/**
* Connection notifies us about failure or success of a transmission
* request. Either pass it on to our user or, if possible, retry.
*
* @param cls our "struct GNUNET_CLIENT_TransmissionHandle"
* @param size number of bytes available for transmission
* @param buf where to write them
* @return number of bytes written to buf
*/
static size_t
client_notify (void *cls, size_t size, void *buf)
{
struct GNUNET_CLIENT_TransmitHandle *th = cls;
struct GNUNET_CLIENT_Connection *client = th->client;
size_t ret;
struct GNUNET_TIME_Relative delay;
th->th = NULL;
client->th = NULL;
if (NULL == buf)
{
delay = GNUNET_TIME_absolute_get_remaining (th->timeout);
delay.rel_value /= 2;
if ((GNUNET_YES != th->auto_retry) || (0 == --th->attempts_left) ||
(delay.rel_value < 1))
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Transmission failed %u times, giving up.\n",
MAX_ATTEMPTS - th->attempts_left);
GNUNET_break (0 == th->notify (th->notify_cls, 0, NULL));
GNUNET_free (th);
return 0;
}
/* auto-retry */
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Failed to connect to `%s', automatically trying again.\n",
client->service_name);
if (GNUNET_YES == client->in_receive)
{
GNUNET_CONNECTION_receive_cancel (client->connection);
client->in_receive = GNUNET_NO;
}
GNUNET_CONNECTION_destroy (client->connection);
client->connection = NULL;
delay = GNUNET_TIME_relative_min (delay, client->back_off);
client->back_off =
GNUNET_TIME_relative_min (GNUNET_TIME_relative_multiply
(client->back_off, 2),
GNUNET_TIME_UNIT_SECONDS);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Transmission failed %u times, trying again in %s.\n",
MAX_ATTEMPTS - th->attempts_left,
GNUNET_STRINGS_relative_time_to_string (delay, GNUNET_YES));
client->th = th;
th->reconnect_task =
GNUNET_SCHEDULER_add_delayed (delay, &client_delayed_retry, th);
return 0;
}
GNUNET_assert (size >= th->size);
ret = th->notify (th->notify_cls, size, buf);
GNUNET_free (th);
return ret;
}
/**
* Function called for all addresses and peers to find the minimum and
* maximum (averaged) values for a given quality property. Given
* those, we can then calculate the normalized score.
*
* @param cls the `struct PropertyRange`
* @param h which peer are we looking at (ignored)
* @param k the address for that peer
* @return #GNUNET_OK (continue to iterate)
*/
static int
find_min_max_it (void *cls,
const struct GNUNET_PeerIdentity *h,
void *k)
{
struct PropertyRange *pr = cls;
const struct ATS_Address *a = k;
pr->max.utilization_out = GNUNET_MAX (pr->max.utilization_out,
a->properties.utilization_out);
pr->max.utilization_in = GNUNET_MAX (pr->max.utilization_in,
a->properties.utilization_in);
pr->max.distance = GNUNET_MAX (pr->max.distance,
a->properties.distance);
pr->max.delay = GNUNET_TIME_relative_max (pr->max.delay,
a->properties.delay);
pr->min.utilization_out = GNUNET_MIN (pr->min.utilization_out,
a->properties.utilization_out);
pr->min.utilization_in = GNUNET_MIN (pr->min.utilization_in,
a->properties.utilization_in);
pr->min.distance = GNUNET_MIN (pr->min.distance,
a->properties.distance);
pr->min.delay = GNUNET_TIME_relative_min (pr->min.delay,
a->properties.delay);
return GNUNET_OK;
}
/**
* Find a peer that would be reasonable for advertising.
