/*
This file is part of GNUnet.
- (C) 2009, 2010 Christian Grothoff (and other contributing authors)
+ (C) 2009, 2010, 2011, 2012 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
*/
#include "platform.h"
-#include "gnunet_bandwidth_lib.h"
-#include "gnunet_client_lib.h"
+#include "gnunet_util_lib.h"
#include "gnunet_constants.h"
-#include "gnunet_container_lib.h"
#include "gnunet_arm_service.h"
#include "gnunet_hello_lib.h"
#include "gnunet_protocols.h"
-#include "gnunet_server_lib.h"
-#include "gnunet_time_lib.h"
#include "gnunet_dht_service.h"
#include "dht.h"
-#define DEBUG_DHT_API GNUNET_NO
+#define LOG(kind,...) GNUNET_log_from (kind, "dht-api",__VA_ARGS__)
/**
* Entry in our list of messages to be (re-)transmitted.
* of this struct.
*/
const struct GNUNET_MessageHeader *msg;
-
+
/**
* Handle to the DHT API context.
*/
struct GNUNET_DHT_Handle *handle;
-
+
/**
* Continuation to call when the request has been
* transmitted (for the first time) to the service; can be NULL.
*/
void *cont_cls;
- /**
- * Timeout task for this message
- */
- GNUNET_SCHEDULER_TaskIdentifier timeout_task;
-
/**
* Unique ID for this request
*/
/**
- * Handle to a route request
+ * Handle to a PUT request.
*/
-struct GNUNET_DHT_RouteHandle
+struct GNUNET_DHT_PutHandle
+{
+ /**
+ * Kept in a DLL.
+ */
+ struct GNUNET_DHT_PutHandle *next;
+
+ /**
+ * Kept in a DLL.
+ */
+ struct GNUNET_DHT_PutHandle *prev;
+
+ /**
+ * Continuation to call when done.
+ */
+ GNUNET_DHT_PutContinuation cont;
+
+ /**
+ * Pending message associated with this PUT operation,
+ * NULL after the message has been transmitted to the service.
+ */
+ struct PendingMessage *pending;
+
+ /**
+ * Main handle to this DHT api
+ */
+ struct GNUNET_DHT_Handle *dht_handle;
+
+ /**
+ * Closure for 'cont'.
+ */
+ void *cont_cls;
+
+ /**
+ * Timeout task for this operation.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
+
+ /**
+ * Unique ID for the PUT operation.
+ */
+ uint64_t unique_id;
+
+};
+
+
+
+/**
+ * Handle to a GET request
+ */
+struct GNUNET_DHT_GetHandle
{
/**
* Iterator to call on data receipt
*/
- GNUNET_DHT_ReplyProcessor iter;
+ GNUNET_DHT_GetIterator iter;
/**
* Closure for the iterator callback
/**
* Key that this get request is for
*/
- GNUNET_HashCode key;
+ struct GNUNET_HashCode key;
/**
- * Unique identifier for this request (for key collisions). FIXME: redundant!?
+ * Unique identifier for this request (for key collisions).
*/
- uint64_t uid;
+ uint64_t unique_id;
};
+/**
+ * Handle to a monitoring request.
+ */
+struct GNUNET_DHT_MonitorHandle
+{
+ /**
+ * DLL.
+ */
+ struct GNUNET_DHT_MonitorHandle *next;
+
+ /**
+ * DLL.
+ */
+ struct GNUNET_DHT_MonitorHandle *prev;
+
+ /**
+ * Main handle to this DHT api.
+ */
+ struct GNUNET_DHT_Handle *dht_handle;
+
+ /**
+ * Type of block looked for.
+ */
+ enum GNUNET_BLOCK_Type type;
+
+ /**
+ * Key being looked for, NULL == all.
+ */
+ struct GNUNET_HashCode *key;
+
+ /**
+ * Callback for each received message of type get.
+ */
+ GNUNET_DHT_MonitorGetCB get_cb;
+
+ /**
+ * Callback for each received message of type get response.
+ */
+ GNUNET_DHT_MonitorGetRespCB get_resp_cb;
+
+ /**
+ * Callback for each received message of type put.
+ */
+ GNUNET_DHT_MonitorPutCB put_cb;
+
+ /**
+ * Closure for cb.
+ */
+ void *cb_cls;
+
+};
+
+
/**
* Connection to the DHT service.
*/
struct PendingMessage *pending_tail;
/**
- * Hash map containing the current outstanding unique requests
- * (values are of type 'struct GNUNET_DHT_RouteHandle').
+ * Head of linked list of messages we would like to monitor.
+ */
+ struct GNUNET_DHT_MonitorHandle *monitor_head;
+
+ /**
+ * Tail of linked list of messages we would like to monitor.
+ */
+ struct GNUNET_DHT_MonitorHandle *monitor_tail;
+
+ /**
+ * Head of active PUT requests.
+ */
+ struct GNUNET_DHT_PutHandle *put_head;
+
+ /**
+ * Tail of active PUT requests.
+ */
+ struct GNUNET_DHT_PutHandle *put_tail;
+
+ /**
+ * Hash map containing the current outstanding unique GET requests
+ * (values are of type 'struct GNUNET_DHT_GetHandle').
*/
struct GNUNET_CONTAINER_MultiHashMap *active_requests;
*/
uint64_t uid_gen;
+ /**
+ * Did we start our receive loop yet?
+ */
+ int in_receive;
};
-/**
- * Transmit the next pending message, called by notify_transmit_ready
- */
-static size_t
-transmit_pending (void *cls,
- size_t size,
- void *buf);
-
-
/**
* Handler for messages received from the DHT service
* a demultiplexer which handles numerous message types
*
+ * @param cls the 'struct GNUNET_DHT_Handle'
+ * @param msg the incoming message
*/
static void
-service_message_handler (void *cls,
- const struct GNUNET_MessageHeader *msg);
-
-
+service_message_handler (void *cls, const struct GNUNET_MessageHeader *msg);
/**
* Try to (re)connect to the DHT service.
*
+ * @param handle DHT handle to reconnect
* @return GNUNET_YES on success, GNUNET_NO on failure.
*/
static int
try_connect (struct GNUNET_DHT_Handle *handle)
{
- if (handle->client != NULL)
+ if (NULL != handle->client)
return GNUNET_OK;
+ handle->in_receive = GNUNET_NO;
handle->client = GNUNET_CLIENT_connect ("dht", handle->cfg);
- if (handle->client == NULL)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to connect to the DHT service!\n"));
- return GNUNET_NO;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Starting to process replies from DHT\n");
- GNUNET_CLIENT_receive (handle->client,
- &service_message_handler,
- handle,
- GNUNET_TIME_UNIT_FOREVER_REL);
+ if (NULL == handle->client)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Failed to connect to the DHT service!\n"));
+ return GNUNET_NO;
+ }
return GNUNET_YES;
}
*
* @param cls the 'struct GNUNET_DHT_Handle*'
* @param key key for the request (not used)
- * @param value the 'struct GNUNET_DHT_RouteHandle*'
+ * @param value the 'struct GNUNET_DHT_GetHandle*'
* @return GNUNET_YES (always)
*/
static int
-add_request_to_pending (void *cls,
- const GNUNET_HashCode *key,
- void *value)
+add_request_to_pending (void *cls, const struct GNUNET_HashCode * key, void *value)
{
struct GNUNET_DHT_Handle *handle = cls;
- struct GNUNET_DHT_RouteHandle *rh = value;
+ struct GNUNET_DHT_GetHandle *rh = value;
if (GNUNET_NO == rh->message->in_pending_queue)
- {
- GNUNET_CONTAINER_DLL_insert (handle->pending_head,
- handle->pending_tail,
- rh->message);
- rh->message->in_pending_queue = GNUNET_YES;
- }
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Retransmitting request related to %s to DHT %p\n", GNUNET_h2s (key),
+ handle);
+ GNUNET_CONTAINER_DLL_insert (handle->pending_head, handle->pending_tail,
+ rh->message);
+ rh->message->in_pending_queue = GNUNET_YES;
+ }
return GNUNET_YES;
}
+/**
+ * Try to send messages from list of messages to send
+ *
+ * @param handle DHT_Handle
+ */
+static void
+process_pending_messages (struct GNUNET_DHT_Handle *handle);
+
+
/**
* Try reconnecting to the dht service.
