1834 lines
58 KiB
C
1834 lines
58 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2013 Tom Gundersen <teg@jklm.no>
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***/
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#include <sys/socket.h>
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#include <linux/if.h>
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#include <linux/fib_rules.h>
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#include <stdio_ext.h>
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#include "sd-daemon.h"
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#include "sd-netlink.h"
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#include "alloc-util.h"
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#include "bus-util.h"
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#include "conf-parser.h"
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#include "def.h"
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#include "dns-domain.h"
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#include "fd-util.h"
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#include "fileio.h"
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#include "libudev-private.h"
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#include "local-addresses.h"
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#include "netlink-util.h"
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#include "networkd-manager.h"
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#include "ordered-set.h"
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#include "path-util.h"
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#include "set.h"
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#include "udev-util.h"
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#include "virt.h"
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/* use 8 MB for receive socket kernel queue. */
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#define RCVBUF_SIZE (8*1024*1024)
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const char* const network_dirs[] = {
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"/etc/systemd/network",
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"/run/systemd/network",
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"/usr/lib/systemd/network",
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#if HAVE_SPLIT_USR
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"/lib/systemd/network",
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#endif
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NULL};
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static int setup_default_address_pool(Manager *m) {
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AddressPool *p;
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int r;
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assert(m);
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/* Add in the well-known private address ranges. */
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r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7);
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if (r < 0)
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return r;
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r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
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if (r < 0)
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return r;
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r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
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if (r < 0)
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return r;
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r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
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if (r < 0)
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return r;
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return 0;
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}
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static int manager_reset_all(Manager *m) {
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Link *link;
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Iterator i;
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int r;
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assert(m);
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HASHMAP_FOREACH(link, m->links, i) {
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r = link_carrier_reset(link);
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if (r < 0)
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log_link_warning_errno(link, r, "Could not reset carrier: %m");
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}
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return 0;
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}
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static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
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Manager *m = userdata;
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int b, r;
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assert(message);
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assert(m);
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r = sd_bus_message_read(message, "b", &b);
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if (r < 0) {
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log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
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return 0;
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}
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if (b)
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return 0;
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log_debug("Coming back from suspend, resetting all connections...");
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(void) manager_reset_all(m);
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return 0;
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}
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static int on_connected(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
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Manager *m = userdata;
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assert(message);
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assert(m);
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/* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */
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if (m->dynamic_hostname)
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(void) manager_set_hostname(m, m->dynamic_hostname);
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if (m->dynamic_timezone)
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(void) manager_set_timezone(m, m->dynamic_timezone);
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return 0;
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}
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int manager_connect_bus(Manager *m) {
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int r;
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assert(m);
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if (m->bus)
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return 0;
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r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-network");
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if (r < 0)
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return log_error_errno(r, "Failed to connect to bus: %m");
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r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m);
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if (r < 0)
