* Boston, MA 02111-1307, USA.
*/
-/**
+/**
* @file psyc/psyc_api.c
* @brief PSYC service; high-level access to the PSYC protocol
* note that clients of this API are NOT expected to
* @author Gabor X Toth
*/
+#include <inttypes.h>
+
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_env_lib.h"
+#include "gnunet_multicast_service.h"
#include "gnunet_psyc_service.h"
#include "psyc.h"
-/**
+#define LOG(kind,...) GNUNET_log_from (kind, "psyc-api",__VA_ARGS__)
+
+struct OperationHandle
+{
+ struct OperationHandle *prev;
+ struct OperationHandle *next;
+ struct GNUNET_MessageHeader *msg;
+};
+
+
+/**
+ * Handle for a pending PSYC transmission operation.
+ */
+struct GNUNET_PSYC_ChannelTransmitHandle
+{
+ struct GNUNET_PSYC_Channel *ch;
+ GNUNET_PSYC_TransmitNotifyModifier notify_mod;
+ GNUNET_PSYC_TransmitNotifyData notify_data;
+ void *notify_cls;
+ enum MessageState state;
+};
+
+/**
+ * Handle to access PSYC channel operations for both the master and slaves.
+ */
+struct GNUNET_PSYC_Channel
+{
+ /**
+ * Transmission handle;
+ */
+ struct GNUNET_PSYC_ChannelTransmitHandle tmit;
+
+ /**
+ * Configuration to use.
+ */
+ const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+ /**
+ * Socket (if available).
+ */
+ struct GNUNET_CLIENT_Connection *client;
+
+ /**
+ * Currently pending transmission request, or NULL for none.
+ */
+ struct GNUNET_CLIENT_TransmitHandle *th;
+
+ /**
+ * Head of operations to transmit.
+ */
+ struct OperationHandle *tmit_head;
+
+ /**
+ * Tail of operations to transmit.
+ */
+ struct OperationHandle *tmit_tail;
+
+ /**
+ * Message being transmitted to the PSYC service.
+ */
+ struct OperationHandle *tmit_msg;
+
+ /**
+ * Message to send on reconnect.
+ */
+ struct GNUNET_MessageHeader *reconnect_msg;
+
+ /**
+ * Task doing exponential back-off trying to reconnect.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
+
+ /**
+ * Time for next connect retry.
+ */
+ struct GNUNET_TIME_Relative reconnect_delay;
+
+ /**
+ * Message part callback.
+ */
+ GNUNET_PSYC_MessageCallback message_cb;
+
+ /**
+ * Message part callback for historic message.
+ */
+ GNUNET_PSYC_MessageCallback hist_message_cb;
+
+ /**
+ * Join handler callback.
+ */
+ GNUNET_PSYC_JoinCallback join_cb;
+
+ /**
+ * Closure for @a message_cb and @a join_cb.
+ */
+ void *cb_cls;
+
+ /**
+ * ID of the message being received from the PSYC service.
+ */
+ uint64_t recv_message_id;
+
+ /**
+ * Public key of the slave from which a message is being received.
+ */
+ struct GNUNET_CRYPTO_EddsaPublicKey recv_slave_key;
+
+ /**
+ * State of the currently being received message from the PSYC service.
+ */
+ enum MessageState recv_state;
+
+ /**
+ * Flags for the currently being received message from the PSYC service.
+ */
+ enum GNUNET_PSYC_MessageFlags recv_flags;
+
+ /**
+ * Expected value size for the modifier being received from the PSYC service.
+ */
+ uint32_t recv_mod_value_size_expected;
+
+ /**
+ * Actual value size for the modifier being received from the PSYC service.
+ */
+ uint32_t recv_mod_value_size;
+
+ /**
+ * Is transmission paused?
+ */
+ uint8_t tmit_paused;
+
+ /**
+ * Are we still waiting for a PSYC_TRANSMIT_ACK?
+ */
+ uint8_t tmit_ack_pending;
+
+ /**
+ * Are we polling for incoming messages right now?
+ */
+ uint8_t in_receive;
+
+ /**
+ * Are we currently transmitting a message?
+ */
+ uint8_t in_transmit;
+
+ /**
+ * Is this a master or slave channel?
+ */
+ uint8_t is_master;
+};
+
+
+/**
+ * Handle for the master of a PSYC channel.
+ */
+struct GNUNET_PSYC_Master
+{
+ struct GNUNET_PSYC_Channel ch;
+
+ GNUNET_PSYC_MasterStartCallback start_cb;
+
+ uint64_t max_message_id;
+};
+
+
+/**
+ * Handle for a PSYC channel slave.
+ */
+struct GNUNET_PSYC_Slave
+{
+ struct GNUNET_PSYC_Channel ch;
+
+ GNUNET_PSYC_SlaveJoinCallback join_cb;
+
+ uint64_t max_message_id;
+};
+
+
+/**
* Handle that identifies a join request.
*
* Used to match calls to #GNUNET_PSYC_JoinCallback to the
* corresponding calls to GNUNET_PSYC_join_decision().
*/
-struct GNUNET_PSYC_JoinHandle;
+struct GNUNET_PSYC_JoinHandle
+{
+};
-/**
- * Handle for the master of a PSYC channel.
+
+/**
+ * Handle for a pending PSYC transmission operation.
*/
-struct GNUNET_PSYC_Master;
+struct GNUNET_PSYC_SlaveTransmitHandle
+{
+};
-/**
- * Handle for a pending PSYC transmission operation.
+
+/**
+ * Handle to a story telling operation.
*/
-struct GNUNET_PSYC_MasterTransmitHandle;
+struct GNUNET_PSYC_Story
+{
+};
-/**
- * Handle for a PSYC channel slave.
+
+/**
+ * Handle for a state query operation.
*/
-struct GNUNET_PSYC_Slave;
+struct GNUNET_PSYC_StateQuery
+{
+};
-/**
- * Handle for a pending PSYC transmission operation.
+
+static void
+reconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
+
+
+static void
+channel_transmit_data (struct GNUNET_PSYC_Channel *ch);
+
+
+/**
+ * Reschedule a connect attempt to the service.
+ *
+ * @param c channel to reconnect
*/
-struct GNUNET_PSYC_SlaveTransmitHandle;
+static void
+reschedule_connect (struct GNUNET_PSYC_Channel *c)
+{
+ GNUNET_assert (c->reconnect_task == GNUNET_SCHEDULER_NO_TASK);
+ if (NULL != c->th)
+ {
+ GNUNET_CLIENT_notify_transmit_ready_cancel (c->th);
+ c->th = NULL;
+ }
+ if (NULL != c->client)
+ {
+ GNUNET_CLIENT_disconnect (c->client);
+ c->client = NULL;
+ }
+ c->in_receive = GNUNET_NO;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Scheduling task to reconnect to PSYC service in %s.\n",
+ GNUNET_STRINGS_relative_time_to_string (c->reconnect_delay, GNUNET_YES));
+ c->reconnect_task =
+ GNUNET_SCHEDULER_add_delayed (c->reconnect_delay, &reconnect, c);
+ c->reconnect_delay = GNUNET_TIME_STD_BACKOFF (c->reconnect_delay);
+}
-/**
- * Handle to access PSYC channel operations for both the master and slaves.
