diff options
Diffstat (limited to 'src/network/networkd-manager.c')
| -rw-r--r-- | src/network/networkd-manager.c | 1860 |
1 files changed, 1860 insertions, 0 deletions
diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c new file mode 100644 index 0000000..c8d369e --- /dev/null +++ b/src/network/networkd-manager.c @@ -0,0 +1,1860 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ + +#include <sys/socket.h> +#include <linux/if.h> +#include <linux/fib_rules.h> +#include <stdio_ext.h> + +#include "sd-daemon.h" +#include "sd-netlink.h" + +#include "alloc-util.h" +#include "bus-util.h" +#include "conf-parser.h" +#include "def.h" +#include "device-util.h" +#include "dns-domain.h" +#include "fd-util.h" +#include "fileio.h" +#include "local-addresses.h" +#include "netlink-util.h" +#include "networkd-manager.h" +#include "ordered-set.h" +#include "path-util.h" +#include "set.h" +#include "strv.h" +#include "tmpfile-util.h" +#include "virt.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", +#if 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 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); + assert(m); + + 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..."); + + (void) manager_reset_all(m); + + return 0; +} + +static int on_connected(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) { + Manager *m = userdata; + + assert(message); + assert(m); + + /* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */ + if (m->dynamic_hostname) + (void) manager_set_hostname(m, m->dynamic_hostname); + if (m->dynamic_timezone) + (void) manager_set_timezone(m, m->dynamic_timezone); + if (m->links_requesting_uuid) + (void) manager_request_product_uuid(m, NULL); + + return 0; +} + +int manager_connect_bus(Manager *m) { + int r; + + assert(m); + + if (m->bus) + return 0; + + r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-network"); + if (r < 0) + return log_error_errno(r, "Failed to connect to bus: %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_async(m->bus, NULL, "org.freedesktop.network1", 0, NULL, NULL); + if (r < 0) + return log_error_errno(r, "Failed to request 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"); + + r = sd_bus_match_signal_async( + m->bus, + NULL, + "org.freedesktop.DBus.Local", + NULL, + "org.freedesktop.DBus.Local", + "Connected", + on_connected, NULL, m); + if (r < 0) + return log_error_errno(r, "Failed to request match on Connected signal: %m"); + + r = sd_bus_match_signal_async( + m->bus, + NULL, + "org.freedesktop.login1", + "/org/freedesktop/login1", + "org.freedesktop.login1.Manager", + "PrepareForSleep", + match_prepare_for_sleep, NULL, m); + if (r < 0) + log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m"); + + return 0; +} + +static int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) { + Manager *m = userdata; + const char *action; + Link *link = NULL; + int r, ifindex; + + assert(m); + assert(device); + + r = sd_device_get_property_value(device, "ACTION", &action); + if (r < 0) { + log_device_debug_errno(device, r, "Failed to get 'ACTION' property, ignoring device: %m"); + return 0; + } + + if (!STR_IN_SET(action, "add", "change")) { + log_device_debug(device, "Ignoring udev %s event for device.", action); + return 0; + } + + r = sd_device_get_ifindex(device, &ifindex); + if (r < 0) { + log_device_debug_errno(device, r, "Ignoring udev ADD event for device without ifindex or with invalid ifindex: %m"); + return 0; + } + + r = link_get(m, ifindex, &link); + if (r < 0) { + if (r != -ENODEV) + log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex); + return 0; + } + + (void) link_initialized(link, 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; + + r = sd_device_monitor_new(&m->device_monitor); + if (r < 0) + return log_error_errno(r, "Failed to initialize device monitor: %m"); + + r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "net", NULL); + if (r < 0) + return log_error_errno(r, "Could not add device monitor filter: %m"); + + r = sd_device_monitor_attach_event(m->device_monitor, m->event); + if (r < 0) + return log_error_errno(r, "Failed to attach event to device monitor: %m"); + + r = sd_device_monitor_start(m->device_monitor, manager_udev_process_link, m); + if (r < 0) + return log_error_errno(r, "Failed to start device monitor: %m"); + + 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, rt_type; + 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, 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_NEWROUTE, RTM_DELROUTE)) { + log_warning("rtnl: received