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return log_error_errno(r, "Failed to add manager object vtable: %m");
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r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m);
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if (r < 0)
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return log_error_errno(r, "Failed to add link object vtable: %m");
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r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m);
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if (r < 0)
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return log_error_errno(r, "Failed to add link enumerator: %m");
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r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m);
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if (r < 0)
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return log_error_errno(r, "Failed to add network object vtable: %m");
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r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m);
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if (r < 0)
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return log_error_errno(r, "Failed to add network enumerator: %m");
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r = bus_request_name_async_may_reload_dbus(m->bus, NULL, "org.freedesktop.network1", 0, NULL);
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if (r < 0)
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return log_error_errno(r, "Failed to request name: %m");
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r = sd_bus_attach_event(m->bus, m->event, 0);
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if (r < 0)
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return log_error_errno(r, "Failed to attach bus to event loop: %m");
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r = sd_bus_match_signal_async(
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m->bus,
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&m->connected_slot,
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"org.freedesktop.DBus.Local",
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NULL,
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"org.freedesktop.DBus.Local",
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"Connected",
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on_connected, NULL, m);
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if (r < 0)
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return log_error_errno(r, "Failed to request match on Connected signal: %m");
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r = sd_bus_match_signal_async(
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m->bus,
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&m->prepare_for_sleep_slot,
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"org.freedesktop.login1",
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"/org/freedesktop/login1",
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"org.freedesktop.login1.Manager",
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"PrepareForSleep",
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match_prepare_for_sleep, NULL, m);
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if (r < 0)
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log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m");
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return 0;
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}
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static int manager_udev_process_link(Manager *m, struct udev_device *device) {
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Link *link = NULL;
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int r, ifindex;
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assert(m);
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assert(device);
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if (!streq_ptr(udev_device_get_action(device), "add"))
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return 0;
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ifindex = udev_device_get_ifindex(device);
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if (ifindex <= 0) {
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log_debug("Ignoring udev ADD event for device with invalid ifindex");
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return 0;
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}
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r = link_get(m, ifindex, &link);
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if (r == -ENODEV)
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return 0;
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else if (r < 0)
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return r;
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r = link_initialized(link, device);
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if (r < 0)
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return r;
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return 0;
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}
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static int manager_dispatch_link_udev(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
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Manager *m = userdata;
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struct udev_monitor *monitor = m->udev_monitor;
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_cleanup_(udev_device_unrefp) struct udev_device *device = NULL;
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device = udev_monitor_receive_device(monitor);
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if (!device)
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return -ENOMEM;
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(void) manager_udev_process_link(m, device);
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return 0;
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}
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static int manager_connect_udev(Manager *m) {
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int r;
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/* udev does not initialize devices inside containers,
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* so we rely on them being already initialized before
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* entering the container */
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if (detect_container() > 0)
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return 0;
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m->udev = udev_new();
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if (!m->udev)
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return -ENOMEM;
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m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
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if (!m->udev_monitor)
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return -ENOMEM;
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r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL);
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if (r < 0)
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return log_error_errno(r, "Could not add udev monitor filter: %m");
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r = udev_monitor_enable_receiving(m->udev_monitor);
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if (r < 0) {
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log_error("Could not enable udev monitor");
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return r;
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}
