add basic D-BUS configuration mechanism

Also move LookupDeviceIntRec into the DIX, and add InputOption type, and
NewInputDeviceRequest prototype (DIX requests DDX to add a device).  Does not
link without an implemented NIDR.

3 files changed, 312 insertions, 0 deletions

diff --git a/config/Makefile.am b/config/Makefile.am
new file mode 100644
index 000000000..1cc9109db
--- /dev/null
+++ b/config/Makefile.am
@@ -0,0 +1,10 @@
+AM_CFLAGS = @DIX_CFLAGS@
+
+dbusconfigdir = $(sysconfdir)/dbus-1/system.d
+dbusconfig_DATA = xorg-server.conf
+
+lib_LIBRARIES = libconfig.a
+
+libconfig_a_SOURCES = config.c
+
+EXTRA_DIST = xorg-server.conf
diff --git a/config/config.c b/config/config.c
new file mode 100644
index 000000000..b85b12028
--- /dev/null
+++ b/config/config.c
@@ -0,0 +1,289 @@
+/*
+ * Copyright © 2006 Daniel Stone
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the copyright holders and/or authors
+ * not be used in advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.  The copyright holders
+ * and/or authors make no representations about the suitability of this
+ * software for any purpose.  It is provided "as is" without express or
+ * implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS AND/OR AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD
+ * TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND/OR AUTHORS BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#ifdef HAVE_DBUS
+#define DBUS_API_SUBJECT_TO_CHANGE
+#include <dbus/dbus.h>
+#include <string.h>
+#include "opaque.h" /* for 'display': there has to be a better way */
+                    /* the above comment lies.  there is no better way. */
+#include "input.h"
+#include "config.h"
+
+#define MATCH_RULE "type='method_call',interface='org.x.config.input'"
+
+static DBusConnection *configConnection = NULL;
+static int configfd = -1;
+static char busobject[32] = { 0 };
+static char busname[64] = { 0 };
+
+void
+configDispatch()
+{
+    if (!configConnection)
+        return;
+
+    dbus_connection_read_write_dispatch(configConnection, 0);
+}
+
+static DBusHandlerResult
+configMessage(DBusConnection *connection, DBusMessage *message, void *closure)
+{
+    InputOption *option = NULL, *ret = NULL;
+    DBusMessageIter iter, subiter;
+    DBusError error;
+    char *tmp = NULL;
+    int deviceid = -1;
+    DeviceIntPtr pDev = NULL;
+
+    ErrorF("[dbus] new message!\n");
+    ErrorF("       source: %s\n", dbus_message_get_sender(message));
+    ErrorF("       destination: %s\n", dbus_message_get_destination(message));
+    ErrorF("       signature: %s\n", dbus_message_get_signature(message));
+    ErrorF("       path: %s\n", dbus_message_get_path(message));
+    ErrorF("       interface: %s\n", dbus_message_get_interface(message));
+    ErrorF("       member: %s\n", dbus_message_get_member(message));
+    ErrorF("       method call? %s\n", (dbus_message_get_type(message) ==
+                                         DBUS_MESSAGE_TYPE_METHOD_CALL) ?
+                                        "yes" : "no");
+
+    dbus_error_init(&error);
+
+    if (strcmp(dbus_message_get_interface(message),
+               "org.x.config.input") == 0) {
+        if (!dbus_message_iter_init(message, &iter)) {
+            ErrorF("failed to init iterator! this is probably bad.\n");
+            dbus_error_free(&error);
+            return DBUS_HANDLER_RESULT_NEED_MEMORY; /* ?? */
+        }
+        if (strcmp(dbus_message_get_member(message), "add") == 0) {
+            ErrorF("       we want to add a device!\n");
+            /* signature should be [ss][ss]... */
+            while (dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_ARRAY) {
+                option = (InputOption *)xcalloc(sizeof(InputOption), 1);
+                if (!option) {
+                    while (ret) {
+                        option = ret;
+                        ret = ret->next;
+                        xfree(option);
+                    }
+                    dbus_error_free(&error);
+                    return DBUS_HANDLER_RESULT_NEED_MEMORY;
+                }
+
+                dbus_message_iter_recurse(&iter, &subiter);
+
+                if (dbus_message_iter_get_arg_type(&subiter) !=
+                    DBUS_TYPE_STRING) {
+                    ErrorF("couldn't get the arg type\n");
+                    xfree(option);
+                    dbus_error_free(&error);
+                    return DBUS_HANDLER_RESULT_HANDLED;
+                }
+                dbus_message_iter_get_basic(&subiter, &tmp);
+                if (!tmp) {
+                    ErrorF("couldn't get the key!\n");
+                    xfree(option);
+                    break;
+                }
+                option->key = xstrdup(tmp);
+                if (!option->key) {
+                    ErrorF("couldn't duplicate the key!\n");
+                    xfree(option);
+                    break;
+                }
+
+                if (!dbus_message_iter_has_next(&subiter)) {
+                    ErrorF("broken message: no next\n");
+                    xfree(option->key);
+                    xfree(option);
+                    dbus_error_free(&error);
+                    return DBUS_HANDLER_RESULT_HANDLED;
+                }
+                dbus_message_iter_next(&subiter);
+
+                if (dbus_message_iter_get_arg_type(&subiter) !=
+                    DBUS_TYPE_STRING) {
+                    ErrorF("couldn't get the arg type\n");
+                    xfree(option);
