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/*
Authors:
Pavel Březina <pbrezina@redhat.com>
Copyright (C) 2014 Red Hat
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <talloc.h>
#include <dbus/dbus.h>
#include "util/util.h"
#include "sbus/sssd_dbus.h"
#include "sbus/sssd_dbus_private.h"
DBusObjectPathVTable dbus_object_path_vtable =
{ NULL, sbus_message_handler, NULL, NULL, NULL, NULL };
static char *sbus_iface_get_reg_path(TALLOC_CTX *mem_ctx,
const char *path,
bool fallback)
{
char *reg_path;
reg_path = talloc_strdup(mem_ctx, path);
if (reg_path == NULL) return NULL;
if (fallback) {
reg_path[strlen(path)-1] = '\0';
}
return reg_path;
}
static bool path_in_interface_list(struct sbus_interface_p *list,
const char *path)
{
struct sbus_interface_p *iter;
if (!list || !path) {
return false;
}
iter = list;
while (iter != NULL) {
if (strcmp(iter->intf->path, path) == 0) {
return true;
}
iter = iter->next;
}
return false;
}
void sbus_unreg_object_paths(struct sbus_connection *conn)
{
struct sbus_interface_p *iter = conn->intf_list;
while (iter != NULL) {
dbus_connection_unregister_object_path(conn->dbus.conn,
iter->intf->path);
iter = iter->next;
}
}
static bool sbus_fb_path_has_prefix(const char *path, const char *prefix)
{
/* strlen-1 because we don't want to match the trailing '*' */
if (strncmp(path, prefix, strlen(prefix)-1) == 0) {
return true;
}
return false;
}
static bool sbus_path_has_fallback(const char *path)
{
char *wildcard;
wildcard = strrchr(path, '*');
if (wildcard != NULL) {
/* This path was registered as fallback */
if (*(wildcard + 1) != '\0') {
/* Wildcard is only allowed as the last character in the path */
return false;
}
return true;
}
return false;
}
bool sbus_iface_handles_path(struct sbus_interface_p *intf_p,
const char *path)
{
if (sbus_path_has_fallback(intf_p->intf->path)) {
return sbus_fb_path_has_prefix(path, intf_p->intf->path);
}
return strcmp(path, intf_p->intf->path) == 0;
}
static struct sbus_interface *
sbus_new_interface(TALLOC_CTX *mem_ctx,
const char *object_path,
struct sbus_vtable *iface_vtable,
void *instance_data)
{
struct sbus_interface *intf;
intf = talloc_zero(mem_ctx, struct sbus_interface);
if (intf == NULL) {
DEBUG(SSSDBG_FATAL_FAILURE, "Cannot allocate a new sbus_interface.\n");
return NULL;
}
intf->path = talloc_strdup(intf, object_path);
if (intf->path == NULL) {
DEBUG(SSSDBG_FATAL_FAILURE, "Cannot duplicate object path.\n");
talloc_free(intf);
return NULL;
}
intf->vtable = iface_vtable;
intf->instance_data = instance_data;
return intf;
}
int sbus_conn_register_iface(struct sbus_connection *conn,
struct sbus_vtable *iface_vtable,
const char *object_path,
void *pvt)
{
struct sbus_interface_p *intf_p;
struct sbus_interface *intf;
dbus_bool_t dbret;
const char *path;
bool fallback;
intf = sbus_new_interface(conn, object_path, iface_vtable, pvt);
if (intf == NULL) {
return ENOMEM;
}
if (!conn || !intf->vtable || !intf->vtable->meta) {
return EINVAL;
}
path = intf->path;
fallback = sbus_path_has_fallback(path);
if (path_in_interface_list(conn->intf_list, path)) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Cannot add method context with identical path.\n");
return EINVAL;
}
intf_p = talloc_zero(conn, struct sbus_interface_p);
if (!intf_p) {
return ENOMEM;
}
intf_p->conn = conn;
intf_p->intf = intf;
intf_p->reg_path = sbus_iface_get_reg_path(intf_p, path, fallback);
if (intf_p->reg_path == NULL) {
return ENOMEM;
}
DLIST_ADD(conn->intf_list, intf_p);
DEBUG(SSSDBG_TRACE_LIBS, "Will register path %s with%s fallback\n",
intf_p->reg_path, fallback ? "" : "out");
if (fallback) {
dbret = dbus_connection_register_fallback(conn->dbus.conn,
intf_p->reg_path,
&dbus_object_path_vtable,
intf_p);
} else {
dbret = dbus_connection_register_object_path(conn->dbus.conn,
intf_p->reg_path,
&dbus_object_path_vtable,
intf_p);
}
if (!dbret) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Could not register object path to the connection.\n");
return ENOMEM;
}
return EOK;
}
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