diff options
Diffstat (limited to 'src/network/networkd-link.c')
| -rw-r--r-- | src/network/networkd-link.c | 3547 |
1 files changed, 0 insertions, 3547 deletions
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c deleted file mode 100644 index aefe7335b9..0000000000 --- a/src/network/networkd-link.c +++ /dev/null @@ -1,3547 +0,0 @@ -/*** - 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 <unistd.h> - -#include "alloc-util.h" -#include "bus-util.h" -#include "dhcp-lease-internal.h" -#include "fd-util.h" -#include "fileio.h" -#include "netlink-util.h" -#include "network-internal.h" -#include "networkd-lldp-tx.h" -#include "networkd-ndisc.h" -#include "networkd.h" -#include "set.h" -#include "socket-util.h" -#include "stdio-util.h" -#include "string-table.h" -#include "udev-util.h" -#include "util.h" -#include "virt.h" - -static bool link_dhcp6_enabled(Link *link) { - assert(link); - - if (!socket_ipv6_is_supported()) - return false; - - if (link->flags & IFF_LOOPBACK) - return false; - - if (!link->network) - return false; - - return link->network->dhcp & ADDRESS_FAMILY_IPV6; -} - -static bool link_dhcp4_enabled(Link *link) { - assert(link); - - if (link->flags & IFF_LOOPBACK) - return false; - - if (!link->network) - return false; - - return link->network->dhcp & ADDRESS_FAMILY_IPV4; -} - -static bool link_dhcp4_server_enabled(Link *link) { - assert(link); - - if (link->flags & IFF_LOOPBACK) - return false; - - if (!link->network) - return false; - - return link->network->dhcp_server; -} - -static bool link_ipv4ll_enabled(Link *link) { - assert(link); - - if (link->flags & IFF_LOOPBACK) - return false; - - if (!link->network) - return false; - - return link->network->link_local & ADDRESS_FAMILY_IPV4; -} - -static bool link_ipv6ll_enabled(Link *link) { - assert(link); - - if (!socket_ipv6_is_supported()) - return false; - - if (link->flags & IFF_LOOPBACK) - return false; - - if (!link->network) - return false; - - return link->network->link_local & ADDRESS_FAMILY_IPV6; -} - -static bool link_ipv6_enabled(Link *link) { - assert(link); - - if (!socket_ipv6_is_supported()) - return false; - - if (link->network->bridge) - return false; - - /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */ - return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network); -} - -static bool link_lldp_rx_enabled(Link *link) { - assert(link); - - if (link->flags & IFF_LOOPBACK) - return false; - - if (link->iftype != ARPHRD_ETHER) - return false; - - if (!link->network) - return false; - - if (link->network->bridge) - return false; - - return link->network->lldp_mode != LLDP_MODE_NO; -} - -static bool link_lldp_emit_enabled(Link *link) { - assert(link); - - if (link->flags & IFF_LOOPBACK) - return false; - - if (link->iftype != ARPHRD_ETHER) - return false; - - if (!link->network) - return false; - - return link->network->lldp_emit != LLDP_EMIT_NO; -} - -static bool link_ipv4_forward_enabled(Link *link) { - assert(link); - - if (link->flags & IFF_LOOPBACK) - return false; - - if (!link->network) - return false; - - if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID) - return false; - - return link->network->ip_forward & ADDRESS_FAMILY_IPV4; -} - -static bool link_ipv6_forward_enabled(Link *link) { - assert(link); - - if (!socket_ipv6_is_supported()) - return false; - - if (link->flags & IFF_LOOPBACK) - return false; - - if (!link->network) - return false; - - if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID) - return false; - - return link->network->ip_forward & ADDRESS_FAMILY_IPV6; -} - -static bool link_proxy_arp_enabled(Link *link) { - assert(link); - - if (link->flags & IFF_LOOPBACK) - return false; - - if (!link->network) - return false; - - if (link->network->proxy_arp < 0) - return false; - - return true; -} - -static bool link_ipv6_accept_ra_enabled(Link *link) { - assert(link); - - if (!socket_ipv6_is_supported()) - return false; - - if (link->flags & IFF_LOOPBACK) - return false; - - if (!link->network) - return false; - - /* If unset use system default (enabled if local forwarding is disabled. - * disabled if local forwarding is enabled). - * If set, ignore or enforce RA independent of local forwarding state. - */ - if (link->network->ipv6_accept_ra < 0) - /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */ - return !link_ipv6_forward_enabled(link); - else if (link->network->ipv6_accept_ra > 0) - /* accept RA even if ip_forward is enabled */ - return true; - else - /* ignore RA */ - return false; -} - -static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) { - assert(link); - - if (!socket_ipv6_is_supported()) - return _IPV6_PRIVACY_EXTENSIONS_INVALID; - - if (link->flags & IFF_LOOPBACK) - return _IPV6_PRIVACY_EXTENSIONS_INVALID; - - if (!link->network) - return _IPV6_PRIVACY_EXTENSIONS_INVALID; - - return link->network->ipv6_privacy_extensions; -} - -static int link_enable_ipv6(Link *link) { - const char *p = NULL; - bool disabled; - int r; - - if (link->flags & IFF_LOOPBACK) - return 0; - - disabled = !link_ipv6_enabled(link); - - p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6"); - - r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE); - if (r < 0) - log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m", disabled ? "disable" : "enable", link->ifname); - else - log_link_info(link, "IPv6 %sd for interface: %m", enable_disable(!disabled)); - - return 0; -} - -void link_update_operstate(Link *link) { - LinkOperationalState operstate; - assert(link); - - if (link->kernel_operstate == IF_OPER_DORMANT) - operstate = LINK_OPERSTATE_DORMANT; - else if (link_has_carrier(link)) { - Address *address; - uint8_t scope = RT_SCOPE_NOWHERE; - Iterator i; - - /* if we have carrier, check what addresses we have */ - SET_FOREACH(address, link->addresses, i) { - if (!address_is_ready(address)) - continue; - - if (address->scope < scope) - scope = address->scope; - } - - /* for operstate we also take foreign addresses into account */ - SET_FOREACH(address, link->addresses_foreign, i) { - if (!address_is_ready(address)) - continue; - - if (address->scope < scope) - scope = address->scope; - } - - if (scope < RT_SCOPE_SITE) - /* universally accessible addresses found */ - operstate = LINK_OPERSTATE_ROUTABLE; - else if (scope < RT_SCOPE_HOST) - /* only link or site local addresses found */ - operstate = LINK_OPERSTATE_DEGRADED; - else - /* no useful addresses found */ - operstate = LINK_OPERSTATE_CARRIER; - } else if (link->flags & IFF_UP) - operstate = LINK_OPERSTATE_NO_CARRIER; - else - operstate = LINK_OPERSTATE_OFF; - - if (link->operstate != operstate) { - link->operstate = operstate; - link_send_changed(link, "OperationalState", NULL); - link_dirty(link); - } -} - -#define FLAG_STRING(string, flag, old, new) \ - (((old ^ new) & flag) \ - ? ((old & flag) ? (" -" string) : (" +" string)) \ - : "") - -static int link_update_flags(Link *link, sd_netlink_message *m) { - unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags; - uint8_t operstate; - int r; - - assert(link); - - r = sd_rtnl_message_link_get_flags(m, &flags); - if (r < 0) - return log_link_warning_errno(link, r, "Could not get link flags: %m"); - - r = sd_netlink_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_link_debug(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_link_debug(link, - "Unknown link flags gained: %#.5x (ignoring)", - unknown_flags_added); - - if (unknown_flags_removed) - log_link_debug(link, - "Unknown link flags lost: %#.5x (ignoring)", - unknown_flags_removed); - } - - link->flags = flags; - link->kernel_operstate = operstate; - - link_update_operstate(link); - - return 0; -} - -static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) { - _cleanup_link_unref_ Link *link = NULL; - uint16_t type; - const char *ifname, *kind = NULL; - int r, ifindex; - unsigned short iftype; - - assert(manager); - assert(message); - assert(ret); - - /* check for link kind */ - r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); - if (r == 0) { - (void)sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind); - r = sd_netlink_message_exit_container(message); - if (r < 0) - return r; - } - - r = sd_netlink_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_link_get_type(message, &iftype); - if (r < 0) - return r; - - r = sd_netlink_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_PENDING; - link->rtnl_extended_attrs = true; - link->ifindex = ifindex; - link->iftype = iftype; - link->ifname = strdup(ifname); - if (!link->ifname) - return -ENOMEM; - - if (kind) { - link->kind = strdup(kind); - if (!link->kind) - return -ENOMEM; - } - - r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac); - if (r < 0) - log_link_debug_errno(link, r, "MAC address not found for new device, continuing without"); - - if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0) - return -ENOMEM; - - if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0) - return -ENOMEM; - - if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0) - return -ENOMEM; - - r = hashmap_ensure_allocated(&manager->links, NULL); - if (r < 0) - return r; - - r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link); - if (r < 0) - return r; - - r = link_update_flags(link, message); - if (r < 0) - return r; - - *ret = link; - link = NULL; - - return 0; -} - -static void link_free(Link *link) { - Address *address; - Iterator i; - Link *carrier; - - if (!link) - return; - - while (!set_isempty(link->addresses)) - address_free(set_first(link->addresses)); - - while (!set_isempty(link->addresses_foreign)) - address_free(set_first(link->addresses_foreign)); - - link->addresses = set_free(link->addresses); - - link->addresses_foreign = set_free(link->addresses_foreign); - - while ((address = link->pool_addresses)) { - LIST_REMOVE(addresses, link->pool_addresses, address); - address_free(address); - } - - sd_dhcp_server_unref(link->dhcp_server); - sd_dhcp_client_unref(link->dhcp_client); - sd_dhcp_lease_unref(link->dhcp_lease); - - link_lldp_emit_stop(link); - - free(link->lease_file); - - sd_lldp_unref(link->lldp); - free(link->lldp_file); - - ndisc_flush(link); - - sd_ipv4ll_unref(link->ipv4ll); - sd_dhcp6_client_unref(link->dhcp6_client); - sd_ndisc_unref(link->ndisc); - - if (link->manager) - hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)); - - free(link->ifname); - - free(link->kind); - - (void)unlink(link->state_file); - free(link->state_file); - - udev_device_unref(link->udev_device); - - HASHMAP_FOREACH (carrier, link->bound_to_links, i) - hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex)); - hashmap_free(link->bound_to_links); - - HASHMAP_FOREACH (carrier, link->bound_by_links, i) - hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex)); - hashmap_free(link->bound_by_links); - - free(link); -} - -Link *link_unref(Link *link) { - if (!link) - return NULL; - - assert(link->n_ref > 0); - - link->n_ref--; - - if (link->n_ref > 0) - return NULL; - - link_free(link); - - return NULL; -} - -Link *link_ref(Link *link) { - if (!link) - return NULL; - - assert(link->n_ref > 0); - - link->n_ref++; - - return link; -} - -int link_get(Manager *m, int ifindex, Link **ret) { - Link *link; - - assert(m); - assert(ifindex); - assert(ret); - - link = hashmap_get(m->links, INT_TO_PTR(ifindex)); - if (!link) - return -ENODEV; - - *ret = link; - - return 0; -} - -static void link_set_state(Link *link, LinkState state) { - assert(link); - - if (link->state == state) - return; - - link->state = state; - - link_send_changed(link, "AdministrativeState", NULL); -} - -static void link_enter_unmanaged(Link *link) { - assert(link); - - log_link_debug(link, "Unmanaged"); - - link_set_state(link, LINK_STATE_UNMANAGED); - - link_dirty(link); -} - -static int link_stop_clients(Link *link) { - int r = 0, k; - - assert(link); - assert(link->manager); - assert(link->manager->event); - - if (link->dhcp_client) { - k = sd_dhcp_client_stop(link->dhcp_client); - if (k < 0) - r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m"); - } - - if (link->ipv4ll) { - k = sd_ipv4ll_stop(link->ipv4ll); - if (k < 0) - r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m"); - } - - if (link->dhcp6_client) { - k = sd_dhcp6_client_stop(link->dhcp6_client); - if (k < 0) - r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m"); - } - - if (link->ndisc) { - k = sd_ndisc_stop(link->ndisc); - if (k < 0) - r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m"); - } - - link_lldp_emit_stop(link); - return r; -} - -void link_enter_failed(Link *link) { - assert(link); - - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return; - - log_link_warning(link, "Failed"); - - link_set_state(link, LINK_STATE_FAILED); - - link_stop_clients(link); - - link_dirty(link); -} - -static Address* link_find_dhcp_server_address(Link *link) { - Address *address; - - assert(link); - assert(link->network); - - /* The first statically configured address if there is any */ - LIST_FOREACH(addresses, address, link->network->static_addresses) { - - if (address->family != AF_INET) - continue; - - if (in_addr_is_null(address->family, &address->in_addr)) - continue; - - return address; - } - - /* If that didn't work, find a suitable address we got from the pool */ - LIST_FOREACH(addresses, address, link->pool_addresses) { - if (address->family != AF_INET) - continue; - - return address; - } - - return NULL; -} - -static int link_enter_configured(Link *link) { - assert(link); - assert(link->network); - assert(link->state == LINK_STATE_SETTING_ROUTES); - - log_link_info(link, "Configured"); - - link_set_state(link, LINK_STATE_CONFIGURED); - - link_dirty(link); - - return 0; -} - -void link_check_ready(Link *link) { - Address *a; - Iterator i; - - assert(link); - - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return; - - if (!link->network) - return; - - if (!link->static_configured) - return; - - if (link_ipv4ll_enabled(link)) - if (!link->ipv4ll_address || - !link->ipv4ll_route) - return; - - if (link_ipv6ll_enabled(link)) - if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0) - return; - - if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) && - !link->dhcp4_configured) || - (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) && - !link->dhcp6_configured) || - (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) && - !link->dhcp4_configured && !link->dhcp6_configured)) - return; - - if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured) - return; - - SET_FOREACH(a, link->addresses, i) - if (!address_is_ready(a)) - return; - - if (link->state != LINK_STATE_CONFIGURED) - link_enter_configured(link); - - return; -} - -static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { - _cleanup_link_unref_ Link *link = userdata; - int r; - - assert(link->link_messages > 0); - assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES, - LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED, - LINK_STATE_LINGER)); - - link->link_messages--; - - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return 1; - - r = sd_netlink_message_get_errno(m); - if (r < 0 && r != -EEXIST) - log_link_warning_errno(link, r, "Could not set route: %m"); - - if (link->link_messages == 0) { - log_link_debug(link, "Routes set"); - link->static_configured = true; - link_check_ready(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_set_state(link, LINK_STATE_SETTING_ROUTES); - - LIST_FOREACH(routes, rt, link->network->static_routes) { - r = route_configure(rt, link, route_handler); - if (r < 0) { - log_link_warning_errno(link, r, "Could not set routes: %m"); - link_enter_failed(link); - return r; - } - - link->link_messages++; - } - - if (link->link_messages == 0) { - link->static_configured = true; - link_check_ready(link); - } else - log_link_debug(link, "Setting routes"); - - return 0; -} - -int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { - _cleanup_link_unref_ Link *link = userdata; - int r; - - assert(m); - assert(link); - assert(link->ifname); - - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return 1; - - r = sd_netlink_message_get_errno(m); - if (r < 0 && r != -ESRCH) - log_link_warning_errno(link, r, "Could not drop route: %m"); - - return 1; -} - -static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { - _cleanup_link_unref_ Link *link = userdata; - int r; - - assert(rtnl); - assert(m); - assert(link); - assert(link->ifname); - assert(link->link_messages > 0); - assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES, - LINK_STATE_FAILED, LINK_STATE_LINGER)); - - link->link_messages--; - - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return 1; - - r = sd_netlink_message_get_errno(m); - if (r < 0 && r != -EEXIST) - log_link_warning_errno(link, r, "could not set address: %m"); - else if (r >= 0) - manager_rtnl_process_address(rtnl, m, link->manager); - - if (link->link_messages == 0) { - log_link_debug(link, "Addresses set"); - link_enter_set_routes(link); - } - - return 1; -} - -static int link_push_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) { - _cleanup_free_ struct in_addr *addresses = NULL; - size_t n_addresses = 0, n_allocated = 0; - char **a; - - log_debug("Copying DNS server information from %s", link->ifname); - - if (!link->network) - return 0; - - STRV_FOREACH(a, link->network->dns) { - struct in_addr ia; - - /* Only look for IPv4 addresses */ - if (inet_pton(AF_INET, *a, &ia) <= 0) - continue; - - if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1)) - return log_oom(); - - addresses[n_addresses++] = ia; - } - - if (link->network->dhcp_use_dns && - link->dhcp_lease) { - const struct in_addr *da = NULL; - int n; - - n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da); - if (n > 0) { - - if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n)) - return log_oom(); - - memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr)); - n_addresses += n; - } - } - - if (n_addresses <= 0) - return 0; - - return sd_dhcp_server_set_dns(s, addresses, n_addresses); -} - -static int link_push_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) { - _cleanup_free_ struct in_addr *addresses = NULL; - size_t n_addresses = 0, n_allocated = 0; - char **a; - - if (!link->network) - return 0; - - log_debug("Copying NTP server information from %s", link->ifname); - - STRV_FOREACH(a, link->network->ntp) { - struct in_addr ia; - - /* Only look for IPv4 addresses */ - if (inet_pton(AF_INET, *a, &ia) <= 0) - continue; - - if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1)) - return log_oom(); - - addresses[n_addresses++] = ia; - } - - if (link->network->dhcp_use_ntp && - link->dhcp_lease) { - const struct in_addr *da = NULL; - int n; - - n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da); - if (n > 0) { - - if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n)) - return log_oom(); - - memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr)); - n_addresses += n; - } - } - - if (n_addresses <= 0) - return 0; - - return sd_dhcp_server_set_ntp(s, addresses, n_addresses); -} - -static int link_set_bridge_fdb(Link *link) { - FdbEntry *fdb_entry; - int r; - - LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) { - r = fdb_entry_configure(link, fdb_entry); - if (r < 