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ntp: change auto_offline to trigger on failed transmissions

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Instead of counting missing responses, switch to the offline state
immediately when sendmsg() fails.

This makes the option usable with servers and networks that may drop
packets, and the effect will be consistent with the onoffline command.
This commit is contained in:
Miroslav Lichvar
2018-05-24 17:29:15 +02:00
parent 8a57a28177
commit 7637faa0d0
2 changed files with 13 additions and 12 deletions
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14
ntp_core.c
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@@ -89,8 +89,8 @@ struct NCR_Instance_Record {
int tx_suspended; /* Boolean indicating we can't transmit yet */
int auto_burst; /* If 1, initiate a burst on each poll */
int auto_offline; /* If 1, automatically go offline if server/peer
isn't responding */
int auto_offline; /* If 1, automatically go offline when requests
cannot be sent */
int local_poll; /* Log2 of polling interval at our end */
int remote_poll; /* Log2 of server/peer's polling interval (recovered
@@ -1143,10 +1143,6 @@ transmit_timeout(void *arg)
break;
}
/* With auto_offline take the source offline on 2nd missed reply */
if (inst->auto_offline && inst->tx_count >= 2)
NCR_SetConnectivity(inst, SRC_OFFLINE);
if (inst->opmode == MD_OFFLINE) {
return;
}
@@ -1230,6 +1226,10 @@ transmit_timeout(void *arg)
SRC_UpdateReachability(inst->source, 0);
}
/* With auto_offline take the source offline if sending failed */
if (!sent && inst->auto_offline)
NCR_SetConnectivity(inst, SRC_OFFLINE);
switch (inst->opmode) {
case MD_BURST_WAS_ONLINE:
/* When not reachable, don't stop online burst until sending succeeds */
@@ -1239,6 +1239,8 @@ transmit_timeout(void *arg)
case MD_BURST_WAS_OFFLINE:
--inst->burst_total_samples_to_go;
break;
case MD_OFFLINE:
return;
default:
break;
}