inline int hash_move(hash_table_t *table_src, hash_table_t *table_dst,
void *data, ds_cmpfunc_t cmp, void *val)
{
unsigned int isrc = table_src->hashfunc(table_src->size, data);
unsigned int idst = table_dst->hashfunc(table_dst->size, data);
return dlist_move(&table_src->table[isrc], &table_dst->table[idst],
cmp, val);
}
/* THE MAIN */
int main (const int argc, const char * argv[]) {
/* Socket data */
soc_token soc = init_soc;
soc_host lan;
soc_port port;
int soc_fd, fd;
/* Socket message */
msg_type msg;
/* Times and timeouts */
timeout_t start_time, end_time, current_time;
timeout_t wait_timeout;
double local_time, remote_time;
/* Dynamic list of server infos */
dlist list;
info_type info;
/* Utilities */
boolean for_read;
char buff[256];
int res;
char *index;
/*********/
/* Start */
/*********/
/* Save prog name */
strcpy (prog, argv[0]);
strcpy (prog, basename (prog));
/*******************/
/* Parse arguments */
/*******************/
/* Check args */
if (argc != 2) {
error ("Invalid argument");
}
/* Parse IPM address and port */
strcpy (buff, argv[1]);
index = strstr (buff, ":");
if (index == NULL) {
error ("Invalid argument");
}
*index = '\0';
index++;
if (soc_str2host (buff, &lan) != SOC_OK) {
sprintf (buff, "Invalid ipm address %s", buff);
error (buff);
}
if (soc_str2port (index, &port) != SOC_OK) {
sprintf (buff, "Invalid port num %s", index);
error (buff);
}
/**************/
/* Initialize */
/**************/
/* Init dynamic list */
dlist_init (& list, sizeof(info_type));
/* Init socket */
if (soc_open (&soc, udp_socket) != SOC_OK) {
perror ("opening socket");
error ("Socket initialization failed");
}
if (soc_set_dest_host_port (soc, &lan, port) != SOC_OK) {
perror ("setting destination");
error ("Socket initialization failed");
}
if (soc_link_port (soc, port) != SOC_OK) {
perror ("linking to port");
error ("Socket initialization failed");
}
if (soc_get_dest_host (soc, &lan) != SOC_OK) {
perror ("getting dest lan");
error ("Socket initialization failed");
}
if (soc_get_dest_port (soc, &port) != SOC_OK) {
perror ("getting dest port");
error ("Socket initialization failed");
}
/* Add socket to waiting point */
if (soc_get_id(soc, &soc_fd) != SOC_OK) {
perror ("getting socket id");
error ("Socket initialization failed");
}
if (evt_add_fd(soc_fd, TRUE) != WAIT_OK) {
perror("Adding fd");
error ("Socket initialization failed");
}
/* Activate signal catching */
activate_signal_handling();
/* Report starting */
buff[0]='\0';
addr_image (&lan, buff);
printf ("%s mcasting at address %s on port %d.\n", prog, buff, (int) port);
/* Init times */
get_time (&start_time);
current_time = start_time;
end_time = start_time;
incr_time (&end_time, DELAY_CLIENT_MS);
/* Send initial ping request */
msg.ping = TRUE;
msg.time = start_time;
if (soc_send (soc, (soc_message) &msg, sizeof(msg)) != SOC_OK) {
perror ("sending ping");
error ("Sending ping request failed");
}
/*************/
/* Main loop */
/*************/
for (;;) {
/* First step is to loop until timeout */
if (wait_timeout.tv_sec != -1) {
wait_timeout = end_time;
res = sub_time (&wait_timeout, ¤t_time);
if (res <= 0) {
break;
}
}
if (evt_wait (&fd, &for_read, &wait_timeout) != WAIT_OK) {
perror ("waiting for event");
error ("Waiting for events failed");
}
if (! for_read) {
error ("Write event received");
}
/* Termination signal */
if (fd == SIG_EVENT) {
if (get_signal () == SIG_TERMINATE) {
break;
}
} else if (fd == NO_EVENT) {
/* Timeout: first step ends with a dump of servers */
if (dlist_length(&list) != 0) {
