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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2013 Tom Gundersen <teg@jklm.no>
***/
#include "sd-daemon.h"
#include "sd-event.h"
#include "capability-util.h"
#include "networkd-conf.h"
#include "networkd-manager.h"
#include "signal-util.h"
#include "user-util.h"
int main(int argc, char *argv[]) {
sd_event *event = NULL;
_cleanup_manager_free_ Manager *m = NULL;
const char *user = "systemd-network";
uid_t uid;
gid_t gid;
int r;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
umask(0022);
if (argc != 1) {
log_error("This program takes no arguments.");
r = -EINVAL;
goto out;
}
r = get_user_creds(&user, &uid, &gid, NULL, NULL);
if (r < 0) {
log_error_errno(r, "Cannot resolve user name %s: %m", user);
goto out;
}
/* Create runtime directory. This is not necessary when networkd is
* started with "RuntimeDirectory=systemd/netif", or after
* systemd-tmpfiles-setup.service. */
r = mkdir_safe_label("/run/systemd/netif", 0755, uid, gid, MKDIR_WARN_MODE);
if (r < 0)
log_warning_errno(r, "Could not create runtime directory: %m");
/* Drop privileges, but only if we have been started as root. If we are not running as root we assume all
* privileges are already dropped. */
if (geteuid() == 0) {
r = drop_privileges(uid, gid,
(1ULL << CAP_NET_ADMIN) |
(1ULL << CAP_NET_BIND_SERVICE) |
(1ULL << CAP_NET_BROADCAST) |
(1ULL << CAP_NET_RAW));
if (r < 0)
goto out;
}
/* Always create the directories people can create inotify watches in.
* It is necessary to create the following subdirectories after drop_privileges()
* to support old kernels not supporting AmbientCapabilities=. */
r = mkdir_safe_label("/run/systemd/netif/links", 0755, uid, gid, MKDIR_WARN_MODE);
if (r < 0)
log_warning_errno(r, "Could not create runtime directory 'links': %m");
r = mkdir_safe_label("/run/systemd/netif/leases", 0755, uid, gid, MKDIR_WARN_MODE);
if (r < 0)
log_warning_errno(r, "Could not create runtime directory 'leases': %m");
r = mkdir_safe_label("/run/systemd/netif/lldp", 0755, uid, gid, MKDIR_WARN_MODE);
if (r < 0)
log_warning_errno(r, "Could not create runtime directory 'lldp': %m");
assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
r = sd_event_default(&event);
if (r < 0)
goto out;
sd_event_set_watchdog(event, true);
sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
r = manager_new(&m, event);
if (r < 0) {
log_error_errno(r, "Could not create manager: %m");
goto out;
}
r = manager_connect_bus(m);
if (r < 0) {
log_error_errno(r, "Could not connect to bus: %m");
goto out;
}
r = manager_parse_config_file(m);
if (r < 0)
log_warning_errno(r, "Failed to parse configuration file: %m");
r = manager_load_config(m);
if (r < 0) {
log_error_errno(r, "Could not load configuration files: %m");
goto out;
}
r = manager_rtnl_enumerate_links(m);
if (r < 0) {
log_error_errno(r, "Could not enumerate links: %m");
goto out;
}
r = manager_rtnl_enumerate_addresses(m);
if (r < 0) {
log_error_errno(r, "Could not enumerate addresses: %m");
goto out;
}
r = manager_rtnl_enumerate_routes(m);
if (r < 0) {
log_error_errno(r, "Could not enumerate routes: %m");
goto out;
}
r = manager_rtnl_enumerate_rules(m);
if (r < 0) {
log_error_errno(r, "Could not enumerate rules: %m");
goto out;
}
r = manager_start(m);
if (r < 0) {
log_error_errno(r, "Could not start manager: %m");
goto out;
}
log_info("Enumeration completed");
sd_notify(false,
"READY=1\n"
"STATUS=Processing requests...");
r = sd_event_loop(event);
if (r < 0) {
log_error_errno(r, "Event loop failed: %m");
goto out;
}
out:
sd_notify(false,
"STOPPING=1\n"
"STATUS=Shutting down...");
sd_event_unref(event);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
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