int main(int argc, char** argv)
{
mpi::environment env(argc, argv);
mpi::communicator world;
// half of the processes generate, the others accumulate
// the sample size is just the number of accumulation ranks
if (world.rank() < world.size()/2)
calculate_samples(world.size()-world.size()/2);
else
accumulate_samples();
return 0;
}
int main (int argc, char **argv)
{
int server_fd, fifo_fd, res, i, nelems;
char buf[LINE_MAX], packet[PACKET_SIZE];
entropy_src[0].id = 0;
entropy_src[0].path = "/dev/random";
entropy_src[0].estimate = 0.4;
entropy_src[0].len = 100;
entropy_src[0].id = 1;
entropy_src[0].path = "/dev/urandom";
entropy_src[0].estimate = 0.5;
entropy_src[0].len = 120;
entropy_src[0].id = 2;
entropy_src[0].path = NULL;
entropy_src[0].estimate = 0.8;
entropy_src[0].len = 120;
mkfifo(FIFO_PATH, 0777);
fifo_fd = open(FIFO_PATH, O_NONBLOCK);
if (fifo_fd == -1)
printf("open returned %d: %s\n",
fifo_fd, strerror(fifo_fd));
nsources = 2; // this value will be taken from entropy_pool.nsources
// create children for accumulate entropy from i source
// All information about source will be obtained from config file.
for (i = 0; i < nsources; i++) {
if ((pid = fork()) < 0) {
printf("Fork returned %d: %s\n",
pid, strerror(pid));
exit(1);
} else if (pid == 0) {
accumulate_samples(i);
}
server_fd = sock_unix_listen("/var/run/yarrow.socket");
if (server_fd <= 0) {
perror("Sock unix listen");
exit(1);
}
printf("server_fd %d\n", server_fd);
sock_nonblock(server_fd);
poll_fd = calloc(2, sizeof(struct pollfd));
if (poll_fd == NULL) {
perror("Calloc returned NULL.");
exit(1);
}
poll_fd[0].fd = server_fd;
poll_fd[0].events = POLLIN;
poll_fd[1].fd = fifo_fd;
poll_fd[1].events = (POLLIN|POLLPRI);
peer_ctx = calloc(2, sizeof(struct peer));
if (peer_ctx == NULL) {
perror("Calloc returned NULL");
exit(1);
}
peer_ctx[0].sfd = server_fd;
peer_ctx[0].bufused = 0;
peer_ctx[1].sfd = fifo_fd;
peer_ctx[1].bufused = 0;
nelems = 2;
i = 0;
while (1) {
res = poll(poll_fd, nelems, -1);
if (res > 0) {
if (poll_fd[0].revents & POLLIN) {
accept_connect(&nelems);
} else if (poll_fd[1].revents & POLLIN) {
accumulate_entropy(packet);
}
process_events(nelems);
} else if (res < 0 && errno != EINTR) {
printf("poll returned %d: %s\n",
res, strerror(errno));
break;
}
}
close(server_fd);
unlink("/var/run/yarrow.socket");
return 0;
}
