summaryrefslogtreecommitdiff
path: root/src/grp-network/libnetworkd-core/networkd-manager.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/grp-network/libnetworkd-core/networkd-manager.c')
-rw-r--r--src/grp-network/libnetworkd-core/networkd-manager.c1331
1 files changed, 1331 insertions, 0 deletions
diff --git a/src/grp-network/libnetworkd-core/networkd-manager.c b/src/grp-network/libnetworkd-core/networkd-manager.c
new file mode 100644
index 0000000000..d7d149ebb5
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-manager.c
@@ -0,0 +1,1331 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+ ***/
+
+#include <sys/socket.h>
+
+#include <linux/if.h>
+
+#include <systemd/sd-daemon.h>
+
+#include "libudev-private.h"
+#include "sd-bus/bus-util.h"
+#include "sd-netlink/local-addresses.h"
+#include "sd-netlink/netlink-util.h"
+#include "systemd-basic/alloc-util.h"
+#include "systemd-basic/def.h"
+#include "systemd-basic/fd-util.h"
+#include "systemd-basic/fileio.h"
+#include "systemd-basic/ordered-set.h"
+#include "systemd-basic/path-util.h"
+#include "systemd-basic/set.h"
+#include "systemd-basic/virt.h"
+#include "systemd-shared/conf-parser.h"
+#include "systemd-shared/dns-domain.h"
+#include "systemd-shared/udev-util.h"
+#include "systemd-staging/sd-netlink.h"
+
+#include "networkd.h"
+
+/* use 8 MB for receive socket kernel queue. */
+#define RCVBUF_SIZE (8*1024*1024)
+
+const char* const network_dirs[] = {
+ "/etc/systemd/network",
+ "/run/systemd/network",
+ "/usr/lib/systemd/network",
+#ifdef HAVE_SPLIT_USR
+ "/lib/systemd/network",
+#endif
+ NULL};
+
+static int setup_default_address_pool(Manager *m) {
+ AddressPool *p;
+ int r;
+
+ assert(m);
+
+ /* Add in the well-known private address ranges. */
+
+ r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7);
+ if (r < 0)
+ return r;
+
+ r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
+ if (r < 0)
+ return r;
+
+ r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
+ if (r < 0)
+ return r;
+
+ r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int on_bus_retry(sd_event_source *s, usec_t usec, void *userdata) {
+ Manager *m = userdata;
+
+ assert(s);
+ assert(m);
+
+ m->bus_retry_event_source = sd_event_source_unref(m->bus_retry_event_source);
+
+ manager_connect_bus(m);
+
+ return 0;
+}
+
+static int manager_reset_all(Manager *m) {
+ Link *link;
+ Iterator i;
+ int r;
+
+ assert(m);
+
+ HASHMAP_FOREACH(link, m->links, i) {
+ r = link_carrier_reset(link);
+ if (r < 0)
+ log_link_warning_errno(link, r, "Could not reset carrier: %m");
+ }
+
+ return 0;
+}
+
+static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
+ Manager *m = userdata;
+ int b, r;
+
+ assert(message);
+
+ r = sd_bus_message_read(message, "b", &b);
+ if (r < 0) {
+ log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
+ return 0;
+ }
+
+ if (b)
+ return 0;
+
+ log_debug("Coming back from suspend, resetting all connections...");
+
+ manager_reset_all(m);
+
+ return 0;
+}
+
+int manager_connect_bus(Manager *m) {
+ int r;
+
+ assert(m);
+
+ r = sd_bus_default_system(&m->bus);
+ if (r == -ENOENT) {
+ /* We failed to connect? Yuck, we must be in early
+ * boot. Let's try in 5s again. As soon as we have
+ * kdbus we can stop doing this... */
+
+ log_debug_errno(r, "Failed to connect to bus, trying again in 5s: %m");
+
+ r = sd_event_add_time(m->event, &m->bus_retry_event_source, CLOCK_MONOTONIC, now(CLOCK_MONOTONIC) + 5*USEC_PER_SEC, 0, on_bus_retry, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to install bus reconnect time event: %m");
+
+ return 0;
+ }
+
+ if (r < 0)
+ return r;
+
+ r = sd_bus_add_match(m->bus, &m->prepare_for_sleep_slot,
+ "type='signal',"
+ "sender='org.freedesktop.login1',"
+ "interface='org.freedesktop.login1.Manager',"
+ "member='PrepareForSleep',"
+ "path='/org/freedesktop/login1'",
+ match_prepare_for_sleep,
+ m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add match for PrepareForSleep: %m");
+
+ r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add manager object vtable: %m");
+
+ r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add link object vtable: %m");
+
+ r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add link enumerator: %m");
+
+ r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add network object vtable: %m");
+
+ r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add network enumerator: %m");
+
+ r = sd_bus_request_name(m->bus, "org.freedesktop.network1", 0);
