* @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;
- const struct GNUNET_MessageHeader *msg;
+ 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;
};
/**
*/
struct GNUNET_PSYC_Channel
{
+ /**
+ * Transmission handle;
+ */
+ struct GNUNET_PSYC_ChannelTransmitHandle tmit;
+
/**
* Configuration to use.
*/
*/
struct OperationHandle *tmit_tail;
+ /**
+ * Message being transmitted to the PSYC service.
+ */
+ struct OperationHandle *tmit_msg;
+
/**
* Message to send on reconnect.
*/
*/
struct GNUNET_TIME_Relative reconnect_delay;
- GNUNET_PSYC_Method method_cb;
+ /**
+ * 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;
/**
- * Are we polling for incoming messages right now?
+ * ID of the message being received from the PSYC service.
*/
- int in_receive;
+ uint64_t recv_message_id;
/**
- * Are we currently transmitting a message?
+ * Public key of the slave from which a message is being received.
*/
- int in_transmit;
+ struct GNUNET_CRYPTO_EddsaPublicKey recv_slave_key;
/**
- * Is this a master or slave channel?
+ * 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.
*/
- int is_master;
+ uint32_t recv_mod_value_size_expected;
/**
- * Buffer space available for transmitting the next data fragment.
+ * Actual value size for the modifier being received from the PSYC service.
*/
- uint16_t tmit_buf_avail;
+ uint32_t recv_mod_value_size;
/**
* Is transmission 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;
-/**
- * Handle for a pending PSYC transmission operation.
- */
-struct GNUNET_PSYC_MasterTransmitHandle
-{
- struct GNUNET_PSYC_Master *master;
- GNUNET_PSYC_MasterTransmitNotify notify;
- void *notify_cls;
- enum GNUNET_PSYC_DataStatus status;
+ /**
+ * Are we currently transmitting a message?
+ */
+ uint8_t in_transmit;
+
+ /**
+ * Is this a master or slave channel?
+ */
+ uint8_t is_master;
};
{
struct GNUNET_PSYC_Channel ch;
- struct GNUNET_PSYC_MasterTransmitHandle *tmit;
-
GNUNET_PSYC_MasterStartCallback start_cb;
uint64_t max_message_id;
struct GNUNET_PSYC_Slave
{
struct GNUNET_PSYC_Channel ch;
+
+ GNUNET_PSYC_SlaveJoinCallback join_cb;
+
+ uint64_t max_message_id;
};
};
-/**
- * Try again to connect to the PSYC service.
- *
- * @param cls Handle to the PSYC service.
- * @param tc Scheduler context
- */
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.
*
/**
- * Request data from client to transmit.
+ * Reset data stored related to the last received message.
+ */
+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;
+}
+
+
+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);
+
+ recv_reset (ch);
+}
+
+
+/**
+ * Queue a message part for transmission to the PSYC service.
+ *
+ * The message part is added to the current message buffer.
+ * When this buffer is full, it is added to the transmission queue.
+ *
+ * @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.
+ */
+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
-master_transmit_data (struct GNUNET_PSYC_Master *mst)
+channel_transmit_mod (struct GNUNET_PSYC_Channel *ch)
{
- struct GNUNET_PSYC_Channel *ch = &mst->ch;
- size_t data_size = ch->tmit_buf_avail;
- struct GNUNET_PSYC_MessageData *pdata;
- struct OperationHandle *op
- = GNUNET_malloc (sizeof (*op) + sizeof (*pdata) + data_size);
- pdata = (struct GNUNET_PSYC_MessageData *) &op[1];
- op->msg = (struct GNUNET_MessageHeader *) pdata;
- pdata->header.type = htons (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_DATA);
-
- switch (mst->tmit->notify (mst->tmit->notify_cls, &data_size, &pdata[1]))
+ 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:
- mst->tmit->status = GNUNET_PSYC_DATA_CONT;
+ if (0 == data_size)
+ {
+ /* Transmission paused, nothing to send. */
+ ch->tmit_paused = GNUNET_YES;
+ return;
+ }
break;
case GNUNET_YES:
- mst->tmit->status = GNUNET_PSYC_DATA_END;
+ ch->tmit.state = MSG_STATE_END;
break;
default:
- mst->tmit->status = GNUNET_PSYC_DATA_CANCEL;
- data_size = 0;
- LOG (GNUNET_ERROR_TYPE_ERROR, "MasterTransmitNotify returned error.\n");
+ 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 ((GNUNET_PSYC_DATA_CONT == mst->tmit->status && 0 == data_size))
+ if (0 < data_size)
{
- /* Transmission paused, nothing to send. */
- ch->tmit_paused = GNUNET_YES;
- GNUNET_free (op);
+ GNUNET_assert (data_size <= GNUNET_PSYC_DATA_MAX_PAYLOAD);
+ msg->size = htons (sizeof (*msg) + data_size);
+ queue_message (ch, msg, !notify_ret);
}
- else
+
+ /* End of message. */
+ if (GNUNET_YES == notify_ret)
{
- GNUNET_assert (data_size <= ch->tmit_buf_avail);
- pdata->header.size = htons (sizeof (*pdata) + data_size);
- pdata->status = htons (mst->tmit->status);
