350 lines
10 KiB
C
350 lines
10 KiB
C
/*
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* Copyright © 2006 Daniel Stone
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of the copyright holders and/or authors
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* not be used in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. The copyright holders
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* and/or authors make no representations about the suitability of this
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* software for any purpose. It is provided "as is" without express or
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* implied warranty.
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*
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* THE COPYRIGHT HOLDERS AND/OR AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD
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* TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND/OR AUTHORS BE LIABLE
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* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#ifdef HAVE_DBUS
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#define DBUS_API_SUBJECT_TO_CHANGE
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#include <dbus/dbus.h>
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#include <string.h>
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#include <X11/X.h>
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#include "opaque.h" /* for 'display': there has to be a better way */
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/* the above comment lies. there is no better way. */
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#include "input.h"
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#include "inputstr.h"
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#include "config.h"
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#include "os.h"
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#define MATCH_RULE "type='method_call',interface='org.x.config.input'"
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#define MALFORMED_MSG "[config] malformed message, dropping"
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#define MALFORMED_MESSAGE() { DebugF(MALFORMED_MSG "\n"); \
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ret = BadValue; \
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goto unwind; }
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#define MALFORMED_MESSAGE_ERROR() { DebugF(MALFORMED_MSG ": %s, %s", \
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error->name, error->message); \
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ret = BadValue; \
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goto unwind; }
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static DBusConnection *configConnection = NULL;
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static int configfd = -1;
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static char busobject[32] = { 0 };
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static char busname[64] = { 0 };
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void
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configDispatch()
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{
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if (!configConnection)
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return;
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dbus_connection_read_write_dispatch(configConnection, 0);
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}
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static int
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configAddDevice(DBusMessage *message, DBusMessageIter *iter, DBusError *error)
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{
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DBusMessageIter subiter;
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InputOption *tmpo = NULL, *options = NULL;
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char *tmp = NULL;
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int ret = BadMatch;
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DebugF("[config] adding device\n");
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/* signature should be [ss][ss]... */
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options = (InputOption *) xcalloc(sizeof(InputOption), 1);
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if (!options) {
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ErrorF("[config] couldn't allocate option\n");
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return BadAlloc;
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}
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options->key = xstrdup("_source");
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options->value = xstrdup("client/dbus");
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while (dbus_message_iter_get_arg_type(iter) == DBUS_TYPE_ARRAY) {
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tmpo = (InputOption *) xcalloc(sizeof(InputOption), 1);
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if (!tmpo) {
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ErrorF("[config] couldn't allocate option\n");
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ret = BadAlloc;
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goto unwind;
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}
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dbus_message_iter_recurse(iter, &subiter);
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if (dbus_message_iter_get_arg_type(&subiter) != DBUS_TYPE_STRING)
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MALFORMED_MESSAGE();
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dbus_message_iter_get_basic(&subiter, &tmp);
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if (!tmp)
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MALFORMED_MESSAGE();
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if (tmp[0] == '_') {
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ErrorF("[config] attempted subterfuge: option name %s given\n",
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tmp);
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MALFORMED_MESSAGE();
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}
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tmpo->key = xstrdup(tmp);
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if (!tmpo->key) {
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ErrorF("[config] couldn't duplicate key!\n");
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ret = BadAlloc;
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goto unwind;
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}
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if (!dbus_message_iter_has_next(&subiter))
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MALFORMED_MESSAGE();
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dbus_message_iter_next(&subiter);
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if (dbus_message_iter_get_arg_type(&subiter) != DBUS_TYPE_STRING)
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MALFORMED_MESSAGE();
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dbus_message_iter_get_basic(&subiter, &tmp);
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if (!tmp)
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MALFORMED_MESSAGE();
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tmpo->value = xstrdup(tmp);
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if (!tmpo->value) {
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ErrorF("[config] couldn't duplicate option!\n");
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ret = BadAlloc;
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goto unwind;
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}
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tmpo->next = options;
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options = tmpo;
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dbus_message_iter_next(iter);
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}
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ret = NewInputDeviceRequest(options);
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if (ret != Success)
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DebugF("[config] NewInputDeviceRequest failed\n");
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return ret;
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unwind:
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if (tmpo->key)
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xfree(tmpo->key);
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if (tmpo->value)
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xfree(tmpo->value);
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if (tmpo)
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xfree(tmpo);
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while (options) {
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tmpo = options;
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options = options->next;
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if (tmpo->key)
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xfree(tmpo->key);
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if (tmpo->value)
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xfree(tmpo->value);
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xfree(tmpo);
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}
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return ret;
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}
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static int
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configRemoveDevice(DBusMessage *message, DBusMessageIter *iter,
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DBusError *error)
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{
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int deviceid = -1;
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int ret = BadMatch;
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DeviceIntPtr pDev = NULL;
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if (!dbus_message_get_args(message, error, DBUS_TYPE_INT32,
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&deviceid, DBUS_TYPE_INVALID)) {
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MALFORMED_MESSAGE_ERROR();
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}
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if (deviceid < 0 || !(pDev = LookupDeviceIntRec(deviceid))) {
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DebugF("[config] bogus device id %d given\n", deviceid);
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ret = BadMatch;
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goto unwind;
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}
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DebugF("[config] removing device %s (id %d)\n", pDev->name, deviceid);
