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 SD_IPV4LL_EVENT_STOP: case SD_IPV4LL_EVENT_CONFLICT: r = ipv4ll_address_lost(link); if (r < 0) { link_enter_failed(link); return; } break; case SD_IPV4LL_EVENT_BIND: r = ipv4ll_address_claimed(ll, link); if (r < 0) { link_enter_failed(link); return; } break; default: log_link_warning(link, "IPv4 link-local unknown event: %d", event); break; } }
static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) { int r; Link *link = userdata; assert(link); assert(link->network); assert(link->manager); if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) return; switch(event) { case SD_DHCP6_CLIENT_EVENT_STOP: case SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE: case SD_DHCP6_CLIENT_EVENT_RETRANS_MAX: if (sd_dhcp6_client_get_lease(client, NULL) >= 0) log_link_warning(link, "DHCPv6 lease lost"); link->dhcp6_configured = false; break; case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE: r = dhcp6_lease_address_acquired(client, link); if (r < 0) { link_enter_failed(link); return; } /* fall through */ case SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST: r = dhcp6_lease_information_acquired(client, link); if (r < 0) { link_enter_failed(link); return; } link->dhcp6_configured = true; break; default: if (event < 0) log_link_warning_errno(link, event, "DHCPv6 error: %m"); else log_link_warning(link, "DHCPv6 unknown event: %d", event); return; } link_check_ready(link); }
static int dhcp6_address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; assert(link); r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { if (link->rtnl_extended_attrs) { log_link_warning(link, "Could not set extended netlink attributes, reverting to fallback mechanism"); link->rtnl_extended_attrs = false; dhcp6_lease_address_acquired(link->dhcp6_client, link); return 1; } log_link_error_errno(link, r, "Could not set DHCPv6 address: %m"); link_enter_failed(link); } else if (r >= 0) manager_rtnl_process_address(rtnl, m, link->manager); return 1; }
static void ndisc_router_process_default(Link *link, sd_ndisc_router *rt) { _cleanup_route_free_ Route *route = NULL; struct in6_addr gateway; uint16_t lifetime; unsigned preference; usec_t time_now; int r; assert(link); assert(rt); r = sd_ndisc_router_get_lifetime(rt, &lifetime); if (r < 0) { log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m"); return; } if (lifetime == 0) /* not a default router */ return; r = sd_ndisc_router_get_address(rt, &gateway); if (r < 0) { log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m"); return; } r = sd_ndisc_router_get_preference(rt, &preference); if (r < 0) { log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m"); return; } r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); if (r < 0) { log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); return; } r = route_new(&route); if (r < 0) { log_link_error_errno(link, r, "Could not allocate route: %m"); return; } route->family = AF_INET6; route->table = RT_TABLE_MAIN; route->protocol = RTPROT_RA; route->pref = preference; route->gw.in6 = gateway; route->lifetime = time_now + lifetime * USEC_PER_SEC; r = route_configure(route, link, ndisc_netlink_handler); if (r < 0) { log_link_warning_errno(link, r, "Could not set default route: %m"); link_enter_failed(link); return; } link->ndisc_messages++; }
static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) { int r; Link *link = userdata; assert(link); assert(link->network); assert(link->manager); if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) return; switch(event) { case DHCP6_EVENT_STOP: case DHCP6_EVENT_RESEND_EXPIRE: case DHCP6_EVENT_RETRANS_MAX: log_link_debug(link, "DHCPv6 event %d", event); break; case DHCP6_EVENT_IP_ACQUIRE: r = dhcp6_lease_address_acquired(client, link); if (r < 0) { link_enter_failed(link); return; } /* fall through */ case DHCP6_EVENT_INFORMATION_REQUEST: r = dhcp6_lease_information_acquired(client, link); if (r < 0) { link_enter_failed(link); return; } break; default: if (event < 0) log_link_warning(link, "DHCPv6 error: %s", strerror(-event)); else log_link_warning(link, "DHCPv6 unknown event: %d", event); return; } }
