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chrony/ntp_sources.c
Miroslav Lichvar 308bcae257 ntp: limit number of pool sources 
A new option can be now used in the pool directive: maxsources sets the
maximum number of sources that can be used from the pool, the default
value is 4.

On start, when the pool name is resolved, chronyd will add up to 16
sources, one for each resolved address. When the number of sources from
which at least one valid reply was received reaches maxsources, the
other sources will be removed.
2014-11-26 17:56:36 +01:00

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/*
chronyd/chronyc - Programs for keeping computer clocks accurate.
**********************************************************************
* Copyright (C) Richard P. Curnow 1997-2003
* Copyright (C) Miroslav Lichvar 2011-2012, 2014
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
**********************************************************************
=======================================================================
Functions which manage the pool of NTP sources that we are currently
a client of or peering with.
*/
#include "config.h"
#include "sysincl.h"
#include "array.h"
#include "ntp_sources.h"
#include "ntp_core.h"
#include "util.h"
#include "logging.h"
#include "local.h"
#include "memory.h"
#include "nameserv_async.h"
#include "sched.h"
/* ================================================== */
/* Record type private to this file, used to store information about
particular sources */
typedef struct {
NTP_Remote_Address *remote_addr; /* The address of this source, non-NULL
means this slot in table is in use */
NCR_Instance data; /* Data for the protocol engine for this source */
int pool; /* Number of the pool from which was this source
added or INVALID_POOL */
int tentative; /* Flag indicating there was no valid response
yet and the source may be removed if other
sources from the pool respond first */
} SourceRecord;
/* Hash table of SourceRecord, the size should be a power of two */
static ARR_Instance records;
/* Number of sources in the hash table */
static int n_sources;
/* Flag indicating new sources will be started automatically when added */
static int auto_start_sources = 0;
/* Source with unknown address (which may be resolved later) */
struct UnresolvedSource {
char *name;
int port;
int replacement;
union {
struct {
NTP_Source_Type type;
SourceParameters params;
int pool;
int max_new_sources;
} new_source;
NTP_Remote_Address replace_source;
};
struct UnresolvedSource *next;
};
#define RESOLVE_INTERVAL_UNIT 7
#define MIN_RESOLVE_INTERVAL 2
#define MAX_RESOLVE_INTERVAL 9
static struct UnresolvedSource *unresolved_sources = NULL;
static int resolving_interval = 0;
static SCH_TimeoutID resolving_id;
static struct UnresolvedSource *resolving_source = NULL;
static NSR_SourceResolvingEndHandler resolving_end_handler = NULL;
#define MIN_POOL_RESOLVE_INTERVAL 5
#define MAX_POOL_SOURCES 16
#define INVALID_POOL (-1)
/* Pool of sources, the name is expected to resolve to multiple addresses
which change over time */
struct SourcePool {
char *name;
int port;
/* Number of sources added from this pool (ignoring tentative sources) */
int sources;
/* Maximum number of sources */
int max_sources;
};
/* Array of SourcePool */
static ARR_Instance pools;
/* ================================================== */
/* Forward prototypes */
static void resolve_sources(void *arg);
static void rehash_records(void);
static void
slew_sources(struct timeval *raw,
struct timeval *cooked,
double dfreq,
double doffset,
LCL_ChangeType change_type,
void *anything);
/* ================================================== */
/* Flag indicating whether module is initialised */
static int initialised = 0;
/* ================================================== */
static SourceRecord *
get_record(unsigned index)
{
return (SourceRecord *)ARR_GetElement(records, index);
}
/* ================================================== */
void
NSR_Initialise(void)
{
n_sources = 0;
initialised = 1;
records = ARR_CreateInstance(sizeof (SourceRecord));
rehash_records();
pools = ARR_CreateInstance(sizeof (struct SourcePool));
LCL_AddParameterChangeHandler(slew_sources, NULL);
}
/* ================================================== */
void
NSR_Finalise(void)
{
SourceRecord *record;
struct UnresolvedSource *us;
unsigned int i;
for (i = 0; i < ARR_GetSize(pools); i++)
Free(((struct SourcePool *)ARR_GetElement(pools, i))->name);
ARR_DestroyInstance(pools);
for (i = 0; i < ARR_GetSize(records); i++) {
record = get_record(i);
if (!record->remote_addr)
continue;
record->remote_addr = NULL;
NCR_DestroyInstance(record->data);
}
ARR_DestroyInstance(records);
while (unresolved_sources) {
us = unresolved_sources;
unresolved_sources = us->next;
Free(us->name);
Free(us);
}
initialised = 0;
}
/* ================================================== */
/* Return slot number and whether the IP address was matched or not.
found = 0 => Neither IP nor port matched, empty slot returned
found = 1 => Only IP matched, port doesn't match
found = 2 => Both IP and port matched.
