char *locator_query(char *hostname, enum locator_servicetype_t svctype, char **extras)
{
static char *buf = NULL;
static int bufsz = 0;
int res, bufneeded;
bufneeded = strlen(hostname) + 100;
if (extras) bufneeded += 1024;
if (!buf) {
bufsz = bufneeded;
buf = (char *)malloc(bufsz);
}
else if (bufneeded > bufsz) {
bufsz = bufneeded;
buf = (char *)realloc(buf, bufsz);
}
if (havecache[svctype] && !extras) {
char *cachedata = locator_querycache(svctype, hostname);
if (cachedata) return cachedata;
}
sprintf(buf, "Q|%s|%s", servicetype_names[svctype], hostname);
if (extras) buf[0] = 'X';
res = call_locator(buf, bufsz);
if (res == -1) return NULL;
switch (*buf) {
case '!': /* This host is fixed on an available server */
case '*': /* Roaming host */
if (extras) {
*extras = strchr(buf+2, '|');
if (**extras == '|') {
**extras = '\0';
(*extras)++;
}
}
if (havecache[svctype] && !extras) locator_updatecache(svctype, hostname, buf+2);
return ((strlen(buf) > 2) ? buf+2 : NULL);
case '?': /* No available server to handle the request */
locator_flushcache(svctype, hostname);
return NULL;
}
return NULL;
}
int locator_register_server(char *servername, enum locator_servicetype_t svctype, int weight, enum locator_sticky_t sticky, char *extras)
{
char *buf;
int bufsz;
int res;
bufsz = strlen(servername) + 100;
if (extras) bufsz += (strlen(extras) + 1);
buf = (char *)malloc(bufsz);
if (sticky == LOC_SINGLESERVER) weight = -1;
sprintf(buf, "S|%s|%s|%d|%d|%s", servername, servicetype_names[svctype], weight,
((sticky == LOC_STICKY) ? 1 : 0), (extras ? extras : ""));
res = call_locator(buf, bufsz);
xfree(buf);
return res;
}