*
* @param tc scheduler context
*/
static void
-try_reconnect (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+try_reconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_DHT_Handle *handle = cls;
- handle->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
- if (handle->retry_time.rel_value < GNUNET_CONSTANTS_SERVICE_RETRY.rel_value)
- handle->retry_time = GNUNET_CONSTANTS_SERVICE_RETRY;
- else
- handle->retry_time = GNUNET_TIME_relative_multiply (handle->retry_time, 2);
- if (handle->retry_time.rel_value > GNUNET_CONSTANTS_SERVICE_TIMEOUT.rel_value)
- handle->retry_time = GNUNET_CONSTANTS_SERVICE_TIMEOUT;
- handle->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
- handle->client = GNUNET_CLIENT_connect ("dht", handle->cfg);
- if (handle->client == NULL)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "dht reconnect failed(!)\n");
- return;
- }
- GNUNET_CONTAINER_multihashmap_iterate (handle->active_requests,
- &add_request_to_pending,
- handle);
- if (handle->pending_head == NULL)
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Reconnecting with DHT %p\n", handle);
+ handle->retry_time = GNUNET_TIME_STD_BACKOFF (handle->retry_time);
+ handle->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ if (GNUNET_YES != try_connect (handle))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "dht reconnect failed(!)\n");
return;
-
- GNUNET_CLIENT_notify_transmit_ready (handle->client,
- ntohs(handle->pending_head->msg->size),
- GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_NO,
- &transmit_pending,
- handle);
+ }
+ GNUNET_CONTAINER_multihashmap_iterate (handle->active_requests,
+ &add_request_to_pending, handle);
+ process_pending_messages (handle);
}
static void
do_disconnect (struct GNUNET_DHT_Handle *handle)
{
- if (handle->client == NULL)
+ struct GNUNET_DHT_PutHandle *ph;
+ struct GNUNET_DHT_PutHandle *next;
+
+ if (NULL == handle->client)
return;
- GNUNET_assert(handle->reconnect_task == GNUNET_SCHEDULER_NO_TASK);
- GNUNET_CLIENT_disconnect (handle->client, GNUNET_NO);
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == handle->reconnect_task);
+ if (NULL != handle->th)
+ GNUNET_CLIENT_notify_transmit_ready_cancel (handle->th);
+ handle->th = NULL;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Disconnecting from DHT service, will try to reconnect in %s\n",
+ GNUNET_STRINGS_relative_time_to_string (handle->retry_time,
+ GNUNET_YES));
+ GNUNET_CLIENT_disconnect (handle->client);
handle->client = NULL;
- handle->reconnect_task = GNUNET_SCHEDULER_add_delayed (handle->retry_time,
- &try_reconnect,
- handle);
+
+ /* signal disconnect to all PUT requests that were transmitted but waiting
+ for the put confirmation */
+ next = handle->put_head;
+ while (NULL != (ph = next))
+ {
+ next = ph->next;
+ if (NULL == ph->pending)
+ {
+ if (NULL != ph->cont)
+ ph->cont (ph->cont_cls, GNUNET_SYSERR);
+ GNUNET_DHT_put_cancel (ph);
+ }
+ }
+ handle->reconnect_task =
+ GNUNET_SCHEDULER_add_delayed (handle->retry_time, &try_reconnect, handle);
}
+/**
+ * Transmit the next pending message, called by notify_transmit_ready
+ *
+ * @param cls the DHT handle
+ * @param size number of bytes available in 'buf' for transmission
+ * @param buf where to copy messages for the service
+ * @return number of bytes written to 'buf'
+ */
+static size_t
+transmit_pending (void *cls, size_t size, void *buf);
+
+
/**
* Try to send messages from list of messages to send
+ *
+ * @param handle handle to DHT
*/
static void
process_pending_messages (struct GNUNET_DHT_Handle *handle)
{
struct PendingMessage *head;
- if (handle->client == NULL)
- {
- do_disconnect(handle);
- return;
- }
- if (handle->th != NULL)
+ if (NULL == handle->client)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "process_pending_messages called, but client is NULL, reconnecting\n");
+ do_disconnect (handle);
+ return;
+ }
+ if (NULL != handle->th)
return;
if (NULL == (head = handle->pending_head))
return;
- handle->th = GNUNET_CLIENT_notify_transmit_ready (handle->client,
- ntohs (head->msg->size),
- GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_YES,
- &transmit_pending,
- handle);
- if (NULL == handle->th)
- {
- do_disconnect (handle);
- return;
- }
+ handle->th =
+ GNUNET_CLIENT_notify_transmit_ready (handle->client,
+ ntohs (head->msg->size),
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ GNUNET_YES, &transmit_pending,
+ handle);
+ if (NULL != handle->th)
+ return;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "notify_transmit_ready returned NULL, reconnecting\n");
+ do_disconnect (handle);
}
/**
* Transmit the next pending message, called by notify_transmit_ready
+ *
+ * @param cls the DHT handle
+ * @param size number of bytes available in 'buf' for transmission
+ * @param buf where to copy messages for the service
+ * @return number of bytes written to 'buf'
*/
static size_t
-transmit_pending (void *cls,
- size_t size,
- void *buf)
+transmit_pending (void *cls, size_t size, void *buf)
{
struct GNUNET_DHT_Handle *handle = cls;
struct PendingMessage *head;
size_t tsize;
handle->th = NULL;
- if (buf == NULL)
- {
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Transmission to DHT service failed! Reconnecting!\n");
- do_disconnect (handle);
- return 0;
- }
+ if (NULL == buf)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Transmission to DHT service failed! Reconnecting!\n");
+ do_disconnect (handle);
+ return 0;
+ }
if (NULL == (head = handle->pending_head))
return 0;
-
+
tsize = ntohs (head->msg->size);
if (size < tsize)
- {
- process_pending_messages (handle);
- return 0;
- }
+ {
+ process_pending_messages (handle);
+ return 0;
+ }
memcpy (buf, head->msg, tsize);
- GNUNET_CONTAINER_DLL_remove (handle->pending_head,
- handle->pending_tail,
- head);
- if (head->timeout_task != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel (head->timeout_task);
- head->timeout_task = GNUNET_SCHEDULER_NO_TASK;
- }
- if (NULL != head->cont)
- {
- GNUNET_SCHEDULER_add_continuation (head->cont,
- head->cont_cls,
- GNUNET_SCHEDULER_REASON_PREREQ_DONE);
- head->cont = NULL;
- head->cont_cls = NULL;
- }
+ GNUNET_CONTAINER_DLL_remove (handle->pending_head, handle->pending_tail,
+ head);
head->in_pending_queue = GNUNET_NO;
+ if (NULL != head->cont)
+ {
+ head->cont (head->cont_cls, NULL);
+ head->cont = NULL;
+ head->cont_cls = NULL;
+ }
if (GNUNET_YES == head->free_on_send)
GNUNET_free (head);
process_pending_messages (handle);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Forwarded request of %u bytes to DHT service\n",
- (unsigned int) tsize);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Forwarded request of %u bytes to DHT service\n", (unsigned int) tsize);
+ if (GNUNET_NO == handle->in_receive)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Starting to process replies from DHT\n");
+ handle->in_receive = GNUNET_YES;
+ GNUNET_CLIENT_receive (handle->client, &service_message_handler, handle,
+ GNUNET_TIME_UNIT_FOREVER_REL);
+ }
return tsize;
}
/**
* Process a given reply that might match the given
* request.