It is assumed that there can only ever be one record for a
particular IP address. (If a different port comes up, it probably
means someone is running ntpdate -d or something). Thus, if we
match the IP address we stop the search regardless of whether the
port number matches.
*/
static void
find_slot(NTP_Remote_Address *remote_addr, int *slot, int *found)
{
SourceRecord *record;
uint32_t hash;
unsigned int i, size;
unsigned short port;
uint8_t *ip6;
size = ARR_GetSize(records);
switch (remote_addr->ip_addr.family) {
case IPADDR_INET6:
ip6 = remote_addr->ip_addr.addr.in6;
hash = (ip6[0] ^ ip6[4] ^ ip6[8] ^ ip6[12]) |
(ip6[1] ^ ip6[5] ^ ip6[9] ^ ip6[13]) << 8 |
(ip6[2] ^ ip6[6] ^ ip6[10] ^ ip6[14]) << 16 |
(ip6[3] ^ ip6[7] ^ ip6[11] ^ ip6[15]) << 24;
break;
case IPADDR_INET4:
hash = remote_addr->ip_addr.addr.in4;
break;
default:
*found = *slot = 0;
return;
}
port = remote_addr->port;
for (i = 0; i < size / 2; i++) {
/* Use quadratic probing */
*slot = (hash + (i + i * i) / 2) % size;
record = get_record(*slot);
if (!record->remote_addr)
break;
if (!UTI_CompareIPs(&record->remote_addr->ip_addr,
&remote_addr->ip_addr, NULL)) {
*found = record->remote_addr->port == port ? 2 : 1;
return;
}
}
*found = 0;
}
/* ================================================== */
/* Check if hash table of given size is sufficient to contain sources */
static int
check_hashtable_size(unsigned int sources, unsigned int size)
{
return sources * 2 + 1 < size;
}
/* ================================================== */
static void
rehash_records(void)
{
SourceRecord *temp_records;
unsigned int i, old_size, new_size;
int slot, found;
old_size = ARR_GetSize(records);
temp_records = MallocArray(SourceRecord, old_size);
memcpy(temp_records, ARR_GetElements(records), old_size * sizeof (SourceRecord));
/* The size of the hash table is always a power of two */
for (new_size = 4; !check_hashtable_size(n_sources, new_size); new_size *= 2)
;
ARR_SetSize(records, new_size);
for (i = 0; i < new_size; i++)
get_record(i)->remote_addr = NULL;
for (i = 0; i < old_size; i++) {
if (!temp_records[i].remote_addr)
continue;
find_slot(temp_records[i].remote_addr, &slot, &found);
assert(!found);
*get_record(slot) = temp_records[i];
}
Free(temp_records);
}
/* ================================================== */
/* Procedure to add a new source */
static NSR_Status
add_source(NTP_Remote_Address *remote_addr, NTP_Source_Type type, SourceParameters *params, int pool)
{
SourceRecord *record;
int slot, found;
assert(initialised);
/* Find empty bin & check that we don't have the address already */
find_slot(remote_addr, &slot, &found);
if (found) {
return NSR_AlreadyInUse;
} else {
if (remote_addr->ip_addr.family != IPADDR_INET4 &&
remote_addr->ip_addr.family != IPADDR_INET6) {
return NSR_InvalidAF;
} else {
n_sources++;
if (!check_hashtable_size(n_sources, ARR_GetSize(records))) {
rehash_records();
find_slot(remote_addr, &slot, &found);
}
assert(!found);
record = get_record(slot);
record->data = NCR_GetInstance(remote_addr, type, params);
record->remote_addr = NCR_GetRemoteAddress(record->data);
record->pool = pool;
record->tentative = pool != INVALID_POOL ? 1 : 0;
if (auto_start_sources)
NCR_StartInstance(record->data);
return NSR_Success;
}
}
}
/* ================================================== */
static NSR_Status
replace_source(NTP_Remote_Address *old_addr, NTP_Remote_Address *new_addr)
{
int slot1, slot2, found;
SourceRecord *record;
find_slot(old_addr, &slot1, &found);
if (!found)
return NSR_NoSuchSource;
find_slot(new_addr, &slot2, &found);
if (found)
return NSR_AlreadyInUse;
record = get_record(slot1);
NCR_ChangeRemoteAddress(record->data, new_addr);
record->remote_addr = NCR_GetRemoteAddress(record->data);
/* The hash table must be rebuilt for the new address */
rehash_records();
LOG(LOGS_INFO, LOGF_NtpSources, "Source %s replaced with %s",
