Adding upstream version 252.22.upstream/252.22upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 121 insertions, 0 deletions

diff --git a/src/network/networkd.c b/src/network/networkd.c
new file mode 100644
index 0000000..d61769d
--- /dev/null
+++ b/src/network/networkd.c
@@ -0,0 +1,121 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <netinet/in.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "sd-daemon.h"
+#include "sd-event.h"
+
+#include "bus-log-control-api.h"
+#include "capability-util.h"
+#include "daemon-util.h"
+#include "firewall-util.h"
+#include "main-func.h"
+#include "mkdir-label.h"
+#include "networkd-conf.h"
+#include "networkd-manager-bus.h"
+#include "networkd-manager.h"
+#include "service-util.h"
+#include "signal-util.h"
+#include "user-util.h"
+
+static int run(int argc, char *argv[]) {
+        _cleanup_(manager_freep) Manager *m = NULL;
+        _unused_ _cleanup_(notify_on_cleanup) const char *notify_message = NULL;
+        int r;
+
+        log_setup();
+
+        r = service_parse_argv("systemd-networkd.service",
+                               "Manage and configure network devices, create virtual network devices",
+                               BUS_IMPLEMENTATIONS(&manager_object, &log_control_object),
+                               argc, argv);
+        if (r <= 0)
+                return r;
+
+        umask(0022);
+
+        if (argc != 1)
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "This program takes no arguments.");
+
+        /* 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 and we can't create our runtime directory. */
+        if (geteuid() == 0) {
+                const char *user = "systemd-network";
+                uid_t uid;
+                gid_t gid;
+
+                r = get_user_creds(&user, &uid, &gid, NULL, NULL, 0);
+                if (r < 0)
+                        return log_error_errno(r, "Cannot resolve user name %s: %m", user);
+
+                /* 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");
+
+                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)
+                        return log_error_errno(r, "Failed to drop privileges: %m");
+        }
+
+        /* 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_INVALID, GID_INVALID, 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_INVALID, GID_INVALID, 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_INVALID, GID_INVALID, 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 = manager_new(&m, /* test_mode = */ false);
+        if (r < 0)
+                return log_error_errno(r, "Could not create manager: %m");
+
+        r = manager_setup(m);
+        if (r < 0)
+                return log_error_errno(r, "Could not setup manager: %m");
+
+        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)
+                return log_error_errno(r, "Could not load configuration files: %m");
+
+        r = manager_enumerate(m);
+        if (r < 0)
+                return r;
+
+        r = manager_start(m);
+        if (r < 0)
+                return log_error_errno(r, "Could not start manager: %m");
+
+        log_info("Enumeration completed");
+
+        notify_message = notify_start(NOTIFY_READY, NOTIFY_STOPPING);
+
+        r = sd_event_loop(m->event);
+        if (r < 0)
+                return log_error_errno(r, "Event loop failed: %m");
+
+        return 0;
+}
+
+DEFINE_MAIN_FUNCTION(run);