*
* @param cls closure
* @param pid identity of a peer
* @param value 'struct Peer*' for the peer we are considering
* @return GNUNET_YES (continue iteration)
*/
static int
find_advertisable_hello (void *cls, const struct GNUNET_HashCode * pid, void *value)
{
struct FindAdvHelloContext *fah = cls;
struct Peer *pos = value;
struct GNUNET_TIME_Relative rst_time;
size_t hs;
if (pos == fah->peer)
return GNUNET_YES;
if (pos->hello == NULL)
return GNUNET_YES;
rst_time = GNUNET_TIME_absolute_get_remaining (pos->filter_expiration);
if (0 == rst_time.rel_value)
{
/* time to discard... */
GNUNET_CONTAINER_bloomfilter_free (pos->filter);
setup_filter (pos);
}
fah->next_adv = GNUNET_TIME_relative_min (rst_time, fah->next_adv);
hs = GNUNET_HELLO_size (pos->hello);
if (hs > fah->max_size)
return GNUNET_YES;
if (GNUNET_NO ==
GNUNET_CONTAINER_bloomfilter_test (pos->filter,
&fah->peer->pid.hashPubKey))
fah->result = pos;
return GNUNET_YES;
}
/**
* This task is run if we should re-try connection to the
* service after a while.
*
* @param cls our "struct GNUNET_CLIENT_TransmitHandle" of the request
* @param tc unused
*/
static void
client_delayed_retry (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_CLIENT_TransmitHandle *th = cls;
struct GNUNET_TIME_Relative delay;
th->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
th->client->connection =
do_connect (th->client->service_name, th->client->cfg, th->client->attempts++);
th->client->first_message = GNUNET_YES;
if (NULL == th->client->connection)
{
/* could happen if we're out of sockets */
delay =
GNUNET_TIME_relative_min (GNUNET_TIME_absolute_get_remaining
(th->timeout), th->client->back_off);
th->client->back_off =
GNUNET_TIME_relative_min (GNUNET_TIME_relative_multiply
(th->client->back_off, 2),
GNUNET_TIME_UNIT_SECONDS);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Transmission failed %u times, trying again in %s.\n",
MAX_ATTEMPTS - th->attempts_left,
GNUNET_STRINGS_relative_time_to_string (delay, GNUNET_YES));
th->reconnect_task =
GNUNET_SCHEDULER_add_delayed (delay, &client_delayed_retry, th);
return;
}
th->th =
GNUNET_CONNECTION_notify_transmit_ready (th->client->connection, th->size,
GNUNET_TIME_absolute_get_remaining
(th->timeout), &client_notify,
th);
if (NULL == th->th)
{
GNUNET_break (0);
th->client->th = NULL;
th->notify (th->notify_cls, 0, NULL);
GNUNET_free (th);
return;
}
}
/**
* Calculate when to run the next PUT operation and schedule it.
*
* @param po put operator to schedule
*/
static void
schedule_next_put (struct PutOperator *po)
{
struct GNUNET_TIME_Relative delay;
if (po->zero_anonymity_count_estimate > 0)
{
delay =
GNUNET_TIME_relative_divide (GNUNET_DHT_DEFAULT_REPUBLISH_FREQUENCY,
po->zero_anonymity_count_estimate);
delay = GNUNET_TIME_relative_min (delay, MAX_DHT_PUT_FREQ);
}
else
{
/* if we have NO zero-anonymity content yet, wait 5 minutes for some to
* (hopefully) appear */
delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5);
}
po->dht_task =
GNUNET_SCHEDULER_add_delayed (delay, &gather_dht_put_blocks, po);
}
/**
* Disconnect from the service (communication error) and reconnect later.
*
* @param vh handle to reconnect.