+
+/**
+ * Schedule transmission of the next message from our queue.
+ *
+ * @param ch PSYC channel handle
*/
-struct GNUNET_PSYC_Channel;
+static void
+transmit_next (struct GNUNET_PSYC_Channel *ch);
-/**
- * Handle to a story telling operation.
+/**
+ * Reset data stored related to the last received message.
*/
-struct GNUNET_PSYC_Story;
+static void
+recv_reset (struct GNUNET_PSYC_Channel *ch)
+{
+ ch->recv_state = MSG_STATE_START;
+ ch->recv_flags = 0;
+ ch->recv_message_id = 0;
+ //FIXME: ch->recv_slave_key = { 0 };
+ ch->recv_mod_value_size = 0;
+ ch->recv_mod_value_size_expected = 0;
+}
-struct GNUNET_PSYC_StateQuery;
+static void
+recv_error (struct GNUNET_PSYC_Channel *ch)
+{
+ GNUNET_PSYC_MessageCallback message_cb
+ = ch->recv_flags & GNUNET_PSYC_MESSAGE_HISTORIC
+ ? ch->hist_message_cb
+ : ch->message_cb;
+ if (NULL != message_cb)
+ message_cb (ch->cb_cls, ch->recv_message_id, ch->recv_flags, NULL);
-/**
- * Function to call with the decision made for a join request.
+ recv_reset (ch);
+}
+
+
+/**
+ * Queue a message part for transmission to the PSYC service.
*
- * Must be called once and only once in response to an invocation of the
- * #GNUNET_PSYC_JoinCallback.
+ * The message part is added to the current message buffer.
+ * When this buffer is full, it is added to the transmission queue.
*
- * @param jh Join request handle.
- * @param is_admitted #GNUNET_YES if joining is approved,
- * #GNUNET_NO if it is disapproved.
- * @param relay_count Number of relays given.
- * @param relays Array of suggested peers that might be useful relays to use
- * when joining the multicast group (essentially a list of peers that
- * are already part of the multicast group and might thus be willing
- * to help with routing). If empty, only this local peer (which must
- * be the multicast origin) is a good candidate for building the
- * multicast tree. Note that it is unnecessary to specify our own
- * peer identity in this array.
- * @param method_name Method name for the message transmitted with the response.
- * @param env Environment containing transient variables for the message, or NULL.
- * @param data Data of the message.
- * @param data_size Size of @a data.
+ * @param ch Channel struct for the client.
+ * @param msg Modifier message part, or NULL when there's no more modifiers.
+ * @param end End of message.
*/
-void
-GNUNET_PSYC_join_decision (struct GNUNET_PSYC_JoinHandle *jh,
- int is_admitted,
- unsigned int relay_count,
- const struct GNUNET_PeerIdentity *relays,
- const char *method_name,
- const struct GNUNET_ENV_Environment *env,
- const void *data,
- size_t data_size);
+static void
+queue_message (struct GNUNET_PSYC_Channel *ch,
+ const struct GNUNET_MessageHeader *msg,
+ uint8_t end)
+{
+ uint16_t size = msg ? ntohs (msg->size) : 0;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Queueing message of type %u and size %u (end: %u)).\n",
+ ntohs (msg->type), size, end);
+
+ struct OperationHandle *op = ch->tmit_msg;
+ if (NULL != op)
+ {
+ if (NULL == msg
+ || GNUNET_MULTICAST_FRAGMENT_MAX_PAYLOAD < op->msg->size + size)
+ {
+ /* End of message or buffer is full, add it to transmission queue
+ * and start with empty buffer */
+ op->msg->type = htons (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE);
+ op->msg->size = htons (op->msg->size);
+ GNUNET_CONTAINER_DLL_insert_tail (ch->tmit_head, ch->tmit_tail, op);
+ ch->tmit_msg = op = NULL;
+ ch->tmit_ack_pending++;
+ }
+ else
+ {
+ /* Message fits in current buffer, append */
+ ch->tmit_msg = op
+ = GNUNET_realloc (op, sizeof (*op) + op->msg->size + size);
+ op->msg = (struct GNUNET_MessageHeader *) &op[1];
+ memcpy ((char *) op->msg + op->msg->size, msg, size);
+ op->msg->size += size;
+ }
+ }
+
+ if (NULL == op && NULL != msg)
+ {
+ /* Empty buffer, copy over message. */
+ ch->tmit_msg = op
+ = GNUNET_malloc (sizeof (*op) + sizeof (*op->msg) + size);
+ op->msg = (struct GNUNET_MessageHeader *) &op[1];
+ op->msg->size = sizeof (*op->msg) + size;
+ memcpy (&op->msg[1], msg, size);
+ }
+
+ if (NULL != op
+ && (GNUNET_YES == end
+ || (GNUNET_MULTICAST_FRAGMENT_MAX_PAYLOAD
+ < op->msg->size + sizeof (struct GNUNET_MessageHeader))))
+ {
+ /* End of message or buffer is full, add it to transmission queue. */
+ op->msg->type = htons (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE);
+ op->msg->size = htons (op->msg->size);
+ GNUNET_CONTAINER_DLL_insert_tail (ch->tmit_head, ch->tmit_tail, op);
+ ch->tmit_msg = op = NULL;
+ ch->tmit_ack_pending++;
+ }
+
+ if (GNUNET_YES == end)
+ ch->in_transmit = GNUNET_NO;
+
+ transmit_next (ch);
+}
+
+
+/**
+ * Request a modifier from a client to transmit.
+ *
+ * @param mst Master handle.
