Boston, MA 02111-1307, USA.
*/
-/**
+/**
* @file multicast/multicast_api.c
* @brief multicast service; establish tunnels to distant peers
* @author Christian Grothoff
* @author Gabor X Toth
*/
#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_signatures.h"
#include "gnunet_multicast_service.h"
+#include "multicast.h"
-/**
- * Opaque handle for a multicast group member.
+#define LOG(kind,...) GNUNET_log_from (kind, "multicast-api",__VA_ARGS__)
+
+
+/**
+ * Started origins.
+ * Group's pub_key_hash -> struct GNUNET_MULTICAST_Origin
*/
-struct GNUNET_MULTICAST_Member
+static struct GNUNET_CONTAINER_MultiHashMap *origins;
+
+/**
+ * Joined members.
+ * group_key_hash -> struct GNUNET_MULTICAST_Member
+ */
+static struct GNUNET_CONTAINER_MultiHashMap *members;
+
+
+/**
+ * Handle for a request to send a message to all multicast group members
+ * (from the origin).
+ */
+struct GNUNET_MULTICAST_OriginMessageHandle
{
+ GNUNET_MULTICAST_OriginTransmitNotify notify;
+ void *notify_cls;
+ struct GNUNET_MULTICAST_Origin *origin;
+
+ uint64_t message_id;
+ uint64_t group_generation;
+ uint64_t fragment_offset;
};
-/**
+struct GNUNET_MULTICAST_Group
+{
+ uint8_t is_origin;
+};
+
+/**
* Handle for the origin of a multicast group.
*/
struct GNUNET_MULTICAST_Origin
{
-};
+ struct GNUNET_MULTICAST_Group grp;
+
+ struct GNUNET_MULTICAST_OriginMessageHandle msg_handle;
+ struct GNUNET_CRYPTO_EddsaPrivateKey priv_key;
+
+ GNUNET_MULTICAST_JoinCallback join_cb;
+ GNUNET_MULTICAST_MembershipTestCallback mem_test_cb;
+ GNUNET_MULTICAST_ReplayFragmentCallback replay_frag_cb;
+ GNUNET_MULTICAST_ReplayMessageCallback replay_msg_cb;
+ GNUNET_MULTICAST_RequestCallback request_cb;
+ GNUNET_MULTICAST_MessageCallback message_cb;
+ void *cls;
+ uint64_t next_fragment_id;
+
+ struct GNUNET_CRYPTO_EddsaPublicKey pub_key;
+ struct GNUNET_HashCode pub_key_hash;
+};
-GNUNET_NETWORK_STRUCT_BEGIN
-/**
- * Header of a request from a member to the origin.
+/**
+ * Handle for a message to be delivered from a member to the origin.
*/
-struct GNUNET_MULTICAST_RequestHeader
+struct GNUNET_MULTICAST_MemberRequestHandle
{
- /**
- * Header for all requests from a member to the origin.
- */
- struct GNUNET_MessageHeader header;
+ GNUNET_MULTICAST_MemberTransmitNotify notify;
+ void *notify_cls;
+ struct GNUNET_MULTICAST_Member *member;
- /**
- * Public key of the sending member.
- */
- struct GNUNET_CRYPTO_EccPublicSignKey member_key;
+ uint64_t request_id;
+ uint64_t fragment_offset;
+};
- /**
- * ECC signature of the request fragment.
- *
- * Signature must match the public key of the multicast group.
- */
- struct GNUNET_CRYPTO_EccSignature signature;
- /**
- * Purpose for the signature and size of the signed data.
- */
- struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
+/**
+ * Handle for a multicast group member.
