/* * bytestream-ibb.c - Source for GabbleBytestreamIBB * Copyright (C) 2007 Collabora Ltd. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "config.h" #include "bytestream-ibb.h" #include #include #include #include #define DEBUG_FLAG GABBLE_DEBUG_BYTESTREAM #include "base64.h" #include "bytestream-factory.h" #include "bytestream-iface.h" #include "connection.h" #include "debug.h" #include "disco.h" #include "namespaces.h" #include "util.h" static void bytestream_iface_init (gpointer g_iface, gpointer iface_data); G_DEFINE_TYPE_WITH_CODE (GabbleBytestreamIBB, gabble_bytestream_ibb, G_TYPE_OBJECT, G_IMPLEMENT_INTERFACE (GABBLE_TYPE_BYTESTREAM_IFACE, bytestream_iface_init)); /* properties */ enum { PROP_CONNECTION = 1, PROP_PEER_HANDLE, PROP_PEER_HANDLE_TYPE, PROP_STREAM_ID, PROP_STREAM_INIT_ID, PROP_PEER_JID, PROP_PEER_RESOURCE, PROP_STATE, PROP_PROTOCOL, PROP_BLOCK_SIZE, LAST_PROPERTY }; #define READ_BUFFER_MAX_SIZE (512 * 1024) /* the number of not acked stanzas allowed. Once this number reached, we stop * sending and wait for acks. */ #define WINDOW_SIZE 10 struct _GabbleBytestreamIBBPrivate { GabbleConnection *conn; TpHandle peer_handle; gchar *stream_id; gchar *stream_init_id; gchar *peer_resource; GabbleBytestreamState state; gchar *peer_jid; guint block_size; guint16 seq; guint16 last_seq_recv; WockyStanza *close_iq_to_ack; /* We can't stop receving IBB data so if user wants to block the bytestream * we buffer them until he unblocks it. */ gboolean read_blocked; GString *read_buffer; /* list of reffed (WockyStanza *) */ GSList *received_stanzas_not_acked; /* (WockyStanza *) -> TRUE * We don't keep a ref on the WockyStanza as we just use this table to track * stanzas waiting for reply. The stanza is never used (and so deferenced). */ GHashTable *sent_stanzas_not_acked; GString *write_buffer; gboolean write_blocked; gboolean dispose_has_run; }; #define GABBLE_BYTESTREAM_IBB_GET_PRIVATE(obj) ((obj)->priv) static void gabble_bytestream_ibb_init (GabbleBytestreamIBB *self) { GabbleBytestreamIBBPrivate *priv = G_TYPE_INSTANCE_GET_PRIVATE (self, GABBLE_TYPE_BYTESTREAM_IBB, GabbleBytestreamIBBPrivate); self->priv = priv; priv->read_buffer = NULL; priv->received_stanzas_not_acked = NULL; priv->sent_stanzas_not_acked = g_hash_table_new (g_direct_hash, g_direct_equal); priv->write_buffer = NULL; priv->write_blocked = FALSE; } static void gabble_bytestream_ibb_dispose (GObject *object) { GabbleBytestreamIBB *self = GABBLE_BYTESTREAM_IBB (object); GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); TpHandleRepoIface *contact_repo = tp_base_connection_get_handles ( (TpBaseConnection *) priv->conn, TP_HANDLE_TYPE_CONTACT); if (priv->dispose_has_run) return; priv->dispose_has_run = TRUE; tp_handle_unref (contact_repo, priv->peer_handle); if (priv->state != GABBLE_BYTESTREAM_STATE_CLOSED) { gabble_bytestream_iface_close (GABBLE_BYTESTREAM_IFACE (self), NULL); } if (priv->close_iq_to_ack != NULL) { _gabble_connection_acknowledge_set_iq (priv->conn, priv->close_iq_to_ack); g_object_unref (priv->close_iq_to_ack); priv->close_iq_to_ack = NULL; } G_OBJECT_CLASS (gabble_bytestream_ibb_parent_class)->dispose (object); } static void gabble_bytestream_ibb_finalize (GObject *object) { GabbleBytestreamIBB *self = GABBLE_BYTESTREAM_IBB (object); GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); g_free (priv->stream_id); g_free (priv->stream_init_id); g_free (priv->peer_resource); g_free (priv->peer_jid); if (priv->read_buffer != NULL) g_string_free (priv->read_buffer, TRUE); if (priv->write_buffer != NULL) g_string_free (priv->write_buffer, TRUE); g_hash_table_unref (priv->sent_stanzas_not_acked); G_OBJECT_CLASS (gabble_bytestream_ibb_parent_class)->finalize (object); } static void