/**
* deletes all entries in a cidr and destroys the datastructure
*/
void
destroy_cidr(tcpr_cidr_t * cidr)
{
if (cidr != NULL) {
if (cidr->next != NULL)
destroy_cidr(cidr->next);
safe_free(cidr);
}
return;
}
/**
* processes the tree using rbwalk / tree2cidr to generate a CIDR
* used for 2nd pass, router mode
*
* returns > 0 for success (the mask len), 0 for fail
*/
int
process_tree(void)
{
int mymask = 0;
tcpr_buildcidr_t *bcdata;
tcpprep_opt_t *options = tcpprep->options;
dbg(1, "Running: process_tree()");
bcdata = (tcpr_buildcidr_t *)safe_malloc(sizeof(tcpr_buildcidr_t));
for (mymask = options->max_mask; mymask <= options->min_mask; mymask++) {
dbgx(1, "Current mask: %u", mymask);
/* set starting vals */
bcdata->type = DIR_SERVER;
bcdata->masklen = mymask;
/* build cidrdata with servers */
tree_buildcidr(&treeroot, bcdata);
/* calculate types of all IP's */
tree_calculate(&treeroot);
/* try to find clients in cidrdata */
bcdata->type = DIR_CLIENT;
if (! tree_checkincidr(&treeroot, bcdata)) { /* didn't find any clients in cidrdata */
safe_free(bcdata);
return (mymask); /* success! */
}
else {
destroy_cidr(options->cidrdata); /* clean up after our mess */
options->cidrdata = NULL;
}
}
safe_free(bcdata);
/* we failed to find a valid cidr list */
notice("Unable to determine any IP addresses as a clients.");
notice("Perhaps you should change the --ratio, --minmask/maxmask settings, or try another mode?");
return (0);
}
int
process_tree()
{
int mymask = 0;
BUILDCIDR *bcdata;
if ((bcdata = (BUILDCIDR *) malloc(sizeof(BUILDCIDR))) == NULL)
err(1, "malloc");
for (mymask = max_mask; mymask <= min_mask; mymask++) {
dbg(1, "Current mask: %u", mymask);
/* set starting vals */
bcdata->type = SERVER;
bcdata->masklen = mymask;
/* build cidrdata with servers */
tree_buildcidr(&treeroot, bcdata);
/* calculate types of all IP's */
tree_calculate(&treeroot);
/* try to find clients in cidrdata */
checkincidr = 0;
bcdata->type = CLIENT;
tree_checkincidr(&treeroot, bcdata);
if (checkincidr == 0) { /* didn't find any clients in cidrdata */
return (mymask); /* success! */
}
else {
destroy_cidr(cidrdata); /* clean up after our mess */
cidrdata = NULL;
}
}
/* we failed to find a vaild cidr list */
return (0);
}