0) - return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m"); - } - - return 0; -} - -static int link_enter_set_addresses(Link *link) { - Address *ad; - int r; - - assert(link); - assert(link->network); - assert(link->state != _LINK_STATE_INVALID); - - r = link_set_bridge_fdb(link); - if (r < 0) - return r; - - link_set_state(link, LINK_STATE_SETTING_ADDRESSES); - - LIST_FOREACH(addresses, ad, link->network->static_addresses) { - r = address_configure(ad, link, address_handler, false); - if (r < 0) { - log_link_warning_errno(link, r, "Could not set addresses: %m"); - link_enter_failed(link); - return r; - } - - link->link_messages++; - } - - /* now that we can figure out a default address for the dhcp server, - start it */ - if (link_dhcp4_server_enabled(link)) { - Address *address; - Link *uplink = NULL; - bool acquired_uplink = false; - - address = link_find_dhcp_server_address(link); - if (!address) { - log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance."); - link_enter_failed(link); - return 0; - } - - /* use the server address' subnet as the pool */ - r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen, - link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size); - if (r < 0) - return r; - - /* TODO: - r = sd_dhcp_server_set_router(link->dhcp_server, - &main_address->in_addr.in); - if (r < 0) - return r; - */ - - if (link->network->dhcp_server_max_lease_time_usec > 0) { - r = sd_dhcp_server_set_max_lease_time( - link->dhcp_server, - DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC)); - if (r < 0) - return r; - } - - if (link->network->dhcp_server_default_lease_time_usec > 0) { - r = sd_dhcp_server_set_default_lease_time( - link->dhcp_server, - DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC)); - if (r < 0) - return r; - } - - if (link->network->dhcp_server_emit_dns) { - - if (link->network->n_dhcp_server_dns > 0) - r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns); - else { - uplink = manager_find_uplink(link->manager, link); - acquired_uplink = true; - - if (!uplink) { - log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink."); - r = 0; - } else - r = link_push_dns_to_dhcp_server(uplink, link->dhcp_server); - } - if (r < 0) - log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m"); - } - - - if (link->network->dhcp_server_emit_ntp) { - - if (link->network->n_dhcp_server_ntp > 0) - r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp); - else { - if (!acquired_uplink) - uplink = manager_find_uplink(link->manager, link); - - if (!uplink) { - log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink."); - r = 0; - } else - r = link_push_ntp_to_dhcp_server(uplink, link->dhcp_server); - - } - if (r < 0) - log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m"); - } - - r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router); - if (r < 0) { - log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m"); - return r; - } - - if (link->network->dhcp_server_emit_timezone) { - _cleanup_free_ char *buffer = NULL; - const char *tz = NULL; - - if (link->network->dhcp_server_timezone) - tz = link->network->dhcp_server_timezone; - else { - r = get_timezone(&buffer); - if (r < 0) - log_warning_errno(r, "Failed to determine timezone: %m"); - else - tz = buffer; - } - - if (tz) { - r = sd_dhcp_server_set_timezone(link->dhcp_server, tz); - if (r < 0) - return r; - } - } - - r = sd_dhcp_server_start(link->dhcp_server); - if (r < 0) { - log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m"); - - link_enter_failed(link); - - return 0; - } - - log_link_debug(link, "Offering DHCPv4 leases"); - } - - if (link->link_messages == 0) - link_enter_set_routes(link); - else - log_link_debug(link, "Setting addresses"); - - return 0; -} - -int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { - _cleanup_link_unref_ Link *link = userdata; - int r; - - assert(m); - assert(link); - assert(link->ifname); - - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return 1; - - r = sd_netlink_message_get_errno(m); - if (r < 0 && r != -EADDRNOTAVAIL) - log_link_warning_errno(link, r, "Could not drop address: %m"); - - return 1; -} - -static int link_set_bridge_vlan(Link *link) { - int r = 0; - - r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap); - if (r < 0) - log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m"); - - return r; -} - -static int link_set_proxy_arp(Link *link) { - const char *p = NULL; - int r; - - if (!link_proxy_arp_enabled(link)) - return 0; - - p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp"); - - r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE); - if (r < 0) - log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m"); - - return 0; -} - -static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { - _cleanup_link_unref_ Link *link = userdata; - int r; - - log_link_debug(link, "Set link"); - - r = sd_netlink_message_get_errno(m); - if (r < 0 && r != -EEXIST) { - log_link_error_errno(link, r, "Could not join netdev: %m"); - link_enter_failed(link); - return 1; - } - - return 0; -} - -static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { - _cleanup_link_unref_ Link *link = userdata; - const sd_bus_error *e; - - assert(m); - assert(link); - - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return 1; - - e = sd_bus_message_get_error(m); - if (e) - log_link_warning_errno(link, sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message); - - return 1; -} - -int link_set_hostname(Link *link, const char *hostname) { - int r; - - assert(link); - assert(link->manager); - - log_link_debug(link, "Setting transient hostname: '%s'", strna(hostname)); - - if (!link->manager->bus) { - /* TODO: replace by assert when we can rely on kdbus */ - log_link_info(link, "Not connected to system bus, ignoring transient hostname."); - return 0; - } - - r = sd_bus_call_method_async( - link->manager->bus, - NULL, - "org.freedesktop.hostname1", - "/org/freedesktop/hostname1", - "org.freedesktop.hostname1", - "SetHostname", - set_hostname_handler, - link, - "sb", - hostname, - false); - - if (r < 0) - return log_link_error_errno(link, r, "Could not set transient hostname: %m"); - - link_ref(link); - - return 0; -} - -static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { - _cleanup_link_unref_ Link *link = userdata; - const sd_bus_error *e; - - assert(m); - assert(link); - - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return 1; - - e = sd_bus_message_get_error(m); - if (e) - log_link_warning_errno(link, sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message); - - return 1; -} - -int link_set_timezone(Link *link, const char *tz) { - int r; - - assert(link); - assert(link->manager); - assert(tz); - - log_link_debug(link, "Setting system timezone: '%s'", tz); - - if (!link->manager->bus) { - log_link_info(link, "Not connected to system bus, ignoring timezone."); - return 0; - } - - r = sd_bus_call_method_async( - link->manager->bus, - NULL, - "org.freedesktop.timedate1", - "/org/freedesktop/timedate1", - "org.freedesktop.timedate1", - "SetTimezone", - set_timezone_handler, - link, - "sb", - tz, - false); - if (r < 0) - return log_link_error_errno(link, r, "Could not set timezone: %m"); - - link_ref(link); - - return 0; -} - -static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { - _cleanup_link_unref_ Link *link = userdata; - int r; - - assert(m); - assert(link); - assert(link->ifname); - - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return 1; - - r = sd_netlink_message_get_errno(m); - if (r < 0) - log_link_warning_errno(link, r, "Could not set MTU: %m"); - - return 1; -} - -int link_set_mtu(Link *link, uint32_t mtu) { - _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; - int r; - - assert(link); - assert(link->manager); - assert(link->manager->rtnl); - - log_link_debug(link, "Setting MTU: %" PRIu32, mtu); - - r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); - if (r < 0) - return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); - - r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu); - if (r < 0) - return log_link_error_errno(link, r, "Could not append MTU: %m"); - - r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL); - if (r < 0) - return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); - - link_ref(link); - - return 0; -} - -static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { - _cleanup_link_unref_ Link *link = userdata; - int r; - - assert(m); - assert(link); - assert(link->ifname); - - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return 1; - - r = sd_netlink_message_get_errno(m); - if (r < 0) - log_link_warning_errno(link, r, "Could not set link flags: %m"); - - return 1; -} - -static int link_set_flags(Link *link) { - _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; - unsigned ifi_change = 0; - unsigned ifi_flags = 0; - int r; - - assert(link); - assert(link->manager); - assert(link->manager->rtnl); - - if (link->flags & IFF_LOOPBACK) - return 0; - - if (!link->network) - return 0; - - if (link->network->arp < 0) - return 0; - - r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); - if (r < 0) - return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); - - if (link->network->arp >= 0) { - ifi_change |= IFF_NOARP; - ifi_flags |= link->network->arp ? 