+ */
+struct GNUNET_MULTICAST_Member
+{
+ struct GNUNET_MULTICAST_Group grp;
+
+ struct GNUNET_MULTICAST_MemberRequestHandle req_handle;
+
+ struct GNUNET_CRYPTO_EddsaPublicKey group_key;
+ struct GNUNET_CRYPTO_EddsaPrivateKey member_key;
+ struct GNUNET_PeerIdentity origin;
+ struct GNUNET_PeerIdentity relays;
+ uint32_t relay_count;
+ struct GNUNET_MessageHeader *join_request;
+ GNUNET_MULTICAST_JoinCallback join_cb;
+ GNUNET_MULTICAST_MembershipTestCallback member_test_cb;
+ GNUNET_MULTICAST_ReplayFragmentCallback replay_frag_cb;
+ GNUNET_MULTICAST_ReplayMessageCallback replay_msg_cb;
+ GNUNET_MULTICAST_MessageCallback message_cb;
+ void *cls;
+
+ uint64_t next_fragment_id;
+ struct GNUNET_HashCode group_key_hash;
+};
- /**
- * Number of the request fragment, monotonically increasing.
- */
- uint64_t fragment_id GNUNET_PACKED;
- /**
- * Byte offset of this @e fragment of the @e request.
- */
- uint64_t fragment_offset GNUNET_PACKED;
+/**
+ * Handle that identifies a join request.
+ *
+ * Used to match calls to #GNUNET_MULTICAST_JoinCallback to the
+ * corresponding calls to #GNUNET_MULTICAST_join_decision().
+ */
+struct GNUNET_MULTICAST_JoinHandle
+{
+};
- /**
- * Number of the request this fragment belongs to.
- *
- * Set in GNUNET_MULTICAST_origin_to_all().
- */
- uint64_t request_id GNUNET_PACKED;
- /**
- * Flags for this request.
- */
- enum GNUNET_MULTICAST_MessageFlags flags GNUNET_PACKED;
+/**
+ * Handle to pass back for the answer of a membership test.
+ */
+struct GNUNET_MULTICAST_MembershipTestHandle
+{
+};
- /* Followed by request body. */
+
+/**
+ * Opaque handle to a replay request from the multicast service.
+ */
+struct GNUNET_MULTICAST_ReplayHandle
+{
};
-/**
- * Header of a join request sent to the origin or another member.
+
+/**
+ * Handle for a replay request.
*/
-struct GNUNET_MULTICAST_JoinRequest
+struct GNUNET_MULTICAST_MemberReplayHandle
{
- /**
- * Header for the join request.
- */
- struct GNUNET_MessageHeader header;
+};
- /**
- * ECC signature of the rest of the fields of the join request.
- *
- * Signature must match the public key of the joining member.
- */
- struct GNUNET_CRYPTO_EccSignature signature;
- /**
- * Purpose for the signature and size of the signed data.
- */
- struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
+/**
+ * Iterator callback for calling message callbacks for all groups.
+ */
+static int
+message_callback (void *cls, const struct GNUNET_HashCode *chan_key_hash,
+ void *group)
+{
+ const struct GNUNET_MessageHeader *msg = cls;
+ struct GNUNET_MULTICAST_Group *grp = group;
+
+ if (GNUNET_YES == grp->is_origin)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Calling origin's message callback "
+ "for a message of type %u and size %u.\n",
+ ntohs (msg->type), ntohs (msg->size));
+ struct GNUNET_MULTICAST_Origin *orig = (struct GNUNET_MULTICAST_Origin *) grp;
+ orig->message_cb (orig->cls, msg);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Calling slave's message callback "
+ "for a message of type %u and size %u.\n",
+ ntohs (msg->type), ntohs (msg->size));
+ struct GNUNET_MULTICAST_Member *mem = (struct GNUNET_MULTICAST_Member *) grp;
+ mem->message_cb (mem->cls, msg);
+ }
+
+ return GNUNET_YES;
+}
- /**
- * Public key of the target group.
- */
- struct GNUNET_CRYPTO_EccPublicSignKey group_key;
- /**
- * Public key of the joining member.
- */
- struct GNUNET_CRYPTO_EccPublicSignKey member_key;
+/**
+ * Handle a multicast message from the service.
