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Add monotime_ts and monotime_tv that return monotonic timespec and timeval respectively. Replace calls to gettimeofday() in packet timing with monotime_tv so that the callers will work over a clock step. Should prevent integer overflow during clock steps reported by wangle6 at huawei.com. "I like" markus@ OpenBSD-Commit-ID: 74d684264814ff806f197948b87aa732cb1b0b8a
This commit is contained in:
dtucker@openbsd.org@openbsd.org
Damien Miller
parent
2d638e9860
commit
5db6fbf143
87
misc.c
87
misc.c
@ -1,4 +1,4 @@
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/* $OpenBSD: misc.c,v 1.118 2017/10/25 00:17:08 djm Exp $ */
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/* $OpenBSD: misc.c,v 1.119 2017/11/25 06:46:22 dtucker Exp $ */
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/*
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* Copyright (c) 2000 Markus Friedl. All rights reserved.
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* Copyright (c) 2005,2006 Damien Miller. All rights reserved.
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@ -1259,8 +1259,8 @@ ms_subtract_diff(struct timeval *start, int *ms)
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{
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struct timeval diff, finish;
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gettimeofday(&finish, NULL);
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timersub(&finish, start, &diff);
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monotime_tv(&finish);
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timersub(&finish, start, &diff);
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*ms -= (diff.tv_sec * 1000) + (diff.tv_usec / 1000);
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}
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@ -1273,54 +1273,63 @@ ms_to_timeval(struct timeval *tv, int ms)
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tv->tv_usec = (ms % 1000) * 1000;
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}
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time_t
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monotime(void)
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void
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monotime_ts(struct timespec *ts)
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{
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#if defined(HAVE_CLOCK_GETTIME) && \
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(defined(CLOCK_MONOTONIC) || defined(CLOCK_BOOTTIME))
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struct timespec ts;
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struct timeval tv;
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#if defined(HAVE_CLOCK_GETTIME) && (defined(CLOCK_BOOTTIME) || \
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defined(CLOCK_MONOTONIC) || defined(CLOCK_REALTIME))
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static int gettime_failed = 0;
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if (!gettime_failed) {
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#if defined(CLOCK_BOOTTIME)
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if (clock_gettime(CLOCK_BOOTTIME, &ts) == 0)
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return (ts.tv_sec);
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#endif
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#if defined(CLOCK_MONOTONIC)
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if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
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return (ts.tv_sec);
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#endif
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# ifdef CLOCK_BOOTTIME
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if (clock_gettime(CLOCK_BOOTTIME, ts) == 0)
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return;
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# endif /* CLOCK_BOOTTIME */
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# ifdef CLOCK_MONOTONIC
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if (clock_gettime(CLOCK_MONOTONIC, ts) == 0)
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return;
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# endif /* CLOCK_MONOTONIC */
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# ifdef CLOCK_REALTIME
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/* Not monotonic, but we're almost out of options here. */
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if (clock_gettime(CLOCK_REALTIME, ts) == 0)
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return;
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# endif /* CLOCK_REALTIME */
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debug3("clock_gettime: %s", strerror(errno));
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gettime_failed = 1;
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}
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#endif /* HAVE_CLOCK_GETTIME && (CLOCK_MONOTONIC || CLOCK_BOOTTIME */
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#endif /* HAVE_CLOCK_GETTIME && (BOOTTIME || MONOTONIC || REALTIME) */
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gettimeofday(&tv, NULL);
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ts->tv_sec = tv.tv_sec;
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ts->tv_nsec = (long)tv.tv_usec * 1000;
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}
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return time(NULL);
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void
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monotime_tv(struct timeval *tv)
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{
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struct timespec ts;
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monotime_ts(&ts);
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tv->tv_sec = ts.tv_sec;
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tv->tv_usec = ts.tv_nsec / 1000;
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}
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time_t
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monotime(void)
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{
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struct timespec ts;
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monotime_ts(&ts);
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return ts.tv_sec;
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}
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double
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monotime_double(void)
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{
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#if defined(HAVE_CLOCK_GETTIME) && \
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(defined(CLOCK_MONOTONIC) || defined(CLOCK_BOOTTIME))
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struct timespec ts;
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static int gettime_failed = 0;
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if (!gettime_failed) {
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#if defined(CLOCK_BOOTTIME)
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if (clock_gettime(CLOCK_BOOTTIME, &ts) == 0)
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return (ts.tv_sec + (double)ts.tv_nsec / 1000000000);
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#endif
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#if defined(CLOCK_MONOTONIC)
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if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
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return (ts.tv_sec + (double)ts.tv_nsec / 1000000000);
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#endif
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debug3("clock_gettime: %s", strerror(errno));
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gettime_failed = 1;
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}
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#endif /* HAVE_CLOCK_GETTIME && (CLOCK_MONOTONIC || CLOCK_BOOTTIME */
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return (double)time(NULL);
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monotime_ts(&ts);
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return ts.tv_sec + ((double)ts.tv_nsec / 1000000000);