0 : IFF_NOARP; - } - - r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change); - if (r < 0) - return log_link_error_errno(link, r, "Could not set link flags: %m"); - - r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL); - if (r < 0) - return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); - - link_ref(link); - - return 0; -} - -static int link_set_bridge(Link *link) { - _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; - int r; - - assert(link); - assert(link->network); - - r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); - if (r < 0) - return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); - - r = sd_rtnl_message_link_set_family(req, PF_BRIDGE); - if (r < 0) - return log_link_error_errno(link, r, "Could not set message family: %m"); - - r = sd_netlink_message_open_container(req, IFLA_PROTINFO); - if (r < 0) - return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m"); - - r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, !link->network->use_bpdu); - if (r < 0) - return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m"); - - r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin); - if (r < 0) - return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m"); - - r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave); - if (r < 0) - return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m"); - - r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, !link->network->allow_port_to_be_root); - if (r < 0) - return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m"); - - r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood); - if (r < 0) - return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m"); - - if (link->network->cost != 0) { - r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost); - if (r < 0) - return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m"); - } - - r = sd_netlink_message_close_container(req); - if (r < 0) - return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m"); - - r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL); - if (r < 0) - return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); - - link_ref(link); - - return r; -} - -static int link_lldp_save(Link *link) { - _cleanup_free_ char *temp_path = NULL; - _cleanup_fclose_ FILE *f = NULL; - sd_lldp_neighbor **l = NULL; - int n = 0, r, i; - - assert(link); - assert(link->lldp_file); - - if (!link->lldp) { - (void) unlink(link->lldp_file); - return 0; - } - - r = sd_lldp_get_neighbors(link->lldp, &l); - if (r < 0) - goto finish; - if (r == 0) { - (void) unlink(link->lldp_file); - goto finish; - } - - n = r; - - r = fopen_temporary(link->lldp_file, &f, &temp_path); - if (r < 0) - goto finish; - - fchmod(fileno(f), 0644); - - for (i = 0; i < n; i++) { - const void *p; - le64_t u; - size_t sz; - - r = sd_lldp_neighbor_get_raw(l[i], &p, &sz); - if (r < 0) - goto finish; - - u = htole64(sz); - (void) fwrite(&u, 1, sizeof(u), f); - (void) fwrite(p, 1, sz, f); - } - - r = fflush_and_check(f); - if (r < 0) - goto finish; - - if (rename(temp_path, link->lldp_file) < 0) { - r = -errno; - goto finish; - } - -finish: - if (r < 0) { - (void) unlink(link->lldp_file); - if (temp_path) - (void) unlink(temp_path); - - log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file); - } - - if (l) { - for (i = 0; i < n; i++) - sd_lldp_neighbor_unref(l[i]); - free(l); - } - - return r; -} - -static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) { - Link *link = userdata; - int r; - - assert(link); - - (void) link_lldp_save(link); - - if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) { - /* If we received information about a new neighbor, restart the LLDP "fast" logic */ - - log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission."); - - r = link_lldp_emit_start(link); - if (r < 0) - log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m"); - } -} - -static int link_acquire_ipv6_conf(Link *link) { - int r; - - assert(link); - - if (link_dhcp6_enabled(link)) { - assert(link->dhcp6_client); - assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0); - - /* start DHCPv6 client in stateless mode */ - r = dhcp6_request_address(link, true); - if (r < 0 && r != -EBUSY) - return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m"); - else - log_link_debug(link, "Acquiring DHCPv6 lease"); - } - - if (link_ipv6_accept_ra_enabled(link)) { - assert(link->ndisc); - - log_link_debug(link, "Discovering IPv6 routers"); - - r = sd_ndisc_start(link->ndisc); - if (r < 0 && r != -EBUSY) - return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m"); - } - - return 0; -} - -static int link_acquire_ipv4_conf(Link *link) { - int r; - - assert(link); - assert(link->network); - assert(link->manager); - assert(link->manager->event); - - if (link_ipv4ll_enabled(link)) { - assert(link->ipv4ll); - - log_link_debug(link, "Acquiring IPv4 link-local address"); - - r = sd_ipv4ll_start(link->ipv4ll); - if (r < 0) - return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); - } - - if (link_dhcp4_enabled(link)) { - assert(link->dhcp_client); - - log_link_debug(link, "Acquiring DHCPv4 lease"); - - r = sd_dhcp_client_start(link->dhcp_client); - if (r < 0) - return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m"); - } - - return 0; -} - -static int link_acquire_conf(Link *link) { - int r; - - assert(link); - - r = link_acquire_ipv4_conf(link); - if (r < 0) - return r; - - if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) { - r = link_acquire_ipv6_conf(link); - if (r < 0) - return r; - } - - if (link_lldp_emit_enabled(link)) { - r = link_lldp_emit_start(link); - if (r < 0) - return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m"); - } - - return 0; -} - -bool link_has_carrier(Link *link) { - /* see Documentation/networking/operstates.txt in the kernel sources */ - - if (link->kernel_operstate == IF_OPER_UP) - return true; - - if (link->kernel_operstate == IF_OPER_UNKNOWN) - /* operstate may not be implemented, so fall back to flags */ - if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT)) - return true; - - return false; -} - -static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { - _cleanup_link_unref_ Link *link = userdata; - int r; - - assert(link); - - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return 1; - - r = sd_netlink_message_get_errno(m); - if (r < 0) - /* we warn but don't fail the link, as it may be - brought up later */ - log_link_warning_errno(link, r, "Could not bring up interface: %m"); - - return 1; -} - -static int link_up(Link *link) { - _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; - uint8_t ipv6ll_mode; - int r; - - assert(link); - assert(link->network); - assert(link->manager); - assert(link->manager->rtnl); - - log_link_debug(link, "Bringing link up"); - - r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); - if (r < 0) - return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); - - /* set it free if not enslaved with networkd */ - if (!link->network->bridge && !link->network->bond && !link->network->vrf) { - r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0); - if (r < 0) - return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m"); - } - - r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP); - if (r < 0) - return log_link_error_errno(link, r, "Could not set link flags: %m"); - - if (link->network->mac) { - r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac); - if (r < 0) - return log_link_error_errno(link, r, "Could not set MAC address: %m"); - } - - /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled) - for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */ - (void) link_enable_ipv6(link); - - if (link->network->mtu) { - /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes - on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */ - if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) { - - log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as " - "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m"); - - link->network->mtu = IPV6_MIN_MTU; - } - - r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu); - if (r < 0) - return log_link_error_errno(link, r, "Could not set MTU: %m"); - } - - r = sd_netlink_message_open_container(req, IFLA_AF_SPEC); - if (r < 0) - return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m"); - - if (link_ipv6_enabled(link)) { - /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */ - r = sd_netlink_message_open_container(req, AF_INET6); - if (r < 0) - return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m"); - - if (!link_ipv6ll_enabled(link)) - ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE; - else { - const char *p = NULL; - _cleanup_free_ char *stable_secret = NULL; - - p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret"); - r = read_one_line_file(p, &stable_secret); - - if (r < 0) - ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64; - else - ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; - } - r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode); - if (r < 0) - return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m"); - - if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) { - r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6); - if (r < 0) - return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m"); - } - - r = sd_netlink_message_close_container(req); - if (r < 0) - return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m"); - } - - r = sd_netlink_message_close_container(req); - if (r < 0) - return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m"); - - r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL); - if (r < 0) - return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); - - link_ref(link); - - return 0; -} - -static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { - _cleanup_link_unref_ Link *link = userdata; - int