busybox.git/networking/ntpd.c, branch master

ntpd: set tmx.maxerror properly - avoid STA_UNSYNC

2025-10-11T21:48:04+00:00

function                                             old     new   delta
update_local_clock                                   872     951     +79

Signed-off-by: Denys Vlasenko

ntpd: replace two bb_info_msg's with bb_error_msg

2025-07-18T08:34:17+00:00

All other messages are printed via bb_error_msg in this applet.

Signed-off-by: Denys Vlasenko

ntpd: Raise MAXDIST to 3s for better tolerance and consistency with chrony

2025-07-01T11:30:40+00:00

function                                             old     new   delta
select_and_cluster                                  1088    1093      +5

Signed-off-by: Michael Glembotzki 
Signed-off-by: Denys Vlasenko

ntpd: fix a warning on 32-bit arch build

2023-07-10T15:29:38+00:00

Signed-off-by: Denys Vlasenko

Update applet size estimates

2023-07-10T15:25:21+00:00

Signed-off-by: Denys Vlasenko

ntpd: correct comment: 2^-20 is ~1 microsecond (confused with 10^-20)

2023-01-18T17:04:22+00:00

Signed-off-by: Denys Vlasenko

ntpd: fold d_to_tv() into its only caller

2023-01-18T16:42:17+00:00

Signed-off-by: Denys Vlasenko

ntpd: correct fixed->float conversions of fractions

2023-01-17T16:01:05+00:00

Need to divide by (1<<32), not by (1<<32)-1.
Fraction of 0xffffffff is not 1 whole second.

function                                             old     new   delta
.rodata                                           105264  105268      +4

Signed-off-by: Denys Vlasenko

ntpd: make NTP client and server Y2036/2038-ready

2023-01-17T15:48:54+00:00

The 32-bit integer part of the NTP timestamp overflows in year 2036,
which starts the second NTP era.

Modify the timestamp conversion to shift values between 1900-1970 (in
the first era) to the second era to enable the client to measure its
offset correctly until year 2106 (assuming 64-bit time_t).

Also update the conversion from double used when stepping the clock to
work with 64-bit time_t after reaching the maximum 32-bit value in 2038
and the server conversion to work correctly in the next NTP era.

function                                             old     new   delta
lfp_to_d                                              51      64     +13
step_time                                            326     332      +6
.rodata                                           105260  105264      +4
d_to_lfp                                             100      86     -14
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/1 up/down: 23/-14)              Total: 9 bytes

Signed-off-by: Miroslav Lichvar 
Signed-off-by: Denys Vlasenko

*: add NOINLINEs where code noticeably shrinks

2021-10-10T11:50:53+00:00

function                                             old     new   delta
display                                               85    1463   +1378  -73 bytes
select_and_cluster                                     -    1088   +1088 -139 bytes
parse_reply                                            -     979    +979 -109 bytes
zbc_num_sqrt                                           -     632    +632 -191 bytes
show_bridge_port                                       -     585    +585  -56 bytes
sp_256_proj_point_add_8                                -     576    +576  -45 bytes
encode_then_append_var_plusminus                       -     554    +554 -118 bytes
read_mode_db                                           -     537    +537  -47 bytes
fbset_main                                          1331     747    -584
sp_256_ecc_mulmod_8                                 1157     536    -621
brctl_main                                          2189    1548    -641
expand_one_var                                      2544    1872    -672
zxc_vm_process                                      6412    5589    -823
send_queries                                        1813     725   -1088
recv_and_process_peer_pkt                           2245    1018   -1227
bb_dump_dump                                        1531      80   -1451
------------------------------------------------------------------------------
(add/remove: 7/0 grow/shrink: 1/8 up/down: 6329/-7107)       Total: -778 bytes

Signed-off-by: Denys Vlasenko