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