- GNUNET_CONTAINER_DLL_insert_tail (ch->tmit_head, ch->tmit_tail, op);
- ch->tmit_ack_pending = GNUNET_YES;
- transmit_next (ch);
+ 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);
}
}
struct GNUNET_PSYC_Channel *ch = cls;
struct GNUNET_PSYC_Master *mst = cls;
struct GNUNET_PSYC_Slave *slv = cls;
- struct CountersResult *cres;
- struct TransmitAck *tack;
if (NULL == msg)
{
+ // timeout / disconnected from server, reconnect
reschedule_connect (ch);
return;
}
case GNUNET_MESSAGE_TYPE_PSYC_SLAVE_JOIN_ACK:
size_eq = sizeof (struct CountersResult);
break;
- case GNUNET_MESSAGE_TYPE_PSYC_TRANSMIT_ACK:
- size_eq = sizeof (struct TransmitAck);
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE:
+ size_min = sizeof (struct GNUNET_PSYC_MessageHeader);
break;
- case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_METHOD:
- size_min = sizeof (struct GNUNET_PSYC_MessageMethod);
- case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MODIFIER:
- size_min = sizeof (struct GNUNET_PSYC_MessageModifier);
- case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_DATA:
- size_min = sizeof (struct GNUNET_PSYC_MessageData);
+ 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 (0);
- reschedule_connect (ch);
+ GNUNET_break_op (0);
return;
}
switch (type)
{
case GNUNET_MESSAGE_TYPE_PSYC_MASTER_START_ACK:
- cres = (struct CountersResult *) msg;
+ {
+ 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:
- cres = (struct CountersResult *) msg;
-#if TODO
+ {
+ struct CountersResult *cres = (struct CountersResult *) msg;
slv->max_message_id = GNUNET_ntohll (cres->max_message_id);
- if (NULL != slv->join_ack_cb)
- mst->join_ack_cb (ch->cb_cls, mst->max_message_id);
-#endif
- break;
-
- case GNUNET_MESSAGE_TYPE_PSYC_TRANSMIT_ACK:
- tack = (struct TransmitAck *) msg;
- if (ch->is_master)
- {
- GNUNET_assert (NULL != mst->tmit);
- if (GNUNET_PSYC_DATA_CONT != mst->tmit->status
- || NULL == mst->tmit->notify)
- {
- GNUNET_free (mst->tmit);
- mst->tmit = NULL;
- }
- else
- {
- ch->tmit_buf_avail = ntohs (tack->buf_avail);
- ch->tmit_ack_pending = GNUNET_NO;
- if (GNUNET_NO == ch->tmit_paused)
- master_transmit_data (mst);
- }
- }
- else
- {
- /* TODO: slave */
- }
- break;
-
- case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_METHOD:
-
+ if (NULL != slv->join_cb)
+ slv->join_cb (ch->cb_cls, slv->max_message_id);
break;
-
- case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MODIFIER:
-
+ }
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_ACK:
+ {
+ handle_psyc_message_ack (ch);
break;
+ }
- case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_DATA:
-
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE:
+ handle_psyc_message (ch, (const struct GNUNET_PSYC_MessageHeader *) msg);
break;
}
- GNUNET_CLIENT_receive (ch->client, &message_handler, ch,
- GNUNET_TIME_UNIT_FOREVER_REL);
+ if (NULL != ch->client)
+ {
+ GNUNET_CLIENT_receive (ch->client, &message_handler, ch,
+ GNUNET_TIME_UNIT_FOREVER_REL);
+ }
}
{
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");
* 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 master_started_cb Function to invoke after the channel master started.
* @param cls Closure for @a master_started_cb and @a join_cb.
GNUNET_PSYC_master_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
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,
GNUNET_PSYC_MasterStartCallback master_started_cb,
void *cls)
ch->reconnect_delay = GNUNET_TIME_UNIT_ZERO;
ch->reconnect_task = GNUNET_SCHEDULER_add_now (&reconnect, mst);
- ch->method_cb = method;
+ ch->message_cb = message_cb;
ch->join_cb = join_cb;
ch->cb_cls = cls;
mst->start_cb = master_started_cb;
}
-/* FIXME: split up value into <64K chunks and transmit the continuations in
- * MOD_CONT msgs */
-static int
-send_modifier (void *cls, struct GNUNET_ENV_Modifier *mod)
-{
- struct GNUNET_PSYC_Channel *ch = cls;
- size_t name_size = strlen (mod->name) + 1;
- struct GNUNET_PSYC_MessageModifier *pmod;
- struct OperationHandle *op = GNUNET_malloc (sizeof (*op) + sizeof (*pmod)
- + name_size + mod->value_size);
- pmod = (struct GNUNET_PSYC_MessageModifier *) &op[1];
- op->msg = (struct GNUNET_MessageHeader *) pmod;
-
- pmod->header.type = htons (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MODIFIER);
- pmod->header.size = htons (sizeof (*pmod) + name_size + mod->value_size);
- pmod->name_size = htons (name_size);
- memcpy (&pmod[1], mod->name, name_size);
- memcpy ((char *) &pmod[1] + name_size, mod->value, mod->value_size);
-
- GNUNET_CONTAINER_DLL_insert_tail (ch->tmit_head, ch->tmit_tail, op);
- return GNUNET_YES;
-}
-
-
/**
* 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).