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r = sd_event_add_io(m->event,
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&m->udev_event_source,
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udev_monitor_get_fd(m->udev_monitor),
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EPOLLIN, manager_dispatch_link_udev,
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m);
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if (r < 0)
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return r;
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r = sd_event_source_set_description(m->udev_event_source, "networkd-udev");
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if (r < 0)
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return r;
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return 0;
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}
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int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
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Manager *m = userdata;
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Link *link = NULL;
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uint16_t type;
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uint32_t ifindex, priority = 0;
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unsigned char protocol, scope, tos, table, rt_type;
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int family;
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unsigned char dst_prefixlen, src_prefixlen;
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union in_addr_union dst = {}, gw = {}, src = {}, prefsrc = {};
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Route *route = NULL;
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int r;
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assert(rtnl);
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assert(message);
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assert(m);
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if (sd_netlink_message_is_error(message)) {
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r = sd_netlink_message_get_errno(message);
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if (r < 0)
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log_warning_errno(r, "rtnl: failed to receive route, ignoring: %m");
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return 0;
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}
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r = sd_netlink_message_get_type(message, &type);
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if (r < 0) {
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log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
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return 0;
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} else if (!IN_SET(type, RTM_NEWROUTE, RTM_DELROUTE)) {
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log_warning("rtnl: received unexpected message type when processing route, ignoring");
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return 0;
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}
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r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex);
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if (r == -ENODATA) {
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log_debug("rtnl: received route without ifindex, ignoring");
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return 0;
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} else if (r < 0) {
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log_warning_errno(r, "rtnl: could not get ifindex from route, ignoring: %m");
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return 0;
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} else if (ifindex <= 0) {
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log_warning("rtnl: received route message with invalid ifindex, ignoring: %d", ifindex);
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return 0;
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} else {
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r = link_get(m, ifindex, &link);
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if (r < 0 || !link) {
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/* when enumerating we might be out of sync, but we will
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* get the route again, so just ignore it */
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if (!m->enumerating)
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log_warning("rtnl: received route for nonexistent link (%d), ignoring", ifindex);
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return 0;
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}
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}
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r = sd_rtnl_message_route_get_family(message, &family);
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if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
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log_link_warning(link, "rtnl: received address with invalid family, ignoring");
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return 0;
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}
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r = sd_rtnl_message_route_get_protocol(message, &protocol);
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if (r < 0) {
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log_warning_errno(r, "rtnl: could not get route protocol: %m");
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return 0;
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}
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switch (family) {
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case AF_INET:
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r = sd_netlink_message_read_in_addr(message, RTA_DST, &dst.in);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
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return 0;
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}
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r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &gw.in);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
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return 0;
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}
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r = sd_netlink_message_read_in_addr(message, RTA_SRC, &src.in);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
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return 0;
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}
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r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &prefsrc.in);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
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return 0;
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}
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break;
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case AF_INET6:
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r = sd_netlink_message_read_in6_addr(message, RTA_DST, &dst.in6);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
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return 0;
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}
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r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &gw.in6);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
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return 0;
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}
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r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &src.in6);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
