gnunet-service-dht.h File Reference

GNUnet DHT globals. More...

#include "gnunet_util_lib.h"
#include "gnunet_statistics_service.h"
#include "gnunet_transport_service.h"
#include "gnunet_block_lib.h"

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Macros
#define	DEBUG_DHT   GNUNET_EXTRA_LOGGING

Functions
void	GDS_CLIENTS_handle_reply (struct GNUNET_TIME_Absolute expiration, const struct GNUNET_HashCode *key, unsigned int get_path_length, const struct GNUNET_PeerIdentity *get_path, unsigned int put_path_length, const struct GNUNET_PeerIdentity *put_path, enum GNUNET_BLOCK_Type type, size_t data_size, const void *data)
	Handle a reply we've received from another peer. More...
void	GDS_CLIENTS_process_get (uint32_t options, enum GNUNET_BLOCK_Type type, uint32_t hop_count, uint32_t desired_replication_level, unsigned int path_length, const struct GNUNET_PeerIdentity *path, const struct GNUNET_HashCode *key)
	Check if some client is monitoring GET messages and notify them in that case. More...
void	GDS_CLIENTS_process_get_resp (enum GNUNET_BLOCK_Type type, const struct GNUNET_PeerIdentity *get_path, unsigned int get_path_length, const struct GNUNET_PeerIdentity *put_path, unsigned int put_path_length, struct GNUNET_TIME_Absolute exp, const struct GNUNET_HashCode *key, const void *data, size_t size)
	Check if some client is monitoring GET RESP messages and notify them in that case. More...
void	GDS_CLIENTS_process_put (uint32_t options, enum GNUNET_BLOCK_Type type, uint32_t hop_count, uint32_t desired_replication_level, unsigned int path_length, const struct GNUNET_PeerIdentity *path, struct GNUNET_TIME_Absolute exp, const struct GNUNET_HashCode *key, const void *data, size_t size)
	Check if some client is monitoring PUT messages and notify them in that case. More...

Variables
const struct GNUNET_CONFIGURATION_Handle *	GDS_cfg
	Configuration we use. More...
struct GNUNET_SERVICE_Handle *	GDS_service
	Handle for the service. More...
struct GNUNET_BLOCK_Context *	GDS_block_context
	Our handle to the BLOCK library. More...
struct GNUNET_STATISTICS_Handle *	GDS_stats
	Handle for the statistics service. More...
struct GNUNET_MessageHeader *	GDS_my_hello
	Our HELLO. More...

Detailed Description

GNUnet DHT globals.

Author

Christian Grothoff

Definition in file gnunet-service-dht.h.

Macro Definition Documentation

DEBUG_DHT

#define DEBUG_DHT   GNUNET_EXTRA_LOGGING

Definition at line 34 of file gnunet-service-dht.h.

Function Documentation

GDS_CLIENTS_handle_reply()

void GDS_CLIENTS_handle_reply	(	struct GNUNET_TIME_Absolute	expiration,
		const struct GNUNET_HashCode *	key,
		unsigned int	get_path_length,
		const struct GNUNET_PeerIdentity *	get_path,
		unsigned int	put_path_length,
		const struct GNUNET_PeerIdentity *	put_path,
		enum GNUNET_BLOCK_Type	type,
		size_t	data_size,
		const void *	data
	)

Handle a reply we've received from another peer.

If the reply matches any of our pending queries, forward it to the respective client(s).

Parameters

expiration	when will the reply expire
key	the query this reply is for
get_path_length	number of peers in get_path
get_path	path the reply took on get
put_path_length	number of peers in put_path
put_path	path the reply took on put
type	type of the reply
data_size	number of bytes in data
data	application payload data

Definition at line 1146 of file gnunet-service-dht_clients.c.