+ *
+ * @param cls the 'struct GNUNET_DHT_ClientResultMessage'
+ * @param key query of the request
+ * @param value the 'struct GNUNET_DHT_RouteHandle' of a request matching the same key
+ * @return GNUNET_YES to continue to iterate over all results,
+ * GNUNET_NO if the reply is malformed
*/
static int
-process_reply (void *cls,
- const GNUNET_HashCode *key,
- void *value)
+process_reply (void *cls, const struct GNUNET_HashCode * key, void *value)
{
- const struct GNUNET_DHT_RouteResultMessage *dht_msg = cls;
- struct GNUNET_DHT_RouteHandle *rh = value;
- const struct GNUNET_MessageHeader *enc_msg;
- size_t enc_size;
- uint64_t uid;
- const struct GNUNET_PeerIdentity **outgoing_path;
- const struct GNUNET_PeerIdentity *pos;
- uint32_t outgoing_path_length;
- unsigned int i;
- char *path_offset;
-
- uid = GNUNET_ntohll (dht_msg->unique_id);
- if (uid != rh->uid)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Reply UID did not match request UID\n");
- return GNUNET_YES;
- }
- enc_msg = (const struct GNUNET_MessageHeader *)&dht_msg[1];
- enc_size = ntohs (enc_msg->size);
- if (enc_size < sizeof (struct GNUNET_MessageHeader))
- {
- GNUNET_break (0);
- return GNUNET_NO;
- }
- path_offset = (char *)&dht_msg[1];
- path_offset += enc_size;
- pos = (const struct GNUNET_PeerIdentity *) path_offset;
- outgoing_path_length = ntohl (dht_msg->outgoing_path_length);
- if (outgoing_path_length * sizeof (struct GNUNET_PeerIdentity) > ntohs(dht_msg->header.size) - enc_size)
- {
- GNUNET_break (0);
- return GNUNET_NO;
- }
+ const struct GNUNET_DHT_ClientResultMessage *dht_msg = cls;
+ struct GNUNET_DHT_GetHandle *get_handle = value;
+ const struct GNUNET_PeerIdentity *put_path;
+ const struct GNUNET_PeerIdentity *get_path;
+ uint32_t put_path_length;
+ uint32_t get_path_length;
+ size_t data_length;
+ size_t msize;
+ size_t meta_length;
+ const void *data;
+
+ if (dht_msg->unique_id != get_handle->unique_id)
+ {
+ /* UID mismatch */
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Ignoring reply for %s: UID mismatch: %llu/%llu\n", GNUNET_h2s (key),
+ dht_msg->unique_id, get_handle->unique_id);
+ return GNUNET_YES;
+ }
+ msize = ntohs (dht_msg->header.size);
+ put_path_length = ntohl (dht_msg->put_path_length);
+ get_path_length = ntohl (dht_msg->get_path_length);
+ meta_length =
+ sizeof (struct GNUNET_DHT_ClientResultMessage) +
+ sizeof (struct GNUNET_PeerIdentity) * (get_path_length + put_path_length);
+ if ((msize < meta_length) ||
+ (get_path_length >
+ GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_PeerIdentity)) ||
+ (put_path_length >
+ GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_PeerIdentity)))
+ {
+ GNUNET_break (0);
+ return GNUNET_NO;
+ }
+ data_length = msize - meta_length;
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Giving %u byte reply for %s to application\n",
+ (unsigned int) data_length, GNUNET_h2s (key));
+ put_path = (const struct GNUNET_PeerIdentity *) &dht_msg[1];
+ get_path = &put_path[put_path_length];
+ data = &get_path[get_path_length];
+ get_handle->iter (get_handle->iter_cls,
+ GNUNET_TIME_absolute_ntoh (dht_msg->expiration), key,
+ get_path, get_path_length, put_path, put_path_length,
+ ntohl (dht_msg->type), data_length, data);
+ return GNUNET_YES;
+}
- if (outgoing_path_length > 0)
- {
- outgoing_path = GNUNET_malloc ((outgoing_path_length + 1) * sizeof (struct GNUNET_PeerIdentity*));
- for (i = 0; i < outgoing_path_length; i++)
- {
- outgoing_path[i] = pos;
- pos++;
- }
- outgoing_path[outgoing_path_length] = NULL;
- }
- else
- outgoing_path = NULL;
+/**
+ * Process a get monitor message from the service.
+ *
+ * @param handle The DHT handle.
+ * @param msg Monitor get message from the service.
+ *
+ * @return GNUNET_OK if everything went fine,
+ * GNUNET_SYSERR if the message is malformed.
+ */
+static int
+process_monitor_get_message (struct GNUNET_DHT_Handle *handle,
+ const struct GNUNET_DHT_MonitorGetMessage *msg)
+{
+ struct GNUNET_DHT_MonitorHandle *h;
+
+ for (h = handle->monitor_head; NULL != h; h = h->next)
+ {
+ int type_ok;
+ int key_ok;
+
+ type_ok = (GNUNET_BLOCK_TYPE_ANY == h->type) || (h->type == ntohl(msg->type));
+ key_ok = (NULL == h->key) || (0 == memcmp (h->key, &msg->key,
+ sizeof (struct GNUNET_HashCode)));
+ if (type_ok && key_ok && (NULL != h->get_cb))
+ h->get_cb (h->cb_cls,
+ ntohl (msg->options),
+ (enum GNUNET_BLOCK_Type) ntohl(msg->type),
+ ntohl (msg->hop_count),
+ ntohl (msg->desired_replication_level),
+ ntohl (msg->get_path_length),
+ (struct GNUNET_PeerIdentity *) &msg[1],
+ &msg->key);
+ }
+ return GNUNET_OK;
+}
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Processing reply.\n");
- rh->iter (rh->iter_cls,
- &rh->key,
- outgoing_path,
- enc_msg);
- GNUNET_free_non_null (outgoing_path);
- return GNUNET_YES;
+
+/**
+ * Process a get response monitor message from the service.
+ *
+ * @param handle The DHT handle.
+ * @param msg monitor get response message from the service
+ * @return GNUNET_OK if everything went fine,
+ * GNUNET_SYSERR if the message is malformed.