gabble_bytestream_ibb_get_property (GObject *object, guint property_id, GValue *value, GParamSpec *pspec) { GabbleBytestreamIBB *self = GABBLE_BYTESTREAM_IBB (object); GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); switch (property_id) { case PROP_CONNECTION: g_value_set_object (value, priv->conn); break; case PROP_PEER_HANDLE: g_value_set_uint (value, priv->peer_handle); break; case PROP_PEER_HANDLE_TYPE: g_value_set_uint (value, TP_HANDLE_TYPE_CONTACT); break; case PROP_STREAM_ID: g_value_set_string (value, priv->stream_id); break; case PROP_STREAM_INIT_ID: g_value_set_string (value, priv->stream_init_id); break; case PROP_PEER_RESOURCE: g_value_set_string (value, priv->peer_resource); break; case PROP_PEER_JID: g_value_set_string (value, priv->peer_jid); break; case PROP_STATE: g_value_set_uint (value, priv->state); break; case PROP_PROTOCOL: g_value_set_string (value, NS_IBB); break; case PROP_BLOCK_SIZE: g_value_set_uint (value, priv->block_size); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } static void gabble_bytestream_ibb_set_property (GObject *object, guint property_id, const GValue *value, GParamSpec *pspec) { GabbleBytestreamIBB *self = GABBLE_BYTESTREAM_IBB (object); GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); switch (property_id) { case PROP_CONNECTION: priv->conn = g_value_get_object (value); break; case PROP_PEER_HANDLE: priv->peer_handle = g_value_get_uint (value); break; case PROP_STREAM_ID: g_free (priv->stream_id); priv->stream_id = g_value_dup_string (value); break; case PROP_STREAM_INIT_ID: g_free (priv->stream_init_id); priv->stream_init_id = g_value_dup_string (value); break; case PROP_PEER_RESOURCE: g_free (priv->peer_resource); priv->peer_resource = g_value_dup_string (value); break; case PROP_STATE: if (priv->state != g_value_get_uint (value)) { priv->state = g_value_get_uint (value); g_signal_emit_by_name (object, "state-changed", priv->state); } break; case PROP_BLOCK_SIZE: priv->block_size = g_value_get_uint (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } static GObject * gabble_bytestream_ibb_constructor (GType type, guint n_props, GObjectConstructParam *props) { GObject *obj; GabbleBytestreamIBBPrivate *priv; TpHandleRepoIface *contact_repo; const gchar *jid; obj = G_OBJECT_CLASS (gabble_bytestream_ibb_parent_class)-> constructor (type, n_props, props); priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (GABBLE_BYTESTREAM_IBB (obj)); g_assert (priv->conn != NULL); g_assert (priv->peer_handle != 0); g_assert (priv->stream_id != NULL); contact_repo = tp_base_connection_get_handles ( (TpBaseConnection *) priv->conn, TP_HANDLE_TYPE_CONTACT); tp_handle_ref (contact_repo, priv->peer_handle); jid = tp_handle_inspect (contact_repo, priv->peer_handle); if (priv->peer_resource != NULL) priv->peer_jid = g_strdup_printf ("%s/%s", jid, priv->peer_resource); else priv->peer_jid = g_strdup (jid); return obj; } static void gabble_bytestream_ibb_class_init ( GabbleBytestreamIBBClass *gabble_bytestream_ibb_class) { GObjectClass *object_class = G_OBJECT_CLASS (gabble_bytestream_ibb_class); GParamSpec *param_spec; g_type_class_add_private (gabble_bytestream_ibb_class, sizeof (GabbleBytestreamIBBPrivate)); object_class->dispose = gabble_bytestream_ibb_dispose; object_class->finalize = gabble_bytestream_ibb_finalize; object_class->get_property = gabble_bytestream_ibb_get_property; object_class->set_property = gabble_bytestream_ibb_set_property; object_class->constructor = gabble_bytestream_ibb_constructor; g_object_class_override_property (object_class, PROP_CONNECTION, "connection"); g_object_class_override_property (object_class, PROP_PEER_HANDLE, "peer-handle"); g_object_class_override_property (object_class, PROP_PEER_HANDLE_TYPE, "peer-handle-type"); g_object_class_override_property (object_class, PROP_STREAM_ID, "stream-id"); g_object_class_override_property (object_class, PROP_PEER_JID, "peer-jid"); g_object_class_override_property (object_class, PROP_STATE, "state"); g_object_class_override_property (object_class, PROP_PROTOCOL, "protocol"); param_spec = g_param_spec_string ( "peer-resource", "Peer resource", "the resource used by the remote peer during the SI, if any", NULL, G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS); g_object_class_install_property (object_class, PROP_PEER_RESOURCE, param_spec); param_spec = g_param_spec_string ( "stream-init-id", "stream init ID", "the iq ID of the SI request, if any", NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS); g_object_class_install_property (object_class, PROP_STREAM_INIT_ID, param_spec); param_spec = g_param_spec_uint ( "block-size", "block size", "Maximum data sent using one stanza as described in XEP-0047", 0, G_MAXUINT32, 4096, G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS); g_object_class_install_property (object_class, PROP_BLOCK_SIZE, param_spec); } static void change_write_blocked_state (GabbleBytestreamIBB *self, gboolean blocked) { GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); if (priv->write_blocked == blocked) return; priv->write_blocked = blocked; g_signal_emit_by_name (self, "write-blocked", blocked); } static void send_close_stanza (GabbleBytestreamIBB *self) { GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); WockyStanza *msg; if (priv->close_iq_to_ack != NULL) { /* We received a close IQ and just need to ACK it */ _gabble_connection_acknowledge_set_iq (priv->conn, priv->close_iq_to_ack); g_object_unref (priv->close_iq_to_ack); priv->close_iq_to_ack = NULL; } DEBUG ("send IBB close stanza"); msg = wocky_stanza_build (WOCKY_STANZA_TYPE_IQ, WOCKY_STANZA_SUB_TYPE_SET, NULL, priv->peer_jid, '(', "close", ':', NS_IBB, '@', "sid", priv->stream_id, ')', NULL); /* We don't really care about the answer as the bytestream * is closed anyway. */ _gabble_connection_send_with_reply (priv->conn, msg, NULL, NULL, NULL, NULL); g_object_unref (msg); } static gboolean send_data (GabbleBytestreamIBB *self, const gchar *str, guint len, gboolean *result); static void iq_acked_cb (GabbleConnection *conn, WockyStanza *sent_msg, WockyStanza *reply_msg, GObject *obj, gpointer user_data) { GabbleBytestreamIBB *self = GABBLE_BYTESTREAM_IBB (obj); GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); g_hash_table_remove (priv->sent_stanzas_not_acked, sent_msg); if (priv->write_buffer != NULL) { guint sent; DEBUG ("A stanza has been acked. Try to flush the buffer"); sent = send_data (self, priv->write_buffer->str, priv->write_buffer->len, NULL); if (sent == priv->write_buffer->len) { DEBUG ("buffer has been flushed; unblock write the bytestream"); g_string_free (priv->write_buffer, TRUE); priv->write_buffer = NULL; change_write_blocked_state (self, FALSE); if (priv->state == GABBLE_BYTESTREAM_STATE_CLOSING) { DEBUG ("Can close the bystream now the buffer is flushed"); send_close_stanza (self); g_object_set (self, "state", GABBLE_BYTESTREAM_STATE_CLOSED, NULL); } } else { g_string_erase (priv->write_buffer, 0, sent); DEBUG ("buffer has not been completely flushed; %" G_GSIZE_FORMAT " bytes left", priv->write_buffer->len); } } } static gboolean send_data (GabbleBytestreamIBB *self, const gchar *str, guint len, gboolean *result) { GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); guint sent, stanza_count; sent = 0; stanza_count = 0; while (sent < len) { WockyStanza *iq; guint send_now, remaining; gchar *seq, *encoded; GError *error = NULL; gboolean ret; guint nb_stanzas_waiting; remaining = (len - sent); nb_stanzas_waiting = g_hash_table_size (priv->sent_stanzas_not_acked); if (nb_stanzas_waiting >= WINDOW_SIZE) { DEBUG ("Window is full (%u). Stop sending stanzas", nb_stanzas_waiting); break; } /* We can send stanzas */ if (remaining > priv->block_size) { /* We can't send all the remaining data in one stanza */ send_now = priv->block_size; } else { /* Send all the remaining data */ send_now = remaining; } encoded = base64_encode (send_now, str + sent, FALSE); seq = g_strdup_printf ("%u", priv->seq++); iq = wocky_stanza_build (WOCKY_STANZA_TYPE_IQ, WOCKY_STANZA_SUB_TYPE_SET, NULL, priv->peer_jid, '(', "data", '$', encoded, ':', NS_IBB, '@', "sid", priv->stream_id, '@', "seq", seq, ')', NULL); ret = _gabble_connection_send_with_reply (priv->conn, iq, iq_acked_cb, G_OBJECT (self), NULL, &error); g_free (encoded); g_free (seq); g_object_unref (iq); if (!ret) { DEBUG ("error sending IBB stanza: %s. Close the bytestream", error->message); g_error_free (error); gabble_bytestream_iface_close (GABBLE_BYTESTREAM_IFACE (self), NULL); if (result != NULL) *result = FALSE; return sent; } g_hash_table_insert (priv->sent_stanzas_not_acked, iq, GUINT_TO_POINTER (TRUE)); DEBUG ("send %d bytes (window size: %u)", send_now, nb_stanzas_waiting + 1); sent += send_now; stanza_count++; } DEBUG ("sent %d bytes (%d stanzas needed)", sent, stanza_count); if (result != NULL) *result = TRUE; return sent; } /* * gabble_bytestream_ibb_send * * Implements gabble_bytestream_iface_send on GabbleBytestreamIface */ static gboolean gabble_bytestream_ibb_send (GabbleBytestreamIface *iface, guint len, const gchar *str) { GabbleBytestreamIBB *self = GABBLE_BYTESTREAM_IBB (iface); GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); gboolean result; guint sent; if (priv->state != GABBLE_BYTESTREAM_STATE_OPEN) { DEBUG ("can't send data through a not open bytestream (state: %d)", priv->state); return FALSE; } if (priv->write_blocked) { DEBUG ("sending data while the bytestream was blocked"); } if (priv->write_buffer != NULL) { DEBUG ("Write buffer is not empty. Buffering data"); g_string_append_len (priv->write_buffer, str, len); return TRUE; } sent = send_data (self, str, len, &result); if (sent < len) { guint remaining; DEBUG ("Some data have not been sent. Buffer them and write " "block the bytestream"); remaining = (len - sent); if (priv->write_buffer == NULL) { priv->write_buffer = g_string_new_len (str + sent, remaining); } else { g_string_append_len (priv->write_buffer, str + sent, remaining); } DEBUG ("write buffer size: %" G_GSIZE_FORMAT, priv->write_buffer->len); change_write_blocked_state (self, TRUE); } return result; } void gabble_bytestream_ibb_receive (GabbleBytestreamIBB *self, WockyStanza *msg, gboolean is_iq) { GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); WockyNode *data; GString *str; TpHandle sender; /* caller must have checked for this in order to know which bytestream to * route this packet to */ data = wocky_node_get_child_ns ( wocky_stanza_get_top_node (msg), "data", NS_IBB); g_assert (data != NULL); if (priv->state != GABBLE_BYTESTREAM_STATE_OPEN) { DEBUG ("can't receive data through a not open bytestream (state: %d)", priv->state); if (is_iq) wocky_porter_send_iq_error ( wocky_session_get_porter (priv->conn->session), msg, WOCKY_XMPP_ERROR_BAD_REQUEST, "IBB bytestream isn't open"); return; } /* Private stream using SI - the bytestream factory has already checked * the sender in order to dispatch to us */ sender = priv->peer_handle; /* FIXME: check sequence number */ str = base64_decode (data->content); if (str == NULL) { DEBUG ("base64 decoding failed"); if (is_iq) wocky_porter_send_iq_error ( wocky_session_get_porter (priv->conn->session), msg, WOCKY_XMPP_ERROR_BAD_REQUEST, "base64 decoding