static int dhcp_lease_renew(sd_dhcp_client *client, Link *link) { sd_dhcp_lease *lease; struct in_addr address; struct in_addr netmask; uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; int r; assert(link); assert(client); assert(link->network); r = sd_dhcp_client_get_lease(client, &lease); if (r < 0) { log_link_warning(link, "DHCP error: no lease %s", strerror(-r)); return r; } sd_dhcp_lease_unref(link->dhcp_lease); link->dhcp4_configured = false; link->dhcp_lease = sd_dhcp_lease_ref(lease); r = sd_dhcp_lease_get_address(lease, &address); if (r < 0) { log_link_warning(link, "DHCP error: no address: %s", strerror(-r)); return r; } r = sd_dhcp_lease_get_netmask(lease, &netmask); if (r < 0) { log_link_warning(link, "DHCP error: no netmask: %s", strerror(-r)); return r; } if (!link->network->dhcp_critical) { r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime); if (r < 0) { log_link_warning(link, "DHCP error: no lifetime: %s", strerror(-r)); return r; } } r = dhcp4_update_address(link, &address, &netmask, lifetime); if (r < 0) { log_link_warning(link, "could not update IP address: %s", strerror(-r)); link_enter_failed(link); return r; } return 0; }
static void ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt) { _cleanup_route_free_ Route *route = NULL; usec_t time_now; uint32_t lifetime; unsigned prefixlen; int r; assert(link); assert(rt); r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); if (r < 0) { log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); return; } r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen); if (r < 0) { log_link_error_errno(link, r, "Failed to get prefix length: %m"); return; } r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime); if (r < 0) { log_link_error_errno(link, r, "Failed to get prefix lifetime: %m"); return; } r = route_new(&route); if (r < 0) { log_link_error_errno(link, r, "Could not allocate route: %m"); return; } route->family = AF_INET6; route->table = RT_TABLE_MAIN; route->protocol = RTPROT_RA; route->flags = RTM_F_PREFIX; route->dst_prefixlen = prefixlen; route->lifetime = time_now + lifetime * USEC_PER_SEC; r = sd_ndisc_router_prefix_get_address(rt, &route->dst.in6); if (r < 0) { log_link_error_errno(link, r, "Failed to get prefix address: %m"); return; } r = route_configure(route, link, ndisc_netlink_handler); if (r < 0) { log_link_warning_errno(link, r, "Could not set prefix route: %m"); link_enter_failed(link); return; } link->ndisc_messages++; }
static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; assert(link); r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error_errno(link, r, "Could not set DHCPv4 address: %m"); link_enter_failed(link); } else if (r >= 0) manager_rtnl_process_address(rtnl, m, link->manager); link_set_dhcp_routes(link); return 1; }
static int dhcp6_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; assert(link); r = sd_rtnl_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error(link, "Could not set DHCPv6 address: %s", strerror(-r)); link_enter_failed(link); } else if (r >= 0) link_rtnl_process_address(rtnl, m, link->manager); return 1; }
static int ipv4ll_route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; assert(link); assert(!link->ipv4ll_route); r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error_errno(link, r, "could not set ipv4ll route: %m"); link_enter_failed(link); } link->ipv4ll_route = true; if (link->ipv4ll_address == true) link_check_ready(link); return 1; }
static int ipv4ll_address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { _cleanup_(link_unrefp) Link *link = userdata; int r; assert(link); assert(!link->ipv4ll_address); r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error_errno(link, r, "could not set ipv4ll address: %m"); link_enter_failed(link); } else if (r >= 0) manager_rtnl_process_address(rtnl, m, link->manager); link->ipv4ll_address = true; if (link->ipv4ll_route) link_check_ready(link); return 1; }
static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { int r; assert(link); assert(link->dhcp4_messages > 0); link->dhcp4_messages--; r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error_errno(link, r, "Could not set DHCPv4 route: %m"); link_enter_failed(link); } if (link->dhcp4_messages == 0) { link->dhcp4_configured = true; link_check_ready(link); } return 1; }
static int ipv4ll_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; assert(link); assert(!link->ipv4ll_address); r = sd_rtnl_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error(link, "could not set ipv4ll address: %s", strerror(-r)); link_enter_failed(link); } else if (r >= 0) link_rtnl_process_address(rtnl, m, link->manager); link->ipv4ll_address = true; if (link->ipv4ll_route == true) link_client_handler(link); return 1; }
static int ndisc_netlink_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; assert(link); assert(link->ndisc_messages > 0); link->ndisc_messages--; r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error_errno(link, r, "Could not set NDisc route or address: %m"); link_enter_failed(link); } if (link->ndisc_messages == 0) { link->ndisc_configured = true; link_check_ready(link); } return 1; }