+ */
+static void
+channel_transmit_mod (struct GNUNET_PSYC_Channel *ch)
+{
+ uint16_t max_data_size, data_size;
+ char data[GNUNET_MULTICAST_FRAGMENT_MAX_PAYLOAD] = "";
+ struct GNUNET_MessageHeader *msg = (struct GNUNET_MessageHeader *) data;
+ int notify_ret;
+
+ switch (ch->tmit.state)
+ {
+ case MSG_STATE_MODIFIER:
+ {
+ struct GNUNET_PSYC_MessageModifier *mod
+ = (struct GNUNET_PSYC_MessageModifier *) msg;
+ max_data_size = data_size = GNUNET_PSYC_MODIFIER_MAX_PAYLOAD;
+ msg->type = htons (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MODIFIER);
+ msg->size = sizeof (struct GNUNET_PSYC_MessageModifier);
+ notify_ret = ch->tmit.notify_mod (ch->tmit.notify_cls, &data_size, &mod[1],
+ &mod->oper, &mod->value_size);
+ mod->name_size = strnlen ((char *) &mod[1], data_size);
+ if (mod->name_size < data_size)
+ {
+ mod->value_size = htonl (mod->value_size);
+ mod->name_size = htons (mod->name_size);
+ }
+ else if (0 < data_size)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got invalid modifier name.\n");
+ notify_ret = GNUNET_SYSERR;
+ }
+ break;
+ }
+ case MSG_STATE_MOD_CONT:
+ {
+ max_data_size = data_size = GNUNET_PSYC_MOD_CONT_MAX_PAYLOAD;
+ msg->type = htons (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MOD_CONT);
+ msg->size = sizeof (struct GNUNET_MessageHeader);
+ notify_ret = ch->tmit.notify_mod (ch->tmit.notify_cls,
+ &data_size, &msg[1], NULL, NULL);
+ break;
+ }
+ default:
+ GNUNET_assert (0);
+ }
+ switch (notify_ret)
+ {
+ case GNUNET_NO:
+ if (0 == data_size)
+ { /* Transmission paused, nothing to send. */
+ ch->tmit_paused = GNUNET_YES;
+ return;
+ }
+ ch->tmit.state = MSG_STATE_MOD_CONT;
+ break;
+
+ case GNUNET_YES:
+ if (0 == data_size)
+ {
+ /* End of modifiers. */
+ ch->tmit.state = MSG_STATE_DATA;
+ if (0 == ch->tmit_ack_pending)
+ channel_transmit_data (ch);
+
+ return;
+ }
+ ch->tmit.state = MSG_STATE_MODIFIER;
+ break;
+
+ default:
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ "MasterTransmitNotifyModifier returned error "
+ "when requesting a modifier.\n");
+
+ ch->tmit.state = MSG_STATE_CANCEL;
+ msg->type = htons (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_CANCEL);
+ msg->size = htons (sizeof (*msg));
+
+ queue_message (ch, msg, GNUNET_YES);
+ return;
+ }
+
+ if (0 < data_size)
+ {
+ GNUNET_assert (data_size <= max_data_size);
+ msg->size = htons (msg->size + data_size);
+ queue_message (ch, msg, GNUNET_NO);
+ }
+
+ channel_transmit_mod (ch);
+}
+
+
+/**
+ * Request data from a client to transmit.
+ *
+ * @param mst Master handle.
+ */
+static void
+channel_transmit_data (struct GNUNET_PSYC_Channel *ch)
+{
+ uint16_t data_size = GNUNET_PSYC_DATA_MAX_PAYLOAD;
+ char data[GNUNET_MULTICAST_FRAGMENT_MAX_PAYLOAD] = "";
+ struct GNUNET_MessageHeader *msg = (struct GNUNET_MessageHeader *) data;
+
+ msg->type = htons (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_DATA);
+
+ int notify_ret = ch->tmit.notify_data (ch->tmit.notify_cls,
+ &data_size, &msg[1]);
+ switch (notify_ret)
+ {
+ case GNUNET_NO:
+ if (0 == data_size)
+ {
+ /* Transmission paused, nothing to send. */
+ ch->tmit_paused = GNUNET_YES;
+ return;
+ }
+ break;
+
+ case GNUNET_YES:
+ ch->tmit.state = MSG_STATE_END;
+ break;
+
+ default:
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ "MasterTransmitNotify returned error when requesting data.\n");
+
+ ch->tmit.state = MSG_STATE_CANCEL;
+ msg->type = htons (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_CANCEL);
+ msg->size = htons (sizeof (*msg));
+ queue_message (ch, msg, GNUNET_YES);
+ return;
+ }
+
+ if (0 < data_size)
+ {
+ GNUNET_assert (data_size <= GNUNET_PSYC_DATA_MAX_PAYLOAD);
+ msg->size = htons (sizeof (*msg) + data_size);
+ queue_message (ch, msg, !notify_ret);
+ }
+
+ /* End of message. */
+ if (GNUNET_YES == notify_ret)
+ {
+ msg->type = htons (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_END);
+ msg->size = htons (sizeof (*msg));
+ queue_message (ch, msg, GNUNET_YES);
+ }
+}
+
+
+/**
+ * Send a message to a channel.
+ *
+ * @param ch Handle to the PSYC channel.
+ * @param method_name Which method should be invoked.
+ * @param notify_mod Function to call to obtain modifiers.
+ * @param notify_data Function to call to obtain fragments of the data.
+ * @param notify_cls Closure for @a notify_mod and @a notify_data.
+ * @param flags Flags for the message being transmitted.
+ * @return Transmission handle, NULL on error (i.e. more than one request queued).
+ */
+static struct GNUNET_PSYC_ChannelTransmitHandle *
+channel_transmit (struct GNUNET_PSYC_Channel *ch,
+ const char *method_name,
+ GNUNET_PSYC_TransmitNotifyModifier notify_mod,
+ GNUNET_PSYC_TransmitNotifyData notify_data,
+ void *notify_cls,
+ uint32_t flags)
+{
+ if (GNUNET_NO != ch->in_transmit)
+ return NULL;
+ ch->in_transmit = GNUNET_YES;
+
+ size_t size = strlen (method_name) + 1;
+ struct GNUNET_PSYC_MessageMethod *pmeth;
+ struct OperationHandle *op;
+
+ ch->tmit_msg = op = GNUNET_malloc (sizeof (*op) + sizeof (*op->msg)
+ + sizeof (*pmeth) + size);
+ op->msg = (struct GNUNET_MessageHeader *) &op[1];
+ op->msg->size = sizeof (*op->msg) + sizeof (*pmeth) + size;
+
+ pmeth = (struct GNUNET_PSYC_MessageMethod *) &op->msg[1];
+ pmeth->header.type = htons (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_METHOD);
+ pmeth->header.size = htons (sizeof (*pmeth) + size);
+ pmeth->flags = htonl (flags);
+ memcpy (&pmeth[1], method_name, size);
+
+ ch->tmit.ch = ch;
+ ch->tmit.notify_mod = notify_mod;
+ ch->tmit.notify_data = notify_data;
+ ch->tmit.notify_cls = notify_cls;
+ ch->tmit.state = MSG_STATE_MODIFIER;
+
+ channel_transmit_mod (ch);
+ return &ch->tmit;
+}
+
+
+/**
+ * Resume transmission to the channel.
+ *
+ * @param th Handle of the request that is being resumed.
+ */
+static void
+channel_transmit_resume (struct GNUNET_PSYC_ChannelTransmitHandle *th)
+{
+ struct GNUNET_PSYC_Channel *ch = th->ch;
+ if (0 == ch->tmit_ack_pending)
+ {
+ ch->tmit_paused = GNUNET_NO;
+ channel_transmit_data (ch);
+ }
+}
-/**
+
+/**
+ * Abort transmission request to channel.
+ *
+ * @param th Handle of the request that is being aborted.
+ */
+static void
+channel_transmit_cancel (struct GNUNET_PSYC_ChannelTransmitHandle *th)
+{
+ struct GNUNET_PSYC_Channel *ch = th->ch;
+ if (GNUNET_NO == ch->in_transmit)
+ return;
+}
+
+
+/**
+ * Handle incoming message from the PSYC service.
+ *
+ * @param ch The channel the message is sent to.
+ * @param pmsg The message.
