| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| 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 <netinet/ether.h> |
| #include <linux/if.h> |
| |
| #include "networkd.h" |
| #include "libudev-private.h" |
| #include "udev-util.h" |
| #include "util.h" |
| #include "virt.h" |
| #include "bus-util.h" |
| #include "network-internal.h" |
| |
| #include "network-util.h" |
| #include "dhcp-lease-internal.h" |
| |
| static int ipv4ll_address_update(Link *link, bool deprecate); |
| static bool ipv4ll_is_bound(sd_ipv4ll *ll); |
| |
| static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) { |
| _cleanup_link_unref_ Link *link = NULL; |
| uint16_t type; |
| char *ifname; |
| int r, ifindex; |
| |
| assert(manager); |
| assert(manager->links); |
| assert(message); |
| assert(ret); |
| |
| r = sd_rtnl_message_get_type(message, &type); |
| if (r < 0) |
| return r; |
| else if (type != RTM_NEWLINK) |
| return -EINVAL; |
| |
| r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
| if (r < 0) |
| return r; |
| else if (ifindex <= 0) |
| return -EINVAL; |
| |
| r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &ifname); |
| if (r < 0) |
| return r; |
| |
| link = new0(Link, 1); |
| if (!link) |
| return -ENOMEM; |
| |
| link->n_ref = 1; |
| link->manager = manager; |
| link->state = LINK_STATE_INITIALIZING; |
| link->ifindex = ifindex; |
| link->ifname = strdup(ifname); |
| if (!link->ifname) |
| return -ENOMEM; |
| |
| r = asprintf(&link->state_file, "/run/systemd/network/links/%"PRIu64, |
| link->ifindex); |
| if (r < 0) |
| return -ENOMEM; |
| |
| r = asprintf(&link->lease_file, "/run/systemd/network/leases/%"PRIu64, |
| link->ifindex); |
| if (r < 0) |
| return -ENOMEM; |
| |
| r = hashmap_put(manager->links, &link->ifindex, link); |
| if (r < 0) |
| return r; |
| |
| *ret = link; |
| link = NULL; |
| |
| return 0; |
| } |
| |
| static void link_free(Link *link) { |
| Address *address; |
| |
| if (!link) |
| return; |
| |
| assert(link->manager); |
| |
| while ((address = link->addresses)) { |
| LIST_REMOVE(addresses, link->addresses, address); |
| address_free(address); |
| } |
| |
| sd_dhcp_client_unref(link->dhcp_client); |
| sd_dhcp_lease_unref(link->dhcp_lease); |
| |
| unlink(link->lease_file); |
| free(link->lease_file); |
| |
| sd_ipv4ll_unref(link->ipv4ll); |
| |
| hashmap_remove(link->manager->links, &link->ifindex); |
| |
| free(link->ifname); |
| |
| unlink(link->state_file); |
| free(link->state_file); |
| |
| udev_device_unref(link->udev_device); |
| |
| free(link); |
| } |
| |
| Link *link_unref(Link *link) { |
| if (link && (-- link->n_ref <= 0)) |
| link_free(link); |
| |
| return NULL; |
| } |
| |
| Link *link_ref(Link *link) { |
| if (link) |
| assert_se(++ link->n_ref >= 2); |
| |
| return link; |
| } |
| |
| int link_get(Manager *m, int ifindex, Link **ret) { |
| Link *link; |
| uint64_t ifindex_64; |
| |
| assert(m); |
| assert(m->links); |
| assert(ifindex); |
| assert(ret); |
| |
| ifindex_64 = ifindex; |
| link = hashmap_get(m->links, &ifindex_64); |
| if (!link) |
| return -ENODEV; |
| |
| *ret = link; |
| |
| return 0; |
| } |
| |
| void link_drop(Link *link) { |
| if (!link || link->state == LINK_STATE_LINGER) |
| return; |
| |
| link->state = LINK_STATE_LINGER; |
| |
| log_debug_link(link, "link removed"); |
| |
| link_unref(link); |
| |
| return; |
| } |
| |
| static int link_enter_configured(Link *link) { |
| assert(link); |
| assert(link->state == LINK_STATE_SETTING_ROUTES); |
| |
| log_info_link(link, "link configured"); |
| |
| link->state = LINK_STATE_CONFIGURED; |
| |
| link_save(link); |
| |
| return 0; |
| } |
| |
| static void link_enter_unmanaged(Link *link) { |
| assert(link); |
| |
| log_debug_link(link, "unmanaged"); |
| |
| link->state = LINK_STATE_UNMANAGED; |
| |
| link_save(link); |
| } |
| |
| static int link_stop_clients(Link *link) { |
| int r = 0, k; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->event); |
| |
| if (!link->network) |
| return 0; |
| |
| if (link->network->dhcp) { |
| assert(link->dhcp_client); |
| |
| k = sd_dhcp_client_stop(link->dhcp_client); |
| if (k < 0) { |
| log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r)); |
| r = k; |
| } |
| } |
| |
| if (link->network->ipv4ll) { |
| assert(link->ipv4ll); |
| |
| k = sd_ipv4ll_stop(link->ipv4ll); |
| if (k < 0) { |
| log_warning_link(link, "Could not stop IPv4 link-local: %s", strerror(-r)); |
| r = k; |
| } |
| } |
| |
| return r; |
| } |
| |
| static void link_enter_failed(Link *link) { |
| assert(link); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return; |
| |
| log_warning_link(link, "failed"); |
| |
| link->state = LINK_STATE_FAILED; |
| |
| link_stop_clients(link); |
| |
| link_save(link); |
| } |
| |
| static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
| Link *link = userdata; |
| int r; |
| |
| assert(link->route_messages > 0); |
| assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES, |
| LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED, |
| LINK_STATE_LINGER)); |
| |
| link->route_messages --; |
| |
| if (IN_SET(LINK_STATE_FAILED, LINK_STATE_LINGER)) { |
| link_unref(link); |
| return 1; |
| } |
| |
| r = sd_rtnl_message_get_errno(m); |
| if (r < 0 && r != -EEXIST) |
| log_struct_link(LOG_WARNING, link, |
| "MESSAGE=%*s: could not set route: %s", |
| IFNAMSIZ, |
| link->ifname, strerror(-r), |
| "ERRNO=%d", -r, |
| NULL); |
| |
| /* we might have received an old reply after moving back to SETTING_ADDRESSES, |
| * ignore it */ |
| if (link->route_messages == 0 && link->state == LINK_STATE_SETTING_ROUTES) { |
| log_debug_link(link, "routes set"); |
| link_enter_configured(link); |
| } |
| |
| link_unref(link); |
| |
| return 1; |
| } |
| |
| static int link_enter_set_routes(Link *link) { |
| Route *rt; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->state == LINK_STATE_SETTING_ADDRESSES); |
| |
| link->state = LINK_STATE_SETTING_ROUTES; |
| |
| if (!link->network->static_routes && !link->dhcp_lease && |
| (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false)) |
| return link_enter_configured(link); |
| |
| log_debug_link(link, "setting routes"); |
| |
| LIST_FOREACH(routes, rt, link->network->static_routes) { |
| r = route_configure(rt, link, &route_handler); |
| if (r < 0) { |
| log_warning_link(link, |
| "could not set routes: %s", strerror(-r)); |
| link_enter_failed(link); |