+ */
+static int
+process_monitor_get_resp_message (struct GNUNET_DHT_Handle *handle,
+ const struct GNUNET_DHT_MonitorGetRespMessage
+ *msg)
+{
+ struct GNUNET_DHT_MonitorHandle *h;
+ struct GNUNET_PeerIdentity *path;
+ uint32_t getl;
+ uint32_t putl;
+ size_t msize;
+
+ msize = ntohs (msg->header.size);
+ path = (struct GNUNET_PeerIdentity *) &msg[1];
+ getl = ntohl (msg->get_path_length);
+ putl = ntohl (msg->put_path_length);
+ if ( (getl + putl < getl) ||
+ ( ((msize - sizeof (struct GNUNET_DHT_MonitorGetRespMessage)) / sizeof (struct GNUNET_PeerIdentity)) < getl + putl) )
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ for (h = handle->monitor_head; NULL != h; h = h->next)
+ {
+ int type_ok;
+ int key_ok;
+
+ type_ok = (GNUNET_BLOCK_TYPE_ANY == h->type) || (h->type == ntohl(msg->type));
+ key_ok = (NULL == h->key) || (0 == memcmp (h->key, &msg->key,
+ sizeof (struct GNUNET_HashCode)));
+ if (type_ok && key_ok && (NULL != h->get_resp_cb))
+ h->get_resp_cb (h->cb_cls,
+ (enum GNUNET_BLOCK_Type) ntohl(msg->type),
+ path, getl,
+ &path[getl], putl,
+ GNUNET_TIME_absolute_ntoh(msg->expiration_time),
+ &msg->key,
+ (void *) &path[getl + putl],
+ msize -
+ sizeof (struct GNUNET_DHT_MonitorGetRespMessage) -
+ sizeof (struct GNUNET_PeerIdentity) * (putl + getl));
+ }
+ return GNUNET_OK;
+}
+
+
+/**
+ * Process a put monitor message from the service.
+ *
+ * @param handle The DHT handle.
+ * @param msg Monitor put message from the service.
+ *
+ * @return GNUNET_OK if everything went fine,
+ * GNUNET_SYSERR if the message is malformed.
+ */
+static int
+process_monitor_put_message (struct GNUNET_DHT_Handle *handle,
+ const struct GNUNET_DHT_MonitorPutMessage *msg)
+{
+ struct GNUNET_DHT_MonitorHandle *h;
+ size_t msize;
+ struct GNUNET_PeerIdentity *path;
+ uint32_t putl;
+
+ msize = ntohs (msg->header.size);
+ path = (struct GNUNET_PeerIdentity *) &msg[1];
+ putl = ntohl (msg->put_path_length);
+ if (((msize - sizeof (struct GNUNET_DHT_MonitorGetRespMessage)) / sizeof (struct GNUNET_PeerIdentity)) < putl)
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ for (h = handle->monitor_head; NULL != h; h = h->next)
+ {
+ int type_ok;
+ int key_ok;
+
+ type_ok = (GNUNET_BLOCK_TYPE_ANY == h->type) || (h->type == ntohl(msg->type));
+ key_ok = (NULL == h->key) || (0 == memcmp (h->key, &msg->key,
+ sizeof (struct GNUNET_HashCode)));
+ if (type_ok && key_ok && (NULL != h->put_cb))
+ h->put_cb (h->cb_cls,
+ ntohl (msg->options),
+ (enum GNUNET_BLOCK_Type) ntohl(msg->type),
+ ntohl (msg->hop_count),
+ ntohl (msg->desired_replication_level),
+ putl, path,
+ GNUNET_TIME_absolute_ntoh(msg->expiration_time),
+ &msg->key,
+ (void *) &path[putl],
+ msize -
+ sizeof (struct GNUNET_DHT_MonitorPutMessage) -
+ sizeof (struct GNUNET_PeerIdentity) * putl);
+ }
+ return GNUNET_OK;
+}
+
+
+/**
+ * Process a put confirmation message from the service.
+ *
+ * @param handle The DHT handle.
+ * @param msg confirmation message from the service.
+ * @return GNUNET_OK if everything went fine,
+ * GNUNET_SYSERR if the message is malformed.
+ */
+static int
+process_put_confirmation_message (struct GNUNET_DHT_Handle *handle,
+ const struct GNUNET_DHT_ClientPutConfirmationMessage *msg)
+{
+ struct GNUNET_DHT_PutHandle *ph;
+ GNUNET_DHT_PutContinuation cont;
+ void *cont_cls;
+
+ for (ph = handle->put_head; NULL != ph; ph = ph->next)
+ if (ph->unique_id == msg->unique_id)
+ break;
+ if (NULL == ph)
+ return GNUNET_OK;
+ cont = ph->cont;
+ cont_cls = ph->cont_cls;
+ GNUNET_DHT_put_cancel (ph);
+ if (NULL != cont)
+ cont (cont_cls, GNUNET_OK);
+ return GNUNET_OK;
}
* @param msg the incoming message
*/
static void
-service_message_handler (void *cls,
- const struct GNUNET_MessageHeader *msg)
+service_message_handler (void *cls, const struct GNUNET_MessageHeader *msg)
{
struct GNUNET_DHT_Handle *handle = cls;
- const struct GNUNET_DHT_RouteResultMessage *dht_msg;
+ const struct GNUNET_DHT_ClientResultMessage *dht_msg;
+ uint16_t msize;
+ int ret;
- if (msg == NULL)
+ if (NULL == msg)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Error receiving data from DHT service, reconnecting\n");
+ do_disconnect (handle);
+ return;
+ }
+ ret = GNUNET_SYSERR;
+ msize = ntohs (msg->size);
+ switch (ntohs (msg->type))
+ {
+ case GNUNET_MESSAGE_TYPE_DHT_MONITOR_GET:
+ if (msize < sizeof (struct GNUNET_DHT_MonitorGetMessage))
{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Error receiving data from DHT service, reconnecting\n");
- do_disconnect (handle);
- return;
+ GNUNET_break (0);
+ break;
}
- if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_DHT_LOCAL_ROUTE_RESULT)
+ ret = process_monitor_get_message(handle,
+ (const struct GNUNET_DHT_MonitorGetMessage *) msg);
+ break;
+ case GNUNET_MESSAGE_TYPE_DHT_MONITOR_GET_RESP:
+ if (msize < sizeof (struct GNUNET_DHT_MonitorGetRespMessage))
{
GNUNET_break (0);
- do_disconnect (handle);
- return;
+ break;
}
- if (ntohs (msg->size) < sizeof (struct GNUNET_DHT_RouteResultMessage))
+ ret = process_monitor_get_resp_message(handle,
+ (const struct GNUNET_DHT_MonitorGetRespMessage *) msg);
+ break;
+ case GNUNET_MESSAGE_TYPE_DHT_MONITOR_PUT:
+ if (msize < sizeof (struct GNUNET_DHT_MonitorPutMessage))
{
GNUNET_break (0);
- do_disconnect (handle);
- return;
+ break;
}
- dht_msg = (const struct GNUNET_DHT_RouteResultMessage *) msg;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Comparing reply `%s' against %u pending requests.\n",
- GNUNET_h2s (&dht_msg->key),
- GNUNET_CONTAINER_multihashmap_size (handle->active_requests));
- GNUNET_CONTAINER_multihashmap_get_multiple (handle->active_requests,
- &dht_msg->key,
- &process_reply,
- (void*) dht_msg);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Continuing to process replies from DHT\n");
- GNUNET_CLIENT_receive (handle->client,
- &service_message_handler,
- handle, GNUNET_TIME_UNIT_FOREVER_REL);
-
+ ret = process_monitor_put_message(handle,
+ (const struct GNUNET_DHT_MonitorPutMessage *) msg);
+ break;
