Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 199 insertions, 0 deletions

diff --git a/src/resolve/resolved-dns-search-domain.c b/src/resolve/resolved-dns-search-domain.c
new file mode 100644
index 0000000..a11b213
--- /dev/null
+++ b/src/resolve/resolved-dns-search-domain.c
@@ -0,0 +1,199 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "alloc-util.h"
+#include "dns-domain.h"
+#include "resolved-dns-search-domain.h"
+#include "resolved-link.h"
+#include "resolved-manager.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, 0, &normalized);
+        if (r < 0)
+                return r;
+
+        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 = new(DnsSearchDomain, 1);
+        if (!d)
+                return -ENOMEM;
+
+        *d = (DnsSearchDomain) {
+                .n_ref = 1,
+                .manager = m,
+                .type = type,
+                .name = TAKE_PTR(normalized),
+        };
+
+        switch (type) {
+
+        case DNS_SEARCH_DOMAIN_LINK:
+                d->link = l;
+                LIST_APPEND(domains, l->search_domains, d);
+                l->n_search_domains++;
+                break;
+
+        case DNS_SEARCH_DOMAIN_SYSTEM:
+                LIST_APPEND(domains, m->search_domains, d);
+                m->n_search_domains++;
+                break;
+
+        default:
+                assert_not_reached();
+        }
+
+        d->linked = true;
+
+        if (ret)
+                *ret = d;
+
+        return 0;
+}
+
+static DnsSearchDomain* dns_search_domain_free(DnsSearchDomain *d) {
+        assert(d);
+
+        free(d->name);
+        return mfree(d);
+}
+
+DEFINE_TRIVIAL_REF_UNREF_FUNC(DnsSearchDomain, dns_search_domain, dns_search_domain_free);
+
+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);
+                tail = LIST_FIND_TAIL(domains, d);
+                LIST_REMOVE(domains, d->link->search_domains, d);
+                LIST_INSERT_AFTER(domains, d->link->search_domains, tail, d);
+                break;
+
+        case DNS_SEARCH_DOMAIN_SYSTEM:
+                tail = LIST_FIND_TAIL(domains, d);
+                LIST_REMOVE(domains, d->manager->search_domains, d);
+                LIST_INSERT_AFTER(domains, d->manager->search_domains, tail, d);
+                break;
+
+        default:
+                assert_not_reached();
+        }
+}
+
+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);
+}
+
+bool dns_search_domain_unlink_marked(DnsSearchDomain *first) {
+        DnsSearchDomain *next;
+        bool changed;
+
+        if (!first)
+                return false;
+
+        next = first->domains_next;
+
+        if (first->marked) {
+                dns_search_domain_unlink(first);
+                changed = true;
+        } else
+                changed = false;
+
+        return dns_search_domain_unlink_marked(next) || changed;
+}
+
+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) {
+        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;
+}