uint32_t
_notify_lib_resume(notify_state_t *ns, pid_t pid, int token)
{
client_t *c;
uint64_t cid;
uint32_t status = NOTIFY_STATUS_OK;
if (ns == NULL) return NOTIFY_STATUS_FAILED;
cid = make_client_id(pid, token);
if (ns->lock != NULL) pthread_mutex_lock(ns->lock);
c = _nc_table_find_64(ns->client_table, cid);
if (c != NULL)
{
if (c->suspend_count > 0) c->suspend_count--;
if (c->suspend_count == 0)
{
c->state &= ~NOTIFY_CLIENT_STATE_SUSPENDED;
c->state &= ~NOTIFY_CLIENT_STATE_TIMEOUT;
if (c->state & NOTIFY_CLIENT_STATE_PENDING)
{
status = _internal_send(ns, c);
}
}
}
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return status;
}
/*
* Set state value for a name.
*/
uint32_t
_notify_lib_set_state(notify_state_t *ns, uint64_t nid, uint64_t state, uid_t uid, gid_t gid)
{
name_info_t *n;
int auth;
if (ns == NULL) return NOTIFY_STATUS_FAILED;
if (ns->lock != NULL) pthread_mutex_lock(ns->lock);
n = (name_info_t *)_nc_table_find_64(ns->name_id_table, nid);
if (n == NULL)
{
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NOTIFY_STATUS_INVALID_NAME;
}
auth = _internal_check_access(ns, n->name, uid, gid, NOTIFY_ACCESS_WRITE);
if (auth != 0)
{
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NOTIFY_STATUS_NOT_AUTHORIZED;
}
n->state = state;
n->state_time = mach_absolute_time();
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NOTIFY_STATUS_OK;
}
/*
* Get state value for a name.
*/
uint32_t
_notify_lib_get_state(notify_state_t *ns, uint64_t nid, uint64_t *state, uid_t uid, gid_t gid)
{
name_info_t *n;
if (ns == NULL) return NOTIFY_STATUS_FAILED;
if (state == NULL) return NOTIFY_STATUS_FAILED;
*state = 0;
if (ns->lock != NULL) pthread_mutex_lock(ns->lock);
n = (name_info_t *)_nc_table_find_64(ns->name_id_table, nid);
if (n == NULL)
{
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NOTIFY_STATUS_INVALID_NAME;
}
#ifdef GET_STATE_AUTH_CHECK
int auth = _internal_check_access(ns, n->name, uid, gid, NOTIFY_ACCESS_READ);
if (auth != 0)
{
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NOTIFY_STATUS_NOT_AUTHORIZED;
}
#endif
*state = n->state;
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NOTIFY_STATUS_OK;
}
int *
_notify_lib_check_addr(notify_state_t *ns, pid_t pid, int token)
{
client_t *c;
int *addr;
uint64_t cid;
if (ns == NULL) return NULL;
cid = make_client_id(pid, token);
if (ns->lock != NULL) pthread_mutex_lock(ns->lock);
c = _nc_table_find_64(ns->client_table, cid);
if (c == NULL)
{
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NULL;
}
if (c->name_info == NULL)
{
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NULL;
}
addr = (int *)&(c->name_info->val);
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return addr;
}
/*
* SPI: get value for a name.
*/
uint32_t
_notify_lib_peek(notify_state_t *ns, pid_t pid, int token, int *val)
{
client_t *c;
uint64_t cid;
if (ns == NULL) return NOTIFY_STATUS_FAILED;
if (val == NULL) return NOTIFY_STATUS_FAILED;
cid = make_client_id(pid, token);
if (ns->lock != NULL) pthread_mutex_lock(ns->lock);
c = _nc_table_find_64(ns->client_table, cid);
if (c == NULL)
{
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NOTIFY_STATUS_INVALID_TOKEN;
}
if (c->name_info == NULL)
{
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NOTIFY_STATUS_INVALID_TOKEN;
}
*val = c->name_info->val;
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NOTIFY_STATUS_OK;
}
void
_notify_lib_suspend(notify_state_t *ns, pid_t pid, int token)
{
client_t *c;
uint64_t cid;
if (ns == NULL) return;
cid = make_client_id(pid, token);
if (ns->lock != NULL) pthread_mutex_lock(ns->lock);
c = _nc_table_find_64(ns->client_table, cid);
if (c != NULL)
{
c->state |= NOTIFY_CLIENT_STATE_SUSPENDED;
if (c->suspend_count < UINT32_MAX) c->suspend_count++;
}
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
}
/*
* Cancel (delete) a client
*/
static void
_internal_cancel(notify_state_t *ns, uint64_t cid)
{
client_t *c;
name_info_t *n;
if (ns == NULL) return;
c = NULL;
n = NULL;
c = _nc_table_find_64(ns->client_table, cid);
if (c == NULL) return;
n = c->name_info;
if (n == NULL) return;
_nc_table_delete_64(n->subscription_table, cid);
_internal_client_release(ns, c);
_internal_release_name_info(ns, n);
}
uint32_t
_notify_lib_post_nid(notify_state_t *ns, uint64_t nid, uid_t uid, gid_t gid)
{
name_info_t *n;
uint32_t status;
if (ns == NULL) return NOTIFY_STATUS_FAILED;
if (ns->lock != NULL) pthread_mutex_lock(ns->lock);
n = (name_info_t *)_nc_table_find_64(ns->name_id_table, nid);
if (n == NULL)
{
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NOTIFY_STATUS_INVALID_NAME;
}
status = _internal_post_name(ns, n, uid, gid);
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return status;
}
/*
* Set value for a name.
*/
uint32_t
_notify_lib_set_val(notify_state_t *ns, pid_t pid, int token, int val, uid_t uid, gid_t gid)
{
client_t *c;
int auth;
uint64_t cid;
if (ns == NULL) return NOTIFY_STATUS_FAILED;
cid = make_client_id(pid, token);
if (ns->lock != NULL) pthread_mutex_lock(ns->lock);
c = _nc_table_find_64(ns->client_table, cid);
if (c == NULL)
{
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NOTIFY_STATUS_INVALID_TOKEN;
}
if (c->name_info == NULL)
{
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NOTIFY_STATUS_INVALID_TOKEN;
}
auth = _internal_check_access(ns, c->name_info->name, uid, gid, NOTIFY_ACCESS_WRITE);
if (auth != 0)
{
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NOTIFY_STATUS_NOT_AUTHORIZED;
}
c->name_info->val = val;
if (ns->lock != NULL) pthread_mutex_unlock(ns->lock);
return NOTIFY_STATUS_OK;
}
static client_t *
_internal_client_new(notify_state_t *ns, pid_t pid, int token)
{
client_t *c;
uint64_t cid = make_client_id(pid, token);
if (ns == NULL) return NULL;
/* detect duplicates - should never happen, but it would be bad */
c = _nc_table_find_64(ns->client_table, cid);
if (c != NULL) return NULL;
c = calloc(1, sizeof(client_t));
if (c == NULL) return NULL;
c->client_id = cid;
c->pid = pid;
c->send_val = token;
_nc_table_insert_64(ns->client_table, cid, c);
return c;
}
void *
_nc_table_find_n(table_t *tin, uint32_t key)
{
uint64_t n64 = key;
return _nc_table_find_64(tin, n64);
}
