/*
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 <dhash.h>
#include "util/util.h"
#include "sbus/sssd_dbus.h"
#include "sbus/sssd_dbus_meta.h"
#include "sbus/sssd_dbus_private.h"
static struct sbus_interface *
sbus_iface_list_lookup(struct sbus_interface_list *list,
const char *iface)
{
struct sbus_interface_list *item;
DLIST_FOR_EACH(item, list) {
if (strcmp(item->interface->vtable->meta->name, iface) == 0) {
return item->interface;
}
}
return NULL;
}
static errno_t
sbus_iface_list_copy(TALLOC_CTX *mem_ctx,
struct sbus_interface_list *list,
struct sbus_interface_list **_copy)
{
TALLOC_CTX *list_ctx;
struct sbus_interface_list *new_list = NULL;
struct sbus_interface_list *new_item;
struct sbus_interface_list *item;
errno_t ret;
if (list == NULL) {
*_copy = NULL;
return EOK;
}
list_ctx = talloc_new(mem_ctx);
if (list_ctx == NULL) {
return ENOMEM;
}
DLIST_FOR_EACH(item, list) {
if (sbus_iface_list_lookup(new_list,
item->interface->vtable->meta->name) != NULL) {
/* already in list */
continue;
}
new_item = talloc_zero(list_ctx, struct sbus_interface_list);
if (new_item == NULL) {
ret = ENOMEM;
goto done;
}
new_item->interface = item->interface;
DLIST_ADD(new_list, new_item);
}
*_copy = new_list;
ret = EOK;
done:
if (ret != EOK) {
talloc_free(list_ctx);
}
return ret;
}
/**
* Object paths that represent all objects under the path:
* /org/object/path/~* (without tilda)
*/
static bool sbus_opath_is_subtree(const char *path)
{
size_t len;
len = strlen(path);
if (len < 2) {
return false;
}
return path[len - 2] == '/' && path[len - 1] == '*';
}
/**
* If the path represents a subtree object path, this function will
* remove /~* from the end.
*/
static char *sbus_opath_get_base_path(TALLOC_CTX *mem_ctx,
const char *object_path)
{
char *tree_path;
size_t len;
tree_path = talloc_strdup(mem_ctx, object_path);
if (tree_path == NULL) {
return NULL;
}
if (!sbus_opath_is_subtree(tree_path)) {
return tree_path;
}
/* replace / only if it is not a root path (only slash) */
len = strlen(tree_path);
tree_path[len - 1] = '\0';
tree_path[len - 2] = (len - 2 != 0) ? '\0' : '/';
return tree_path;
}
static char *sbus_opath_parent_subtree(TALLOC_CTX *mem_ctx,
const char *path)
{
char *subtree;
char *slash;
/* first remove /~* from the end, stop when we have reached the root i.e.
* subtree == "/" */
subtree = sbus_opath_get_base_path(mem_ctx, path);
if (subtree == NULL || subtree[1] == '\0') {
return NULL;
}
/* Find the first separator and replace the part with asterisk. */
slash = strrchr(subtree, '/');
if (slash == NULL) {
/* we cannot continue up */
talloc_free(subtree);
return NULL;
}
if (*(slash + 1) == '\0') {
/* this object path is invalid since it cannot end with slash */
DEBUG(SSSDBG_CRIT_FAILURE, "Invalid object path '%s'?\n", path);
talloc_free(subtree);
return NULL;
}
/* because object path cannot end with / there is enough space for
* asterisk and terminating zero */
*(slash + 1) = '*';
*(slash + 2) = '\0';
return subtree;
}
/**
* The following path related functions are based on similar code in
* storaged, just tailored to use talloc instead of glib
*/
char *
sbus_opath_escape_part(TALLOC_CTX *mem_ctx,
const char *object_path_part)
{
size_t n;
char *safe_path = NULL;
TALLOC_CTX *tmp_ctx = NULL;
/* The path must be valid */
if (object_path_part == NULL) {
return NULL;
}
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
return NULL;
}
safe_path = talloc_strdup(tmp_ctx, "");
if (safe_path == NULL) {
goto done;
}
/* Special case for an empty string */
if (strcmp(object_path_part, "") == 0) {
/* the for loop would just fall through */
safe_path = talloc_asprintf_append_buffer(safe_path, "_");
if (safe_path == NULL) {
goto done;
}
}
for (n = 0; object_path_part[n]; n++) {