+ * @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)
{
- GNUNET_assert (NULL != master);
- struct GNUNET_PSYC_Channel *ch = &master->ch;
- 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
- = GNUNET_malloc (sizeof (*op) + sizeof (*pmeth) + size);
- pmeth = (struct GNUNET_PSYC_MessageMethod *) &op[1];
- op->msg = (struct GNUNET_MessageHeader *) pmeth;
-
- pmeth->header.type = htons (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_METHOD);
- pmeth->header.size = htons (sizeof (*pmeth) + size);
- pmeth->flags = htonl (flags);
- pmeth->mod_count = GNUNET_ntohll (GNUNET_ENV_environment_get_mod_count (env));
- memcpy (&pmeth[1], method_name, size);
-
- GNUNET_CONTAINER_DLL_insert_tail (ch->tmit_head, ch->tmit_tail, op);
- GNUNET_ENV_environment_iterate (env, send_modifier, master);
- transmit_next (ch);
-
- master->tmit = GNUNET_malloc (sizeof (*master->tmit));
- master->tmit->master = master;
- master->tmit->notify = notify;
- master->tmit->notify_cls = notify_cls;
- master->tmit->status = GNUNET_PSYC_DATA_CONT;
- return master->tmit;
+ return (struct GNUNET_PSYC_MasterTransmitHandle *)
+ channel_transmit (&master->ch, method_name, notify_mod, notify_data,
+ notify_cls, flags);
}
void
GNUNET_PSYC_master_transmit_resume (struct GNUNET_PSYC_MasterTransmitHandle *th)
{
- struct GNUNET_PSYC_Channel *ch = &th->master->ch;
- if (GNUNET_NO == ch->tmit_ack_pending)
- {
- ch->tmit_paused = GNUNET_NO;
- master_transmit_data (th->master);
- }
+ channel_transmit_resume ((struct GNUNET_PSYC_ChannelTransmitHandle *) th);
}
void
GNUNET_PSYC_master_transmit_cancel (struct GNUNET_PSYC_MasterTransmitHandle *th)
{
- struct GNUNET_PSYC_Master *master = th->master;
- struct GNUNET_PSYC_Channel *ch = &master->ch;
- if (GNUNET_NO != ch->in_transmit)
- return;
+ channel_transmit_cancel ((struct GNUNET_PSYC_ChannelTransmitHandle *) th);
}
* @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 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 method_cb and @a slave_joined_cb.
+ * @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.
const struct GNUNET_PeerIdentity *origin,
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,
{
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));
+ 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 = relay_count;
+ 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;
}
*
* @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
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)
{
- return NULL;
+ return (struct GNUNET_PSYC_SlaveTransmitHandle *)
+ channel_transmit (&slave->ch, method_name,
+ notify_mod, notify_data, notify_cls, flags);
}
* @param th Handle of the request that is being resumed.
*/
void
-GNUNET_PSYC_slave_transmit_resume (struct GNUNET_PSYC_MasterTransmitHandle *th)
+GNUNET_PSYC_slave_transmit_resume (struct GNUNET_PSYC_SlaveTransmitHandle *th)
{
-
+ channel_transmit_resume ((struct GNUNET_PSYC_ChannelTransmitHandle *) th);
}
void
GNUNET_PSYC_slave_transmit_cancel (struct GNUNET_PSYC_SlaveTransmitHandle *th)
{
-
+ channel_transmit_cancel ((struct GNUNET_PSYC_ChannelTransmitHandle *) th);
}
struct GNUNET_PSYC_Channel *
GNUNET_PSYC_master_get_channel (struct GNUNET_PSYC_Master *master)
{
- return (struct GNUNET_PSYC_Channel *) master;
+ return &master->ch;
}
struct GNUNET_PSYC_Channel *
GNUNET_PSYC_slave_get_channel (struct GNUNET_PSYC_Slave *slave)
{
- return (struct GNUNET_PSYC_Channel *) slave;
+ return &slave->ch;
}
* @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
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,
+ GNUNET_PSYC_MessageCallback message_cb,
+ GNUNET_PSYC_FinishCallback finish_cb,
void *cls)
{
return NULL;
projects / oweals / gnunet.git / blobdiff