si.c

Linux下的多协议即时通讯程序源代码

static void
jabber_si_xfer_bytestreams_send_connected_cb(gpointer data, gint source,
		PurpleInputCondition cond)
{
	PurpleXfer *xfer = data;
	int acceptfd;

	purple_debug_info("jabber", "in jabber_si_xfer_bytestreams_send_connected_cb\n");

	acceptfd = accept(source, NULL, 0);
	if(acceptfd == -1 && (errno == EAGAIN || errno == EWOULDBLOCK))
		return;
	else if(acceptfd == -1) {
		purple_debug_warning("jabber", "accept: %s\n", strerror(errno));
		return;
	}

	purple_input_remove(xfer->watcher);
	close(source);

	xfer->watcher = purple_input_add(acceptfd, PURPLE_INPUT_READ,
			jabber_si_xfer_bytestreams_send_read_cb, xfer);
}

static void
jabber_si_xfer_bytestreams_listen_cb(int sock, gpointer data)
{
	PurpleXfer *xfer = data;
	JabberSIXfer *jsx;
	JabberIq *iq;
	xmlnode *query, *streamhost;
	char *jid, *port;

	jsx = xfer->data;
	jsx->listen_data = NULL;

	if (purple_xfer_get_status(xfer) == PURPLE_XFER_STATUS_CANCEL_LOCAL) {
		purple_xfer_unref(xfer);
		return;
	}

	purple_xfer_unref(xfer);

	if (sock < 0) {
		purple_xfer_cancel_local(xfer);
		return;
	}

	iq = jabber_iq_new_query(jsx->js, JABBER_IQ_SET,
			"http://jabber.org/protocol/bytestreams");
	xmlnode_set_attrib(iq->node, "to", xfer->who);
	query = xmlnode_get_child(iq->node, "query");

	xmlnode_set_attrib(query, "sid", jsx->stream_id);

	streamhost = xmlnode_new_child(query, "streamhost");
	jid = g_strdup_printf("%s@%s/%s", jsx->js->user->node,
			jsx->js->user->domain, jsx->js->user->resource);
	xmlnode_set_attrib(streamhost, "jid", jid);
	g_free(jid);

	/* XXX: shouldn't we use the public IP or something? here */
	xmlnode_set_attrib(streamhost, "host",
			purple_network_get_my_ip(jsx->js->fd));
	xfer->local_port = purple_network_get_port_from_fd(sock);
	port = g_strdup_printf("%hu", xfer->local_port);
	xmlnode_set_attrib(streamhost, "port", port);
	g_free(port);

	xfer->watcher = purple_input_add(sock, PURPLE_INPUT_READ,
			jabber_si_xfer_bytestreams_send_connected_cb, xfer);

	/* XXX: insert proxies here */

	/* XXX: callback to find out which streamhost they used, or see if they
	 * screwed it up */
	jabber_iq_send(iq);

}

static void
jabber_si_xfer_bytestreams_send_init(PurpleXfer *xfer)
{
	JabberSIXfer *jsx;

	purple_xfer_ref(xfer);

	jsx = xfer->data;
	jsx->listen_data = purple_network_listen_range(0, 0, SOCK_STREAM,
				jabber_si_xfer_bytestreams_listen_cb, xfer);
	if (jsx->listen_data == NULL) {
		purple_xfer_unref(xfer);
		/* XXX: couldn't open a port, we're fscked */
		purple_xfer_cancel_local(xfer);
		return;
	}

}

static void jabber_si_xfer_send_method_cb(JabberStream *js, xmlnode *packet,
		gpointer data)
{
	PurpleXfer *xfer = data;
	xmlnode *si, *feature, *x, *field, *value;

	if(!(si = xmlnode_get_child_with_namespace(packet, "si", "http://jabber.org/protocol/si"))) {
		purple_xfer_cancel_remote(xfer);
		return;
	}

	if(!(feature = xmlnode_get_child_with_namespace(si, "feature", "http://jabber.org/protocol/feature-neg"))) {
		purple_xfer_cancel_remote(xfer);
		return;
	}

	if(!(x = xmlnode_get_child_with_namespace(feature, "x", "jabber:x:data"))) {
		purple_xfer_cancel_remote(xfer);
		return;
	}

	for(field = xmlnode_get_child(x, "field"); field; field = xmlnode_get_next_twin(field)) {
		const char *var = xmlnode_get_attrib(field, "var");

		if(var && !strcmp(var, "stream-method")) {
			if((value = xmlnode_get_child(field, "value"))) {
				char *val = xmlnode_get_data(value);
				if(val && !strcmp(val, "http://jabber.org/protocol/bytestreams")) {
					jabber_si_xfer_bytestreams_send_init(xfer);
					g_free(val);
					return;
				}
				g_free(val);
			}
		}
	}
	purple_xfer_cancel_remote(xfer);
}

