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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2015 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "alloc-util.h"
#include "dns-domain.h"
#include "resolved-dns-search-domain.h"
int dns_search_domain_new(
Manager *m,
DnsSearchDomain **ret,
DnsSearchDomainType type,
Link *l,
const char *name) {
_cleanup_free_ char *normalized = NULL;
DnsSearchDomain *d;
int r;
assert(m);
assert((type == DNS_SEARCH_DOMAIN_LINK) == !!l);
assert(name);
r = dns_name_normalize(name, &normalized);
if (r < 0)
return r;
if (dns_name_is_root(normalized))
return -EINVAL;
if (l) {
if (l->n_search_domains >= LINK_SEARCH_DOMAINS_MAX)
return -E2BIG;
} else {
if (m->n_search_domains >= MANAGER_SEARCH_DOMAINS_MAX)
return -E2BIG;
}
d = new0(DnsSearchDomain, 1);
if (!d)
return -ENOMEM;
d->n_ref = 1;
d->manager = m;
d->type = type;
d->name = normalized;
normalized = NULL;
switch (type) {
case DNS_SEARCH_DOMAIN_LINK:
d->link = l;
LIST_APPEND(domains, l->search_domains, d);
l->n_search_domains++;
break;
case DNS_SERVER_SYSTEM:
LIST_APPEND(domains, m->search_domains, d);
m->n_search_domains++;
break;
default:
assert_not_reached("Unknown search domain type");
}
d->linked = true;
if (ret)
*ret = d;
return 0;
}
DnsSearchDomain* dns_search_domain_ref(DnsSearchDomain *d) {
if (!d)
return NULL;
assert(d->n_ref > 0);
d->n_ref++;
return d;
}
DnsSearchDomain* dns_search_domain_unref(DnsSearchDomain *d) {
if (!d)
return NULL;
assert(d->n_ref > 0);
d->n_ref--;
if (d->n_ref > 0)
return NULL;
free(d->name);
free(d);
return NULL;
}
void dns_search_domain_unlink(DnsSearchDomain *d) {
assert(d);
assert(d->manager);
if (!d->linked)
return;
switch (d->type) {
case DNS_SEARCH_DOMAIN_LINK:
assert(d->link);
assert(d->link->n_search_domains > 0);
LIST_REMOVE(domains, d->link->search_domains, d);
d->link->n_search_domains--;
break;
case DNS_SEARCH_DOMAIN_SYSTEM:
assert(d->manager->n_search_domains > 0);
LIST_REMOVE(domains, d->manager->search_domains, d);
d->manager->n_search_domains--;
break;
}
d->linked = false;
dns_search_domain_unref(d);
}
void dns_search_domain_move_back_and_unmark(DnsSearchDomain *d) {
DnsSearchDomain *tail;
assert(d);
if (!d->marked)
return;
d->marked = false;
if (!d->linked || !d->domains_next)
return;
switch (d->type) {
case DNS_SEARCH_DOMAIN_LINK:
assert(d->link);
LIST_FIND_TAIL(domains, d, tail);
LIST_REMOVE(domains, d->link->search_domains, d);
LIST_INSERT_AFTER(domains, d->link->search_domains, tail, d);
break;
case DNS_SEARCH_DOMAIN_SYSTEM:
LIST_FIND_TAIL(domains, d, tail);
LIST_REMOVE(domains, d->manager->search_domains, d);
LIST_INSERT_AFTER(domains, d->manager->search_domains, tail, d);
break;
default:
assert_not_reached("Unknown search domain type");
}
}
void dns_search_domain_unlink_all(DnsSearchDomain *first) {
DnsSearchDomain *next;
if (!first)
return;
next = first->domains_next;
dns_search_domain_unlink(first);
dns_search_domain_unlink_all(next);
}
void dns_search_domain_unlink_marked(DnsSearchDomain *first) {
DnsSearchDomain *next;
if (!first)
return;
next = first->domains_next;
if (first->marked)
dns_search_domain_unlink(first);
dns_search_domain_unlink_marked(next);
}
void dns_search_domain_mark_all(DnsSearchDomain *first) {
if (!first)
return;
first->marked = true;
dns_search_domain_mark_all(first->domains_next);
}
int dns_search_domain_find(DnsSearchDomain *first, const char *name, DnsSearchDomain **ret) {
DnsSearchDomain *d;
int r;
assert(name);
assert(ret);
LIST_FOREACH(domains, d, first) {
r = dns_name_equal(name, d->name);
if (r < 0)
return r;
if (r > 0) {
*ret = d;
return 1;
}
}
*ret = NULL;
return 0;
}
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