X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fnetwork%2Fnetworkd-link.c;h=4b59af4ab093b5f8343e047605e0d9e5bc8fdc80;hp=7cb9ee675418101ac966b5926f0e2bba365434d9;hb=dd43110f781a9245ec00531456fee68ed763a179;hpb=d9c67ea112724e271c39553d966eae612e272e34 diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c index 7cb9ee675..4b59af4ab 100644 --- a/src/network/networkd-link.c +++ b/src/network/networkd-link.c @@ -75,12 +75,16 @@ static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) { if (!link->ifname) return -ENOMEM; - r = asprintf(&link->state_file, "/run/systemd/network/links/%"PRIu64, + r = sd_rtnl_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac); + if (r < 0) + return r; + + r = asprintf(&link->state_file, "/run/systemd/netif/links/%"PRIu64, link->ifindex); if (r < 0) return -ENOMEM; - r = asprintf(&link->lease_file, "/run/systemd/network/leases/%"PRIu64, + r = asprintf(&link->lease_file, "/run/systemd/netif/leases/%"PRIu64, link->ifindex); if (r < 0) return -ENOMEM; @@ -96,11 +100,18 @@ static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) { } static void link_free(Link *link) { + Address *address; + if (!link) return; assert(link->manager); + while ((address = link->addresses)) { + LIST_REMOVE(addresses, link->addresses, address); + address_free(address); + } + sd_dhcp_client_unref(link->dhcp_client); sd_dhcp_lease_unref(link->dhcp_lease); @@ -160,26 +171,13 @@ void link_drop(Link *link) { link->state = LINK_STATE_LINGER; - log_debug_link(link, "dropped"); + log_debug_link(link, "link removed"); link_unref(link); return; } -static int link_enter_configured(Link *link) { - assert(link); - assert(link->state == LINK_STATE_SETTING_ROUTES); - - log_info_link(link, "link configured"); - - link->state = LINK_STATE_CONFIGURED; - - link_save(link); - - return 0; -} - static void link_enter_unmanaged(Link *link) { assert(link); @@ -220,6 +218,16 @@ static int link_stop_clients(Link *link) { } } + if (link->network->dhcp_server) { + assert(link->dhcp_server); + + k = sd_dhcp_server_stop(link->dhcp_server); + if (k < 0) { + log_warning_link(link, "Could not stop DHCPv4 server: %s", strerror(-r)); + r = k; + } + } + return r; } @@ -238,6 +246,37 @@ static void link_enter_failed(Link *link) { link_save(link); } +static int link_enter_configured(Link *link) { + int r; + + assert(link); + assert(link->network); + assert(link->state == LINK_STATE_SETTING_ROUTES); + + + if (link->network->dhcp_server) { + log_debug_link(link, "offering DHCPv4 leases"); + + r = sd_dhcp_server_start(link->dhcp_server); + if (r < 0) { + log_warning_link(link, "could not start DHCPv4 server " + "instance: %s", strerror(-r)); + + link_enter_failed(link); + + return 0; + } + } + + log_info_link(link, "link configured"); + + link->state = LINK_STATE_CONFIGURED; + + link_save(link); + + return 0; +} + static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { Link *link = userdata; int r; @@ -257,7 +296,8 @@ static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { r = sd_rtnl_message_get_errno(m); if (r < 0 && r != -EEXIST) log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not set route: %s", + "MESSAGE=%*s: could not set route: %s", + IFNAMSIZ, link->ifname, strerror(-r), "ERRNO=%d", -r, NULL); @@ -290,7 +330,7 @@ static int link_enter_set_routes(Link *link) { log_debug_link(link, "setting routes"); - LIST_FOREACH(static_routes, rt, link->network->static_routes) { + LIST_FOREACH(routes, rt, link->network->static_routes) { r = route_configure(rt, link, &route_handler); if (r < 0) { log_warning_link(link, @@ -420,9 +460,10 @@ static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) } r = sd_rtnl_message_get_errno(m); - if (r < 0 && r != -ENOENT) + if (r < 0 && r != -ESRCH) log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not drop route: %s", + "MESSAGE=%*s: could not drop route: %s", + IFNAMSIZ, link->ifname, strerror(-r), "ERRNO=%d", -r, NULL); @@ -453,7 +494,8 @@ static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { r = sd_rtnl_message_get_errno(m); if (r < 0 && r != -EEXIST) log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not set address: %s", + "MESSAGE=%*s: could not set address: %s", + IFNAMSIZ, link->ifname, strerror(-r), "ERRNO=%d", -r, NULL); @@ -484,7 +526,7 @@ static int link_enter_set_addresses(Link *link) { log_debug_link(link, "setting addresses"); - LIST_FOREACH(static_addresses, ad, link->network->static_addresses) { + LIST_FOREACH(addresses, ad, link->network->static_addresses) { r = address_configure(ad, link, &address_handler); if (r < 0) { log_warning_link(link, @@ -599,7 +641,8 @@ static int address_update_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userd r = sd_rtnl_message_get_errno(m); if (r < 0 && r != -ENOENT) log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not update address: %s", + "MESSAGE=%*s: could not update address: %s", + IFNAMSIZ, link->ifname, strerror(-r), "ERRNO=%d", -r, NULL); @@ -623,9 +666,10 @@ static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdat } r = sd_rtnl_message_get_errno(m); - if (r < 0 && r != -ENOENT) + if (r < 0 && r != -EADDRNOTAVAIL) log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not drop address: %s", + "MESSAGE=%*s: could not drop address: %s", + IFNAMSIZ, link->ifname, strerror(-r), "ERRNO=%d", -r, NULL); @@ -648,7 +692,7 @@ static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, r = sd_bus_message_get_errno(m); if (r < 0) - log_warning("Could not set hostname: %s", strerror(-r)); + log_warning_link(link, "Could not set hostname: %s", strerror(-r)); link_unref(link); @@ -684,7 +728,7 @@ static int link_set_hostname(Link *link, const char *hostname) { if (r < 0) return r; - r = sd_bus_call_async(link->manager->bus, m, set_hostname_handler, link, 0, NULL); + r = sd_bus_call_async(link->manager->bus, NULL, m, set_hostname_handler, link, 0); if (r < 0) log_error_link(link, "Could not set transient hostname: %s", strerror(-r)); @@ -827,7 +871,7 @@ static int dhcp_lease_lost(Link *link) { if (r >= 0 && hostname) { r = link_set_hostname(link, ""); if (r < 0) - log_error("Failed to reset transient hostname"); + log_error_link(link, "Failed to reset transient hostname"); } } @@ -842,8 +886,6 @@ static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { struct in_addr netmask; struct in_addr gateway; unsigned prefixlen; - struct in_addr *nameservers; - size_t nameservers_size; int r; assert(client); @@ -880,7 +922,8 @@ static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { if (r >= 0) log_struct_link(LOG_INFO, link, - "MESSAGE=%s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", + "MESSAGE=%*s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", + IFNAMSIZ, link->ifname, ADDRESS_FMT_VAL(address), prefixlen, @@ -894,7 +937,8 @@ static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { NULL); else log_struct_link(LOG_INFO, link, - "MESSAGE=%s: DHCPv4 address %u.%u.%u.%u/%u", + "MESSAGE=%*s: DHCPv4 address %u.%u.%u.%u/%u", + IFNAMSIZ, link->ifname, ADDRESS_FMT_VAL(address), prefixlen, @@ -906,15 +950,6 @@ static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { link->dhcp_lease = lease; - if (link->network->dhcp_dns) { - r = sd_dhcp_lease_get_dns(lease, &nameservers, &nameservers_size); - if (r >= 0) { - r = manager_update_resolv_conf(link->manager); - if (r < 0) - log_error("Failed to update resolv.conf"); - } - } - if (link->network->dhcp_mtu) { uint16_t mtu; @@ -934,7 +969,7 @@ static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { if (r >= 0) { r = link_set_hostname(link, hostname); if (r < 0) - log_error("Failed to set transient hostname " + log_error_link(link, "Failed to set transient hostname " "to '%s'", hostname); } } @@ -1129,7 +1164,8 @@ static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) { return r; log_struct_link(LOG_INFO, link, - "MESSAGE=%s: IPv4 link-local address %u.%u.%u.%u", + "MESSAGE=%*s: IPv4 link-local address %u.%u.%u.