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return 0;
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}
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r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &prefsrc.in6);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
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return 0;
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}
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break;
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default:
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assert_not_reached("Received unsupported address family");
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return 0;
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}
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r = sd_rtnl_message_route_get_dst_prefixlen(message, &dst_prefixlen);
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if (r < 0) {
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log_link_warning_errno(link, r, "rtnl: received route with invalid destination prefixlen, ignoring: %m");
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return 0;
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}
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r = sd_rtnl_message_route_get_src_prefixlen(message, &src_prefixlen);
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if (r < 0) {
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log_link_warning_errno(link, r, "rtnl: received route with invalid source prefixlen, ignoring: %m");
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return 0;
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}
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r = sd_rtnl_message_route_get_scope(message, &scope);
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if (r < 0) {
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log_link_warning_errno(link, r, "rtnl: received route with invalid scope, ignoring: %m");
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return 0;
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}
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r = sd_rtnl_message_route_get_tos(message, &tos);
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if (r < 0) {
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log_link_warning_errno(link, r, "rtnl: received route with invalid tos, ignoring: %m");
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return 0;
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}
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r = sd_rtnl_message_route_get_type(message, &rt_type);
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if (r < 0) {
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log_link_warning_errno(link, r, "rtnl: received route with invalid type, ignoring: %m");
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return 0;
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}
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r = sd_rtnl_message_route_get_table(message, &table);
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if (r < 0) {
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log_link_warning_errno(link, r, "rtnl: received route with invalid table, ignoring: %m");
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return 0;
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}
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r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &priority);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route with invalid priority, ignoring: %m");
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return 0;
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}
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(void) route_get(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
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switch (type) {
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case RTM_NEWROUTE:
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if (!route) {
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/* A route appeared that we did not request */
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r = route_add_foreign(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to add route, ignoring: %m");
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return 0;
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}
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}
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route_update(route, &src, src_prefixlen, &gw, &prefsrc, scope, protocol, rt_type);
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break;
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case RTM_DELROUTE:
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route_free(route);
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break;
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default:
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assert_not_reached("Received invalid RTNL message type");
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}
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return 1;
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}
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int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
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Manager *m = userdata;
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Link *link = NULL;
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uint16_t type;
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unsigned char flags;
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int family;
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unsigned char prefixlen;
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unsigned char scope;
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union in_addr_union in_addr;
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struct ifa_cacheinfo cinfo;
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Address *address = NULL;
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char buf[INET6_ADDRSTRLEN], valid_buf[FORMAT_TIMESPAN_MAX];
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const char *valid_str = NULL;
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int r, ifindex;
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assert(rtnl);
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assert(message);
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assert(m);
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if (sd_netlink_message_is_error(message)) {
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r = sd_netlink_message_get_errno(message);
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if (r < 0)
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log_warning_errno(r, "rtnl: failed to receive address, ignoring: %m");
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return 0;
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}
|
|
|
|
r = sd_netlink_message_get_type(message, &type);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
|
|
return 0;
|
|
} else if (!IN_SET(type, RTM_NEWADDR, RTM_DELADDR)) {
|
|
log_warning("rtnl: received unexpected message type when processing address, ignoring");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: could not get ifindex from address, ignoring: %m");
|
|
return 0;
|
|
} else if (ifindex <= 0) {
|
|
log_warning("rtnl: received address message with invalid ifindex, ignoring: %d", ifindex);
|
|
return 0;
|
|
} else {
|
|
r = link_get(m, ifindex, &link);
|
|
if (r < 0 || !link) {
|
|
/* when enumerating we might be out of sync, but we will
|
|
* get the address again, so just ignore it */
|
|
if (!m->enumerating)
|
|
log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