+ *
+ * Call message callbacks of all origins and members of the destination group.
+ *
+ * @param grp Destination group of the message.
+ * @param msg The message.
+ */
+static void
+handle_multicast_message (struct GNUNET_MULTICAST_Group *grp,
+ const struct GNUNET_MULTICAST_MessageHeader *msg)
+{
+ struct GNUNET_HashCode *hash;
+
+ if (GNUNET_YES == grp->is_origin)
+ {
+ struct GNUNET_MULTICAST_Origin *orig = (struct GNUNET_MULTICAST_Origin *) grp;
+ hash = &orig->pub_key_hash;
+ }
+ else
+ {
+ struct GNUNET_MULTICAST_Member *mem = (struct GNUNET_MULTICAST_Member *) grp;
+ hash = &mem->group_key_hash;
+ }
+
+ if (origins != NULL)
+ GNUNET_CONTAINER_multihashmap_get_multiple (origins, hash, message_callback,
+ (void *) msg);
+ if (members != NULL)
+ GNUNET_CONTAINER_multihashmap_get_multiple (members, hash, message_callback,
+ (void *) msg);
+}
- /**
- * Peer identity of the joining member.
- */
- struct GNUNET_PeerIdentity member_peer;
- /* Followed by request body. */
-};
+/**
+ * Iterator callback for calling request callbacks of origins.
+ */
+static int
+request_callback (void *cls, const struct GNUNET_HashCode *chan_key_hash,
+ void *origin)
+{
+ const struct GNUNET_MULTICAST_RequestHeader *req = cls;
+ struct GNUNET_MULTICAST_Origin *orig = origin;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Calling request callback for a request of type %u and size %u.\n",
+ ntohs (req->header.type), ntohs (req->header.size));
-GNUNET_NETWORK_STRUCT_END
+ orig->request_cb (orig->cls, &req->member_key,
+ (const struct GNUNET_MessageHeader *) req, 0);
+ return GNUNET_YES;
+}
-/**
- * Handle that identifies a join request.
+/**
+ * Handle a multicast request from the service.
*
- * Used to match calls to #GNUNET_MULTICAST_JoinCallback to the
- * corresponding calls to #GNUNET_MULTICAST_join_decision().
+ * Call request callbacks of all origins of the destination group.
+ *
+ * @param grp Destination group of the message.
+ * @param msg The message.
*/
-struct GNUNET_MULTICAST_JoinHandle
+static void
+handle_multicast_request (const struct GNUNET_HashCode *group_key_hash,
+ const struct GNUNET_MULTICAST_RequestHeader *req)
{
-};
+ if (NULL != origins)
+ GNUNET_CONTAINER_multihashmap_get_multiple (origins, group_key_hash,
+ request_callback, (void *) req);
+}
-/**
+/**
* Function to call with the decision made for a join request.
*
* Must be called once and only once in response to an invocation of the
}
-/**
- * Handle to pass back for the answer of a membership test.
- */
-struct GNUNET_MULTICAST_MembershipTestHandle
-{
-};
-
-
-/**
+/**
* Call informing multicast about the decision taken for a membership test.
*
* @param mth Handle that was given for the query.
}
-/**
- * Opaque handle to a replay request from the multicast service.
- */
-struct GNUNET_MULTICAST_ReplayHandle
-{
-};
-
-
-/**
+/**
* Replay a message fragment for the multicast group.
*
* @param rh Replay handle identifying which replay operation was requested.
}
-/**
+/**
* Indicate the end of the replay session.
*
* Invalidates the replay handle.
}
-/**
+/**
* Replay a message for the multicast group.
*
* @param rh Replay handle identifying which replay operation was requested.
}
-/**
+/**
* Start a multicast group.
*
* Will advertise the origin in the P2P overlay network under the respective
* @param cfg Configuration to use.