int c = object_path_part[n];
/* D-Bus spec says:
* *
* * Each element must only contain the ASCII characters
* "[A-Z][a-z][0-9]_"
* */
if ((c >= 'A' && c <= 'Z')
|| (c >= 'a' && c <= 'z')
|| (c >= '0' && c <= '9')) {
safe_path = talloc_asprintf_append_buffer(safe_path, "%c", c);
if (safe_path == NULL) {
goto done;
}
} else {
safe_path = talloc_asprintf_append_buffer(safe_path, "_%02x", c);
if (safe_path == NULL) {
goto done;
}
}
}
safe_path = talloc_steal(mem_ctx, safe_path);
done:
talloc_free(tmp_ctx);
return safe_path;
}
static inline int unhexchar(char c)
{
if (c >= '0' && c <= '9') {
return c - '0';
}
if (c >= 'a' && c <= 'f') {
return c - 'a' + 10;
}
if (c >= 'A' && c <= 'F') {
return c - 'A' + 10;
}
return -1;
}
char *
sbus_opath_unescape_part(TALLOC_CTX *mem_ctx,
const char *object_path_part)
{
char *safe_path;
const char *p;
int a, b, c;
TALLOC_CTX *tmp_ctx = NULL;
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
return NULL;
}
safe_path = talloc_strdup(tmp_ctx, "");
if (safe_path == NULL) {
goto done;
}
/* Special case for the empty string */
if (strcmp(object_path_part, "_") == 0) {
safe_path = talloc_steal(mem_ctx, safe_path);
goto done;
}
for (p = object_path_part; *p; p++) {
if (*p == '_') {
/* There must be at least two more chars after underscore */
if (p[1] == '\0' || p[2] == '\0') {
safe_path = NULL;
goto done;
}
if ((a = unhexchar(p[1])) < 0
|| (b = unhexchar(p[2])) < 0) {
/* Invalid escape code, let's take it literal then */
c = '_';
} else {
c = ((a << 4) | b);
p += 2;
}
} else {
c = *p;
}
safe_path = talloc_asprintf_append_buffer(safe_path, "%c", c);
if (safe_path == NULL) {
goto done;
}
}
safe_path = talloc_steal(mem_ctx, safe_path);
done:
talloc_free(tmp_ctx);
return safe_path;
}
char *
_sbus_opath_compose(TALLOC_CTX *mem_ctx,
const char *base,
const char *part, ...)
{
char *safe_part;
char *path = NULL;
va_list va;
if (base == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "Wrong object path base!\n");
return NULL;
}
path = talloc_strdup(mem_ctx, base);
if (path == NULL) return NULL;
va_start(va, part);
while (part != NULL) {
safe_part = sbus_opath_escape_part(mem_ctx, part);
if (safe_part == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "Could not add [%s] to objpath\n", part);
goto fail;
}
path = talloc_asprintf_append(path, "/%s", safe_part);
talloc_free(safe_part);
if (path == NULL) {
goto fail;
}
part = va_arg(va, const char *);
}
va_end(va);
return path;
fail:
va_end(va);
talloc_free(path);
return NULL;
}
errno_t
sbus_opath_decompose(TALLOC_CTX *mem_ctx,
const char *object_path,
const char *prefix,
char ***_components,
size_t *_len)
{
TALLOC_CTX *tmp_ctx;
const char *path;
char **decomposed;
char **unescaped;
errno_t ret;
int len;
int i;
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
return ENOMEM;
}
/* Strip prefix from the path. */
if (prefix != NULL) {
path = sbus_opath_strip_prefix(object_path, prefix);
if (path == NULL) {
ret = ERR_SBUS_INVALID_PATH;
goto done;
}
} else {
path = object_path;
}
/* Split the string using / as delimiter. */
split_on_separator(tmp_ctx, path, '/', true, true, &decomposed, &len);
/* Unescape parts. */
unescaped = talloc_zero_array(tmp_ctx, char *, len + 1);
if (unescaped == NULL) {
ret = ENOMEM;
goto done;
}
for (i = 0; i < len; i++) {
unescaped[i] = sbus_opath_unescape_part(unescaped, decomposed[i]);
if (unescaped[i] == NULL) {
ret = ENOMEM;
goto done;
}
}
if (_components != NULL) {
*_components = talloc_steal(mem_ctx, unescaped);
}
if (_len != NULL) {
*_len = len;
}
ret = EOK;
done:
talloc_free(tmp_ctx);
return ret;
}
errno_t
sbus_opath_decompose_exact(TALLOC_CTX *mem_ctx,
const char *object_path,
const char *prefix,
size_t expected,
