/**
* Called with any sensor reading messages received from CADET.
*
* Each time the function must call #GNUNET_CADET_receive_done on the channel
* in order to receive the next message. This doesn't need to be immediate:
* can be delayed if some processing is done on the message.
*
* @param cls Closure (set from #GNUNET_CADET_connect).
* @param channel Connection to the other end.
* @param channel_ctx Place to store local state associated with the channel.
* @param message The actual message.
* @return #GNUNET_OK to keep the channel open,
* #GNUNET_SYSERR to close it (signal serious error).
*/
static int
handle_sensor_reading (void *cls, struct GNUNET_CADET_Channel *channel,
void **channel_ctx,
const struct GNUNET_MessageHeader *message)
{
struct ClientPeerContext *cp = *channel_ctx;
struct ClientSensorReading *reading;
reading = parse_reading_message (message, sensors);
if (NULL == reading)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
"Received an invalid sensor reading from peer `%s'.\n",
GNUNET_i2s (&cp->peerid));
return GNUNET_SYSERR;
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Received a sensor reading from peer `%s':\n"
"# Sensor name: `%s'\n" "# Timestamp: %" PRIu64 "\n"
"# Value size: %" PRIu64 ".\n", GNUNET_i2s (&cp->peerid),
reading->sensor->name, reading->timestamp, reading->value_size);
GNUNET_PEERSTORE_store (peerstore, values_subsystem, &cp->peerid,
reading->sensor->name, reading->value,
reading->value_size, GNUNET_TIME_UNIT_FOREVER_ABS,
GNUNET_PEERSTORE_STOREOPTION_MULTIPLE, NULL, NULL);
GNUNET_free (reading->value);
GNUNET_free (reading);
GNUNET_CADET_receive_done (channel);
return GNUNET_OK;
}
/**
* Function to handle a ring message incoming over cadet
*
* @param cls closure, NULL
* @param channel the channel over which the message arrived
* @param channel_ctx the channel context, can be NULL
* or point to the `struct Channel`
* @param message the incoming message
* @return #GNUNET_OK
*/
static int
handle_cadet_ring_message (void *cls,
struct GNUNET_CADET_Channel *channel,
void **channel_ctx,
const struct GNUNET_MessageHeader *message)
{
struct Channel *ch = *channel_ctx;
struct Line *line = ch->line;
const struct CadetPhoneRingMessage *msg;
struct GNUNET_MQ_Envelope *env;
struct ClientPhoneRingMessage *cring;
struct CadetPhoneRingInfoPS rs;
msg = (const struct CadetPhoneRingMessage *) message;
rs.purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_CONVERSATION_RING);
rs.purpose.size = htonl (sizeof (struct CadetPhoneRingInfoPS));
rs.line_port = line->line_port;
rs.target_peer = my_identity;
rs.expiration_time = msg->expiration_time;
if (GNUNET_OK !=
GNUNET_CRYPTO_ecdsa_verify (GNUNET_SIGNATURE_PURPOSE_CONVERSATION_RING,
&rs.purpose,
&msg->signature,
&msg->caller_id))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
if (0 == GNUNET_TIME_absolute_get_remaining (GNUNET_TIME_absolute_ntoh (msg->expiration_time)).rel_value_us)
{
/* ancient call, replay? */
GNUNET_break_op (0);
/* Note that our reliance on time here is awkward; better would be
to use a more complex challenge-response protocol against
replay attacks. Left for future work ;-). */
return GNUNET_SYSERR;
}
if (CS_CALLEE_INIT != ch->status)
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
GNUNET_CADET_receive_done (channel);
ch->status = CS_CALLEE_RINGING;
env = GNUNET_MQ_msg (cring,
GNUNET_MESSAGE_TYPE_CONVERSATION_CS_PHONE_RING);
cring->cid = ch->cid;
cring->caller_id = msg->caller_id;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Sending RING message to client. CID is %u\n",
(unsigned int) ch->cid);
GNUNET_MQ_send (line->mq,
env);
return GNUNET_OK;
}
/**
* Function to handle a resume message incoming over cadet
*
* @param cls closure, NULL
* @param channel the channel over which the message arrived