static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; assert(link); assert(link->dhcp4_messages); link->dhcp4_messages --; r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error_errno(link, r, "Could not set DHCPv4 route: %m"); link_enter_failed(link); } if (!link->dhcp4_messages) { link->dhcp4_configured = true; link_check_ready(link); } return 1; }
static int dhcp4_route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; assert(link); assert(link->dhcp4_messages); link->dhcp4_messages --; r = sd_rtnl_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error(link, "could not set DHCPv4 route: %s", strerror(-r)); link_enter_failed(link); } if (!link->dhcp4_messages) { link->dhcp4_configured = true; link_client_handler(link); } return 1; }
static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { int r; assert(link); r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error_errno(link, r, "Could not set DHCPv4 address: %m"); link_enter_failed(link); } else if (r >= 0) manager_rtnl_process_address(rtnl, m, link->manager); link_set_dhcp_routes(link); /* Add back static routes since kernel removes while DHCPv4 address is removed from when lease expires */ link_request_set_routes(link); if (link->dhcp4_messages == 0) { link->dhcp4_configured = true; link_check_ready(link); } return 1; }
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; uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; int r; assert(client); assert(link); r = sd_dhcp_client_get_lease(client, &lease); if (r < 0) return log_link_error_errno(link, r, "DHCP error: No lease: %m"); r = sd_dhcp_lease_get_address(lease, &address); if (r < 0) return log_link_error_errno(link, r, "DHCP error: No address: %m"); r = sd_dhcp_lease_get_netmask(lease, &netmask); if (r < 0) return log_link_error_errno(link, r, "DHCP error: No netmask: %m"); prefixlen = in_addr_netmask_to_prefixlen(&netmask); r = sd_dhcp_lease_get_router(lease, &gateway); if (r < 0 && r != -ENODATA) return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m"); if (r >= 0) log_struct(LOG_INFO, LOG_LINK_INTERFACE(link), LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", 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(LOG_INFO, LOG_LINK_INTERFACE(link), LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u", ADDRESS_FMT_VAL(address), prefixlen), "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), "PREFIXLEN=%u", prefixlen, NULL); link->dhcp_lease = sd_dhcp_lease_ref(lease); link_dirty(link); if (link->network->dhcp_use_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_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu); } } if (link->network->dhcp_use_hostname) { const char *hostname = NULL; if (link->network->dhcp_hostname) hostname = link->network->dhcp_hostname; else (void) sd_dhcp_lease_get_hostname(lease, &hostname); if (hostname) { r = manager_set_hostname(link->manager, hostname); if (r < 0) log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname); } } if (link->network->dhcp_use_timezone) { const char *tz = NULL; (void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz); if (tz) { r = manager_set_timezone(link->manager, tz); if (r < 0) log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz); } } if (!link->network->dhcp_critical) { r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime); if (r < 0) { log_link_warning_errno(link, r, "DHCP error: no lifetime: %m"); return r; } } r = dhcp4_update_address(link, &address, &netmask, lifetime); if (r < 0) { log_link_warning_errno(link, r, "Could not update IP address: %m"); link_enter_failed(link); return r; } return 0; }
static void dhcp4_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 SD_DHCP_CLIENT_EVENT_EXPIRED: case SD_DHCP_CLIENT_EVENT_STOP: case SD_DHCP_CLIENT_EVENT_IP_CHANGE: if (link->network->dhcp_critical) { log_link_error(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 == SD_DHCP_CLIENT_EVENT_IP_CHANGE) { r = dhcp_lease_acquired(client, link); if (r < 0) { link_enter_failed(link); return; } } break; case SD_DHCP_CLIENT_EVENT_RENEW: r = dhcp_lease_renew(client, link); if (r < 0) { link_enter_failed(link); return; } break; case SD_DHCP_CLIENT_EVENT_IP_ACQUIRE: r = dhcp_lease_acquired(client, link); if (r < 0) { link_enter_failed(link); return; } break; default: if (event < 0) log_link_warning_errno(link, event, "DHCP error: Client failed: %m"); else log_link_warning(link, "DHCP unknown event: %i", event); break; } return; }