References data, ForwardReplyContext::data, data_size, ForwardReplyContext::data_size, expiration, ForwardReplyContext::expiration, forward_reply(), ForwardReplyContext::get_path, ForwardReplyContext::get_path_length, gettext_noop, GNUNET_break, GNUNET_CONTAINER_multihashmap_get(), GNUNET_CONTAINER_multihashmap_get_multiple(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_MAX_MESSAGE_SIZE, GNUNET_NO, GNUNET_STATISTICS_update(), LOG, ForwardReplyContext::put_path, ForwardReplyContext::put_path_length, ClientQueryRecord::type, and ForwardReplyContext::type.

Referenced by handle_dht_local_put(), handle_dht_p2p_put(), handle_local_result(), and process_reply_with_path().

{
  struct ForwardReplyContext frc;
  size_t msize;

  msize = sizeof (struct GNUNET_DHT_ClientResultMessage) + data_size +
    (get_path_length + put_path_length) * sizeof (struct GNUNET_PeerIdentity);
  if (msize >= GNUNET_MAX_MESSAGE_SIZE)
  {
    GNUNET_break (0);
    return;
  }
  if (NULL == GNUNET_CONTAINER_multihashmap_get (forward_map,
                                                 key))
  {
    LOG (GNUNET_ERROR_TYPE_DEBUG,
         "No matching client for reply for key %s\n",
         GNUNET_h2s (key));
    GNUNET_STATISTICS_update (GDS_stats,
                              gettext_noop ("# REPLIES ignored for CLIENTS (no match)"),
                              1,
                              GNUNET_NO);
    return;                     /* no matching request, fast exit! */
  }
  frc.expiration = expiration;
  frc.get_path = get_path;
  frc.put_path = put_path;
  frc.data = data;
  frc.data_size = data_size;
  frc.get_path_length = get_path_length;
  frc.put_path_length = put_path_length;
  frc.type = type;
  LOG (GNUNET_ERROR_TYPE_DEBUG,
       "Forwarding reply for key %s to client\n",
       GNUNET_h2s (key));
  GNUNET_CONTAINER_multihashmap_get_multiple (forward_map,
                                              key,
                                              &forward_reply,
                                              &frc);

}

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GDS_CLIENTS_process_get()

void GDS_CLIENTS_process_get	(	uint32_t	options,
		enum GNUNET_BLOCK_Type	type,
		uint32_t	hop_count,
		uint32_t	desired_replication_level,
		unsigned int	path_length,
		const struct GNUNET_PeerIdentity *	path,
		const struct GNUNET_HashCode *	key
	)

Check if some client is monitoring GET messages and notify them in that case.

Parameters

options	Options, for instance RecordRoute, DemultiplexEverywhere.
type	The type of data in the request.
hop_count	Hop count so far.
path_length	number of entries in path (or 0 if not recorded).
path	peers on the GET path (or NULL if not recorded).
desired_replication_level	Desired replication level.
key	Key of the requested data.

Definition at line 1210 of file gnunet-service-dht_clients.c.

References ClientMonitorRecord::ch, GNUNET_DHT_MonitorGetMessage::desired_replication_level, env, GNUNET_DHT_MonitorGetMessage::get_path_length, GNUNET_array_append, GNUNET_BLOCK_TYPE_ANY, GNUNET_free_non_null, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_DHT_MONITOR_GET, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_DHT_MonitorGetMessage::hop_count, ClientMonitorRecord::key, GNUNET_DHT_MonitorGetMessage::key, ClientQueryRecord::key, m, ClientHandle::mq, ClientMonitorRecord::next, GNUNET_DHT_MonitorGetMessage::options, ClientMonitorRecord::type, and GNUNET_DHT_MonitorGetMessage::type.

Referenced by handle_dht_local_get(), and handle_dht_p2p_get().