| return r; |
| } |
| |
| link_ref(link); |
| link->route_messages ++; |
| } |
| |
| if (link->ipv4ll && !link->dhcp_lease) { |
| _cleanup_route_free_ Route *route = NULL; |
| struct in_addr addr; |
| |
| r = sd_ipv4ll_get_address(link->ipv4ll, &addr); |
| if (r < 0 && r != -ENOENT) { |
| log_warning_link(link, "IPV4LL error: no address: %s", |
| strerror(-r)); |
| return r; |
| } |
| |
| if (r != -ENOENT) { |
| r = route_new_dynamic(&route); |
| if (r < 0) { |
| log_error_link(link, "Could not allocate route: %s", |
| strerror(-r)); |
| return r; |
| } |
| |
| route->family = AF_INET; |
| route->scope = RT_SCOPE_LINK; |
| route->metrics = 99; |
| |
| r = route_configure(route, link, &route_handler); |
| if (r < 0) { |
| log_warning_link(link, |
| "could not set routes: %s", strerror(-r)); |
| link_enter_failed(link); |
| return r; |
| } |
| |
| link_ref(link); |
| link->route_messages ++; |
| } |
| } |
| |
| if (link->dhcp_lease) { |
| _cleanup_route_free_ Route *route = NULL; |
| _cleanup_route_free_ Route *route_gw = NULL; |
| struct in_addr gateway; |
| |
| r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); |
| if (r < 0 && r != -ENOENT) { |
| log_warning_link(link, "DHCP error: %s", strerror(-r)); |
| return r; |
| } |
| |
| if (r >= 0) { |
| r = route_new_dynamic(&route); |
| if (r < 0) { |
| log_error_link(link, "Could not allocate route: %s", |
| strerror(-r)); |
| return r; |
| } |
| |
| r = route_new_dynamic(&route_gw); |
| if (r < 0) { |
| log_error_link(link, "Could not allocate route: %s", |
| strerror(-r)); |
| return r; |
| } |
| |
| /* The dhcp netmask may mask out the gateway. Add an explicit |
| * route for the gw host so that we can route no matter the |
| * netmask or existing kernel route tables. */ |
| route_gw->family = AF_INET; |
| route_gw->dst_addr.in = gateway; |
| route_gw->dst_prefixlen = 32; |
| route_gw->scope = RT_SCOPE_LINK; |
| |
| r = route_configure(route_gw, link, &route_handler); |
| if (r < 0) { |
| log_warning_link(link, |
| "could not set host route: %s", strerror(-r)); |
| return r; |
| } |
| |
| link_ref(link); |
| link->route_messages ++; |
| |
| route->family = AF_INET; |
| route->in_addr.in = gateway; |
| |
| r = route_configure(route, link, &route_handler); |
| if (r < 0) { |
| log_warning_link(link, |
| "could not set routes: %s", strerror(-r)); |
| link_enter_failed(link); |
| return r; |
| } |
| |
| link_ref(link); |
| link->route_messages ++; |
| } |
| } |
| |
| if (link->route_messages == 0) { |
| link_enter_configured(link); |
| } |
| |
| return 0; |
| } |
| |
| static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
| Link *link = userdata; |
| int r; |
| |
| assert(m); |
| assert(link); |
| assert(link->ifname); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { |
| link_unref(link); |
| return 1; |
| } |
| |
| r = sd_rtnl_message_get_errno(m); |
| if (r < 0 && r != -ESRCH) |
| log_struct_link(LOG_WARNING, link, |
| "MESSAGE=%*s: could not drop route: %s", |
| IFNAMSIZ, |
| link->ifname, strerror(-r), |
| "ERRNO=%d", -r, |
| NULL); |
| |
| link_unref(link); |
| |
| return 0; |
| } |
| |
| static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
| Link *link = userdata; |
| int r; |
| |
| assert(m); |
| assert(link); |
| assert(link->ifname); |
| assert(link->addr_messages > 0); |
| assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES, |
| LINK_STATE_FAILED, LINK_STATE_LINGER)); |
| |
| link->addr_messages --; |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { |
| link_unref(link); |
| return 1; |
| } |
| |
| r = sd_rtnl_message_get_errno(m); |
| if (r < 0 && r != -EEXIST) |
| log_struct_link(LOG_WARNING, link, |
| "MESSAGE=%*s: could not set address: %s", |
| IFNAMSIZ, |
| link->ifname, strerror(-r), |
| "ERRNO=%d", -r, |
| NULL); |
| |
| if (link->addr_messages == 0) { |
| log_debug_link(link, "addresses set"); |
| link_enter_set_routes(link); |
| } |
| |
| link_unref(link); |
| |
| return 1; |
| } |
| |
| static int link_enter_set_addresses(Link *link) { |
| Address *ad; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->state != _LINK_STATE_INVALID); |
| |
| link->state = LINK_STATE_SETTING_ADDRESSES; |
| |
| if (!link->network->static_addresses && !link->dhcp_lease && |
| (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false)) |
| return link_enter_set_routes(link); |
| |
| log_debug_link(link, "setting addresses"); |
| |
| LIST_FOREACH(addresses, ad, link->network->static_addresses) { |
| r = address_configure(ad, link, &address_handler); |
| if (r < 0) { |
| log_warning_link(link, |
| "could not set addresses: %s", strerror(-r)); |
| link_enter_failed(link); |
| return r; |
| } |
| |
| link_ref(link); |
| link->addr_messages ++; |
| } |
| |
| if (link->ipv4ll && !link->dhcp_lease) { |
| _cleanup_address_free_ Address *ll_addr = NULL; |
| struct in_addr addr; |
| |
| r = sd_ipv4ll_get_address(link->ipv4ll, &addr); |
| if (r < 0 && r != -ENOENT) { |
| log_warning_link(link, "IPV4LL error: no address: %s", |
| strerror(-r)); |
| return r; |
| } |
| |
| if (r != -ENOENT) { |
| r = address_new_dynamic(&ll_addr); |
| if (r < 0) { |
| log_error_link(link, "Could not allocate address: %s", strerror(-r)); |
| return r; |
| } |
| |
| ll_addr->family = AF_INET; |
| ll_addr->in_addr.in = addr; |
| ll_addr->prefixlen = 16; |
| ll_addr->broadcast.s_addr = ll_addr->in_addr.in.s_addr | htonl(0xfffffffflu >> ll_addr->prefixlen); |
| ll_addr->scope = RT_SCOPE_LINK; |
| |
| r = address_configure(ll_addr, link, &address_handler); |
| if (r < 0) { |
| log_warning_link(link, |
| "could not set addresses: %s", strerror(-r)); |
| link_enter_failed(link); |
| return r; |
| } |
| |
| link_ref(link); |
| link->addr_messages ++; |
| } |
| } |
| |
| if (link->dhcp_lease) { |
| _cleanup_address_free_ Address *address = NULL; |
| struct in_addr addr; |
| struct in_addr netmask; |
| unsigned prefixlen; |
| |
| r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr); |
| if (r < 0) { |
| log_warning_link(link, "DHCP error: no address: %s", |
| strerror(-r)); |
| return r; |
| } |
| |
| r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); |
| if (r < 0) { |
| log_warning_link(link, "DHCP error: no netmask: %s", |
| strerror(-r)); |
| return r; |
| } |
| |
| prefixlen = net_netmask_to_prefixlen(&netmask); |
| |
| r = address_new_dynamic(&address); |
| if (r < 0) { |
| log_error_link(link, "Could not allocate address: %s", |
