delaytable[tablepos].usec;
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if (sec_delay == 0 && usec_delay < 0)
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usec_delay += 1000000;
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*ms_delay = (sec_delay * 1000) + ((float)usec_delay / 1000);
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minavgmax(*ms_delay);
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}
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else
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{
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*ms_delay = 0; /* not in table.. */
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status = 0; /* we don't know if it's DUP */
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}
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/* SANITY CHECK */
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if (*ms_delay < 0)
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{
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printf("\n\nSANITY CHECK in rtt.c FAILED!\n");
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printf("- seqnum = %d\n", *seqp);
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printf("- status = %d\n", status);
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printf("- get_usec() = %ld\n", (long int) get_usec());
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printf("- delaytable.usec = %ld\n",
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(long int) delaytable[tablepos].usec);
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printf("- usec_delay = %ld\n", usec_delay);
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printf("- time(NULL) = %ld\n", (long int) time(NULL));
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printf("- delaytable.sec = %ld\n",
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(long int) delaytable[tablepos].sec);
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printf("- sec_delay = %ld\n", sec_delay);
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printf("- ms_delay = %f\n", *ms_delay);
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printf("END SANITY CHECK REPORT\n\n");
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}
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return status;
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}
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void delaytable_add(int seq, int src, time_t sec, time_t usec, int status)
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{
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delaytable[delaytable_index % TABLESIZE].seq = seq;
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delaytable[delaytable_index % TABLESIZE].src = src;
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delaytable[delaytable_index % TABLESIZE].sec = sec;
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delaytable[delaytable_index % TABLESIZE].usec = usec;
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delaytable[delaytable_index % TABLESIZE].status = status;
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delaytable_index++;
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}
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