*/
static void
reconnect (struct GNUNET_VPN_Handle *vh)
{
struct GNUNET_VPN_RedirectionRequest *rr;
if (NULL != vh->th)
{
GNUNET_CLIENT_notify_transmit_ready_cancel (vh->th);
vh->th = NULL;
}
GNUNET_CLIENT_disconnect (vh->client);
vh->client = NULL;
vh->request_id_gen = 0;
for (rr = vh->rr_head; NULL != rr; rr = rr->next)
rr->request_id = 0;
vh->backoff = GNUNET_TIME_relative_max (GNUNET_TIME_UNIT_MILLISECONDS,
GNUNET_TIME_relative_min (GNUNET_TIME_relative_multiply (vh->backoff, 2),
GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30)));
vh->rt = GNUNET_SCHEDULER_add_delayed (vh->backoff,
&connect_task,
vh);
}
void
GNUNET_ATS_TEST_traffic_handle_pong (struct BenchmarkPartner *p)
{
struct GNUNET_TIME_Relative left;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Master [%u]: Received PONG from [%u], next message\n", p->me->no,
p->dest->no);
p->messages_received++;
p->bytes_received += TEST_MESSAGE_SIZE;
p->me->total_messages_received++;
p->me->total_bytes_received += TEST_MESSAGE_SIZE;
p->total_app_rtt += GNUNET_TIME_absolute_get_difference(p->last_message_sent,
GNUNET_TIME_absolute_get()).rel_value_us;
/* Schedule next send event */
if (NULL == p->tg)
return;
left = GNUNET_TIME_absolute_get_remaining(p->tg->next_ping_transmission);
if (UINT32_MAX == p->tg->base_rate)
{
p->tg->send_task = GNUNET_SCHEDULER_add_now (&comm_schedule_send, p);
}
else if (0 == left.rel_value_us)
{
p->tg->send_task = GNUNET_SCHEDULER_add_now (&comm_schedule_send, p);
}
else
{
/* Enforce minimum transmission rate 1 msg / sec */
if (GNUNET_TIME_UNIT_SECONDS.rel_value_us == (left = GNUNET_TIME_relative_min (left, GNUNET_TIME_UNIT_SECONDS)).rel_value_us)
GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
"Enforcing minimum send rate between master [%u] and slave [%u]\n",
p->me->no, p->dest->no);
p->tg->send_task = GNUNET_SCHEDULER_add_delayed (left,
&comm_schedule_send, p);
}
}
/**
* Try to connect to the specified peer.
*
* @param pos peer to connect to
*/
static void
attempt_connect (struct Peer *pos)
{
struct GNUNET_TIME_Relative rem;
if ((connection_count >= target_connection_count) &&
(friend_count >= minimum_friend_count))
return;
if (GNUNET_YES == pos->is_connected)
return;
if (GNUNET_OK != is_connection_allowed (pos))
return;
if (GNUNET_TIME_absolute_get_remaining (pos->greylisted_until).rel_value > 0)
return;
if (GNUNET_YES == pos->is_friend)
rem = GREYLIST_AFTER_ATTEMPT_FRIEND;
else
rem = GREYLIST_AFTER_ATTEMPT;
rem = GNUNET_TIME_relative_multiply (rem, connection_count);
rem = GNUNET_TIME_relative_divide (rem, target_connection_count);
if (pos->connect_attempts > 30)
pos->connect_attempts = 30;
rem = GNUNET_TIME_relative_multiply (rem, 1 << (++pos->connect_attempts));
rem = GNUNET_TIME_relative_max (rem, GREYLIST_AFTER_ATTEMPT_MIN);
rem = GNUNET_TIME_relative_min (rem, GREYLIST_AFTER_ATTEMPT_MAX);
pos->greylisted_until = GNUNET_TIME_relative_to_absolute (rem);
if (pos->greylist_clean_task != GNUNET_SCHEDULER_NO_TASK)
GNUNET_SCHEDULER_cancel (pos->greylist_clean_task);
pos->greylist_clean_task =
GNUNET_SCHEDULER_add_delayed (rem, &remove_from_greylist, pos);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Asking to connect to `%s'\n",
GNUNET_i2s (&pos->pid));
GNUNET_STATISTICS_update (stats,
gettext_noop
("# connect requests issued to transport"), 1,
GNUNET_NO);
GNUNET_TRANSPORT_try_connect (transport, &pos->pid, NULL, NULL); /*FIXME TRY_CONNECT change */
}
/**
* Try to establish a connection given the specified address.
* This function is called by the resolver once we have a DNS reply.