* @param priv_key ECC key that will be used to sign messages for this
* multicast session; public key is used to identify the multicast group;
- * @param last_fragment_id Last fragment ID to continue counting fragments from
+ * @param next_fragment_id Next fragment ID to continue counting fragments from
* when restarting the origin. 0 for a new group.
* @param join_cb Function called to approve / disapprove joining of a peer.
- * @param test_cb Function multicast can use to test group membership.
+ * @param mem_test_cb Function multicast can use to test group membership.
* @param replay_frag_cb Function that can be called to replay a message fragment.
* @param replay_msg_cb Function that can be called to replay a message.
* @param request_cb Function called with message fragments from group members.
*/
struct GNUNET_MULTICAST_Origin *
GNUNET_MULTICAST_origin_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
- const struct GNUNET_CRYPTO_EccPrivateKey *priv_key,
- uint64_t last_fragment_id,
+ const struct GNUNET_CRYPTO_EddsaPrivateKey *priv_key,
+ uint64_t next_fragment_id,
GNUNET_MULTICAST_JoinCallback join_cb,
- GNUNET_MULTICAST_MembershipTestCallback test_cb,
+ GNUNET_MULTICAST_MembershipTestCallback mem_test_cb,
GNUNET_MULTICAST_ReplayFragmentCallback replay_frag_cb,
GNUNET_MULTICAST_ReplayMessageCallback replay_msg_cb,
GNUNET_MULTICAST_RequestCallback request_cb,
GNUNET_MULTICAST_MessageCallback message_cb,
void *cls)
{
- return NULL;
+ struct GNUNET_MULTICAST_Origin *orig = GNUNET_malloc (sizeof (*orig));
+ orig->grp.is_origin = GNUNET_YES;
+ orig->priv_key = *priv_key;
+ orig->next_fragment_id = next_fragment_id;
+ orig->join_cb = join_cb;
+ orig->mem_test_cb = mem_test_cb;
+ orig->replay_frag_cb = replay_frag_cb;
+ orig->replay_msg_cb = replay_msg_cb;
+ orig->request_cb = request_cb;
+ orig->message_cb = message_cb;
+ orig->cls = cls;
+
+ GNUNET_CRYPTO_eddsa_key_get_public (&orig->priv_key, &orig->pub_key);
+ GNUNET_CRYPTO_hash (&orig->pub_key, sizeof (orig->pub_key),
+ &orig->pub_key_hash);
+
+ if (NULL == origins)
+ origins = GNUNET_CONTAINER_multihashmap_create (1, GNUNET_YES);
+
+ GNUNET_CONTAINER_multihashmap_put (origins, &orig->pub_key_hash, orig,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+
+ /* FIXME: send ORIGIN_START to service */
+
+ return orig;
}
-/**
- * Handle for a request to send a message to all multicast group members
- * (from the origin).
+/**
+ * Stop a multicast group.
+ *
+ * @param origin Multicast group to stop.
