--- /dev/null
+INCLUDES = -I$(top_srcdir)/src/include
+
+if MINGW
+ WINFLAGS = -Wl,--no-undefined -Wl,--export-all-symbols
+endif
+
+if USE_COVERAGE
+ AM_CFLAGS = --coverage -O0
+ XLIB = -lgcov
+endif
+
+plugindir = $(libdir)/gnunet
+
+lib_LTLIBRARIES = libgnunetdv.la
+
+plugin_LTLIBRARIES = libgnunet_plugin_transport_dv.la
+
+libgnunetdv_la_SOURCES = \
+ dv_api.c dv.h
+libgnunetdv_la_LIBADD = \
+ $(top_builddir)/src/util/libgnunetutil.la \
+ $(top_builddir)/src/core/libgnunetcore.la \
+ $(GN_LIBINTL) $(XLIB)
+libgnunetdv_la_LDFLAGS = \
+ $(GN_LIB_LDFLAGS) $(WINFLAGS) \
+ -version-info 0:0:0
+
+
+bin_PROGRAMS = \
+ gnunet-service-dv
+
+gnunet_service_dv_SOURCES = \
+ gnunet-service-dv.c
+gnunet_service_dv_LDADD = \
+ $(top_builddir)/src/dv/libgnunetdv.la \
+ $(top_builddir)/src/util/libgnunetutil.la \
+ $(GN_LIBINTL)
+
+libgnunet_plugin_transport_dv_la_SOURCES = \
+ plugin_transport_dv.c
+libgnunet_plugin_transport_dv_la_LIBADD = \
+ $(top_builddir)/src/hello/libgnunethello.la \
+ $(top_builddir)/src/dv/libgnunetdv.la \
+ $(top_builddir)/src/peerinfo/libgnunetpeerinfo.la \
+ $(top_builddir)/src/util/libgnunetutil.la
+libgnunet_plugin_transport_dv_la_LDFLAGS = \
+ $(GN_PLUGIN_LDFLAGS)
+
+
+#check_PROGRAMS = \
+# test_statistics_api
+
+TESTS = $(check_PROGRAMS) $(check_SCRIPTS)
+
+#test_statistics_api_SOURCES = \
+# test_statistics_api.c
+#test_statistics_api_LDADD = \
+# $(top_builddir)/src/statistics/libgnunetstatistics.la \
+# $(top_builddir)/src/util/libgnunetutil.la
+
+#EXTRA_DIST = \
+# test_statistics_api_data.conf
+
+#check_SCRIPTS = \
+# test_gnunet_statistics.sh
+
--- /dev/null
+/*
+ This file is part of GNUnet.
+ (C) 2001, 2002, 2003, 2004, 2009 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
+ by the Free Software Foundation; either version 2, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @author Christian Grothoff
+ * @author NOT Nathan Evans
+ * @file dv/dv.h
+ */
+#ifndef DV_H
+#define DV_H
+
+#include "gnunet_common.h"
+
+#define DEBUG_DV GNUNET_YES
+#define DEBUG_DV_API GNUNET_YES
+
+typedef void (*GNUNET_DV_MessageReceivedHandler) (void *cls,
+ struct GNUNET_PeerIdentity *sender,
+ struct GNUNET_MessageHeader *msg,
+ unsigned int distance,
+ char *sender_address,
+ size_t sender_address_len);
+
+/**
+ * DV Message, contains a message that was received
+ * via DV for this peer!
+ *
+ * Sender address is copied to the end of this struct.
+ */
+struct GNUNET_DV_MessageReceived
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_TRANSPORT_DV_MESSAGE
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * The sender of the message
+ */
+ struct GNUNET_PeerIdentity *sender;
+
+ /**
+ * The message that was sent
+ */
+ struct GNUNET_MessageHeader *msg;
+
+ /**
+ * The distance to the peer that we received the message from
+ */
+ size_t distance;
+
+ /**
+ * Length of the sender address, appended to end of this message
+ */
+ size_t sender_address_len;
+
+};
+
+
+/**
+ * DV Message, indicates that we have learned of a new DV level peer.
+ *
+ * Sender address is copied to the end of this struct.