* @param channel_ctx the channel context, can be NULL
* or point to the `struct Channel`
* @param message the incoming message
* @return #GNUNET_OK
*/
static int
handle_cadet_resume_message (void *cls,
struct GNUNET_CADET_Channel *channel,
void **channel_ctx,
const struct GNUNET_MessageHeader *message)
{
struct Channel *ch = *channel_ctx;
struct Line *line;
struct GNUNET_MQ_Envelope *env;
struct ClientPhoneResumeMessage *resume;
if (NULL == ch)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"RESUME message received for non-existing line, dropping channel.\n");
return GNUNET_SYSERR;
}
line = ch->line;
GNUNET_CADET_receive_done (channel);
if (GNUNET_YES != ch->suspended_remote)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"RESUME message received for non-suspended channel, dropping channel.\n");
return GNUNET_SYSERR;
}
switch (ch->status)
{
case CS_CALLEE_INIT:
GNUNET_break (0);
break;
case CS_CALLEE_RINGING:
GNUNET_break (0);
break;
case CS_CALLEE_CONNECTED:
ch->suspended_remote = GNUNET_NO;
break;
case CS_CALLEE_SHUTDOWN:
return GNUNET_OK;
case CS_CALLER_CALLING:
GNUNET_break (0);
break;
case CS_CALLER_CONNECTED:
ch->suspended_remote = GNUNET_NO;
break;
case CS_CALLER_SHUTDOWN:
return GNUNET_OK;
}
env = GNUNET_MQ_msg (resume,
GNUNET_MESSAGE_TYPE_CONVERSATION_CS_PHONE_RESUME);
resume->cid = ch->cid;
GNUNET_MQ_send (line->mq,
env);
return GNUNET_OK;
}
/**
* Called with any anomaly report received from a peer.
*
* Each time the function must call #GNUNET_CADET_receive_done on the channel
* in order to receive the next message. This doesn't need to be immediate:
* can be delayed if some processing is done on the message.
*
* @param cls Closure (set from #GNUNET_CADET_connect).
* @param channel Connection to the other end.
* @param channel_ctx Place to store local state associated with the channel.
* @param message The actual message.
* @return #GNUNET_OK to keep the channel open,
* #GNUNET_SYSERR to close it (signal serious error).
*/
static int
handle_anomaly_report (void *cls, struct GNUNET_CADET_Channel *channel,
void **channel_ctx,
const struct GNUNET_MessageHeader *message)
{
struct ClientPeerContext *cp = *channel_ctx;
struct GNUNET_SENSOR_crypto_pow_block *report_block;
struct GNUNET_SENSOR_AnomalyReportMessage *anomaly_msg;
struct GNUNET_SENSOR_SensorInfo *sensor;
struct GNUNET_SENSOR_DashboardAnomalyEntry *anomaly_entry;
struct GNUNET_TIME_Absolute expiry;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received an anomaly report message from peer `%s'.\n",
GNUNET_i2s (&cp->peerid));
report_block = (struct GNUNET_SENSOR_crypto_pow_block *) &message[1];
if (sizeof (struct GNUNET_SENSOR_AnomalyReportMessage) !=
GNUNET_SENSOR_crypto_verify_pow_sign (report_block, pow_matching_bits,
&cp->peerid.public_key,
(void **) &anomaly_msg))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
"Received invalid anomaly report from peer `%s'.\n",
GNUNET_i2s (&cp->peerid));
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
sensor =
GNUNET_CONTAINER_multihashmap_get (sensors,
&anomaly_msg->sensorname_hash);
if (NULL == sensor)
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
anomaly_entry = GNUNET_new (struct GNUNET_SENSOR_DashboardAnomalyEntry);
anomaly_entry->anomalous = ntohs (anomaly_msg->anomalous);
anomaly_entry->anomalous_neighbors = anomaly_msg->anomalous_neighbors;
expiry =
(GNUNET_YES ==
anomaly_entry->anomalous) ? GNUNET_TIME_UNIT_FOREVER_ABS :
GNUNET_TIME_absolute_get ();
GNUNET_PEERSTORE_store (peerstore, anomalies_subsystem, &cp->peerid,
sensor->name, anomaly_entry,
sizeof (struct GNUNET_SENSOR_DashboardAnomalyEntry),
expiry, GNUNET_PEERSTORE_STOREOPTION_REPLACE, NULL,
NULL);
GNUNET_free (anomaly_entry);
GNUNET_CADET_receive_done (channel);
return GNUNET_OK;
}
/**
* Function is called whenever a message is received.