char ***_components)
{
char **components;
size_t len;
errno_t ret;
ret = sbus_opath_decompose(mem_ctx, object_path, prefix,
&components, &len);
if (ret != EOK) {
return ret;
}
if (len != expected) {
talloc_free(components);
return ERR_SBUS_INVALID_PATH;
}
if (_components != NULL) {
*_components = components;
}
return EOK;
}
const char *
sbus_opath_strip_prefix(const char *object_path,
const char *prefix)
{
if (strncmp(object_path, prefix, strlen(prefix)) == 0) {
return object_path + strlen(prefix);
}
return NULL;
}
char *
sbus_opath_get_object_name(TALLOC_CTX *mem_ctx,
const char *object_path,
const char *base_path)
{
const char *name;
name = sbus_opath_strip_prefix(object_path, base_path);
if (name == NULL || name[0] == '\0') {
return NULL;
}
/* if base_path did not end with / */
if (name[0] == '/') {
name = name + 1;
}
return sbus_opath_unescape_part(mem_ctx, name);
}
static void
sbus_opath_hash_delete_cb(hash_entry_t *item,
hash_destroy_enum deltype,
void *pvt)
{
struct sbus_connection *conn;
char *path;
conn = talloc_get_type(pvt, struct sbus_connection);
path = sbus_opath_get_base_path(NULL, item->key.str);
dbus_connection_unregister_object_path(conn->dbus.conn, path);
}
errno_t
sbus_opath_hash_init(TALLOC_CTX *mem_ctx,
struct sbus_connection *conn,
hash_table_t **_table)
{
return sss_hash_create_ex(mem_ctx, 10, _table, 0, 0, 0, 0,
sbus_opath_hash_delete_cb, conn);
}
static errno_t
sbus_opath_hash_add_iface(hash_table_t *table,
const char *object_path,
struct sbus_interface *iface,
bool *_path_known)
{
TALLOC_CTX *tmp_ctx = NULL;
struct sbus_interface_list *list = NULL;
struct sbus_interface_list *item = NULL;
const char *iface_name = iface->vtable->meta->name;
hash_key_t key;
hash_value_t value;
bool path_known;
errno_t ret;
int hret;
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
return ENOMEM;
}
DEBUG(SSSDBG_TRACE_FUNC, "Registering interface %s with path %s\n",
iface_name, object_path);
/* create new list item */
item = talloc_zero(tmp_ctx, struct sbus_interface_list);
if (item == NULL) {
return ENOMEM;
}
item->interface = iface;
/* first lookup existing list in hash table */
key.type = HASH_KEY_STRING;
key.str = talloc_strdup(tmp_ctx, object_path);
if (key.str == NULL) {
ret = ENOMEM;
goto done;
}
hret = hash_lookup(table, &key, &value);
if (hret == HASH_SUCCESS) {
/* This object path has already some interface registered. We will
* check for existence of the interface currently being added and
* add it if missing. */
path_known = true;
list = talloc_get_type(value.ptr, struct sbus_interface_list);
if (sbus_iface_list_lookup(list, iface_name) != NULL) {
DEBUG(SSSDBG_MINOR_FAILURE, "Trying to register the same interface"
" twice: iface=%s, opath=%s\n", iface_name, object_path);
ret = EEXIST;
goto done;
}
DLIST_ADD_END(list, item, struct sbus_interface_list *);
ret = EOK;
goto done;
} else if (hret != HASH_ERROR_KEY_NOT_FOUND) {
ret = EIO;
goto done;
}
/* otherwise create new hash entry and new list */
path_known = false;
list = item;
value.type = HASH_VALUE_PTR;
value.ptr = list;
hret = hash_enter(table, &key, &value);
if (hret != HASH_SUCCESS) {
ret = EIO;
goto done;
}
talloc_steal(table, key.str);
ret = EOK;
done:
if (ret == EOK) {
talloc_steal(item, iface);
talloc_steal(table, item);
*_path_known = path_known;
}
talloc_free(tmp_ctx);
return ret;
}
static bool
sbus_opath_hash_has_path(hash_table_t *table,
const char *object_path)
{
hash_key_t key;
key.type = HASH_KEY_STRING;
key.str = discard_const(object_path);
return hash_has_key(table, &key);
}
/**
* First @object_path is looked up in @table, if it is not found it steps up
* in the path hierarchy and try to lookup the parent node. This continues
* until the root is reached.
