/**
* Transmit our HELLO message to the given (connected) neighbour.
*
* @param cls the 'HELLO' message
* @param peer identity of the peer
* @param address the address
* @param state current state this peer is in
* @param state_timeout timeout for the current state of the peer
* @param bandwidth_in inbound quota in NBO
* @param bandwidth_out outbound quota in NBO
*/
static void
transmit_our_hello (void *cls,
const struct GNUNET_PeerIdentity *peer,
const struct GNUNET_HELLO_Address *address,
enum GNUNET_TRANSPORT_PeerState state,
struct GNUNET_TIME_Absolute state_timeout,
struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
{
const struct GNUNET_MessageHeader *hello = cls;
if (0 ==
memcmp (peer,
&GST_my_identity,
sizeof (struct GNUNET_PeerIdentity)))
return; /* not to ourselves */
if (GNUNET_NO == GST_neighbours_test_connected (peer))
return;
GST_neighbours_send (peer,
hello,
ntohs (hello->size),
hello_expiration,
NULL, NULL);
}
/**
* Function called for each of our connected neighbours. Notify the
* client about the existing neighbour.
*
* @param cls the `struct TransportClient *` to notify
* @param peer identity of the neighbour
* @param address the address
* @param state the current state of the peer
* @param state_timeout the time out for the state
* @param bandwidth_in inbound bandwidth in NBO
* @param bandwidth_out outbound bandwidth in NBO
*/
static void
notify_client_about_neighbour (void *cls,
const struct GNUNET_PeerIdentity *peer,
const struct GNUNET_HELLO_Address *address,
enum GNUNET_TRANSPORT_PeerState state,
struct GNUNET_TIME_Absolute state_timeout,
struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
{
struct TransportClient *tc = cls;
struct ConnectInfoMessage *cim;
size_t size = sizeof (struct ConnectInfoMessage);
char buf[size] GNUNET_ALIGN;
if (GNUNET_NO == GST_neighbours_test_connected (peer))
return;
GNUNET_assert (size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
cim = (struct ConnectInfoMessage *) buf;
cim->header.size = htons (size);
cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
cim->id = *peer;
cim->quota_in = bandwidth_in;
cim->quota_out = bandwidth_out;
unicast (tc, &cim->header, GNUNET_NO);
}
/**
* We received some payload. Prepare to pass it on to our clients.
*
* @param peer (claimed) identity of the other peer
* @param address the address
* @param session session used
* @param message the message to process
* @param ats performance information
* @param ats_count number of records in ats
* @return how long the plugin should wait until receiving more data
*/
static struct GNUNET_TIME_Relative
process_payload (const struct GNUNET_PeerIdentity *peer,
const struct GNUNET_HELLO_Address *address,
struct Session *session,
const struct GNUNET_MessageHeader *message,
const struct GNUNET_ATS_Information *ats, uint32_t ats_count)
{
struct GNUNET_TIME_Relative ret;
int do_forward;
struct InboundMessage *im;
size_t msg_size = ntohs (message->size);
size_t size =
sizeof (struct InboundMessage) + msg_size +
sizeof (struct GNUNET_ATS_Information) * (ats_count + 1);
char buf[size] GNUNET_ALIGN;
struct GNUNET_ATS_Information *ap;
ret = GNUNET_TIME_UNIT_ZERO;
do_forward = GNUNET_SYSERR;
ret = GST_neighbours_calculate_receive_delay (peer, msg_size, &do_forward);
if (!GST_neighbours_test_connected (peer))
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Discarded %u bytes type %u payload from peer `%s'\n", msg_size,
ntohs (message->type), GNUNET_i2s (peer));
GNUNET_STATISTICS_update (GST_stats,
gettext_noop
("# bytes payload discarded due to not connected peer "),
msg_size, GNUNET_NO);
return ret;
}
if (do_forward != GNUNET_YES)
return ret;
im = (struct InboundMessage *) buf;
im->header.size = htons (size);
im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
im->ats_count = htonl (ats_count + 1);
im->peer = *peer;
ap = (struct GNUNET_ATS_Information *) &im[1];
memcpy (ap, ats, ats_count * sizeof (struct GNUNET_ATS_Information));
ap[ats_count].type = htonl (GNUNET_ATS_QUALITY_NET_DELAY);
ap[ats_count].value =
htonl ((uint32_t) GST_neighbour_get_latency (peer).rel_value);
memcpy (&ap[ats_count + 1], message, ntohs (message->size));
GNUNET_ATS_address_update (GST_ats, address, session, ap, ats_count + 1);
GST_clients_broadcast (&im->header, GNUNET_YES);
return ret;
}
/**
* We received some payload. Prepare to pass it on to our clients.
