src/network/networkd-conf.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 /***
   3   Copyright © 2014 Vinay Kulkarni <kulkarniv@vmware.com>
   4  ***/
   5
   6 #include <ctype.h>
   7 #include <netinet/ip.h>
   8
   9 #include "conf-parser.h"
  10 #include "def.h"
  11 #include "dhcp-identifier.h"
  12 #include "extract-word.h"
  13 #include "hexdecoct.h"
  14 #include "networkd-conf.h"
  15 #include "networkd-manager.h"
  16 #include "networkd-network.h"
  17 #include "networkd-speed-meter.h"
  18 #include "networkd-dhcp4.h"
  19 #include "string-table.h"
  20
  21 int manager_parse_config_file(Manager *m) {
  22         int r;
  23
  24         assert(m);
  25
  26         r = config_parse_many_nulstr(
  27                         PKGSYSCONFDIR "/networkd.conf",
  28                         CONF_PATHS_NULSTR("systemd/networkd.conf.d"),
  29                         "Network\0"
  30                         "DHCP\0",
  31                         config_item_perf_lookup, networkd_gperf_lookup,
  32                         CONFIG_PARSE_WARN,
  33                         m,
  34                         NULL);
  35         if (r < 0)
  36                 return r;
  37
  38         if (m->use_speed_meter && m->speed_meter_interval_usec < SPEED_METER_MINIMUM_TIME_INTERVAL) {
  39                 char buf[FORMAT_TIMESPAN_MAX];
  40
  41                 log_warning("SpeedMeterIntervalSec= is too small, using %s.",
  42                             format_timespan(buf, sizeof buf, SPEED_METER_MINIMUM_TIME_INTERVAL, USEC_PER_SEC));
  43                 m->speed_meter_interval_usec = SPEED_METER_MINIMUM_TIME_INTERVAL;
  44         }
  45
  46         return 0;
  47 }
  48
  49 static const char* const duid_type_table[_DUID_TYPE_MAX] = {
  50         [DUID_TYPE_LLT]  = "link-layer-time",
  51         [DUID_TYPE_EN]   = "vendor",
  52         [DUID_TYPE_LL]   = "link-layer",
  53         [DUID_TYPE_UUID] = "uuid",
  54 };
  55 DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(duid_type, DUIDType);
  56
  57 int config_parse_duid_type(
  58                 const char *unit,
  59                 const char *filename,
  60                 unsigned line,
  61                 const char *section,
  62                 unsigned section_line,
  63                 const char *lvalue,
  64                 int ltype,
  65                 const char *rvalue,
  66                 void *data,
  67                 void *userdata) {
  68
  69         _cleanup_free_ char *type_string = NULL;
  70         const char *p = rvalue;
  71         DUID *duid = data;
  72         DUIDType type;
  73         int r;
  74
  75         assert(filename);
  76         assert(lvalue);
  77         assert(rvalue);
  78         assert(duid);
  79
  80         r = extract_first_word(&p, &type_string, ":", 0);
  81         if (r == -ENOMEM)
  82                 return log_oom();
  83         if (r < 0) {
  84                 log_syntax(unit, LOG_WARNING, filename, line, r,
  85                            "Invalid syntax, ignoring: %s", rvalue);
  86                 return 0;
  87         }
  88         if (r == 0) {
  89                 log_syntax(unit, LOG_WARNING, filename, line, 0,
  90                            "Failed to extract DUID type from '%s', ignoring.", rvalue);
  91                 return 0;
  92         }
  93
  94         type = duid_type_from_string(type_string);
  95         if (type < 0) {
  96                 log_syntax(unit, LOG_WARNING, filename, line, 0,
  97                            "Failed to parse DUID type '%s', ignoring.", type_string);
  98                 return 0;
  99         }
 100
 101         if (!isempty(p)) {
 102                 usec_t u;
 103
 104                 if (type != DUID_TYPE_LLT) {
 105                         log_syntax(unit, LOG_WARNING, filename, line, r,
 106                                    "Invalid syntax, ignoring: %s", rvalue);
 107                         return 0;
 108                 }
 109
 110                 r = parse_timestamp(p, &u);
 111                 if (r < 0) {
 112                         log_syntax(unit, LOG_WARNING, filename, line, r,
 113                                    "Failed to parse timestamp, ignoring: %s", p);
 114                         return 0;
 115                 }
 116
 117                 duid->llt_time = u;
 118         }
 119
 120         duid->type = type;
 121
 122         return 0;
 123 }
 124
 125 int config_parse_duid_rawdata(
 126                 const char *unit,
 127                 const char *filename,
 128                 unsigned line,
 129                 const char *section,
 130                 unsigned section_line,
 131                 const char *lvalue,
 132                 int ltype,
 133                 const char *rvalue,
 134                 void *data,
 135                 void *userdata) {
 136
 137         DUID *ret = data;
 138         uint8_t raw_data[MAX_DUID_LEN];
 139         unsigned count = 0;
 140
 141         assert(filename);
 142         assert(lvalue);
 143         assert(rvalue);
 144         assert(ret);
 145
 146         /* RawData contains DUID in format "NN:NN:NN..." */
 147         for (const char *p = rvalue;;) {
 148                 int n1, n2, len, r;
 149                 uint32_t byte;
 150                 _cleanup_free_ char *cbyte = NULL;
 151
 152                 r = extract_first_word(&p, &cbyte, ":", 0);
 153                 if (r == -ENOMEM)
 154                         return log_oom();
 155                 if (r < 0) {
 156                         log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to read DUID, ignoring assignment: %s.", rvalue);
 157                         return 0;
 158                 }
 159                 if (r == 0)
 160                         break;
 161
 162                 if (count >= MAX_DUID_LEN) {
 163                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Max DUID length exceeded, ignoring assignment: %s.", rvalue);
 164                         return 0;
 165                 }
 166
 167                 len = strlen(cbyte);
 168                 if (!IN_SET(len, 1, 2)) {
 169                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid length - DUID byte: %s, ignoring assignment: %s.", cbyte, rvalue);
 170                         return 0;
 171                 }
 172                 n1 = unhexchar(cbyte[0]);
 173                 if (len == 2)
 174                         n2 = unhexchar(cbyte[1]);
 175                 else
 176                         n2 = 0;
 177
 178                 if (n1 < 0 || n2 < 0) {
 179                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid DUID byte: %s. Ignoring assignment: %s.", cbyte, rvalue);
 180                         return 0;
 181                 }
 182
 183                 byte = ((uint8_t) n1 << (4 * (len-1))) | (uint8_t) n2;
 184                 raw_data[count++] = byte;
 185         }
 186
 187         assert_cc(sizeof(raw_data) == sizeof(ret->raw_data));
 188         memcpy(ret->raw_data, raw_data, count);
 189         ret->raw_data_len = count;
 190         return 0;
 191 }