src/network/networkd-util.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2013 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 #include "networkd-util.h"
  24 #include "parse-util.h"
  25 #include "string-util.h"
  26 #include "util.h"
  27
  28 const char *address_family_boolean_to_string(AddressFamilyBoolean b) {
  29         if (b == ADDRESS_FAMILY_YES ||
  30             b == ADDRESS_FAMILY_NO)
  31                 return yes_no(b == ADDRESS_FAMILY_YES);
  32
  33         if (b == ADDRESS_FAMILY_IPV4)
  34                 return "ipv4";
  35         if (b == ADDRESS_FAMILY_IPV6)
  36                 return "ipv6";
  37
  38         return NULL;
  39 }
  40
  41 AddressFamilyBoolean address_family_boolean_from_string(const char *s) {
  42         int r;
  43
  44         /* Make this a true superset of a boolean */
  45
  46         r = parse_boolean(s);
  47         if (r > 0)
  48                 return ADDRESS_FAMILY_YES;
  49         if (r == 0)
  50                 return ADDRESS_FAMILY_NO;
  51
  52         if (streq(s, "ipv4"))
  53                 return ADDRESS_FAMILY_IPV4;
  54         if (streq(s, "ipv6"))
  55                 return ADDRESS_FAMILY_IPV6;
  56
  57         return _ADDRESS_FAMILY_BOOLEAN_INVALID;
  58 }
  59
  60 DEFINE_CONFIG_PARSE_ENUM(config_parse_address_family_boolean, address_family_boolean, AddressFamilyBoolean, "Failed to parse option");
  61
  62 int config_parse_address_family_boolean_with_kernel(
  63                 const char* unit,
  64                 const char *filename,
  65                 unsigned line,
  66                 const char *section,
  67                 unsigned section_line,
  68                 const char *lvalue,
  69                 int ltype,
  70                 const char *rvalue,
  71                 void *data,
  72                 void *userdata) {
  73
  74         AddressFamilyBoolean *fwd = data, s;
  75
  76         assert(filename);
  77         assert(lvalue);
  78         assert(rvalue);
  79         assert(data);
  80
  81         s = address_family_boolean_from_string(rvalue);
  82         if (s < 0) {
  83                 if (streq(rvalue, "kernel"))
  84                         s = _ADDRESS_FAMILY_BOOLEAN_INVALID;
  85                 else {
  86                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse IPForwarding= option, ignoring: %s", rvalue);
  87                         return 0;
  88                 }
  89         }
  90
  91         *fwd = s;
  92
  93         return 0;
  94 }
  95
  96 static const char* const resolve_support_table[_RESOLVE_SUPPORT_MAX] = {
  97         [RESOLVE_SUPPORT_NO] = "no",
  98         [RESOLVE_SUPPORT_YES] = "yes",
  99         [RESOLVE_SUPPORT_RESOLVE] = "resolve",
 100 };
 101
 102 DEFINE_STRING_TABLE_LOOKUP(resolve_support, ResolveSupport);
 103
 104 int config_parse_resolve(
 105                 const char* unit,
 106                 const char *filename,
 107                 unsigned line,
 108                 const char *section,
 109                 unsigned section_line,
 110                 const char *lvalue,
 111                 int ltype,
 112                 const char *rvalue,
 113                 void *data,
 114                 void *userdata) {
 115
 116         ResolveSupport *resolve = data;
 117         int k;
 118
 119         assert(filename);
 120         assert(lvalue);
 121         assert(rvalue);
 122         assert(resolve);
 123
 124         /* Our enum shall be a superset of booleans, hence first try
 125          * to parse as boolean, and then as enum */
 126
 127         k = parse_boolean(rvalue);
 128         if (k > 0)
 129                 *resolve = RESOLVE_SUPPORT_YES;
 130         else if (k == 0)
 131                 *resolve = RESOLVE_SUPPORT_NO;
 132         else {
 133                 ResolveSupport s;
 134
 135                 s = resolve_support_from_string(rvalue);
 136                 if (s < 0){
 137                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse %s= option, ignoring: %s", lvalue, rvalue);
 138                         return 0;
 139                 }
 140
 141                 *resolve = s;
 142         }
 143
 144         return 0;
 145 }