static int dhcp_lease_lost(Link *link) { _cleanup_address_free_ Address *address = NULL; struct in_addr addr; struct in_addr netmask; struct in_addr gateway; unsigned prefixlen = 0; int r; assert(link); assert(link->dhcp_lease); log_link_warning(link, "DHCP lease lost"); if (link->network->dhcp_use_routes) { _cleanup_free_ sd_dhcp_route **routes = NULL; int n, i; n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes); if (n >= 0) { for (i = 0; i < n; i++) { _cleanup_route_free_ Route *route = NULL; r = route_new(&route); if (r >= 0) { route->family = AF_INET; assert_se(sd_dhcp_route_get_gateway(routes[i], &route->gw.in) >= 0); assert_se(sd_dhcp_route_get_destination(routes[i], &route->dst.in) >= 0); assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &route->dst_prefixlen) >= 0); route_remove(route, link, link_route_remove_handler); } } } } r = address_new(&address); if (r >= 0) { r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); if (r >= 0) { _cleanup_route_free_ Route *route_gw = NULL; _cleanup_route_free_ Route *route = NULL; r = route_new(&route_gw); if (r >= 0) { route_gw->family = AF_INET; route_gw->dst.in = gateway; route_gw->dst_prefixlen = 32; route_gw->scope = RT_SCOPE_LINK; route_remove(route_gw, link, link_route_remove_handler); } r = route_new(&route); if (r >= 0) { route->family = AF_INET; route->gw.in = gateway; route_remove(route, link, link_route_remove_handler); } } r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr); if (r >= 0) { r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); if (r >= 0) prefixlen = in_addr_netmask_to_prefixlen(&netmask); address->family = AF_INET; address->in_addr.in = addr; address->prefixlen = prefixlen; address_remove(address, link, link_address_remove_handler); } } if (link->network->dhcp_use_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_link_warning(link, "DHCP error: could not reset MTU"); link_enter_failed(link); return r; } } } if (link->network->dhcp_use_hostname) { const char *hostname = NULL; if (link->network->dhcp_hostname) hostname = link->network->dhcp_hostname; else (void) sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname); if (hostname) { /* If a hostname was set due to the lease, then unset it now. */ r = manager_set_hostname(link->manager, NULL); if (r < 0) log_link_warning_errno(link, r, "Failed to reset transient hostname: %m"); } } link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); link_dirty(link); link->dhcp4_configured = false; return 0; }
static void ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *rt) { _cleanup_address_free_ Address *address = NULL; uint32_t lifetime_valid, lifetime_preferred; unsigned prefixlen; int r; assert(link); assert(rt); r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen); if (r < 0) { log_link_error_errno(link, r, "Failed to get prefix length: %m"); return; } r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_valid); if (r < 0) { log_link_error_errno(link, r, "Failed to get prefix valid lifetime: %m"); return; } r = sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime_preferred); if (r < 0) { log_link_error_errno(link, r, "Failed to get prefix preferred lifetime: %m"); return; } r = address_new(&address); if (r < 0) { log_link_error_errno(link, r, "Could not allocate address: %m"); return; } address->family = AF_INET6; r = sd_ndisc_router_prefix_get_address(rt, &address->in_addr.in6); if (r < 0) { log_link_error_errno(link, r, "Failed to get prefix address: %m"); return; } if (in_addr_is_null(AF_INET6, (const union in_addr_union *) &link->network->ipv6_token) == 0) memcpy(((char *)&address->in_addr.in6) + 8, ((char *)&link->network->ipv6_token) + 8, 8); else { /* see RFC4291 section 2.5.1 */ address->in_addr.in6.s6_addr[8] = link->mac.ether_addr_octet[0]; address->in_addr.in6.s6_addr[8] ^= 1 << 1; address->in_addr.in6.s6_addr[9] = link->mac.ether_addr_octet[1]; address->in_addr.in6.s6_addr[10] = link->mac.ether_addr_octet[2]; address->in_addr.in6.s6_addr[11] = 0xff; address->in_addr.in6.s6_addr[12] = 0xfe; address->in_addr.in6.s6_addr[13] = link->mac.ether_addr_octet[3]; address->in_addr.in6.s6_addr[14] = link->mac.ether_addr_octet[4]; address->in_addr.in6.s6_addr[15] = link->mac.ether_addr_octet[5]; } address->prefixlen = prefixlen; address->flags = IFA_F_NOPREFIXROUTE|IFA_F_MANAGETEMPADDR; address->cinfo.ifa_prefered = lifetime_preferred; address->cinfo.ifa_valid = lifetime_valid; r = address_configure(address, link, ndisc_netlink_handler, true); if (r < 0) { log_link_warning_errno(link, r, "Could not set SLAAC address: %m"); link_enter_failed(link); return; } link->ndisc_messages++; }
