/*
* Mausezahn - A fast versatile traffic generator
* Copyright (C) 2008-2010 Herbert Haas
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 2 as published by the
* Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, see http://www.gnu.org/licenses/gpl-2.0.html
*
*/
#include "mz.h"
// Check if current system supports the nanosecond timer functions.
// Additionally, measure the precision.
// This function should be called upon program start.
//
int check_timer()
{
struct timespec res;
int r;
// Check if the glibc is recent enough:
#ifdef _POSIX_C_SOURCE
if (_POSIX_C_SOURCE >= 199309L) {
r = clock_getres(CLOCK_MONOTONIC, &res);
if (r!=0) perror(" mz/check_timer:");
if (verbose) {
fprintf(stderr, " This system supports a high resolution clock.\n");
fprintf(stderr, " The clock resolution is %li nanoseconds.\n",
res.tv_nsec);
}
}
else {
fprintf(stderr,
" WARNING: Your system does NOT support the newer high resolution clock\n"
" Please inform the author: herbert@perihel.at\n");
exit(1);
}
#endif
return 0;
}
// This is the replacement for gettimeofday() which would result in 'jumps' if
// the system clock is adjusted (e. g. via a NTP process) and finally the jitter
// measurement would include wrong datapoints.
//
// Furthermore the function below utilizes the newer hi-res nanosecond timers.
inline void getcurtime (struct mz_timestamp *t)
{
struct timespec ct;
clock_gettime(CLOCK_MONOTONIC, &ct);
t->sec = ct.tv_sec;
t->nsec = ct.tv_nsec;
}
//////////////////////////////////////////////////////////////////////////////////////
// Purpose: Calculate time deltas of two timestamps stored in struct timeval.
//
// Subtract the "struct timeval" values X and Y, storing the result in RESULT,
// i. e. X-Y=RESULT.
//
// RETURN VALUES:
//
// Sign: 1 = negative, 0 = positive
// Error: -1 due to a wrong timestamp (i. e. nsec > 999999999L)
//
inline int timestamp_subtract (struct mz_timestamp *x, struct mz_timestamp *y, struct mz_timestamp *result)
{
int32_t ndiff;
int sign=0, carry=0;
// Check for wrong timestamps
if ((x->nsec>999999999L) || (y->nsec>999999999L)) return -1;
if (y->sec > x->sec) sign=1;
else if ((y->sec == x->sec) && (y->nsec > x->nsec)) sign=1;
ndiff = x->nsec - y->nsec;
if ((ndiff>0) && (sign)) carry=1;
if ((ndiff<0) && (sign)) ndiff = y->nsec - x->nsec;
if ((ndiff<0) && (!sign)) {
ndiff = 1000000000L + ndiff;
carry=1;
}
if (sign)
result->sec = y->sec - x->sec - carry;
else
result->sec = x->sec - y->sec - carry;
result->nsec = ndiff;
return sign;
}
// Add two variables of type struct mz_timestamp: x+y=result.
//
inline void timestamp_add (struct mz_timestamp *x, struct mz_timestamp *y, struct mz_timestamp *result)
{
int carry=0;
u_int32_t c;
c = x->nsec + y->nsec;
if (c>999999999L) {
carry=1;
result->nsec =c-1000000000;
} else result->nsec =c;
result->sec = x->sec + y->sec + carry;
}
// Returns a human readable timestamp in the string result.
// Optionally a prefix can be specified, for example if the
// timestamp is part of a filename.
//
// Example:
// char myTimeStamp[128];
//
// timestamp_human(myTimeStamp, NULL);
//
// => "20080718_155521"
//
// /* or with prefix */
//
// timestamp_human(myTimeStamp, "MZ_RTP_jitter_");
//
// => "MZ_RTP_jitter_20080718_155521"
//
int timestamp_human(char* result, const char* prefix)
{
time_t curtime;
struct tm curtime_broken;
char curtime_str[32];
time(&curtime);
localtime_r (&curtime, &curtime_broken);
sprintf(curtime_str, "%4i%02i%02i-%02i%02i%02i",
curtime_broken.tm_year+1900,
curtime_broken.tm_mon+1,
curtime_broken.tm_mday,
curtime_broken.tm_hour,
curtime_broken.tm_min,
curtime_broken.tm_sec);
if (prefix==NULL)
{
strncpy(result, curtime_str, 32);
}
else
{
strncpy(result, prefix, 32);
strncat(result, curtime_str, 32);
}
return 0;
}
// Creates a human readable timestamp in the string result.
// Optionally a prefix can be specified, for example if the
// timestamp is part of a filename.
//
// Example:
// char myTimeStamp[9];
//
// timestamp_hms (myTimeStamp);
//
// => "15:55:21"
int timestamp_hms(char* result)
{
time_t curtime;
struct tm curtime_broken;
char curtime_str[32];
time(&curtime);
localtime_r (&curtime, &curtime_broken);
sprintf(curtime_str, "%02i:%02i:%02i",
curtime_broken.tm_hour,
curtime_broken.tm_min,
curtime_broken.tm_sec);
strncpy(result, curtime_str, 9);
return 0;
}
ass='commit-msg'>The MAC address of the physical interface is only copied to the VLAN
when it is first created, resulting in an inconsistency after MAC
address changes of only newly created VLANs having an up-to-date MAC.
The VLANs should continue inheriting the MAC address of the physical
interface until the VLAN MAC address is explicitly set to any value.
This allows IPv6 EUI64 addresses for the VLAN to reflect any changes
to the MAC of the physical interface and thus for DAD to behave as
expected.
Signed-off-by: Mike Manning <mmanning@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>