+ if (r < 0)
+ return log_error_errno(r, "Failed to register name: %m");
+
+ r = sd_bus_attach_event(m->bus, m->event, 0);
+ if (r < 0)
+ return log_error_errno(r, "Failed to attach bus to event loop: %m");
+
+ return 0;
+}
+
+static int manager_udev_process_link(Manager *m, struct udev_device *device) {
+ Link *link = NULL;
+ int r, ifindex;
+
+ assert(m);
+ assert(device);
+
+ if (!streq_ptr(udev_device_get_action(device), "add"))
+ return 0;
+
+ ifindex = udev_device_get_ifindex(device);
+ if (ifindex <= 0) {
+ log_debug("Ignoring udev ADD event for device with invalid ifindex");
+ return 0;
+ }
+
+ r = link_get(m, ifindex, &link);
+ if (r == -ENODEV)
+ return 0;
+ else if (r < 0)
+ return r;
+
+ r = link_initialized(link, device);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int manager_dispatch_link_udev(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
+ Manager *m = userdata;
+ struct udev_monitor *monitor = m->udev_monitor;
+ _cleanup_udev_device_unref_ struct udev_device *device = NULL;
+
+ device = udev_monitor_receive_device(monitor);
+ if (!device)
+ return -ENOMEM;
+
+ manager_udev_process_link(m, device);
+ return 0;
+}
+
+static int manager_connect_udev(Manager *m) {
+ int r;
+
+ /* udev does not initialize devices inside containers,
+ * so we rely on them being already initialized before
+ * entering the container */
+ if (detect_container() > 0)
+ return 0;
+
+ m->udev = udev_new();
+ if (!m->udev)
+ return -ENOMEM;
+
+ m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
+ if (!m->udev_monitor)
+ return -ENOMEM;
+
+ r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL);
+ if (r < 0)
+ return log_error_errno(r, "Could not add udev monitor filter: %m");
+
+ r = udev_monitor_enable_receiving(m->udev_monitor);
+ if (r < 0) {
+ log_error("Could not enable udev monitor");
+ return r;
+ }
+
+ r = sd_event_add_io(m->event,
+ &m->udev_event_source,
+ udev_monitor_get_fd(m->udev_monitor),
+ EPOLLIN, manager_dispatch_link_udev,
+ m);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_description(m->udev_event_source, "networkd-udev");
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
+ Manager *m = userdata;
+ Link *link = NULL;
+ uint16_t type;
+ uint32_t ifindex, priority = 0;
+ unsigned char protocol, scope, tos, table;
+ int family;
+ unsigned char dst_prefixlen, src_prefixlen;
+ union in_addr_union dst = {}, gw = {}, src = {}, prefsrc = {};
+ Route *route = NULL;
+ 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 route: %m");
+
+ return 0;
+ }
+
+ r = sd_netlink_message_get_type(message, &type);
+ if (r < 0) {
+ log_warning_errno(r, "rtnl: could not get message type: %m");
+ return 0;
+ } else if (type != RTM_NEWROUTE && type != RTM_DELROUTE) {
+ log_warning("rtnl: received unexpected message type when processing route");
+ return 0;
+ }
+
+ r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex);
+ if (r == -ENODATA) {
+ log_debug("rtnl: received route without ifindex, ignoring");
+ return 0;
+ } else if (r < 0) {
+ log_warning_errno(r, "rtnl: could not get ifindex from route, ignoring: %m");
+ return 0;
+ } else if (ifindex <= 0) {
+ log_warning("rtnl: received route 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 route again, so just ignore it */
+ if (!m->enumerating)
+ log_warning("rtnl: received route for nonexistent link (%d), ignoring", ifindex);
+ return 0;
+ }
+ }
+
+ r = sd_rtnl_message_route_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_route_get_protocol(message, &protocol);
+ if (r < 0) {
+ log_warning_errno(r, "rtnl: could not get route protocol: %m");
+ return 0;
+ }
+
+ switch (family) {
+ case AF_INET:
+ r = sd_netlink_message_read_in_addr(message, RTA_DST, &dst.in);
+ if (r < 0 && r != -ENODATA) {
+ log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
+ return 0;
+ }
+
+ r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &gw.in);
+ if (r < 0 && r != -ENODATA) {
+ log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
+ return 0;
+ }
+
+ r = sd_netlink_message_read_in_addr(message, RTA_SRC, &src.in);
+ if (r < 0 && r != -ENODATA) {
+ log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
+ return 0;
+ }
+
+ r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &prefsrc.in);
+ if (r < 0 && r != -ENODATA) {
+ log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
+ return 0;
+ }
+
+ break;
+
+ case AF_INET6:
+ r = sd_netlink_message_read_in6_addr(message, RTA_DST, &dst.in6);