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}
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void
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@ -1342,7 +1351,7 @@ bandwidth_limit(struct bwlimit *bw, size_t read_len)
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struct timespec ts, rm;
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if (!timerisset(&bw->bwstart)) {
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gettimeofday(&bw->bwstart, NULL);
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monotime_tv(&bw->bwstart);
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return;
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}
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@ -1350,7 +1359,7 @@ bandwidth_limit(struct bwlimit *bw, size_t read_len)
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if (bw->lamt < bw->thresh)
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return;
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gettimeofday(&bw->bwend, NULL);
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monotime_tv(&bw->bwend);
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timersub(&bw->bwend, &bw->bwstart, &bw->bwend);
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if (!timerisset(&bw->bwend))
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return;
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@ -1384,7 +1393,7 @@ bandwidth_limit(struct bwlimit *bw, size_t read_len)
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}
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bw->lamt = 0;
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gettimeofday(&bw->bwstart, NULL);
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monotime_tv(&bw->bwstart);
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}
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/* Make a template filename for mk[sd]temp() */
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4
misc.h
4
misc.h
@ -1,4 +1,4 @@
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/* $OpenBSD: misc.h,v 1.67 2017/10/25 00:17:08 djm Exp $ */
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/* $OpenBSD: misc.h,v 1.68 2017/11/25 06:46:22 dtucker Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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@ -67,6 +67,8 @@ char *tohex(const void *, size_t);
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void sanitise_stdfd(void);
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void ms_subtract_diff(struct timeval *, int *);
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void ms_to_timeval(struct timeval *, int);
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void monotime_ts(struct timespec *);
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void monotime_tv(struct timeval *);
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time_t monotime(void);
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double monotime_double(void);
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void lowercase(char *s);
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6
packet.c
6
packet.c
@ -1,4 +1,4 @@
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/* $OpenBSD: packet.c,v 1.266 2017/10/25 00:17:08 djm Exp $ */
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/* $OpenBSD: packet.c,v 1.267 2017/11/25 06:46:22 dtucker Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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@ -1332,7 +1332,7 @@ ssh_packet_read_seqnr(struct ssh *ssh, u_char *typep, u_int32_t *seqnr_p)
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for (;;) {
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if (state->packet_timeout_ms != -1) {
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ms_to_timeval(&timeout, ms_remain);
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gettimeofday(&start, NULL);
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monotime_tv(&start);
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}
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if ((r = select(state->connection_in + 1, setp,
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NULL, NULL, timeoutp)) >= 0)
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@ -1959,7 +1959,7 @@ ssh_packet_write_wait(struct ssh *ssh)
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for (;;) {
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if (state->packet_timeout_ms != -1) {
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ms_to_timeval(&timeout, ms_remain);
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gettimeofday(&start, NULL);
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monotime_tv(&start);
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}
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if ((ret = select(state->connection_out + 1,
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NULL, setp, NULL, timeoutp)) >= 0)
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@ -1,4 +1,4 @@
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/* $OpenBSD: ssh-keyscan.c,v 1.115 2017/06/30 04:17:23 dtucker Exp $ */
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/* $OpenBSD: ssh-keyscan.c,v 1.116 2017/11/25 06:46:22 dtucker Exp $ */
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/*
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* Copyright 1995, 1996 by David Mazieres <dm@lcs.mit.edu>.
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*
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@ -377,7 +377,7 @@ conalloc(char *iname, char *oname, int keytype)
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fdcon[s].c_len = 4;
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fdcon[s].c_off = 0;
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fdcon[s].c_keytype = keytype;
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gettimeofday(&fdcon[s].c_tv, NULL);
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monotime_tv(&fdcon[s].c_tv);
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fdcon[s].c_tv.tv_sec += timeout;
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TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
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FD_SET(s, read_wait);
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@ -411,7 +411,7 @@ static void
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contouch(int s)
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{
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TAILQ_REMOVE(&tq, &fdcon[s], c_link);
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gettimeofday(&fdcon[s].c_tv, NULL);
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monotime_tv(&fdcon[s].c_tv);
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fdcon[s].c_tv.tv_sec += timeout;
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TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
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}
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@ -545,7 +545,7 @@ conloop(void)
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con *c;
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int i;
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gettimeofday(&now, NULL);
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monotime_tv(&now);
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c = TAILQ_FIRST(&tq);
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if (c && (c->c_tv.tv_sec > now.tv_sec ||
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@ -1,4 +1,4 @@
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/* $OpenBSD: sshconnect.c,v 1.287 2017/09/14 04:32:21 djm Exp $ */
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/* $OpenBSD: sshconnect.c,v 1.288 2017/11/25 06:46:22 dtucker Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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@ -344,7 +344,7 @@ waitrfd(int fd, int *timeoutp)
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struct timeval t_start;
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int oerrno, r;
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gettimeofday(&t_start, NULL);
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monotime_tv(&t_start);
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pfd.fd = fd;
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pfd.events = POLLIN;
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for (; *timeoutp >= 0;) {
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