+ */
+struct GNUNET_DV_ConnectMessage
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_TRANSPORT_DV_MESSAGE
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * The sender of the message
+ */
+ struct GNUNET_PeerIdentity *sender;
+
+ /**
+ * The message that was sent
+ */
+ struct GNUNET_MessageHeader *msg;
+
+ /**
+ * The distance to the peer that we received the message from
+ */
+ size_t distance;
+
+ /**
+ * Length of the sender address, appended to end of this message
+ */
+ size_t sender_address_len;
+
+};
+
+
+/**
+ * Message to send a message over DV via a specific peer
+ */
+struct GNUNET_DV_SendMessage
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_DV_SEND
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * Intended final recipient of this message
+ */
+ struct GNUNET_PeerIdentity target;
+
+ /**
+ * The message(s) to be sent.
+ */
+ char *msgbuf;
+
+ /**
+ * The size of the msgbuf
+ */
+ size_t msgbuf_size;
+
+ /**
+ * Message priority
+ */
+ size_t priority;
+
+ /**
+ * How long can we delay sending?
+ */
+ struct GNUNET_TIME_Relative timeout;
+
+ /**
+ * Size of the address (appended to end of struct)
+ */
+ size_t addrlen;
+
+ /*
+ * Sender, appended to end of struct tells via whom
+ * to send this message.
+ */
+
+};
+
+struct GNUNET_DV_Handle *
+GNUNET_DV_connect (struct GNUNET_SCHEDULER_Handle *sched,
+ const struct GNUNET_CONFIGURATION_Handle *cfg,
+ GNUNET_DV_MessageReceivedHandler receive_handler,
+ void *receive_handler_cls);
+
+#endif
--- /dev/null
+/*
+ This file is part of GNUnet.
+ (C) 2009, 2010 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
+ by the Free Software Foundation; either version 2, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file transport/dv_api.c
+ * @brief library to access the DV service
+ * @author Christian Grothoff
+ * @author Not Nathan Evans
+ */
+#include "platform.h"
+#include "gnunet_bandwidth_lib.h"
+#include "gnunet_client_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_dv_service.h"
+#include "dv.h"
+
+
+struct PendingMessages
+{
+ /**
+ * Linked list of pending messages
+ */
+ struct PendingMessages *next;
+
+ /**
+ * Message that is pending
+ */
+ struct GNUNET_DV_SendMessage *msg;
+
+ /**
+ * Timeout for this message
+ */
+ struct GNUNET_TIME_Absolute timeout;
+
+};
+
+/**
+ * Handle for the service.
+ */
+struct GNUNET_DV_Handle
+{
+ /**
+ * Our scheduler.
+ */
+ struct GNUNET_SCHEDULER_Handle *sched;
+
+ /**
+ * Configuration to use.
+ */
+ const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+ /**
+ * Socket (if available).
+ */
+ struct GNUNET_CLIENT_Connection *client;
+
+ /**
+ * Currently pending transmission request.
+ */
+ struct GNUNET_CLIENT_TransmitHandle *th;
+
+ /**
+ * List of the currently pending messages for the DV service.
+ */
+ struct PendingMessages *pending_list;
+
+ /**
+ * Message we are currently sending.
+ */
+ struct PendingMessages *current;
+
+ /**
+ * Kill off the connection and any pending messages.
+ */
+ int do_destroy;
+
+ /**
+ * Handler for messages we receive from the DV service
+ */
+ GNUNET_DV_MessageReceivedHandler receive_handler;
+
+ /**
+ * Closure for the receive handler
+ */
+ void *receive_cls;
+
+};
+
+
+/**
+ * Try to (re)connect to the dv service.
+ *
+ * @return GNUNET_YES on success, GNUNET_NO on failure.