r = sd_rtnl_message_addr_get_family(message, &family);
|
|
if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
|
|
log_link_warning(link, "rtnl: received address with invalid family, ignoring");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen);
|
|
if (r < 0) {
|
|
log_link_warning_errno(link, r, "rtnl: received address with invalid prefixlen, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_rtnl_message_addr_get_scope(message, &scope);
|
|
if (r < 0) {
|
|
log_link_warning_errno(link, r, "rtnl: received address with invalid scope, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_rtnl_message_addr_get_flags(message, &flags);
|
|
if (r < 0) {
|
|
log_link_warning_errno(link, r, "rtnl: received address with invalid flags, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
switch (family) {
|
|
case AF_INET:
|
|
r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in);
|
|
if (r < 0) {
|
|
log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
break;
|
|
|
|
case AF_INET6:
|
|
r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6);
|
|
if (r < 0) {
|
|
log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
assert_not_reached("Received unsupported address family");
|
|
}
|
|
|
|
if (!inet_ntop(family, &in_addr, buf, INET6_ADDRSTRLEN)) {
|
|
log_link_warning(link, "Could not print address, ignoring");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_link_warning_errno(link, r, "rtnl: cannot get IFA_CACHEINFO attribute, ignoring: %m");
|
|
return 0;
|
|
} else if (r >= 0) {
|
|
if (cinfo.ifa_valid != CACHE_INFO_INFINITY_LIFE_TIME)
|
|
valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX,
|
|
cinfo.ifa_valid * USEC_PER_SEC,
|
|
USEC_PER_SEC);
|
|
}
|
|
|
|
(void) address_get(link, family, &in_addr, prefixlen, &address);
|
|
|
|
switch (type) {
|
|
case RTM_NEWADDR:
|
|
if (address)
|
|
log_link_debug(link, "Updating address: %s/%u (valid %s%s)", buf, prefixlen,
|
|
valid_str ? "for " : "forever", strempty(valid_str));
|
|
else {
|
|
/* An address appeared that we did not request */
|
|
r = address_add_foreign(link, family, &in_addr, prefixlen, &address);
|
|
if (r < 0) {
|
|
log_link_warning_errno(link, r, "Failed to add address %s/%u, ignoring: %m", buf, prefixlen);
|
|
return 0;
|
|
} else
|
|
log_link_debug(link, "Adding address: %s/%u (valid %s%s)", buf, prefixlen,
|
|
valid_str ? "for " : "forever", strempty(valid_str));
|
|
}
|
|
|
|
r = address_update(address, flags, scope, &cinfo);
|
|
if (r < 0) {
|
|
log_link_warning_errno(link, r, "Failed to update address %s/%u, ignoring: %m", buf, prefixlen);
|
|
return 0;
|
|
}
|
|
|
|
break;
|
|
|
|
case RTM_DELADDR:
|
|
|
|
if (address) {
|
|
log_link_debug(link, "Removing address: %s/%u (valid %s%s)", buf, prefixlen,
|
|
valid_str ? "for " : "forever", strempty(valid_str));
|
|
(void) address_drop(address);
|
|
} else
|
|
log_link_warning(link, "Removing non-existent address: %s/%u (valid %s%s), ignoring", buf, prefixlen,
|
|
valid_str ? "for " : "forever", strempty(valid_str));
|
|
|
|
break;
|
|
default:
|
|
assert_not_reached("Received invalid RTNL message type");
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
|
|
Manager *m = userdata;
|
|
Link *link = NULL;
|
|
NetDev *netdev = NULL;
|
|
uint16_t type;
|
|
const char *name;
|
|
int r, ifindex;
|
|
|
|
assert(rtnl);
|
|
assert(message);
|
|
assert(m);
|
|
|
|
if (sd_netlink_message_is_error(message)) {
|
|
r = sd_netlink_message_get_errno(message);
|
|
if (r < 0)
|
|
log_warning_errno(r, "rtnl: Could not receive link, ignoring: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_get_type(message, &type);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
|
|
return 0;
|
|
} else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
|
|
log_warning("rtnl: Received unexpected message type when processing link, ignoring");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: Could not get ifindex from link, ignoring: %m");
|
|
return 0;
|
|
} else if (ifindex <= 0) {
|
|
log_warning("rtnl: received link message with invalid ifindex %d, ignoring", ifindex);
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
(void) link_get(m, ifindex, &link);
|
|
(void) netdev_get(m, name, &netdev);
|
|
|
|
switch (type) {
|
|
case RTM_NEWLINK:
|
|
if (!link) {
|
|
/* link is new, so add it */
|
|
r = link_add(m, message, &link);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Could not add new link, ignoring: %m");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (netdev) {
|
|
/* netdev exists, so make sure the ifindex matches */
|
|
r = netdev_set_ifindex(netdev, message);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Could not set ifindex on netdev, ignoring: %m");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
r = link_update(link, message);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Could not update link, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
break;
|
|
|
|
case RTM_DELLINK:
|
|
link_drop(link);
|
|
netdev_drop(netdev);
|
|
|
|
break;
|
|
|
|
default:
|
|
assert_not_reached("Received invalid RTNL message type.");
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int manager_rtnl_process_rule(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
|
|
uint8_t tos = 0, to_prefixlen = 0, from_prefixlen = 0;
|
|
union in_addr_union to = {}, from = {};
|
|
RoutingPolicyRule *rule = NULL;
|
|
uint32_t fwmark = 0, table = 0;
|
|
char *iif = NULL, *oif = NULL;
|
|
Manager *m = userdata;
|
|
uint16_t type;
|
|
int family;
|
|
int r;
|
|
|
|
assert(rtnl);
|
|
assert(message);
|
|
assert(m);
|
|
|
|
if (sd_netlink_message_is_error(message)) {
|
|
r = sd_netlink_message_get_errno(message);
|
|
if (r < 0)
|
|
log_warning_errno(r, "rtnl: failed to receive rule, ignoring: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_get_type(message, &type);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
|
|
return 0;
|
|
} else if (!IN_SET(type, RTM_NEWRULE, RTM_DELRULE)) {
|
|
log_warning("rtnl: received unexpected message type '%u' when processing rule, ignoring", type);
|
|
return 0;
|
|
}
|
|
|
|
r = sd_rtnl_message_get_family(message, &family);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: could not get rule family, ignoring: %m");
|
|
return 0;
|
|
} else if (!IN_SET(family, AF_INET, AF_INET6)) {
|
|
log_debug("rtnl: received address with invalid family %u, ignoring", family);
|
|
return 0;
|
|
}
|
|
|
|
switch (family) {
|
|
case AF_INET:
|
|
r = sd_netlink_message_read_in_addr(message, FRA_SRC, &from.in);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
|
|
return 0;
|
|
} else if (r >= 0) {
|
|
r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &from_prefixlen);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: failed to retrive rule from prefix length, ignoring: %m");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
r = sd_netlink_message_read_in_addr(message, FRA_DST, &to.in);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
|
|
return 0;
|
|
} else if (r >= 0) {
|
|
r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &to_prefixlen);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: failed to retrive rule to prefix length, ignoring: %m");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case AF_INET6:
|
|
r = sd_netlink_message_read_in6_addr(message, FRA_SRC, &from.in6);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
|
|
return 0;
|
|
} else if (r >= 0) {
|
|
r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &from_prefixlen);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: failed to retrive rule from prefix length, ignoring: %m");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
r = sd_netlink_message_read_in6_addr(message, FRA_DST, &to.in6);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
|
|
return 0;
|
|
} else if (r >= 0) {
|
|
r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &to_prefixlen);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: failed to retrive rule to prefix length, ignoring: %m");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