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; uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; int r; assert(client); assert(link); r = sd_dhcp_client_get_lease(client, &lease); if (r < 0) { log_link_warning(link, "DHCP error: no lease: %s", strerror(-r)); return r; } r = sd_dhcp_lease_get_address(lease, &address); if (r < 0) { log_link_warning(link, "DHCP error: no address: %s", strerror(-r)); return r; } r = sd_dhcp_lease_get_netmask(lease, &netmask); if (r < 0) { log_link_warning(link, "DHCP error: no netmask: %s", strerror(-r)); return r; } prefixlen = in_addr_netmask_to_prefixlen(&netmask); r = sd_dhcp_lease_get_router(lease, &gateway); if (r < 0 && r != -ENOENT) { log_link_warning(link, "DHCP error: could not get gateway: %s", strerror(-r)); return r; } if (r >= 0) log_link_struct(link, LOG_INFO, "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_link_struct(link, LOG_INFO, "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_link_error(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_link_error(link, "Failed to set transient hostname to '%s'", hostname); } } if (!link->network->dhcp_critical) { r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime); if (r < 0) { log_link_warning(link, "DHCP error: no lifetime: %s", strerror(-r)); return r; } } r = dhcp4_update_address(link, &address, &netmask, lifetime); if (r < 0) { log_link_warning(link, "could not update IP address: %s", strerror(-r)); link_enter_failed(link); return r; } return 0; }
static int link_set_dhcp_routes(Link *link) { struct in_addr gateway, address; _cleanup_free_ sd_dhcp_route **static_routes = NULL; int r, n, i; assert(link); assert(link->dhcp_lease); assert(link->network); if (!link->network->dhcp_use_routes) return 0; r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); if (r < 0) return log_link_warning_errno(link, r, "DHCP error: could not get address: %m"); r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); if (r < 0 && r != -ENODATA) return log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m"); if (r >= 0) { _cleanup_route_free_ Route *route = NULL; _cleanup_route_free_ Route *route_gw = NULL; r = route_new(&route); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); route->protocol = RTPROT_DHCP; r = route_new(&route_gw); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); /* 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.in = gateway; route_gw->dst_prefixlen = 32; route_gw->prefsrc.in = address; route_gw->scope = RT_SCOPE_LINK; route_gw->protocol = RTPROT_DHCP; route_gw->priority = link->network->dhcp_route_metric; route_gw->table = link->network->dhcp_route_table; r = route_configure(route_gw, link, dhcp4_route_handler); if (r < 0) return log_link_warning_errno(link, r, "Could not set host route: %m"); link->dhcp4_messages++; route->family = AF_INET; route->gw.in = gateway; route->prefsrc.in = address; route->priority = link->network->dhcp_route_metric; route->table = link->network->dhcp_route_table; r = route_configure(route, link, dhcp4_route_handler); if (r < 0) { log_link_warning_errno(link, r, "Could not set routes: %m"); link_enter_failed(link); return r; } link->dhcp4_messages++; } n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes); if (n == -ENODATA) return 0; if (n < 0) return log_link_warning_errno(link, n, "DHCP error: could not get routes: %m"); for (i = 0; i < n; i++) { _cleanup_route_free_ Route *route = NULL; r = route_new(&route); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); route->family = AF_INET; route->protocol = RTPROT_DHCP; assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0); assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0); assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0); route->priority = link->network->dhcp_route_metric; route->table = link->network->dhcp_route_table; route->scope = route_scope_from_address(route, &address); r = route_configure(route, link, dhcp4_route_handler); if (r < 0) return log_link_warning_errno(link, r, "Could not set host route: %m"); link->dhcp4_messages++; } return 0; }
static int link_set_dhcp_routes(Link *link) { struct in_addr gateway; struct sd_dhcp_route *static_routes; int r, n, i; assert(link); assert(link->dhcp_lease); r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); if (r < 0 && r != -ENOENT) { log_link_warning(link, "DHCP error: could not get gateway: %s", strerror(-r)); return r; } if (r >= 0) { struct in_addr address; _cleanup_route_free_ Route *route = NULL; _cleanup_route_free_ Route *route_gw = NULL; r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); if (r < 0) { log_link_warning(link, "DHCP error: could not get address: %s", strerror(-r)); return r; } r = route_new_dynamic(&route, RTPROT_DHCP); if (r < 0) { log_link_error(link, "Could not allocate route: %s", strerror(-r)); return r; } r = route_new_dynamic(&route_gw, RTPROT_DHCP); if (r < 0) { log_link_error(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->prefsrc_addr.in = address; route_gw->scope = RT_SCOPE_LINK; route_gw->metrics = link->network->dhcp_route_metric; r = route_configure(route_gw, link, &dhcp4_route_handler); if (r < 0) { log_link_warning(link, "could