+ case GNUNET_MESSAGE_TYPE_DHT_MONITOR_PUT_RESP:
+ /* Not implemented yet */
+ GNUNET_break(0);
+ break;
+ case GNUNET_MESSAGE_TYPE_DHT_CLIENT_RESULT:
+ if (ntohs (msg->size) < sizeof (struct GNUNET_DHT_ClientResultMessage))
+ {
+ GNUNET_break (0);
+ break;
+ }
+ ret = GNUNET_OK;
+ dht_msg = (const struct GNUNET_DHT_ClientResultMessage *) msg;
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Received reply for `%s' from DHT service %p\n",
+ GNUNET_h2s (&dht_msg->key), handle);
+ GNUNET_CONTAINER_multihashmap_get_multiple (handle->active_requests,
+ &dht_msg->key, &process_reply,
+ (void *) dht_msg);
+ break;
+ case GNUNET_MESSAGE_TYPE_DHT_CLIENT_PUT_OK:
+ if (ntohs (msg->size) != sizeof (struct GNUNET_DHT_ClientPutConfirmationMessage))
+ {
+ GNUNET_break (0);
+ break;
+ }
+ ret = process_put_confirmation_message (handle,
+ (const struct GNUNET_DHT_ClientPutConfirmationMessage*) msg);
+ break;
+ default:
+ GNUNET_break(0);
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Unknown DHT message type: %hu (%hu) size: %hu\n",
+ ntohs (msg->type), msg->type, msize);
+ break;
+ }
+ if (GNUNET_OK != ret)
+ {
+ GNUNET_break (0);
+ do_disconnect (handle);
+ return;
+ }
+ GNUNET_CLIENT_receive (handle->client, &service_message_handler, handle,
+ GNUNET_TIME_UNIT_FOREVER_REL);
}
handle = GNUNET_malloc (sizeof (struct GNUNET_DHT_Handle));
handle->cfg = cfg;
- handle->uid_gen = GNUNET_CRYPTO_random_u64(GNUNET_CRYPTO_QUALITY_WEAK, UINT64_MAX);
- handle->active_requests = GNUNET_CONTAINER_multihashmap_create (ht_len);
+ handle->uid_gen =
+ GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK, UINT64_MAX);
+ handle->active_requests = GNUNET_CONTAINER_multihashmap_create (ht_len, GNUNET_NO);
if (GNUNET_NO == try_connect (handle))
- {
- GNUNET_DHT_disconnect (handle);
- return NULL;
- }
+ {
+ GNUNET_DHT_disconnect (handle);
+ return NULL;
+ }
return handle;
}
GNUNET_DHT_disconnect (struct GNUNET_DHT_Handle *handle)
{
struct PendingMessage *pm;
- GNUNET_assert(handle != NULL);
- GNUNET_assert (0 == GNUNET_CONTAINER_multihashmap_size(handle->active_requests));
- if (handle->th != NULL)
- {
- GNUNET_CLIENT_notify_transmit_ready_cancel (handle->th);
- handle->th = NULL;
- }
+ struct GNUNET_DHT_PutHandle *ph;
+
+ GNUNET_assert (NULL != handle);
+ GNUNET_assert (0 ==
+ GNUNET_CONTAINER_multihashmap_size (handle->active_requests));
+ if (NULL != handle->th)
+ {
+ GNUNET_CLIENT_notify_transmit_ready_cancel (handle->th);
+ handle->th = NULL;
+ }
while (NULL != (pm = handle->pending_head))
- {
- GNUNET_CONTAINER_DLL_remove (handle->pending_head,
- handle->pending_tail,
- pm);
- GNUNET_assert (GNUNET_YES == pm->free_on_send);
- if (GNUNET_SCHEDULER_NO_TASK != pm->timeout_task)
- GNUNET_SCHEDULER_cancel (pm->timeout_task);
- if (NULL != pm->cont)
- GNUNET_SCHEDULER_add_continuation (pm->cont,
- pm->cont_cls,
- GNUNET_SCHEDULER_REASON_TIMEOUT);
- pm->in_pending_queue = GNUNET_NO;
- GNUNET_free (pm);
- }
- if (handle->client != NULL)
- {
- GNUNET_CLIENT_disconnect (handle->client, GNUNET_YES);
- handle->client = NULL;
- }
- if (handle->reconnect_task != GNUNET_SCHEDULER_NO_TASK)
- GNUNET_SCHEDULER_cancel(handle->reconnect_task);
- GNUNET_CONTAINER_multihashmap_destroy(handle->active_requests);
+ {
+ GNUNET_assert (GNUNET_YES == pm->in_pending_queue);
+ GNUNET_CONTAINER_DLL_remove (handle->pending_head, handle->pending_tail,
+ pm);
+ pm->in_pending_queue = GNUNET_NO;
+ GNUNET_assert (GNUNET_YES == pm->free_on_send);
+ if (NULL != pm->cont)
+ pm->cont (pm->cont_cls, NULL);
+ GNUNET_free (pm);
+ }
+ while (NULL != (ph = handle->put_head))
+ {
+ GNUNET_break (NULL == ph->pending);
+ if (NULL != ph->cont)
+ ph->cont (ph->cont_cls, GNUNET_SYSERR);
+ GNUNET_DHT_put_cancel (ph);
+ }
+
+ if (NULL != handle->client)
+ {
+ GNUNET_CLIENT_disconnect (handle->client);
+ handle->client = NULL;
+ }
+ if (GNUNET_SCHEDULER_NO_TASK != handle->reconnect_task)
+ GNUNET_SCHEDULER_cancel (handle->reconnect_task);
+ GNUNET_CONTAINER_multihashmap_destroy (handle->active_requests);
GNUNET_free (handle);
}
-
-
-/* ***** Special low-level API providing generic routing abstraction ***** */
-
-
/**
* Timeout for the transmission of a fire&forget-request. Clean it up.
*
* @param tc scheduler context
*/
static void
-timeout_route_request (void *cls,
+timeout_put_request (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_DHT_PutHandle *ph = cls;
+ struct GNUNET_DHT_Handle *handle = ph->dht_handle;
+
+ ph->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ if (NULL != ph->pending)
+ {
+ GNUNET_CONTAINER_DLL_remove (handle->pending_head, handle->pending_tail,
+ ph->pending);
+ ph->pending->in_pending_queue = GNUNET_NO;
+ GNUNET_free (ph->pending);
+ }
+ if (NULL != ph->cont)
+ ph->cont (ph->cont_cls, GNUNET_NO);
+ GNUNET_CONTAINER_DLL_remove (handle->put_head,
+ handle->put_tail,
+ ph);
+ GNUNET_free (ph);
+}
+
+
+/**
+ * Function called whenever the PUT message leaves the queue. Sets
+ * the message pointer in the put handle to NULL.
+ *
+ * @param cls the 'struct GNUNET_DHT_PutHandle'
+ * @param tc unused
+ */
+static void
+mark_put_message_gone (void *cls,
const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct PendingMessage *pending = cls;
- struct GNUNET_DHT_Handle *handle;
+ struct GNUNET_DHT_PutHandle *ph = cls;
- if (pending->free_on_send != GNUNET_YES)
- {
- /* timeouts should only apply to fire & forget requests! */
- GNUNET_break (0);
- return;
- }
- handle = pending->handle;
- GNUNET_CONTAINER_DLL_remove (handle->pending_head,
- handle->pending_tail,
- pending);
- if (pending->cont != NULL)
- pending->cont (pending->cont_cls,
- tc);
- GNUNET_free (pending);
+ ph->pending = NULL;
}
/**
- * Initiate a generic DHT route operation.
+ * Perform a PUT operation storing data in the DHT. FIXME: we should
+ * change the protocol to get a confirmation for the PUT from the DHT
+ * and call 'cont' only after getting the confirmation; otherwise, the
+ * client has no good way of telling if the 'PUT' message actually got
+ * to the DHT service!