*/
struct sbus_interface *
sbus_opath_hash_lookup_iface(hash_table_t *table,
const char *object_path,
const char *iface_name)
{
TALLOC_CTX *tmp_ctx = NULL;
struct sbus_interface_list *list = NULL;
struct sbus_interface *iface = NULL;
char *lookup_path = NULL;
hash_key_t key;
hash_value_t value;
int hret;
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
return NULL;
}
lookup_path = talloc_strdup(tmp_ctx, object_path);
if (lookup_path == NULL) {
goto done;
}
while (lookup_path != NULL) {
key.type = HASH_KEY_STRING;
key.str = lookup_path;
hret = hash_lookup(table, &key, &value);
if (hret == HASH_SUCCESS) {
list = talloc_get_type(value.ptr, struct sbus_interface_list);
iface = sbus_iface_list_lookup(list, iface_name);
if (iface != NULL) {
goto done;
}
} else if (hret != HASH_ERROR_KEY_NOT_FOUND) {
DEBUG(SSSDBG_OP_FAILURE,
"Unable to search hash table: hret=%d\n", hret);
iface = NULL;
goto done;
}
/* we will not free lookup path since it is freed with tmp_ctx
* and the object paths are supposed to be small */
lookup_path = sbus_opath_parent_subtree(tmp_ctx, lookup_path);
}
done:
talloc_free(tmp_ctx);
return iface;
}
/**
* Acquire list of all interfaces that are supported on given object path.
*/
errno_t
sbus_opath_hash_lookup_supported(TALLOC_CTX *mem_ctx,
hash_table_t *table,
const char *object_path,
struct sbus_interface_list **_list)
{
TALLOC_CTX *tmp_ctx = NULL;
TALLOC_CTX *list_ctx = NULL;
struct sbus_interface_list *copy = NULL;
struct sbus_interface_list *list = NULL;
char *lookup_path = NULL;
hash_key_t key;
hash_value_t value;
errno_t ret;
int hret;
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
return ENOMEM;
}
list_ctx = talloc_new(tmp_ctx);
if (list_ctx == NULL) {
ret = ENOMEM;
goto done;
}
lookup_path = talloc_strdup(tmp_ctx, object_path);
if (lookup_path == NULL) {
ret = ENOMEM;
goto done;
}
while (lookup_path != NULL) {
key.type = HASH_KEY_STRING;
key.str = lookup_path;
hret = hash_lookup(table, &key, &value);
if (hret == HASH_SUCCESS) {
ret = sbus_iface_list_copy(list_ctx, value.ptr, &copy);
if (ret != EOK) {
goto done;
}
DLIST_CONCATENATE(list, copy, struct sbus_interface_list *);
} else if (hret != HASH_ERROR_KEY_NOT_FOUND) {
DEBUG(SSSDBG_OP_FAILURE,
"Unable to search hash table: hret=%d\n", hret);
ret = EIO;
goto done;
}
/* we will not free lookup path since it is freed with tmp_ctx
* and the object paths are supposed to be small */
lookup_path = sbus_opath_parent_subtree(tmp_ctx, lookup_path);
}
talloc_steal(mem_ctx, list_ctx);
*_list = list;
ret = EOK;
done:
talloc_free(tmp_ctx);
return ret;
}
errno_t
sbus_nodes_hash_init(TALLOC_CTX *mem_ctx,
struct sbus_connection *conn,
hash_table_t **_table)
{
return sss_hash_create_ex(mem_ctx, 10, _table, 0, 0, 0, 0,
NULL, conn);
}
struct sbus_nodes_data {
sbus_nodes_fn nodes_fn;
void *handler_data;
};
static errno_t
sbus_nodes_hash_add(hash_table_t *table,
const char *object_path,
sbus_nodes_fn nodes_fn,
void *handler_data)
{
TALLOC_CTX *tmp_ctx;
struct sbus_nodes_data *data;
hash_key_t key;
hash_value_t value;
errno_t ret;
bool has_key;
int hret;
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
return ENOMEM;
}
key.type = HASH_KEY_STRING;
key.str = talloc_strdup(tmp_ctx, object_path);
if (key.str == NULL) {
return ENOMEM;
}
has_key = hash_has_key(table, &key);
if (has_key) {
ret = EEXIST;
goto done;
}
data = talloc_zero(tmp_ctx, struct sbus_nodes_data);
if (data == NULL) {
ret = ENOMEM;
goto done;
}
data->handler_data = handler_data;
data->nodes_fn = nodes_fn;
value.type = HASH_VALUE_PTR;
value.ptr = data;
hret = hash_enter(table, &key, &value);
if (hret != HASH_SUCCESS) {
ret = EIO;
goto done;