UTI_IPToString(&old_addr->ip_addr),
UTI_IPToString(&new_addr->ip_addr));
return NSR_Success;
}
/* ================================================== */
static void
process_resolved_name(struct UnresolvedSource *us, IPAddr *ip_addrs, int n_addrs)
{
NTP_Remote_Address address;
int i, added;
for (i = added = 0; i < n_addrs; i++) {
DEBUG_LOG(LOGF_NtpSources, "%s resolved to %s", us->name, UTI_IPToString(&ip_addrs[i]));
address.ip_addr = ip_addrs[i];
address.port = us->port;
if (us->replacement) {
if (replace_source(&us->replace_source, &address) != NSR_AlreadyInUse)
break;
} else {
if (add_source(&address, us->new_source.type, &us->new_source.params,
us->new_source.pool) == NSR_Success)
added++;
if (added >= us->new_source.max_new_sources)
break;
}
}
}
/* ================================================== */
static void
name_resolve_handler(DNS_Status status, int n_addrs, IPAddr *ip_addrs, void *anything)
{
struct UnresolvedSource *us, **i, *next;
us = (struct UnresolvedSource *)anything;
assert(us == resolving_source);
switch (status) {
case DNS_TryAgain:
break;
case DNS_Success:
process_resolved_name(us, ip_addrs, n_addrs);
break;
case DNS_Failure:
LOG(LOGS_WARN, LOGF_NtpSources, "Invalid host %s", us->name);
break;
default:
assert(0);
}
next = us->next;
/* Remove the source from the list on success or failure, replacements
are removed on any status */
if (us->replacement || status != DNS_TryAgain) {
for (i = &unresolved_sources; *i; i = &(*i)->next) {
if (*i == us) {
*i = us->next;
Free(us->name);
Free(us);
break;
}
}
}
resolving_source = next;
if (next) {
/* Continue with the next source in the list */
DEBUG_LOG(LOGF_NtpSources, "resolving %s", next->name);
DNS_Name2IPAddressAsync(next->name, name_resolve_handler, next);
} else {
/* This was the last source in the list. If some sources couldn't
be resolved, try again in exponentially increasing interval. */
if (unresolved_sources) {
if (resolving_interval < MIN_RESOLVE_INTERVAL)
resolving_interval = MIN_RESOLVE_INTERVAL;
else if (resolving_interval < MAX_RESOLVE_INTERVAL)
resolving_interval++;
resolving_id = SCH_AddTimeoutByDelay(RESOLVE_INTERVAL_UNIT *
(1 << resolving_interval), resolve_sources, NULL);
} else {
resolving_interval = 0;
}
/* This round of resolving is done */
if (resolving_end_handler)
(resolving_end_handler)();
}
}
/* ================================================== */
static void
resolve_sources(void *arg)
{
struct UnresolvedSource *us;
assert(!resolving_source);
DNS_Reload();
/* Start with the first source in the list, name_resolve_handler
will iterate over the rest */
us = unresolved_sources;
resolving_source = us;
DEBUG_LOG(LOGF_NtpSources, "resolving %s", us->name);
DNS_Name2IPAddressAsync(us->name, name_resolve_handler, us);
}
/* ================================================== */
static void
append_unresolved_source(struct UnresolvedSource *us)
{
struct UnresolvedSource **i;
for (i = &unresolved_sources; *i; i = &(*i)->next)
;
*i = us;
us->next = NULL;
}
/* ================================================== */
NSR_Status
NSR_AddSource(NTP_Remote_Address *remote_addr, NTP_Source_Type type, SourceParameters *params)
{
return add_source(remote_addr, type, params, INVALID_POOL);
}
/* ================================================== */
void
NSR_AddSourceByName(char *name, int port, int pool, NTP_Source_Type type, SourceParameters *params)
{
struct UnresolvedSource *us;
struct SourcePool *sp;
us = MallocNew(struct UnresolvedSource);
us->name = Strdup(name);
us->port = port;
us->replacement = 0;
us->new_source.type = type;
us->new_source.params = *params;
if (!pool) {
us->new_source.pool = INVALID_POOL;
us->new_source.max_new_sources = 1;
} else {
sp = (struct SourcePool *)ARR_GetNewElement(pools);
sp->name = Strdup(name);
sp->port = port;
sp->sources = 0;