| strerror(-r)); |
| return r; |
| } |
| |
| address->family = AF_INET; |
| address->in_addr.in = addr; |
| address->prefixlen = prefixlen; |
| address->broadcast.s_addr = addr.s_addr | ~netmask.s_addr; |
| |
| r = address_configure(address, link, &address_handler); |
| if (r < 0) { |
| log_warning_link(link, |
| "could not set addresses: %s", strerror(-r)); |
| link_enter_failed(link); |
| return r; |
| } |
| |
| link_ref(link); |
| link->addr_messages ++; |
| } |
| |
| return 0; |
| } |
| |
| static int address_update_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
| Link *link = userdata; |
| int r; |
| |
| assert(m); |
| assert(link); |
| assert(link->ifname); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { |
| link_unref(link); |
| return 1; |
| } |
| |
| r = sd_rtnl_message_get_errno(m); |
| if (r < 0 && r != -ENOENT) |
| log_struct_link(LOG_WARNING, link, |
| "MESSAGE=%*s: could not update address: %s", |
| IFNAMSIZ, |
| link->ifname, strerror(-r), |
| "ERRNO=%d", -r, |
| NULL); |
| |
| link_unref(link); |
| |
| return 0; |
| } |
| |
| static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
| Link *link = userdata; |
| int r; |
| |
| assert(m); |
| assert(link); |
| assert(link->ifname); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { |
| link_unref(link); |
| return 1; |
| } |
| |
| r = sd_rtnl_message_get_errno(m); |
| if (r < 0 && r != -EADDRNOTAVAIL) |
| log_struct_link(LOG_WARNING, link, |
| "MESSAGE=%*s: could not drop address: %s", |
| IFNAMSIZ, |
| link->ifname, strerror(-r), |
| "ERRNO=%d", -r, |
| NULL); |
| |
| link_unref(link); |
| |
| return 0; |
| } |
| |
| static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { |
| Link *link = userdata; |
| int r; |
| |
| assert(link); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { |
| link_unref(link); |
| return 1; |
| } |
| |
| r = sd_bus_message_get_errno(m); |
| if (r < 0) |
| log_warning_link(link, "Could not set hostname: %s", strerror(-r)); |
| |
| link_unref(link); |
| |
| return 1; |
| } |
| |
| static int link_set_hostname(Link *link, const char *hostname) { |
| _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
| int r = 0; |
| |
| assert(link); |
| assert(link->manager); |
| assert(hostname); |
| |
| log_debug_link(link, "Setting transient hostname: '%s'", hostname); |
| |
| if (!link->manager->bus) { /* TODO: replace by assert when we can rely on kdbus */ |
| log_info_link(link, "Not connected to system bus, ignoring transient hostname."); |
| return 0; |
| } |
| |
| r = sd_bus_message_new_method_call( |
| link->manager->bus, |
| &m, |
| "org.freedesktop.hostname1", |
| "/org/freedesktop/hostname1", |
| "org.freedesktop.hostname1", |
| "SetHostname"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append(m, "sb", hostname, false); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_call_async(link->manager->bus, NULL, m, set_hostname_handler, link, 0); |
| if (r < 0) |
| log_error_link(link, "Could not set transient hostname: %s", strerror(-r)); |
| |
| link_ref(link); |
| |
| return r; |
| } |
| |
| static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
| Link *link = userdata; |
| int r; |
| |
| assert(m); |
| assert(link); |
| assert(link->ifname); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { |
| link_unref(link); |
| return 1; |
| } |
| |
| r = sd_rtnl_message_get_errno(m); |
| if (r < 0) |
| log_struct_link(LOG_WARNING, link, |
| "MESSAGE=%s: could not set MTU: %s", |
| link->ifname, strerror(-r), |
| "ERRNO=%d", -r, |
| NULL); |
| |
| link_unref(link); |
| |
| return 1; |
| } |
| |
| static int link_set_mtu(Link *link, uint32_t mtu) { |
| _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| |
| log_debug_link(link, "setting MTU: %" PRIu32, mtu); |
| |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &req, |
| RTM_SETLINK, link->ifindex); |
| if (r < 0) { |
| log_error_link(link, "Could not allocate RTM_SETLINK message"); |
| return r; |
| } |
| |
| r = sd_rtnl_message_append_u32(req, IFLA_MTU, mtu); |
| if (r < 0) { |
| log_error_link(link, "Could not append MTU: %s", strerror(-r)); |
| return r; |
| } |
| |
| r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL); |
| if (r < 0) { |
| log_error_link(link, |
| "Could not send rtnetlink message: %s", strerror(-r)); |
| return r; |
| } |
| |
| link_unref(link); |
| |
| return 0; |
| } |
| |
| static int dhcp_lease_lost(Link *link) { |
| _cleanup_address_free_ Address *address = NULL; |
| _cleanup_route_free_ Route *route_gw = NULL; |
| _cleanup_route_free_ Route *route = NULL; |
| struct in_addr addr; |
| struct in_addr netmask; |
| struct in_addr gateway; |
| unsigned prefixlen; |
| int r; |
| |
| assert(link); |
| assert(link->dhcp_lease); |
| |
| log_warning_link(link, "DHCP lease lost"); |
| |
| r = address_new_dynamic(&address); |
| if (r >= 0) { |
| r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); |
| if (r >= 0) { |
| r = route_new_dynamic(&route_gw); |
| if (r >= 0) { |
| route_gw->family = AF_INET; |
| route_gw->dst_addr.in = gateway; |
| route_gw->dst_prefixlen = 32; |
| route_gw->scope = RT_SCOPE_LINK; |
| |
| route_drop(route_gw, link, &route_drop_handler); |
| link_ref(link); |
| } |
| |
| r = route_new_dynamic(&route); |
| if (r >= 0) { |
| route->family = AF_INET; |
| route->in_addr.in = gateway; |
| |
| route_drop(route, link, &route_drop_handler); |
| link_ref(link); |
| } |
| } |
| |
| sd_dhcp_lease_get_address(link->dhcp_lease, &addr); |
| sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); |
| prefixlen = net_netmask_to_prefixlen(&netmask); |
| |
| address->family = AF_INET; |
| address->in_addr.in = addr; |
| address->prefixlen = prefixlen; |
| |
| address_drop(address, link, &address_drop_handler); |
| link_ref(link); |
| } |
| |
| if (link->network->dhcp_mtu) { |
| uint16_t mtu; |
| |
| r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu); |
| if (r >= 0 && link->original_mtu != mtu) { |
| r = link_set_mtu(link, link->original_mtu); |
| if (r < 0) { |
| log_warning_link(link, "DHCP error: could not reset MTU"); |
| link_enter_failed(link); |
| return r; |
| } |
| } |
| } |
| |
| if (link->network->dhcp_hostname) { |
| const char *hostname = NULL; |
| |
| r = sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname); |
| if (r >= 0 && hostname) { |
| r = link_set_hostname(link, ""); |
| if (r < 0) |