*
- * @param handle handle to the DHT service
- * @param key the key to look up
- * @param desired_replication_level how many peers should ultimately receive
- * this message (advisory only, target may be too high for the
- * given DHT or not hit exactly).
- * @param options options for routing
- * @param enc send the encapsulated message to a peer close to the key
- * @param iter function to call on each result, NULL if no replies are expected
- * @param iter_cls closure for iter
- * @param timeout when to abort with an error if we fail to get
- * a confirmation for the request (when necessary) or how long
- * to wait for tramission to the service; only applies
- * if 'iter' is NULL
- * @param cont continuation to call when the request has been transmitted
- * the first time to the service
+ * @param handle handle to DHT service
+ * @param key the key to store under
+ * @param desired_replication_level estimate of how many
+ * nearest peers this request should reach
+ * @param options routing options for this message
+ * @param type type of the value
+ * @param size number of bytes in data; must be less than 64k
+ * @param data the data to store
+ * @param exp desired expiration time for the value
+ * @param timeout how long to wait for transmission of this request
+ * @param cont continuation to call when done (transmitting request to service)
+ * You must not call GNUNET_DHT_DISCONNECT in this continuation
* @param cont_cls closure for cont
- * @return handle to stop the request, NULL if the request is "fire and forget"
*/
-struct GNUNET_DHT_RouteHandle *
-GNUNET_DHT_route_start (struct GNUNET_DHT_Handle *handle,
- const GNUNET_HashCode *key,
- uint32_t desired_replication_level,
- enum GNUNET_DHT_RouteOption options,
- const struct GNUNET_MessageHeader *enc,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_DHT_ReplyProcessor iter,
- void *iter_cls,
- GNUNET_SCHEDULER_Task cont,
- void *cont_cls)
+struct GNUNET_DHT_PutHandle *
+GNUNET_DHT_put (struct GNUNET_DHT_Handle *handle, const struct GNUNET_HashCode * key,
+ uint32_t desired_replication_level,
+ enum GNUNET_DHT_RouteOption options,
+ enum GNUNET_BLOCK_Type type, size_t size, const char *data,
+ struct GNUNET_TIME_Absolute exp,
+ struct GNUNET_TIME_Relative timeout, GNUNET_DHT_PutContinuation cont,
+ void *cont_cls)
{
+ struct GNUNET_DHT_ClientPutMessage *put_msg;
+ size_t msize;
struct PendingMessage *pending;
- struct GNUNET_DHT_RouteMessage *message;
- struct GNUNET_DHT_RouteHandle *route_handle;
- uint16_t msize;
- uint16_t esize;
-
- esize = ntohs (enc->size);
- if (sizeof (struct GNUNET_DHT_RouteMessage) + esize >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
- {
- GNUNET_break (0);
- return NULL;
- }
- msize = sizeof (struct GNUNET_DHT_RouteMessage) + esize;
+ struct GNUNET_DHT_PutHandle *ph;
+
+ msize = sizeof (struct GNUNET_DHT_ClientPutMessage) + size;
+ if ((msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
+ (size >= GNUNET_SERVER_MAX_MESSAGE_SIZE))
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ ph = GNUNET_malloc (sizeof (struct GNUNET_DHT_PutHandle));
+ ph->dht_handle = handle;
+ ph->timeout_task = GNUNET_SCHEDULER_add_delayed (timeout, &timeout_put_request, ph);
+ ph->cont = cont;
+ ph->cont_cls = cont_cls;
+ ph->unique_id = ++handle->uid_gen;
pending = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
- message = (struct GNUNET_DHT_RouteMessage*) &pending[1];
- pending->msg = &message->header;
+ ph->pending = pending;
+ put_msg = (struct GNUNET_DHT_ClientPutMessage *) &pending[1];
+ pending->msg = &put_msg->header;
pending->handle = handle;
- pending->cont = cont;
- pending->cont_cls = cont_cls;
-
- message->header.size = htons (msize);
- message->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_LOCAL_ROUTE);
- message->key = *key;
- message->options = htonl ((uint32_t) options);
- message->desired_replication_level = htonl (desired_replication_level);
- handle->uid_gen++;
- message->unique_id = GNUNET_htonll (handle->uid_gen);
- memcpy (&message[1], enc, esize);
-
- if (iter != NULL)
- {
- route_handle = GNUNET_malloc (sizeof (struct GNUNET_DHT_RouteHandle));
- route_handle->key = *key;
- route_handle->iter = iter;
- route_handle->iter_cls = iter_cls;
- route_handle->dht_handle = handle;
- route_handle->uid = handle->uid_gen;
- route_handle->message = pending;
- GNUNET_CONTAINER_multihashmap_put (handle->active_requests,
- key,
- route_handle,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
- }
- else
- {
- route_handle = NULL;
- pending->free_on_send = GNUNET_YES;
- pending->timeout_task = GNUNET_SCHEDULER_add_delayed (timeout,
- &timeout_route_request,
- pending);
- }
- GNUNET_CONTAINER_DLL_insert (handle->pending_head,
- handle->pending_tail,
- pending);
+ pending->cont = &mark_put_message_gone;
+ pending->cont_cls = ph;
+ pending->free_on_send = GNUNET_YES;
+ put_msg->header.size = htons (msize);
+ put_msg->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_CLIENT_PUT);
+ put_msg->type = htonl (type);
+ put_msg->options = htonl ((uint32_t) options);
+ put_msg->desired_replication_level = htonl (desired_replication_level);
+ put_msg->unique_id = ph->unique_id;
+ put_msg->expiration = GNUNET_TIME_absolute_hton (exp);
+ put_msg->key = *key;
+ memcpy (&put_msg[1], data, size);
+ GNUNET_CONTAINER_DLL_insert (handle->pending_head, handle->pending_tail,
+ pending);
pending->in_pending_queue = GNUNET_YES;
+ GNUNET_CONTAINER_DLL_insert_tail (handle->put_head,
+ handle->put_tail,
+ ph);
process_pending_messages (handle);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "DHT route start request processed, returning %p\n",
- route_handle);
- return route_handle;
+ return ph;
}
/**
- * Stop a previously issued routing request
+ * Cancels a DHT PUT operation. Note that the PUT request may still
+ * go out over the network (we can't stop that); However, if the PUT
+ * has not yet been sent to the service, cancelling the PUT will stop
+ * this from happening (but there is no way for the user of this API
+ * to tell if that is the case). The only use for this API is to
+ * prevent a later call to 'cont' from "GNUNET_DHT_put" (i.e. because
+ * the system is shutting down).