static void jabber_si_xfer_send_request(PurpleXfer *xfer)
{
	JabberSIXfer *jsx = xfer->data;
	JabberIq *iq;
	xmlnode *si, *file, *feature, *x, *field, *option, *value;
	char buf[32];

	xfer->filename = g_path_get_basename(xfer->local_filename);

	iq = jabber_iq_new(jsx->js, JABBER_IQ_SET);
	xmlnode_set_attrib(iq->node, "to", xfer->who);
	si = xmlnode_new_child(iq->node, "si");
	xmlnode_set_namespace(si, "http://jabber.org/protocol/si");
	jsx->stream_id = jabber_get_next_id(jsx->js);
	xmlnode_set_attrib(si, "id", jsx->stream_id);
	xmlnode_set_attrib(si, "profile",
			"http://jabber.org/protocol/si/profile/file-transfer");

	file = xmlnode_new_child(si, "file");
	xmlnode_set_namespace(file,
			"http://jabber.org/protocol/si/profile/file-transfer");
	xmlnode_set_attrib(file, "name", xfer->filename);
	g_snprintf(buf, sizeof(buf), "%" G_GSIZE_FORMAT, xfer->size);
	xmlnode_set_attrib(file, "size", buf);
	/* maybe later we'll do hash and date attribs */

	feature = xmlnode_new_child(si, "feature");
	xmlnode_set_namespace(feature,
			"http://jabber.org/protocol/feature-neg");
	x = xmlnode_new_child(feature, "x");
	xmlnode_set_namespace(x, "jabber:x:data");
	xmlnode_set_attrib(x, "type", "form");
	field = xmlnode_new_child(x, "field");
	xmlnode_set_attrib(field, "var", "stream-method");
	xmlnode_set_attrib(field, "type", "list-single");
	option = xmlnode_new_child(field, "option");
	value = xmlnode_new_child(option, "value");
	xmlnode_insert_data(value, "http://jabber.org/protocol/bytestreams",
			-1);
	/*
	option = xmlnode_new_child(field, "option");
	value = xmlnode_new_child(option, "value");
	xmlnode_insert_data(value, "http://jabber.org/protocol/ibb", -1);
	*/

	jabber_iq_set_callback(iq, jabber_si_xfer_send_method_cb, xfer);

	jabber_iq_send(iq);
}

static void jabber_si_xfer_free(PurpleXfer *xfer)
{
	JabberSIXfer *jsx = xfer->data;
	JabberStream *js = jsx->js;

	js->file_transfers = g_list_remove(js->file_transfers, xfer);

	if (jsx->connect_data != NULL)
		purple_proxy_connect_cancel(jsx->connect_data);
	if (jsx->listen_data != NULL)
		purple_network_listen_cancel(jsx->listen_data);

	g_free(jsx->stream_id);
	g_free(jsx->iq_id);
	/* XXX: free other stuff */
	g_free(jsx->rxqueue);
	g_free(jsx);
	xfer->data = NULL;
}

static void jabber_si_xfer_cancel_send(PurpleXfer *xfer)
{
	jabber_si_xfer_free(xfer);
	purple_debug(PURPLE_DEBUG_INFO, "jabber", "in jabber_si_xfer_cancel_send\n");
}


static void jabber_si_xfer_request_denied(PurpleXfer *xfer)
{
	jabber_si_xfer_free(xfer);
	purple_debug(PURPLE_DEBUG_INFO, "jabber", "in jabber_si_xfer_request_denied\n");
}


static void jabber_si_xfer_cancel_recv(PurpleXfer *xfer)
{
	jabber_si_xfer_free(xfer);
	purple_debug(PURPLE_DEBUG_INFO, "jabber", "in jabber_si_xfer_cancel_recv\n");
}


static void jabber_si_xfer_end(PurpleXfer *xfer)
{
	jabber_si_xfer_free(xfer);
}


static void jabber_si_xfer_send_disco_cb(JabberStream *js, const char *who,
		JabberCapabilities capabilities, gpointer data)
{
	PurpleXfer *xfer = data;

	if(capabilities & JABBER_CAP_SI_FILE_XFER) {
		jabber_si_xfer_send_request(xfer);
	} else {
		char *msg = g_strdup_printf(_("Unable to send file to %s, user does not support file transfers"), who);
		purple_notify_error(js->gc, _("File Send Failed"),
				_("File Send Failed"), msg);
		g_free(msg);
	}
}

static void resource_select_cancel_cb(PurpleXfer *xfer, PurpleRequestFields *fields)
{
	purple_xfer_cancel_local(xfer);
}