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/* Call PIE here so we don't try to dereference a device that's
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* already been removed. */
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OsBlockSignals();
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ProcessInputEvents();
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RemoveDevice(pDev);
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OsReleaseSignals();
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return Success;
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unwind:
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return ret;
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}
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static DBusHandlerResult
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configMessage(DBusConnection *connection, DBusMessage *message, void *closure)
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{
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DBusMessageIter iter;
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DBusError error;
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DBusMessage *reply;
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DBusConnection *bus = closure;
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int ret = BadDrawable; /* nonsensical value */
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dbus_error_init(&error);
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if (strcmp(dbus_message_get_interface(message),
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"org.x.config.input") == 0) {
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if (!dbus_message_iter_init(message, &iter)) {
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ErrorF("[config] failed to init iterator\n");
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dbus_error_free(&error);
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return DBUS_HANDLER_RESULT_NEED_MEMORY; /* ?? */
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}
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if (strcmp(dbus_message_get_member(message), "add") == 0)
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ret = configAddDevice(message, &iter, &error);
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else if (strcmp(dbus_message_get_member(message), "remove") == 0)
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ret = configRemoveDevice(message, &iter, &error);
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}
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if (ret != BadDrawable && ret != BadAlloc) {
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reply = dbus_message_new_method_return(message);
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dbus_message_iter_init_append(reply, &iter);
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if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_INT32, &ret)) {
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ErrorF("[config] couldn't append to iterator\n");
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dbus_error_free(&error);
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return DBUS_HANDLER_RESULT_HANDLED;
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}
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if (!dbus_connection_send(bus, reply, NULL))
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ErrorF("[config] failed to send reply\n");
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dbus_connection_flush(bus);
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dbus_message_unref(reply);
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}
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dbus_error_free(&error);
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if (ret == BadAlloc)
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return DBUS_HANDLER_RESULT_NEED_MEMORY;
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else if (ret == BadDrawable)
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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else
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return DBUS_HANDLER_RESULT_HANDLED;
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}
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void
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configInitialise()
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{
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DBusConnection *bus = NULL;
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DBusError error;
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DBusObjectPathVTable vtable = { .message_function = configMessage };
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configConnection = NULL;
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dbus_error_init(&error);
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bus = dbus_bus_get(DBUS_BUS_SYSTEM, &error);
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if (!bus || dbus_error_is_set(&error)) {
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dbus_error_free(&error);
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FatalError("[dbus] some kind of error occurred: %s (%s)\n", error.name,
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error.message);
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return;
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}
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if (!dbus_connection_get_unix_fd(bus, &configfd)) {
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dbus_connection_unref(bus);
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configfd = -1;
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FatalError("[dbus] couldn't get fd for bus\n");
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return;
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}
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snprintf(busname, sizeof(busname), "org.x.config.display%d", atoi(display));
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if (!dbus_bus_request_name(bus, busname, 0, &error) ||
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dbus_error_is_set(&error)) {
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dbus_error_free(&error);
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dbus_connection_unref(bus);
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configfd = -1;
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FatalError("[dbus] couldn't take over org.x.config: %s (%s)\n",
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error.name, error.message);
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return;
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}
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/* blocks until we get a reply. */
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dbus_bus_add_match(bus, MATCH_RULE, &error);
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if (dbus_error_is_set(&error)) {
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dbus_error_free(&error);
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dbus_bus_release_name(bus, busname, &error);
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dbus_connection_unref(bus);
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configfd = -1;
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FatalError("[dbus] couldn't match X.Org rule: %s (%s)\n", error.name,
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error.message);
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return;
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}
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snprintf(busobject, sizeof(busobject), "/org/x/config/%d", atoi(display));
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if (!dbus_connection_register_object_path(bus, busobject, &vtable, bus)) {
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configfd = -1;
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dbus_bus_release_name(bus, busname, &error);
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dbus_bus_remove_match(bus, MATCH_RULE, &error);
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dbus_connection_unref(bus);
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FatalError("[dbus] couldn't register object path\n");
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return;
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}
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DebugF("[dbus] registered object path %s\n", busobject);
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dbus_error_free(&error);
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configConnection = bus;
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AddGeneralSocket(configfd);
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}
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void
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configFini()
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{
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DBusError error;
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if (configConnection) {
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dbus_error_init(&error);
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dbus_connection_unregister_object_path(configConnection, busobject);
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dbus_bus_remove_match(configConnection, MATCH_RULE, &error);
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dbus_bus_release_name(configConnection, busname, &error);
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dbus_connection_unref(configConnection);
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RemoveGeneralSocket(configfd);
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configConnection = NULL;
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configfd = -1;
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dbus_error_free(&error);
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}
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}
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#else /* !HAVE_DBUS */
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void
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configDispatch()
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{
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}
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void
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configInitialise()
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{
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}
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void
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configFini()
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{
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}
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#endif /* HAVE_DBUS */
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