*
* @param address address and (claimed) identity of the other peer
* @param session identifier used for this session (NULL for plugins
* that do not offer bi-directional communication to the sender
* using the same "connection")
* @param message the message to process
* @return how long the plugin should wait until receiving more data
*/
static struct GNUNET_TIME_Relative
process_payload (const struct GNUNET_HELLO_Address *address,
struct GNUNET_ATS_Session *session,
const struct GNUNET_MessageHeader *message)
{
struct GNUNET_TIME_Relative ret;
int do_forward;
struct InboundMessage *im;
size_t msg_size = ntohs (message->size);
size_t size = sizeof(struct InboundMessage) + msg_size;
char buf[size] GNUNET_ALIGN;
do_forward = GNUNET_SYSERR;
ret = GST_neighbours_calculate_receive_delay (&address->peer,
msg_size,
&do_forward);
if (! GST_neighbours_test_connected (&address->peer))
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Discarded %u bytes type %u payload from peer `%s'\n",
msg_size,
ntohs (message->type),
GNUNET_i2s (&address->peer));
GNUNET_STATISTICS_update (GST_stats, gettext_noop
("# bytes payload discarded due to not connected peer"),
msg_size,
GNUNET_NO);
return ret;
}
if (GNUNET_YES != do_forward)
return ret;
im = (struct InboundMessage *) buf;
im->header.size = htons (size);
im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
im->peer = address->peer;
memcpy (&im[1], message, ntohs (message->size));
GST_clients_broadcast (&im->header, GNUNET_YES);
return ret;
}
/**
* Client asked for transmission to a peer. Process the request.
*
* @param cls unused
* @param client the client
* @param message the send message that was sent
*/
static void
clients_handle_send (void *cls,
struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
const struct OutboundMessage *obm;
const struct GNUNET_MessageHeader *obmm;
struct SendTransmitContinuationContext *stcc;
uint16_t size;
uint16_t msize;
struct TransportClient *tc;
tc = lookup_client (client);
if (NULL == tc)
{
/* client asked for transmission before 'START' */
GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
size = ntohs (message->size);
if (size <
sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
{
GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
obm = (const struct OutboundMessage *) message;
obmm = (const struct GNUNET_MessageHeader *) &obm[1];
msize = size - sizeof (struct OutboundMessage);
if (msize < sizeof (struct GNUNET_MessageHeader))
{
GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received `%s' request from client with target `%4s' and first message of type %u and total size %u\n",
"SEND",
GNUNET_i2s (&obm->peer),
ntohs (obmm->type),
msize);
if (GNUNET_NO == GST_neighbours_test_connected (&obm->peer))
{
/* not connected, not allowed to send; can happen due to asynchronous operations */
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Could not send message to peer `%s': not connected\n",
GNUNET_i2s (&obm->peer));
GNUNET_STATISTICS_update (GST_stats,
gettext_noop
("# bytes payload dropped (other peer was not connected)"),
msize, GNUNET_NO);
GNUNET_SERVER_receive_done (client, GNUNET_OK);
return;
}
GNUNET_SERVER_receive_done (client, GNUNET_OK);
stcc = GNUNET_new (struct SendTransmitContinuationContext);
stcc->target = obm->peer;
stcc->client = client;
GNUNET_SERVER_client_keep (client);
GST_manipulation_send (&obm->peer, obmm, msize,
GNUNET_TIME_relative_ntoh (obm->timeout),
&handle_send_transmit_continuation, stcc);
}
