bool
OrderedTask::CalcEffectiveMC(const AircraftState &aircraft,
const GlidePolar &glide_polar,
fixed &val) const
{
if (AllowIncrementalBoundaryStats(aircraft)) {
TaskEffectiveMacCready bce(task_points, active_task_point, aircraft,
task_behaviour.glide, glide_polar);
val = bce.search(glide_polar.GetMC());
return true;
} else {
val = glide_polar.GetMC();
return false;
}
}
bool
OrderedTask::CalcCruiseEfficiency(const AircraftState &aircraft,
const GlidePolar &glide_polar,
fixed &val) const
{
if (AllowIncrementalBoundaryStats(aircraft)) {
TaskCruiseEfficiency bce(task_points, active_task_point, aircraft,
task_behaviour.glide, glide_polar);
val = bce.search(fixed_one);
return true;
} else {
val = fixed_one;
return false;
}
}
/* returns -1 for stalemate or winner's color */
int playchess()
{
int use_pondering = 0;
printboard_and_time();
for (;;)
{
long starttime, endtime;
move m;
int g;
g = gameoverp(tomove());
if (g)
{
switch (g)
{
case END_CHECKMATE:
if (tomove() == BLACK)
{
return end(WHITE, "white mates");
}
else
{
return end(BLACK, "black mates");
}
case END_STALEMATE:
return end(-1, "stalemate");
case NON_MATERIAL:
return end(-1, "insufficient material");
case REP_DRAW:
if (!robo_mode)
{
printf("drawable position\n");
}
if (computer[WHITE]||computer[BLACK])
{
if (robo_mode)
tellics("draw\n");
return end(-1, "draw by repetition of moves");
}
break;
}
}
starttime = get_ms();
if (computer[tomove()])
{
m = bce();
if ((m!=dummymove)&&(validmove(m)==1))
{
printf("move %s\n", movestring(m));
}
else
{
if (robo_mode)
{
tellics("mailmoves\n");
tellics(
"message madhacker valid? = %d, move = %s, wouldbeincheckp() = %d, wouldbeinfullcheckp() = %d, pv = %s\n",
validmove(m),
movestring(m),
wouldbeincheckp(m),
wouldbeincheckfullp(m),
thoughts);
tellics("abort\n");
}
else
{
printf("BCE returned invalid move: %s\n", movestring(m));
printf("valid? = %d\n", validmove(m));
fprintf(stdout, "random seed = %ld\n", seed);
fprintf(stdout, "hash = %lld\n", board->hash);
fprintf(stdout, "draw? = %d g = %d\n",
draw_by_rep(), g);
computer[1] = computer[0] = 0;
}
}
use_pondering = 1;
}
else
{
if ((ponder_mode && computer[opp(tomove())])&&
use_pondering)
{
ponder();
use_pondering = 0;
}
m = usermove();
use_pondering = 0;
}
endtime = get_ms();
chessclock[tomove()] -= (endtime-starttime);
chessclock[tomove()] += clockinc;
if (m)
{
domove(m);
update_state(m);
printboard_and_time();
}
}
}
void cmd_suggest(char *s){printf("Hint: %s\n", movestring(bce()));}
int main(int argc, char *argv[])
{
int dev_random_fd = open(DEV_RANDOM, O_RDWR);
const int max_bits_in_kernel_rng = kernel_rng_get_max_entropy_count();
const int write_threshold = kernel_rng_get_write_threshold();
int c;
bool do_not_fork = false, log_console = false, log_syslog = false;
char *log_logfile = NULL;
std::string username, password;
int interval = -1;
std::vector<std::string> hosts;
int log_level = LOG_INFO;
printf("eb_client_linux_kernel v" VERSION ", (C) 2009-2017 by [email protected]\n");
while((c = getopt(argc, argv, "b:hX:P:I:L:l:sn")) != -1)
{
switch(c)
{
case 'b':
interval = atof(optarg);
if (interval < 1)
error_exit("Interval must be > 0");
break;