*
* @param cls closure (set from GNUNET_CADET_connect)
* @param channel connection to the other end
* @param channel_ctx place to store local state associated with the channel
* @param message the actual message
*
* @return GNUNET_OK to keep the connection open,
* GNUNET_SYSERR to close it (signal serious error)
*/
static int
data_callback (void *cls, struct GNUNET_CADET_Channel *channel,
void **channel_ctx,
const struct GNUNET_MessageHeader *message)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Data callback! Shutting down.\n");
got_data = GNUNET_YES;
if (NULL != shutdown_task)
GNUNET_SCHEDULER_cancel (shutdown_task);
shutdown_task =
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS, &do_shutdown,
NULL);
GNUNET_CADET_receive_done (channel);
return GNUNET_OK;
}
/**
* Function to handle a suspend message incoming over cadet
*
* @param cls closure, NULL
* @param channel the channel over which the message arrived
* @param channel_ctx the channel context, can be NULL
* or point to the `struct Channel`
* @param message the incoming message
* @return #GNUNET_OK
*/
static int
handle_cadet_suspend_message (void *cls,
struct GNUNET_CADET_Channel *channel,
void **channel_ctx,
const struct GNUNET_MessageHeader *message)
{
struct Channel *ch = *channel_ctx;
struct Line *line = ch->line;
struct GNUNET_MQ_Envelope *env;
struct ClientPhoneSuspendMessage *suspend;
GNUNET_CADET_receive_done (channel);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Suspending channel CID: %u\n",
ch->cid);
switch (ch->status)
{
case CS_CALLEE_INIT:
GNUNET_break_op (0);
break;
case CS_CALLEE_RINGING:
GNUNET_break_op (0);
break;
case CS_CALLEE_CONNECTED:
ch->suspended_remote = GNUNET_YES;
break;
case CS_CALLEE_SHUTDOWN:
return GNUNET_OK;
case CS_CALLER_CALLING:
GNUNET_break_op (0);
break;
case CS_CALLER_CONNECTED:
ch->suspended_remote = GNUNET_YES;
break;
case CS_CALLER_SHUTDOWN:
return GNUNET_OK;
}
env = GNUNET_MQ_msg (suspend,
GNUNET_MESSAGE_TYPE_CONVERSATION_CS_PHONE_SUSPEND);
suspend->cid = ch->cid;
GNUNET_MQ_send (line->mq,
env);
return GNUNET_OK;
}
/**
* Function to handle a pickup message incoming over cadet
*
* @param cls closure, NULL
* @param channel the channel over which the message arrived
* @param channel_ctx the channel context, can be NULL
* or point to the `struct Channel`
* @param message the incoming message
* @return #GNUNET_OK if message was OK,
* #GNUNET_SYSERR if message violated the protocol
*/
static int
handle_cadet_pickup_message (void *cls,
struct GNUNET_CADET_Channel *channel,
void **channel_ctx,
const struct GNUNET_MessageHeader *message)
{
struct Channel *ch = *channel_ctx;
struct Line *line = ch->line;
struct GNUNET_MQ_Envelope *env;
struct ClientPhonePickedupMessage *pick;
GNUNET_CADET_receive_done (channel);
switch (ch->status)
{
case CS_CALLEE_INIT:
case CS_CALLEE_RINGING:
case CS_CALLEE_CONNECTED:
GNUNET_break_op (0);
destroy_line_cadet_channels (ch);
return GNUNET_SYSERR;
case CS_CALLEE_SHUTDOWN:
GNUNET_break_op (0);
destroy_line_cadet_channels (ch);
return GNUNET_SYSERR;
case CS_CALLER_CALLING:
ch->status = CS_CALLER_CONNECTED;
break;
case CS_CALLER_CONNECTED:
GNUNET_break_op (0);
return GNUNET_OK;
case CS_CALLER_SHUTDOWN:
GNUNET_break_op (0);
mq_done_finish_caller_shutdown (ch);
return GNUNET_SYSERR;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Sending PICKED UP message to client\n");