assert_not_reached("Received unsupported address family");
|
|
}
|
|
|
|
if (from_prefixlen == 0 && to_prefixlen == 0)
|
|
return 0;
|
|
|
|
r = sd_netlink_message_read_u32(message, FRA_FWMARK, &fwmark);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_FWMARK attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read_u32(message, FRA_TABLE, &table);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_TABLE attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_rtnl_message_routing_policy_rule_get_tos(message, &tos);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get ip rule TOS, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read_string(message, FRA_IIFNAME, (const char **) &iif);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_IIFNAME attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read_string(message, FRA_OIFNAME, (const char **) &oif);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_OIFNAME attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
(void) routing_policy_rule_get(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, iif, oif, &rule);
|
|
|
|
switch (type) {
|
|
case RTM_NEWRULE:
|
|
if (!rule) {
|
|
r = routing_policy_rule_add_foreign(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, iif, oif, &rule);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Could not add rule, ignoring: %m");
|
|
return 0;
|
|
}
|
|
}
|
|
break;
|
|
case RTM_DELRULE:
|
|
routing_policy_rule_free(rule);
|
|
|
|
break;
|
|
|
|
default:
|
|
assert_not_reached("Received invalid RTNL message type");
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int systemd_netlink_fd(void) {
|
|
int n, fd, rtnl_fd = -EINVAL;
|
|
|
|
n = sd_listen_fds(true);
|
|
if (n <= 0)
|
|
return -EINVAL;
|
|
|
|
for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
|
|
if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
|
|
if (rtnl_fd >= 0)
|
|
return -EINVAL;
|
|
|
|
rtnl_fd = fd;
|
|
}
|
|
}
|
|
|
|
return rtnl_fd;
|
|
}
|
|
|
|
static int manager_connect_genl(Manager *m) {
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
r = sd_genl_socket_open(&m->genl);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_inc_rcvbuf(m->genl, RCVBUF_SIZE);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_attach_event(m->genl, m->event, 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int manager_connect_rtnl(Manager *m) {
|
|
int fd, r;
|
|
|
|
assert(m);
|
|
|
|
fd = systemd_netlink_fd();
|
|
if (fd < 0)
|
|
r = sd_netlink_open(&m->rtnl);
|
|
else
|
|
r = sd_netlink_open_fd(&m->rtnl, fd);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_attach_event(m->rtnl, m->event, 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_add_match(m->rtnl, RTM_NEWLINK, &manager_rtnl_process_link, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_add_match(m->rtnl, RTM_DELLINK, &manager_rtnl_process_link, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_add_match(m->rtnl, RTM_NEWADDR, &manager_rtnl_process_address, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_add_match(m->rtnl, RTM_DELADDR, &manager_rtnl_process_address, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_add_match(m->rtnl, RTM_NEWROUTE, &manager_rtnl_process_route, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_add_match(m->rtnl, RTM_DELROUTE, &manager_rtnl_process_route, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_add_match(m->rtnl, RTM_NEWRULE, &manager_rtnl_process_rule, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_add_match(m->rtnl, RTM_DELRULE, &manager_rtnl_process_rule, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ordered_set_put_in_addr_data(OrderedSet *s, const struct in_addr_data *address) {
|
|
char *p;
|
|
int r;
|
|
|
|
assert(s);
|
|
assert(address);
|
|
|
|
r = in_addr_to_string(address->family, &address->address, &p);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = ordered_set_consume(s, p);
|
|
if (r == -EEXIST)
|
|
return 0;
|
|
|
|
return r;
|
|
}
|
|
|
|
static int ordered_set_put_in_addr_datav(OrderedSet *s, const struct in_addr_data *addresses, unsigned n) {
|
|
int r, c = 0;
|
|
unsigned i;
|
|
|
|
assert(s);
|
|
assert(addresses || n == 0);
|
|
|
|
for (i = 0; i < n; i++) {
|
|
r = ordered_set_put_in_addr_data(s, addresses+i);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
c += r;
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
static int ordered_set_put_in4_addr(OrderedSet *s, const struct in_addr *address) {
|
|
char *p;
|
|
int r;
|
|
|
|
assert(s);
|
|
assert(address);
|
|
|
|
r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = ordered_set_consume(s, p);
|
|
if (r == -EEXIST)
|
|
return 0;
|
|
|
|
return r;
|
|
}
|
|
|
|
static int ordered_set_put_in4_addrv(OrderedSet *s, const struct in_addr *addresses, unsigned n) {
|
|
int r, c = 0;
|
|
unsigned i;
|
|
|
|
assert(s);
|
|
assert(n == 0 || addresses);
|
|
|
|
for (i = 0; i < n; i++) {
|
|
r = ordered_set_put_in4_addr(s, addresses+i);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
c += r;
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
static void print_string_set(FILE *f, const char *field, OrderedSet *s) {
|
|
bool space = false;
|
|
Iterator i;
|
|
char *p;
|
|
|
|
if (ordered_set_isempty(s))
|
|
return;
|
|
|
|
fputs(field, f);
|
|
|
|
ORDERED_SET_FOREACH(p, s, i)
|
|
fputs_with_space(f, p, NULL, &space);
|
|
|
|
fputc('\n', f);
|
|
}
|
|
|
|
static int manager_save(Manager *m) {
|
|
_cleanup_ordered_set_free_free_ OrderedSet *dns = NULL, *ntp = NULL, *search_domains = NULL, *route_domains = NULL;
|
|
Link *link;
|
|
Iterator i;
|
|
_cleanup_free_ char *temp_path = NULL;
|
|
_cleanup_fclose_ FILE *f = NULL;
|
|
LinkOperationalState operstate = LINK_OPERSTATE_OFF;
|
|
const char *operstate_str;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(m->state_file);
|
|
|
|
/* We add all NTP and DNS server to a set, to filter out duplicates */
|
|
dns = ordered_set_new(&string_hash_ops);
|
|
if (!dns)
|
|
return -ENOMEM;
|
|
|
|
ntp = ordered_set_new(&string_hash_ops);
|
|
if (!ntp)
|
|
return -ENOMEM;
|
|
|
|
search_domains = ordered_set_new(&dns_name_hash_ops);
|
|
if (!search_domains)
|
|
return -ENOMEM;
|
|
|
|
route_domains = ordered_set_new(&dns_name_hash_ops);
|
|
if (!route_domains)
|
|
return -ENOMEM;
|
|
|
|
HASHMAP_FOREACH(link, m->links, i) {
|
|
if (link->flags & IFF_LOOPBACK)
|
|
continue;
|
|
|
|
if (link->operstate > operstate)
|
|
operstate = link->operstate;
|
|
|
|
if (!link->network)
|
|
continue;
|
|
|
|
/* First add the static configured entries */
|
|
r = ordered_set_put_in_addr_datav(dns, link->network->dns, link->network->n_dns);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = ordered_set_put_strdupv(ntp, link->network->ntp);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = ordered_set_put_strdupv(search_domains, link->network->search_domains);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = ordered_set_put_strdupv(route_domains, link->network->route_domains);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (!link->dhcp_lease)
|
|
continue;
|
|
|
|
/* Secondly, add the entries acquired via DHCP */
|
|
if (link->network->dhcp_use_dns) {
|
|
const struct in_addr *addresses;
|
|
|
|
r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
|
|
if (r > 0) {
|
|
r = ordered_set_put_in4_addrv(dns, addresses, r);
|
|
if (r < 0)
|
|
return r;
|
|
} else if (r < 0 && r != -ENODATA)
|
|
return r;
|
|
}
|
|
|
|
if (link->network->dhcp_use_ntp) {
|
|
const struct in_addr *addresses;
|
|
|
|
r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
|
|
if (r > 0) {
|
|
r = ordered_set_put_in4_addrv(ntp, addresses, r);
|
|
if (r < 0)
|
|
return r;
|
|
} else if (r < 0 && r != -ENODATA)
|
|
return r;
|
|
}
|
|
|
|
if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
|
|
const char *domainname;
|
|
char **domains = NULL;
|
|
|
|