+ */
+static void
+handle_psyc_message (struct GNUNET_PSYC_Channel *ch,
+ const struct GNUNET_PSYC_MessageHeader *msg)
+{
+ uint16_t size = ntohs (msg->header.size);
+ uint32_t flags = ntohl (msg->flags);
+
+ GNUNET_PSYC_log_message (GNUNET_ERROR_TYPE_DEBUG,
+ (struct GNUNET_MessageHeader *) msg);
+
+ if (MSG_STATE_START == ch->recv_state)
+ {
+ ch->recv_message_id = GNUNET_ntohll (msg->message_id);
+ ch->recv_flags = flags;
+ ch->recv_slave_key = msg->slave_key;
+ ch->recv_mod_value_size = 0;
+ ch->recv_mod_value_size_expected = 0;
+ }
+ else if (GNUNET_ntohll (msg->message_id) != ch->recv_message_id)
+ {
+ // FIXME
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Unexpected message ID. Got: %" PRIu64 ", expected: %" PRIu64 "\n",
+ GNUNET_ntohll (msg->message_id), ch->recv_message_id);
+ GNUNET_break_op (0);
+ recv_error (ch);
+ return;
+ }
+ else if (flags != ch->recv_flags)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Unexpected message flags. Got: %lu, expected: %lu\n",
+ flags, ch->recv_flags);
+ GNUNET_break_op (0);
+ recv_error (ch);
+ return;
+ }
+
+ uint16_t pos = 0, psize = 0, ptype, size_eq, size_min;
+
+ for (pos = 0; sizeof (*msg) + pos < size; pos += psize)
+ {
+ const struct GNUNET_MessageHeader *pmsg
+ = (const struct GNUNET_MessageHeader *) ((char *) &msg[1] + pos);
+ psize = ntohs (pmsg->size);
+ ptype = ntohs (pmsg->type);
+ size_eq = size_min = 0;
+
+ if (psize < sizeof (*pmsg) || sizeof (*msg) + pos + psize > size)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "Dropping message of type %u with invalid size %u.\n",
+ ptype, psize);
+ recv_error (ch);
+ return;
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received message part from PSYC.\n");
+ GNUNET_PSYC_log_message (GNUNET_ERROR_TYPE_DEBUG, pmsg);
+
+ switch (ptype)
+ {
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_METHOD:
+ size_min = sizeof (struct GNUNET_PSYC_MessageMethod);
+ break;
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MODIFIER:
+ size_min = sizeof (struct GNUNET_PSYC_MessageModifier);
+ break;
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MOD_CONT:
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_DATA:
+ size_min = sizeof (struct GNUNET_MessageHeader);
+ break;
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_END:
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_CANCEL:
+ size_eq = sizeof (struct GNUNET_MessageHeader);
+ break;
+ default:
+ GNUNET_break_op (0);
+ recv_error (ch);
+ return;
+ }
+
+ if (! ((0 < size_eq && psize == size_eq)
+ || (0 < size_min && size_min <= psize)))
+ {
+ GNUNET_break_op (0);
+ recv_error (ch);
+ return;
+ }
+
+ switch (ptype)
+ {
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_METHOD:
+ {
+ struct GNUNET_PSYC_MessageMethod *meth
+ = (struct GNUNET_PSYC_MessageMethod *) pmsg;
+
+ if (MSG_STATE_START != ch->recv_state)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Dropping out of order message method (%u).\n",
+ ch->recv_state);
+ /* It is normal to receive an incomplete message right after connecting,
+ * but should not happen later.
+ * FIXME: add a check for this condition.
+ */
+ GNUNET_break_op (0);
+ recv_error (ch);
+ return;
+ }
+
+ if ('\0' != *((char *) meth + psize - 1))
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Dropping message with malformed method. "
+ "Message ID: %" PRIu64 "\n", ch->recv_message_id);
+ GNUNET_break_op (0);
+ recv_error (ch);
+ return;
+ }
+ ch->recv_state = MSG_STATE_METHOD;
+ break;
+ }
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MODIFIER:
+ {
+ if (!(MSG_STATE_METHOD == ch->recv_state
+ || MSG_STATE_MODIFIER == ch->recv_state
+ || MSG_STATE_MOD_CONT == ch->recv_state))
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Dropping out of order message modifier (%u).\n",
+ ch->recv_state);
+ GNUNET_break_op (0);
+ recv_error (ch);
+ return;
+ }
+
+ struct GNUNET_PSYC_MessageModifier *mod
+ = (struct GNUNET_PSYC_MessageModifier *) pmsg;
+
+ uint16_t name_size = ntohs (mod->name_size);
+ ch->recv_mod_value_size_expected = ntohl (mod->value_size);
+ ch->recv_mod_value_size = psize - sizeof (*mod) - name_size - 1;
+
+ if (psize < sizeof (*mod) + name_size + 1
+ || '\0' != *((char *) &mod[1] + name_size)
+ || ch->recv_mod_value_size_expected < ch->recv_mod_value_size)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING, "Dropping malformed modifier.\n");
+ GNUNET_break_op (0);
+ recv_error (ch);
+ return;
+ }
+ ch->recv_state = MSG_STATE_MODIFIER;
+ break;
+ }
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MOD_CONT:
+ {
+ ch->recv_mod_value_size += psize - sizeof (*pmsg);
+
+ if (!(MSG_STATE_MODIFIER == ch->recv_state
+ || MSG_STATE_MOD_CONT == ch->recv_state)
+ || ch->recv_mod_value_size_expected < ch->recv_mod_value_size)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Dropping out of order message modifier continuation "
+ "!(%u == %u || %u == %u) || %lu < %lu.\n",
+ MSG_STATE_MODIFIER, ch->recv_state,
+ MSG_STATE_MOD_CONT, ch->recv_state,
+ ch->recv_mod_value_size_expected, ch->recv_mod_value_size);
+ GNUNET_break_op (0);
+ recv_error (ch);
+ return;
+ }
+ break;
+ }
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_DATA:
+ {
+ if (ch->recv_state < MSG_STATE_METHOD
+ || ch->recv_mod_value_size_expected != ch->recv_mod_value_size)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Dropping out of order message data fragment "
+ "(%u < %u || %lu != %lu).\n",
+ ch->recv_state, MSG_STATE_METHOD,
+ ch->recv_mod_value_size_expected, ch->recv_mod_value_size);
+
+ GNUNET_break_op (0);
+ recv_error (ch);
+ return;
+ }
+ ch->recv_state = MSG_STATE_DATA;
+ break;
+ }
+ }
+
+ GNUNET_PSYC_MessageCallback message_cb
+ = ch->recv_flags & GNUNET_PSYC_MESSAGE_HISTORIC
+ ? ch->hist_message_cb
+ : ch->message_cb;
+
+ if (NULL != message_cb)
+ message_cb (ch->cb_cls, ch->recv_message_id, ch->recv_flags, pmsg);
+
+ switch (ptype)
+ {
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_END:
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_CANCEL:
+ recv_reset (ch);
+ break;
+ }
+ }
+}
+
+
+/**
+ * Handle incoming message acknowledgement from the PSYC service.