*
* @param cls our "struct GNUNET_CONNECTION_Handle *"
* @param addr address to try, NULL for "last call"
* @param addrlen length of addr
*/
static void
try_connect_using_address (void *cls, const struct sockaddr *addr,
socklen_t addrlen)
{
struct GNUNET_CONNECTION_Handle *connection = cls;
struct AddressProbe *ap;
struct GNUNET_TIME_Relative delay;
if (NULL == addr)
{
connection->dns_active = NULL;
if ((NULL == connection->ap_head) && (NULL == connection->sock))
connect_fail_continuation (connection);
return;
}
if (NULL != connection->sock)
return; /* already connected */
GNUNET_assert (NULL == connection->addr);
/* try to connect */
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Trying to connect using address `%s:%u/%s:%u'\n", connection->hostname, connection->port,
GNUNET_a2s (addr, addrlen), connection->port);
ap = GNUNET_malloc (sizeof (struct AddressProbe) + addrlen);
ap->addr = (const struct sockaddr *) &ap[1];
memcpy (&ap[1], addr, addrlen);
ap->addrlen = addrlen;
ap->connection = connection;
switch (ap->addr->sa_family)
{
case AF_INET:
((struct sockaddr_in *) ap->addr)->sin_port = htons (connection->port);
break;
case AF_INET6:
((struct sockaddr_in6 *) ap->addr)->sin6_port = htons (connection->port);
break;
default:
GNUNET_break (0);
GNUNET_free (ap);
return; /* not supported by us */
}
ap->sock = GNUNET_NETWORK_socket_create (ap->addr->sa_family, SOCK_STREAM, 0);
if (NULL == ap->sock)
{
GNUNET_free (ap);
return; /* not supported by OS */
}
LOG (GNUNET_ERROR_TYPE_INFO, _("Trying to connect to `%s' (%p)\n"),
GNUNET_a2s (ap->addr, ap->addrlen), connection);
if ((GNUNET_OK !=
GNUNET_NETWORK_socket_connect (ap->sock, ap->addr, ap->addrlen)) &&
(EINPROGRESS != errno))
{
/* maybe refused / unsupported address, try next */
LOG_STRERROR (GNUNET_ERROR_TYPE_INFO, "connect");
#if 0
LOG (GNUNET_ERROR_TYPE_INFO, _("Failed to connect to `%s' (%p)\n"),
GNUNET_a2s (ap->addr, ap->addrlen), connection);
#endif
GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (ap->sock));
GNUNET_free (ap);
return;
}
GNUNET_CONTAINER_DLL_insert (connection->ap_head, connection->ap_tail, ap);
delay = GNUNET_CONNECTION_CONNECT_RETRY_TIMEOUT;
if (NULL != connection->nth.notify_ready)
delay =
GNUNET_TIME_relative_min (delay,
GNUNET_TIME_absolute_get_remaining (connection->
nth.transmit_timeout));
if (NULL != connection->receiver)
delay =
GNUNET_TIME_relative_min (delay,
GNUNET_TIME_absolute_get_remaining
(connection->receive_timeout));
ap->task =
GNUNET_SCHEDULER_add_write_net (delay, ap->sock,
&connect_probe_continuation, ap);
}
int
main (int argc, char *argv[])
{
struct GNUNET_TIME_Absolute now;
struct GNUNET_TIME_AbsoluteNBO nown;
struct GNUNET_TIME_Absolute future;
struct GNUNET_TIME_Absolute past;
struct GNUNET_TIME_Absolute last;
struct GNUNET_TIME_Absolute forever;
struct GNUNET_TIME_Absolute zero;
struct GNUNET_TIME_Relative rel;
struct GNUNET_TIME_Relative relForever;
struct GNUNET_TIME_Relative relUnit;
struct GNUNET_TIME_RelativeNBO reln;
unsigned int i;
GNUNET_log_setup ("test-time", "WARNING", NULL);
forever = GNUNET_TIME_UNIT_FOREVER_ABS;
relForever = GNUNET_TIME_UNIT_FOREVER_REL;
relUnit = GNUNET_TIME_UNIT_MILLISECONDS;
zero.abs_value_us = 0;
last = now = GNUNET_TIME_absolute_get ();
while (now.abs_value_us == last.abs_value_us)
now = GNUNET_TIME_absolute_get ();
GNUNET_assert (now.abs_value_us > last.abs_value_us);
/* test overflow checking in multiply */