dlist_rewind (&list, TRUE);
for (;;) {
dlist_read (&list, &info);
/* Get host name if possible, else dump address */
res = soc_host_name_of (&info.host, buff, sizeof(buff));
if (res != SOC_OK) {
buff[0]='\0';
addr_image (&info.host, buff);
}
/* Compute (Start_time + Reception_time) / 2 */
local_time = (time_to_double (&start_time)
+ time_to_double (&info.reception_time) ) / 2.0;
remote_time = time_to_double (&info.server_time);
printf ("Host %s is shifted by %4.03fs\n", buff, remote_time - local_time);
/* Done when last record has been put */
if (dlist_get_pos (&list, FALSE) == 1) {
break;
}
dlist_move (&list, TRUE);
}
}
/* Now entering second step: infinite timeout */
wait_timeout.tv_sec = -1;
wait_timeout.tv_usec = -1;
printf ("%s ready.\n", prog);
} else if (fd != soc_fd) {
sprintf (buff, "Invalid fd %d received", fd);
error (buff);
} else {
/* Now this is the socket, read message */
res = soc_receive (soc, (soc_message) &msg, sizeof(msg), TRUE);
if (res < 0) {
perror ("reading from socket");
error ("Reading message failed");
} else if (res != sizeof(msg)) {
sprintf (buff, "Invalid size received, expected %d, got %d",
(int)sizeof(msg), res);
error (buff);
}
get_time (¤t_time);
/* Client and server different behaviours */
if ((wait_timeout.tv_sec != -1) && !msg.ping) {
/* First step: store the address and time of server, if pong */
if (soc_get_dest_host (soc, &(info.host)) != SOC_OK) {
perror ("getting dest host");
error ("Getting server address failed");
}
info.server_time = msg.time;
info.reception_time = current_time;
dlist_insert (&list, &info, TRUE);
} else if ( (wait_timeout.tv_sec == -1) && msg.ping) {
/* Second step: reply pong and time to ping */
msg.time = current_time;
msg.ping = FALSE;
if (soc_send (soc, (soc_message) &msg, sizeof(msg)) != SOC_OK) {
perror ("sending pong");
error ("Sending pong request failed");
}
}
}
} /* End of main loop */
/* Clean - Close */
dlist_delete_all (&list);
(void) evt_del_fd (soc_fd, TRUE);
(void) soc_close (&soc);
printf ("Done.\n");
exit (0);
}
int main (void) {
dlist list;
int i, v;
dlist_init (&list, sizeof(int));
printf ("Add 10 elements\n");
for (i = 1; i <= 10; i++) {
dlist_insert (&list, &i, TRUE);
}
printf ("Reads 5 elements from the last one:");
dlist_rewind (&list, FALSE);
for (i = 1; i <= 5; i++) {
dlist_read (&list, &v);
printf (" %02d", v);
dlist_move (&list, FALSE);
}
printf ("\n");
printf ("List length: %02d\n", dlist_length (&list));
printf ("Deletes the current\n");
dlist_delete (&list, TRUE);
printf ("Pos from first: %02d List length: %02d\n",
dlist_get_pos (&list, TRUE), dlist_length (&list));
printf ("Reads 7 elements from the first one:");
dlist_rewind (&list, TRUE);
for (i = 1; i <= 7; i++) {
dlist_read (&list, &v);
printf (" %02d", v);
dlist_move (&list, TRUE);
}
printf ("\n");
printf ("Adds the element 50 before current position and read: ");
v = 50;
dlist_insert (&list, &v, FALSE);
dlist_read (&list, &v);
printf ("%02d\n", v);
printf ("List length: %02d\n", dlist_length (&list));
printf ("Reads all elements from the first one:");
dlist_rewind (&list, TRUE);
for (;;) {
dlist_read (&list, &v);
printf (" %02d", v);
if (dlist_get_pos (&list, FALSE) == 1) break;
dlist_move (&list, TRUE);
}
printf ("\n");
printf ("Sort: ");
dlist_sort (&list, less_than);
for (;;) {
dlist_read (&list, &v);
printf (" %02d", v);
if (dlist_get_pos (&list, FALSE) == 1) break;
dlist_move (&list, TRUE);
}
printf ("\n");
printf ("Delete all\n");
dlist_delete_all (&list);
printf ("List length: %02d\n", dlist_length (&list));
exit (0);
}