| log_error_link(link, "Failed to reset transient hostname"); |
| } |
| } |
| |
| link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); |
| |
| return 0; |
| } |
| |
| static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { |
| sd_dhcp_lease *lease; |
| struct in_addr address; |
| struct in_addr netmask; |
| struct in_addr gateway; |
| unsigned prefixlen; |
| int r; |
| |
| assert(client); |
| assert(link); |
| |
| r = sd_dhcp_client_get_lease(client, &lease); |
| if (r < 0) { |
| log_warning_link(link, "DHCP error: no lease: %s", |
| strerror(-r)); |
| return r; |
| } |
| |
| r = sd_dhcp_lease_get_address(lease, &address); |
| if (r < 0) { |
| log_warning_link(link, "DHCP error: no address: %s", |
| strerror(-r)); |
| return r; |
| } |
| |
| r = sd_dhcp_lease_get_netmask(lease, &netmask); |
| if (r < 0) { |
| log_warning_link(link, "DHCP error: no netmask: %s", |
| strerror(-r)); |
| return r; |
| } |
| |
| prefixlen = net_netmask_to_prefixlen(&netmask); |
| |
| r = sd_dhcp_lease_get_router(lease, &gateway); |
| if (r < 0 && r != -ENOENT) { |
| log_warning_link(link, "DHCP error: %s", strerror(-r)); |
| return r; |
| } |
| |
| if (r >= 0) |
| log_struct_link(LOG_INFO, link, |
| "MESSAGE=%*s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", |
| IFNAMSIZ, |
| link->ifname, |
| ADDRESS_FMT_VAL(address), |
| prefixlen, |
| ADDRESS_FMT_VAL(gateway), |
| "ADDRESS=%u.%u.%u.%u", |
| ADDRESS_FMT_VAL(address), |
| "PREFIXLEN=%u", |
| prefixlen, |
| "GATEWAY=%u.%u.%u.%u", |
| ADDRESS_FMT_VAL(gateway), |
| NULL); |
| else |
| log_struct_link(LOG_INFO, link, |
| "MESSAGE=%*s: DHCPv4 address %u.%u.%u.%u/%u", |
| IFNAMSIZ, |
| link->ifname, |
| ADDRESS_FMT_VAL(address), |
| prefixlen, |
| "ADDRESS=%u.%u.%u.%u", |
| ADDRESS_FMT_VAL(address), |
| "PREFIXLEN=%u", |
| prefixlen, |
| NULL); |
| |
| link->dhcp_lease = lease; |
| |
| if (link->network->dhcp_mtu) { |
| uint16_t mtu; |
| |
| r = sd_dhcp_lease_get_mtu(lease, &mtu); |
| if (r >= 0) { |
| r = link_set_mtu(link, mtu); |
| if (r < 0) |
| log_error_link(link, "Failed to set MTU " |
| "to %" PRIu16, mtu); |
| } |
| } |
| |
| if (link->network->dhcp_hostname) { |
| const char *hostname; |
| |
| r = sd_dhcp_lease_get_hostname(lease, &hostname); |
| if (r >= 0) { |
| r = link_set_hostname(link, hostname); |
| if (r < 0) |
| log_error_link(link, "Failed to set transient hostname " |
| "to '%s'", hostname); |
| } |
| } |
| |
| link_enter_set_addresses(link); |
| |
| return 0; |
| } |
| |
| static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) { |
| Link *link = userdata; |
| int r = 0; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->manager); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return; |
| |
| switch (event) { |
| case DHCP_EVENT_NO_LEASE: |
| log_debug_link(link, "IP address in use."); |
| break; |
| case DHCP_EVENT_EXPIRED: |
| case DHCP_EVENT_STOP: |
| case DHCP_EVENT_IP_CHANGE: |
| if (link->network->dhcp_critical) { |
| log_error_link(link, "DHCPv4 connection considered system critical, " |
| "ignoring request to reconfigure it."); |
| return; |
| } |
| |
| if (link->dhcp_lease) { |
| r = dhcp_lease_lost(link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return; |
| } |
| } |
| |
| if (event == DHCP_EVENT_IP_CHANGE) { |
| r = dhcp_lease_acquired(client, link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return; |
| } |
| } |
| |
| if (event == DHCP_EVENT_EXPIRED && link->network->ipv4ll) { |
| if (!sd_ipv4ll_is_running(link->ipv4ll)) |
| r = sd_ipv4ll_start(link->ipv4ll); |
| else if (ipv4ll_is_bound(link->ipv4ll)) |
| r = ipv4ll_address_update(link, false); |
| if (r < 0) { |
| link_enter_failed(link); |
| return; |
| } |
| } |
| |
| break; |
| case DHCP_EVENT_IP_ACQUIRE: |
| r = dhcp_lease_acquired(client, link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return; |
| } |
| if (link->ipv4ll) { |
| if (ipv4ll_is_bound(link->ipv4ll)) |
| r = ipv4ll_address_update(link, true); |
| else |
| r = sd_ipv4ll_stop(link->ipv4ll); |
| if (r < 0) { |
| link_enter_failed(link); |
| return; |
| } |
| } |
| break; |
| default: |
| if (event < 0) |
| log_warning_link(link, "DHCP error: %s", strerror(-event)); |
| else |
| log_warning_link(link, "DHCP unknown event: %d", event); |
| break; |
| } |
| |
| return; |
| } |
| |
| static int ipv4ll_address_update(Link *link, bool deprecate) { |
| int r; |
| struct in_addr addr; |
| |
| assert(link); |
| |
| r = sd_ipv4ll_get_address(link->ipv4ll, &addr); |
| if (r >= 0) { |
| _cleanup_address_free_ Address *address = NULL; |
| |
| log_debug_link(link, "IPv4 link-local %s %u.%u.%u.%u", |
| deprecate ? "deprecate" : "approve", |
| ADDRESS_FMT_VAL(addr)); |
| |
| r = address_new_dynamic(&address); |
| if (r < 0) { |
| log_error_link(link, "Could not allocate address: %s", strerror(-r)); |
| return r; |
| } |
| |
| address->family = AF_INET; |
| address->in_addr.in = addr; |
| address->prefixlen = 16; |
| address->scope = RT_SCOPE_LINK; |
| address->cinfo.ifa_prefered = deprecate ? 0 : CACHE_INFO_INFINITY_LIFE_TIME; |
| address->broadcast.s_addr = address->in_addr.in.s_addr | htonl(0xfffffffflu >> address->prefixlen); |
| |
| address_update(address, link, &address_update_handler); |
| link_ref(link); |
| } |
| |
| return 0; |
| |
| } |
| |
| static int ipv4ll_address_lost(Link *link) { |
| int r; |
| struct in_addr addr; |
| |
| assert(link); |
| |
| r = sd_ipv4ll_get_address(link->ipv4ll, &addr); |
| if (r >= 0) { |
| _cleanup_address_free_ Address *address = NULL; |
| _cleanup_route_free_ Route *route = NULL; |
| |
| log_debug_link(link, "IPv4 link-local release %u.%u.%u.%u", |
| ADDRESS_FMT_VAL(addr)); |
| |
| r = address_new_dynamic(&address); |
| if (r < 0) { |
| log_error_link(link, "Could not allocate address: %s", strerror(-r)); |
| return r; |
| } |
| |
| address->family = AF_INET; |
| address->in_addr.in = addr; |
| address->prefixlen = 16; |
| address->scope = RT_SCOPE_LINK; |
| |
| address_drop(address, link, &address_drop_handler); |
| link_ref(link); |
| |
| r = route_new_dynamic(&route); |
| if (r < 0) { |
| log_error_link(link, "Could not allocate route: %s", |
| strerror(-r)); |
| return r; |
| } |
| |
| route->family = AF_INET; |
| route->scope = RT_SCOPE_LINK; |
| route->metrics = 99; |
| |
| route_drop(route, link, &route_drop_handler); |
| link_ref(link); |
| } |
| |
| return 0; |
| } |
| |
| static bool ipv4ll_is_bound(sd_ipv4ll *ll) { |