+ */
+static int
+try_connect (struct GNUNET_DV_Handle *ret)
+{
+ if (ret->client != NULL)
+ return GNUNET_OK;
+ ret->client = GNUNET_CLIENT_connect (ret->sched, "dv", ret->cfg);
+ if (ret->client != NULL)
+ return GNUNET_YES;
+#if DEBUG_STATISTICS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ _("Failed to connect to the dv service!\n"));
+#endif
+ return GNUNET_NO;
+}
+
+static void process_pending_message(struct GNUNET_DV_Handle *handle);
+
+/**
+ * Send complete, schedule next
+ */
+static void
+finish (struct GNUNET_DV_Handle *handle, int code)
+{
+ struct PendingMessages *pos = handle->current;
+ handle->current = NULL;
+ process_pending_message (handle);
+
+ GNUNET_free (pos);
+}
+
+
+static size_t
+transmit_pending (void *cls, size_t size, void *buf)
+{
+ struct GNUNET_DV_Handle *handle = cls;
+ size_t ret;
+
+ if (buf == NULL)
+ {
+ finish(handle, GNUNET_SYSERR);
+ return 0;
+ }
+ handle->th = NULL;
+
+ return ret;
+}
+
+/**
+ * Try to send messages from list of messages to send
+ */
+static void process_pending_message(struct GNUNET_DV_Handle *handle)
+{
+ struct GNUNET_TIME_Relative timeout;
+
+ if (handle->current != NULL)
+ return; /* action already pending */
+ if (GNUNET_YES != try_connect (handle))
+ {
+ finish (handle, GNUNET_SYSERR);
+ return;
+ }
+
+ /* schedule next action */
+ handle->current = handle->pending_list;
+ if (NULL == handle->current)
+ {
+ if (handle->do_destroy)
+ {
+ handle->do_destroy = GNUNET_NO;
+ //GNUNET_DV_disconnect (handle); /* FIXME: replace with proper disconnect stuffs */
+ }
+ return;
+ }
+ handle->pending_list = handle->pending_list->next;
+ handle->current->next = NULL;
+
+ timeout = GNUNET_TIME_absolute_get_remaining (handle->current->timeout);
+ if (NULL ==
+ (handle->th = GNUNET_CLIENT_notify_transmit_ready (handle->client,
+ ntohs(handle->current->msg->msgbuf_size),
+ timeout,
+ GNUNET_YES,
+ &transmit_pending, handle)))
+ {
+#if DEBUG_STATISTICS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Failed to transmit request to dv service.\n");
+#endif
+ finish (handle, GNUNET_SYSERR);
+ }
+}
+
+/**
+ * Add a pending message to the linked list
+ *
+ * @param handle handle to the specified DV api
+ * @param msg the message to add to the list
+ */
+static void add_pending(struct GNUNET_DV_Handle *handle, struct GNUNET_DV_SendMessage *msg)
+{
+ struct PendingMessages *new_message;
+ struct PendingMessages *pos;
+ struct PendingMessages *last;
+
+ new_message = GNUNET_malloc(sizeof(struct PendingMessages));
+ new_message->msg = msg;
+
+ if (handle->pending_list != NULL)
+ {
+ pos = handle->pending_list;
+ while(pos != NULL)
+ {
+ last = pos;
+ pos = pos->next;
+ }
+ new_message->next = last->next; /* Should always be null */
+ last->next = new_message;
+ }
+ else
+ {
+ new_message->next = handle->pending_list; /* Will always be null */
+ handle->pending_list = new_message;
+ }
+
+ process_pending_message(handle);
+}
+
+
+
+
+void handle_message_receipt (void *cls,
+ const struct GNUNET_MessageHeader * msg)
+{
+ struct GNUNET_DV_Handle *handle = cls;
+ struct GNUNET_DV_MessageReceived *received_msg;
+ char *sender_address;
+
+ GNUNET_assert(ntohs(msg->type) == GNUNET_MESSAGE_TYPE_TRANSPORT_DV_RECEIVE);
+
+ if (ntohs(msg->size) < sizeof(struct GNUNET_DV_MessageReceived))
+ return;
+
+ received_msg = (struct GNUNET_DV_MessageReceived *)msg;
+ GNUNET_assert(ntohs(msg->size) == (sizeof(struct GNUNET_DV_MessageReceived) + ntohs(received_msg->msg->size) + ntohs(received_msg->sender_address_len)));
+
+ sender_address = GNUNET_malloc(ntohs(received_msg->sender_address_len));
+ sender_address = memcpy(sender_address, &received_msg[1], ntohs(received_msg->sender_address_len));
+
+ handle->receive_handler(handle->receive_cls,
+ received_msg->sender,
+ received_msg->msg,
+ ntohl(received_msg->distance),
+ sender_address,
+ ntohs(received_msg->sender_address_len));
+
+ GNUNET_free(sender_address);
+
+ GNUNET_CLIENT_receive (handle->client,
+ &handle_message_receipt,
+ handle, GNUNET_TIME_UNIT_FOREVER_REL);
+}
+
+/**
+ * Send a message from the plugin to the DV service indicating that
+ * a message should be sent via DV to some peer.