*
- * @param route_handle handle to the request to stop
+ * @param ph put operation to cancel ('cont' will no longer be called)
*/
void
-GNUNET_DHT_route_stop (struct GNUNET_DHT_RouteHandle *route_handle)
+GNUNET_DHT_put_cancel (struct GNUNET_DHT_PutHandle *ph)
{
- struct GNUNET_DHT_Handle *handle;
- struct PendingMessage *pending;
- struct GNUNET_DHT_StopMessage *message;
- size_t msize;
-
- handle = route_handle->dht_handle;
- if (GNUNET_NO == route_handle->message->in_pending_queue)
- {
- /* need to send stop message */
- msize = sizeof (struct GNUNET_DHT_StopMessage);
- pending = GNUNET_malloc (sizeof (struct PendingMessage) +
- msize);
- message = (struct GNUNET_DHT_StopMessage*) &pending[1];
- pending->msg = &message->header;
- message->header.size = htons (msize);
- message->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_LOCAL_ROUTE_STOP);
- message->unique_id = GNUNET_htonll (route_handle->uid);
- message->key = route_handle->key;
- pending->handle = handle;
- pending->free_on_send = GNUNET_YES;
- pending->in_pending_queue = GNUNET_YES;
- GNUNET_CONTAINER_DLL_insert (handle->pending_head,
- handle->pending_tail,
- pending);
- process_pending_messages (handle);
- }
- else
- {
- /* simply remove pending request from message queue before
- transmission, no need to transmit STOP request! */
- GNUNET_CONTAINER_DLL_remove (handle->pending_head,
- handle->pending_tail,
- route_handle->message);
- }
- GNUNET_assert (GNUNET_YES ==
- GNUNET_CONTAINER_multihashmap_remove (route_handle->dht_handle->active_requests,
- &route_handle->key,
- route_handle));
- GNUNET_free(route_handle->message);
- GNUNET_free(route_handle);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "DHT route stop request processed\n");
+ struct GNUNET_DHT_Handle *handle = ph->dht_handle;
+
+ if (NULL != ph->pending)
+ {
+ GNUNET_CONTAINER_DLL_remove (handle->pending_head,
+ handle->pending_tail,
+ ph->pending);
+ GNUNET_free (ph->pending);
+ ph->pending = NULL;
+ }
+ if (ph->timeout_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (ph->timeout_task);
+ ph->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ GNUNET_CONTAINER_DLL_remove (handle->put_head,
+ handle->put_tail,
+ ph);
+ GNUNET_free (ph);
}
-
-/* ***** Special API for controlling DHT routing maintenance ******* */
-
-
/**
- * Send a control message to the DHT.
+ * Perform an asynchronous GET operation on the DHT identified. See
+ * also "GNUNET_BLOCK_evaluate".
*
* @param handle handle to the DHT service
- * @param command command
- * @param variable variable to the command
- * @param cont continuation to call when done (transmitting request to service)
- * @param cont_cls closure for cont
+ * @param type expected type of the response object
+ * @param key the key to look up
+ * @param desired_replication_level estimate of how many
+ nearest peers this request should reach
+ * @param options routing options for this message
+ * @param xquery extended query data (can be NULL, depending on type)
+ * @param xquery_size number of bytes in xquery
+ * @param iter function to call on each result
+ * @param iter_cls closure for iter
+ * @return handle to stop the async get
*/
-static void
-send_control_message (struct GNUNET_DHT_Handle *handle,
- uint16_t command,
- uint16_t variable,
- GNUNET_SCHEDULER_Task cont,
- void *cont_cls)
+struct GNUNET_DHT_GetHandle *
+GNUNET_DHT_get_start (struct GNUNET_DHT_Handle *handle,
+ enum GNUNET_BLOCK_Type type, const struct GNUNET_HashCode * key,
+ uint32_t desired_replication_level,
+ enum GNUNET_DHT_RouteOption options, const void *xquery,
+ size_t xquery_size, GNUNET_DHT_GetIterator iter,
+ void *iter_cls)
{
- struct GNUNET_DHT_ControlMessage *msg;
+ struct GNUNET_DHT_ClientGetMessage *get_msg;
+ struct GNUNET_DHT_GetHandle *get_handle;
+ size_t msize;
struct PendingMessage *pending;
- pending = GNUNET_malloc (sizeof (struct PendingMessage) +
- sizeof(struct GNUNET_DHT_ControlMessage));
- msg = (struct GNUNET_DHT_ControlMessage*) &pending[1];
- pending->msg = &msg->header;
- msg->header.size = htons (sizeof(struct GNUNET_DHT_ControlMessage));
- msg->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_CONTROL);
- msg->command = htons (command);
- msg->variable = htons (variable);
- pending->free_on_send = GNUNET_YES;
- pending->cont = cont;
- pending->cont_cls = cont_cls;
- pending->in_pending_queue = GNUNET_YES;
- GNUNET_CONTAINER_DLL_insert (handle->pending_head,
- handle->pending_tail,
- pending);
+ msize = sizeof (struct GNUNET_DHT_ClientGetMessage) + xquery_size;
+ if ((msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
+ (xquery_size >= GNUNET_SERVER_MAX_MESSAGE_SIZE))
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Sending query for %s to DHT %p\n",
+ GNUNET_h2s (key), handle);
+ pending = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
+ get_msg = (struct GNUNET_DHT_ClientGetMessage *) &pending[1];
+ pending->msg = &get_msg->header;
+ pending->handle = handle;
+ pending->free_on_send = GNUNET_NO;
+ get_msg->header.size = htons (msize);
+ get_msg->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET);
+ get_msg->options = htonl ((uint32_t) options);
+ get_msg->desired_replication_level = htonl (desired_replication_level);
+ get_msg->type = htonl (type);
+ get_msg->key = *key;
+ get_msg->unique_id = ++handle->uid_gen;
+ memcpy (&get_msg[1], xquery, xquery_size);
+ GNUNET_CONTAINER_DLL_insert (handle->pending_head, handle->pending_tail,
+ pending);
+ pending->in_pending_queue = GNUNET_YES;
+ get_handle = GNUNET_malloc (sizeof (struct GNUNET_DHT_GetHandle));
+ get_handle->iter = iter;
+ get_handle->iter_cls = iter_cls;
+ get_handle->message = pending;
+ get_handle->unique_id = get_msg->unique_id;
+ GNUNET_CONTAINER_multihashmap_put (handle->active_requests, key, get_handle,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
process_pending_messages (handle);
+ return get_handle;
}
/**
- * Send a message to the DHT telling it to issue a single find
- * peer request using the peers unique identifier as key. This
- * is used to fill the routing table, and is normally controlled
- * by the DHT itself. However, for testing and perhaps more
- * close control over the DHT, this can be explicitly managed.
+ * Stop async DHT-get.
*
- * @param handle handle to the DHT service
- * @param cont continuation to call when done (transmitting request to service)
- * @param cont_cls closure for cont
+ * @param get_handle handle to the GET operation to stop
*/
void
-GNUNET_DHT_find_peers (struct GNUNET_DHT_Handle *handle,
- GNUNET_SCHEDULER_Task cont,
- void *cont_cls)
+GNUNET_DHT_get_stop (struct GNUNET_DHT_GetHandle *get_handle)
{
- send_control_message (handle,
- GNUNET_MESSAGE_TYPE_DHT_FIND_PEER, 0,
- cont, cont_cls);
-}
-
+ struct GNUNET_DHT_Handle *handle;
+ const struct GNUNET_DHT_ClientGetMessage *get_msg;
+ struct GNUNET_DHT_ClientGetStopMessage *stop_msg;
+ struct PendingMessage *pending;
+ handle = get_handle->message->handle;
+ get_msg =
+ (const struct GNUNET_DHT_ClientGetMessage *) get_handle->message->msg;
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Sending STOP for %s to DHT via %p\n",
+ GNUNET_h2s (&get_msg->key), handle);
+ /* generate STOP */
+ pending =
+ GNUNET_malloc (sizeof (struct PendingMessage) +
+ sizeof (struct GNUNET_DHT_ClientGetStopMessage));
+ stop_msg = (struct GNUNET_DHT_ClientGetStopMessage *) &pending[1];
+ pending->msg = &stop_msg->header;
+ pending->handle = handle;
+ pending->free_on_send = GNUNET_YES;
+ stop_msg->header.size =
+ htons (sizeof (struct GNUNET_DHT_ClientGetStopMessage));
+ stop_msg->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET_STOP);
+ stop_msg->reserved = htonl (0);
+ stop_msg->unique_id = get_msg->unique_id;
+ stop_msg->key = get_msg->key;
+ GNUNET_CONTAINER_DLL_insert (handle->pending_head, handle->pending_tail,
+ pending);
+ pending->in_pending_queue = GNUNET_YES;
-#if HAVE_MALICIOUS
+ /* remove 'GET' from active status */
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_remove (handle->active_requests,
+ &get_msg->key,
+ get_handle));
+ if (GNUNET_YES == get_handle->message->in_pending_queue)
+ {
+ GNUNET_CONTAINER_DLL_remove (handle->pending_head, handle->pending_tail,
+ get_handle->message);
+ get_handle->message->in_pending_queue = GNUNET_NO;
+ }
+ GNUNET_free (get_handle->message);
+ GNUNET_free (get_handle);
-/**
- * Send a message to the DHT telling it to start issuing random GET
- * requests every 'frequency' milliseconds.