r; - - assert(link); - - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return 1; - - r = sd_netlink_message_get_errno(m); - if (r < 0) - log_link_warning_errno(link, r, "Could not bring down interface: %m"); - - return 1; -} - -static int link_down(Link *link) { - _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; - int r; - - assert(link); - assert(link->manager); - assert(link->manager->rtnl); - - log_link_debug(link, "Bringing link down"); - - r = sd_rtnl_message_new_link(link->manager->rtnl, &req, - RTM_SETLINK, link->ifindex); - if (r < 0) - return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); - - r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP); - if (r < 0) - return log_link_error_errno(link, r, "Could not set link flags: %m"); - - r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL); - if (r < 0) - return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); - - link_ref(link); - - return 0; -} - -static int link_up_can(Link *link) { - _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; - int r; - - assert(link); - - log_link_debug(link, "Bringing CAN link up"); - - r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); - if (r < 0) - return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); - - r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP); - if (r < 0) - return log_link_error_errno(link, r, "Could not set link flags: %m"); - - r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL); - if (r < 0) - return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); - - link_ref(link); - - return 0; -} - -static int link_handle_bound_to_list(Link *link) { - Link *l; - Iterator i; - int r; - bool required_up = false; - bool link_is_up = false; - - assert(link); - - if (hashmap_isempty(link->bound_to_links)) - return 0; - - if (link->flags & IFF_UP) - link_is_up = true; - - HASHMAP_FOREACH (l, link->bound_to_links, i) - if (link_has_carrier(l)) { - required_up = true; - break; - } - - if (!required_up && link_is_up) { - r = link_down(link); - if (r < 0) - return r; - } else if (required_up && !link_is_up) { - r = link_up(link); - if (r < 0) - return r; - } - - return 0; -} - -static int link_handle_bound_by_list(Link *link) { - Iterator i; - Link *l; - int r; - - assert(link); - - if (hashmap_isempty(link->bound_by_links)) - return 0; - - HASHMAP_FOREACH (l, link->bound_by_links, i) { - r = link_handle_bound_to_list(l); - if (r < 0) - return r; - } - - return 0; -} - -static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) { - int r; - - assert(link); - assert(carrier); - - if (link == carrier) - return 0; - - if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex))) - return 0; - - r = hashmap_ensure_allocated(h, NULL); - if (r < 0) - return r; - - r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier); - if (r < 0) - return r; - - return 0; -} - -static int link_new_bound_by_list(Link *link) { - Manager *m; - Link *carrier; - Iterator i; - int r; - bool list_updated = false; - - assert(link); - assert(link->manager); - - m = link->manager; - - HASHMAP_FOREACH(carrier, m->links, i) { - if (!carrier->network) - continue; - - if (strv_isempty(carrier->network->bind_carrier)) - continue; - - if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) { - r = link_put_carrier(link, carrier, &link->bound_by_links); - if (r < 0) - return r; - - list_updated = true; - } - } - - if (list_updated) - link_dirty(link); - - HASHMAP_FOREACH(carrier, link->bound_by_links, i) { - r = link_put_carrier(carrier, link, &carrier->bound_to_links); - if (r < 0) - return r; - - link_dirty(carrier); - } - - return 0; -} - -static int link_new_bound_to_list(Link *link) { - Manager *m; - Link *carrier; - Iterator i; - int r; - bool list_updated = false; - - assert(link); - assert(link->manager); - - if (!link->network) - return 0; - - if (strv_isempty(link->network->bind_carrier)) - return 0; - - m = link->manager; - - HASHMAP_FOREACH (carrier, m->links, i) { - if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) { - r = link_put_carrier(link, carrier, &link->bound_to_links); - if (r < 0) - return r; - - list_updated = true; - } - } - - if (list_updated) - link_dirty(link); - - HASHMAP_FOREACH (carrier, link->bound_to_links, i) { - r = link_put_carrier(carrier, link, &carrier->bound_by_links); - if (r < 0) - return r; - - link_dirty(carrier); - } - - return 0; -} - -static int link_new_carrier_maps(Link *link) { - int r; - - r = link_new_bound_by_list(link); - if (r < 0) - return r; - - r = link_handle_bound_by_list(link); - if (r < 0) - return r; - - r = link_new_bound_to_list(link); - if (r < 0) - return r; - - r = link_handle_bound_to_list(link); - if (r < 0) - return r; - - return 0; -} - -static void link_free_bound_to_list(Link *link) { - Link *bound_to; - Iterator i; - - HASHMAP_FOREACH (bound_to, link->bound_to_links, i) { - hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex)); - - if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex))) - link_dirty(bound_to); - } - - return; -} - -static void link_free_bound_by_list(Link *link) { - Link *bound_by; - Iterator i; - - HASHMAP_FOREACH (bound_by, link->bound_by_links, i) { - hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex)); - - if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) { - link_dirty(bound_by); - link_handle_bound_to_list(bound_by); - } - } - - return; -} - -static void link_free_carrier_maps(Link *link) { - bool list_updated = false; - - assert(link); - - if (!hashmap_isempty(link->bound_to_links)) { - link_free_bound_to_list(link); - list_updated = true; - } - - if (!hashmap_isempty(link->bound_by_links)) { - link_free_bound_by_list(link); - list_updated = true; - } - - if (list_updated) - link_dirty(link); - - return; -} - -void link_drop(Link *link) { - if (!link || link->state == LINK_STATE_LINGER) - return; - - link_set_state(link, LINK_STATE_LINGER); - - link_free_carrier_maps(link); - - log_link_debug(link, "Link removed"); - - (void)unlink(link->state_file); - link_unref(link); - - return; -} - -static int link_joined(Link *link) { - int r; - - assert(link); - assert(link->network); - - if (!hashmap_isempty(link->bound_to_links)) { - r = link_handle_bound_to_list(link); - if (r < 0) - return r; - } else if (!(link->flags & IFF_UP)) { - r = link_up(link); - if (r < 0) { - link_enter_failed(link); - return r; - } - } - - if (link->network->bridge) { - r = link_set_bridge(link); - if (r < 0) - log_link_error_errno(link, r, "Could not set bridge message: %m"); - } - - if (link->network->use_br_vlan && - (link->network->bridge || streq_ptr("bridge", link->kind))) { - r = link_set_bridge_vlan(link); - if (r < 0) - log_link_error_errno(link, r, "Could not set bridge vlan: %m"); - } - - return link_enter_set_addresses(link); -} - -static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { - _cleanup_link_unref_ Link *link = userdata; - int r; - - assert(link); - assert(link->network); - - link->enslaving--; - - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return 1; - - r = sd_netlink_message_get_errno(m); - if (r < 0 && r != -EEXIST) { - log_link_error_errno(link, r, "Could not join netdev: %m"); - link_enter_failed(link); - return 1; - } else - log_link_debug(link, "Joined netdev"); - - if (link->enslaving <= 0) - link_joined(link); - - return 1; -} - -static int link_enter_join_netdev(Link *link) { - NetDev *netdev; - Iterator i; - int r; - - assert(link); - assert(link->network); - assert(link->state == LINK_STATE_PENDING); - - link_set_state(link, LINK_STATE_ENSLAVING); - - link_dirty(link); - - if (!link->network->bridge && - !link->network->bond && - !link->network->vrf && - hashmap_isempty(link->network->stacked_netdevs)) - return link_joined(link); - - if (link->network->bond) { - log_struct(LOG_DEBUG, - LOG_LINK_INTERFACE(link), - LOG_NETDEV_INTERFACE(link->network->bond), - LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname), - NULL); - - r = netdev_join(link->network->bond, link, netdev_join_handler); - if (r < 0) { - log_struct_errno(LOG_WARNING, r, - LOG_LINK_INTERFACE(link), - LOG_NETDEV_INTERFACE(link->network->bond), - LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname), - NULL); - - link_enter_failed(link); - return r; - } - - link->enslaving++; - } - - if (link->network->bridge) { - log_struct(LOG_DEBUG, - LOG_LINK_INTERFACE(link), - LOG_NETDEV_INTERFACE(link->network->bridge), - LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname), - NULL); - - r = netdev_join(link->network->bridge, link, netdev_join_handler); - if (r < 0) { - log_struct_errno(LOG_WARNING, r, - LOG_LINK_INTERFACE(link), - LOG_NETDEV_INTERFACE(link->network->bridge), - LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname), - NULL), - link_enter_failed(link); - return r; - } - - link->enslaving++; - } - - if (link->network->vrf) { - log_struct(LOG_DEBUG, - LOG_LINK_INTERFACE(link), - LOG_NETDEV_INTERFACE(link->network->vrf), - LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname), - NULL); - r = netdev_join(link->network->vrf, link, netdev_join_handler); - if (r < 0) { - log_struct_errno(LOG_WARNING, r, - LOG_LINK_INTERFACE(link), - LOG_NETDEV_INTERFACE(link->network->vrf), - LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname), - NULL); - link_enter_failed(link); - return r; - } - - link->enslaving++; - } - - HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) { - - log_struct(LOG_DEBUG, - LOG_LINK_INTERFACE(link), - LOG_NETDEV_INTERFACE(netdev), - LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname), - NULL); - - r = netdev_join(netdev, link, netdev_join_handler); - if (r < 