+ *
+ * @target the final target of the message
+ * @msgbuf the msg(s) to send
+ * @msgbuf_size the size of msgbuf
+ * @priority priority to pass on to core when sending the message
+ * @timeout how long can this message be delayed (pass through to core)
+ * @addr the address of this peer (internally known to DV)
+ * @addrlen the length of the peer address
+ *
+ */
+int GNUNET_DV_send (struct GNUNET_DV_Handle *dv_handle,
+ const struct GNUNET_PeerIdentity *target,
+ const char *msgbuf,
+ size_t msgbuf_size,
+ unsigned int priority,
+ struct GNUNET_TIME_Relative timeout,
+ const void *addr,
+ size_t addrlen)
+{
+ struct GNUNET_DV_SendMessage *msg;
+
+ msg = GNUNET_malloc(sizeof(struct GNUNET_DV_SendMessage) + msgbuf_size + addrlen);
+ msg->header.size = htons(sizeof(struct GNUNET_DV_SendMessage) + msgbuf_size + addrlen);
+ msg->header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND);
+ memcpy(&msg->target, target, sizeof(struct GNUNET_PeerIdentity));
+ msg->msgbuf = GNUNET_malloc(msgbuf_size);
+ memcpy(msg->msgbuf, msgbuf, msgbuf_size);
+ msg->msgbuf_size = htons(msgbuf_size);
+ msg->priority = htonl(priority);
+ msg->timeout = timeout;
+ msg->addrlen = htons(addrlen);
+ memcpy(&msg[1], addr, addrlen);
+
+ add_pending(dv_handle, msg);
+ process_pending_message(dv_handle);
+
+ return GNUNET_OK;
+}
+
+/**
+ * Connect to the DV service
+ *
+ * @param sched the scheduler to use
+ * @param cfg the configuration to use
+ *
+ * @return handle to the DV service
+ */
+struct GNUNET_DV_Handle *
+GNUNET_DV_connect (struct GNUNET_SCHEDULER_Handle *sched,
+ const struct GNUNET_CONFIGURATION_Handle *cfg,
+ GNUNET_DV_MessageReceivedHandler receive_handler,
+ void *receive_handler_cls)
+{
+ struct GNUNET_DV_Handle *handle;
+
+ handle = GNUNET_malloc(sizeof(struct GNUNET_DV_Handle));
+
+ handle->cfg = cfg;
+ handle->sched = sched;
+ handle->pending_list = NULL;
+ handle->current = NULL;
+ handle->do_destroy = GNUNET_NO;
+ handle->th = NULL;
+ handle->client = GNUNET_CLIENT_connect(sched, "dv", cfg);
+ handle->receive_handler = receive_handler;
+ handle->receive_cls = receive_handler_cls;
+
+ if (handle->client == NULL)
+ return NULL;
+
+ GNUNET_CLIENT_receive (handle->client,
+ &handle_message_receipt,
+ handle, GNUNET_TIME_UNIT_FOREVER_REL);
+
+ return handle;
+}
+
+/**
+ * Disconnect from the DV service
+ *
+ * @param handle the current handle to the service to disconnect
+ */
+void GNUNET_DV_disconnect(struct GNUNET_DV_Handle *handle)
+{
+ struct PendingMessages *pos;
+
+ GNUNET_assert(handle != NULL);
+
+ if (handle->th != NULL) /* We have a live transmit request in the Aether */
+ {
+ GNUNET_CLIENT_notify_transmit_ready_cancel (handle->th);
+ handle->th = NULL;
+ }
+ if (handle->current != NULL) /* We are trying to send something now, clean it up */
+ GNUNET_free(handle->current);
+ while (NULL != (pos = handle->pending_list)) /* Remove all pending sends from the list */
+ {
+ handle->pending_list = pos->next;
+ GNUNET_free(pos);
+ }
+ if (handle->client != NULL) /* Finally, disconnect from the service */
+ {
+ GNUNET_CLIENT_disconnect (handle->client);
+ handle->client = NULL;
+ }
+
+ GNUNET_free (handle);
+}
+
+/* end of dv_api.c */
--- /dev/null
+/*
+ This file is part of GNUnet.