*/
-struct GNUNET_MULTICAST_OriginMessageHandle
+void
+GNUNET_MULTICAST_origin_stop (struct GNUNET_MULTICAST_Origin *orig)
{
-};
+ GNUNET_CONTAINER_multihashmap_remove (origins, &orig->pub_key_hash, orig);
+ GNUNET_free (orig);
+}
+
+
+/* FIXME: for now just call clients' callbacks
+ * without sending anything to multicast. */
+static void
+schedule_origin_to_all (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "schedule_origin_to_all()\n");
+ struct GNUNET_MULTICAST_Origin *orig = cls;
+ struct GNUNET_MULTICAST_OriginMessageHandle *mh = &orig->msg_handle;
+
+ size_t buf_size = GNUNET_MULTICAST_FRAGMENT_MAX_SIZE;
+ char buf[GNUNET_MULTICAST_FRAGMENT_MAX_SIZE] = "";
+ struct GNUNET_MULTICAST_MessageHeader *msg
+ = (struct GNUNET_MULTICAST_MessageHeader *) buf;
+ int ret = mh->notify (mh->notify_cls, &buf_size, &msg[1]);
+
+ if (! (GNUNET_YES == ret || GNUNET_NO == ret)
+ || GNUNET_MULTICAST_FRAGMENT_MAX_PAYLOAD < buf_size)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ "OriginTransmitNotify() returned error or invalid message size.\n");
+ /* FIXME: handle error */
+ return;
+ }
+
+ if (GNUNET_NO == ret && 0 == buf_size)
+ return; /* Transmission paused. */
+
+ msg->header.type = htons (GNUNET_MESSAGE_TYPE_MULTICAST_MESSAGE);
+ msg->header.size = htons (sizeof (*msg) + buf_size);
+ msg->message_id = GNUNET_htonll (mh->message_id);
+ msg->group_generation = mh->group_generation;
+
+ /* FIXME: add fragment ID and signature in the service instead of here */
+ msg->fragment_id = GNUNET_ntohll (orig->next_fragment_id++);
+ msg->fragment_offset = GNUNET_ntohll (mh->fragment_offset);
+ mh->fragment_offset += sizeof (*msg) + buf_size;
+ msg->purpose.size = htonl (sizeof (*msg) + buf_size
+ - sizeof (msg->header)
+ - sizeof (msg->hop_counter)
+ - sizeof (msg->signature));
+ msg->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_MULTICAST_MESSAGE);
+
+ if (GNUNET_OK != GNUNET_CRYPTO_eddsa_sign (&orig->priv_key, &msg->purpose,
+ &msg->signature))
+ {
+ /* FIXME: handle error */
+ return;
+ }
+
+ /* FIXME: send msg to the service and only then call handle_multicast_message
+ * with the returned signed message.
+ */
+ handle_multicast_message (&orig->grp, msg);
+
+ if (GNUNET_NO == ret)
+ GNUNET_SCHEDULER_add_delayed (
+ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1),
+ schedule_origin_to_all, orig);
+}
-/**
+/**
* Send a message to the multicast group.
*
* @param origin Handle to the multicast group.
GNUNET_MULTICAST_OriginTransmitNotify notify,
void *notify_cls)
{
- return NULL;
+ struct GNUNET_MULTICAST_OriginMessageHandle *mh = &origin->msg_handle;
+ mh->origin = origin;
+ mh->message_id = message_id;
+ mh->group_generation = group_generation;
+ mh->notify = notify;
+ mh->notify_cls = notify_cls;
+
+ /* add some delay for testing */
+ GNUNET_SCHEDULER_add_delayed (
+ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1),
+ schedule_origin_to_all, origin);
+ return &origin->msg_handle;
}
-/**
+/**
* Resume message transmission to multicast group.
*
* @param mh Request to cancel.
void
GNUNET_MULTICAST_origin_to_all_resume (struct GNUNET_MULTICAST_OriginMessageHandle *mh)
{
-
+ GNUNET_SCHEDULER_add_now (schedule_origin_to_all, mh->origin);
}
-/**
+/**
* Cancel request for message transmission to multicast group.
*
* @param mh Request to cancel.
}
-/**
- * Stop a multicast group.
- *
- * @param origin Multicast group to stop.
- */
-void
-GNUNET_MULTICAST_origin_stop (struct GNUNET_MULTICAST_Origin *origin)
-{
-}
-
-
-/**
+/**
* Join a multicast group.
*
* The entity joining is always the local peer. Further information about the
* identity/pseudonym to peer identity, application-level message to
* origin, etc.).
* @param join_cb Function called to approve / disapprove joining of a peer.
- * @param test_cb Function multicast can use to test group membership.
+ * @param mem_test_cb Function multicast can use to test group membership.
* @param replay_frag_cb Function that can be called to replay message fragments
* this peer already knows from this group. NULL if this
* client is unable to support replay.