0) { - log_struct_errno(LOG_WARNING, r, - LOG_LINK_INTERFACE(link), - LOG_NETDEV_INTERFACE(netdev), - LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname), - NULL); - link_enter_failed(link); - return r; - } - - link->enslaving++; - } - - return 0; -} - -static int link_set_ipv4_forward(Link *link) { - int r; - - if (!link_ipv4_forward_enabled(link)) - return 0; - - /* We propagate the forwarding flag from one interface to the - * global setting one way. This means: as long as at least one - * interface was configured at any time that had IP forwarding - * enabled the setting will stay on for good. We do this - * primarily to keep IPv4 and IPv6 packet forwarding behaviour - * somewhat in sync (see below). */ - - r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE); - if (r < 0) - log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m"); - - return 0; -} - -static int link_set_ipv6_forward(Link *link) { - int r; - - if (!link_ipv6_forward_enabled(link)) - return 0; - - /* On Linux, the IPv6 stack does not know a per-interface - * packet forwarding setting: either packet forwarding is on - * for all, or off for all. We hence don't bother with a - * per-interface setting, but simply propagate the interface - * flag, if it is set, to the global flag, one-way. Note that - * while IPv4 would allow a per-interface flag, we expose the - * same behaviour there and also propagate the setting from - * one to all, to keep things simple (see above). */ - - r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE); - if (r < 0) - log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m"); - - return 0; -} - -static int link_set_ipv6_privacy_extensions(Link *link) { - char buf[DECIMAL_STR_MAX(unsigned) + 1]; - IPv6PrivacyExtensions s; - const char *p = NULL; - int r; - - s = link_ipv6_privacy_extensions(link); - if (s < 0) - return 0; - - p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr"); - xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions); - - r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE); - if (r < 0) - log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m"); - - return 0; -} - -static int link_set_ipv6_accept_ra(Link *link) { - const char *p = NULL; - int r; - - /* Make this a NOP if IPv6 is not available */ - if (!socket_ipv6_is_supported()) - return 0; - - if (link->flags & IFF_LOOPBACK) - return 0; - - if (!link->network) - return 0; - - p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra"); - - /* We handle router advertisements ourselves, tell the kernel to GTFO */ - r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE); - if (r < 0) - log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m"); - - return 0; -} - -static int link_set_ipv6_dad_transmits(Link *link) { - char buf[DECIMAL_STR_MAX(int) + 1]; - const char *p = NULL; - int r; - - /* Make this a NOP if IPv6 is not available */ - if (!socket_ipv6_is_supported()) - return 0; - - if (link->flags & IFF_LOOPBACK) - return 0; - - if (!link->network) - return 0; - - if (link->network->ipv6_dad_transmits < 0) - return 0; - - p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits"); - xsprintf(buf, "%i", link->network->ipv6_dad_transmits); - - r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE); - if (r < 0) - log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m"); - - return 0; -} - -static int link_set_ipv6_hop_limit(Link *link) { - char buf[DECIMAL_STR_MAX(int) + 1]; - const char *p = NULL; - int r; - - /* Make this a NOP if IPv6 is not available */ - if (!socket_ipv6_is_supported()) - return 0; - - if (link->flags & IFF_LOOPBACK) - return 0; - - if (!link->network) - return 0; - - if (link->network->ipv6_hop_limit < 0) - return 0; - - p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit"); - xsprintf(buf, "%i", link->network->ipv6_hop_limit); - - r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE); - if (r < 0) - log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m"); - - return 0; -} - -static int link_drop_foreign_config(Link *link) { - Address *address; - Route *route; - Iterator i; - int r; - - SET_FOREACH(address, link->addresses_foreign, i) { - /* we consider IPv6LL addresses to be managed by the kernel */ - if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1) - continue; - - r = address_remove(address, link, link_address_remove_handler); - if (r < 0) - return r; - } - - SET_FOREACH(route, link->routes_foreign, i) { - /* do not touch routes managed by the kernel */ - if (route->protocol == RTPROT_KERNEL) - continue; - - r = route_remove(route, link, link_route_remove_handler); - if (r < 0) - return r; - } - - return 0; -} - -static int link_drop_config(Link *link) { - Address *address; - Route *route; - Iterator i; - int r; - - SET_FOREACH(address, link->addresses, i) { - /* we consider IPv6LL addresses to be managed by the kernel */ - if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1) - continue; - - r = address_remove(address, link, link_address_remove_handler); - if (r < 0) - return r; - } - - SET_FOREACH(route, link->routes, i) { - /* do not touch routes managed by the kernel */ - if (route->protocol == RTPROT_KERNEL) - continue; - - r = route_remove(route, link, link_route_remove_handler); - if (r < 0) - return r; - } - - ndisc_flush(link); - - return 0; -} - -static int link_update_lldp(Link *link) { - int r; - - assert(link); - - if (!link->lldp) - return 0; - - if (link->flags & IFF_UP) { - r = sd_lldp_start(link->lldp); - if (r > 0) - log_link_debug(link, "Started LLDP."); - } else { - r = sd_lldp_stop(link->lldp); - if (r > 0) - log_link_debug(link, "Stopped LLDP."); - } - - return r; -} - -static int link_configure(Link *link) { - int r; - - assert(link); - assert(link->network); - assert(link->state == LINK_STATE_PENDING); - - if (streq_ptr(link->kind, "vcan")) { - - if (!(link->flags & IFF_UP)) { - r = link_up_can(link); - if (r < 0) { - link_enter_failed(link); - return r; - } - } - - return 0; - } - - /* Drop foreign config, but ignore loopback or critical devices. - * We do not want to remove loopback address or addresses used for root NFS. */ - if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) { - r = link_drop_foreign_config(link); - if (r < 0) - return r; - } - - r = link_set_proxy_arp(link); - if (r < 0) - return r; - - r = link_set_ipv4_forward(link); - if (r < 0) - return r; - - r = link_set_ipv6_forward(link); - if (r < 0) - return r; - - r = link_set_ipv6_privacy_extensions(link); - if (r < 0) - return r; - - r = link_set_ipv6_accept_ra(link); - if (r < 0) - return r; - - r = link_set_ipv6_dad_transmits(link); - if (r < 0) - return r; - - r = link_set_ipv6_hop_limit(link); - if (r < 0) - return r; - - r = link_set_flags(link); - if (r < 0) - return r; - - if (link_ipv4ll_enabled(link)) { - r = ipv4ll_configure(link); - if (r < 0) - return r; - } - - if (link_dhcp4_enabled(link)) { - r = dhcp4_configure(link); - if (r < 0) - return r; - } - - if (link_dhcp4_server_enabled(link)) { - r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex); - if (r < 0) - return r; - - r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0); - if (r < 0) - return r; - } - - if (link_dhcp6_enabled(link) || - link_ipv6_accept_ra_enabled(link)) { - r = dhcp6_configure(link); - if (r < 0) - return r; - } - - if (link_ipv6_accept_ra_enabled(link)) { - r = ndisc_configure(link); - if (r < 0) - return r; - } - - if (link_lldp_rx_enabled(link)) { - r = sd_lldp_new(&link->lldp); - if (r < 0) - return r; - - r = sd_lldp_set_ifindex(link->lldp, link->ifindex); - if (r < 0) - return r; - - r = sd_lldp_match_capabilities(link->lldp, - link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ? - SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS : - SD_LLDP_SYSTEM_CAPABILITIES_ALL); - if (r < 0) - return r; - - r = sd_lldp_set_filter_address(link->lldp, &link->mac); - if (r < 0) - return r; - - r = sd_lldp_attach_event(link->lldp, NULL, 0); - if (r < 0) - return r; - - r = sd_lldp_set_callback(link->lldp, lldp_handler, link); - if (r < 0) - return r; - - r = link_update_lldp(link); - if (r < 0) - return r; - } - - if (link_has_carrier(link)) { - r = link_acquire_conf(link); - if (r < 0) - return r; - } - - return link_enter_join_netdev(link); -} - -static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m, - void *userdata) { - _cleanup_link_unref_ Link *link = userdata; - Network *network; - int r; - - assert(link); - assert(link->ifname); - assert(link->manager); - - if (link->state != LINK_STATE_PENDING) - return 1; - - log_link_debug(link, "Link state is up-to-date"); - - r = link_new_bound_by_list(link); - if (r < 0) - return r; - - r = link_handle_bound_by_list(link); - if (r < 0) - return r; - - if (!link->network) { - r = network_get(link->manager, link->udev_device, link->ifname, - &link->mac, &network); - if (r == -ENOENT) { - link_enter_unmanaged(link); - return 1; - } else if (r < 0) - return r; - - if (link->flags & IFF_LOOPBACK) { - if (network->link_local != ADDRESS_FAMILY_NO) - log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link"); - - if (network->dhcp != ADDRESS_FAMILY_NO) - log_link_debug(link, "Ignoring DHCP clients for loopback link"); - - if (network->dhcp_server) - log_link_debug(link, "Ignoring DHCP server for loopback link"); - } - - r = network_apply(link->manager, network, link); - if (r < 0) - return r; - } - - r = link_new_bound_to_list(link); - if (r < 0) - return r; - - r = link_configure(link); - if (r < 0) - return r; - - return 1; -} - -int link_initialized(Link *link, struct udev_device *device) { - _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; - int