| int r; |
| struct in_addr addr; |
| |
| assert(ll); |
| |
| r = sd_ipv4ll_get_address(ll, &addr); |
| if (r < 0) |
| return false; |
| return true; |
| } |
| |
| static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) { |
| struct in_addr address; |
| int r; |
| |
| assert(ll); |
| assert(link); |
| |
| r = sd_ipv4ll_get_address(ll, &address); |
| if (r < 0) |
| return r; |
| |
| log_struct_link(LOG_INFO, link, |
| "MESSAGE=%*s: IPv4 link-local address %u.%u.%u.%u", |
| IFNAMSIZ, |
| link->ifname, |
| ADDRESS_FMT_VAL(address), |
| NULL); |
| |
| link_enter_set_addresses(link); |
| |
| return 0; |
| } |
| |
| static void ipv4ll_handler(sd_ipv4ll *ll, int event, void *userdata){ |
| Link *link = userdata; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->manager); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return; |
| |
| switch(event) { |
| case IPV4LL_EVENT_STOP: |
| case IPV4LL_EVENT_CONFLICT: |
| r = ipv4ll_address_lost(link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return; |
| } |
| break; |
| case IPV4LL_EVENT_BIND: |
| r = ipv4ll_address_claimed(ll, link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return; |
| } |
| break; |
| default: |
| if (event < 0) |
| log_warning_link(link, "IPv4 link-local error: %s", strerror(-event)); |
| else |
| log_warning_link(link, "IPv4 link-local unknown event: %d", event); |
| break; |
| } |
| } |
| |
| static int link_acquire_conf(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->manager); |
| assert(link->manager->event); |
| |
| if (link->network->ipv4ll) { |
| assert(link->ipv4ll); |
| |
| log_debug_link(link, "acquiring IPv4 link-local address"); |
| |
| r = sd_ipv4ll_start(link->ipv4ll); |
| if (r < 0) { |
| log_warning_link(link, "could not acquire IPv4 " |
| "link-local address"); |
| return r; |
| } |
| } |
| |
| if (link->network->dhcp) { |
| assert(link->dhcp_client); |
| |
| log_debug_link(link, "acquiring DHCPv4 lease"); |
| |
| r = sd_dhcp_client_start(link->dhcp_client); |
| if (r < 0) { |
| log_warning_link(link, "could not acquire DHCPv4 " |
| "lease"); |
| return r; |
| } |
| } |
| |
| return 0; |
| } |
| |
| bool link_has_carrier(unsigned flags, uint8_t operstate) { |
| /* see Documentation/networking/operstates.txt in the kernel sources */ |
| |
| if (operstate == IF_OPER_UP) |
| return true; |
| |
| if (operstate == IF_OPER_UNKNOWN) |
| /* operstate may not be implemented, so fall back to flags */ |
| if ((flags & IFF_LOWER_UP) && !(flags & IFF_DORMANT)) |
| return true; |
| |
| return false; |
| } |
| |
| #define FLAG_STRING(string, flag, old, new) \ |
| (((old ^ new) & flag) \ |
| ? ((old & flag) ? (" -" string) : (" +" string)) \ |
| : "") |
| |
| static int link_update_flags(Link *link, sd_rtnl_message *m) { |
| unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags; |
| uint8_t operstate; |
| bool carrier_gained = false, carrier_lost = false; |
| int r; |
| |
| assert(link); |
| |
| r = sd_rtnl_message_link_get_flags(m, &flags); |
| if (r < 0) { |
| log_warning_link(link, "Could not get link flags"); |
| return r; |
| } |
| |
| r = sd_rtnl_message_read_u8(m, IFLA_OPERSTATE, &operstate); |
| if (r < 0) |
| /* if we got a message without operstate, take it to mean |
| the state was unchanged */ |
| operstate = link->kernel_operstate; |
| |
| if ((link->flags == flags) && (link->kernel_operstate == operstate)) |
| return 0; |
| |
| if (link->flags != flags) { |
| log_debug_link(link, "flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", |
| FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), |
| FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), |
| FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), |
| FLAG_STRING("UP", IFF_UP, link->flags, flags), |
| FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), |
| FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), |
| FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), |
| FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), |
| FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), |
| FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), |
| FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), |
| FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), |
| FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), |
| FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), |
| FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), |
| FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), |
| FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), |
| FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), |
| FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); |
| |
| unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | |
| IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | |
| IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | |
| IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | |
| IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | |
| IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); |
| unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); |
| unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); |
| |
| /* link flags are currently at most 18 bits, let's align to printing 20 */ |
| if (unknown_flags_added) |
| log_debug_link(link, "unknown link flags gained: %#.5x (ignoring)", |
| unknown_flags_added); |
| |
| if (unknown_flags_removed) |
| log_debug_link(link, "unknown link flags lost: %#.5x (ignoring)", |
| unknown_flags_removed); |
| } |
| |
| carrier_gained = !link_has_carrier(link->flags, link->kernel_operstate) && |
| link_has_carrier(flags, operstate); |
| carrier_lost = link_has_carrier(link->flags, link->kernel_operstate) && |
| !link_has_carrier(flags, operstate); |
| |
| link->flags = flags; |
| link->kernel_operstate = operstate; |
| |
| link_save(link); |
| |
| if (link->state == LINK_STATE_FAILED || |
| link->state == LINK_STATE_UNMANAGED) |
| return 0; |
| |
| if (carrier_gained) { |
| log_info_link(link, "gained carrier"); |
| |
| if (link->network) { |
| r = link_acquire_conf(link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return r; |
| } |
| } |
| } else if (carrier_lost) { |
| log_info_link(link, "lost carrier"); |
| |
| r = link_stop_clients(link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return r; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
