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30 lines
1.2 KiB
Diff
30 lines
1.2 KiB
Diff
From b7841cf7b919b16d1bd4619154bf7cb4c22b4ccd Mon Sep 17 00:00:00 2001
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From: Paul Marks <paul@pmarks.net>
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Date: Mon, 14 Jan 2013 01:39:10 +0000
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Subject: ntpd: fix incorrect m_status field in outgoing packets. Closes 5120
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When using busybox ntpd with an NTPv3 client and NTPv4 server (or vice
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versa), the version numbers can be incorrectly ORed together, yielding
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the bogus value of "NTPv7". This makes ntpd unusable with clients
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such as Chrony and Windows "Internet Time".
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This patch avoids the version mangling, by copying only the Leap
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Indicator bits from the server's status field.
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Signed-off-by: Paul Marks <paul@pmarks.net>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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---
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(limited to 'networking/ntpd.c')
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--- a/networking/ntpd.c
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+++ b/networking/ntpd.c
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@@ -1794,7 +1794,7 @@ recv_and_process_client_pkt(void /*int f
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/* Build a reply packet */
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memset(&msg, 0, sizeof(msg));
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- msg.m_status = G.stratum < MAXSTRAT ? G.ntp_status : LI_ALARM;
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+ msg.m_status = G.stratum < MAXSTRAT ? (G.ntp_status & LI_MASK) : LI_ALARM;
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msg.m_status |= (query_status & VERSION_MASK);
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msg.m_status |= ((query_status & MODE_MASK) == MODE_CLIENT) ?
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MODE_SERVER : MODE_SYM_PAS;
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