*/
struct GNUNET_MULTICAST_Member *
GNUNET_MULTICAST_member_join (const struct GNUNET_CONFIGURATION_Handle *cfg,
- const struct GNUNET_CRYPTO_EccPublicSignKey *group_key,
- const struct GNUNET_CRYPTO_EccPrivateKey *member_key,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *group_key,
+ const struct GNUNET_CRYPTO_EddsaPrivateKey *member_key,
const struct GNUNET_PeerIdentity *origin,
uint32_t relay_count,
const struct GNUNET_PeerIdentity *relays,
const struct GNUNET_MessageHeader *join_request,
GNUNET_MULTICAST_JoinCallback join_cb,
- GNUNET_MULTICAST_MembershipTestCallback test_cb,
+ GNUNET_MULTICAST_MembershipTestCallback member_test_cb,
GNUNET_MULTICAST_ReplayFragmentCallback replay_frag_cb,
GNUNET_MULTICAST_ReplayMessageCallback replay_msg_cb,
GNUNET_MULTICAST_MessageCallback message_cb,
void *cls)
{
- return NULL;
+ struct GNUNET_MULTICAST_Member *mem = GNUNET_malloc (sizeof (*mem));
+ mem->group_key = *group_key;
+ mem->member_key = *member_key;
+ mem->origin = *origin;
+ mem->relay_count = relay_count;
+ mem->relays = *relays;
+ mem->join_cb = join_cb;
+ mem->member_test_cb = member_test_cb;
+ mem->replay_frag_cb = replay_frag_cb;
+ mem->message_cb = message_cb;
+ mem->cls = cls;
+
+ if (NULL != join_request)
+ {
+ uint16_t size = ntohs (join_request->size);
+ mem->join_request = GNUNET_malloc (size);
+ memcpy (mem->join_request, join_request, size);
+ }
+
+ GNUNET_CRYPTO_hash (&mem->group_key, sizeof (mem->group_key), &mem->group_key_hash);
+
+ if (NULL == members)
+ members = GNUNET_CONTAINER_multihashmap_create (1, GNUNET_YES);
+
+ GNUNET_CONTAINER_multihashmap_put (members, &mem->group_key_hash, mem,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+
+ /* FIXME: send MEMBER_JOIN to service */
+
+ return mem;
}
-/**
- * Handle for a replay request.
+/**
+ * Part a multicast group.
+ *
+ * Disconnects from all group members and invalidates the @a member handle.
+ *
+ * An application-dependent part message can be transmitted beforehand using
+ * #GNUNET_MULTICAST_member_to_origin())
+ *
+ * @param member Membership handle.
*/
-struct GNUNET_MULTICAST_MemberReplayHandle
+void
+GNUNET_MULTICAST_member_part (struct GNUNET_MULTICAST_Member *mem)
{
-};
+ GNUNET_CONTAINER_multihashmap_remove (members, &mem->group_key_hash, mem);
+ GNUNET_free (mem);
+}
-/**
+/**
* Request a fragment to be replayed by fragment ID.
*
* Useful if messages below the @e max_known_fragment_id given when joining are
}
-/**
+/**
* Request a message fragment to be replayed.
*
* Useful if messages below the @e max_known_fragment_id given when joining are
}
-/**
+/**
* Cancel a replay request.
*
* @param rh Request to cancel.
}
-/**
- * Part a multicast group.
- *
- * Disconnects from all group members and invalidates the @a member handle.
- *
- * An application-dependent part message can be transmitted beforehand using
- * #GNUNET_MULTICAST_member_to_origin())
- *
- * @param member Membership handle.
