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121 lines
3.8 KiB
Diff
121 lines
3.8 KiB
Diff
From d0e66e0719ae8eb549f7cc220fdc66575d3db332 Mon Sep 17 00:00:00 2001
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From: Jonas Gorski <jonas.gorski@gmail.com>
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Date: Thu, 29 Mar 2012 17:01:11 +0200
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Subject: [PATCH 4/4] use monotic clock instead of time of day
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The time of day might chance e.g. by daylight savings time during the
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runtime, which causes timers to fire repeatedly for a long time.
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Contributed by T-Labs, Deutsche Telekom Innovation Laboratories
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Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
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---
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configure.ac | 2 ++
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src/igmpproxy.c | 26 +++++++++++++-------------
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src/igmpproxy.h | 3 ++-
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3 files changed, 17 insertions(+), 14 deletions(-)
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diff --git a/configure.ac b/configure.ac
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index 85beb08..bd84eba 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -25,6 +25,8 @@ AC_CHECK_MEMBERS([struct sockaddr_in.sin_len], [], [], [[
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#include <netinet/in.h>
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]])
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+AC_SEARCH_LIBS([clock_gettime],[rt])
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+
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AC_CONFIG_FILES([
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Makefile
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doc/Makefile
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diff --git a/src/igmpproxy.c b/src/igmpproxy.c
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index 35000c7..3a9ccad 100644
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--- a/src/igmpproxy.c
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+++ b/src/igmpproxy.c
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@@ -234,13 +234,13 @@ void igmpProxyRun() {
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int MaxFD, Rt, secs;
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fd_set ReadFDS;
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socklen_t dummy = 0;
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- struct timeval curtime, lasttime, difftime, tv;
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+ struct timespec curtime, lasttime, difftime, tv;
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// The timeout is a pointer in order to set it to NULL if nessecary.
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- struct timeval *timeout = &tv;
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+ struct timespec *timeout = &tv;
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// Initialize timer vars
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- difftime.tv_usec = 0;
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- gettimeofday(&curtime, NULL);
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+ difftime.tv_nsec = 0;
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+ clock_gettime(CLOCK_MONOTONIC, &curtime);
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lasttime = curtime;
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// First thing we send a membership query in downstream VIF's...
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@@ -263,7 +263,7 @@ void igmpProxyRun() {
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if(secs == -1) {
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timeout = NULL;
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} else {
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- timeout->tv_usec = 0;
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+ timeout->tv_nsec = 0;
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timeout->tv_sec = secs;
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}
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@@ -274,7 +274,7 @@ void igmpProxyRun() {
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FD_SET( MRouterFD, &ReadFDS );
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// wait for input
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- Rt = select( MaxFD +1, &ReadFDS, NULL, NULL, timeout );
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+ Rt = pselect( MaxFD +1, &ReadFDS, NULL, NULL, timeout, NULL );
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// log and ignore failures
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if( Rt < 0 ) {
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@@ -307,20 +307,20 @@ void igmpProxyRun() {
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*/
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if (Rt == 0) {
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curtime.tv_sec = lasttime.tv_sec + secs;
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- curtime.tv_usec = lasttime.tv_usec;
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+ curtime.tv_nsec = lasttime.tv_nsec;
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Rt = -1; /* don't do this next time through the loop */
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} else {
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- gettimeofday(&curtime, NULL);
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+ clock_gettime(CLOCK_MONOTONIC, &curtime);
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}
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difftime.tv_sec = curtime.tv_sec - lasttime.tv_sec;
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- difftime.tv_usec += curtime.tv_usec - lasttime.tv_usec;
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- while (difftime.tv_usec > 1000000) {
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+ difftime.tv_nsec += curtime.tv_nsec - lasttime.tv_nsec;
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+ while (difftime.tv_nsec > 1000000000) {
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difftime.tv_sec++;
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- difftime.tv_usec -= 1000000;
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+ difftime.tv_nsec -= 1000000000;
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}
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- if (difftime.tv_usec < 0) {
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+ if (difftime.tv_nsec < 0) {
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difftime.tv_sec--;
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- difftime.tv_usec += 1000000;
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+ difftime.tv_nsec += 1000000000;
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}
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lasttime = curtime;
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if (secs == 0 || difftime.tv_sec > 0)
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diff --git a/src/igmpproxy.h b/src/igmpproxy.h
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index 4df8a79..36a4f04 100644
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--- a/src/igmpproxy.h
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+++ b/src/igmpproxy.h
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@@ -44,12 +44,13 @@
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#include <string.h>
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#include <fcntl.h>
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#include <stdbool.h>
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+#include <time.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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-#include <sys/time.h>
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#include <sys/ioctl.h>
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#include <sys/param.h>
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+#include <sys/select.h>
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#include <net/if.h>
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#include <netinet/in.h>
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--
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1.7.2.5
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