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ntp: add function to update source NTP address

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This will allow a source to have its address changed due to NTS-KE
server negotiation, which allows the NTS-KE server to have a different
address than the NTP server.
This commit is contained in:
Miroslav Lichvar 2019-03-23 15:49:06 +01:00
parent 9468fd4aa6
commit e8062b7ff1
4 changed files with 24 additions and 6 deletions
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2
ntp_core.c
View file

@ -691,7 +691,7 @@ NCR_ResetPoll(NCR_Instance instance)
/* ================================================== */
void
NCR_ChangeRemoteAddress(NCR_Instance inst, NTP_Remote_Address *remote_addr)
NCR_ChangeRemoteAddress(NCR_Instance inst, NTP_Remote_Address *remote_addr, int ntp_only)
{
memset(&inst->report, 0, sizeof (inst->report));
NCR_ResetInstance(inst);

3
ntp_core.h
View file

@ -74,7 +74,8 @@ extern void NCR_ResetInstance(NCR_Instance inst);
extern void NCR_ResetPoll(NCR_Instance instance);
/* Change the remote address of an instance */
extern void NCR_ChangeRemoteAddress(NCR_Instance inst, NTP_Remote_Address *remote_addr);
extern void NCR_ChangeRemoteAddress(NCR_Instance inst, NTP_Remote_Address *remote_addr,
int ntp_only);
/* This routine is called when a new packet arrives off the network,
and it relates to a source we have an ongoing protocol exchange with */

21
ntp_sources.c
View file

@ -343,7 +343,8 @@ add_source(NTP_Remote_Address *remote_addr, char *name, NTP_Source_Type type, So
/* ================================================== */
static NSR_Status
replace_source(NTP_Remote_Address *old_addr, NTP_Remote_Address *new_addr)
change_source_address(NTP_Remote_Address *old_addr, NTP_Remote_Address *new_addr,
int replacement)
{
int slot1, slot2, found;
SourceRecord *record;
@ -361,7 +362,7 @@ replace_source(NTP_Remote_Address *old_addr, NTP_Remote_Address *new_addr)
return NSR_AlreadyInUse;
record = get_record(slot1);
NCR_ChangeRemoteAddress(record->data, new_addr);
NCR_ChangeRemoteAddress(record->data, new_addr, !replacement);
record->remote_addr = NCR_GetRemoteAddress(record->data);
if (!UTI_IsIPReal(&old_addr->ip_addr) && UTI_IsIPReal(&new_addr->ip_addr)) {
if (auto_start_sources)
@ -384,7 +385,8 @@ replace_source(NTP_Remote_Address *old_addr, NTP_Remote_Address *new_addr)
/* The hash table must be rebuilt for the changed address */
rehash_records();
LOG(severity, "Source %s replaced with %s (%s)", UTI_IPToString(&old_addr->ip_addr),
LOG(severity, "Source %s %s %s (%s)", UTI_IPToString(&old_addr->ip_addr),
replacement ? "replaced with" : "changed to",
UTI_IPToString(&new_addr->ip_addr), name ? name : "");
} else {
LOG(severity, "Source %s (%s) changed port to %d",
@ -404,7 +406,7 @@ replace_source_connectable(NTP_Remote_Address *old_addr, NTP_Remote_Address *new
return 0;
}
if (replace_source(old_addr, new_addr) == NSR_AlreadyInUse)
if (change_source_address(old_addr, new_addr, 1) == NSR_AlreadyInUse)
return 0;
return 1;
@ -864,6 +866,17 @@ NSR_RefreshAddresses(void)
/* ================================================== */
NSR_Status
NSR_UpdateSourceNtpAddress(NTP_Remote_Address *old_addr, NTP_Remote_Address *new_addr)
{
if (new_addr->ip_addr.family == IPADDR_UNSPEC)
return NSR_InvalidAF;
return change_source_address(old_addr, new_addr, 0);
}
/* ================================================== */
static void remove_pool_sources(int pool, int tentative, int unresolved)
{
SourceRecord *record;

4
ntp_sources.h
View file

@ -87,6 +87,10 @@ extern void NSR_HandleBadSource(IPAddr *address);
/* Procedure to resolve all names again */
extern void NSR_RefreshAddresses(void);
/* Procedure to update the address of a source */
extern NSR_Status NSR_UpdateSourceNtpAddress(NTP_Remote_Address *old_addr,
NTP_Remote_Address *new_addr);
/* Procedure to get local reference ID corresponding to a source */
extern uint32_t NSR_GetLocalRefid(IPAddr *address);