{
  struct ClientMonitorRecord *m;
  struct ClientHandle **cl;
  unsigned int cl_size;

  cl = NULL;
  cl_size = 0;
  for (m = monitor_head; NULL != m; m = m->next)
  {
    if ( ( (GNUNET_BLOCK_TYPE_ANY == m->type) ||
           (m->type == type) ) &&
         ( (NULL == m->key) ||
           (0 == memcmp (key,
                         m->key,
                         sizeof(struct GNUNET_HashCode))) ) )
    {
      struct GNUNET_MQ_Envelope *env;
      struct GNUNET_DHT_MonitorGetMessage *mmsg;
      struct GNUNET_PeerIdentity *msg_path;
      size_t msize;
      unsigned int i;

      /* Don't send duplicates */
      for (i = 0; i < cl_size; i++)
        if (cl[i] == m->ch)
          break;
      if (i < cl_size)
        continue;
      GNUNET_array_append (cl,
                           cl_size,
                           m->ch);

      msize = path_length * sizeof (struct GNUNET_PeerIdentity);
      env = GNUNET_MQ_msg_extra (mmsg,
                                 msize,
                                 GNUNET_MESSAGE_TYPE_DHT_MONITOR_GET);
      mmsg->options = htonl(options);
      mmsg->type = htonl(type);
      mmsg->hop_count = htonl(hop_count);
      mmsg->desired_replication_level = htonl(desired_replication_level);
      mmsg->get_path_length = htonl(path_length);
      mmsg->key = *key;
      msg_path = (struct GNUNET_PeerIdentity *) &mmsg[1];
      GNUNET_memcpy (msg_path,
                     path,
                     path_length * sizeof (struct GNUNET_PeerIdentity));
      GNUNET_MQ_send (m->ch->mq,
                      env);
    }
  }
  GNUNET_free_non_null (cl);
}

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GDS_CLIENTS_process_get_resp()

void GDS_CLIENTS_process_get_resp	(	enum GNUNET_BLOCK_Type	type,
		const struct GNUNET_PeerIdentity *	get_path,
		unsigned int	get_path_length,
		const struct GNUNET_PeerIdentity *	put_path,
		unsigned int	put_path_length,
		struct GNUNET_TIME_Absolute	exp,
		const struct GNUNET_HashCode *	key,
		const void *	data,
		size_t	size
	)

Check if some client is monitoring GET RESP messages and notify them in that case.

Parameters

type	The type of data in the result.
get_path	Peers on GET path (or NULL if not recorded).
get_path_length	number of entries in get_path.
put_path	peers on the PUT path (or NULL if not recorded).
put_path_length	number of entries in get_path.
exp	Expiration time of the data.
key	Key of the data.
data	Pointer to the result data.
size	Number of bytes in data.
type	The type of data in the result.
get_path	Peers on GET path (or NULL if not recorded).
get_path_length	number of entries in get_path.
put_path	peers on the PUT path (or NULL if not recorded).
put_path_length	number of entries in get_path.
exp	Expiration time of the data.
key	Key of the data.
data	Pointer to the result data.
size	Number of bytes in data.

Definition at line 1286 of file gnunet-service-dht_clients.c.

References ClientMonitorRecord::ch, env, GNUNET_DHT_MonitorGetRespMessage::expiration_time, GNUNET_DHT_MonitorGetRespMessage::get_path_length, GNUNET_array_append, GNUNET_BLOCK_TYPE_ANY, GNUNET_free_non_null, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_DHT_MONITOR_GET_RESP, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_TIME_absolute_hton(), ClientMonitorRecord::key, GNUNET_DHT_MonitorGetRespMessage::key, ClientQueryRecord::key, m, ClientHandle::mq, ClientMonitorRecord::next, GNUNET_DHT_MonitorGetRespMessage::put_path_length, size, ClientMonitorRecord::type, and GNUNET_DHT_MonitorGetRespMessage::type.

Referenced by process_reply_with_path().