}
talloc_steal(table, key.str);
talloc_steal(table, data);
ret = EOK;
done:
talloc_free(tmp_ctx);
return ret;
}
const char **
sbus_nodes_hash_lookup(TALLOC_CTX *mem_ctx,
hash_table_t *table,
const char *object_path)
{
struct sbus_nodes_data *data;
hash_key_t key;
hash_value_t value;
int hret;
key.type = HASH_KEY_STRING;
key.str = discard_const(object_path);
hret = hash_lookup(table, &key, &value);
if (hret == HASH_ERROR_KEY_NOT_FOUND) {
return NULL;
} else if (hret != HASH_SUCCESS) {
DEBUG(SSSDBG_OP_FAILURE,
"Unable to search hash table: hret=%d\n", hret);
return NULL;
}
data = talloc_get_type(value.ptr, struct sbus_nodes_data);
return data->nodes_fn(mem_ctx, object_path, data->handler_data);
}
static struct sbus_interface *
sbus_new_interface(TALLOC_CTX *mem_ctx,
const char *object_path,
struct sbus_vtable *iface_vtable,
void *handler_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->handler_data = handler_data;
return intf;
}
static DBusHandlerResult
sbus_message_handler(DBusConnection *dbus_conn,
DBusMessage *message,
void *user_data);
static errno_t
sbus_conn_register_path(struct sbus_connection *conn,
const char *path)
{
static DBusObjectPathVTable vtable = {NULL, sbus_message_handler,
NULL, NULL, NULL, NULL};
DBusError error;
char *reg_path = NULL;
dbus_bool_t dbret;
DEBUG(SSSDBG_TRACE_FUNC, "Registering object path %s with D-Bus "
"connection\n", path);
if (sbus_opath_is_subtree(path)) {
reg_path = sbus_opath_get_base_path(conn, path);
if (reg_path == NULL) {
return ENOMEM;
}
/* D-Bus does not allow to have both object path and fallback
* registered. Since we handle the real message handlers ourselves
* we will register fallback only in this case. */
if (sbus_opath_hash_has_path(conn->managed_paths, reg_path)) {
dbus_connection_unregister_object_path(conn->dbus.conn, reg_path);
}
dbret = dbus_connection_register_fallback(conn->dbus.conn, reg_path,
&vtable, conn);
talloc_free(reg_path);
} else {
dbus_error_init(&error);
dbret = dbus_connection_try_register_object_path(conn->dbus.conn, path,
&vtable, conn, &error);
if (dbus_error_is_set(&error) &&
strcmp(error.name, DBUS_ERROR_OBJECT_PATH_IN_USE) == 0) {
/* A fallback is probably already registered. Just return. */
dbus_error_free(&error);
return EOK;
}
}
if (!dbret) {
DEBUG(SSSDBG_FATAL_FAILURE, "Unable to register object path "
"%s with D-Bus connection.\n", path);
return ENOMEM;
}
return EOK;
}
errno_t
sbus_conn_register_iface(struct sbus_connection *conn,
struct sbus_vtable *iface_vtable,
const char *object_path,
void *handler_data)
{
struct sbus_interface *iface = NULL;
bool path_known;
errno_t ret;
if (conn == NULL || iface_vtable == NULL || object_path == NULL) {
return EINVAL;
}
iface = sbus_new_interface(conn, object_path, iface_vtable, handler_data);
if (iface == NULL) {
return ENOMEM;
}
ret = sbus_opath_hash_add_iface(conn->managed_paths, object_path, iface,
&path_known);
if (ret != EOK) {
talloc_free(iface);
return ret;
}
if (path_known) {
/* this object path is already registered */
return EOK;
}
/* if ret != EOK we will still leave iface in the table, since
* we probably don't have enough memory to remove it correctly anyway */
ret = sbus_conn_register_path(conn, object_path);
if (ret != EOK) {
return ret;
}
/* register standard interfaces with this object path as well */
ret = sbus_conn_register_iface(conn, sbus_properties_vtable(),
object_path, conn);
if (ret != EOK) {
return ret;
}
ret = sbus_conn_register_iface(conn, sbus_introspect_vtable(),
object_path, conn);
if (ret != EOK) {
return ret;
}
return ret;
}
errno_t
sbus_conn_register_iface_map(struct sbus_connection *conn,
