kern_return_t
host_create_mach_voucher_trap(struct host_create_mach_voucher_args *args)
{
host_t host = port_name_to_host(args->host);
ipc_voucher_t new_voucher = IV_NULL;
ipc_port_t voucher_port = IPC_PORT_NULL;
mach_port_name_t voucher_name = 0;
kern_return_t kr = 0;
if (host == HOST_NULL)
return MACH_SEND_INVALID_DEST;
if (args->recipes_size < 0)
return KERN_INVALID_ARGUMENT;
else if (args->recipes_size > MACH_VOUCHER_ATTR_MAX_RAW_RECIPE_ARRAY_SIZE)
return MIG_ARRAY_TOO_LARGE;
if (args->recipes_size < MACH_VOUCHER_TRAP_STACK_LIMIT) {
/* keep small recipes on the stack for speed */
uint8_t krecipes[args->recipes_size];
if (copyin(args->recipes, (void *)krecipes, args->recipes_size)) {
kr = KERN_MEMORY_ERROR;
goto done;
}
kr = host_create_mach_voucher(host, krecipes, args->recipes_size, &new_voucher);
} else {
uint8_t *krecipes = kalloc((vm_size_t)args->recipes_size);
if (!krecipes) {
kr = KERN_RESOURCE_SHORTAGE;
goto done;
}
if (copyin(args->recipes, (void *)krecipes, args->recipes_size)) {
kfree(krecipes, (vm_size_t)args->recipes_size);
kr = KERN_MEMORY_ERROR;
goto done;
}
kr = host_create_mach_voucher(host, krecipes, args->recipes_size, &new_voucher);
kfree(krecipes, (vm_size_t)args->recipes_size);
}
if (kr == 0) {
voucher_port = convert_voucher_to_port(new_voucher);
voucher_name = ipc_port_copyout_send(voucher_port, current_space());
kr = copyout(&voucher_name, args->voucher, sizeof(voucher_name));
}
done:
return kr;
}
static inline kern_return_t
_voucher_create_mach_voucher(const mach_voucher_attr_recipe_data_t *recipes,
size_t recipes_size, mach_voucher_t *kvp)
{
kern_return_t kr;
mach_port_t mhp = _dispatch_get_mach_host_port();
mach_voucher_t kv = MACH_VOUCHER_NULL;
mach_voucher_attr_raw_recipe_array_t kvr;
mach_voucher_attr_recipe_size_t kvr_size;
kvr = (mach_voucher_attr_raw_recipe_array_t)recipes;
kvr_size = (mach_voucher_attr_recipe_size_t)recipes_size;
kr = host_create_mach_voucher(mhp, kvr, kvr_size, &kv);
DISPATCH_VERIFY_MIG(kr);
if (!kr) {
_dispatch_kvoucher_debug("create", kv);
_dispatch_voucher_debug_machport(kv);
}
*kvp = kv;
return kr;
}