+ (C) 2009 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
+ by the Free Software Foundation; either version 2, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file dv/gnunet-service-dv.c
+ * @brief the distance vector service, primarily handles gossip of nearby
+ * peers and sending/receiving DV messages from core and decapsulating
+ * them
+ *
+ * @author Christian Grothoff
+ * @author Nathan Evans
+ *
+ */
+#include "platform.h"
+#include "gnunet_client_lib.h"
+#include "gnunet_getopt_lib.h"
+#include "gnunet_os_lib.h"
+#include "gnunet_protocols.h"
+#include "gnunet_service_lib.h"
+#include "gnunet_core_service.h"
+#include "gnunet_signal_lib.h"
+#include "dv.h"
+
+/**
+ * DV Service Context stuff goes here...
+ */
+static struct GNUNET_CORE_Handle *coreAPI;
+
+static struct GNUNET_PeerIdentity *my_identity;
+
+const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+struct GNUNET_SCHEDULER_Handle *sched;
+
+GNUNET_SCHEDULER_TaskIdentifier cleanup_task;
+
+/**
+ * Core handler for dv data messages. Whatever this message
+ * contains all we really have to do is rip it out of its
+ * DV layering and give it to our pal the DV plugin to report
+ * in with.
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param message the actual message
+ */
+void handle_dv_data_message (void *cls,
+ struct GNUNET_SERVER_Client *
+ client,
+ const struct
+ GNUNET_MessageHeader *
+ message)
+{
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Receives %s message!\n", "dv", "DV DATA");
+#endif
+}
+
+/**
+ * Core handler for dv gossip messages. These will be used
+ * by us to create a HELLO message for the newly peer containing
+ * which direct peer we can connect through, and what the cost
+ * is. This HELLO will then be scheduled for validation by the
+ * transport service so that it can be used by all others.
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param message the actual message
+ */
+void handle_dv_gossip_message (void *cls,
+ struct GNUNET_SERVER_Client *
+ client,
+ const struct GNUNET_MessageHeader *
+ message)
+{
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Receives %s message!\n", "dv", "DV GOSSIP");
+#endif
+}
+
+
+/**
+ * Service server's handler for message send requests (which come
+ * bubbling up to us through the DV plugin).
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param message the actual message
+ */
+void send_dv_message (void *cls,
+ struct GNUNET_SERVER_Client * client,
+ const struct GNUNET_MessageHeader * message)
+{
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Receives %s message!\n", "dv", "SEND");
+#endif
+}
+
+/**
+ * List of handlers for the messages understood by this
+ * service.
+ *
+ * Hmm... will we need to register some handlers with core and
+ * some handlers with our server here? Because core should be
+ * getting the incoming DV messages (from whichever lower level
+ * transport) and then our server should be getting messages
+ * from the dv_plugin, right?
+ */
+static struct GNUNET_SERVER_MessageHandler core_handlers[] = {
+ {&handle_dv_data_message, NULL, GNUNET_MESSAGE_TYPE_DV_DATA, 0},
+ {&handle_dv_gossip_message, NULL, GNUNET_MESSAGE_TYPE_DV_GOSSIP, 0},
+ {NULL, NULL, 0, 0}
+};
+
+static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
+ {&send_dv_message, NULL, GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND, 0},
+ {NULL, NULL, 0, 0}
+};
+
+
+/**
+ * Task run during shutdown.
+ *
+ * @param cls unused
+ * @param tc unused
+ */
+static void
+shutdown_task (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+
+ GNUNET_CORE_disconnect (coreAPI);
+}
+
+/**
+ * To be called on core init/fail.
+ */
+void core_init (void *cls,
+ struct GNUNET_CORE_Handle * server,
+ const struct GNUNET_PeerIdentity *my_identity,
+ const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded * publicKey)
+{
+
+ if (server == NULL)
+ {
+ GNUNET_SCHEDULER_cancel(sched, cleanup_task);
+ GNUNET_SCHEDULER_add_now(sched, &shutdown_task, NULL);
+ }
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Core initialized, I am peer: %s\n", "dv", GNUNET_i2s(my_identity));
+#endif
+ coreAPI = server;
+}
+
+/**
+ * Method called whenever a given peer either connects.
+ *
+ * @param cls closure
+ * @param peer peer identity this notification is about
+ * @param latency reported latency of the connection with 'other'
+ * @param distance reported distance (DV) to 'other'
+ */
+void handle_core_connect (void *cls,
+ const struct GNUNET_PeerIdentity * peer,
+ struct GNUNET_TIME_Relative latency,
+ uint32_t distance)
+{
+
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Receives core connect message!\n", "dv");
+#endif
+}
+
+/**
+ * Method called whenever a given peer either connects.