r; - - assert(link); - assert(link->manager); - assert(link->manager->rtnl); - assert(device); - - if (link->state != LINK_STATE_PENDING) - return 0; - - if (link->udev_device) - return 0; - - log_link_debug(link, "udev initialized link"); - - link->udev_device = udev_device_ref(device); - - /* udev has initialized the link, but we don't know if we have yet - * processed the NEWLINK messages with the latest state. Do a GETLINK, - * when it returns we know that the pending NEWLINKs have already been - * processed and that we are up-to-date */ - - r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, - link->ifindex); - if (r < 0) - return r; - - r = sd_netlink_call_async(link->manager->rtnl, req, - link_initialized_and_synced, link, 0, NULL); - if (r < 0) - return r; - - link_ref(link); - - return 0; -} - -static int link_load(Link *link) { - _cleanup_free_ char *network_file = NULL, - *addresses = NULL, - *routes = NULL, - *dhcp4_address = NULL, - *ipv4ll_address = NULL; - union in_addr_union address; - union in_addr_union route_dst; - const char *p; - int r; - - assert(link); - - r = parse_env_file(link->state_file, NEWLINE, - "NETWORK_FILE", &network_file, - "ADDRESSES", &addresses, - "ROUTES", &routes, - "DHCP4_ADDRESS", &dhcp4_address, - "IPV4LL_ADDRESS", &ipv4ll_address, - NULL); - if (r < 0 && r != -ENOENT) - return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file); - - if (network_file) { - Network *network; - char *suffix; - - /* drop suffix */ - suffix = strrchr(network_file, '.'); - if (!suffix) { - log_link_debug(link, "Failed to get network name from %s", network_file); - goto network_file_fail; - } - *suffix = '\0'; - - r = network_get_by_name(link->manager, basename(network_file), &network); - if (r < 0) { - log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file)); - goto network_file_fail; - } - - r = network_apply(link->manager, network, link); - if (r < 0) - return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file)); - } - -network_file_fail: - - if (addresses) { - p = addresses; - - for (;;) { - _cleanup_free_ char *address_str = NULL; - char *prefixlen_str; - int family; - unsigned char prefixlen; - - r = extract_first_word(&p, &address_str, NULL, 0); - if (r < 0) { - log_link_debug_errno(link, r, "Failed to extract next address string: %m"); - continue; - } - if (r == 0) - break; - - prefixlen_str = strchr(address_str, '/'); - if (!prefixlen_str) { - log_link_debug(link, "Failed to parse address and prefix length %s", address_str); - continue; - } - - *prefixlen_str++ = '\0'; - - r = sscanf(prefixlen_str, "%hhu", &prefixlen); - if (r != 1) { - log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str); - continue; - } - - r = in_addr_from_string_auto(address_str, &family, &address); - if (r < 0) { - log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str); - continue; - } - - r = address_add(link, family, &address, prefixlen, NULL); - if (r < 0) - return log_link_error_errno(link, r, "Failed to add address: %m"); - } - } - - if (routes) { - p = routes; - - for (;;) { - Route *route; - _cleanup_free_ char *route_str = NULL; - _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL; - usec_t lifetime; - char *prefixlen_str; - int family; - unsigned char prefixlen, tos, table; - uint32_t priority; - - r = extract_first_word(&p, &route_str, NULL, 0); - if (r < 0) { - log_link_debug_errno(link, r, "Failed to extract next route string: %m"); - continue; - } - if (r == 0) - break; - - prefixlen_str = strchr(route_str, '/'); - if (!prefixlen_str) { - log_link_debug(link, "Failed to parse route %s", route_str); - continue; - } - - *prefixlen_str++ = '\0'; - - r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime); - if (r != 5) { - log_link_debug(link, - "Failed to parse destination prefix length, tos, priority, table or expiration %s", - prefixlen_str); - continue; - } - - r = in_addr_from_string_auto(route_str, &family, &route_dst); - if (r < 0) { - log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str); - continue; - } - - r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route); - if (r < 0) - return log_link_error_errno(link, r, "Failed to add route: %m"); - - if (lifetime != USEC_INFINITY) { - r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime, - 0, route_expire_handler, route); - if (r < 0) - log_link_warning_errno(link, r, "Could not arm route expiration handler: %m"); - } - - route->lifetime = lifetime; - sd_event_source_unref(route->expire); - route->expire = expire; - expire = NULL; - } - } - - if (dhcp4_address) { - r = in_addr_from_string(AF_INET, dhcp4_address, &address); - if (r < 0) { - log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address); - goto dhcp4_address_fail; - } - - r = sd_dhcp_client_new(&link->dhcp_client); - if (r < 0) - return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m"); - - r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in); - if (r < 0) - return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address); - } - -dhcp4_address_fail: - - if (ipv4ll_address) { - r = in_addr_from_string(AF_INET, ipv4ll_address, &address); - if (r < 0) { - log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address); - goto ipv4ll_address_fail; - } - - r = sd_ipv4ll_new(&link->ipv4ll); - if (r < 0) - return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m"); - - r = sd_ipv4ll_set_address(link->ipv4ll, &address.in); - if (r < 0) - return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address); - } - -ipv4ll_address_fail: - - return 0; -} - -int link_add(Manager *m, sd_netlink_message *message, Link **ret) { - Link *link; - _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_link_debug(link, "Link %d added", link->ifindex); - - r = link_load(link); - if (r < 0) - return r; - - if (detect_container() <= 0) { - /* not in a container, udev will be around */ - sprintf(ifindex_str, "n%d", link->ifindex); - device = udev_device_new_from_device_id(m->udev, ifindex_str); - if (!device) { - r = log_link_warning_errno(link, errno, "Could not find udev device: %m"); - goto failed; - } - - if (udev_device_get_is_initialized(device) <= 0) { - /* not yet ready */ - log_link_debug(link, "link pending udev initialization..."); - return 0; - } - - r = link_initialized(link, device); - if (r < 0) - goto failed; - } else { - /* we are calling a callback directly, so must take a ref */ - link_ref(link); - - r = link_initialized_and_synced(m->rtnl, NULL, link); - if (r < 0) - goto failed; - } - - return 0; -failed: - link_enter_failed(link); - return r; -} - -int link_ipv6ll_gained(Link *link, const struct in6_addr *address) { - int r; - - assert(link); - - log_link_info(link, "Gained IPv6LL"); - - link->ipv6ll_address = *address; - link_check_ready(link); - - if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) { - r = link_acquire_ipv6_conf(link); - if (r < 0) { - link_enter_failed(link); - return r; - } - } - - return 0; -} - -static int link_carrier_gained(Link *link) { - int r; - - assert(link); - - if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) { - r = link_acquire_conf(link); - if (r < 0) { - link_enter_failed(link); - return r; - } - - r = link_enter_set_addresses(link); - if (r < 0) - return r; - } - - r = link_handle_bound_by_list(link); - if (r < 0) - return r; - - return 0; -} - -static int link_carrier_lost(Link *link) { - int r; - - assert(link); - - r = link_stop_clients(link); - if (r < 0) { - link_enter_failed(link); - return r; - } - - r = link_drop_config(link); - if (r < 0) - return r; - - if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) { - log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state)); - r = link_drop_foreign_config(link); - if (r < 0) - return r; - } - - r = link_handle_bound_by_list(link); - if (r < 0) - return r; - - return 0; -} - -int link_carrier_reset(Link *link) { - int r; - - assert(link); - - if (link_has_carrier(link)) { - r = link_carrier_lost(link); - if (r < 0) - return r; - - r = link_carrier_gained(link); - if (r < 0) - return r; - - log_link_info(link, "Reset carrier"); - } - - return 0; -} - -int link_update(Link *link, sd_netlink_message *m) { - struct ether_addr mac; - const char *ifname; - uint32_t mtu; - bool had_carrier, carrier_gained, carrier_lost; - int r; - - assert(link); - assert(link->ifname); - assert(m); - - if (link->state == LINK_STATE_LINGER) { - link_ref(link); - log_link_info(link, "Link readded"); - link_set_state(link, LINK_STATE_ENSLAVING); - - r = link_new_carrier_maps(link); - if (r < 0) - return r; - } - - r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname); - if (r >= 0 && !streq(ifname, link->ifname)) { - log_link_info(link, "Renamed to %s", ifname); - - link_free_carrier_maps(link); - - r = free_and_strdup(&link->ifname, ifname); - if (r < 0) - return r; - - r = link_new_carrier_maps(link); - if (r < 0) - return r; - } - - r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu); - if (r >= 0 && mtu > 0) { - link->mtu = mtu; - if (!link->original_mtu) { - link->original_mtu = mtu; - log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu); - } - - if (link->dhcp_client) { - r = sd_dhcp_client_set_mtu(link->dhcp_client, - link->mtu); - if (r < 0) { - log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m"); - return r; - } - } - } - - /* The kernel may broadcast NEWLINK messages without the MAC address - set, simply ignore them. */ - r = sd_netlink_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_link_debug(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) - return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m"); - } - - if (link->dhcp_client) { - const DUID *duid = link_duid(link); - - r = sd_dhcp_client_set_mac(link->dhcp_client, - (const uint8_t *) &link->mac, - sizeof (link->mac), - ARPHRD_ETHER); - if (r < 0) - return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m"); - - r = sd_dhcp_client_set_iaid_duid(link->dhcp_client, - link->network->iaid, - duid->type, - duid->raw_data_len > 0 ? duid->raw_data : NULL, - duid->raw_data_len); - if (r < 0) - return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m"); - } - - if (link->dhcp6_client) { - const DUID* duid = link_duid(link); - - r = sd_dhcp6_client_set_mac(link->dhcp6_client, - (const uint8_t *) &link->mac, - sizeof (link->mac), - ARPHRD_ETHER); - if (r < 0) - return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m"); - - r = sd_dhcp6_client_set_iaid(link->dhcp6_client, - link->network->iaid); - if (r < 0) - return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m"); - - r = sd_dhcp6_client_set_duid(link->dhcp6_client, - duid->type, - duid->raw_data_len > 0 ? duid->raw_data : NULL, - duid->raw_data_len); - if (r < 0) - return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m"); - } - } - } - - had_carrier = link_has_carrier(link); - - r = link_update_flags(link, m); - if (r < 0) - return r; - - r = link_update_lldp(link); - if (r < 0) - return r; - - carrier_gained = !had_carrier && link_has_carrier(link); - carrier_lost = had_carrier && !link_has_carrier(link); - - if (carrier_gained) { - log_link_info(link, "Gained carrier"); - - r = link_carrier_gained(link); - if (r < 0) - return r; - } else if (carrier_lost) { - log_link_info(link, "Lost carrier"); - - r = link_carrier_lost(link); - if (r < 0) - return r; - } - - return 0; -} - -static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) { - bool space = false; - Iterator i; - Link *link; - - assert(f); - assert(prefix); - - if (hashmap_isempty(h)) - return; - - fputs(prefix, f); - HASHMAP_FOREACH(link, h, i) { - if (space) - fputc(' ', f); - - fprintf(f, "%i", link->ifindex); - space = true; - } - - fputc('\n', f); -} - -int link_save(Link *link) { - _cleanup_free_ char *temp_path = NULL; - _cleanup_fclose_ FILE *f = NULL; - const char *admin_state, *oper_state; - Address *a; - Route *route; - Iterator i; - int r; - - assert(link); - assert(link->state_file); - assert(link->lease_file); - assert(link->manager); - - if (link->state == LINK_STATE_LINGER) { - unlink(link->state_file); - return 0; - } - - link_lldp_save(link); - - 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 fail; - - fchmod(fileno(f), 0644); - - fprintf(f, - "# This is private data. Do not parse.\n" - "ADMIN_STATE=%s\n" - "OPER_STATE=%s\n", - admin_state, oper_state); - - if (link->network) { - bool space; - sd_dhcp6_lease *dhcp6_lease = NULL; - const char *dhcp_domainname = NULL; - char **dhcp6_domains = NULL; - - if (link->dhcp6_client) { - r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease); - if (r < 0 && r != -ENOMSG) - log_link_debug(link, "No DHCPv6 lease"); - } - - fprintf(f, "NETWORK_FILE=%s\n", link->network->filename); - - fputs("DNS=", f); - space = false; - fputstrv(f, link->network->dns, NULL, &space); - - if (link->network->dhcp_use_dns && - link->dhcp_lease) { - const struct in_addr *addresses; - - r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses); - if (r > 0) { - if (space) - fputc(' ', f); - serialize_in_addrs(f, addresses, r); - space = true; - } - } - - if (link->network->dhcp_use_dns && dhcp6_lease) { - struct in6_addr *in6_addrs; - - r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs); - if (r > 0) { - if (space) - fputc(' ', f); - serialize_in6_addrs(f, in6_addrs, r); - space = true; - } - } - - /* Make sure to flush out old entries before we use the NDISC data */ - ndisc_vacuum(link); - - if (link->network->dhcp_use_dns && link->ndisc_rdnss) { - NDiscRDNSS *dd; - - SET_FOREACH(dd, link->ndisc_rdnss, i) { - if (space) - fputc(' ', f); - - serialize_in6_addrs(f, &dd->address, 1); - space = true; - } - } - - fputc('\n', f); - - fputs("NTP=", f); - space = false; - fputstrv(f, link->network->ntp, NULL, &space); - - if (link->network->dhcp_use_ntp && - link->dhcp_lease) { - const struct in_addr *addresses; - - r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses); - if (r > 0) { - if (space) - fputc(' ', f); - serialize_in_addrs(f, addresses, r); - space = true; - } - } - - if (link->network->dhcp_use_ntp && dhcp6_lease) { - struct in6_addr *in6_addrs; - char **hosts; - - r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease, - &in6_addrs); - if (r > 0) { - if (space) - fputc(' ', f); - serialize_in6_addrs(f, in6_addrs, r); - space = true; - } - - r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts); - if (r > 0) - fputstrv(f, hosts, NULL, &space); - } - - fputc('\n', f); - - if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) { - if (link->dhcp_lease) - (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname); - if (dhcp6_lease) - (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains); - } - - fputs("DOMAINS=", f); - fputstrv(f, link->network->search_domains, NULL, &space); - - if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) { - NDiscDNSSL *dd; - - if (dhcp_domainname) - fputs_with_space(f, dhcp_domainname, NULL, &space); - if (dhcp6_domains) - fputstrv(f, dhcp6_domains, NULL, &space); - - SET_FOREACH(dd, link->ndisc_dnssl, i) - fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space); - } - - fputc('\n', f); - - fputs("ROUTE_DOMAINS=", f); - fputstrv(f, link->network->route_domains, NULL, NULL); - - if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) { - NDiscDNSSL *dd; - - if (dhcp_domainname) - fputs_with_space(f, dhcp_domainname, NULL, &space); - if (dhcp6_domains) - fputstrv(f, dhcp6_domains, NULL, &space); - - SET_FOREACH(dd, link->ndisc_dnssl, i) - fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space); - } - - fputc('\n', f); - - fprintf(f, "LLMNR=%s\n", - resolve_support_to_string(link->network->llmnr)); - fprintf(f, "MDNS=%s\n", - resolve_support_to_string(link->network->mdns)); - - if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID) - fprintf(f, "DNSSEC=%s\n", - dnssec_mode_to_string(link->network->dnssec_mode)); - - if (!set_isempty(link->network->dnssec_negative_trust_anchors)) { - const char *n; - - fputs("DNSSEC_NTA=", f); - space = false; - SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i) - fputs_with_space(f, n, NULL, &space); - fputc('\n', f); - } - - fputs("ADDRESSES=", f); - space = false; - SET_FOREACH(a, link->addresses, i) { - _cleanup_free_ char *address_str = NULL; - - r = in_addr_to_string(a->family, &a->in_addr, &address_str); - if (r < 0) - goto fail; - - fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen); - space = true; - } - fputc('\n', f); - - fputs("ROUTES=", f); - space = false; - SET_FOREACH(route, link->routes, i) { - _cleanup_free_ char *route_str = NULL; - - r = in_addr_to_string(route->family, &route->dst, &route_str); - if (r < 0) - goto fail; - - fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%hhu/"USEC_FMT, space ? " " : "", route_str, - route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime); - space = true; - } - - fputc('\n', f); - } - - print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links); - print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links); - - if (link->dhcp_lease) { - struct in_addr address; - const char *tz = NULL; - - assert(link->network); - - r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz); - if (r >= 0) - fprintf(f, "TIMEZONE=%s\n", tz); - - r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); - if (r >= 0) { - fputs("DHCP4_ADDRESS=", f); - serialize_in_addrs(f, &address, 1); - fputc('\n', f); - } - - r = dhcp_lease_save(link->dhcp_lease, link->lease_file); - if (r < 0) - goto fail; - - fprintf(f, - "DHCP_LEASE=%s\n", - link->lease_file); - } else - unlink(link->lease_file); - - if (link->ipv4ll) { - struct in_addr address; - - r = sd_ipv4ll_get_address(link->ipv4ll, &address); - if (r >= 0) { - fputs("IPV4LL_ADDRESS=", f); - serialize_in_addrs(f, &address, 1); - fputc('\n', f); - } - } - - r = fflush_and_check(f); - if (r < 0) - goto fail; - - if (rename(temp_path, link->state_file) < 0) { - r = -errno; - goto fail; - } - - return 0; - -fail: - (void) unlink(link->state_file); - if (temp_path) - (void) unlink(temp_path); - - return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file); -} - -/* The serialized state in /run is no longer up-to-date. */ -void link_dirty(Link *link) { - int r; - - assert(link); - - /* mark manager dirty as link is dirty */ - manager_dirty(link->manager); - - r = set_ensure_allocated(&link->manager->dirty_links, NULL); - if (r < 0) - /* allocation errors are ignored */ - return; - - r = set_put(link->manager->dirty_links, link); - if (r <= 0) - /* don't take another ref if the link was already dirty */ - return; - - link_ref(link); -} - -/* The serialized state in /run is up-to-date */ -void link_clean(Link *link) { - assert(link); - assert(link->manager); - - set_remove(link->manager->dirty_links, link); - link_unref(link); -} - -static const char* const link_state_table[_LINK_STATE_MAX] = { - [LINK_STATE_PENDING] = "pending", - [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_OFF] = "off", - [LINK_OPERSTATE_NO_CARRIER] = "no-carrier", - [LINK_OPERSTATE_DORMANT] = "dormant", - [LINK_OPERSTATE_CARRIER] = "carrier", - [LINK_OPERSTATE_DEGRADED] = "degraded", - [LINK_OPERSTATE_ROUTABLE] = "routable", -}; - -DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState); |