+ *
+ * @param ch The channel the acknowledgement is sent to.
+ */
+static void
+handle_psyc_message_ack (struct GNUNET_PSYC_Channel *ch)
+{
+ if (0 == ch->tmit_ack_pending)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING, "Ignoring extraneous message ACK\n");
+ GNUNET_break (0);
+ return;
+ }
+ ch->tmit_ack_pending--;
+
+ switch (ch->tmit.state)
+ {
+ case MSG_STATE_MODIFIER:
+ case MSG_STATE_MOD_CONT:
+ if (GNUNET_NO == ch->tmit_paused)
+ channel_transmit_mod (ch);
+ break;
+
+ case MSG_STATE_DATA:
+ if (GNUNET_NO == ch->tmit_paused)
+ channel_transmit_data (ch);
+ break;
+
+ case MSG_STATE_END:
+ case MSG_STATE_CANCEL:
+ break;
+
+ default:
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Ignoring message ACK in state %u.\n", ch->tmit.state);
+ }
+}
+
+
+/**
+ * Type of a function to call when we receive a message
+ * from the service.
+ *
+ * @param cls closure
+ * @param msg message received, NULL on timeout or fatal error
+ */
+static void
+message_handler (void *cls,
+ const struct GNUNET_MessageHeader *msg)
+{
+ // YUCK! => please have disjoint message handlers...
+ struct GNUNET_PSYC_Channel *ch = cls;
+ struct GNUNET_PSYC_Master *mst = cls;
+ struct GNUNET_PSYC_Slave *slv = cls;
+
+ if (NULL == msg)
+ {
+ // timeout / disconnected from server, reconnect
+ reschedule_connect (ch);
+ return;
+ }
+ uint16_t size_eq = 0;
+ uint16_t size_min = 0;
+ uint16_t size = ntohs (msg->size);
+ uint16_t type = ntohs (msg->type);
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Received message of type %d and size %u from PSYC service\n",
+ type, size);
+
+ switch (type)
+ {
+ case GNUNET_MESSAGE_TYPE_PSYC_MASTER_START_ACK:
+ case GNUNET_MESSAGE_TYPE_PSYC_SLAVE_JOIN_ACK:
+ size_eq = sizeof (struct CountersResult);
+ break;
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE:
+ size_min = sizeof (struct GNUNET_PSYC_MessageHeader);
+ break;
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_ACK:
+ size_eq = sizeof (struct GNUNET_MessageHeader);
+ break;
+ default:
+ GNUNET_break_op (0);
+ return;
+ }
+
+ if (! ((0 < size_eq && size == size_eq)
+ || (0 < size_min && size_min <= size)))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+
+ switch (type)
+ {
+ case GNUNET_MESSAGE_TYPE_PSYC_MASTER_START_ACK:
+ {
+ struct CountersResult *cres = (struct CountersResult *) msg;
+ mst->max_message_id = GNUNET_ntohll (cres->max_message_id);
+ if (NULL != mst->start_cb)
+ mst->start_cb (ch->cb_cls, mst->max_message_id);
+ break;
+ }
+ case GNUNET_MESSAGE_TYPE_PSYC_SLAVE_JOIN_ACK:
+ {
+ struct CountersResult *cres = (struct CountersResult *) msg;
+ slv->max_message_id = GNUNET_ntohll (cres->max_message_id);
+ if (NULL != slv->join_cb)
+ slv->join_cb (ch->cb_cls, slv->max_message_id);
+ break;
+ }
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_ACK:
+ {
+ handle_psyc_message_ack (ch);
+ break;
+ }
+
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE:
+ handle_psyc_message (ch, (const struct GNUNET_PSYC_MessageHeader *) msg);
+ break;
+ }
+
+ if (NULL != ch->client)
+ {
+ GNUNET_CLIENT_receive (ch->client, &message_handler, ch,
+ GNUNET_TIME_UNIT_FOREVER_REL);
+ }
+}
+
+
+/**
+ * Transmit next message to service.
+ *
+ * @param cls The 'struct GNUNET_PSYC_Channel'.
+ * @param size Number of bytes available in buf.
+ * @param buf Where to copy the message.
+ * @return Number of bytes copied to buf.
+ */
+static size_t
+send_next_message (void *cls, size_t size, void *buf)
+{
+ struct GNUNET_PSYC_Channel *ch = cls;
+ struct OperationHandle *op = ch->tmit_head;
+ size_t ret;
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "send_next_message()\n");
+ ch->th = NULL;
+ if (NULL == op->msg)
+ return 0;
+ ret = ntohs (op->msg->size);
+ if (ret > size)
+ {
+ reschedule_connect (ch);
+ return 0;
+ }
+ memcpy (buf, op->msg, ret);
+
+ GNUNET_CONTAINER_DLL_remove (ch->tmit_head, ch->tmit_tail, op);
+ GNUNET_free (op);
+
+ if (NULL != ch->tmit_head)
+ transmit_next (ch);
+
+ if (GNUNET_NO == ch->in_receive)
+ {
+ ch->in_receive = GNUNET_YES;
+ GNUNET_CLIENT_receive (ch->client, &message_handler, ch,
+ GNUNET_TIME_UNIT_FOREVER_REL);
+ }
+ return ret;
+}
+
+
+/**
+ * Schedule transmission of the next message from our queue.
+ *
+ * @param ch PSYC handle.
+ */
+static void
+transmit_next (struct GNUNET_PSYC_Channel *ch)
+{
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "transmit_next()\n");
+ if (NULL != ch->th || NULL == ch->client)
+ return;
+
+ struct OperationHandle *op = ch->tmit_head;
+ if (NULL == op)
+ return;
+
+ ch->th = GNUNET_CLIENT_notify_transmit_ready (ch->client,
+ ntohs (op->msg->size),
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ GNUNET_NO,
+ &send_next_message,
+ ch);
+}
+
+
+/**
+ * Try again to connect to the PSYC service.
+ *
+ * @param cls Channel handle.
+ * @param tc Scheduler context.
+ */
+static void
+reconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_PSYC_Channel *ch = cls;
+
+ recv_reset (ch);
+ ch->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Connecting to PSYC service.\n");
+ GNUNET_assert (NULL == ch->client);
+ ch->client = GNUNET_CLIENT_connect ("psyc", ch->cfg);
+ GNUNET_assert (NULL != ch->client);
+
+ if (NULL == ch->tmit_head ||
+ ch->tmit_head->msg->type != ch->reconnect_msg->type)
+ {
+ uint16_t reconn_size = ntohs (ch->reconnect_msg->size);
+ struct OperationHandle *op = GNUNET_malloc (sizeof (*op) + reconn_size);
+ memcpy (&op[1], ch->reconnect_msg, reconn_size);
+ op->msg = (struct GNUNET_MessageHeader *) &op[1];
+ GNUNET_CONTAINER_DLL_insert (ch->tmit_head, ch->tmit_tail, op);
+ }
+ transmit_next (ch);
+}
+
+
+/**
+ * Disconnect from the PSYC service.