static void do_transfer_send(PurpleXfer *xfer, const char *resource)
{
	JabberSIXfer *jsx = xfer->data;
	char **who_v = g_strsplit(xfer->who, "/", 2);
	char *who;

	who = g_strdup_printf("%s/%s", who_v[0], resource);
	g_strfreev(who_v);
	g_free(xfer->who);
	xfer->who = who;
	jabber_disco_info_do(jsx->js, who,
			jabber_si_xfer_send_disco_cb, xfer);
}

static void resource_select_ok_cb(PurpleXfer *xfer, PurpleRequestFields *fields)
{
	PurpleRequestField *field = purple_request_fields_get_field(fields, "resource");
	int selected_id = purple_request_field_choice_get_value(field);
	GList *labels = purple_request_field_choice_get_labels(field);

	const char *selected_label = g_list_nth_data(labels, selected_id);

	do_transfer_send(xfer, selected_label);
}

static void jabber_si_xfer_init(PurpleXfer *xfer)
{
	JabberSIXfer *jsx = xfer->data;
	JabberIq *iq;
	if(purple_xfer_get_type(xfer) == PURPLE_XFER_SEND) {
		JabberBuddy *jb;
		JabberBuddyResource *jbr = NULL;
		char *resource;

		if(NULL != (resource = jabber_get_resource(xfer->who))) {
			/* they've specified a resource, no need to ask or
			 * default or anything, just do it */

			do_transfer_send(xfer, resource);
			g_free(resource);
		}

		jb = jabber_buddy_find(jsx->js, xfer->who, TRUE);

		if(!jb || !jb->resources) {
			/* no resources online, we're trying to send to someone
			 * whose presence we're not subscribed to, or
			 * someone who is offline.  Let's inform the user */
			char *msg;

			if(!jb) {
				msg = g_strdup_printf(_("Unable to send file to %s, invalid JID"), xfer->who);
			} else if(jb->subscription & JABBER_SUB_TO) {
				msg = g_strdup_printf(_("Unable to send file to %s, user is not online"), xfer->who);
			} else {
				msg = g_strdup_printf(_("Unable to send file to %s, not subscribed to user presence"), xfer->who);
			}

			purple_notify_error(jsx->js->gc, _("File Send Failed"), _("File Send Failed"), msg);
			g_free(msg);
		} else if(g_list_length(jb->resources) == 1) {
			/* only 1 resource online (probably our most common case)
			 * so no need to ask who to send to */
			jbr = jb->resources->data;

			do_transfer_send(xfer, jbr->name);

		} else {
			/* we've got multiple resources, we need to pick one to send to */
			GList *l;
			char *msg = g_strdup_printf(_("Please select which resource of %s you would like to send a file to"), xfer->who);
			PurpleRequestFields *fields = purple_request_fields_new();
			PurpleRequestField *field = purple_request_field_choice_new("resource", _("Resource"), 0);
			PurpleRequestFieldGroup *group = purple_request_field_group_new(NULL);

			for(l = jb->resources; l; l = l->next)
			{
				jbr = l->data;

				purple_request_field_choice_add(field, jbr->name);
			}

			purple_request_field_group_add_field(group, field);

			purple_request_fields_add_group(fields, group);

			purple_request_fields(jsx->js->gc, _("Select a Resource"), msg, NULL, fields,
					_("Send File"), G_CALLBACK(resource_select_ok_cb), _("Cancel"), G_CALLBACK(resource_select_cancel_cb),
					jsx->js->gc->account, xfer->who, NULL, xfer);

			g_free(msg);
		}
	} else {
		xmlnode *si, *feature, *x, *field, *value;

		iq = jabber_iq_new(jsx->js, JABBER_IQ_RESULT);
		xmlnode_set_attrib(iq->node, "to", xfer->who);
		if(jsx->iq_id)
			jabber_iq_set_id(iq, jsx->iq_id);

		jsx->accepted = TRUE;

		si = xmlnode_new_child(iq->node, "si");
		xmlnode_set_namespace(si, "http://jabber.org/protocol/si");

		feature = xmlnode_new_child(si, "feature");
		xmlnode_set_namespace(feature, "http://jabber.org/protocol/feature-neg");

		x = xmlnode_new_child(feature, "x");
		xmlnode_set_namespace(x, "jabber:x:data");
		xmlnode_set_attrib(x, "type", "submit");

		field = xmlnode_new_child(x, "field");
		xmlnode_set_attrib(field, "var", "stream-method");

		value = xmlnode_new_child(field, "value");
		if(jsx->stream_method & STREAM_METHOD_BYTESTREAMS)
			xmlnode_insert_data(value, "http://jabber.org/protocol/bytestreams", -1);
		/*
		else if(jsx->stream_method & STREAM_METHOD_IBB)
		xmlnode_insert_data(value, "http://jabber.org/protocol/ibb", -1);
		*/

		jabber_iq_send(iq);
	}
}

PurpleXfer *jabber_si_new_xfer(PurpleConnection *gc, const char *who)
{
	JabberStream *js;