- *
- * @param handle handle to the DHT service
- * @param frequency delay between sending malicious messages
- */
-void
-GNUNET_DHT_set_malicious_getter (struct GNUNET_DHT_Handle *handle,
- struct GNUNET_TIME_Relative frequency)
-{
- if (frequency.rel_value > UINT16_MAX)
- {
- GNUNET_break (0);
- return;
- }
- send_control_message (handle,
- GNUNET_MESSAGE_TYPE_DHT_MALICIOUS_GET, frequency.rel_value,
- NULL, NULL);
+ process_pending_messages (handle);
}
+
/**
- * Send a message to the DHT telling it to start issuing random PUT
- * requests every 'frequency' milliseconds.
+ * Start monitoring the local DHT service.
*
- * @param handle handle to the DHT service
- * @param frequency delay between sending malicious messages
+ * @param handle Handle to the DHT service.
+ * @param type Type of blocks that are of interest.
+ * @param key Key of data of interest, NULL for all.
+ * @param get_cb Callback to process monitored get messages.
+ * @param get_resp_cb Callback to process monitored get response messages.
+ * @param put_cb Callback to process monitored put messages.
+ * @param cb_cls Closure for cb.
+ *
+ * @return Handle to stop monitoring.
*/
-void
-GNUNET_DHT_set_malicious_putter (struct GNUNET_DHT_Handle *handle,
- struct GNUNET_TIME_Relative frequency)
+struct GNUNET_DHT_MonitorHandle *
+GNUNET_DHT_monitor_start (struct GNUNET_DHT_Handle *handle,
+ enum GNUNET_BLOCK_Type type,
+ const struct GNUNET_HashCode *key,
+ GNUNET_DHT_MonitorGetCB get_cb,
+ GNUNET_DHT_MonitorGetRespCB get_resp_cb,
+ GNUNET_DHT_MonitorPutCB put_cb,
+ void *cb_cls)
{
- if (frequency.rel_value > UINT16_MAX)
- {
- GNUNET_break (0);
- return;
- }
+ struct GNUNET_DHT_MonitorHandle *h;
+ struct GNUNET_DHT_MonitorStartStopMessage *m;
+ struct PendingMessage *pending;
+
+ h = GNUNET_malloc (sizeof (struct GNUNET_DHT_MonitorHandle));
+ GNUNET_CONTAINER_DLL_insert(handle->monitor_head, handle->monitor_tail, h);
+
+ h->get_cb = get_cb;
+ h->get_resp_cb = get_resp_cb;
+ h->put_cb = put_cb;
+ h->cb_cls = cb_cls;
+ h->type = type;
+ h->dht_handle = handle;
+ if (NULL != key)
+ {
+ h->key = GNUNET_malloc (sizeof(struct GNUNET_HashCode));
+ memcpy (h->key, key, sizeof(struct GNUNET_HashCode));
+ }
+
+ pending = GNUNET_malloc (sizeof (struct GNUNET_DHT_MonitorStartStopMessage) +
+ sizeof (struct PendingMessage));
+ m = (struct GNUNET_DHT_MonitorStartStopMessage *) &pending[1];
+ pending->msg = &m->header;
+ pending->handle = handle;
+ pending->free_on_send = GNUNET_YES;
+ m->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_MONITOR_START);
+ m->header.size = htons (sizeof (struct GNUNET_DHT_MonitorStartStopMessage));
+ m->type = htonl(type);
+ m->get = htons(NULL != get_cb);
+ m->get_resp = htons(NULL != get_resp_cb);
+ m->put = htons(NULL != put_cb);
+ if (NULL != key) {
+ m->filter_key = htons(1);
+ memcpy (&m->key, key, sizeof(struct GNUNET_HashCode));
+ }
+ GNUNET_CONTAINER_DLL_insert (handle->pending_head, handle->pending_tail,
+ pending);
+ pending->in_pending_queue = GNUNET_YES;
+ process_pending_messages (handle);
- send_control_message (handle,
- GNUNET_MESSAGE_TYPE_DHT_MALICIOUS_PUT, frequency.rel_value,
- NULL, NULL);
+ return h;
}
/**
- * Send a message to the DHT telling it to start dropping
- * all requests received.
+ * Stop monitoring.
*
- * @param handle handle to the DHT service
+ * @param handle The handle to the monitor request returned by monitor_start.
+ *
+ * On return get_handle will no longer be valid, caller must not use again!!!
*/
-void
-GNUNET_DHT_set_malicious_dropper (struct GNUNET_DHT_Handle *handle)
+void
+GNUNET_DHT_monitor_stop (struct GNUNET_DHT_MonitorHandle *handle)
{
- send_control_message (handle,
- GNUNET_MESSAGE_TYPE_DHT_MALICIOUS_DROP, 0,
- NULL, NULL);
+ struct GNUNET_DHT_MonitorStartStopMessage *m;
+ struct PendingMessage *pending;
+
+ GNUNET_CONTAINER_DLL_remove (handle->dht_handle->monitor_head,
+ handle->dht_handle->monitor_tail,
+ handle);
+
+ pending = GNUNET_malloc (sizeof (struct GNUNET_DHT_MonitorStartStopMessage) +
+ sizeof (struct PendingMessage));
+ m = (struct GNUNET_DHT_MonitorStartStopMessage *) &pending[1];
+ pending->msg = &m->header;
+ pending->handle = handle->dht_handle;
+ pending->free_on_send = GNUNET_YES;
+ m->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_MONITOR_STOP);
+ m->header.size = htons (sizeof (struct GNUNET_DHT_MonitorStartStopMessage));
+ m->type = htonl(handle->type);
+ m->get = htons(NULL != handle->get_cb);
+ m->get_resp = htons(NULL != handle->get_resp_cb);
+ m->put = htons(NULL != handle->put_cb);
+ if (NULL != handle->key) {
+ m->filter_key = htons(1);
+ memcpy (&m->key, handle->key, sizeof(struct GNUNET_HashCode));
+ }
+ GNUNET_CONTAINER_DLL_insert (handle->dht_handle->pending_head,
+ handle->dht_handle->pending_tail,
+ pending);
+ pending->in_pending_queue = GNUNET_YES;
+ process_pending_messages (handle->dht_handle);
+
+ GNUNET_free_non_null (handle->key);
+ GNUNET_free (handle);
}
-#endif
+
/* end of dht_api.c */
projects / oweals / gnunet.git / blobdiff