src/network/networkd-util.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2013 Tom Gundersen <teg@jklm.no>
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include "conf-parser.h"
  21 #include "networkd-util.h"
  22 #include "parse-util.h"
  23 #include "string-table.h"
  24 #include "string-util.h"
  25 #include "util.h"
  26
  27 const char *address_family_boolean_to_string(AddressFamilyBoolean b) {
  28         if (IN_SET(b, ADDRESS_FAMILY_YES, ADDRESS_FAMILY_NO))
  29                 return yes_no(b == ADDRESS_FAMILY_YES);
  30
  31         if (b == ADDRESS_FAMILY_IPV4)
  32                 return "ipv4";
  33         if (b == ADDRESS_FAMILY_IPV6)
  34                 return "ipv6";
  35
  36         return NULL;
  37 }
  38
  39 AddressFamilyBoolean address_family_boolean_from_string(const char *s) {
  40         int r;
  41
  42         /* Make this a true superset of a boolean */
  43
  44         r = parse_boolean(s);
  45         if (r > 0)
  46                 return ADDRESS_FAMILY_YES;
  47         if (r == 0)
  48                 return ADDRESS_FAMILY_NO;
  49
  50         if (streq(s, "ipv4"))
  51                 return ADDRESS_FAMILY_IPV4;
  52         if (streq(s, "ipv6"))
  53                 return ADDRESS_FAMILY_IPV6;
  54
  55         return _ADDRESS_FAMILY_BOOLEAN_INVALID;
  56 }
  57
  58 DEFINE_CONFIG_PARSE_ENUM(config_parse_address_family_boolean, address_family_boolean, AddressFamilyBoolean, "Failed to parse option");
  59
  60 int config_parse_address_family_boolean_with_kernel(
  61                 const char* unit,
  62                 const char *filename,
  63                 unsigned line,
  64                 const char *section,
  65                 unsigned section_line,
  66                 const char *lvalue,
  67                 int ltype,
  68                 const char *rvalue,
  69                 void *data,
  70                 void *userdata) {
  71
  72         AddressFamilyBoolean *fwd = data, s;
  73
  74         assert(filename);
  75         assert(lvalue);
  76         assert(rvalue);
  77         assert(data);
  78
  79         /* This function is mostly obsolete now. It simply redirects
  80          * "kernel" to "no". In older networkd versions we used to
  81          * distuingish IPForward=off from IPForward=kernel, where the
  82          * former would explicitly turn off forwarding while the
  83          * latter would simply not touch the setting. But that logic
  84          * is gone, hence silently accept the old setting, but turn it
  85          * to "no". */
  86
  87         s = address_family_boolean_from_string(rvalue);
  88         if (s < 0) {
  89                 if (streq(rvalue, "kernel"))
  90                         s = ADDRESS_FAMILY_NO;
  91                 else {
  92                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse IPForward= option, ignoring: %s", rvalue);
  93                         return 0;
  94                 }
  95         }
  96
  97         *fwd = s;
  98
  99         return 0;
 100 }