OrderedSet *target_domains = (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) ? search_domains : route_domains;
|
|
r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
|
|
if (r >= 0) {
|
|
r = ordered_set_put_strdup(target_domains, domainname);
|
|
if (r < 0)
|
|
return r;
|
|
} else if (r != -ENODATA)
|
|
return r;
|
|
|
|
r = sd_dhcp_lease_get_search_domains(link->dhcp_lease, &domains);
|
|
if (r >= 0) {
|
|
r = ordered_set_put_strdupv(target_domains, domains);
|
|
if (r < 0)
|
|
return r;
|
|
} else if (r != -ENODATA)
|
|
return r;
|
|
}
|
|
}
|
|
|
|
operstate_str = link_operstate_to_string(operstate);
|
|
assert(operstate_str);
|
|
|
|
r = fopen_temporary(m->state_file, &f, &temp_path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
(void) __fsetlocking(f, FSETLOCKING_BYCALLER);
|
|
(void) fchmod(fileno(f), 0644);
|
|
|
|
fprintf(f,
|
|
"# This is private data. Do not parse.\n"
|
|
"OPER_STATE=%s\n", operstate_str);
|
|
|
|
print_string_set(f, "DNS=", dns);
|
|
print_string_set(f, "NTP=", ntp);
|
|
print_string_set(f, "DOMAINS=", search_domains);
|
|
print_string_set(f, "ROUTE_DOMAINS=", route_domains);
|
|
|
|
r = routing_policy_serialize_rules(m->rules, f);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
r = fflush_and_check(f);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
if (rename(temp_path, m->state_file) < 0) {
|
|
r = -errno;
|
|
goto fail;
|
|
}
|
|
|
|
if (m->operational_state != operstate) {
|
|
m->operational_state = operstate;
|
|
r = manager_send_changed(m, "OperationalState", NULL);
|
|
if (r < 0)
|
|
log_error_errno(r, "Could not emit changed OperationalState: %m");
|
|
}
|
|
|
|
m->dirty = false;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
(void) unlink(m->state_file);
|
|
(void) unlink(temp_path);
|
|
|
|
return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
|
|
}
|
|
|
|
static int manager_dirty_handler(sd_event_source *s, void *userdata) {
|
|
Manager *m = userdata;
|
|
Link *link;
|
|
Iterator i;
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
if (m->dirty)
|
|
manager_save(m);
|
|
|
|
SET_FOREACH(link, m->dirty_links, i) {
|
|
r = link_save(link);
|
|
if (r >= 0)
|
|
link_clean(link);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
Link *manager_dhcp6_prefix_get(Manager *m, struct in6_addr *addr) {
|
|
assert_return(m, NULL);
|
|
assert_return(m->dhcp6_prefixes, NULL);
|
|
assert_return(addr, NULL);
|
|
|
|
return hashmap_get(m->dhcp6_prefixes, addr);
|
|
}
|
|
|
|
static int dhcp6_route_add_callback(sd_netlink *nl, sd_netlink_message *m,
|
|
void *userdata) {
|
|
Link *l = userdata;
|
|
int r;
|
|
union in_addr_union prefix;
|
|
_cleanup_free_ char *buf = NULL;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r != 0) {
|
|
log_link_debug_errno(l, r, "Received error adding DHCPv6 Prefix Delegation route: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read_in6_addr(m, RTA_DST, &prefix.in6);
|
|
if (r < 0) {
|
|
log_link_debug_errno(l, r, "Could not read IPv6 address from DHCPv6 Prefix Delegation while adding route: %m");
|
|
return 0;
|
|
}
|
|
|
|
(void) in_addr_to_string(AF_INET6, &prefix, &buf);
|
|
log_link_debug(l, "Added DHCPv6 Prefix Deleagtion route %s/64",
|
|
strnull(buf));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int manager_dhcp6_prefix_add(Manager *m, struct in6_addr *addr, Link *link) {
|
|
int r;
|
|
Route *route;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->dhcp6_prefixes, -ENODATA);
|
|
assert_return(addr, -EINVAL);
|
|
|
|
r = route_add(link, AF_INET6, (union in_addr_union *) addr, 64,
|
|
0, 0, 0, &route);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = route_configure(route, link, dhcp6_route_add_callback);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return hashmap_put(m->dhcp6_prefixes, addr, link);
|
|
}
|
|
|
|
static int dhcp6_route_remove_callback(sd_netlink *nl, sd_netlink_message *m,
|
|
void *userdata) {
|
|
Link *l = userdata;
|
|
int r;
|
|
union in_addr_union prefix;
|
|
_cleanup_free_ char *buf = NULL;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r != 0) {
|
|
log_link_debug_errno(l, r, "Received error on DHCPv6 Prefix Delegation route removal: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read_in6_addr(m, RTA_DST, &prefix.in6);
|
|
if (r < 0) {
|
|
log_link_debug_errno(l, r, "Could not read IPv6 address from DHCPv6 Prefix Delegation while removing route: %m");
|
|
return 0;
|
|
}
|
|
|
|
(void) in_addr_to_string(AF_INET6, &prefix, &buf);
|
|
log_link_debug(l, "Removed DHCPv6 Prefix Delegation route %s/64",
|
|
strnull(buf));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int manager_dhcp6_prefix_remove(Manager *m, struct in6_addr *addr) {
|
|
Link *l;
|
|
int r;
|
|
Route *route;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->dhcp6_prefixes, -ENODATA);
|
|
assert_return(addr, -EINVAL);
|
|
|
|
l = hashmap_remove(m->dhcp6_prefixes, addr);
|
|
if (!l)
|
|
return -EINVAL;
|
|
|
|
(void) sd_radv_remove_prefix(l->radv, addr, 64);
|
|
r = route_get(l, AF_INET6, (union in_addr_union *) addr, 64,
|
|
0, 0, 0, &route);
|
|
if (r >= 0)
|
|
(void) route_remove(route, l, dhcp6_route_remove_callback);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int manager_dhcp6_prefix_remove_all(Manager *m, Link *link) {
|
|
Iterator i;
|
|
Link *l;
|
|
struct in6_addr *addr;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(link, -EINVAL);
|
|
|
|
HASHMAP_FOREACH_KEY(l, addr, m->dhcp6_prefixes, i) {
|
|
if (l != link)
|
|
continue;
|
|
|
|
(void) manager_dhcp6_prefix_remove(m, addr);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dhcp6_prefixes_hash_func(const void *p, struct siphash *state) {
|
|
const struct in6_addr *addr = p;
|
|
|
|
assert(p);
|
|
|
|
siphash24_compress(addr, sizeof(*addr), state);
|
|
}
|
|
|
|
static int dhcp6_prefixes_compare_func(const void *_a, const void *_b) {
|
|
const struct in6_addr *a = _a, *b = _b;
|
|
|
|
return memcmp(a, b, sizeof(*a));
|
|
}
|
|
|
|
static const struct hash_ops dhcp6_prefixes_hash_ops = {
|
|
.hash = dhcp6_prefixes_hash_func,
|
|
.compare = dhcp6_prefixes_compare_func,
|
|
};
|
|
|
|
int manager_new(Manager **ret, sd_event *event) {
|
|
_cleanup_(manager_freep) Manager *m = NULL;
|
|
int r;
|
|
|
|
m = new0(Manager, 1);
|
|
if (!m)
|
|
return -ENOMEM;
|
|
|
|
m->state_file = strdup("/run/systemd/netif/state");
|
|
if (!m->state_file)
|
|
return -ENOMEM;
|
|
|
|
m->event = sd_event_ref(event);
|
|
|
|
r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = manager_connect_rtnl(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = manager_connect_genl(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = manager_connect_udev(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
m->netdevs = hashmap_new(&string_hash_ops);
|
|
if (!m->netdevs)
|
|
return -ENOMEM;
|
|
|
|
LIST_HEAD_INIT(m->networks);
|
|
|
|
r = sd_resolve_default(&m->resolve);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_resolve_attach_event(m->resolve, m->event, 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = setup_default_address_pool(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
m->dhcp6_prefixes = hashmap_new(&dhcp6_prefixes_hash_ops);
|
|
if (!m->dhcp6_prefixes)
|
|
return -ENOMEM;
|
|
|
|
m->duid.type = DUID_TYPE_EN;
|
|
|
|
(void) routing_policy_load_rules(m->state_file, &m->rules_saved);
|
|
|
|
*ret = TAKE_PTR(m);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void manager_free(Manager *m) {
|
|
Network *network;
|
|
NetDev *netdev;
|
|
Link *link;
|
|
AddressPool *pool;
|
|
|
|
if (!m)
|
|
return;
|
|
|
|
free(m->state_file);
|
|
|
|
while ((network = m->networks))
|
|
network_free(network);
|
|
|
|
while ((link = hashmap_first(m->dhcp6_prefixes)))
|
|
link_unref(link);
|
|
hashmap_free(m->dhcp6_prefixes);
|
|
|
|
while ((link = hashmap_first(m->links)))
|
|
link_unref(link);
|
|
hashmap_free(m->links);
|
|
|
|
hashmap_free(m->networks_by_name);
|
|
|
|
while ((netdev = hashmap_first(m->netdevs)))