%u", + IFNAMSIZ, link->ifname, ADDRESS_FMT_VAL(address), NULL); @@ -1226,8 +1262,13 @@ bool link_has_carrier(unsigned flags, uint8_t operstate) { return false; } +#define FLAG_STRING(string, flag, old, new) \ + (((old ^ new) & flag) \ + ? ((old & flag) ? (" -" string) : (" +" string)) \ + : "") + static int link_update_flags(Link *link, sd_rtnl_message *m) { - unsigned flags, flags_added, flags_removed, generic_flags; + unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags; uint8_t operstate; bool carrier_gained = false, carrier_lost = false; int r; @@ -1244,83 +1285,59 @@ static int link_update_flags(Link *link, sd_rtnl_message *m) { if (r < 0) /* if we got a message without operstate, take it to mean the state was unchanged */ - operstate = link->operstate; + operstate = link->kernel_operstate; - if ((link->flags == flags) && (link->operstate == operstate)) + if ((link->flags == flags) && (link->kernel_operstate == operstate)) return 0; - flags_added = (link->flags ^ flags) & flags; - flags_removed = (link->flags ^ flags) & link->flags; - generic_flags = ~(IFF_UP | IFF_LOWER_UP | IFF_DORMANT | IFF_DEBUG | - IFF_MULTICAST | IFF_BROADCAST | IFF_PROMISC | - IFF_NOARP | IFF_MASTER | IFF_SLAVE | IFF_RUNNING); - - if (flags_added & IFF_UP) - log_debug_link(link, "link is up"); - else if (flags_removed & IFF_UP) - log_debug_link(link, "link is down"); - - if (flags_added & IFF_LOWER_UP) - log_debug_link(link, "link is lower up"); - else if (flags_removed & IFF_LOWER_UP) - log_debug_link(link, "link is lower down"); - - if (flags_added & IFF_DORMANT) - log_debug_link(link, "link is dormant"); - else if (flags_removed & IFF_DORMANT) - log_debug_link(link, "link is not dormant"); - - if (flags_added & IFF_DEBUG) - log_debug_link(link, "debugging enabled in the kernel"); - else if (flags_removed & IFF_DEBUG) - log_debug_link(link, "debugging disabled in the kernel"); - - if (flags_added & IFF_MULTICAST) - log_debug_link(link, "multicast enabled"); - else if (flags_removed & IFF_MULTICAST) - log_debug_link(link, "multicast disabled"); - - if (flags_added & IFF_BROADCAST) - log_debug_link(link, "broadcast enabled"); - else if (flags_removed & IFF_BROADCAST) - log_debug_link(link, "broadcast disabled"); - - if (flags_added & IFF_PROMISC) - log_debug_link(link, "promiscuous mode enabled"); - else if (flags_removed & IFF_PROMISC) - log_debug_link(link, "promiscuous mode disabled"); - - if (flags_added & IFF_NOARP) - log_debug_link(link, "ARP protocol disabled"); - else if (flags_removed & IFF_NOARP) - log_debug_link(link, "ARP protocol enabled"); - - if (flags_added & IFF_MASTER) - log_debug_link(link, "link is master"); - else if (flags_removed & IFF_MASTER) - log_debug_link(link, "link is no longer master"); - - if (flags_added & IFF_SLAVE) - log_debug_link(link, "link is slave"); - else if (flags_removed & IFF_SLAVE) - log_debug_link(link, "link is no longer slave"); - - /* link flags are currently at most 18 bits, let's default to printing 20 */ - if (flags_added & generic_flags) - log_debug_link(link, "unknown link flags gained: %#.5x (ignoring)", - flags_added & generic_flags); - - if (flags_removed & generic_flags) - log_debug_link(link, "unknown link flags lost: %#.5x (ignoring)", - flags_removed & generic_flags); - - carrier_gained = !link_has_carrier(link->flags, link->operstate) && + if (link->flags != flags) { + log_debug_link(link, "flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", + FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), + FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), + FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), + FLAG_STRING("UP", IFF_UP, link->flags, flags), + FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), + FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), + FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), + FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), + FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), + FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), + FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), + FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), + FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), + FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), + FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), + FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), + FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), + FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), + FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); + + unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | + IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | + IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | + IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | + IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | + IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); + unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); + unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); + + /* link