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ntpd: add comment about mode6, no code changes

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2019-07-02 15:03:47 +02:00
parent c0961e09b2
commit b694608429
1 changed files with 7 additions and 0 deletions
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7
networking/ntpd.c
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@ -2238,6 +2238,13 @@ recv_and_process_client_pkt(void /*int fd*/)
from = xzalloc(to->len); from = xzalloc(to->len);
size = recv_from_to(G_listen_fd, &msg, sizeof(msg), MSG_DONTWAIT, from, &to->u.sa, to->len); size = recv_from_to(G_listen_fd, &msg, sizeof(msg), MSG_DONTWAIT, from, &to->u.sa, to->len);
/* "ntpq -p" (4.2.8p13) sends a 12-byte NTPv2 request:
* m_status is 0x16: leap:0 version:2 mode:6(reserved1)
* https://docs.ntpsec.org/latest/mode6.html
* We don't support this.
*/
#if ENABLE_FEATURE_NTP_AUTH #if ENABLE_FEATURE_NTP_AUTH
if (size != NTP_MSGSIZE_NOAUTH && size != NTP_MSGSIZE_MD5_AUTH && size != NTP_MSGSIZE_SHA1_AUTH) if (size != NTP_MSGSIZE_NOAUTH && size != NTP_MSGSIZE_MD5_AUTH && size != NTP_MSGSIZE_SHA1_AUTH)
#else #else