src/resolve/resolved-conf.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2014 Tom Gundersen <teg@jklm.no>
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20  ***/
  21
  22 #include "alloc-util.h"
  23 #include "conf-parser.h"
  24 #include "def.h"
  25 #include "extract-word.h"
  26 #include "parse-util.h"
  27 #include "resolved-conf.h"
  28 #include "string-util.h"
  29
  30 int manager_parse_dns_server(Manager *m, DnsServerType type, const char *string) {
  31         DnsServer *first;
  32         int r;
  33
  34         assert(m);
  35         assert(string);
  36
  37         first = type == DNS_SERVER_FALLBACK ? m->fallback_dns_servers : m->dns_servers;
  38
  39         for(;;) {
  40                 _cleanup_free_ char *word = NULL;
  41                 union in_addr_union addr;
  42                 bool found = false;
  43                 DnsServer *s;
  44                 int family;
  45
  46                 r = extract_first_word(&string, &word, NULL, 0);
  47                 if (r < 0)
  48                         return log_error_errno(r, "Failed to parse resolved dns server syntax \"%s\": %m", string);
  49                 if (r == 0)
  50                         break;
  51
  52                 r = in_addr_from_string_auto(word, &family, &addr);
  53                 if (r < 0) {
  54                         log_warning("Ignoring invalid DNS address '%s'", word);
  55                         continue;
  56                 }
  57
  58                 /* Filter out duplicates */
  59                 LIST_FOREACH(servers, s, first)
  60                         if (s->family == family && in_addr_equal(family, &s->address, &addr)) {
  61                                 found = true;
  62                                 break;
  63                         }
  64
  65                 if (found)
  66                         continue;
  67
  68                 r = dns_server_new(m, NULL, type, NULL, family, &addr);
  69                 if (r < 0)
  70                         return r;
  71         }
  72
  73         return 0;
  74 }
  75
  76 int config_parse_dnsv(
  77                 const char *unit,
  78                 const char *filename,
  79                 unsigned line,
  80                 const char *section,
  81                 unsigned section_line,
  82                 const char *lvalue,
  83                 int ltype,
  84                 const char *rvalue,
  85                 void *data,
  86                 void *userdata) {
  87
  88         Manager *m = userdata;
  89         int r;
  90
  91         assert(filename);
  92         assert(lvalue);
  93         assert(rvalue);
  94         assert(m);
  95
  96         if (isempty(rvalue))
  97                 /* Empty assignment means clear the list */
  98                 manager_flush_dns_servers(m, ltype);
  99         else {
 100                 /* Otherwise, add to the list */
 101                 r = manager_parse_dns_server(m, ltype, rvalue);
 102                 if (r < 0) {
 103                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse DNS server string '%s'. Ignoring.", rvalue);
 104                         return 0;
 105                 }
 106         }
 107
 108         /* If we have a manual setting, then we stop reading
 109          * /etc/resolv.conf */
 110         if (ltype == DNS_SERVER_SYSTEM)
 111                 m->read_resolv_conf = false;
 112
 113         return 0;
 114 }
 115
 116 int config_parse_support(
 117                 const char *unit,
 118                 const char *filename,
 119                 unsigned line,
 120                 const char *section,
 121                 unsigned section_line,
 122                 const char *lvalue,
 123                 int ltype,
 124                 const char *rvalue,
 125                 void *data,
 126                 void *userdata) {
 127
 128         Support support, *v = data;
 129         int r;
 130
 131         assert(filename);
 132         assert(lvalue);
 133         assert(rvalue);
 134
 135         support = support_from_string(rvalue);
 136         if (support < 0) {
 137                 r = parse_boolean(rvalue);
 138                 if (r < 0) {
 139                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse support level '%s'. Ignoring.", rvalue);
 140                         return 0;
 141                 }
 142
 143                 support = r ? SUPPORT_YES : SUPPORT_NO;
 144         }
 145
 146         *v = support;
 147         return 0;
 148 }
 149
 150 int manager_parse_config_file(Manager *m) {
 151         assert(m);
 152
 153         return config_parse_many(PKGSYSCONFDIR "/resolved.conf",
 154                                  CONF_PATHS_NULSTR("systemd/resolved.conf.d"),
 155                                  "Resolve\0",
 156                                  config_item_perf_lookup, resolved_gperf_lookup,
 157                                  false, m);
 158 }