| Link *link = userdata; |
| int r; |
| |
| assert(link); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { |
| link_unref(link); |
| return 1; |
| } |
| |
| r = sd_rtnl_message_get_errno(m); |
| if (r < 0) { |
| /* we warn but don't fail the link, as it may |
| be brought up later */ |
| log_struct_link(LOG_WARNING, link, |
| "MESSAGE=%*s: could not bring up interface: %s", |
| IFNAMSIZ, |
| link->ifname, strerror(-r), |
| "ERRNO=%d", -r, |
| NULL); |
| } |
| |
| link_unref(link); |
| |
| return 1; |
| } |
| |
| static int link_up(Link *link) { |
| _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| |
| log_debug_link(link, "bringing link up"); |
| |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &req, |
| RTM_SETLINK, link->ifindex); |
| if (r < 0) { |
| log_error_link(link, "Could not allocate RTM_SETLINK message"); |
| return r; |
| } |
| |
| r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP); |
| if (r < 0) { |
| log_error_link(link, "Could not set link flags: %s", strerror(-r)); |
| return r; |
| } |
| |
| r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL); |
| if (r < 0) { |
| log_error_link(link, |
| "Could not send rtnetlink message: %s", strerror(-r)); |
| return r; |
| } |
| |
| link_ref(link); |
| |
| return 0; |
| } |
| |
| static int link_enslaved(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->state == LINK_STATE_ENSLAVING); |
| assert(link->network); |
| |
| if (!(link->flags & IFF_UP)) { |
| r = link_up(link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return r; |
| } |
| } |
| |
| if (!link->network->dhcp && !link->network->ipv4ll) |
| return link_enter_set_addresses(link); |
| |
| return 0; |
| } |
| |
| static int enslave_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
| Link *link = userdata; |
| int r; |
| |
| assert(link); |
| assert(IN_SET(link->state, LINK_STATE_ENSLAVING, LINK_STATE_FAILED, |
| LINK_STATE_LINGER)); |
| assert(link->network); |
| |
| link->enslaving --; |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { |
| link_unref(link); |
| return 1; |
| } |
| |
| r = sd_rtnl_message_get_errno(m); |
| if (r < 0) { |
| log_struct_link(LOG_ERR, link, |
| "MESSAGE=%*s: could not enslave: %s", |
| IFNAMSIZ, |
| link->ifname, strerror(-r), |
| "ERRNO=%d", -r, |
| NULL); |
| link_enter_failed(link); |
| link_unref(link); |
| return 1; |
| } |
| |
| log_debug_link(link, "enslaved"); |
| |
| if (link->enslaving == 0) |
| link_enslaved(link); |
| |
| link_unref(link); |
| |
| return 1; |
| } |
| |
| static int link_enter_enslave(Link *link) { |
| NetDev *vlan, *macvlan; |
| Iterator i; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->state == LINK_STATE_INITIALIZING); |
| |
| link->state = LINK_STATE_ENSLAVING; |
| |
| link_save(link); |
| |
| if (!link->network->bridge && |
| !link->network->bond && |
| !link->network->tunnel && |
| hashmap_isempty(link->network->vlans) && |
| hashmap_isempty(link->network->macvlans)) |
| return link_enslaved(link); |
| |
| if (link->network->bond) { |
| log_struct_link(LOG_DEBUG, link, |
| "MESSAGE=%*s: enslaving by '%s'", |
| IFNAMSIZ, |
| link->ifname, link->network->bond->ifname, |
| NETDEV(link->network->bond), |
| NULL); |
| |
| r = netdev_enslave(link->network->bond, link, &enslave_handler); |
| if (r < 0) { |
| log_struct_link(LOG_WARNING, link, |
| "MESSAGE=%*s: could not enslave by '%s': %s", |
| IFNAMSIZ, |
| link->ifname, link->network->bond->ifname, strerror(-r), |
| NETDEV(link->network->bond), |
| NULL); |
| link_enter_failed(link); |
| return r; |
| } |
| |
| link_ref(link); |
| link->enslaving ++; |
| } |
| |
| if (link->network->bridge) { |
| log_struct_link(LOG_DEBUG, link, |
| "MESSAGE=%*s: enslaving by '%s'", |
| IFNAMSIZ, |
| link->ifname, link->network->bridge->ifname, |
| NETDEV(link->network->bridge), |
| NULL); |
| |
| r = netdev_enslave(link->network->bridge, link, &enslave_handler); |
| if (r < 0) { |
| log_struct_link(LOG_WARNING, link, |
| "MESSAGE=%*s: could not enslave by '%s': %s", |
| IFNAMSIZ, |
| link->ifname, link->network->bridge->ifname, strerror(-r), |
| NETDEV(link->network->bridge), |
| NULL); |
| link_enter_failed(link); |
| return r; |
| } |
| |
| link_ref(link); |
| link->enslaving ++; |
| } |
| |
| if (link->network->tunnel) { |
| log_struct_link(LOG_DEBUG, link, |
| "MESSAGE=%*s: enslaving by '%s'", |
| IFNAMSIZ, |
| link->ifname, link->network->tunnel->ifname, |
| NETDEV(link->network->tunnel), |
| NULL); |
| |
| r = netdev_enslave(link->network->tunnel, link, &enslave_handler); |
| if (r < 0) { |
| log_struct_link(LOG_WARNING, link, |
| "MESSAGE=%*s: could not enslave by '%s': %s", |
| IFNAMSIZ, |
| link->ifname, link->network->tunnel->ifname, strerror(-r), |
| NETDEV(link->network->tunnel), |
| NULL); |
| link_enter_failed(link); |
| return r; |
| } |
| |
| link_ref(link); |
| link->enslaving ++; |
| } |
| |
| HASHMAP_FOREACH(vlan, link->network->vlans, i) { |
| log_struct_link(LOG_DEBUG, link, |
| "MESSAGE=%*s: enslaving by '%s'", |
| IFNAMSIZ, |
| link->ifname, vlan->ifname, NETDEV(vlan), NULL); |
| |
| r = netdev_enslave(vlan, link, &enslave_handler); |
| if (r < 0) { |
| log_struct_link(LOG_WARNING, link, |
| "MESSAGE=%*s: could not enslave by '%s': %s", |
| IFNAMSIZ, |
| link->ifname, vlan->ifname, strerror(-r), |
| NETDEV(vlan), NULL); |
| link_enter_failed(link); |
| return r; |
| } |
| |
| link_ref(link); |
| link->enslaving ++; |
| } |
| |
| HASHMAP_FOREACH(macvlan, link->network->macvlans, i) { |
| log_struct_link(LOG_DEBUG, link, |
| "MESSAGE=%*s: enslaving by '%s'", |
| IFNAMSIZ, |
| link->ifname, macvlan->ifname, NETDEV(macvlan), NULL); |
| |
| r = netdev_enslave(macvlan, link, &enslave_handler); |
| if (r < 0) { |
| log_struct_link(LOG_WARNING, link, |
| "MESSAGE=%*s: could not enslave by '%s': %s", |
| IFNAMSIZ, |
| link->ifname, macvlan->ifname, strerror(-r), |
| NETDEV(macvlan), NULL); |
| link_enter_failed(link); |
| return r; |
| } |
| |
| link_ref(link); |
| link->enslaving ++; |
| } |
| |
| return 0; |
| } |
| |
| static int link_configure(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->state == LINK_STATE_INITIALIZING); |
| |
| if (link->network->ipv4ll) { |
| uint8_t seed[8]; |
| |
| r = sd_ipv4ll_new(&link->ipv4ll); |
| if (r < 0) |
| return r; |
| |
| if (link->udev_device) { |
| r = net_get_unique_predictable_data(link->udev_device, seed); |
| if (r >= 0) { |