rel = GNUNET_TIME_UNIT_MILLISECONDS;
GNUNET_log_skip (1, GNUNET_NO);
for (i = 0; i < 55; i++)
rel = GNUNET_TIME_relative_multiply (rel, 2);
GNUNET_log_skip (0, GNUNET_NO);
GNUNET_assert (rel.rel_value_us == GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us);
/*check zero */
rel.rel_value_us = (UINT64_MAX) - 1024;
GNUNET_assert (GNUNET_TIME_UNIT_ZERO.rel_value_us ==
GNUNET_TIME_relative_multiply (rel, 0).rel_value_us);
/* test infinity-check for relative to absolute */
GNUNET_log_skip (1, GNUNET_NO);
last = GNUNET_TIME_relative_to_absolute (rel);
GNUNET_assert (last.abs_value_us == GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us);
GNUNET_log_skip (0, GNUNET_YES);
/* check relative to absolute */
rel.rel_value_us = 1000000;
GNUNET_assert (GNUNET_TIME_absolute_get ().abs_value_us <
GNUNET_TIME_relative_to_absolute (rel).abs_value_us);
/*check forever */
rel.rel_value_us = UINT64_MAX;
GNUNET_assert (GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us ==
GNUNET_TIME_relative_to_absolute (rel).abs_value_us);
/* check overflow for r2a */
rel.rel_value_us = (UINT64_MAX) - 1024;
GNUNET_log_skip (1, GNUNET_NO);
last = GNUNET_TIME_relative_to_absolute (rel);
GNUNET_log_skip (0, GNUNET_NO);
GNUNET_assert (last.abs_value_us == GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us);
/* check overflow for relative add */
GNUNET_log_skip (1, GNUNET_NO);
rel = GNUNET_TIME_relative_add (rel, rel);
GNUNET_log_skip (0, GNUNET_NO);
GNUNET_assert (rel.rel_value_us == GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us);
GNUNET_log_skip (1, GNUNET_NO);
rel = GNUNET_TIME_relative_add (relForever, relForever);
GNUNET_log_skip (0, GNUNET_NO);
GNUNET_assert (rel.rel_value_us == relForever.rel_value_us);
GNUNET_log_skip (1, GNUNET_NO);
rel = GNUNET_TIME_relative_add (relUnit, relUnit);
GNUNET_assert (rel.rel_value_us == 2 * relUnit.rel_value_us);
/* check relation check in get_duration */
future.abs_value_us = now.abs_value_us + 1000000;
GNUNET_assert (GNUNET_TIME_absolute_get_difference (now, future).rel_value_us ==
1000000);
GNUNET_assert (GNUNET_TIME_absolute_get_difference (future, now).rel_value_us ==
0);
GNUNET_assert (GNUNET_TIME_absolute_get_difference (zero, forever).rel_value_us
== forever.abs_value_us);
past.abs_value_us = now.abs_value_us - 1000000;
rel = GNUNET_TIME_absolute_get_duration (future);
GNUNET_assert (rel.rel_value_us == 0);
rel = GNUNET_TIME_absolute_get_duration (past);
GNUNET_assert (rel.rel_value_us >= 1000000);
/* check get remaining */
rel = GNUNET_TIME_absolute_get_remaining (now);
GNUNET_assert (rel.rel_value_us == 0);
rel = GNUNET_TIME_absolute_get_remaining (past);
GNUNET_assert (rel.rel_value_us == 0);
rel = GNUNET_TIME_absolute_get_remaining (future);
GNUNET_assert (rel.rel_value_us > 0);
GNUNET_assert (rel.rel_value_us <= 1000000);
forever = GNUNET_TIME_UNIT_FOREVER_ABS;
GNUNET_assert (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us ==
GNUNET_TIME_absolute_get_remaining (forever).rel_value_us);
/* check endianess */
reln = GNUNET_TIME_relative_hton (rel);
GNUNET_assert (rel.rel_value_us == GNUNET_TIME_relative_ntoh (reln).rel_value_us);
nown = GNUNET_TIME_absolute_hton (now);
GNUNET_assert (now.abs_value_us == GNUNET_TIME_absolute_ntoh (nown).abs_value_us);
/* check absolute addition */
future = GNUNET_TIME_absolute_add (now, GNUNET_TIME_UNIT_SECONDS);
GNUNET_assert (future.abs_value_us == now.abs_value_us + 1000 * 1000LL);