sp->max_sources = params->max_sources;
us->new_source.pool = ARR_GetSize(pools) - 1;
us->new_source.max_new_sources = MAX_POOL_SOURCES;
}
append_unresolved_source(us);
}
/* ================================================== */
void
NSR_SetSourceResolvingEndHandler(NSR_SourceResolvingEndHandler handler)
{
resolving_end_handler = handler;
}
/* ================================================== */
void
NSR_ResolveSources(void)
{
/* Try to resolve unresolved sources now */
if (unresolved_sources) {
/* Make sure no resolving is currently running */
if (!resolving_source) {
if (resolving_interval) {
SCH_RemoveTimeout(resolving_id);
resolving_interval--;
}
resolve_sources(NULL);
}
} else {
/* No unresolved sources, we are done */
if (resolving_end_handler)
(resolving_end_handler)();
}
}
/* ================================================== */
void NSR_StartSources(void)
{
unsigned int i;
for (i = 0; i < ARR_GetSize(records); i++) {
if (!get_record(i)->remote_addr)
continue;
NCR_StartInstance(get_record(i)->data);
}
}
/* ================================================== */
void NSR_AutoStartSources(void)
{
auto_start_sources = 1;
}
/* ================================================== */
static void
clean_source_record(SourceRecord *record)
{
assert(record->remote_addr);
record->remote_addr = NULL;
NCR_DestroyInstance(record->data);
n_sources--;
}
/* ================================================== */
/* Procedure to remove a source. We don't bother whether the port
address is matched - we're only interested in removing a record for
the right IP address. Thus the caller can specify the port number
as zero if it wishes. */
NSR_Status
NSR_RemoveSource(NTP_Remote_Address *remote_addr)
{
int slot, found;
assert(initialised);
find_slot(remote_addr, &slot, &found);
if (!found) {
return NSR_NoSuchSource;
}
clean_source_record(get_record(slot));
/* Rehash the table to make sure there are no broken probe sequences.
This is costly, but it's not expected to happen frequently. */
rehash_records();
return NSR_Success;
}
/* ================================================== */
void
NSR_RemoveAllSources(void)
{
SourceRecord *record;
unsigned int i;
for (i = 0; i < ARR_GetSize(records); i++) {
record = get_record(i);
if (!record->remote_addr)
continue;
clean_source_record(record);
}
rehash_records();
}
/* ================================================== */
static void
resolve_pool_replacement(struct SourcePool *sp, NTP_Remote_Address *addr)
{
struct UnresolvedSource *us;
us = MallocNew(struct UnresolvedSource);
us->name = Strdup(sp->name);
us->port = sp->port;
us->replacement = 1;
us->replace_source = *addr;
append_unresolved_source(us);
NSR_ResolveSources();
}
/* ================================================== */
void
NSR_HandleBadSource(IPAddr *address)
{
static struct timeval last_replacement;
struct timeval now;
NTP_Remote_Address remote_addr;
struct SourcePool *pool;
int pool_index, slot, found;
double diff;
remote_addr.ip_addr = *address;
remote_addr.port = 0;
/* Only sources from a pool can be replaced */
find_slot(&remote_addr, &slot, &found);
if (!found || (pool_index = get_record(slot)->pool) == INVALID_POOL)
return;
pool = (struct SourcePool *)ARR_GetElement(pools, pool_index);
/* Don't resolve the pool name too frequently */
SCH_GetLastEventTime(NULL, NULL, &now);
UTI_DiffTimevalsToDouble(&diff, &now, &last_replacement);
if (fabs(diff) < RESOLVE_INTERVAL_UNIT * (1 << MIN_POOL_RESOLVE_INTERVAL)) {
DEBUG_LOG(LOGF_NtpSources, "replacement postponed");
return;
}
last_replacement = now;
DEBUG_LOG(LOGF_NtpSources, "pool replacement for %s", UTI_IPToString(address));
resolve_pool_replacement(pool, &remote_addr);
}
/* ================================================== */
static void remove_tentative_pool_sources(int pool)
{
SourceRecord *record;
unsigned int i, removed;