env = GNUNET_MQ_msg (pick,
GNUNET_MESSAGE_TYPE_CONVERSATION_CS_PHONE_PICKED_UP);
pick->cid = ch->cid;
GNUNET_MQ_send (line->mq,
env);
return GNUNET_OK;
}
/**
* Function to handle a hangup message incoming over cadet
*
* @param cls closure, NULL
* @param channel the channel over which the message arrived
* @param channel_ctx the channel context, can be NULL
* or point to the `struct Channel`
* @param message the incoming message
* @return #GNUNET_OK
*/
static int
handle_cadet_hangup_message (void *cls,
struct GNUNET_CADET_Channel *channel,
void **channel_ctx,
const struct GNUNET_MessageHeader *message)
{
struct Channel *ch = *channel_ctx;
struct Line *line = ch->line;
struct GNUNET_MQ_Envelope *env;
struct ClientPhoneHangupMessage *hup;
enum ChannelStatus status;
uint32_t cid;
GNUNET_CADET_receive_done (channel);
cid = ch->cid;
status = ch->status;
destroy_line_cadet_channels (ch);
switch (status)
{
case CS_CALLEE_INIT:
GNUNET_break_op (0);
return GNUNET_OK;
case CS_CALLEE_RINGING:
case CS_CALLEE_CONNECTED:
break;
case CS_CALLEE_SHUTDOWN:
return GNUNET_OK;
case CS_CALLER_CALLING:
case CS_CALLER_CONNECTED:
break;
case CS_CALLER_SHUTDOWN:
return GNUNET_OK;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Sending HANG UP message to client\n");
env = GNUNET_MQ_msg (hup,
GNUNET_MESSAGE_TYPE_CONVERSATION_CS_PHONE_HANG_UP);
hup->cid = cid;
GNUNET_MQ_send (line->mq,
env);
return GNUNET_OK;
}
/**
* Called with any sensor list request received.
*
* Each time the function must call #GNUNET_CADET_receive_done on the channel
* in order to receive the next message. This doesn't need to be immediate:
* can be delayed if some processing is done on the message.
*
* @param cls Closure (set from #GNUNET_CADET_connect).
* @param channel Connection to the other end.
* @param channel_ctx Place to store local state associated with the channel.
* @param message The actual message.
* @return #GNUNET_OK to keep the channel open,
* #GNUNET_SYSERR to close it (signal serious error).
*/
static int
handle_sensor_list_req (void *cls, struct GNUNET_CADET_Channel *channel,
void **channel_ctx,
const struct GNUNET_MessageHeader *message)
{
struct ClientPeerContext *cp = *channel_ctx;
struct GNUNET_MessageHeader *end_msg;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received a sensor list request from peer `%s'.\n",
GNUNET_i2s (&cp->peerid));
GNUNET_CONTAINER_multihashmap_iterate (sensors, &send_sensor_brief, cp);
end_msg = GNUNET_new (struct GNUNET_MessageHeader);
end_msg->size = htons (sizeof (struct GNUNET_MessageHeader));
end_msg->type = htons (GNUNET_MESSAGE_TYPE_SENSOR_END);
queue_msg (end_msg, cp);
GNUNET_CADET_receive_done (channel);
return GNUNET_OK;
}
/**
* Called with any request for full sensor information.
*
* Each time the function must call #GNUNET_CADET_receive_done on the channel
* in order to receive the next message. This doesn't need to be immediate:
* can be delayed if some processing is done on the message.
*
* @param cls Closure (set from #GNUNET_CADET_connect).
* @param channel Connection to the other end.
* @param channel_ctx Place to store local state associated with the channel.
* @param message The actual message.
* @return #GNUNET_OK to keep the channel open,
* #GNUNET_SYSERR to close it (signal serious error).