{
  struct ClientMonitorRecord *m;
  struct ClientHandle **cl;
  unsigned int cl_size;

  cl = NULL;
  cl_size = 0;
  for (m = monitor_head; NULL != m; m = m->next)
  {
    if ((GNUNET_BLOCK_TYPE_ANY == m->type || m->type == type) &&
        (NULL == m->key ||
         memcmp (key, m->key, sizeof(struct GNUNET_HashCode)) == 0))
    {
      struct GNUNET_MQ_Envelope *env;
      struct GNUNET_DHT_MonitorGetRespMessage *mmsg;
      struct GNUNET_PeerIdentity *path;
      size_t msize;
      unsigned int i;

      /* Don't send duplicates */
      for (i = 0; i < cl_size; i++)
        if (cl[i] == m->ch)
          break;
      if (i < cl_size)
        continue;
      GNUNET_array_append (cl,
                           cl_size,
                           m->ch);

      msize = size;
      msize += (get_path_length + put_path_length)
               * sizeof (struct GNUNET_PeerIdentity);
      env = GNUNET_MQ_msg_extra (mmsg,
                                 msize,
                                 GNUNET_MESSAGE_TYPE_DHT_MONITOR_GET_RESP);
      mmsg->type = htonl(type);
      mmsg->put_path_length = htonl(put_path_length);
      mmsg->get_path_length = htonl(get_path_length);
      mmsg->expiration_time = GNUNET_TIME_absolute_hton(exp);
      mmsg->key = *key;
      path = (struct GNUNET_PeerIdentity *) &mmsg[1];
      GNUNET_memcpy (path,
                     put_path,
                     put_path_length * sizeof (struct GNUNET_PeerIdentity));
      GNUNET_memcpy (path,
                     get_path,
                     get_path_length * sizeof (struct GNUNET_PeerIdentity));
      GNUNET_memcpy (&path[get_path_length],
                     data,
                     size);
      GNUNET_MQ_send (m->ch->mq,
                      env);
    }
  }
  GNUNET_free_non_null (cl);
}

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GDS_CLIENTS_process_put()

void GDS_CLIENTS_process_put	(	uint32_t	options,
		enum GNUNET_BLOCK_Type	type,
		uint32_t	hop_count,
		uint32_t	desired_replication_level,
		unsigned int	path_length,
		const struct GNUNET_PeerIdentity *	path,
		struct GNUNET_TIME_Absolute	exp,
		const struct GNUNET_HashCode *	key,
		const void *	data,
		size_t	size
	)

Check if some client is monitoring PUT messages and notify them in that case.

Parameters

options	Options, for instance RecordRoute, DemultiplexEverywhere.
type	The type of data in the request.
hop_count	Hop count so far.
path_length	number of entries in path (or 0 if not recorded).
path	peers on the PUT path (or NULL if not recorded).
desired_replication_level	Desired replication level.
exp	Expiration time of the data.
key	Key under which data is to be stored.
data	Pointer to the data carried.
size	Number of bytes in data.

Definition at line 1369 of file gnunet-service-dht_clients.c.

References ClientMonitorRecord::ch, GNUNET_DHT_MonitorPutMessage::desired_replication_level, env, GNUNET_DHT_MonitorPutMessage::expiration_time, GNUNET_array_append, GNUNET_BLOCK_TYPE_ANY, GNUNET_free_non_null, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_DHT_MONITOR_PUT, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_TIME_absolute_hton(), GNUNET_DHT_MonitorPutMessage::hop_count, ClientMonitorRecord::key, GNUNET_DHT_MonitorPutMessage::key, ClientQueryRecord::key, m, ClientHandle::mq, ClientMonitorRecord::next, GNUNET_DHT_MonitorPutMessage::options, GNUNET_DHT_MonitorPutMessage::put_path_length, size, ClientMonitorRecord::type, and GNUNET_DHT_MonitorPutMessage::type.

Referenced by handle_dht_local_put(), and handle_dht_p2p_put().

