src/networkd/zones.c

   1 /*#############################################################################
   2 #                                                                             #
   3 # IPFire.org - A linux based firewall                                         #
   4 # Copyright (C) 2023 IPFire Network Development Team                          #
   5 #                                                                             #
   6 # This program is free software: you can redistribute it and/or modify        #
   7 # it under the terms of the GNU General Public License as published by        #
   8 # the Free Software Foundation, either version 3 of the License, or           #
   9 # (at your option) any later version.                                         #
  10 #                                                                             #
  11 # This program is distributed in the hope that it will be useful,             #
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  14 # GNU General Public License for more details.                                #
  15 #                                                                             #
  16 # You should have received a copy of the GNU General Public License           #
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  18 #                                                                             #
  19 #############################################################################*/
  20
  21 #include <dirent.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <sys/queue.h>
  25
  26 #include "daemon.h"
  27 #include "logging.h"
  28 #include "string.h"
  29 #include "util.h"
  30 #include "zone.h"
  31 #include "zones.h"
  32
  33 struct nw_zones_entry {
  34         nw_zone* zone;
  35
  36         // Link to the other entries
  37         STAILQ_ENTRY(nw_zones_entry) nodes;
  38 };
  39
  40 struct nw_zones {
  41         nw_daemon* daemon;
  42         int nrefs;
  43
  44         // Zone Entries
  45         STAILQ_HEAD(entries, nw_zones_entry) entries;
  46
  47         // A counter of the zone entries
  48         unsigned int num;
  49 };
  50
  51 int nw_zones_create(nw_zones** zones, nw_daemon* daemon) {
  52         nw_zones* z = calloc(1, sizeof(*z));
  53         if (!z)
  54                 return 1;
  55
  56         // Store a reference to the daemon
  57         z->daemon = nw_daemon_ref(daemon);
  58
  59         // Initialize the reference counter
  60         z->nrefs = 1;
  61
  62         // Initialize entries
  63         STAILQ_INIT(&z->entries);
  64
  65         // Reference the pointer
  66         *zones = z;
  67
  68         return 0;
  69 }
  70
  71 static void nw_zones_free(nw_zones* zones) {
  72         struct nw_zones_entry* entry = NULL;
  73
  74         while (!STAILQ_EMPTY(&zones->entries)) {
  75                 entry = STAILQ_FIRST(&zones->entries);
  76
  77                 // Dereference the zone
  78                 nw_zone_unref(entry->zone);
  79
  80                 // Remove the entry from the list
  81                 STAILQ_REMOVE_HEAD(&zones->entries, nodes);
  82
  83                 // Free the entry
  84                 free(entry);
  85         }
  86
  87         if (zones->daemon)
  88                 nw_daemon_unref(zones->daemon);
  89
  90         free(zones);
  91 }
  92
  93 nw_zones* nw_zones_ref(nw_zones* zones) {
  94         zones->nrefs++;
  95
  96         return zones;
  97 }
  98
  99 nw_zones* nw_zones_unref(nw_zones* zones) {
 100         if (--zones->nrefs > 0)
 101                 return zones;
 102
 103         nw_zones_free(zones);
 104         return NULL;
 105 }
 106
 107 static int nw_zones_add_zone(nw_zones* zones, nw_zone* zone) {
 108         // Allocate a new entry
 109         struct nw_zones_entry* entry = calloc(1, sizeof(*entry));
 110         if (!entry)
 111                 return 1;
 112
 113         // Reference the zone
 114         entry->zone = nw_zone_ref(zone);
 115
 116         // Add it to the list
 117         STAILQ_INSERT_TAIL(&zones->entries, entry, nodes);
 118
 119         // Increment the counter
 120         zones->num++;
 121
 122         return 0;
 123 }
 124
 125 static int __nw_zones_enumerate(const char* path, const struct stat* s, void* data) {
 126         nw_zone* zone = NULL;
 127         int r;
 128
 129         nw_zones* zones = (nw_zones*)data;
 130
 131         // Skip anything that isn't a directory
 132         if (!S_ISDIR(s->st_mode))
 133                 return 0;
 134
 135         // Find the basename of the file
 136         const char* name = nw_path_basename(path);
 137
 138         // Break on invalid paths
 139         if (!name)
 140                 return 0;
 141
 142         // Skip any hidden files
 143         if (*name == '.')
 144                 return 0;
 145
 146         // Create a new zone
 147         r = nw_zone_create(&zone, zones->daemon, name);
 148         if (r)
 149                 goto ERROR;
 150
 151         // Add the zone to the list
 152         r = nw_zones_add_zone(zones, zone);
 153         if (r)
 154                 goto ERROR;
 155
 156 ERROR:
 157         if (zone)
 158                 nw_zone_unref(zone);
 159
 160         return r;
 161 }
 162
 163 int nw_zones_enumerate(nw_zones* zones) {
 164         return nw_ftw(ZONE_CONFIG_DIR, ZONE_CONFIG_DIR "/*", __nw_zones_enumerate, zones);
 165 }
 166
 167 size_t nw_zones_num(nw_zones* zones) {
 168         struct nw_zones_entry* entry = NULL;
 169         size_t length = 0;
 170
 171         // Count all zones
 172         STAILQ_FOREACH(entry, &zones->entries, nodes)
 173                 length++;
 174
 175         return length;
 176 }
 177
 178 nw_zone* nw_zones_get_by_name(nw_zones* zones, const char* name) {
 179         struct nw_zones_entry* entry = NULL;
 180
 181         STAILQ_FOREACH(entry, &zones->entries, nodes) {
 182                 const char* __name = nw_zone_name(entry->zone);
 183
 184                 // If the name matches, return a reference to the zone
 185                 if (strcmp(name, __name) == 0)
 186                         return nw_zone_ref(entry->zone);
 187         }
 188
 189         // No match found
 190         return NULL;
 191 }
 192
 193 int nw_zones_bus_paths(nw_zones* zones, char*** paths) {
 194         struct nw_zones_entry* entry = NULL;
 195         char* path = NULL;
 196
 197         // Allocate an array for all paths
 198         char** p = calloc(zones->num + 1, sizeof(*p));
 199         if (!p)
 200                 return 1;
 201
 202         unsigned int i = 0;
 203
 204         // Walk through all zones
 205         STAILQ_FOREACH(entry, &zones->entries, nodes) {
 206                 // Generate the bus path
 207                 path = nw_zone_bus_path(entry->zone);
 208                 if (!path)
 209                         goto ERROR;
 210
 211                 // Append the bus path to the array
 212                 p[i++] = path;
 213         }
 214
 215         // Return pointer
 216         *paths = p;
 217
 218         return 0;
 219
 220 ERROR:
 221         if (p) {
 222                 for (char** e = p; *e; e++)
 223                         free(*e);
 224                 free(p);
 225         }
 226
 227         return 1;
 228 }