*/
static int
handle_sensor_full_req (void *cls, struct GNUNET_CADET_Channel *channel,
void **channel_ctx,
const struct GNUNET_MessageHeader *message)
{
struct ClientPeerContext *cp = *channel_ctx;
struct GNUNET_SENSOR_SensorBriefMessage *sbm = NULL;
struct GNUNET_SENSOR_SensorFullMessage *sfm;
uint16_t msg_size;
uint16_t sensorname_size;
msg_size = ntohs (message->size);
/* parse & error check */
if (msg_size > sizeof (struct GNUNET_SENSOR_SensorBriefMessage))
{
sbm = (struct GNUNET_SENSOR_SensorBriefMessage *) message;
sensorname_size = ntohs (sbm->name_size);
if (msg_size !=
sizeof (struct GNUNET_SENSOR_SensorBriefMessage) + sensorname_size)
sbm = NULL;
}
if (NULL == sbm)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Received an invalid full sensor request from peer `%s'.\n",
GNUNET_i2s (&cp->peerid));
return GNUNET_SYSERR;
}
/* Create and send msg with full sensor info */
sfm = create_full_sensor_msg ((char *) &sbm[1]);
if (NULL == sfm)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Error creating full sensor info msg for sensor `%s'.\n",
(char *) &sbm[1]);
return GNUNET_SYSERR;
}
queue_msg ((struct GNUNET_MessageHeader *) sfm, cp);
GNUNET_CADET_receive_done (channel);
return GNUNET_OK;
}
/**
* Function to handle an audio message incoming over cadet
*
* @param cls closure, NULL
* @param channel the channel over which the message arrived
* @param channel_ctx the channel context, can be NULL
* or point to the `struct Channel`
* @param message the incoming message
* @return #GNUNET_OK
*/
static int
handle_cadet_audio_message (void *cls,
struct GNUNET_CADET_Channel *channel,
void **channel_ctx,
const struct GNUNET_MessageHeader *message)
{
struct Channel *ch = *channel_ctx;
const struct CadetAudioMessage *msg;
size_t msize = ntohs (message->size) - sizeof (struct CadetAudioMessage);
struct GNUNET_MQ_Envelope *env;
struct ClientAudioMessage *cam;
msg = (const struct CadetAudioMessage *) message;
GNUNET_CADET_receive_done (channel);
if ( (GNUNET_YES == ch->suspended_local) ||
(GNUNET_YES == ch->suspended_remote) )
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received %u bytes of AUDIO data on suspended channel CID %u; dropping\n",
(unsigned int) msize,
ch->cid);
return GNUNET_OK;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Forwarding %u bytes of AUDIO data to client CID %u\n",
(unsigned int) msize,
ch->cid);
env = GNUNET_MQ_msg_extra (cam,
msize,
GNUNET_MESSAGE_TYPE_CONVERSATION_CS_AUDIO);
cam->cid = ch->cid;
GNUNET_memcpy (&cam[1],
&msg[1],
msize);
GNUNET_MQ_send (ch->line->mq,
env);
return GNUNET_OK;
}
/**
* Callback for set operation results. Called for each element
* that needs to be removed from the result set.
*
* @param cls closure with the `struct BobServiceSession`
* @param element a result element, only valid if status is #GNUNET_SET_STATUS_OK
* @param status what has happened with the set intersection?
*/
static void
cb_intersection_element_removed (void *cls,
const struct GNUNET_SET_Element *element,
enum GNUNET_SET_Status status)
{
struct BobServiceSession *s = cls;
struct GNUNET_SCALARPRODUCT_Element *se;
switch (status)
{
case GNUNET_SET_STATUS_OK:
/* this element has been removed from the set */
se = GNUNET_CONTAINER_multihashmap_get (s->intersected_elements,
element->data);
GNUNET_assert (NULL != se);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Removed element with key %s and value %lld\n",
GNUNET_h2s (&se->key),
(long long) GNUNET_ntohll (se->value));
GNUNET_assert (GNUNET_YES ==
GNUNET_CONTAINER_multihashmap_remove (s->intersected_elements,
element->data,
se));
GNUNET_free (se);
return;
case GNUNET_SET_STATUS_DONE:
s->intersection_op = NULL;
GNUNET_break (NULL == s->intersection_set);
GNUNET_CADET_receive_done (s->cadet->channel);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Finished intersection, %d items remain\n",
GNUNET_CONTAINER_multihashmap_size (s->intersected_elements));
if (s->client_received_element_count ==
GNUNET_CONTAINER_multihashmap_size (s->intersected_elements))
{
/* CADET transmission from Alice is also already done,
start with our own reply */
transmit_bobs_cryptodata_message (s);
}
return;
case GNUNET_SET_STATUS_HALF_DONE:
/* unexpected for intersection */
GNUNET_break (0);
return;
case GNUNET_SET_STATUS_FAILURE:
/* unhandled status code */
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Set intersection failed!\n");
s->intersection_op = NULL;
if (NULL != s->intersection_set)
{
GNUNET_SET_destroy (s->intersection_set);
s->intersection_set = NULL;
}
s->status = GNUNET_SCALARPRODUCT_STATUS_FAILURE;
prepare_client_end_notification (s);
return;
default:
GNUNET_break (0);
return;
}
}
/**
* Handle a multipart-chunk of a request from another service to
* calculate a scalarproduct with us.