+ *
+ * @param cls closure
+ * @param peer peer identity this notification is about
+ * @param latency reported latency of the connection with 'other'
+ * @param distance reported distance (DV) to 'other'
+ */
+void handle_core_disconnect (void *cls,
+ const struct GNUNET_PeerIdentity * peer,
+ struct GNUNET_TIME_Relative latency,
+ uint32_t distance)
+{
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Receives core disconnect message!\n", "dv");
+#endif
+}
+
+
+/**
+ * Process dv requests.
+ *
+ * @param cls closure
+ * @param sched scheduler to use
+ * @param server the initialized server
+ * @param c configuration to use
+ */
+static void
+run (void *cls,
+ struct GNUNET_SCHEDULER_Handle *scheduler,
+ struct GNUNET_SERVER_Handle *server,
+ const struct GNUNET_CONFIGURATION_Handle *c)
+{
+ struct GNUNET_TIME_Relative timeout;
+ sched = scheduler;
+ cfg = c;
+ GNUNET_SERVER_add_handlers (server, plugin_handlers);
+ coreAPI =
+ GNUNET_CORE_connect (sched,
+ cfg,
+ timeout,
+ NULL, /* FIXME: anything we want to pass around? */
+ &core_init,
+ NULL, /* Don't care about pre-connects */
+ &handle_core_connect,
+ &handle_core_disconnect,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ core_handlers);
+
+ if (coreAPI == NULL)
+ return;
+ /* load (server); Huh? */
+
+ /* Scheduled the task to clean up when shutdown is called */
+
+ cleanup_task = GNUNET_SCHEDULER_add_delayed (sched,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &shutdown_task,
+ NULL);
+}
+
+
+/**
+ * The main function for the dv service.
+ *
+ * @param argc number of arguments from the command line
+ * @param argv command line arguments
+ * @return 0 ok, 1 on error
+ */
+int
+main (int argc, char *const *argv)
+{
+ return (GNUNET_OK ==
+ GNUNET_SERVICE_run (argc,
+ argv,
+ "dv",
+ GNUNET_SERVICE_OPTION_NONE,
+ &run, NULL)) ? 0 : 1;
+}
--- /dev/null
+/*
+ This file is part of GNUnet
+ (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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
+ by the Free Software Foundation; either version 2, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file transport/plugin_transport_dv.c
+ * @brief DV transport service, takes incoming DV requests and deals with
+ * the DV service
+ * @author Christian Grothoff
+ */
+
+/**
+ * TODO:
+ *
+ * As a start, the dv plugin needs to listen for information from the dv
+ * service. The plugin (?) will be notified by core (?) when a tcp/udp/whatever
+ * message comes in that should be for dv. The plugin will then hand off the message
+ * to the dv service which will decrypt/validate the message (?) and then send the
+ * result back to us (the transport) which will then send the message to the transport
+ * service (yikes).
+ *
+ * Or, core will notify the dv service directly which will validate,
+ * etc. and then just send a message to us.
+ *
+ * For starters, this plugin needs to have a client which will listen for messages from
+ * the dv service that need to be sent up to the gnunet-transport-service.
+ *
+ * Messages sent from the dv transport get passed to the dv service which deals
+ * with the actual sending (how much state does this transport need? should it know
+ * which peers it is currently connected to and their distances, or just assume that
+ * anything should be passed along to the dv service?).
+ */
+#include "platform.h"
+#include "gnunet_protocols.h"
+#include "gnunet_connection_lib.h"
+#include "gnunet_server_lib.h"
+#include "gnunet_service_lib.h"
+#include "gnunet_statistics_service.h"
+#include "gnunet_dv_service.h"
+#include "gnunet_transport_service.h"
+#include "../transport/plugin_transport.h"
+#include "dv.h"
+
+#define DEBUG_TEMPLATE GNUNET_NO
+
+/**
+ * Encapsulation of all of the state of the plugin.
+ */
+struct Plugin;
+
+
+/**
+ * Session handle for connections.
+ */
+struct Session
+{
+
+ /**
+ * Stored in a linked list.
+ */
+ struct Session *next;
+
+ /**
+ * Pointer to the global plugin struct.
