switchboard.c

Linux下的多协议即时通讯程序源代码

		}
		else
		{
			str_reason = _("Message may have not been sent "
						   "because an unknown error occurred:");
		}

		body_str = msn_message_to_string(msg);
		body_enc = g_markup_escape_text(body_str, -1);
		g_free(body_str);

		format = msn_message_get_attr(msg, "X-MMS-IM-Format");
		msn_parse_format(format, &pre, &post);
		body_str = g_strdup_printf("%s%s%s", pre ? pre : "",
								   body_enc ? body_enc : "", post ? post : "");
		g_free(body_enc);
		g_free(pre);
		g_free(post);

		msn_switchboard_report_user(swboard, PURPLE_MESSAGE_ERROR,
									str_reason);
		msn_switchboard_report_user(swboard, PURPLE_MESSAGE_RAW,
									body_str);

		g_free(body_str);
	}

	/* If a timeout occures we will want the msg around just in case we
	 * receive the ACK after the timeout. */
	if (msg->ack_ref && error != MSN_MSG_ERROR_TIMEOUT)
	{
		swboard->ack_list = g_list_remove(swboard->ack_list, msg);
		msn_message_unref(msg);
	}
}

/**************************************************************************
 * Message Stuff
 **************************************************************************/

/** Called when a message times out. */
static void
msg_timeout(MsnCmdProc *cmdproc, MsnTransaction *trans)
{
	MsnMessage *msg;

	msg = trans->data;

	msg_error_helper(cmdproc, msg, MSN_MSG_ERROR_TIMEOUT);
}

/** Called when we receive an error of a message. */
static void
msg_error(MsnCmdProc *cmdproc, MsnTransaction *trans, int error)
{
	msg_error_helper(cmdproc, trans->data, MSN_MSG_ERROR_UNKNOWN);
}

#if 0
/** Called when we receive an ack of a special message. */
static void
msg_ack(MsnCmdProc *cmdproc, MsnCommand *cmd)
{
	MsnMessage *msg;

	msg = cmd->trans->data;

	if (msg->ack_cb != NULL)
		msg->ack_cb(msg->ack_data);

	msn_message_unref(msg);
}

/** Called when we receive a nak of a special message. */
static void
msg_nak(MsnCmdProc *cmdproc, MsnCommand *cmd)
{
	MsnMessage *msg;

	msg = cmd->trans->data;

	msn_message_unref(msg);
}
#endif

static void
release_msg(MsnSwitchBoard *swboard, MsnMessage *msg)
{
	MsnCmdProc *cmdproc;
	MsnTransaction *trans;
	char *payload;
	gsize payload_len;

	g_return_if_fail(swboard != NULL);
	g_return_if_fail(msg     != NULL);

	cmdproc = swboard->cmdproc;

	payload = msn_message_gen_payload(msg, &payload_len);

#ifdef MSN_DEBUG_SB
	msn_message_show_readable(msg, "SB SEND", FALSE);
#endif

	trans = msn_transaction_new(cmdproc, "MSG", "%c %d",
								msn_message_get_flag(msg), payload_len);

	/* Data for callbacks */
	msn_transaction_set_data(trans, msg);

	if (msg->type == MSN_MSG_TEXT)
	{
		msg->ack_ref = TRUE;
		msn_message_ref(msg);
		swboard->ack_list = g_list_append(swboard->ack_list, msg);
		msn_transaction_set_timeout_cb(trans, msg_timeout);
	}
	else if (msg->type == MSN_MSG_SLP)
	{
		msg->ack_ref = TRUE;
		msn_message_ref(msg);
		swboard->ack_list = g_list_append(swboard->ack_list, msg);
		msn_transaction_set_timeout_cb(trans, msg_timeout);
#if 0
		if (msg->ack_cb != NULL)
		{
			msn_transaction_add_cb(trans, "ACK", msg_ack);
			msn_transaction_add_cb(trans, "NAK", msg_nak);
		}
#endif
	}

	trans->payload = payload;
	trans->payload_len = payload_len;

	msg->trans = trans;