*
* @param cls closure (set from #GNUNET_CADET_connect)
* @param channel connection to the other end
* @param channel_ctx place to store local state associated with the @a channel
* @param message the actual message
* @return #GNUNET_OK to keep the connection open,
* #GNUNET_SYSERR to close it (signal serious error)
*/
static int
handle_alices_cryptodata_message (void *cls,
struct GNUNET_CADET_Channel *channel,
void **channel_ctx,
const struct GNUNET_MessageHeader *message)
{
struct CadetIncomingSession *in = *channel_ctx;
struct BobServiceSession *s;
const struct EccAliceCryptodataMessage *msg;
const struct GNUNET_CRYPTO_EccPoint *payload;
uint32_t contained_elements;
size_t msg_length;
uint16_t msize;
unsigned int max;
unsigned int i;
const struct MpiElement *b_i;
gcry_mpi_point_t tmp;
gcry_mpi_point_t g_i;
gcry_mpi_point_t h_i;
gcry_mpi_point_t g_i_b_i;
gcry_mpi_point_t h_i_b_i;
/* sanity checks */
if (NULL == in)
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
s = in->s;
if (NULL == s)
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
/* sort our vector for the computation */
if (NULL == s->sorted_elements)
{
s->sorted_elements
= GNUNET_malloc (GNUNET_CONTAINER_multihashmap_size (s->intersected_elements) *
sizeof (struct MpiElement));
s->used_element_count = 0;
GNUNET_CONTAINER_multihashmap_iterate (s->intersected_elements,
©_element_cb,
s);
qsort (s->sorted_elements,
s->used_element_count,
sizeof (struct MpiElement),
&element_cmp);
}
/* parse message */
msize = ntohs (message->size);
if (msize <= sizeof (struct EccAliceCryptodataMessage))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
msg = (const struct EccAliceCryptodataMessage *) message;
contained_elements = ntohl (msg->contained_element_count);
/* Our intersection may still be ongoing, but this is nevertheless
an upper bound on the required array size */
max = GNUNET_CONTAINER_multihashmap_size (s->intersected_elements);
msg_length = sizeof (struct EccAliceCryptodataMessage)
+ contained_elements * sizeof (struct GNUNET_CRYPTO_EccPoint) * 2;
if ( (msize != msg_length) ||
(0 == contained_elements) ||
(contained_elements > UINT16_MAX) ||
(max < contained_elements + s->cadet_received_element_count) )
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received %u crypto values from Alice\n",
(unsigned int) contained_elements);
payload = (const struct GNUNET_CRYPTO_EccPoint *) &msg[1];
for (i=0;i<contained_elements;i++)
{
b_i = &s->sorted_elements[i + s->cadet_received_element_count];
g_i = GNUNET_CRYPTO_ecc_bin_to_point (edc,
&payload[i * 2]);
g_i_b_i = GNUNET_CRYPTO_ecc_pmul_mpi (edc,
g_i,
b_i->value);
gcry_mpi_point_release (g_i);
h_i = GNUNET_CRYPTO_ecc_bin_to_point (edc,
&payload[i * 2 + 1]);
h_i_b_i = GNUNET_CRYPTO_ecc_pmul_mpi (edc,
h_i,
b_i->value);
gcry_mpi_point_release (h_i);
if (0 == i + s->cadet_received_element_count)
{
/* first iteration, nothing to add */
s->prod_g_i_b_i = g_i_b_i;
s->prod_h_i_b_i = h_i_b_i;
}
else
{
/* further iterations, cummulate resulting value */
tmp = GNUNET_CRYPTO_ecc_add (edc,
s->prod_g_i_b_i,
g_i_b_i);
gcry_mpi_point_release (s->prod_g_i_b_i);
gcry_mpi_point_release (g_i_b_i);
s->prod_g_i_b_i = tmp;
tmp = GNUNET_CRYPTO_ecc_add (edc,
s->prod_h_i_b_i,
h_i_b_i);
gcry_mpi_point_release (s->prod_h_i_b_i);
gcry_mpi_point_release (h_i_b_i);
s->prod_h_i_b_i = tmp;
}
}
s->cadet_received_element_count += contained_elements;
if ( (s->cadet_received_element_count == max) &&
(NULL == s->intersection_op) )
{
/* intersection has finished also on our side, and
we got the full set, so we can proceed with the
CADET response(s) */
transmit_bobs_cryptodata_message (s);
}
GNUNET_CADET_receive_done (s->cadet->channel);
return GNUNET_OK;
}
/**
* Function is called whenever a message is received.