+                    dbus_error_free(&error);
+                    return DBUS_HANDLER_RESULT_HANDLED;
+                }
+                dbus_message_iter_get_basic(&subiter, &tmp);
+                if (!tmp) {
+                    ErrorF("couldn't get the value!\n");
+                    xfree(option->key);
+                    xfree(option);
+                    break;
+                }
+                option->value = xstrdup(tmp);
+                if (!option->value) {
+                    ErrorF("couldn't duplicate the option!\n");
+                    xfree(option->value);
+                    xfree(option);
+                    break;
+                }
+
+                option->next = ret;
+                ret = option;
+                dbus_message_iter_next(&iter);
+            }
+
+            if (NewInputDeviceRequest(ret) != Success) {
+                ErrorF("[config] NIDR failed\n");
+            }
+            dbus_error_free(&error);
+            return DBUS_HANDLER_RESULT_HANDLED;
+        }
+        else if (strcmp(dbus_message_get_member(message), "remove") == 0) {
+            ErrorF("        we want to remove a device!\n");
+            if (!dbus_message_get_args(message, &error, DBUS_TYPE_INT32,
+                                       &deviceid, DBUS_TYPE_INVALID)) {
+                ErrorF("couldn't get args: %s %s\n", error.name, error.message);
+                dbus_error_free(&error);
+                return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+            }
+            if (deviceid < 0 || !(pDev = LookupDeviceIntRec(deviceid))) {
+                ErrorF("bogus device id %d\n", deviceid);
+                dbus_error_free(&error);
+                return DBUS_HANDLER_RESULT_HANDLED;
+            }
+            ErrorF("pDev is %p\n", pDev);
+            RemoveDevice(pDev);
+            dbus_error_free(&error);
+            return DBUS_HANDLER_RESULT_HANDLED;
+        }
+    }
+
+    dbus_error_free(&error);
+
+    return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+}
+
+void
+configInitialise()
+{
+    DBusConnection *bus = NULL;
+    DBusError error;
+    DBusObjectPathVTable vtable;
+
+    configConnection = NULL;
+
+    dbus_error_init(&error);
+    bus = dbus_bus_get(DBUS_BUS_SYSTEM, &error);
+    if (!bus || dbus_error_is_set(&error)) {
+        ErrorF("[dbus] some kind of error occurred: %s (%s)\n", error.name,
+                error.message);
+        dbus_error_free(&error);
+        return;
+    }
+
+    if (!dbus_connection_get_unix_fd(bus, &configfd)) {
+        ErrorF("[dbus] couldn't get fd for bus\n");
+        dbus_connection_close(bus);
+        configfd = -1;
+        return;
+    }
+
+    snprintf(busname, sizeof(busname), "org.x.config.display%d", atoi(display));
+    if (!dbus_bus_request_name(bus, busname, 0, &error) ||
+        dbus_error_is_set(&error)) {
+        ErrorF("[dbus] couldn't take over org.x.config: %s (%s)\n",
+               error.name, error.message);
+        dbus_error_free(&error);
+        dbus_connection_close(bus);
+        configfd = -1;
+        return;
+    }
+
+    /* blocks until we get a reply. */
+    dbus_bus_add_match(bus, MATCH_RULE, &error);
+    if (dbus_error_is_set(&error)) {
+        ErrorF("[dbus] couldn't match X.Org rule: %s (%s)\n", error.name,
+               error.message);
+        dbus_error_free(&error);
+        dbus_bus_release_name(bus, busname, &error);
+        dbus_connection_close(bus);
+        configfd = -1;
+        return;
+    }
+
+    vtable.message_function = configMessage;
+    snprintf(busobject, sizeof(busobject), "/org/x/config/%d", atoi(display));
+    if (!dbus_connection_register_object_path(bus, busobject, &vtable, NULL)) {
+        ErrorF("[dbus] couldn't register object path\n");
+        configfd = -1;
+        dbus_bus_release_name(bus, busname, &error);
+        dbus_bus_remove_match(bus, MATCH_RULE, &error);
+        dbus_connection_close(bus);
+        configfd = -1;
+        return;
+    }
+    ErrorF("[dbus] registered object path %s\n", busobject);
+
+    ErrorF("[dbus] registered and listening\n");
+
+    dbus_error_free(&error);
+
+    configConnection = bus;
+
+    AddGeneralSocket(configfd);
+}
+
+void
+configFini()
+{
+    DBusError error;
+
+    if (configConnection) {
+        dbus_error_init(&error);
+        ErrorF("configFini being called\n");
+        dbus_bus_remove_match(configConnection, MATCH_RULE, &error);
+        dbus_bus_release_name(configConnection, busname, &error);
+        dbus_connection_close(configConnection);
+        RemoveGeneralSocket(configfd);
+        configConnection = NULL;
+        configfd = -1;
+        dbus_error_free(&error);
+    }
+}
+#else
+void
+configDispatch()
+{
+}
+
+void
+configInitialise()
+{
+}
+
+void
+configFini()
+{
+}
+#endif
diff --git a/config/xorg-server.conf b/config/xorg-server.conf
new file mode 100644
index 000000000..47a9a7824
--- /dev/null
+++ b/config/xorg-server.conf
@@ -0,0 +1,13 @@
+<!DOCTYPE busconfig PUBLIC
+ "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
+ "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
+<busconfig>
+	<policy context="default">
+		<allow own="org.x.config.display0"/>
+		<allow send_destination="org.x.config.display0"/>
+		<allow send_interface="org.x.config.display0"/>
+		<allow own="org.x.config.display1"/>
+		<allow send_destination="org.x.config.display1"/>
+		<allow send_interface="org.x.config.display1"/>
+	</policy>
+</busconfig>