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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 02:25:50 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 02:25:50 +0000
commit19f4f86bfed21c5326ed2acebe1163f3a83e832b (patch)
treed59b9989ce55ed23693e80974d94c856f1c2c8b1 /src/network/networkd.c
parentInitial commit. (diff)
downloadsystemd-19f4f86bfed21c5326ed2acebe1163f3a83e832b.tar.xz
systemd-19f4f86bfed21c5326ed2acebe1163f3a83e832b.zip
Adding upstream version 241.upstream/241upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/network/networkd.c')
-rw-r--r--src/network/networkd.c117
1 files changed, 117 insertions, 0 deletions
diff --git a/src/network/networkd.c b/src/network/networkd.c
new file mode 100644
index 0000000..fcecafe
--- /dev/null
+++ b/src/network/networkd.c
@@ -0,0 +1,117 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include "sd-daemon.h"
+#include "sd-event.h"
+
+#include "capability-util.h"
+#include "daemon-util.h"
+#include "main-func.h"
+#include "mkdir.h"
+#include "networkd-conf.h"
+#include "networkd-manager.h"
+#include "signal-util.h"
+#include "user-util.h"
+
+static int run(int argc, char *argv[]) {
+ _cleanup_(notify_on_cleanup) const char *notify_message = NULL;
+ _cleanup_(manager_freep) Manager *m = NULL;
+ const char *user = "systemd-network";
+ uid_t uid;
+ gid_t gid;
+ int r;
+
+ log_setup_service();
+
+ umask(0022);
+
+ if (argc != 1)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "This program takes no arguments.");
+
+ 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");
+
+ /* 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)
+ 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, 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 = manager_new(&m);
+ if (r < 0)
+ return log_error_errno(r, "Could not create manager: %m");
+
+ r = manager_connect_bus(m);
+ if (r < 0)
+ return log_error_errno(r, "Could not connect to bus: %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_rtnl_enumerate_links(m);
+ if (r < 0)
+ return log_error_errno(r, "Could not enumerate links: %m");
+
+ r = manager_rtnl_enumerate_addresses(m);
+ if (r < 0)
+ return log_error_errno(r, "Could not enumerate addresses: %m");
+
+ r = manager_rtnl_enumerate_routes(m);
+ if (r < 0)
+ return log_error_errno(r, "Could not enumerate routes: %m");
+
+ r = manager_rtnl_enumerate_rules(m);
+ if (r < 0)
+ return log_error_errno(r, "Could not enumerate rules: %m");
+
+ 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);