	msn_cmdproc_send_trans(cmdproc, trans);
}

static void
queue_msg(MsnSwitchBoard *swboard, MsnMessage *msg)
{
	g_return_if_fail(swboard != NULL);
	g_return_if_fail(msg     != NULL);

	purple_debug_info("msn", "Appending message to queue.\n");

	g_queue_push_tail(swboard->msg_queue, msg);

	msn_message_ref(msg);
}

static void
process_queue(MsnSwitchBoard *swboard)
{
	MsnMessage *msg;

	g_return_if_fail(swboard != NULL);

	purple_debug_info("msn", "Processing queue\n");

	while ((msg = g_queue_pop_head(swboard->msg_queue)) != NULL)
	{
		purple_debug_info("msn", "Sending message\n");
		release_msg(swboard, msg);
		msn_message_unref(msg);
	}
}

gboolean
msn_switchboard_can_send(MsnSwitchBoard *swboard)
{
	g_return_val_if_fail(swboard != NULL, FALSE);

	if (swboard->empty || !g_queue_is_empty(swboard->msg_queue))
		return FALSE;

	return TRUE;
}

void
msn_switchboard_send_msg(MsnSwitchBoard *swboard, MsnMessage *msg,
						 gboolean queue)
{
	g_return_if_fail(swboard != NULL);
	g_return_if_fail(msg     != NULL);

	if (msn_switchboard_can_send(swboard))
		release_msg(swboard, msg);
	else if (queue)
		queue_msg(swboard, msg);
}

/**************************************************************************
 * Switchboard Commands
 **************************************************************************/

static void
ans_cmd(MsnCmdProc *cmdproc, MsnCommand *cmd)
{
	MsnSwitchBoard *swboard;

	swboard = cmdproc->data;
	swboard->ready = TRUE;
}

static void
bye_cmd(MsnCmdProc *cmdproc, MsnCommand *cmd)
{
	MsnSwitchBoard *swboard;
	const char *user;

	swboard = cmdproc->data;
	user = cmd->params[0];

	/* cmdproc->data is set to NULL when the switchboard is destroyed;
	 * we may get a bye shortly thereafter. */
	g_return_if_fail(swboard != NULL);

	if (!(swboard->flag & MSN_SB_FLAG_IM) && (swboard->conv != NULL))
		purple_debug_error("msn_switchboard", "bye_cmd: helper bug\n");

	if (swboard->conv == NULL)
	{
		/* This is a helper switchboard */
		msn_switchboard_destroy(swboard);
	}
	else if ((swboard->current_users > 1) ||
			 (purple_conversation_get_type(swboard->conv) == PURPLE_CONV_TYPE_CHAT))
	{
		/* This is a switchboard used for a chat */
		purple_conv_chat_remove_user(PURPLE_CONV_CHAT(swboard->conv), user, NULL);
		swboard->current_users--;
		if (swboard->current_users == 0)
			msn_switchboard_destroy(swboard);
	}
	else
	{
		/* This is a switchboard used for a im session */
		msn_switchboard_destroy(swboard);
	}
}

static void
iro_cmd(MsnCmdProc *cmdproc, MsnCommand *cmd)
{
	PurpleAccount *account;
	PurpleConnection *gc;
	MsnSwitchBoard *swboard;

	account = cmdproc->session->account;
	gc = account->gc;
	swboard = cmdproc->data;

	swboard->total_users = atoi(cmd->params[2]);

	msn_switchboard_add_user(swboard, cmd->params[3]);
}

static void
joi_cmd(MsnCmdProc *cmdproc, MsnCommand *cmd)
{
	MsnSession *session;
	PurpleAccount *account;
	PurpleConnection *gc;
	MsnSwitchBoard *swboard;
	const char *passport;

	passport = cmd->params[0];

	session = cmdproc->session;
	account = session->account;
	gc = account->gc;
	swboard = cmdproc->data;

	msn_switchboard_add_user(swboard, passport);

	process_queue(swboard);

	if (!session->http_method)
		send_clientcaps(swboard);