+ */
+ struct Plugin *plugin;
+
+ /**
+ * The client (used to identify this connection)
+ */
+ /* void *client; */
+
+ /**
+ * Continuation function to call once the transmission buffer
+ * has again space available. NULL if there is no
+ * continuation to call.
+ */
+ GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
+
+ /**
+ * Closure for transmit_cont.
+ */
+ void *transmit_cont_cls;
+
+ /**
+ * To whom are we talking to (set to our identity
+ * if we are still waiting for the welcome message)
+ */
+ struct GNUNET_PeerIdentity sender;
+
+ /**
+ * At what time did we reset last_received last?
+ */
+ struct GNUNET_TIME_Absolute last_quota_update;
+
+ /**
+ * How many bytes have we received since the "last_quota_update"
+ * timestamp?
+ */
+ uint64_t last_received;
+
+ /**
+ * Number of bytes per ms that this peer is allowed
+ * to send to us.
+ */
+ uint32_t quota;
+
+};
+
+/**
+ * Encapsulation of all of the state of the plugin.
+ */
+struct Plugin
+{
+ /**
+ * Our environment.
+ */
+ struct GNUNET_TRANSPORT_PluginEnvironment *env;
+
+ /**
+ * List of open sessions.
+ */
+ struct Session *sessions;
+
+ /**
+ * Handle for the statistics service.
+ */
+ struct GNUNET_STATISTICS_Handle *statistics;
+
+ /**
+ * Our server.
+ */
+ struct GNUNET_SERVER_Handle *server;
+
+ /*
+ * Handle to the running service.
+ */
+ struct GNUNET_SERVICE_Context *service;
+
+ /**
+ * Copy of the handler array where the closures are
+ * set to this struct's instance.
+ */
+ struct GNUNET_SERVER_MessageHandler *handlers;
+
+ /**
+ * Handle to the DV service
+ */
+ struct GNUNET_DV_Handle *dv_handle;
+
+};
+
+
+void handle_dv_message_received (void *cls,
+ struct GNUNET_PeerIdentity *sender,
+ struct GNUNET_MessageHeader *msg,
+ unsigned int distance,
+ char *sender_address,
+ size_t sender_address_len)
+{
+ struct Plugin *plugin = cls;
+
+ plugin->env->receive(plugin,
+ sender,
+ msg,
+ distance,
+ sender_address,
+ sender_address_len);
+
+}
+
+
+/* Question: how does the transport service learn of a newly connected (gossipped about)
+ * DV peer? Should the plugin (here) create a HELLO for that peer and send it along,
+ * or should the DV service create a HELLO and send it to us via the other part?
+ */
+
+/**
+ * Function that can be used by the transport service to transmit
+ * a message using the plugin.
+ *
+ * @param cls closure
+ * @param target who should receive this message
+ * @param priority how important is the message
+ * @param msgbuf the message to transmit
+ * @param msgbuf_size number of bytes in 'msgbuf'
+ * @param timeout when should we time out
+ * @param addr the address to use (can be NULL if the plugin
+ * is "on its own" (i.e. re-use existing TCP connection))
+ * @param addrlen length of the address in bytes
+ * @param force_address GNUNET_YES if the plugin MUST use the given address,
+ * otherwise the plugin may use other addresses or
+ * existing connections (if available)
+ * @param cont continuation to call once the message has
+ * been transmitted (or if the transport is ready
+ * for the next transmission call; or if the
+ * peer disconnected...)
+ * @param cont_cls closure for cont
+ * @return number of bytes used (on the physical network, with overheads);
+ * -1 on hard errors (i.e. address invalid); 0 is a legal value
+ * and does NOT mean that the message was not transmitted (DV)
+ */
+static ssize_t
+dv_plugin_send (void *cls,
+ const struct GNUNET_PeerIdentity *target,
+ const char *msgbuf,
+ size_t msgbuf_size,
+ unsigned int priority,
+ struct GNUNET_TIME_Relative timeout,
+ const void *addr,
+ size_t addrlen,
+ int force_address,
+ GNUNET_TRANSPORT_TransmitContinuation
+ cont, void *cont_cls)
+{
+ int ret = 0;
+ struct Plugin *plugin = cls;
+
+ /* FIXME: do we want the dv plugin to remember sent messages to call continuation once message actually goes out?
+ * Or do we just call the continuation once we've notified the plugin?