struct sbus_iface_map *map,
void *pvt)
{
errno_t ret;
int i;
for (i = 0; map[i].path != NULL; i++) {
ret = sbus_conn_register_iface(conn, map[i].vtable, map[i].path, pvt);
if (ret != EOK) {
return ret;
}
}
return EOK;
}
void
sbus_conn_register_nodes(struct sbus_connection *conn,
const char *path,
sbus_nodes_fn nodes_fn,
void *data)
{
errno_t ret;
ret = sbus_nodes_hash_add(conn->nodes_fns, path, nodes_fn, data);
if (ret != EOK && ret != EEXIST) {
DEBUG(SSSDBG_MINOR_FAILURE, "Unable to register node function with "
"%s. Introspection may not work correctly.\n", path);
}
}
errno_t
sbus_conn_reregister_paths(struct sbus_connection *conn)
{
hash_key_t *keys = NULL;
unsigned long count;
unsigned long i;
errno_t ret;
int hret;
hret = hash_keys(conn->managed_paths, &count, &keys);
if (hret != HASH_SUCCESS) {
ret = ENOMEM;
goto done;
}
for (i = 0; i < count; i++) {
ret = sbus_conn_register_path(conn, keys[i].str);
if (ret != EOK) {
goto done;
}
}
ret = EOK;
done:
talloc_free(keys);
return ret;
}
static void
sbus_message_handler_got_caller_id(struct tevent_req *req);
static DBusHandlerResult
sbus_message_handler(DBusConnection *dbus_conn,
DBusMessage *message,
void *handler_data)
{
struct tevent_req *req;
struct sbus_connection *conn;
struct sbus_interface *iface;
struct sbus_request *sbus_req;
const struct sbus_method_meta *method;
const char *iface_name;
const char *method_name;
const char *path;
const char *sender;
conn = talloc_get_type(handler_data, struct sbus_connection);
/* header information */
iface_name = dbus_message_get_interface(message);
method_name = dbus_message_get_member(message);
path = dbus_message_get_path(message);
sender = dbus_message_get_sender(message);
DEBUG(SSSDBG_TRACE_INTERNAL, "Received SBUS method %s.%s on path %s\n",
iface_name, method_name, path);
/* try to find the interface */
iface = sbus_opath_hash_lookup_iface(conn->managed_paths,
path, iface_name);
if (iface == NULL) {
goto fail;
}
method = sbus_meta_find_method(iface->vtable->meta, method_name);
if (method == NULL || method->vtable_offset == 0) {
goto fail;
}
/* we have a valid handler, create D-Bus request */
sbus_req = sbus_new_request(conn, iface, message);
if (sbus_req == NULL) {
return DBUS_HANDLER_RESULT_NEED_MEMORY;
}
sbus_req->method = method;
/* now get the sender ID */
req = sbus_get_sender_id_send(sbus_req, conn->ev, conn, sender);
if (req == NULL) {
talloc_free(sbus_req);
return DBUS_HANDLER_RESULT_NEED_MEMORY;
}
tevent_req_set_callback(req, sbus_message_handler_got_caller_id, sbus_req);
return DBUS_HANDLER_RESULT_HANDLED;
fail: ;
DBusMessage *reply;
DEBUG(SSSDBG_CRIT_FAILURE, "No matching handler found for method %s.%s "
"on path %s\n", iface_name, method_name, path);
reply = dbus_message_new_error(message, DBUS_ERROR_UNKNOWN_METHOD, NULL);
sbus_conn_send_reply(conn, reply);
return DBUS_HANDLER_RESULT_HANDLED;
}
static void
sbus_message_handler_got_caller_id(struct tevent_req *req)
{
struct sbus_request *sbus_req;
const struct sbus_method_meta *method;
sbus_msg_handler_fn handler;
sbus_method_invoker_fn invoker;
void *pvt;
DBusError *error;
errno_t ret;
sbus_req = tevent_req_callback_data(req, struct sbus_request);
method = sbus_req->method;
ret = sbus_get_sender_id_recv(req, &sbus_req->client);
if (ret != EOK) {
error = sbus_error_new(sbus_req, DBUS_ERROR_FAILED, "Failed to "
"resolve caller's ID: %s\n", sss_strerror(ret));
sbus_request_fail_and_finish(sbus_req, error);
return;
}
handler = VTABLE_FUNC(sbus_req->intf->vtable, method->vtable_offset);
invoker = method->invoker;
pvt = sbus_req->intf->handler_data;
sbus_request_invoke_or_finish(sbus_req, handler, pvt, invoker);
return;
}