unexpected message type when processing route, ignoring"); + 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: + assert_not_reached("Received unsupported address 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_type(message, &rt_type); + if (r < 0) { + log_link_warning_errno(link, r, "rtnl: received route with invalid type, 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; + } + + (void) 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) { + log_link_warning_errno(link, r, "Failed to add route, ignoring: %m"); + return 0; + } + } + + route_update(route, &src, src_prefixlen, &gw, &prefsrc, scope, protocol, rt_type); + + 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, 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_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, protocol = 0; + struct fib_rule_port_range sport = {}, dport = {}; + union in_addr_union to = {}, from = {}; + RoutingPolicyRule *rule = NULL; + uint32_t fwmark = 0, table = 0; + const 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 retrieve 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 retrieve 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 retrieve 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 retrieve 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, &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, &oif); + if (r < 0 && r != -ENODATA) { + log_warning_errno(r, "rtnl: could not get FRA_OIFNAME attribute, ignoring: %m"); + return 0; + } + + r = sd_netlink_message_read_u8(message, FRA_IP_PROTO, &protocol); + if (r < 0 && r != -ENODATA) { + log_warning_errno(r, "rtnl: could not get FRA_IP_PROTO attribute, ignoring: %m"); + return 0; + } + + r = sd_netlink_message_read(message, FRA_SPORT_RANGE, sizeof(sport), (void *) &sport); + if (r < 0 && r != -ENODATA) { + log_warning_errno(r, "rtnl: could not get FRA_SPORT_RANGE attribute, ignoring: %m"); + return 0; + } + + r = sd_netlink_message_read(message, FRA_DPORT_RANGE, sizeof(dport), (void *) &dport); + if (r < 0 && r != -ENODATA) { + log_warning_errno(r, "rtnl: could not get FRA_DPORT_RANGE attribute, ignoring: %m"); + return 0; + } + + (void) routing_policy_rule_get(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, iif, oif, protocol, &sport, &dport, &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, protocol, &sport, &dport, &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, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link"); + if (r < 0) + return r; + + r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link"); + if (r < 0) + return r; + + r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address"); + if (r < 0) + return r; + + r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address"); + if (r < 0) + return r; + + r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route"); + if (r < 0) + return r; + + r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route"); + if (r < 0) + return r; + + r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule"); + if (r < 0) + return r; + + r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule"); + 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; + + assert(m); + + if (m->dirty) + manager_save(m); + + SET_FOREACH(link, m->dirty_links, i) + if (link_save(link) >= 0) + link_clean(link); + + return 1; +} + +Link *manager_dhcp6_prefix_get(Manager *m, struct in6_addr *addr) { + assert_return(m, NULL); + assert_return(addr, NULL); + + return hashmap_get(m->dhcp6_prefixes, addr); +} + +static int dhcp6_route_add_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) { + int r; + + assert(link); + + r = sd_netlink_message_get_errno(m); + if (r < 0 && r != -EEXIST) + log_link_debug_errno(link, r, "Received error adding DHCPv6 Prefix Delegation route: %m"); + + return 0; +} + +static void dhcp6_prefixes_hash_func(const struct in6_addr *addr, struct siphash *state) { + assert(addr); + + siphash24_compress(addr, sizeof(*addr), state); +} + +static int dhcp6_prefixes_compare_func(const struct in6_addr *a, const struct in6_addr *b) { + return memcmp(a, b, sizeof(*a)); +} + +DEFINE_PRIVATE_HASH_OPS(dhcp6_prefixes_hash_ops, struct in6_addr, dhcp6_prefixes_hash_func, dhcp6_prefixes_compare_func); + +int manager_dhcp6_prefix_add(Manager *m, struct in6_addr *addr, Link *link) { + _cleanup_free_ char *buf = NULL; + Route *route; + int r; + + assert_return(m, -EINVAL); + 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_handler); + if (r < 0) + return r; + + (void) in_addr_to_string(AF_INET6, (union