|
|
netdev_unref(netdev);
|
|
hashmap_free(m->netdevs);
|
|
|
|
while ((pool = m->address_pools))
|
|
address_pool_free(pool);
|
|
|
|
set_free(m->rules);
|
|
set_free(m->rules_foreign);
|
|
|
|
set_free_with_destructor(m->rules_saved, routing_policy_rule_free);
|
|
|
|
sd_netlink_unref(m->rtnl);
|
|
sd_event_unref(m->event);
|
|
|
|
sd_resolve_unref(m->resolve);
|
|
|
|
sd_event_source_unref(m->udev_event_source);
|
|
udev_monitor_unref(m->udev_monitor);
|
|
udev_unref(m->udev);
|
|
|
|
sd_bus_unref(m->bus);
|
|
sd_bus_slot_unref(m->prepare_for_sleep_slot);
|
|
sd_bus_slot_unref(m->connected_slot);
|
|
|
|
free(m->dynamic_timezone);
|
|
free(m->dynamic_hostname);
|
|
|
|
free(m);
|
|
}
|
|
|
|
int manager_start(Manager *m) {
|
|
Link *link;
|
|
Iterator i;
|
|
|
|
assert(m);
|
|
|
|
/* The dirty handler will deal with future serialization, but the first one
|
|
must be done explicitly. */
|
|
|
|
manager_save(m);
|
|
|
|
HASHMAP_FOREACH(link, m->links, i)
|
|
link_save(link);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int manager_load_config(Manager *m) {
|
|
int r;
|
|
|
|
/* update timestamp */
|
|
paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, true);
|
|
|
|
r = netdev_load(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = network_load(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool manager_should_reload(Manager *m) {
|
|
return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false);
|
|
}
|
|
|
|
int manager_rtnl_enumerate_links(Manager *m) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
|
|
sd_netlink_message *link;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(m->rtnl);
|
|
|
|
r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_message_request_dump(req, true);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_call(m->rtnl, req, 0, &reply);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
for (link = reply; link; link = sd_netlink_message_next(link)) {
|
|
int k;
|
|
|
|
m->enumerating = true;
|
|
|
|
k = manager_rtnl_process_link(m->rtnl, link, m);
|
|
if (k < 0)
|
|
r = k;
|
|
|
|
m->enumerating = false;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int manager_rtnl_enumerate_addresses(Manager *m) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
|
|
sd_netlink_message *addr;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(m->rtnl);
|
|
|
|
r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_message_request_dump(req, true);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_call(m->rtnl, req, 0, &reply);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
|
|
int k;
|
|
|
|
m->enumerating = true;
|
|
|
|
k = manager_rtnl_process_address(m->rtnl, addr, m);
|
|
if (k < 0)
|
|
r = k;
|
|
|
|
m->enumerating = false;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int manager_rtnl_enumerate_routes(Manager *m) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
|
|
sd_netlink_message *route;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(m->rtnl);
|
|
|
|
r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_message_request_dump(req, true);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_call(m->rtnl, req, 0, &reply);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
for (route = reply; route; route = sd_netlink_message_next(route)) {
|
|
int k;
|
|
|
|
m->enumerating = true;
|
|
|
|
k = manager_rtnl_process_route(m->rtnl, route, m);
|
|
if (k < 0)
|
|
r = k;
|
|
|
|
m->enumerating = false;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int manager_rtnl_enumerate_rules(Manager *m) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
|
|
sd_netlink_message *rule;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(m->rtnl);
|
|
|
|
r = sd_rtnl_message_new_routing_policy_rule(m->rtnl, &req, RTM_GETRULE, 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_message_request_dump(req, true);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_call(m->rtnl, req, 0, &reply);
|
|
if (r < 0) {
|
|
if (r == -EOPNOTSUPP) {
|
|
log_debug("FIB Rules are not supported by the kernel. Ignoring.");
|
|
return 0;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
for (rule = reply; rule; rule = sd_netlink_message_next(rule)) {
|
|
int k;
|
|
|
|
m->enumerating = true;
|
|
|
|
k = manager_rtnl_process_rule(m->rtnl, rule, m);
|
|
if (k < 0)
|
|
r = k;
|
|
|
|
m->enumerating = false;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
|
|
AddressPool *p;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(prefixlen > 0);
|
|
assert(found);
|
|
|
|
LIST_FOREACH(address_pools, p, m->address_pools) {
|
|
if (p->family != family)
|
|
continue;
|
|
|
|
r = address_pool_acquire(p, prefixlen, found);
|
|
if (r != 0)
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
Link* manager_find_uplink(Manager *m, Link *exclude) {
|
|
_cleanup_free_ struct local_address *gateways = NULL;
|
|
int n, i;
|
|
|
|
assert(m);
|
|
|
|
/* Looks for a suitable "uplink", via black magic: an
|
|
* interface that is up and where the default route with the
|
|
* highest priority points to. */
|
|
|
|
n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways);
|
|
if (n < 0) {
|
|
log_warning_errno(n, "Failed to determine list of default gateways: %m");
|
|
return NULL;
|
|
}
|
|
|
|
for (i = 0; i < n; i++) {
|
|
Link *link;
|
|
|
|
link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex));
|
|
if (!link) {
|
|
log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
|
|
continue;
|
|
}
|
|
|
|
if (link == exclude)
|
|
continue;
|
|
|
|
if (link->operstate < LINK_OPERSTATE_ROUTABLE)
|
|
continue;
|
|
|
|
return link;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void manager_dirty(Manager *manager) {
|
|
assert(manager);
|
|
|
|
/* the serialized state in /run is no longer up-to-date */
|
|
manager->dirty = true;
|
|
}
|
|
|
|
static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
|
|
Manager *manager = userdata;
|
|
const sd_bus_error *e;
|
|
|
|
assert(m);
|
|
assert(manager);
|
|
|
|
e = sd_bus_message_get_error(m);
|
|
if (e)
|
|
log_warning_errno(sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
|
|
|
|
return 1;
|
|
}
|
|
|
|
int manager_set_hostname(Manager *m, const char *hostname) {
|
|
int r;
|
|
|
|
log_debug("Setting transient hostname: '%s'", strna(hostname));
|
|
|
|
if (free_and_strdup(&m->dynamic_hostname, hostname) < 0)
|
|
return log_oom();
|
|
|
|
if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
|
|
log_info("Not connected to system bus, not setting hostname.");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_bus_call_method_async(
|
|
m->bus,
|
|
NULL,
|
|
"org.freedesktop.hostname1",
|
|
"/org/freedesktop/hostname1",
|
|
"org.freedesktop.hostname1",
|
|
"SetHostname",
|
|
set_hostname_handler,
|
|
m,
|
|
"sb",
|
|
hostname,
|
|
false);
|
|
|
|
if (r < 0)
|
|
return log_error_errno(r, "Could not set transient hostname: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
|
|
Manager *manager = userdata;
|
|
const sd_bus_error *e;
|
|
|
|
assert(m);
|
|
assert(manager);
|
|
|
|
e = sd_bus_message_get_error(m);
|
|
if (e)
|
|
log_warning_errno(sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
|
|
|
|
return 1;
|
|
}
|
|
|
|
int manager_set_timezone(Manager *m, const char *tz) {
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(tz);
|
|
|
|
log_debug("Setting system timezone: '%s'", tz);
|
|
if (free_and_strdup(&m->dynamic_timezone, tz) < 0)
|
|
return log_oom();
|
|
|
|
if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
|
|
log_info("Not connected to system bus, not setting timezone.");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_bus_call_method_async(
|
|
m->bus,
|
|
NULL,
|
|
"org.freedesktop.timedate1",
|
|
"/org/freedesktop/timedate1",
|
|
"org.freedesktop.timedate1",
|
|
"SetTimezone",
|
|
set_timezone_handler,
|
|
m,
|
|
"sb",
|
|
tz,
|
|
false);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Could not set timezone: %m");
|
|
|
|
return 0;
|
|
}
|