| r = sd_ipv4ll_set_address_seed(link->ipv4ll, seed); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0); |
| if (r < 0) |
| return r; |
| |
| r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac); |
| if (r < 0) |
| return r; |
| |
| r = sd_ipv4ll_set_index(link->ipv4ll, link->ifindex); |
| if (r < 0) |
| return r; |
| |
| r = sd_ipv4ll_set_callback(link->ipv4ll, ipv4ll_handler, link); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->dhcp) { |
| r = sd_dhcp_client_new(&link->dhcp_client); |
| if (r < 0) |
| return r; |
| |
| r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0); |
| if (r < 0) |
| return r; |
| |
| r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac); |
| if (r < 0) |
| return r; |
| |
| r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex); |
| if (r < 0) |
| return r; |
| |
| r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp_handler, link); |
| if (r < 0) |
| return r; |
| |
| if (link->network->dhcp_mtu) { |
| r = sd_dhcp_client_set_request_option(link->dhcp_client, 26); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| if (link_has_carrier(link->flags, link->kernel_operstate)) { |
| r = link_acquire_conf(link); |
| if (r < 0) |
| return r; |
| } |
| |
| return link_enter_enslave(link); |
| } |
| |
| int link_initialized(Link *link, struct udev_device *device) { |
| Network *network; |
| int r; |
| |
| assert(link); |
| assert(link->ifname); |
| assert(link->manager); |
| |
| if (link->state != LINK_STATE_INITIALIZING) |
| return 0; |
| |
| if (device) |
| link->udev_device = udev_device_ref(device); |
| |
| log_debug_link(link, "udev initialized link"); |
| |
| r = network_get(link->manager, device, link->ifname, &link->mac, &network); |
| if (r == -ENOENT) { |
| link_enter_unmanaged(link); |
| return 0; |
| } else if (r < 0) |
| return r; |
| |
| r = network_apply(link->manager, network, link); |
| if (r < 0) |
| return r; |
| |
| r = link_configure(link); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) { |
| Manager *m = userdata; |
| Link *link = NULL; |
| uint16_t type; |
| _cleanup_address_free_ Address *address = NULL; |
| Address *ad; |
| char buf[INET6_ADDRSTRLEN]; |
| bool address_dropped = false; |
| int r, ifindex; |
| |
| assert(rtnl); |
| assert(message); |
| assert(m); |
| |
| r = sd_rtnl_message_get_type(message, &type); |
| if (r < 0) { |
| log_warning("rtnl: could not get message type"); |
| return 0; |
| } |
| |
| r = sd_rtnl_message_addr_get_ifindex(message, &ifindex); |
| if (r < 0 || ifindex <= 0) { |
| log_warning("rtnl: received address message without valid ifindex, ignoring"); |
| return 0; |
| } else { |
| r = link_get(m, ifindex, &link); |
| if (r < 0 || !link) { |
| log_warning("rtnl: received address for a nonexistent link, ignoring"); |
| return 0; |
| } |
| } |
| |
| r = address_new_dynamic(&address); |
| if (r < 0) |
| return 0; |
| |
| r = sd_rtnl_message_addr_get_family(message, &address->family); |
| if (r < 0 || !IN_SET(address->family, AF_INET, AF_INET6)) { |
| log_warning_link(link, "rtnl: received address with invalid family, ignoring"); |
| return 0; |
| } |
| |
| r = sd_rtnl_message_addr_get_prefixlen(message, &address->prefixlen); |
| if (r < 0) { |
| log_warning_link(link, "rtnl: received address with invalid prefixlen, ignoring"); |
| return 0; |
| } |
| |
| r = sd_rtnl_message_addr_get_scope(message, &address->scope); |
| if (r < 0) { |
| log_warning_link(link, "rtnl: received address with invalid scope, ignoring"); |
| return 0; |
| } |
| |
| switch (address->family) { |
| case AF_INET: |
| r = sd_rtnl_message_read_in_addr(message, IFA_LOCAL, &address->in_addr.in); |
| if (r < 0) { |
| log_warning_link(link, "rtnl: received address without valid address, ignoring"); |
| return 0; |
| } |
| |
| break; |
| |
| case AF_INET6: |
| r = sd_rtnl_message_read_in6_addr(message, IFA_ADDRESS, &address->in_addr.in6); |
| if (r < 0) { |
| log_warning_link(link, "rtnl: received address without valid address, ignoring"); |
| return 0; |
| } |
| |
| break; |
| |
| default: |
| assert_not_reached("invalid address family"); |
| } |
| |
| if (!inet_ntop(address->family, &address->in_addr, buf, INET6_ADDRSTRLEN)) { |
| log_warning_link(link, "could not print address"); |
| return 0; |
| } |
| |
| LIST_FOREACH(addresses, ad, link->addresses) { |
| if (address_equal(ad, address)) { |
| LIST_REMOVE(addresses, link->addresses, ad); |
| |
| address_free(ad); |
| |
| address_dropped = true; |
| |
| break; |
| } |
| } |
| |
| switch (type) { |
| case RTM_NEWADDR: |
| if (!address_dropped) |
| log_debug_link(link, "added address: %s/%u", buf, |
| address->prefixlen); |
| |
| LIST_PREPEND(addresses, link->addresses, address); |
| address = NULL; |
| |
| link_save(link); |
| |
| break; |
| case RTM_DELADDR: |
| if (address_dropped) { |
| log_debug_link(link, "removed address: %s/%u", buf, |
| address->prefixlen); |
| |
| link_save(link); |
| } |
| |
| break; |
| default: |
| assert_not_reached("Received invalid RTNL message type"); |
| } |
| |
| return 1; |
| } |
| |
| static int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
| Link *link = userdata; |
| int r; |
| |
| assert(rtnl); |
| assert(m); |
| assert(link); |
| |
| for (; m; m = sd_rtnl_message_next(m)) { |
| r = sd_rtnl_message_get_errno(m); |
| if (r < 0) { |
| log_debug_link(link, "getting address failed: %s", strerror(-r)); |
| continue; |
| } |
| |
| r = link_rtnl_process_address(rtnl, m, link->manager); |
| if (r < 0) |
| log_warning_link(link, "could not process address: %s", strerror(-r)); |
| } |
| |
| return 1; |
| } |
| |
| int link_add(Manager *m, sd_rtnl_message *message, Link **ret) { |
| Link *link; |
| _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
| _cleanup_udev_device_unref_ struct udev_device *device = NULL; |
| char ifindex_str[2 + DECIMAL_STR_MAX(int)]; |
| int r; |
| |
| assert(m); |
| assert(m->rtnl); |
| assert(message); |
| assert(ret); |
| |
| r = link_new(m, message, ret); |
| if (r < 0) |
| return r; |
| |
| link = *ret; |
| |
| log_debug_link(link, "link %"PRIu64" added", link->ifindex); |
| |
| r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, link->ifindex, 0); |
| if (r < 0) |
| return r; |
| |
| r = sd_rtnl_call_async(m->rtnl, req, link_get_address_handler, link, 0, NULL); |
| if (r < 0) |
| return r; |
| |
| if (detect_container(NULL) <= 0) { |
| /* not in a container, udev will be around */ |