- */
-void
-GNUNET_MULTICAST_member_part (struct GNUNET_MULTICAST_Member *member)
+/* FIXME: for now just send back to the client what it sent. */
+static void
+schedule_member_to_origin (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
-}
-
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "schedule_member_to_origin()\n");
+ struct GNUNET_MULTICAST_Member *mem = cls;
+ struct GNUNET_MULTICAST_MemberRequestHandle *rh = &mem->req_handle;
+
+ size_t buf_size = GNUNET_MULTICAST_FRAGMENT_MAX_PAYLOAD;
+ char buf[GNUNET_MULTICAST_FRAGMENT_MAX_PAYLOAD] = "";
+ struct GNUNET_MULTICAST_RequestHeader *req
+ = (struct GNUNET_MULTICAST_RequestHeader *) buf;
+ int ret = rh->notify (rh->notify_cls, &buf_size, &req[1]);
+
+ if (! (GNUNET_YES == ret || GNUNET_NO == ret)
+ || GNUNET_MULTICAST_FRAGMENT_MAX_PAYLOAD < buf_size)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ "MemberTransmitNotify() returned error or invalid message size.\n");
+ /* FIXME: handle error */
+ return;
+ }
+
+ if (GNUNET_NO == ret && 0 == buf_size)
+ return; /* Transmission paused. */
+
+ req->header.type = htons (GNUNET_MESSAGE_TYPE_MULTICAST_REQUEST);
+ req->header.size = htons (sizeof (*req) + buf_size);
+ req->request_id = GNUNET_htonll (rh->request_id);
+
+ /* FIXME: add fragment ID and signature in the service instead of here */
+ req->fragment_id = GNUNET_ntohll (mem->next_fragment_id++);
+ req->fragment_offset = GNUNET_ntohll (rh->fragment_offset);
+ rh->fragment_offset += sizeof (*req) + buf_size;
+ req->purpose.size = htonl (sizeof (*req) + buf_size
+ - sizeof (req->header)
+ - sizeof (req->member_key)
+ - sizeof (req->signature));
+ req->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_MULTICAST_MESSAGE);
+
+ if (GNUNET_OK != GNUNET_CRYPTO_eddsa_sign (&mem->member_key, &req->purpose,
+ &req->signature))
+ {
+ /* FIXME: handle error */
+ return;
+ }
+
+ /* FIXME: send req to the service and only then call handle_multicast_request
+ * with the returned request.
+ */
+ handle_multicast_request (&mem->group_key_hash, req);
-/**
- * Handle for a message to be delivered from a member to the origin.
- */
-struct GNUNET_MULTICAST_MemberRequestHandle
-{
-};
+ if (GNUNET_NO == ret)
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
+ (GNUNET_TIME_UNIT_SECONDS, 1),
+ schedule_member_to_origin, mem);
+}
-/**
+/**
* Send a message to the origin of the multicast group.
- *
+ *
* @param member Membership handle.
- * @param message_id Application layer ID for the message. Opaque to multicast.
+ * @param request_id Application layer ID for the request. Opaque to multicast.
* @param notify Callback to call to get the message.
* @param notify_cls Closure for @a notify.
* @return Handle to cancel request, NULL on error (i.e. request already pending).
*/
struct GNUNET_MULTICAST_MemberRequestHandle *
GNUNET_MULTICAST_member_to_origin (struct GNUNET_MULTICAST_Member *member,
- uint64_t message_id,
+ uint64_t request_id,
GNUNET_MULTICAST_MemberTransmitNotify notify,
void *notify_cls)
{
- return NULL;
+ struct GNUNET_MULTICAST_MemberRequestHandle *rh = &member->req_handle;
+ rh->member = member;
+ rh->request_id = request_id;
+ rh->notify = notify;
+ rh->notify_cls = notify_cls;
+
+ /* FIXME: remove delay, it's there only for testing */
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
+ (GNUNET_TIME_UNIT_SECONDS, 1),
+ schedule_member_to_origin, member);
+ return &member->req_handle;
}
-/**
+/**
* Resume message transmission to origin.
*
* @param rh Request to cancel.
}
-/**
+/**
* Cancel request for message transmission to origin.
*
* @param rh Request to cancel.
projects / oweals / gnunet.git / blobdiff