for (i = removed = 0; i < ARR_GetSize(records); i++) {
record = get_record(i);
if (!record->remote_addr || record->pool != pool || !record->tentative)
continue;
DEBUG_LOG(LOGF_NtpSources, "removing tentative source %s",
UTI_IPToString(&record->remote_addr->ip_addr));
clean_source_record(record);
removed++;
}
if (removed)
rehash_records();
}
/* This routine is called by ntp_io when a new packet arrives off the network,
possibly with an authentication tail */
void
NSR_ProcessReceive(NTP_Packet *message, struct timeval *now, double now_err, NTP_Remote_Address *remote_addr, NTP_Local_Address *local_addr, int length)
{
SourceRecord *record;
struct SourcePool *pool;
int slot, found;
assert(initialised);
find_slot(remote_addr, &slot, &found);
if (found == 2) { /* Must match IP address AND port number */
record = get_record(slot);
if (!NCR_ProcessKnown(message, now, now_err, record->data, local_addr, length))
return;
if (record->tentative) {
/* First reply from a pool source */
record->tentative = 0;
assert(record->pool != INVALID_POOL);
pool = (struct SourcePool *)ARR_GetElement(pools, record->pool);
pool->sources++;
DEBUG_LOG(LOGF_NtpSources, "pool %s has %d confirmed sources",
pool->name, pool->sources);
/* If the number of sources reached the configured maximum, remove
the tentative sources added from this pool */
if (pool->sources >= pool->max_sources)
remove_tentative_pool_sources(record->pool);
}
} else {
NCR_ProcessUnknown(message, now, now_err, remote_addr, local_addr, length);
}
}
/* ================================================== */
static void
slew_sources(struct timeval *raw,
struct timeval *cooked,
double dfreq,
double doffset,
LCL_ChangeType change_type,
void *anything)
{
SourceRecord *record;
unsigned int i;
for (i = 0; i < ARR_GetSize(records); i++) {
record = get_record(i);
if (record->remote_addr) {
if (change_type == LCL_ChangeUnknownStep) {
NCR_ResetInstance(record->data);
} else {
NCR_SlewTimes(record->data, cooked, dfreq, doffset);
}
}
}
}
/* ================================================== */
int
NSR_TakeSourcesOnline(IPAddr *mask, IPAddr *address)
{
SourceRecord *record;
unsigned int i;
int any;
NSR_ResolveSources();
any = 0;
for (i = 0; i < ARR_GetSize(records); i++) {
record = get_record(i);
if (record->remote_addr) {
if (address->family == IPADDR_UNSPEC ||
!UTI_CompareIPs(&record->remote_addr->ip_addr, address, mask)) {
any = 1;
NCR_TakeSourceOnline(record->data);
}
}
}
if (address->family == IPADDR_UNSPEC) {
struct UnresolvedSource *us;
for (us = unresolved_sources; us; us = us->next) {
if (us->replacement)
continue;
any = 1;
us->new_source.params.online = 1;
}
}
return any;
}
/* ================================================== */
int
NSR_TakeSourcesOffline(IPAddr *mask, IPAddr *address)
{
SourceRecord *record, *syncpeer;
unsigned int i, any;
any = 0;
syncpeer = NULL;
for (i = 0; i < ARR_GetSize(records); i++) {
record = get_record(i);
if (record->remote_addr) {
if (address->family == IPADDR_UNSPEC ||
!UTI_CompareIPs(&record->remote_addr->ip_addr, address, mask)) {
any = 1;
if (NCR_IsSyncPeer(record->data)) {
syncpeer = record;
continue;
}
NCR_TakeSourceOffline(record->data);
}
}
}
/* Take sync peer offline as last to avoid reference switching */
if (syncpeer) {
NCR_TakeSourceOffline(syncpeer->data);
}
if (address->family == IPADDR_UNSPEC) {
struct UnresolvedSource *us;
for (us = unresolved_sources; us; us = us->next) {
if (us->replacement)
continue;
any = 1;
us->new_source.params.online = 0;
}
}
return any;
}
/* ================================================== */
int
NSR_ModifyMinpoll(IPAddr *address, int new_minpoll)
{
int slot, found;
NTP_Remote_Address addr;
addr.ip_addr = *address;
addr.port = 0;
find_slot(&addr, &slot, &found);
if (found == 0) {
return 0;
} else {
NCR_ModifyMinpoll(get_record(slot)->data, new_minpoll);
return 1;
}
}