case 'X':
get_auth_from_file(optarg, username, password);
break;
case 'P':
pid_file = optarg;
break;
case 'I':
hosts.push_back(optarg);
break;
case 's':
log_syslog = true;
break;
case 'L':
log_level = atoi(optarg);
break;
case 'l':
log_logfile = optarg;
break;
case 'n':
do_not_fork = true;
log_console = true;
break;
default:
help();
return 1;
}
}
if (username.length() == 0 || password.length() == 0)
error_exit("please select a file with authentication parameters (username + password) using the -X switch");
if (hosts.empty())
error_exit("no host to connect to selected");
set_logging_parameters(log_console, log_logfile, log_syslog, log_level);
if (!do_not_fork)
{
if (daemon(0, 0) == -1)
error_exit("fork failed");
}
protocol *p = new protocol(&hosts, username, password, false, client_type, DEFAULT_COMM_TO);
(void)umask(0177);
no_core();
write_pid(pid_file);
signal(SIGPIPE, SIG_IGN);
signal(SIGTERM, sig_handler);
signal(SIGINT , sig_handler);
signal(SIGQUIT, sig_handler);
dolog(LOG_INFO, "started with %d bits in kernel rng", kernel_rng_get_entropy_count());
if (dev_random_fd == -1)
error_exit("failed to open %s", DEV_RANDOM);
bit_count_estimator bce(BCE_SHANNON);
for(;!do_exit;)
{
struct timeval tv, *ptv = NULL;
if (interval > 0) {
tv.tv_sec = interval / 1000;
tv.tv_usec = int(interval * 1000) % 1000;
ptv = &tv;
}
// wait for /dev/random te become writable which means the entropy-
// level dropped below a certain threshold
fd_set write_fd;
FD_ZERO(&write_fd);
FD_SET(dev_random_fd, &write_fd);
dolog(LOG_DEBUG, "wait for low-event");
for(;!do_exit;)
{
int rc = select(dev_random_fd + 1, NULL, &write_fd, NULL, ptv);
printf("%d\n", rc);
if (rc >= 0)
break;
if (errno != EINTR && errno != EAGAIN)
error_exit("Select error: %m");
}
if (do_exit)
break;
int n_bits_in_kernel_rng = kernel_rng_get_entropy_count();
dolog(LOG_DEBUG, "kernel rng bit count: %d", n_bits_in_kernel_rng);
if (n_bits_in_kernel_rng < write_threshold)
{
/* find out how many bits to add */
int n_bits_to_get = max_bits_in_kernel_rng - n_bits_in_kernel_rng;
if (n_bits_to_get <= 0)
{
dolog(LOG_DEBUG, "number of bits to get <= 0: %d", n_bits_to_get);
continue;
}
if (n_bits_to_get > 9999)
n_bits_to_get = 9999;
if (n_bits_to_get < 8)
n_bits_to_get = 8;
dolog(LOG_INFO, "%d bits left (%d max), will get %d bits", n_bits_in_kernel_rng, max_bits_in_kernel_rng, n_bits_to_get);
int n_bytes_to_get = (n_bits_to_get + 7) / 8;
unsigned char *buffer = static_cast<unsigned char *>(malloc(n_bytes_to_get));
if (!buffer)
error_exit("out of memory allocating %d bytes", n_bytes_to_get);
lock_mem(buffer, n_bytes_to_get);
int n_bytes = p -> request_bytes(buffer, n_bits_to_get, false, &do_exit);
if (do_exit)
break;
int is_n_bits = bce.get_bit_count(reinterpret_cast<unsigned char *>(buffer), n_bytes);
int rc = kernel_rng_add_entropy(reinterpret_cast<unsigned char *>(buffer), n_bytes, is_n_bits);
if (rc == -1)
error_exit("error submiting entropy data to kernel");
dolog(LOG_DEBUG, "new entropy count: %d", kernel_rng_get_entropy_count());
memset(buffer, 0x00, n_bytes_to_get);
unlock_mem(buffer, n_bytes_to_get);
free(buffer);
}
}
unlink(pid_file);
delete p;
return 0;
}