future = GNUNET_TIME_absolute_add (forever, GNUNET_TIME_UNIT_ZERO);
GNUNET_assert (future.abs_value_us == forever.abs_value_us);
rel.rel_value_us = (UINT64_MAX) - 1024;
now.abs_value_us = rel.rel_value_us;
future = GNUNET_TIME_absolute_add (now, rel);
GNUNET_assert (future.abs_value_us == forever.abs_value_us);
/* check zero */
future = GNUNET_TIME_absolute_add (now, GNUNET_TIME_UNIT_ZERO);
GNUNET_assert (future.abs_value_us == now.abs_value_us);
GNUNET_assert (forever.abs_value_us ==
GNUNET_TIME_absolute_subtract (forever,
GNUNET_TIME_UNIT_MINUTES).abs_value_us);
/*check absolute subtract */
now.abs_value_us = 50000;
rel.rel_value_us = 100000;
GNUNET_assert (GNUNET_TIME_UNIT_ZERO_ABS.abs_value_us ==
(GNUNET_TIME_absolute_subtract (now, rel)).abs_value_us);
rel.rel_value_us = 10000;
GNUNET_assert (40000 == (GNUNET_TIME_absolute_subtract (now, rel)).abs_value_us);
/*check relative divide */
GNUNET_assert (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us ==
(GNUNET_TIME_relative_divide (rel, 0)).rel_value_us);
rel = GNUNET_TIME_UNIT_FOREVER_REL;
GNUNET_assert (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us ==
(GNUNET_TIME_relative_divide (rel, 2)).rel_value_us);
rel = GNUNET_TIME_relative_divide (relUnit, 2);
GNUNET_assert (rel.rel_value_us == relUnit.rel_value_us / 2);
/* check Return absolute time of 0ms */
zero = GNUNET_TIME_UNIT_ZERO_ABS;
/* check GNUNET_TIME_calculate_eta */
last.abs_value_us = GNUNET_TIME_absolute_get ().abs_value_us - 1024;
forever = GNUNET_TIME_UNIT_FOREVER_ABS;
forever.abs_value_us = forever.abs_value_us - 1024;
GNUNET_assert (GNUNET_TIME_UNIT_ZERO_ABS.abs_value_us ==
GNUNET_TIME_calculate_eta (forever, 50000, 100000).rel_value_us);
/* check zero */
GNUNET_log_skip (1, GNUNET_NO);
GNUNET_assert (GNUNET_TIME_UNIT_ZERO.rel_value_us ==
(GNUNET_TIME_calculate_eta (last, 60000, 50000)).rel_value_us);
GNUNET_log_skip (0, GNUNET_YES);
/*check forever */
GNUNET_assert (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us ==
(GNUNET_TIME_calculate_eta (last, 0, 50000)).rel_value_us);
/*check relative subtract */
now = GNUNET_TIME_absolute_get ();
rel.rel_value_us = now.abs_value_us;
relForever.rel_value_us = rel.rel_value_us + 1024;
GNUNET_assert (1024 ==
GNUNET_TIME_relative_subtract (relForever, rel).rel_value_us);
/*check zero */
GNUNET_assert (GNUNET_TIME_UNIT_ZERO.rel_value_us ==
GNUNET_TIME_relative_subtract (rel, relForever).rel_value_us);
/*check forever */
rel.rel_value_us = UINT64_MAX;
GNUNET_assert (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us ==
GNUNET_TIME_relative_subtract (rel, relForever).rel_value_us);
/*check GNUNET_TIME_relative_min */
now = GNUNET_TIME_absolute_get ();
rel.rel_value_us = now.abs_value_us;
relForever.rel_value_us = rel.rel_value_us - 1024;
GNUNET_assert (relForever.rel_value_us ==
GNUNET_TIME_relative_min (rel, relForever).rel_value_us);
/*check GNUNET_TIME_relative_max */
GNUNET_assert (rel.rel_value_us ==
GNUNET_TIME_relative_max (rel, relForever).rel_value_us);
/*check GNUNET_TIME_absolute_min */
now = GNUNET_TIME_absolute_get ();
last.abs_value_us = now.abs_value_us - 1024;
GNUNET_assert (last.abs_value_us ==
GNUNET_TIME_absolute_min (now, last).abs_value_us);
/*check GNUNET_TIME_absolute_max */
GNUNET_assert (now.abs_value_us ==
GNUNET_TIME_absolute_max (now, last).abs_value_us);
return 0;
}
/**
* Task triggered whenever we receive a SIGCHLD (child
* process died).