{
  struct ClientMonitorRecord *m;
  struct ClientHandle **cl;
  unsigned int cl_size;

  cl = NULL;
  cl_size = 0;
  for (m = monitor_head; NULL != m; m = m->next)
  {
    if ((GNUNET_BLOCK_TYPE_ANY == m->type || m->type == type) &&
        (NULL == m->key ||
         memcmp (key, m->key, sizeof(struct GNUNET_HashCode)) == 0))
    {
      struct GNUNET_MQ_Envelope *env;
      struct GNUNET_DHT_MonitorPutMessage *mmsg;
      struct GNUNET_PeerIdentity *msg_path;
      size_t msize;
      unsigned int i;

      /* Don't send duplicates */
      for (i = 0; i < cl_size; i++)
        if (cl[i] == m->ch)
          break;
      if (i < cl_size)
        continue;
      GNUNET_array_append (cl,
                           cl_size,
                           m->ch);

      msize = size;
      msize += path_length * sizeof (struct GNUNET_PeerIdentity);
      env = GNUNET_MQ_msg_extra (mmsg,
                                 msize,
                                 GNUNET_MESSAGE_TYPE_DHT_MONITOR_PUT);
      mmsg->options = htonl(options);
      mmsg->type = htonl(type);
      mmsg->hop_count = htonl(hop_count);
      mmsg->desired_replication_level = htonl (desired_replication_level);
      mmsg->put_path_length = htonl (path_length);
      mmsg->key = *key;
      mmsg->expiration_time = GNUNET_TIME_absolute_hton (exp);
      msg_path = (struct GNUNET_PeerIdentity *) &mmsg[1];
      GNUNET_memcpy (msg_path,
                     path,
                     path_length * sizeof (struct GNUNET_PeerIdentity));
      GNUNET_memcpy (&msg_path[path_length],
                     data,
                     size);
      GNUNET_MQ_send (m->ch->mq,
                      env);
    }
  }
  GNUNET_free_non_null (cl);
}

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Variable Documentation

GDS_cfg

const struct GNUNET_CONFIGURATION_Handle* GDS_cfg

Configuration we use.

Configuration we use.

Definition at line 234 of file gnunet-service-dht_clients.c.

Referenced by GDS_DATACACHE_init(), GDS_HELLO_init(), GDS_NEIGHBOURS_init(), GDS_NSE_init(), run(), and try_connect().

GDS_service

struct GNUNET_SERVICE_Handle* GDS_service

Handle for the service.

Definition at line 229 of file gnunet-service-dht_clients.c.

Referenced by core_init(), and run().

GDS_block_context

struct GNUNET_BLOCK_Context* GDS_block_context

Our handle to the BLOCK library.

Definition at line 219 of file gnunet-service-dht_clients.c.

Referenced by datacache_get_iterator(), handle_dht_p2p_get(), handle_dht_p2p_put(), handle_find_peer(), process(), run(), send_find_peer_message(), and shutdown_task().

GDS_stats

struct GNUNET_STATISTICS_Handle* GDS_stats

Handle for the statistics service.

Definition at line 224 of file gnunet-service-dht_clients.c.

Referenced by datacache_get_iterator(), expire_oldest_entry(), GDS_DATACACHE_handle_get(), GDS_DATACACHE_handle_put(), GDS_NEIGHBOURS_handle_get(), GDS_NEIGHBOURS_handle_put(), GDS_NEIGHBOURS_handle_reply(), GDS_ROUTING_add(), get_forward_count(), handle_core_connect(), handle_core_disconnect(), handle_dht_p2p_get(), handle_dht_p2p_put(), handle_dht_p2p_result(), handle_find_peer(), process(), process_hello(), run(), select_peer(), send_find_peer_message(), shutdown_task(), and update_network_size_estimate().

GDS_my_hello

struct GNUNET_MessageHeader* GDS_my_hello

Our HELLO.

Definition at line 45 of file gnunet-service-dht.c.

Referenced by handle_find_peer().