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 "conf-parser.h"
  23
  24 #include "resolved-conf.h"
  25
  26 int manager_parse_dns_server(Manager *m, DnsServerType type, const char *string) {
  27         const char *word, *state;
  28         size_t length;
  29         DnsServer *first;
  30         int r;
  31
  32         assert(m);
  33         assert(string);
  34
  35         first = type == DNS_SERVER_FALLBACK ? m->fallback_dns_servers : m->dns_servers;
  36
  37         FOREACH_WORD_QUOTED(word, length, string, state) {
  38                 char buffer[length+1];
  39                 int family;
  40                 union in_addr_union addr;
  41                 bool found = false;
  42                 DnsServer *s;
  43
  44                 memcpy(buffer, word, length);
  45                 buffer[length] = 0;
  46
  47                 r = in_addr_from_string_auto(buffer, &family, &addr);
  48                 if (r < 0) {
  49                         log_warning("Ignoring invalid DNS address '%s'", buffer);
  50                         continue;
  51                 }
  52
  53                 /* Filter out duplicates */
  54                 LIST_FOREACH(servers, s, first)
  55                         if (s->family == family && in_addr_equal(family, &s->address, &addr)) {
  56                                 found = true;
  57                                 break;
  58                         }
  59
  60                 if (found)
  61                         continue;
  62
  63                 r = dns_server_new(m, NULL, type, NULL, family, &addr);
  64                 if (r < 0)
  65                         return r;
  66         }
  67
  68         return 0;
  69 }
  70
  71 int config_parse_dnsv(
  72                 const char *unit,
  73                 const char *filename,
  74                 unsigned line,
  75                 const char *section,
  76                 unsigned section_line,
  77                 const char *lvalue,
  78                 int ltype,
  79                 const char *rvalue,
  80                 void *data,
  81                 void *userdata) {
  82
  83         Manager *m = userdata;
  84         DnsServer **l;
  85         int r;
  86
  87         assert(filename);
  88         assert(lvalue);
  89         assert(rvalue);
  90         assert(m);
  91
  92         if (ltype == DNS_SERVER_FALLBACK)
  93                 l = &m->fallback_dns_servers;
  94         else
  95                 l = &m->dns_servers;
  96
  97         /* Empty assignment means clear the list */
  98         if (isempty(rvalue)) {
  99                 while (*l)
 100                         dns_server_free(*l);
 101
 102                 return 0;
 103         }
 104
 105         r = manager_parse_dns_server(m, ltype, rvalue);
 106         if (r < 0) {
 107                 log_syntax(unit, LOG_ERR, filename, line, -r, "Failed to parse DNS server string '%s'. Ignoring.", rvalue);
 108                 return 0;
 109         }
 110
 111         return 0;
 112 }
 113
 114 int config_parse_support(
 115                 const char *unit,
 116                 const char *filename,
 117                 unsigned line,
 118                 const char *section,
 119                 unsigned section_line,
 120                 const char *lvalue,
 121                 int ltype,
 122                 const char *rvalue,
 123                 void *data,
 124                 void *userdata) {
 125
 126         Manager *m = userdata;
 127         Support support, *v = data;
 128         int r;
 129
 130         assert(filename);
 131         assert(lvalue);
 132         assert(rvalue);
 133         assert(m);
 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(NULL, "/etc/systemd/resolved.conf", NULL,
 154                             "Resolve\0",
 155                             config_item_perf_lookup, resolved_gperf_lookup,
 156                             false, false, true, m);
 157 }