src/network/networkd.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 "sd-daemon.h"
  21
  22 #include "capability-util.h"
  23 #include "networkd.h"
  24 #include "networkd-conf.h"
  25 #include "signal-util.h"
  26 #include "user-util.h"
  27
  28 int main(int argc, char *argv[]) {
  29         _cleanup_manager_free_ Manager *m = NULL;
  30         const char *user = "systemd-network";
  31         uid_t uid;
  32         gid_t gid;
  33         int r;
  34
  35         log_set_target(LOG_TARGET_AUTO);
  36         log_parse_environment();
  37         log_open();
  38
  39         umask(0022);
  40
  41         if (argc != 1) {
  42                 log_error("This program takes no arguments.");
  43                 r = -EINVAL;
  44                 goto out;
  45         }
  46
  47         r = get_user_creds(&user, &uid, &gid, NULL, NULL);
  48         if (r < 0) {
  49                 log_error_errno(r, "Cannot resolve user name %s: %m", user);
  50                 goto out;
  51         }
  52
  53         /* Always create the directories people can create inotify
  54          * watches in. */
  55         r = mkdir_safe_label("/run/systemd/netif", 0755, uid, gid);
  56         if (r < 0)
  57                 log_warning_errno(r, "Could not create runtime directory: %m");
  58
  59         r = mkdir_safe_label("/run/systemd/netif/links", 0755, uid, gid);
  60         if (r < 0)
  61                 log_warning_errno(r, "Could not create runtime directory 'links': %m");
  62
  63         r = mkdir_safe_label("/run/systemd/netif/leases", 0755, uid, gid);
  64         if (r < 0)
  65                 log_warning_errno(r, "Could not create runtime directory 'leases': %m");
  66
  67         r = mkdir_safe_label("/run/systemd/netif/lldp", 0755, uid, gid);
  68         if (r < 0)
  69                 log_warning_errno(r, "Could not create runtime directory 'lldp': %m");
  70
  71         r = drop_privileges(uid, gid,
  72                             (1ULL << CAP_NET_ADMIN) |
  73                             (1ULL << CAP_NET_BIND_SERVICE) |
  74                             (1ULL << CAP_NET_BROADCAST) |
  75                             (1ULL << CAP_NET_RAW));
  76         if (r < 0)
  77                 goto out;
  78
  79         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
  80
  81         r = manager_new(&m);
  82         if (r < 0) {
  83                 log_error_errno(r, "Could not create manager: %m");
  84                 goto out;
  85         }
  86
  87         r = manager_connect_bus(m);
  88         if (r < 0) {
  89                 log_error_errno(r, "Could not connect to bus: %m");
  90                 goto out;
  91         }
  92
  93         r = manager_parse_config_file(m);
  94         if (r < 0)
  95                 log_warning_errno(r, "Failed to parse configuration file: %m");
  96
  97         r = manager_load_config(m);
  98         if (r < 0) {
  99                 log_error_errno(r, "Could not load configuration files: %m");
 100                 goto out;
 101         }
 102
 103         r = manager_rtnl_enumerate_links(m);
 104         if (r < 0) {
 105                 log_error_errno(r, "Could not enumerate links: %m");
 106                 goto out;
 107         }
 108
 109         r = manager_rtnl_enumerate_addresses(m);
 110         if (r < 0) {
 111                 log_error_errno(r, "Could not enumerate addresses: %m");
 112                 goto out;
 113         }
 114
 115         r = manager_rtnl_enumerate_routes(m);
 116         if (r < 0) {
 117                 log_error_errno(r, "Could not enumerate routes: %m");
 118                 goto out;
 119         }
 120
 121         log_info("Enumeration completed");
 122
 123         sd_notify(false,
 124                   "READY=1\n"
 125                   "STATUS=Processing requests...");
 126
 127         r = manager_run(m);
 128         if (r < 0) {
 129                 log_error_errno(r, "Event loop failed: %m");
 130                 goto out;
 131         }
 132
 133 out:
 134         sd_notify(false,
 135                   "STOPPING=1\n"
 136                   "STATUS=Shutting down...");
 137
 138         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 139 }