+ *
+ * @param c Channel handle to disconnect
+ */
+static void
+disconnect (void *c)
+{
+ struct GNUNET_PSYC_Channel *ch = c;
+
+ GNUNET_assert (NULL != ch);
+ if (ch->tmit_head != ch->tmit_tail)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ "Disconnecting while there are still outstanding messages!\n");
+ GNUNET_break (0);
+ }
+ if (ch->reconnect_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (ch->reconnect_task);
+ ch->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (NULL != ch->th)
+ {
+ GNUNET_CLIENT_notify_transmit_ready_cancel (ch->th);
+ ch->th = NULL;
+ }
+ if (NULL != ch->client)
+ {
+ GNUNET_CLIENT_disconnect (ch->client);
+ ch->client = NULL;
+ }
+ if (NULL != ch->reconnect_msg)
+ {
+ GNUNET_free (ch->reconnect_msg);
+ ch->reconnect_msg = NULL;
+ }
+}
+
+
+/**
* Start a PSYC master channel.
*
* Will start a multicast group identified by the given ECC key. Messages
* @param channel_key ECC key that will be used to sign messages for this
* PSYC session. The public key is used to identify the PSYC channel.
* Note that end-users will usually not use the private key directly, but
- * rather look it up in GADS for places managed by other users, or select
+ * rather look it up in GNS for places managed by other users, or select
* a file with the private key(s) when setting up their own channels
* FIXME: we'll likely want to use NOT the p521 curve here, but a cheaper
* one in the future.
* @param policy Channel policy specifying join and history restrictions.
* Used to automate join decisions.
- * @param method Function to invoke on messages received from slaves.
+ * @param message_cb Function to invoke on message parts received from slaves.
* @param join_cb Function to invoke when a peer wants to join.
- * @param cls Closure for @a method and @a join_cb.
+ * @param master_started_cb Function to invoke after the channel master started.
+ * @param cls Closure for @a master_started_cb and @a join_cb.
* @return Handle for the channel master, NULL on error.
*/
struct GNUNET_PSYC_Master *
GNUNET_PSYC_master_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
- const struct GNUNET_CRYPTO_EccPrivateKey *channel_key,
+ const struct GNUNET_CRYPTO_EddsaPrivateKey *channel_key,
enum GNUNET_PSYC_Policy policy,
- GNUNET_PSYC_Method method,
+ GNUNET_PSYC_MessageCallback message_cb,
GNUNET_PSYC_JoinCallback join_cb,
- void *cls);
+ GNUNET_PSYC_MasterStartCallback master_started_cb,
+ void *cls)
+{
+ struct GNUNET_PSYC_Master *mst = GNUNET_malloc (sizeof (*mst));
+ struct GNUNET_PSYC_Channel *ch = &mst->ch;
+ struct MasterStartRequest *req = GNUNET_malloc (sizeof (*req));
+
+ req->header.size = htons (sizeof (*req));
+ req->header.type = htons (GNUNET_MESSAGE_TYPE_PSYC_MASTER_START);
+ req->channel_key = *channel_key;
+ req->policy = policy;
+
+ ch->cfg = cfg;
+ ch->is_master = GNUNET_YES;
+ ch->reconnect_msg = (struct GNUNET_MessageHeader *) req;
+ ch->reconnect_delay = GNUNET_TIME_UNIT_ZERO;
+ ch->reconnect_task = GNUNET_SCHEDULER_add_now (&reconnect, mst);
+
+ ch->message_cb = message_cb;
+ ch->join_cb = join_cb;
+ ch->cb_cls = cls;
+ mst->start_cb = master_started_cb;
+
+ return mst;
+}
+
+
+/**
+ * Stop a PSYC master channel.
+ *
+ * @param master PSYC channel master to stop.
+ */
+void
+GNUNET_PSYC_master_stop (struct GNUNET_PSYC_Master *master)
+{
+ disconnect (master);
+ GNUNET_free (master);
+}
+
+
+/**
+ * Function to call with the decision made for a join request.
+ *
+ * Must be called once and only once in response to an invocation of the
+ * #GNUNET_PSYC_JoinCallback.
+ *
+ * @param jh Join request handle.
+ * @param is_admitted #GNUNET_YES if joining is approved,
+ * #GNUNET_NO if it is disapproved.
+ * @param relay_count Number of relays given.
+ * @param relays Array of suggested peers that might be useful relays to use
+ * when joining the multicast group (essentially a list of peers that
+ * are already part of the multicast group and might thus be willing
+ * to help with routing). If empty, only this local peer (which must
+ * be the multicast origin) is a good candidate for building the
+ * multicast tree. Note that it is unnecessary to specify our own
+ * peer identity in this array.
+ * @param method_name Method name for the message transmitted with the response.
+ * @param env Environment containing transient variables for the message, or NULL.
+ * @param data Data of the message.
+ * @param data_size Size of @a data.
+ */
+void
+GNUNET_PSYC_join_decision (struct GNUNET_PSYC_JoinHandle *jh,
+ int is_admitted,
+ uint32_t relay_count,
+ const struct GNUNET_PeerIdentity *relays,
+ const char *method_name,
+ const struct GNUNET_ENV_Environment *env,
+ const void *data,
+ size_t data_size)
+{
+}
-/**
+
+/**
* Send a message to call a method to all members in the PSYC channel.
*
* @param master Handle to the PSYC channel.
* @param method_name Which method should be invoked.
- * @param env Environment containing state operations and transient variables
- * for the message, or NULL.
- * @param notify Function to call to obtain the arguments.
- * @param notify_cls Closure for @a notify.
+ * @param notify_mod Function to call to obtain modifiers.
+ * @param notify_data Function to call to obtain fragments of the data.
+ * @param notify_cls Closure for @a notify_mod and @a notify_data.
* @param flags Flags for the message being transmitted.
* @return Transmission handle, NULL on error (i.e. more than one request queued).
*/
struct GNUNET_PSYC_MasterTransmitHandle *
GNUNET_PSYC_master_transmit (struct GNUNET_PSYC_Master *master,
const char *method_name,
- const struct GNUNET_ENV_Environment *env,
- GNUNET_PSYC_MasterTransmitNotify notify,
+ GNUNET_PSYC_TransmitNotifyModifier notify_mod,
+ GNUNET_PSYC_TransmitNotifyData notify_data,
void *notify_cls,
- enum GNUNET_PSYC_MasterTransmitFlags flags);
+ enum GNUNET_PSYC_MasterTransmitFlags flags)
+{
+ return (struct GNUNET_PSYC_MasterTransmitHandle *)
+ channel_transmit (&master->ch, method_name, notify_mod, notify_data,
+ notify_cls, flags);
+}
-/**
- * Abort transmission request to channel.
+/**
+ * Resume transmission to the channel.
*
- * @param th Handle of the request that is being aborted.
+ * @param th Handle of the request that is being resumed.