not set host route: %s", strerror(-r)); return r; } link->dhcp4_messages ++; route->family = AF_INET; route->in_addr.in = gateway; route->prefsrc_addr.in = address; route->metrics = link->network->dhcp_route_metric; r = route_configure(route, link, &dhcp4_route_handler); if (r < 0) { log_link_warning(link, "could not set routes: %s", strerror(-r)); link_enter_failed(link); return r; } link->dhcp4_messages ++; } n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes); if (n == -ENOENT) return 0; if (n < 0) { log_link_warning(link, "DHCP error: could not get routes: %s", strerror(-n)); return n; } for (i = 0; i < n; i++) { _cleanup_route_free_ Route *route = NULL; r = route_new_dynamic(&route, RTPROT_DHCP); if (r < 0) { log_link_error(link, "Could not allocate route: %s", strerror(-r)); return r; } route->family = AF_INET; route->in_addr.in = static_routes[i].gw_addr; route->dst_addr.in = static_routes[i].dst_addr; route->dst_prefixlen = static_routes[i].dst_prefixlen; route->metrics = link->network->dhcp_route_metric; r = route_configure(route, link, &dhcp4_route_handler); if (r < 0) { log_link_warning(link, "could not set host route: %s", strerror(-r)); return r; } link->dhcp4_messages ++; } return 0; }
static int link_set_dhcp_routes(Link *link) { _cleanup_free_ sd_dhcp_route **static_routes = NULL; bool classless_route = false, static_route = false; const struct in_addr *router; struct in_addr address; int r, n, i; uint32_t table; assert(link); if (!link->dhcp_lease) /* link went down while we configured the IP addresses? */ return 0; if (!link->network) /* link went down while we configured the IP addresses? */ return 0; if (!link->network->dhcp_use_routes) return 0; table = link_get_dhcp_route_table(link); r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); if (r < 0) return log_link_warning_errno(link, r, "DHCP error: could not get address: %m"); n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes); if (n == -ENODATA) log_link_debug_errno(link, n, "DHCP: No routes received from DHCP server: %m"); else if (n < 0) log_link_debug_errno(link, n, "DHCP error: could not get routes: %m"); for (i = 0; i < n; i++) { switch (sd_dhcp_route_get_option(static_routes[i])) { case SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE: classless_route = true; break; case SD_DHCP_OPTION_STATIC_ROUTE: static_route = true; break; } } for (i = 0; i < n; i++) { _cleanup_(route_freep) Route *route = NULL; /* if the DHCP server returns both a Classless Static Routes option and a Static Routes option, the DHCP client MUST ignore the Static Routes option. */ if (classless_route && sd_dhcp_route_get_option(static_routes[i]) != SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE) continue; r = route_new(&route); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); route->family = AF_INET; route->protocol = RTPROT_DHCP; assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0); assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0); assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0); route->priority = link->network->dhcp_route_metric; route->table = table; route->scope = route_scope_from_address(route, &address); r = route_configure(route, link, dhcp4_route_handler); if (r < 0) return log_link_warning_errno(link, r, "Could not set host route: %m"); link->dhcp4_messages++; } r = sd_dhcp_lease_get_router(link->dhcp_lease, &router); if (IN_SET(r, 0, -ENODATA)) log_link_info(link, "DHCP: No gateway received from DHCP server."); else if (r < 0) log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m"); else if (in4_addr_is_null(&router[0])) log_link_info(link, "DHCP: Received gateway is null."); /* According to RFC 3442: If the DHCP server returns both a Classless Static Routes option and a Router option, the DHCP client MUST ignore the Router option. */ if (classless_route && static_route) log_link_warning(link, "Classless static routes received from DHCP server: ignoring static-route option and router option"); if (r > 0 && !classless_route && !in4_addr_is_null(&router[0])) { _cleanup_(route_freep) Route *route = NULL, *route_gw = NULL; r = route_new(&route_gw); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); /* 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.in = router[0]; route_gw->dst_prefixlen = 32; route_gw->prefsrc.in = address; route_gw->scope = RT_SCOPE_LINK; route_gw->protocol = RTPROT_DHCP; route_gw->priority = link->network->dhcp_route_metric; route_gw->table = table; r = route_configure(route_gw, link, dhcp4_route_handler); if (r < 0) return log_link_warning_errno(link, r, "Could not set host route: %m"); link->dhcp4_messages++; r = route_new(&route); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); route->family = AF_INET; route->gw.in = router[0]; route->prefsrc.in = address; route->protocol = RTPROT_DHCP; route->priority = link->network->dhcp_route_metric; route->table = table; r = route_configure(route, link, dhcp4_route_handler); if (r < 0) { log_link_warning_errno(link, r, "Could not set routes: %m"); link_enter_failed(link); return r; } link->dhcp4_messages++; } return 0; }