	PurpleXfer *xfer;
	JabberSIXfer *jsx;

	js = gc->proto_data;

	xfer = purple_xfer_new(gc->account, PURPLE_XFER_SEND, who);
	if (xfer)
	{
		xfer->data = jsx = g_new0(JabberSIXfer, 1);
		jsx->js = js;

		purple_xfer_set_init_fnc(xfer, jabber_si_xfer_init);
		purple_xfer_set_cancel_send_fnc(xfer, jabber_si_xfer_cancel_send);
		purple_xfer_set_end_fnc(xfer, jabber_si_xfer_end);

		js->file_transfers = g_list_append(js->file_transfers, xfer);
	}

	return xfer;
}

void jabber_si_xfer_send(PurpleConnection *gc, const char *who, const char *file)
{
	JabberStream *js;

	PurpleXfer *xfer;

	js = gc->proto_data;

	if(!purple_find_buddy(gc->account, who) || !jabber_buddy_find(js, who, FALSE))
		return;

	xfer = jabber_si_new_xfer(gc, who);

	if (file)
		purple_xfer_request_accepted(xfer, file);
	else
		purple_xfer_request(xfer);
}

void jabber_si_parse(JabberStream *js, xmlnode *packet)
{
	JabberSIXfer *jsx;
	PurpleXfer *xfer;
	xmlnode *si, *file, *feature, *x, *field, *option, *value;
	const char *stream_id, *filename, *filesize_c, *profile, *from;
	size_t filesize = 0;

	if(!(si = xmlnode_get_child(packet, "si")))
		return;

	if(!(profile = xmlnode_get_attrib(si, "profile")) ||
			strcmp(profile, "http://jabber.org/protocol/si/profile/file-transfer"))
		return;

	if(!(stream_id = xmlnode_get_attrib(si, "id")))
		return;

	if(!(file = xmlnode_get_child(si, "file")))
		return;

	if(!(filename = xmlnode_get_attrib(file, "name")))
		return;

	if((filesize_c = xmlnode_get_attrib(file, "size")))
		filesize = atoi(filesize_c);

	if(!(feature = xmlnode_get_child(si, "feature")))
		return;

	if(!(x = xmlnode_get_child_with_namespace(feature, "x", "jabber:x:data")))
		return;

	if(!(from = xmlnode_get_attrib(packet, "from")))
		return;

	/* if they've already sent us this file transfer with the same damn id
	 * then we're gonna ignore it, until I think of something better to do
	 * with it */
	if((xfer = jabber_si_xfer_find(js, stream_id, from)))
		return;

	jsx = g_new0(JabberSIXfer, 1);

	for(field = xmlnode_get_child(x, "field"); field; field = xmlnode_get_next_twin(field)) {
		const char *var = xmlnode_get_attrib(field, "var");
		if(var && !strcmp(var, "stream-method")) {
			for(option = xmlnode_get_child(field, "option"); option;
					option = xmlnode_get_next_twin(option)) {
				if((value = xmlnode_get_child(option, "value"))) {
					char *val;
					if((val = xmlnode_get_data(value))) {
						if(!strcmp(val, "http://jabber.org/protocol/bytestreams")) {
							jsx->stream_method |= STREAM_METHOD_BYTESTREAMS;
							/*
						} else if(!strcmp(val, "http://jabber.org/protocol/ibb")) {
							jsx->stream_method |= STREAM_METHOD_IBB;
							*/
						}
						g_free(val);
					}
				}
			}
		}
	}

	if(jsx->stream_method == STREAM_METHOD_UNKNOWN) {
		g_free(jsx);
		return;
	}

	jsx->js = js;
	jsx->stream_id = g_strdup(stream_id);
	jsx->iq_id = g_strdup(xmlnode_get_attrib(packet, "id"));

	xfer = purple_xfer_new(js->gc->account, PURPLE_XFER_RECEIVE, from);
	if (xfer)
	{
		xfer->data = jsx;

		purple_xfer_set_filename(xfer, filename);
		if(filesize > 0)
			purple_xfer_set_size(xfer, filesize);

		purple_xfer_set_init_fnc(xfer, jabber_si_xfer_init);
		purple_xfer_set_request_denied_fnc(xfer, jabber_si_xfer_request_denied);
		purple_xfer_set_cancel_recv_fnc(xfer, jabber_si_xfer_cancel_recv);
		purple_xfer_set_end_fnc(xfer, jabber_si_xfer_end);

		js->file_transfers = g_list_append(js->file_transfers, xfer);

		purple_xfer_request(xfer);
	}
}