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-rw-r--r--src/grp-resolve/systemd-resolved/resolved-conf.c252
1 files changed, 252 insertions, 0 deletions
diff --git a/src/grp-resolve/systemd-resolved/resolved-conf.c b/src/grp-resolve/systemd-resolved/resolved-conf.c
new file mode 100644
index 0000000000..48aa2da331
--- /dev/null
+++ b/src/grp-resolve/systemd-resolved/resolved-conf.c
@@ -0,0 +1,252 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2014 Tom Gundersen <teg@jklm.no>
+
+ 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 "systemd-basic/alloc-util.h"
+#include "systemd-basic/def.h"
+#include "systemd-basic/extract-word.h"
+#include "systemd-basic/parse-util.h"
+#include "systemd-basic/string-table.h"
+#include "systemd-basic/string-util.h"
+#include "systemd-shared/conf-parser.h"
+
+#include "resolved-conf.h"
+
+DEFINE_CONFIG_PARSE_ENUM(config_parse_dns_stub_listener_mode, dns_stub_listener_mode, DnsStubListenerMode, "Failed to parse DNS stub listener mode setting");
+
+static const char* const dns_stub_listener_mode_table[_DNS_STUB_LISTENER_MODE_MAX] = {
+ [DNS_STUB_LISTENER_NO] = "no",
+ [DNS_STUB_LISTENER_UDP] = "udp",
+ [DNS_STUB_LISTENER_TCP] = "tcp",
+ [DNS_STUB_LISTENER_YES] = "yes",
+};
+DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(dns_stub_listener_mode, DnsStubListenerMode, DNS_STUB_LISTENER_YES);
+
+int manager_add_dns_server_by_string(Manager *m, DnsServerType type, const char *word) {
+ union in_addr_union address;
+ int family, r, ifindex = 0;
+ DnsServer *s;
+
+ assert(m);
+ assert(word);
+
+ r = in_addr_ifindex_from_string_auto(word, &family, &address, &ifindex);
+ if (r < 0)
+ return r;
+
+ /* Silently filter out 0.0.0.0 and 127.0.0.53 (our own stub DNS listener) */
+ if (!dns_server_address_valid(family, &address))
+ return 0;
+
+ /* Filter out duplicates */
+ s = dns_server_find(manager_get_first_dns_server(m, type), family, &address, ifindex);
+ if (s) {
+ /*
+ * Drop the marker. This is used to find the servers
+ * that ceased to exist, see
+ * manager_mark_dns_servers() and
+ * manager_flush_marked_dns_servers().
+ */
+ dns_server_move_back_and_unmark(s);
+ return 0;
+ }
+
+ return dns_server_new(m, NULL, type, NULL, family, &address, ifindex);
+}
+
+int manager_parse_dns_server_string_and_warn(Manager *m, DnsServerType type, const char *string) {
+ int r;
+
+ assert(m);
+ assert(string);
+
+ for (;;) {
+ _cleanup_free_ char *word = NULL;
+
+ r = extract_first_word(&string, &word, NULL, 0);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ r = manager_add_dns_server_by_string(m, type, word);
+ if (r < 0)
+ log_warning_errno(r, "Failed to add DNS server address '%s', ignoring: %m", word);
+ }
+
+ return 0;
+}
+
+int manager_add_search_domain_by_string(Manager *m, const char *domain) {
+ DnsSearchDomain *d;
+ bool route_only;
+ int r;
+
+ assert(m);
+ assert(domain);
+
+ route_only = *domain == '~';
+ if (route_only)
+ domain++;
+
+ if (dns_name_is_root(domain) || streq(domain, "*")) {
+ route_only = true;
+ domain = ".";
+ }
+
+ r = dns_search_domain_find(m->search_domains, domain, &d);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ dns_search_domain_move_back_and_unmark(d);
+ else {
+ r = dns_search_domain_new(m, &d, DNS_SEARCH_DOMAIN_SYSTEM, NULL, domain);
+ if (r < 0)
+ return r;
+ }
+
+ d->route_only = route_only;
+ return 0;
+}
+
+int manager_parse_search_domains_and_warn(Manager *m, const char *string) {
+ int r;
+
+ assert(m);
+ assert(string);
+
+ for (;;) {
+ _cleanup_free_ char *word = NULL;
+
+ r = extract_first_word(&string, &word, NULL, EXTRACT_QUOTES);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ r = manager_add_search_domain_by_string(m, word);
+ if (r < 0)
+ log_warning_errno(r, "Failed to add search domain '%s', ignoring: %m", word);
+ }
+
+ return 0;
+}
+
+int config_parse_dns_servers(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ Manager *m = userdata;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(m);
+
+ if (isempty(rvalue))
+ /* Empty assignment means clear the list */
+ dns_server_unlink_all(manager_get_first_dns_server(m, ltype));
+ else {
+ /* Otherwise, add to the list */
+ r = manager_parse_dns_server_string_and_warn(m, ltype, rvalue);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse DNS server string '%s'. Ignoring.", rvalue);
+ return 0;
+ }
+ }
+
+ /* If we have a manual setting, then we stop reading
+ * /etc/resolv.conf */
+ if (ltype == DNS_SERVER_SYSTEM)
+ m->read_resolv_conf = false;
+ if (ltype == DNS_SERVER_FALLBACK)
+ m->need_builtin_fallbacks = false;
+
+ return 0;
+}
+
+int config_parse_search_domains(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ Manager *m = userdata;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(m);
+
+ if (isempty(rvalue))
+ /* Empty assignment means clear the list */
+ dns_search_domain_unlink_all(m->search_domains);
+ else {
+ /* Otherwise, add to the list */
+ r = manager_parse_search_domains_and_warn(m, rvalue);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse search domains string '%s'. Ignoring.", rvalue);
+ return 0;
+ }
+ }
+
+ /* If we have a manual setting, then we stop reading
+ * /etc/resolv.conf */
+ m->read_resolv_conf = false;
+
+ return 0;
+}
+
+int manager_parse_config_file(Manager *m) {
+ int r;
+
+ assert(m);
+
+ r = config_parse_many_nulstr(PKGSYSCONFDIR "/resolved.conf",
+ CONF_PATHS_NULSTR("systemd/resolved.conf.d"),
+ "Resolve\0",
+ config_item_perf_lookup, resolved_gperf_lookup,
+ false, m);
+ if (r < 0)
+ return r;
+
+ if (m->need_builtin_fallbacks) {
+ r = manager_parse_dns_server_string_and_warn(m, DNS_SERVER_FALLBACK, DNS_SERVERS);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+
+}
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