*
* @param cls closure (set from GNUNET_CADET_connect, peer number)
* @param channel connection to the other end
* @param channel_ctx place to store local state associated with the channel
* @param message the actual message
* @return GNUNET_OK to keep the connection open,
* GNUNET_SYSERR to close it (signal serious error)
*/
int
data_callback (void *cls, struct GNUNET_CADET_Channel *channel,
void **channel_ctx,
const struct GNUNET_MessageHeader *message)
{
struct GNUNET_CADET_TransmitHandle **pth;
long client = (long) cls;
long expected_target_client;
uint32_t *data;
uint32_t payload;
unsigned int counter;
ok++;
counter = get_expected_target () == client ? data_received : ack_received;
GNUNET_CADET_receive_done (channel);
if ((ok % 10) == 0)
{
if (NULL != disconnect_task)
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO, " reschedule timeout\n");
GNUNET_SCHEDULER_cancel (disconnect_task);
disconnect_task = GNUNET_SCHEDULER_add_delayed (SHORT_TIME,
&gather_stats_and_exit,
(void *) __LINE__);
}
}
switch (client)
{
case 0L:
GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Root client got a message!\n");
GNUNET_assert (channel == ch);
pth = &th;
break;
case 1L:
case 4L:
GNUNET_assert (client == peers_requested - 1);
GNUNET_assert (channel == incoming_ch);
pth = &incoming_th;
GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Leaf client %ld got a message.\n",
client);
break;
default:
GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Client %ld not valid.\n", client);
GNUNET_assert (0);
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO, " ok: (%d/%d)\n", ok, ok_goal);
data = (uint32_t *) &message[1];
payload = ntohl (*data);
if (payload == counter)
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO, " payload as expected: %u\n", payload);
}
else
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " payload %u, expected: %u\n",
payload, counter);
}
expected_target_client = get_expected_target ();
if (GNUNET_NO == initialized)
{
initialized = GNUNET_YES;
start_time = GNUNET_TIME_absolute_get ();
if (SPEED == test)
{
GNUNET_assert (peers_requested - 1 == client);
data_job = GNUNET_SCHEDULER_add_now (&data_task, NULL);
return GNUNET_OK;
}
}
counter++;
if (client == expected_target_client) /* Normally 4 */
{
data_received++;
GNUNET_log (GNUNET_ERROR_TYPE_INFO, " received data %u\n", data_received);
if (SPEED != test || (ok_goal - 2) == ok)
{
/* Send ACK */
GNUNET_assert (NULL == *pth);
*pth = GNUNET_CADET_notify_transmit_ready (channel, GNUNET_NO,
GNUNET_TIME_UNIT_FOREVER_REL,
size_payload + ack_sent,
&tmt_rdy, (void *) client);
return GNUNET_OK;
}
else
{
if (data_received < TOTAL_PACKETS)
return GNUNET_OK;
}
}
else /* Normally 0 */
{
if (SPEED_ACK == test || SPEED == test)
{
ack_received++;
GNUNET_log (GNUNET_ERROR_TYPE_INFO, " received ack %u\n", ack_received);
/* send more data */
GNUNET_assert (NULL == *pth);
*pth = GNUNET_CADET_notify_transmit_ready (channel, GNUNET_NO,
GNUNET_TIME_UNIT_FOREVER_REL,
size_payload + data_sent,
&tmt_rdy, (void *) client);
if (ack_received < TOTAL_PACKETS && SPEED != test)
return GNUNET_OK;
if (ok == 2 && SPEED == test)
return GNUNET_OK;
show_end_data();
}
if (test == P2P_SIGNAL)
{
if (NULL != incoming_th)
{
GNUNET_CADET_notify_transmit_ready_cancel (incoming_th);
incoming_th = NULL;
}
GNUNET_CADET_channel_destroy (incoming_ch);
incoming_ch = NULL;
}
else
{
if (NULL != th)
{
GNUNET_CADET_notify_transmit_ready_cancel (th);
th = NULL;
}
GNUNET_CADET_channel_destroy (ch);
ch = NULL;
}
}
return GNUNET_OK;
}