+ */
+ ret = GNUNET_DV_send(plugin->dv_handle,
+ target,
+ msgbuf,
+ msgbuf_size,
+ priority,
+ timeout,
+ addr,
+ addrlen);
+ /*, cont, cont_cls);*/
+
+ if (ret == 0)
+ cont(cls, target, GNUNET_OK);
+ else
+ cont(cls, target, GNUNET_SYSERR);
+
+ return ret;
+}
+
+
+
+/**
+ * Function that can be used to force the plugin to disconnect
+ * from the given peer and cancel all previous transmissions
+ * (and their continuations).
+ *
+ * @param cls closure
+ * @param target peer from which to disconnect
+ */
+static void
+dv_plugin_disconnect (void *cls,
+ const struct GNUNET_PeerIdentity *target)
+{
+ // struct Plugin *plugin = cls;
+ // FIXME
+}
+
+
+/**
+ * Convert the transports address to a nice, human-readable
+ * format.
+ *
+ * @param cls closure
+ * @param type name of the transport that generated the address
+ * @param addr one of the addresses of the host, NULL for the last address
+ * the specific address format depends on the transport
+ * @param addrlen length of the address
+ * @param numeric should (IP) addresses be displayed in numeric form?
+ * @param timeout after how long should we give up?
+ * @param asc function to call on each string
+ * @param asc_cls closure for asc
+ */
+static void
+dv_plugin_address_pretty_printer (void *cls,
+ const char *type,
+ const void *addr,
+ size_t addrlen,
+ int numeric,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_TRANSPORT_AddressStringCallback
+ asc, void *asc_cls)
+{
+ asc (asc_cls, NULL);
+}
+
+
+
+/**
+ * Another peer has suggested an address for this
+ * peer and transport plugin. Check that this could be a valid
+ * address. If so, consider adding it to the list
+ * of addresses.
+ *
+ * @param cls closure
+ * @param addr pointer to the address
+ * @param addrlen length of addr
+ * @return GNUNET_OK if this is a plausible address for this peer
+ * and transport
+ *
+ * FIXME: does this mean anything for the DV plugin?
+ */
+static int
+dv_plugin_address_suggested (void *cls,
+ void *addr, size_t addrlen)
+{
+ /* struct Plugin *plugin = cls; */
+
+ /* check if the address is plausible; if so,
+ add it to our list! */
+ return GNUNET_OK;
+}
+
+
+/**
+ * Entry point for the plugin.
+ */
+void *
+gnunet_plugin_transport_dv_init (void *cls)
+{
+ struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
+ struct GNUNET_TRANSPORT_PluginFunctions *api;
+ struct Plugin *plugin;
+ unsigned long long port;
+ struct GNUNET_SERVICE_Context *service;
+
+ service = GNUNET_SERVICE_start ("transport-dv", env->sched, env->cfg);
+ if (service == NULL)
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
+ "dv",
+ _
+ ("Failed to start service for `%s' transport plugin.\n"),
+ "dv");
+ return NULL;
+ }
+
+ if ((GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (env->cfg,
+ "transport-dv",
+ "PORT",
+ &port)))
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
+ "dv",
+ _
+ ("Require valid port number for service `%s' in configuration!\n"),
+ "transport-dv");
+ GNUNET_SERVICE_stop (service);
+ return NULL;
+ }
+
+ plugin = GNUNET_malloc (sizeof (struct Plugin));
+ plugin->env = env;
+ plugin->statistics = NULL;
+ plugin->service = service;
+ plugin->server = GNUNET_SERVICE_get_server (service);
+
+ plugin->dv_handle = GNUNET_DV_connect(env->sched, env->cfg, &handle_dv_message_received, plugin);
+
+ api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
+ api->cls = plugin;
+ api->send = &dv_plugin_send;
+ api->disconnect = &dv_plugin_disconnect;
+ api->address_pretty_printer = &dv_plugin_address_pretty_printer;
+ api->check_address = &dv_plugin_address_suggested;
+ return api;
+}
+
+
+/**
+ * Exit point from the plugin.
+ */
+void *
+gnunet_plugin_transport_dv_done (void *cls)
+{
+ struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
+ struct Plugin *plugin = api->cls;
+
+ GNUNET_free (plugin);
+ GNUNET_free (api);
+ return NULL;
+}
+
+/* end of plugin_transport_template.c */
projects / oweals / gnunet.git / commitdiff