*/
void
-GNUNET_PSYC_master_transmit_cancel (struct GNUNET_PSYC_MasterTransmitHandle *th);
+GNUNET_PSYC_master_transmit_resume (struct GNUNET_PSYC_MasterTransmitHandle *th)
+{
+ channel_transmit_resume ((struct GNUNET_PSYC_ChannelTransmitHandle *) th);
+}
-/**
- * Stop a PSYC master channel.
+/**
+ * Abort transmission request to the channel.
*
- * @param master PSYC channel master to stop.
+ * @param th Handle of the request that is being aborted.
*/
void
-GNUNET_PSYC_master_stop (struct GNUNET_PSYC_Master *master);
+GNUNET_PSYC_master_transmit_cancel (struct GNUNET_PSYC_MasterTransmitHandle *th)
+{
+ channel_transmit_cancel ((struct GNUNET_PSYC_ChannelTransmitHandle *) th);
+}
-/**
+/**
* Join a PSYC channel.
*
* The entity joining is always the local peer. The user must immediately use
- * the GNUNET_PSYC_slave_to_master() functions to transmit a @e join_msg to the
+ * the GNUNET_PSYC_slave_transmit() functions to transmit a @e join_msg to the
* channel; if the join request succeeds, the channel state (and @e recent
* method calls) will be replayed to the joining member. There is no explicit
* notification on failure (as the channel may simply take days to approve,
* @param relay_count Number of peers in the @a relays array.
* @param relays Peer identities of members of the multicast group, which serve
* as relays and used to join the group at.
- * @param method Function to invoke on messages received from the channel,
- * typically at least contains functions for @e join and @e part.
- * @param join_cb Function to invoke when a peer wants to join.
- * @param cls Closure for @a method_cb and @a join_cb.
+ * @param message_cb Function to invoke on message parts received from the
+ * channel, typically at least contains method handlers for @e join and
+ * @e part.
+ * @param join_cb function invoked once we have joined with the current
+ * message ID of the channel
+ * @param slave_joined_cb Function to invoke when a peer wants to join.
+ * @param cls Closure for @a message_cb and @a slave_joined_cb.
* @param method_name Method name for the join request.
* @param env Environment containing transient variables for the request, or NULL.
* @param data Payload for the join message.
*/
struct GNUNET_PSYC_Slave *
GNUNET_PSYC_slave_join (const struct GNUNET_CONFIGURATION_Handle *cfg,
- const struct GNUNET_CRYPTO_EccPublicSignKey *channel_key,
- const struct GNUNET_CRYPTO_EccPrivateKey *slave_key,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *channel_key,
+ const struct GNUNET_CRYPTO_EddsaPrivateKey *slave_key,
const struct GNUNET_PeerIdentity *origin,
- size_t relay_count,
+ uint32_t relay_count,
const struct GNUNET_PeerIdentity *relays,
- GNUNET_PSYC_Method method,
+ GNUNET_PSYC_MessageCallback message_cb,
GNUNET_PSYC_JoinCallback join_cb,
+ GNUNET_PSYC_SlaveJoinCallback slave_joined_cb,
void *cls,
const char *method_name,
const struct GNUNET_ENV_Environment *env,
const void *data,
- size_t data_size);
+ uint16_t data_size)
+{
+ struct GNUNET_PSYC_Slave *slv = GNUNET_malloc (sizeof (*slv));
+ struct GNUNET_PSYC_Channel *ch = &slv->ch;
+ struct SlaveJoinRequest *req
+ = GNUNET_malloc (sizeof (*req) + relay_count * sizeof (*relays));
+ req->header.size = htons (sizeof (*req)
+ + relay_count * sizeof (*relays));
+ req->header.type = htons (GNUNET_MESSAGE_TYPE_PSYC_SLAVE_JOIN);
+ req->channel_key = *channel_key;
+ req->slave_key = *slave_key;
+ req->origin = *origin;
+ req->relay_count = htonl (relay_count);
+ memcpy (&req[1], relays, relay_count * sizeof (*relays));
+
+ ch->message_cb = message_cb;
+ ch->join_cb = join_cb;
+ ch->cb_cls = cls;
+
+ ch->cfg = cfg;
+ ch->is_master = GNUNET_NO;
+ ch->reconnect_msg = (struct GNUNET_MessageHeader *) req;
+ ch->reconnect_delay = GNUNET_TIME_UNIT_ZERO;
+ ch->reconnect_task = GNUNET_SCHEDULER_add_now (&reconnect, slv);
+
+ slv->join_cb = slave_joined_cb;
+ return slv;
+}
-/**
+/**
* Part a PSYC channel.
*
* Will terminate the connection to the PSYC service. Polite clients should
- * first explicitly send a @e part request (via GNUNET_PSYC_slave_to_master()).
+ * first explicitly send a part request (via GNUNET_PSYC_slave_transmit()).
*
* @param slave Slave handle.
*/
void
-GNUNET_PSYC_slave_part (struct GNUNET_PSYC_Slave *slave);
+GNUNET_PSYC_slave_part (struct GNUNET_PSYC_Slave *slave)
+{
+ disconnect (slave);
+ GNUNET_free (slave);
+}
-/**
+/**
* Request a message to be sent to the channel master.
*
* @param slave Slave handle.
* @param method_name Which (PSYC) method should be invoked (on host).
- * @param env Environment containing transient variables for the message, or NULL.
- * @param notify Function to call when we are allowed to transmit (to get data).
+ * @param notify_mod Function to call to obtain modifiers.
+ * @param notify_data Function to call to obtain fragments of the data.
* @param notify_cls Closure for @a notify.
* @param flags Flags for the message being transmitted.
- * @return Transmission handle, NULL on error (i.e. more than one request queued).
+ * @return Transmission handle, NULL on error (i.e. more than one request
+ * queued).
*/
struct GNUNET_PSYC_SlaveTransmitHandle *
GNUNET_PSYC_slave_transmit (struct GNUNET_PSYC_Slave *slave,
const char *method_name,
- const struct GNUNET_ENV_Environment *env,
- GNUNET_PSYC_SlaveTransmitNotify notify,
+ GNUNET_PSYC_TransmitNotifyModifier notify_mod,
+ GNUNET_PSYC_TransmitNotifyData notify_data,
void *notify_cls,
- enum GNUNET_PSYC_SlaveTransmitFlags flags);
+ enum GNUNET_PSYC_SlaveTransmitFlags flags)
+{
+ return (struct GNUNET_PSYC_SlaveTransmitHandle *)
+ channel_transmit (&slave->ch, method_name,
+ notify_mod, notify_data, notify_cls, flags);
+}
-/**
+/**
+ * Resume transmission to the master.
+ *
+ * @param th Handle of the request that is being resumed.
+ */
+void
+GNUNET_PSYC_slave_transmit_resume (struct GNUNET_PSYC_SlaveTransmitHandle *th)
+{
+ channel_transmit_resume ((struct GNUNET_PSYC_ChannelTransmitHandle *) th);
+}
+
+
+/**
* Abort transmission request to master.
*
* @param th Handle of the request that is being aborted.