failed"); return; } if (priv->read_blocked) { gsize current_buffer_len = 0; DEBUG ("Bytestream is blocked. Buffering data"); if (priv->read_buffer != NULL) current_buffer_len = priv->read_buffer->len; if (current_buffer_len + str->len > READ_BUFFER_MAX_SIZE) { DEBUG ("Buffer is full. Closing the bytestream"); if (is_iq) wocky_porter_send_iq_error ( wocky_session_get_porter (priv->conn->session), msg, WOCKY_XMPP_ERROR_NOT_ACCEPTABLE, "buffer is full"); gabble_bytestream_iface_close (GABBLE_BYTESTREAM_IFACE (self), NULL); g_string_free (str, TRUE); return; } if (priv->read_buffer == NULL) { priv->read_buffer = str; } else { g_string_append_len (priv->read_buffer, str->str, str->len); g_string_free (str, TRUE); } if (is_iq) { priv->received_stanzas_not_acked = g_slist_prepend ( priv->received_stanzas_not_acked, g_object_ref (msg)); } return; } g_signal_emit_by_name (G_OBJECT (self), "data-received", sender, str); g_string_free (str, TRUE); if (is_iq) _gabble_connection_acknowledge_set_iq (priv->conn, msg); return; } /* * gabble_bytestream_ibb_accept * * Implements gabble_bytestream_iface_accept on GabbleBytestreamIface */ static void gabble_bytestream_ibb_accept (GabbleBytestreamIface *iface, GabbleBytestreamAugmentSiAcceptReply func, gpointer user_data) { GabbleBytestreamIBB *self = GABBLE_BYTESTREAM_IBB (iface); GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); WockyStanza *msg; WockyNode *si; if (priv->state != GABBLE_BYTESTREAM_STATE_LOCAL_PENDING) { /* The stream was previoulsy or automatically accepted */ return; } msg = gabble_bytestream_factory_make_accept_iq (priv->peer_jid, priv->stream_init_id, NS_IBB); si = wocky_node_get_child_ns ( wocky_stanza_get_top_node (msg), "si", NS_SI); g_assert (si != NULL); if (func != NULL) { /* let the caller add his profile specific data */ func (si, user_data); } if (_gabble_connection_send (priv->conn, msg, NULL)) { DEBUG ("stream %s with %s is now accepted", priv->stream_id, priv->peer_jid); g_object_set (self, "state", GABBLE_BYTESTREAM_STATE_ACCEPTED, NULL); } g_object_unref (msg); } static void gabble_bytestream_ibb_decline (GabbleBytestreamIBB *self, GError *error) { GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); WockyStanza *msg; g_return_if_fail (priv->state == GABBLE_BYTESTREAM_STATE_LOCAL_PENDING); msg = wocky_stanza_build (WOCKY_STANZA_TYPE_IQ, WOCKY_STANZA_SUB_TYPE_ERROR, NULL, priv->peer_jid, '@', "id", priv->stream_init_id, NULL); if (error != NULL) { wocky_stanza_error_to_node (error, wocky_stanza_get_top_node (msg)); } else { GError fallback = { WOCKY_XMPP_ERROR, WOCKY_XMPP_ERROR_FORBIDDEN, "Offer Declined" }; wocky_stanza_error_to_node (&fallback, wocky_stanza_get_top_node (msg)); } _gabble_connection_send (priv->conn, msg, NULL); g_object_unref (msg); g_object_set (self, "state", GABBLE_BYTESTREAM_STATE_CLOSED, NULL); } /* * gabble_bytestream_ibb_close * * Implements gabble_bytestream_iface_close on GabbleBytestreamIface */ static void gabble_bytestream_ibb_close (GabbleBytestreamIface *iface, GError *error) { GabbleBytestreamIBB *self = GABBLE_BYTESTREAM_IBB (iface); GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); WockyPorter *porter = wocky_session_get_porter (priv->conn->session); GSList *l; if (priv->state == GABBLE_BYTESTREAM_STATE_CLOSED) /* bytestream already closed, do nothing */ return; /* Send error for pending IQ's */ priv->received_stanzas_not_acked = g_slist_reverse ( priv->received_stanzas_not_acked); for (l = priv->received_stanzas_not_acked; l != NULL; l = g_slist_next (l)) wocky_porter_send_iq_error (porter, l->data, WOCKY_XMPP_ERROR_ITEM_NOT_FOUND, NULL); g_slist_free (priv->received_stanzas_not_acked); priv->received_stanzas_not_acked = NULL; if (priv->state == GABBLE_BYTESTREAM_STATE_LOCAL_PENDING) { /* Stream was created using SI so we decline the request */ gabble_bytestream_ibb_decline (self, error); } else { if (priv->write_buffer != NULL) { DEBUG ("write buffer is not empty. Wait before sending close stanza"); g_object_set (self, "state", GABBLE_BYTESTREAM_STATE_CLOSING, NULL); } else { send_close_stanza (self); g_object_set (self, "state", GABBLE_BYTESTREAM_STATE_CLOSED, NULL); } } } static void ibb_init_reply_cb (GabbleConnection *conn, WockyStanza *sent_msg, WockyStanza *reply_msg, GObject *obj, gpointer user_data) { GabbleBytestreamIBB *self = GABBLE_BYTESTREAM_IBB (obj); GError *error = NULL; if (!wocky_stanza_extract_errors (reply_msg, NULL, &error, NULL, NULL)) { /* yeah, stream initiated */ DEBUG ("IBB stream initiated"); g_object_set (self, "state", GABBLE_BYTESTREAM_STATE_OPEN, NULL); } else { DEBUG ("error during IBB initiation: %s", error->message); g_clear_error (&error); g_object_set (self, "state", GABBLE_BYTESTREAM_STATE_CLOSED, NULL); } } /* * gabble_bytestream_ibb_initiate * * Implements gabble_bytestream_iface_initiate on GabbleBytestreamIface */ static gboolean gabble_bytestream_ibb_initiate (GabbleBytestreamIface *iface) { GabbleBytestreamIBB *self = GABBLE_BYTESTREAM_IBB (iface); GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); WockyStanza *msg; gchar *block_size; if (priv->state != GABBLE_BYTESTREAM_STATE_INITIATING) { DEBUG ("bytestream is not is the initiating state (state %d", priv->state); return FALSE; } block_size = g_strdup_printf ("%u", priv->block_size); msg = wocky_stanza_build (WOCKY_STANZA_TYPE_IQ, WOCKY_STANZA_SUB_TYPE_SET, NULL, priv->peer_jid, '(', "open", ':', NS_IBB, '@', "sid", priv->stream_id, '@', "block-size", block_size, ')', NULL); g_free (block_size); if (!_gabble_connection_send_with_reply (priv->conn, msg, ibb_init_reply_cb, G_OBJECT (self), NULL, NULL)) { DEBUG ("Error when sending IBB init stanza"); g_object_unref (msg); return FALSE; } g_object_unref (msg); return TRUE; } static void gabble_bytestream_ibb_block_reading (GabbleBytestreamIface *iface, gboolean block) { GabbleBytestreamIBB *self = GABBLE_BYTESTREAM_IBB (iface); GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); if (priv->read_blocked == block) return; priv->read_blocked = block; DEBUG ("%s the transport bytestream", block ? "block": "unblock"); if (priv->read_buffer != NULL && !block) { GSList *l; DEBUG ("Bytestream unblocked, flushing the buffer"); g_signal_emit_by_name (G_OBJECT (self), "data-received", priv->peer_handle, priv->read_buffer); g_string_free (priv->read_buffer, TRUE); priv->read_buffer = NULL; /* ack pending stanzas */ priv->received_stanzas_not_acked = g_slist_reverse ( priv->received_stanzas_not_acked); for (l = priv->received_stanzas_not_acked; l != NULL; l = g_slist_next (l)) { WockyStanza *iq = (WockyStanza *) l->data; _gabble_connection_acknowledge_set_iq (priv->conn, iq); g_object_unref (iq); } g_slist_free (priv->received_stanzas_not_acked); priv->received_stanzas_not_acked = NULL; } } void gabble_bytestream_ibb_close_received (GabbleBytestreamIBB *self, WockyStanza *iq) { GabbleBytestreamIBBPrivate *priv = GABBLE_BYTESTREAM_IBB_GET_PRIVATE (self); DEBUG ("received IBB close stanza. Closing bytestream"); priv->close_iq_to_ack = g_object_ref (iq); gabble_bytestream_ibb_close (GABBLE_BYTESTREAM_IFACE (self), NULL); } static void bytestream_iface_init (gpointer g_iface, gpointer iface_data) { GabbleBytestreamIfaceClass *klass = (GabbleBytestreamIfaceClass *) g_iface; klass->initiate = gabble_bytestream_ibb_initiate; klass->send = gabble_bytestream_ibb_send; klass->close = gabble_bytestream_ibb_close; klass->accept = gabble_bytestream_ibb_accept; klass->block_reading = gabble_bytestream_ibb_block_reading; }