static int dhcp_lease_lost(Link *link) { _cleanup_address_free_ Address *address = NULL; struct in_addr addr; struct in_addr netmask; struct in_addr gateway; unsigned prefixlen = 0; int r; assert(link); assert(link->dhcp_lease); log_link_warning(link, "DHCP lease lost"); if (link->network->dhcp_routes) { struct sd_dhcp_route *routes; int n, i; n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes); if (n >= 0) { for (i = 0; i < n; i++) { _cleanup_route_free_ Route *route = NULL; r = route_new_dynamic(&route, RTPROT_UNSPEC); if (r >= 0) { route->family = AF_INET; route->in_addr.in = routes[i].gw_addr; route->dst_addr.in = routes[i].dst_addr; route->dst_prefixlen = routes[i].dst_prefixlen; route_drop(route, link, &link_route_drop_handler); } } } } r = address_new_dynamic(&address); if (r >= 0) { r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); if (r >= 0) { _cleanup_route_free_ Route *route_gw = NULL; _cleanup_route_free_ Route *route = NULL; r = route_new_dynamic(&route_gw, RTPROT_UNSPEC); 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, &link_route_drop_handler); } r = route_new_dynamic(&route, RTPROT_UNSPEC); if (r >= 0) { route->family = AF_INET; route->in_addr.in = gateway; route_drop(route, link, &link_route_drop_handler); } } r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr); if (r >= 0) { r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); if (r >= 0) prefixlen = in_addr_netmask_to_prefixlen(&netmask); address->family = AF_INET; address->in_addr.in = addr; address->prefixlen = prefixlen; address_drop(address, link, &link_address_drop_handler); } } 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_link_warning(link, "DHCP error: could not reset MTU"); link_enter_failed(link); return r; } } } if (link->network->dhcp_hostname) { const char *hostname = NULL; if (!link->network->hostname) r = sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname); else hostname = link->network->hostname; if (r >= 0 || hostname) { r = link_set_hostname(link, hostname); if (r < 0) log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname); } } link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); link->dhcp4_configured = false; return 0; }
static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { const struct in_addr *router; sd_dhcp_lease *lease; struct in_addr address; struct in_addr netmask; unsigned prefixlen; uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; int r; assert(client); assert(link); r = sd_dhcp_client_get_lease(client, &lease); if (r < 0) return log_link_error_errno(link, r, "DHCP error: No lease: %m"); r = sd_dhcp_lease_get_address(lease, &address); if (r < 0) return log_link_error_errno(link, r, "DHCP error: No address: %m"); r = sd_dhcp_lease_get_netmask(lease, &netmask); if (r < 0) return log_link_error_errno(link, r, "DHCP error: No netmask: %m"); prefixlen = in4_addr_netmask_to_prefixlen(&netmask); r = sd_dhcp_lease_get_router(lease, &router); if (r < 0 && r != -ENODATA) return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m"); if (r > 0 && !in4_addr_is_null(&router[0])) log_struct(LOG_INFO, LOG_LINK_INTERFACE(link), LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", ADDRESS_FMT_VAL(address), prefixlen, ADDRESS_FMT_VAL(router[0])), "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), "PREFIXLEN=%u", prefixlen, "GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(router[0])); else log_struct(LOG_INFO, LOG_LINK_INTERFACE(link), LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u", ADDRESS_FMT_VAL(address), prefixlen), "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), "PREFIXLEN=%u", prefixlen); link->dhcp_lease = sd_dhcp_lease_ref(lease); link_dirty(link); if (link->network->dhcp_use_mtu) { uint16_t mtu; r = sd_dhcp_lease_get_mtu(lease, &mtu); if (r >= 0) { r = link_set_mtu(link, mtu, true); if (r < 0) log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu); } } if (link->network->dhcp_use_hostname) { const char *dhcpname = NULL; _cleanup_free_ char *hostname = NULL; if (link->network->dhcp_hostname) dhcpname = link->network->dhcp_hostname; else (void) sd_dhcp_lease_get_hostname(lease, &dhcpname); if (dhcpname) { r = shorten_overlong(dhcpname, &hostname); if (r < 0) log_link_warning_errno(link, r, "Unable to shorten overlong DHCP hostname '%s', ignoring: %m", dhcpname); if (r == 1) log_link_notice(link, "Overlong DHCP hostname received, shortened from '%s' to '%s'", dhcpname, hostname); } if (hostname) { r = manager_set_hostname(link->manager, hostname); if (r < 0) log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname); } } if (link->network->dhcp_use_timezone) { const char *tz = NULL; (void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz); if (tz) { r = manager_set_timezone(link->manager, tz); if (r < 0) log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz); } } if (!link->network->dhcp_critical) { r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime); if (r < 0) return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m"); } r = dhcp4_update_address(link, &address, &netmask, lifetime); if (r < 0) { log_link_warning_errno(link, r, "Could not update IP address: %m"); link_enter_failed(link); return r; } return 0; }
static int link_set_dhcp_routes(Link *link) { _cleanup_free_ sd_dhcp_route **static_routes = NULL; bool classless_route = false, static_route = false; struct in_addr gateway, address; int r, n, i; uint32_t table; assert(link); if (!link->dhcp_lease) /* link went down while we configured the IP addresses? */ return 0; if (!link->network) /* link went down while we configured the IP addresses? */ return 0; if (!link->network->dhcp_use_routes) return 0; /* When the interface is part of an VRF use the VRFs routing table, unless * there is a another table specified. */ table = link->network->dhcp_route_table; if (!link->network->dhcp_route_table_set && link->network->vrf != NULL) table = VRF(link->network->vrf)->table; r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); if (r < 0) return log_link_warning_errno(link, r, "DHCP error: could not get address: %m"); n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes); if (n < 0) log_link_debug_errno(link, n, "DHCP error: could not get routes: %m"); for (i = 0; i < n; i++) { if (static_routes[i]->option == SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE) classless_route = true; if (static_routes[i]->option == SD_DHCP_OPTION_STATIC_ROUTE) static_route = true; } for (i = 0; i < n; i++) { _cleanup_route_free_ Route *route = NULL; /* if the DHCP server returns both a Classless Static Routes option and a Static Routes option, the DHCP client MUST ignore the Static Routes option. */ if (classless_route && static_routes[i]->option == SD_DHCP_OPTION_STATIC_ROUTE) continue; r = route_new(&route); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); route->family = AF_INET; route->protocol = RTPROT_DHCP; assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0); assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0); assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0); route->priority = link->network->dhcp_route_metric; route->table = table; route->scope = route_scope_from_address(route, &address); r = route_configure(route, link, dhcp4_route_handler); if (r < 0) return log_link_warning_errno(link, r, "Could not set host route: %m"); link->dhcp4_messages++; } r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); if (r == -ENODATA) log_link_info_errno(link, r, "DHCP: No routes received from DHCP server: %m"); else if (r < 0) log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m"); /* According to RFC 3442: If the DHCP server returns both a Classless Static Routes option and a Router option, the DHCP client MUST ignore the Router option. */ if (classless_route && static_route) log_link_warning(link, "Classless static routes received from DHCP server: ignoring static-route option and router option"); if (r >= 0 && !classless_route) { _cleanup_route_free_ Route *route = NULL; _cleanup_route_free_ Route *route_gw = NULL; r = route_new(&route); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); route->protocol = RTPROT_DHCP; r = route_new(&route_gw); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); /* 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.in = gateway; route_gw->dst_prefixlen = 32; route_gw->prefsrc.in = address; route_gw->scope = RT_SCOPE_LINK; route_gw->protocol = RTPROT_DHCP; route_gw->priority = link->network->dhcp_route_metric; route_gw->table = table; r = route_configure(route_gw, link, dhcp4_route_handler); if (r < 0) return log_link_warning_errno(link, r, "Could not set host route: %m"); link->dhcp4_messages++; route->family = AF_INET; route->gw.in = gateway; route->prefsrc.in = address; route->priority = link->network->dhcp_route_metric; route->table = table; r = route_configure(route, link, dhcp4_route_handler); if (r < 0) { log_link_warning_errno(link, r, "Could not set routes: %m"); link_enter_failed(link); return r; } link->dhcp4_messages++; } return 0; }