*
* @param cls closure, NULL if we need to self-restart
* @param tc context
*/
static void
maint_child_death (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct ServiceList *pos;
struct ServiceList *next;
struct ServiceListeningInfo *sli;
const char *statstr;
int statcode;
int ret;
char c[16];
enum GNUNET_OS_ProcessStatusType statusType;
unsigned long statusCode;
const struct GNUNET_DISK_FileHandle *pr;
pr = GNUNET_DISK_pipe_handle (sigpipe, GNUNET_DISK_PIPE_END_READ);
child_death_task = GNUNET_SCHEDULER_NO_TASK;
if (0 == (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
{
/* shutdown scheduled us, ignore! */
child_death_task =
GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
pr, &maint_child_death, NULL);
return;
}
/* consume the signal */
GNUNET_break (0 < GNUNET_DISK_file_read (pr, &c, sizeof (c)));
/* check for services that died (WAITPID) */
next = running_head;
while (NULL != (pos = next))
{
next = pos->next;
if (pos->proc == NULL)
{
if (GNUNET_YES == in_shutdown)
free_service (pos);
continue;
}
if ((GNUNET_SYSERR ==
(ret =
GNUNET_OS_process_status (pos->proc, &statusType, &statusCode)))
|| ((ret == GNUNET_NO) || (statusType == GNUNET_OS_PROCESS_STOPPED)
|| (statusType == GNUNET_OS_PROCESS_RUNNING)))
continue;
if (statusType == GNUNET_OS_PROCESS_EXITED)
{
statstr = _( /* process termination method */ "exit");
statcode = statusCode;
}
else if (statusType == GNUNET_OS_PROCESS_SIGNALED)
{
statstr = _( /* process termination method */ "signal");
statcode = statusCode;
}
else
{
statstr = _( /* process termination method */ "unknown");
statcode = 0;
}
if (0 != pos->killed_at.abs_value)
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Service `%s' took %llu ms to terminate\n"),
pos->name,
GNUNET_TIME_absolute_get_duration (pos->killed_at).rel_value);
}
GNUNET_OS_process_destroy (pos->proc);
pos->proc = NULL;
if (NULL != pos->killing_client)
{
signal_result (pos->killing_client, pos->name,
GNUNET_ARM_PROCESS_DOWN);
GNUNET_SERVER_client_drop (pos->killing_client);
pos->killing_client = NULL;
/* process can still be re-started on-demand, ensure it is re-started if there is demand */
for (sli = pos->listen_head; NULL != sli; sli = sli->next)
{
GNUNET_break (GNUNET_SCHEDULER_NO_TASK == sli->accept_task);
sli->accept_task =
GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
sli->listen_socket,
&accept_connection, sli);
}
continue;
}
if (GNUNET_YES != in_shutdown)
{
if ((statusType == GNUNET_OS_PROCESS_EXITED) && (statcode == 0))
{
/* process terminated normally, allow restart at any time */
pos->restart_at.abs_value = 0;
}
else
{
if (0 == (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_
("Service `%s' terminated with status %s/%d, will restart in %llu ms\n"),
pos->name, statstr, statcode, pos->backoff.rel_value);
/* schedule restart */
pos->restart_at = GNUNET_TIME_relative_to_absolute (pos->backoff);
pos->backoff =
GNUNET_TIME_relative_min (EXPONENTIAL_BACKOFF_THRESHOLD,
GNUNET_TIME_relative_multiply
(pos->backoff, 2));
}
if (GNUNET_SCHEDULER_NO_TASK != child_restart_task)
GNUNET_SCHEDULER_cancel (child_restart_task);
child_restart_task =
GNUNET_SCHEDULER_add_with_priority
(GNUNET_SCHEDULER_PRIORITY_IDLE,
&delayed_restart_task, NULL);
}
else
{
free_service (pos);
}
}
child_death_task =
GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
pr, &maint_child_death, NULL);
if ((NULL == running_head) && (GNUNET_YES == in_shutdown))
do_shutdown ();
}
/**
* Task run whenever it is time to restart a child that died.