| sprintf(ifindex_str, "n%"PRIu64, link->ifindex); |
| device = udev_device_new_from_device_id(m->udev, ifindex_str); |
| if (!device) { |
| log_warning_link(link, "could not find udev device"); |
| return -errno; |
| } |
| |
| if (udev_device_get_is_initialized(device) <= 0) { |
| /* not yet ready */ |
| log_debug_link(link, "udev initializing link..."); |
| return 0; |
| } |
| } |
| |
| r = link_initialized(link, device); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| int link_update(Link *link, sd_rtnl_message *m) { |
| struct ether_addr mac; |
| char *ifname; |
| int r; |
| |
| assert(link); |
| assert(link->ifname); |
| assert(m); |
| |
| if (link->state == LINK_STATE_LINGER) { |
| link_ref(link); |
| log_info_link(link, "link readded"); |
| link->state = LINK_STATE_ENSLAVING; |
| } |
| |
| r = sd_rtnl_message_read_string(m, IFLA_IFNAME, &ifname); |
| if (r >= 0 && !streq(ifname, link->ifname)) { |
| log_info_link(link, "renamed to %s", ifname); |
| |
| free(link->ifname); |
| link->ifname = strdup(ifname); |
| if (!link->ifname) |
| return -ENOMEM; |
| } |
| |
| if (!link->original_mtu) { |
| r = sd_rtnl_message_read_u16(m, IFLA_MTU, &link->original_mtu); |
| if (r >= 0) |
| log_debug_link(link, "saved original MTU: %" |
| PRIu16, link->original_mtu); |
| } |
| |
| /* The kernel may broadcast NEWLINK messages without the MAC address |
| set, simply ignore them. */ |
| r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &mac); |
| if (r >= 0) { |
| if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN)) { |
| |
| memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN); |
| |
| log_debug_link(link, "MAC address: " |
| "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", |
| mac.ether_addr_octet[0], |
| mac.ether_addr_octet[1], |
| mac.ether_addr_octet[2], |
| mac.ether_addr_octet[3], |
| mac.ether_addr_octet[4], |
| mac.ether_addr_octet[5]); |
| |
| if (link->ipv4ll) { |
| r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac); |
| if (r < 0) { |
| log_warning_link(link, "Could not update MAC " |
| "address in IPv4LL client: %s", |
| strerror(-r)); |
| return r; |
| } |
| } |
| |
| if (link->dhcp_client) { |
| r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac); |
| if (r < 0) { |
| log_warning_link(link, "Could not update MAC " |
| "address in DHCP client: %s", |
| strerror(-r)); |
| return r; |
| } |
| } |
| } |
| } |
| |
| return link_update_flags(link, m); |
| } |
| |
| static void serialize_addresses(FILE *f, const char *key, Address *address) { |
| Address *ad; |
| |
| assert(f); |
| assert(key); |
| |
| if (!address) |
| return; |
| |
| fprintf(f, "%s=", key); |
| |
| LIST_FOREACH(addresses, ad, address) { |
| char buf[INET6_ADDRSTRLEN]; |
| |
| if (inet_ntop(ad->family, &ad->in_addr, buf, INET6_ADDRSTRLEN)) |
| fprintf(f, "%s%s", buf, (ad->addresses_next) ? " ": ""); |
| } |
| |
| fputs("\n", f); |
| } |
| |
| static void link_update_operstate(Link *link) { |
| |
| assert(link); |
| |
| if (link->kernel_operstate == IF_OPER_DORMANT) |
| link->operstate = LINK_OPERSTATE_DORMANT; |
| else if (link_has_carrier(link->flags, link->kernel_operstate)) { |
| Address *address; |
| uint8_t scope = RT_SCOPE_NOWHERE; |
| |
| /* if we have carrier, check what addresses we have */ |
| LIST_FOREACH(addresses, address, link->addresses) { |
| if (address->scope < scope) |
| scope = address->scope; |
| } |
| |
| if (scope < RT_SCOPE_SITE) |
| /* universally accessible addresses found */ |
| link->operstate = LINK_OPERSTATE_ROUTABLE; |
| else if (scope < RT_SCOPE_HOST) |
| /* only link or site local addresses found */ |
| link->operstate = LINK_OPERSTATE_DEGRADED; |
| else |
| /* no useful addresses found */ |
| link->operstate = LINK_OPERSTATE_CARRIER; |
| } else |
| link->operstate = LINK_OPERSTATE_UNKNOWN; |
| } |
| |
| int link_save(Link *link) { |
| _cleanup_free_ char *temp_path = NULL; |
| _cleanup_fclose_ FILE *f = NULL; |
| const char *admin_state, *oper_state; |
| int r; |
| |
| assert(link); |
| assert(link->state_file); |
| assert(link->lease_file); |
| assert(link->manager); |
| |
| link_update_operstate(link); |
| |
| r = manager_save(link->manager); |
| if (r < 0) |
| return r; |
| |
| if (link->state == LINK_STATE_LINGER) { |
| unlink(link->state_file); |
| return 0; |
| } |
| |
| admin_state = link_state_to_string(link->state); |
| assert(admin_state); |
| |
| oper_state = link_operstate_to_string(link->operstate); |
| assert(oper_state); |
| |
| r = fopen_temporary(link->state_file, &f, &temp_path); |
| if (r < 0) |
| goto finish; |
| |
| fchmod(fileno(f), 0644); |
| |
| fprintf(f, |
| "# This is private data. Do not parse.\n" |
| "ADMIN_STATE=%s\n" |
| "OPER_STATE=%s\n" |
| "FLAGS=%u\n", |
| admin_state, oper_state, link->flags); |
| |
| if (link->network) { |
| serialize_addresses(f, "DNS", link->network->dns); |
| serialize_addresses(f, "NTP", link->network->ntp); |
| } |
| |
| if (link->dhcp_lease) { |
| r = dhcp_lease_save(link->dhcp_lease, link->lease_file); |
| if (r < 0) |
| goto finish; |
| |
| fprintf(f, |
| "DHCP_LEASE=%s\n" |
| "DHCP_USE_DNS=%s\n" |
| "DHCP_USE_NTP=%s\n", |
| link->lease_file, |
| yes_no(link->network->dhcp_dns), |
| yes_no(link->network->dhcp_ntp)); |
| } else |
| unlink(link->lease_file); |
| |
| fflush(f); |
| |
| if (ferror(f) || rename(temp_path, link->state_file) < 0) { |
| r = -errno; |
| unlink(link->state_file); |
| unlink(temp_path); |
| } |
| |
| finish: |
| if (r < 0) |
| log_error_link(link, "Failed to save link data to %s: %s", link->state_file, strerror(-r)); |
| |
| return r; |
| } |
| |
| static const char* const link_state_table[_LINK_STATE_MAX] = { |
| [LINK_STATE_INITIALIZING] = "initializing", |
| [LINK_STATE_ENSLAVING] = "configuring", |
| [LINK_STATE_SETTING_ADDRESSES] = "configuring", |
| [LINK_STATE_SETTING_ROUTES] = "configuring", |
| [LINK_STATE_CONFIGURED] = "configured", |
| [LINK_STATE_UNMANAGED] = "unmanaged", |
| [LINK_STATE_FAILED] = "failed", |
| [LINK_STATE_LINGER] = "linger", |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); |
| |
| static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = { |
| [LINK_OPERSTATE_UNKNOWN] = "unknown", |
| [LINK_OPERSTATE_DORMANT] = "dormant", |
| [LINK_OPERSTATE_CARRIER] = "carrier", |
| [LINK_OPERSTATE_DEGRADED] = "degraded", |
| [LINK_OPERSTATE_ROUTABLE] = "routable", |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState); |