in_addr_union *) addr, &buf); + log_link_debug(link, "Adding prefix route %s/64", strnull(buf)); + + r = hashmap_ensure_allocated(&m->dhcp6_prefixes, &dhcp6_prefixes_hash_ops); + if (r < 0) + return r; + + return hashmap_put(m->dhcp6_prefixes, addr, link); +} + +static int dhcp6_route_remove_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) { + int r; + + assert(link); + + r = sd_netlink_message_get_errno(m); + if (r < 0) + log_link_debug_errno(link, r, "Received error on DHCPv6 Prefix Delegation route removal: %m"); + + return 1; +} + +static int manager_dhcp6_prefix_remove(Manager *m, struct in6_addr *addr) { + _cleanup_free_ char *buf = NULL; + Route *route; + Link *l; + int r; + + assert_return(m, -EINVAL); + 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) + return r; + + r = route_remove(route, l, dhcp6_route_remove_handler); + if (r < 0) + return r; + + (void) in_addr_to_string(AF_INET6, (union in_addr_union *) addr, &buf); + log_link_debug(l, "Removing prefix route %s/64", strnull(buf)); + + return 0; +} + +int manager_dhcp6_prefix_remove_all(Manager *m, Link *link) { + struct in6_addr *addr; + Iterator i; + Link *l; + + 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; +} + +int manager_new(Manager **ret) { + _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; + + r = sd_event_default(&m->event); + if (r < 0) + return r; + + (void) sd_event_set_watchdog(m->event, true); + (void) sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); + (void) 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_genl(m); + if (r < 0) + return r; + + r = manager_connect_udev(m); + if (r < 0) + return r; + + 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->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) { + AddressPool *pool; + Network *network; + Link *link; + + if (!m) + return; + + free(m->state_file); + + sd_netlink_unref(m->rtnl); + sd_netlink_unref(m->genl); + sd_resolve_unref(m->resolve); + + while ((network = m->networks)) + network_free(network); + + while ((link = hashmap_first(m->dhcp6_prefixes))) + manager_dhcp6_prefix_remove_all(m, link); + hashmap_free(m->dhcp6_prefixes); + + while ((link = hashmap_steal_first(m->links))) { + if (link->dhcp6_client) + (void) dhcp6_lease_pd_prefix_lost(link->dhcp6_client, link); + link_unref(link); + } + + m->dirty_links = set_free_with_destructor(m->dirty_links, link_unref); + m->links = hashmap_free(m->links); + m->links_requesting_uuid = set_free(m->links_requesting_uuid); + set_free(m->duids_requesting_uuid); + + hashmap_free(m->networks_by_name); + + m->netdevs = hashmap_free_with_destructor(m->netdevs, netdev_unref); + + while ((pool = m->address_pools)) + address_pool_free(pool); + + /* routing_policy_rule_free() access m->rules and m->rules_foreign. + * So, it is necessary to set NULL after the sets are freed. */ + m->rules = set_free_with_destructor(m->rules, routing_policy_rule_free); + m->rules_foreign = set_free_with_destructor(m->rules_foreign, routing_policy_rule_free); + set_free_with_destructor(m->rules_saved, routing_policy_rule_free); + + sd_event_unref(m->event); + + sd_device_monitor_unref(m->device_monitor); + + sd_bus_flush_close_unref(m->bus); + + 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_debug("Not connected to system bus, setting hostname later."); + 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_debug("Not connected to system bus, setting timezone later."); + 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; +} + +int manager_request_product_uuid(Manager *m, Link *link) { + int r; + + assert(m); + + if (m->has_product_uuid) + return 0; + + log_debug("Requesting product UUID"); + + if (link) { + DUID *duid; + + assert_se(duid = link_get_duid(link)); + + r = set_ensure_allocated(&m->links_requesting_uuid, NULL); + if (r < 0) + return log_oom(); + + r = set_ensure_allocated(&m->duids_requesting_uuid, NULL); + if (r < 0) + return log_oom(); + + r = set_put(m->links_requesting_uuid, link); + if (r < 0) + return log_oom(); + + r = set_put(m->duids_requesting_uuid, duid); + if (r < 0) + return log_oom(); + } + + if (!m->bus || sd_bus_is_ready(m->bus) <= 0) { + log_debug("Not connected to system bus, requesting product UUID later."); + return 0; + } + + r = sd_bus_call_method_async( + m->bus, + NULL, + "org.freedesktop.hostname1", + "/org/freedesktop/hostname1", + "org.freedesktop.hostname1", + "GetProductUUID", + get_product_uuid_handler, + m, + "b", + false); + if (r < 0) + return log_warning_errno(r, "Failed to get product UUID: %m"); + + return 0; +} |