*
* @param cls closure, always NULL
* @param tc context
*/
static void
delayed_restart_task (void *cls,
const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct ServiceList *sl;
struct GNUNET_TIME_Relative lowestRestartDelay;
struct ServiceListeningInfo *sli;
child_restart_task = GNUNET_SCHEDULER_NO_TASK;
if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
return;
GNUNET_assert (GNUNET_NO == in_shutdown);
lowestRestartDelay = GNUNET_TIME_UNIT_FOREVER_REL;
/* check for services that need to be restarted due to
* configuration changes or because the last restart failed */
for (sl = running_head; NULL != sl; sl = sl->next)
{
if (NULL != sl->proc)
continue;
/* service is currently not running */
if (GNUNET_TIME_absolute_get_remaining (sl->restart_at).rel_value ==
0)
{
/* restart is now allowed */
if (sl->is_default)
{
/* process should run by default, start immediately */
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Restarting service `%s'.\n"), sl->name);
start_process (sl);
}
else
{
/* process is run on-demand, ensure it is re-started if there is demand */
for (sli = sl->listen_head; NULL != sli; sli = sli->next)
if (GNUNET_SCHEDULER_NO_TASK == sli->accept_task)
{
/* accept was actually paused, so start it again */
sli->accept_task =
GNUNET_SCHEDULER_add_read_net
(GNUNET_TIME_UNIT_FOREVER_REL, sli->listen_socket,
&accept_connection, sli);
}
}
}
else
{
/* update calculation for earliest time to reactivate a service */
lowestRestartDelay =
GNUNET_TIME_relative_min (lowestRestartDelay,
GNUNET_TIME_absolute_get_remaining
(sl->restart_at));
}
}
if (lowestRestartDelay.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Will restart process in %llums\n",
(unsigned long long) lowestRestartDelay.rel_value);
child_restart_task =
GNUNET_SCHEDULER_add_delayed_with_priority (lowestRestartDelay,
GNUNET_SCHEDULER_PRIORITY_IDLE,
&delayed_restart_task, NULL);
}
}
/**
* Periodically announce self id in the DHT
*
* @param cls closure
*/
static void
announce_id (void *cls)
{
struct GNUNET_HashCode phash;
const struct GNUNET_HELLO_Message *hello;
size_t size;
struct GNUNET_TIME_Absolute expiration;
struct GNUNET_TIME_Relative next_put;
hello = GCH_get_mine ();
size = (NULL != hello) ? GNUNET_HELLO_size (hello) : 0;
if (0 == size)
{
expiration = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
announce_delay);
announce_delay = GNUNET_TIME_STD_BACKOFF (announce_delay);
}
else
{
expiration = GNUNET_HELLO_get_last_expiration (hello);
announce_delay = GNUNET_TIME_UNIT_SECONDS;
}
/* Call again in id_announce_time, unless HELLO expires first,
* but wait at least 1s. */
next_put
= GNUNET_TIME_absolute_get_remaining (expiration);
next_put
= GNUNET_TIME_relative_min (next_put,
id_announce_time);
next_put
= GNUNET_TIME_relative_max (next_put,
GNUNET_TIME_UNIT_SECONDS);
announce_id_task
= GNUNET_SCHEDULER_add_delayed (next_put,
&announce_id,
cls);
GNUNET_STATISTICS_update (stats,
"# DHT announce",
1,
GNUNET_NO);
memset (&phash,
0,
sizeof (phash));
GNUNET_memcpy (&phash,
&my_full_id,
sizeof (my_full_id));
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Announcing my HELLO (%u bytes) in the DHT\n",
size);
GNUNET_DHT_put (dht_handle, /* DHT handle */
&phash, /* Key to use */
dht_replication_level, /* Replication level */
GNUNET_DHT_RO_RECORD_ROUTE
| GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
GNUNET_BLOCK_TYPE_DHT_HELLO, /* Block type */
size, /* Size of the data */
(const char *) hello, /* Data itself */
expiration, /* Data expiration */
NULL, /* Continuation */
NULL); /* Continuation closure */
}