	if (swboard->closed)
		msn_switchboard_close(swboard);
}

static void
msg_cmd_post(MsnCmdProc *cmdproc, MsnCommand *cmd, char *payload, size_t len)
{
	MsnMessage *msg;

	msg = msn_message_new_from_cmd(cmdproc->session, cmd);

	msn_message_parse_payload(msg, payload, len);
#ifdef MSN_DEBUG_SB
	msn_message_show_readable(msg, "SB RECV", FALSE);
#endif

	if (msg->remote_user != NULL)
		g_free (msg->remote_user);

	msg->remote_user = g_strdup(cmd->params[0]);
	msn_cmdproc_process_msg(cmdproc, msg);

	msn_message_destroy(msg);
}

static void
msg_cmd(MsnCmdProc *cmdproc, MsnCommand *cmd)
{
	cmdproc->servconn->payload_len = atoi(cmd->params[2]);
	cmdproc->last_cmd->payload_cb = msg_cmd_post;
}

static void
nak_cmd(MsnCmdProc *cmdproc, MsnCommand *cmd)
{
	MsnMessage *msg;

	msg = cmd->trans->data;
	g_return_if_fail(msg != NULL);

	msg_error_helper(cmdproc, msg, MSN_MSG_ERROR_NAK);
}

static void
ack_cmd(MsnCmdProc *cmdproc, MsnCommand *cmd)
{
	MsnSwitchBoard *swboard;
	MsnMessage *msg;

	msg = cmd->trans->data;

	if (msg->ack_cb != NULL)
		msg->ack_cb(msg, msg->ack_data);

	swboard = cmdproc->data;
	swboard->ack_list = g_list_remove(swboard->ack_list, msg);
	msn_message_unref(msg);
}

static void
out_cmd(MsnCmdProc *cmdproc, MsnCommand *cmd)
{
	PurpleConnection *gc;
	MsnSwitchBoard *swboard;

	gc = cmdproc->session->account->gc;
	swboard = cmdproc->data;

	if (swboard->current_users > 1)
		serv_got_chat_left(gc, swboard->chat_id);

	msn_switchboard_disconnect(swboard);
}

static void
usr_cmd(MsnCmdProc *cmdproc, MsnCommand *cmd)
{
	MsnSwitchBoard *swboard;

	swboard = cmdproc->data;

#if 0
	GList *l;

	for (l = swboard->users; l != NULL; l = l->next)
	{
		const char *user;
		user = l->data;

		msn_cmdproc_send(cmdproc, "CAL", "%s", user);
	}
#endif

	swboard->ready = TRUE;
	msn_cmdproc_process_queue(cmdproc);
}

/**************************************************************************
 * Message Handlers
 **************************************************************************/
static void
plain_msg(MsnCmdProc *cmdproc, MsnMessage *msg)
{
	PurpleConnection *gc;
	MsnSwitchBoard *swboard;
	const char *body;
	char *body_str;
	char *body_enc;
	char *body_final;
	size_t body_len;
	const char *passport;
	const char *value;

	gc = cmdproc->session->account->gc;
	swboard = cmdproc->data;

	body = msn_message_get_bin_data(msg, &body_len);
	body_str = g_strndup(body, body_len);
	body_enc = g_markup_escape_text(body_str, -1);
	g_free(body_str);

	passport = msg->remote_user;

	if (!strcmp(passport, "[e-mail]") &&
		strstr(body, "immediate security update"))
	{
		return;
	}

#if 0
	if ((value = msn_message_get_attr(msg, "User-Agent")) != NULL)
	{
		purple_debug_misc("msn", "User-Agent = '%s'\n", value);
	}
#endif

	if ((value = msn_message_get_attr(msg, "X-MMS-IM-Format")) != NULL)
	{
		char *pre, *post;

		msn_parse_format(value, &pre, &post);

		body_final = g_strdup_printf("%s%s%s", pre ? pre : "",
									 body_enc ? body_enc : "", post ? post : "");

		g_free(pre);
		g_free(post);
		g_free(body_enc);
	}
	else
	{
		body_final = body_enc;