+ if (r < 0 && r != -ENODATA) {
+ log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
+ return 0;
+ }
+
+ r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &gw.in6);
+ if (r < 0 && r != -ENODATA) {
+ log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
+ return 0;
+ }
+
+ r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &src.in6);
+ if (r < 0 && r != -ENODATA) {
+ log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
+ return 0;
+ }
+
+ r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &prefsrc.in6);
+ if (r < 0 && r != -ENODATA) {
+ log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
+ return 0;
+ }
+
+ break;
+
+ default:
+ log_link_debug(link, "rtnl: ignoring unsupported address family: %d", family);
+ return 0;
+ }
+
+ r = sd_rtnl_message_route_get_dst_prefixlen(message, &dst_prefixlen);
+ if (r < 0) {
+ log_link_warning_errno(link, r, "rtnl: received route with invalid destination prefixlen, ignoring: %m");
+ return 0;
+ }
+
+ r = sd_rtnl_message_route_get_src_prefixlen(message, &src_prefixlen);
+ if (r < 0) {
+ log_link_warning_errno(link, r, "rtnl: received route with invalid source prefixlen, ignoring: %m");
+ return 0;
+ }
+
+ r = sd_rtnl_message_route_get_scope(message, &scope);
+ if (r < 0) {
+ log_link_warning_errno(link, r, "rtnl: received route with invalid scope, ignoring: %m");
+ return 0;
+ }
+
+ r = sd_rtnl_message_route_get_tos(message, &tos);
+ if (r < 0) {
+ log_link_warning_errno(link, r, "rtnl: received route with invalid tos, ignoring: %m");
+ return 0;
+ }
+
+ r = sd_rtnl_message_route_get_table(message, &table);
+ if (r < 0) {
+ log_link_warning_errno(link, r, "rtnl: received route with invalid table, ignoring: %m");
+ return 0;
+ }
+
+ r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &priority);
+ if (r < 0 && r != -ENODATA) {
+ log_link_warning_errno(link, r, "rtnl: received route with invalid priority, ignoring: %m");
+ return 0;
+ }
+
+ route_get(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
+
+ switch (type) {
+ case RTM_NEWROUTE:
+ if (!route) {
+ /* A route appeared that we did not request */
+ r = route_add_foreign(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
+ if (r < 0)
+ return 0;
+ }
+
+ route_update(route, &src, src_prefixlen, &gw, &prefsrc, scope, protocol);
+
+ break;
+
+ case RTM_DELROUTE:
+ route_free(route);
+ break;
+
+ default:
+ assert_not_reached("Received invalid RTNL message type");
+ }
+
+ return 1;
+}
+
+int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
+ Manager *m = userdata;
+ Link *link = NULL;
+ uint16_t type;
+ unsigned char flags;
+ int family;
+ unsigned char prefixlen;
+ unsigned char scope;
+ union in_addr_union in_addr;
+ struct ifa_cacheinfo cinfo;
+ Address *address = NULL;
+ char buf[INET6_ADDRSTRLEN], valid_buf[FORMAT_TIMESPAN_MAX];
+ const char *valid_str = NULL;
+ 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: failed to receive address: %m");
+
+ return 0;
+ }
+
+ r = sd_netlink_message_get_type(message, &type);
+ if (r < 0) {
+ log_warning_errno(r, "rtnl: could not get message type: %m");
+ return 0;
+ } else if (type != RTM_NEWADDR && type != RTM_DELADDR) {
+ log_warning("rtnl: received unexpected message type when processing address");
+ 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: %m");
+ return 0;
+ } else if (ifindex <= 0) {
+ log_warning("rtnl: received address message with invalid ifindex: %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:
+ log_link_debug(link, "rtnl: ignoring unsupported address family: %d", family);
+ }
+
+ if (!inet_ntop(family, &in_addr, buf, INET6_ADDRSTRLEN)) {
+ log_link_warning(link, "Could not print address");
+ return 0;
+ }
+
+ r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo);
+ 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);
+ }
+
+ 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", 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: %m", buf, prefixlen);
+ return 0;
+ } else
+ log_link_debug(link, "Adding address: %s/%u (valid %s%s)", buf, prefixlen,
+ valid_str ? "for " : "forever", valid_str ?: "");
+ }
+
+ address_update(address, flags, scope, &cinfo);
+
+ break;
+
+ case RTM_DELADDR:
+
+ if (address) {
+ log_link_debug(link, "Removing address: %s/%u (valid %s%s)", buf, prefixlen,
+ valid_str ? "for " : "forever", valid_str ?: "");
+ address_drop(address);
+ } else
+ log_link_warning(link, "Removing non-existent address: %s/%u (valid %s%s)", buf, prefixlen,