*/
void
-GNUNET_PSYC_slave_transmit_cancel (struct GNUNET_PSYC_SlaveTransmitHandle *th);
+GNUNET_PSYC_slave_transmit_cancel (struct GNUNET_PSYC_SlaveTransmitHandle *th)
+{
+ channel_transmit_cancel ((struct GNUNET_PSYC_ChannelTransmitHandle *) th);
+}
-/**
- * Convert a channel @a master to a @e channel handle to access the @e channel APIs.
+/**
+ * Convert a channel @a master to a @e channel handle to access the @e channel
+ * APIs.
*
* @param master Channel master handle.
* @return Channel handle, valid for as long as @a master is valid.
*/
struct GNUNET_PSYC_Channel *
-GNUNET_PSYC_master_get_channel (struct GNUNET_PSYC_Master *master);
+GNUNET_PSYC_master_get_channel (struct GNUNET_PSYC_Master *master)
+{
+ return &master->ch;
+}
-/**
+/**
* Convert @a slave to a @e channel handle to access the @e channel APIs.
*
* @param slave Slave handle.
* @return Channel handle, valid for as long as @a slave is valid.
*/
struct GNUNET_PSYC_Channel *
-GNUNET_PSYC_slave_get_channel (struct GNUNET_PSYC_Slave *slave);
+GNUNET_PSYC_slave_get_channel (struct GNUNET_PSYC_Slave *slave)
+{
+ return &slave->ch;
+}
-/**
+/**
* Add a slave to the channel's membership list.
*
* Note that this will NOT generate any PSYC traffic, it will merely update the
*/
void
GNUNET_PSYC_channel_slave_add (struct GNUNET_PSYC_Channel *channel,
- const struct GNUNET_CRYPTO_EccPublicSignKey *slave_key,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *slave_key,
uint64_t announced_at,
- uint64_t effective_since);
+ uint64_t effective_since)
+{
+ struct ChannelSlaveAdd *slvadd;
+ struct OperationHandle *op = GNUNET_malloc (sizeof (*op) + sizeof (*slvadd));
+
+ slvadd = (struct ChannelSlaveAdd *) &op[1];
+ op->msg = (struct GNUNET_MessageHeader *) slvadd;
+ slvadd->header.type = GNUNET_MESSAGE_TYPE_PSYC_CHANNEL_SLAVE_ADD;
+ slvadd->header.size = htons (sizeof (*slvadd));
+ slvadd->announced_at = GNUNET_htonll (announced_at);
+ slvadd->effective_since = GNUNET_htonll (effective_since);
+ GNUNET_CONTAINER_DLL_insert_tail (channel->tmit_head,
+ channel->tmit_tail,
+ op);
+ transmit_next (channel);
+}
-/**
+
+/**
* Remove a slave from the channel's membership list.
*
* Note that this will NOT generate any PSYC traffic, it will merely update the
*/
void
GNUNET_PSYC_channel_slave_remove (struct GNUNET_PSYC_Channel *channel,
- const struct GNUNET_CRYPTO_EccPublicSignKey *slave_key,
- uint64_t announced_at);
+ const struct GNUNET_CRYPTO_EddsaPublicKey *slave_key,
+ uint64_t announced_at)
+{
+ struct ChannelSlaveRemove *slvrm;
+ struct OperationHandle *op = GNUNET_malloc (sizeof (*op) + sizeof (*slvrm));
+
+ slvrm = (struct ChannelSlaveRemove *) &op[1];
+ op->msg = (struct GNUNET_MessageHeader *) slvrm;
+ slvrm->header.type = GNUNET_MESSAGE_TYPE_PSYC_CHANNEL_SLAVE_RM;
+ slvrm->header.size = htons (sizeof (*slvrm));
+ slvrm->announced_at = GNUNET_htonll (announced_at);
+ GNUNET_CONTAINER_DLL_insert_tail (channel->tmit_head,
+ channel->tmit_tail,
+ op);
+ transmit_next (channel);
+}
-/**
+/**
* Request to be told the message history of the channel.
*
* Historic messages (but NOT the state at the time) will be replayed (given to
* @param channel Which channel should be replayed?
* @param start_message_id Earliest interesting point in history.
* @param end_message_id Last (exclusive) interesting point in history.
- * @param method Function to invoke on messages received from the story.
+ * @param message_cb Function to invoke on message parts received from the story.
* @param finish_cb Function to call when the requested story has been fully
* told (counting message IDs might not suffice, as some messages
* might be secret and thus the listener would not know the story is
- * finished without being told explicitly); once this function
+ * finished without being told explicitly) once this function
* has been called, the client must not call
* GNUNET_PSYC_channel_story_tell_cancel() anymore.
* @param cls Closure for the callbacks.
GNUNET_PSYC_channel_story_tell (struct GNUNET_PSYC_Channel *channel,
uint64_t start_message_id,
uint64_t end_message_id,
- GNUNET_PSYC_Method method,
- GNUNET_PSYC_FinishCallback *finish_cb,
- void *cls);
+ GNUNET_PSYC_MessageCallback message_cb,
+ GNUNET_PSYC_FinishCallback finish_cb,
+ void *cls)
+{
+ return NULL;
+}
-/**
+/**
* Abort story telling.
*
* This function must not be called from within method handlers (as given to
* @param story Story telling operation to stop.
*/
void
-GNUNET_PSYC_channel_story_tell_cancel (struct GNUNET_PSYC_Story *story);
+GNUNET_PSYC_channel_story_tell_cancel (struct GNUNET_PSYC_Story *story)
+{
+}
-/**
+
+/**
* Retrieve the best matching channel state variable.
*
* If the requested variable name is not present in the state, the nearest
GNUNET_PSYC_channel_state_get (struct GNUNET_PSYC_Channel *channel,
const char *full_name,
GNUNET_PSYC_StateCallback cb,
- void *cb_cls);
+ void *cb_cls)
+{
+ return NULL;
+}
-/**
+/**
* Return all channel state variables whose name matches a given prefix.
*
- * A name matches if it starts with the given @a name_prefix, thus requesting the
- * empty prefix ("") will match all values; requesting "_a_b" will also return
- * values stored under "_a_b_c".
+ * A name matches if it starts with the given @a name_prefix, thus requesting
+ * the empty prefix ("") will match all values; requesting "_a_b" will also
+ * return values stored under "_a_b_c".
*
* The @a state_cb is invoked on all matching state variables asynchronously, as
* the state is stored in and retrieved from the PSYCstore,
GNUNET_PSYC_channel_state_get_prefix (struct GNUNET_PSYC_Channel *channel,
const char *name_prefix,
GNUNET_PSYC_StateCallback cb,
- void *cb_cls);
+ void *cb_cls)
+{
+ return NULL;
+}
-/**
+/**
* Cancel a state query operation.
*
* @param query Handle for the operation to cancel.
*/
void
-GNUNET_PSYC_channel_state_get_cancel (struct GNUNET_PSYC_StateQuery *query);
+GNUNET_PSYC_channel_state_get_cancel (struct GNUNET_PSYC_StateQuery *query)
+{
+
+}
/* end of psyc_api.c */
projects / oweals / gnunet.git / blobdiff