/* ================================================== */
int
NSR_ModifyMaxpoll(IPAddr *address, int new_maxpoll)
{
int slot, found;
NTP_Remote_Address addr;
addr.ip_addr = *address;
addr.port = 0;
find_slot(&addr, &slot, &found);
if (found == 0) {
return 0;
} else {
NCR_ModifyMaxpoll(get_record(slot)->data, new_maxpoll);
return 1;
}
}
/* ================================================== */
int
NSR_ModifyMaxdelay(IPAddr *address, double new_max_delay)
{
int slot, found;
NTP_Remote_Address addr;
addr.ip_addr = *address;
addr.port = 0;
find_slot(&addr, &slot, &found);
if (found == 0) {
return 0;
} else {
NCR_ModifyMaxdelay(get_record(slot)->data, new_max_delay);
return 1;
}
}
/* ================================================== */
int
NSR_ModifyMaxdelayratio(IPAddr *address, double new_max_delay_ratio)
{
int slot, found;
NTP_Remote_Address addr;
addr.ip_addr = *address;
addr.port = 0;
find_slot(&addr, &slot, &found);
if (found == 0) {
return 0;
} else {
NCR_ModifyMaxdelayratio(get_record(slot)->data, new_max_delay_ratio);
return 1;
}
}
/* ================================================== */
int
NSR_ModifyMaxdelaydevratio(IPAddr *address, double new_max_delay_dev_ratio)
{
int slot, found;
NTP_Remote_Address addr;
addr.ip_addr = *address;
addr.port = 0;
find_slot(&addr, &slot, &found);
if (found == 0) {
return 0;
} else {
NCR_ModifyMaxdelaydevratio(get_record(slot)->data, new_max_delay_dev_ratio);
return 1;
}
}
/* ================================================== */
int
NSR_ModifyMinstratum(IPAddr *address, int new_min_stratum)
{
int slot, found;
NTP_Remote_Address addr;
addr.ip_addr = *address;
addr.port = 0;
find_slot(&addr, &slot, &found);
if (found == 0) {
return 0;
} else {
NCR_ModifyMinstratum(get_record(slot)->data, new_min_stratum);
return 1;
}
}
/* ================================================== */
int
NSR_ModifyPolltarget(IPAddr *address, int new_poll_target)
{
int slot, found;
NTP_Remote_Address addr;
addr.ip_addr = *address;
addr.port = 0;
find_slot(&addr, &slot, &found);
if (found == 0) {
return 0;
} else {
NCR_ModifyPolltarget(get_record(slot)->data, new_poll_target);
return 1;
}
}
/* ================================================== */
int
NSR_InitiateSampleBurst(int n_good_samples, int n_total_samples,
IPAddr *mask, IPAddr *address)
{
SourceRecord *record;
unsigned int i;
int any;
any = 0;
for (i = 0; i < ARR_GetSize(records); i++) {
record = get_record(i);
if (record->remote_addr) {
if (address->family == IPADDR_UNSPEC ||
!UTI_CompareIPs(&record->remote_addr->ip_addr, address, mask)) {
any = 1;
NCR_InitiateSampleBurst(record->data, n_good_samples, n_total_samples);
}
}
}
return any;
}
/* ================================================== */
/* The ip address is assumed to be completed on input, that is how we
identify the source record. */
void
NSR_ReportSource(RPT_SourceReport *report, struct timeval *now)
{
NTP_Remote_Address rem_addr;
int slot, found;
rem_addr.ip_addr = report->ip_addr;
rem_addr.port = 0;
find_slot(&rem_addr, &slot, &found);
if (found) {
NCR_ReportSource(get_record(slot)->data, report, now);
} else {
report->poll = 0;
report->latest_meas_ago = 0;
}
}
/* ================================================== */
void
NSR_GetActivityReport(RPT_ActivityReport *report)
{
SourceRecord *record;
unsigned int i;
struct UnresolvedSource *us;
report->online = 0;
report->offline = 0;
report->burst_online = 0;
report->burst_offline = 0;
for (i = 0; i < ARR_GetSize(records); i++) {
record = get_record(i);
if (record->remote_addr) {
NCR_IncrementActivityCounters(record->data, &report->online, &report->offline,
&report->burst_online, &report->burst_offline);
}
}
report->unresolved = 0;
for (us = unresolved_sources; us; us = us->next) {
report->unresolved++;
}
}
/* ================================================== */
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