+ valid_str ? "for " : "forever", 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: %m");
+
+ return 0;
+ }
+
+ r = sd_netlink_message_get_type(message, &type);
+ if (r < 0) {
+ log_warning_errno(r, "rtnl: Could not get message type: %m");
+ return 0;
+ } else if (type != RTM_NEWLINK && type != RTM_DELLINK) {
+ log_warning("rtnl: Received unexpected message type when processing link");
+ 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: %m");
+ return 0;
+ } else if (ifindex <= 0) {
+ log_warning("rtnl: received link message with invalid ifindex: %d", 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: %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: %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: %m");
+ return 0;
+ }
+ }
+
+ r = link_update(link, message);
+ if (r < 0)
+ return 0;
+
+ break;
+
+ case RTM_DELLINK:
+ link_drop(link);
+ netdev_drop(netdev);
+
+ 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_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;
+
+ return 0;
+}
+
+static int ordered_set_put_in_addr(OrderedSet *s, const struct in_addr *address) {
+ char *p;
+ int r;
+
+ assert(s);
+
+ 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_in_addrv(OrderedSet *s, const struct in_addr *addresses, int n) {
+ int r, i, c = 0;
+
+ assert(s);
+ assert(n <= 0 || addresses);
+
+ for (i = 0; i < n; i++) {
+ r = ordered_set_put_in_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_strdupv(dns, link->network->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_in_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_in_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;
+
+ r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
+ if (r >= 0) {
+
+ if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES)
+ r = ordered_set_put_strdup(search_domains, domainname);
+ else
+ r = ordered_set_put_strdup(route_domains, domainname);
+
+ 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;
+
+ 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 = 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;
+}
+
+int manager_new(Manager **ret) {
+ _cleanup_manager_free_ 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;
+
+ r = sd_event_default(&m->event);
+ if (r < 0)
+ return r;
+
+ sd_event_set_watchdog(m->event, true);
+
+ sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
+ sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
+
+ 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_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 = setup_default_address_pool(m);
+ if (r < 0)
+ return r;
+
+ m->duid.type = DUID_TYPE_EN;
+
+ *ret = m;
+ m = NULL;
+
+ return 0;
+}
+
+void manager_free(Manager *m) {
+ Network *network;
+ NetDev *netdev;
+ Link *link;
+ AddressPool *pool;
+
+ if (!m)
+ return;
+
+ free(m->state_file);
+
+ while ((link = hashmap_first(m->links)))
+ link_unref(link);
+ hashmap_free(m->links);
+
+ while ((network = m->networks))
+ network_free(network);
+
+ 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);
+
+ sd_netlink_unref(m->rtnl);
+ sd_event_unref(m->event);
+
+ 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_event_source_unref(m->bus_retry_event_source);
+
+ free(m);
+}
+
+static bool manager_check_idle(void *userdata) {
+ Manager *m = userdata;
+ Link *link;
+ Iterator i;
+
+ assert(m);
+
+ /* Check whether we are idle now. The only case when we decide to be idle is when there's only a loopback
+ * device around, for which we have no configuration, and which already left the PENDING state. In all other
+ * cases we are not idle. */
+
+ HASHMAP_FOREACH(link, m->links, i) {
+ /* We are not woken on udev activity, so let's just wait for the pending udev event */
+ if (link->state == LINK_STATE_PENDING)
+ return false;
+
+ if ((link->flags & IFF_LOOPBACK) == 0)
+ return false;
+
+ if (link->network)
+ return false;
+ }
+
+ return true;
+}
+
+int manager_run(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);
+
+ if (m->bus)
+ return bus_event_loop_with_idle(
+ m->event,
+ m->bus,
+ "org.freedesktop.network1",
+ DEFAULT_EXIT_USEC,
+ manager_check_idle,
+ m);
+ else
+ /* failed to connect to the bus, so we lose exit-on-idle logic,
+ this should not happen except if dbus is not around at all */
+ return sd_event_loop(m->event);
+}
+
+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_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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 10:38:31 +0000