flags are currently at most 18 bits, let's align to printing 20 */ + if (unknown_flags_added) + log_debug_link(link, "unknown link flags gained: %#.5x (ignoring)", + unknown_flags_added); + + if (unknown_flags_removed) + log_debug_link(link, "unknown link flags lost: %#.5x (ignoring)", + unknown_flags_removed); + } + + carrier_gained = !link_has_carrier(link->flags, link->kernel_operstate) && link_has_carrier(flags, operstate); - carrier_lost = link_has_carrier(link->flags, link->operstate) && + carrier_lost = link_has_carrier(link->flags, link->kernel_operstate) && !link_has_carrier(flags, operstate); link->flags = flags; - link->operstate = operstate; + link->kernel_operstate = operstate; link_save(link); @@ -1367,7 +1384,8 @@ static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { /* we warn but don't fail the link, as it may be brought up later */ log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not bring up interface: %s", + "MESSAGE=%*s: could not bring up interface: %s", + IFNAMSIZ, link->ifname, strerror(-r), "ERRNO=%d", -r, NULL); @@ -1453,7 +1471,8 @@ static int enslave_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { r = sd_rtnl_message_get_errno(m); if (r < 0) { log_struct_link(LOG_ERR, link, - "MESSAGE=%s: could not enslave: %s", + "MESSAGE=%*s: could not enslave: %s", + IFNAMSIZ, link->ifname, strerror(-r), "ERRNO=%d", -r, NULL); @@ -1485,23 +1504,27 @@ static int link_enter_enslave(Link *link) { link_save(link); - if (!link->network->bridge && !link->network->bond && + if (!link->network->bridge && + !link->network->bond && + !link->network->tunnel && hashmap_isempty(link->network->vlans) && hashmap_isempty(link->network->macvlans)) return link_enslaved(link); if (link->network->bond) { log_struct_link(LOG_DEBUG, link, - "MESSAGE=%s: enslaving by '%s'", - link->ifname, link->network->bond->name, + "MESSAGE=%*s: enslaving by '%s'", + IFNAMSIZ, + link->ifname, link->network->bond->ifname, NETDEV(link->network->bond), NULL); r = netdev_enslave(link->network->bond, link, &enslave_handler); if (r < 0) { log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not enslave by '%s': %s", - link->ifname, link->network->bond->name, strerror(-r), + "MESSAGE=%*s: could not enslave by '%s': %s", + IFNAMSIZ, + link->ifname, link->network->bond->ifname, strerror(-r), NETDEV(link->network->bond), NULL); link_enter_failed(link); @@ -1514,16 +1537,18 @@ static int link_enter_enslave(Link *link) { if (link->network->bridge) { log_struct_link(LOG_DEBUG, link, - "MESSAGE=%s: enslaving by '%s'", - link->ifname, link->network->bridge->name, + "MESSAGE=%*s: enslaving by '%s'", + IFNAMSIZ, + link->ifname, link->network->bridge->ifname, NETDEV(link->network->bridge), NULL); r = netdev_enslave(link->network->bridge, link, &enslave_handler); if (r < 0) { log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not enslave by '%s': %s", - link->ifname, link->network->bridge->name, strerror(-r), + "MESSAGE=%*s: could not enslave by '%s': %s", + IFNAMSIZ, + link->ifname, link->network->bridge->ifname, strerror(-r), NETDEV(link->network->bridge), NULL); link_enter_failed(link); @@ -1534,16 +1559,42 @@ static int link_enter_enslave(Link *link) { link->enslaving ++; } + if (link->network->tunnel) { + log_struct_link(LOG_DEBUG, link, + "MESSAGE=%*s: enslaving by '%s'", + IFNAMSIZ, + link->ifname, link->network->tunnel->ifname, + NETDEV(link->network->tunnel), + NULL); + + r = netdev_enslave(link->network->tunnel, link, &enslave_handler); + if (r < 0) { + log_struct_link(LOG_WARNING, link, + "MESSAGE=%*s: could not enslave by '%s': %s", + IFNAMSIZ, + link->ifname, link->network->tunnel->ifname, strerror(-r), + NETDEV(link->network->tunnel), + NULL); + link_enter_failed(link); + return r; + } + + link_ref(link); + link->enslaving ++; + } + HASHMAP_FOREACH(vlan, link->network->vlans, i) { log_struct_link(LOG_DEBUG, link, - "MESSAGE=%s: enslaving by '%s'", - link->ifname, vlan->name, NETDEV(vlan), NULL); + "MESSAGE=%*s: enslaving by '%s'", + IFNAMSIZ, + link->ifname, vlan->ifname, NETDEV(vlan), NULL); r = netdev_enslave(vlan, link, &enslave_handler); if (r < 0) { log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not enslave by '%s': %s", - link->ifname, vlan->name, strerror(-r), + "MESSAGE=%*s: could not enslave by '%s': %s", + IFNAMSIZ, + link->ifname, vlan->ifname, strerror(-r), NETDEV(vlan), NULL); link_enter_failed(link); return r; @@ -1555,14 +1606,16 @@ static int link_enter_enslave(Link *link) { HASHMAP_FOREACH(macvlan, link->network->macvlans, i) { log_struct_link(LOG_DEBUG, link, - "MESSAGE=%s: enslaving by '%s'", - link->ifname, macvlan->name, NETDEV(macvlan), NULL); + "MESSAGE=%*s: enslaving by '%s'", + IFNAMSIZ, + link->ifname, macvlan->ifname, NETDEV(macvlan), NULL); r = netdev_enslave(macvlan, link, &enslave_handler); if (r < 0) { log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not enslave by '%s': %s", - link->ifname, macvlan->name, strerror(-r), + "MESSAGE=%*s: could not enslave by '%s': %s", + IFNAMSIZ, + link->ifname, macvlan->ifname, strerror(-r), NETDEV(macvlan), NULL); link_enter_failed(link); return r; @@ -1642,6 +1695,51 @@ static int link_configure(Link *link) { } } + if (link->network->dhcp_server) { + Address *address; + + 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; + + LIST_FOREACH(addresses, address, + link->network->static_addresses) { + struct in_addr pool_start; + + if (address->family != AF_INET) + continue; + + /* currently this is picked essentially at random */ + r = sd_dhcp_server_set_address(link->dhcp_server, + &address->in_addr.in); + if (r < 0) + return r; + + /* offer 32 addresses starting from the address following the server address */ + pool_start.s_addr = htobe32(be32toh(address->in_addr.in.s_addr) + 1); + r = sd_dhcp_server_set_lease_pool(link->dhcp_server, + &pool_start, 32); + + break; + } + + /* TODO: + r = sd_dhcp_server_set_router(link->dhcp_server, + &main_address->in_addr.in); + if (r < 0) + return r; + + r = sd_dhcp_server_set_prefixlen(link->dhcp_server, + main_address->prefixlen); + if (r < 0) + return r; + */ + } + if (link_has_carrier(link->flags, link->operstate)) { r = link_acquire_conf(link); if (r < 0) @@ -1665,7 +1763,7 @@ int link_initialized(Link *link, struct udev_device *device) { if (device) link->udev_device = udev_device_ref(device); - log_debug_link(link, "link initialized"); + log_debug_link(link, "udev initialized link"); r = network_get(link->manager, device, link->ifname, &link->mac, &network); if (r == -ENOENT) { @@ -1685,13 +1783,160 @@ int link_initialized(Link *link, struct udev_device *device) { return 0; } +int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) { + Manager *m = userdata; + Link *link = NULL; + uint16_t type; + _cleanup_address_free_ Address *address = NULL; + Address *ad; + char buf[INET6_ADDRSTRLEN]; + bool address_dropped = false; + int r, ifindex; + + assert(rtnl); + assert(message); + assert(m); + + r = sd_rtnl_message_get_type(message, &type); + if (r < 0) { + log_warning("rtnl: could not get message type"); + return 0; + } + + r = sd_rtnl_message_addr_get_ifindex(message, &ifindex); + if (r < 0 || ifindex <= 0) { + log_warning("rtnl: received address message without valid ifindex, ignoring"); + return 0; + } else { + r = link_get(m, ifindex, &link); + if (r < 0 || !link) { + log_warning("rtnl: received address for a nonexistent link, ignoring"); + return 0; + } + } + + r = address_new_dynamic(&address); + if (r < 0) + return 0; + + r = sd_rtnl_message_addr_get_family(message, &address->family); + if (r < 0 || !IN_SET(address->family, AF_INET, AF_INET6)) { + log_warning_link(link, "rtnl: received address with invalid family, ignoring"); + return 0; + } + + r = sd_rtnl_message_addr_get_prefixlen(message, &address->prefixlen); + if (r < 0) { + log_warning_link(link, "rtnl: received address with invalid prefixlen, ignoring"); + return 0; + } + + r = sd_rtnl_message_addr_get_scope(message, &address->scope); + if (r < 0) { + log_warning_link(link, "rtnl: received address with invalid scope, ignoring"); + return 0; + } + + switch (address->family) { + case AF_INET: + r = sd_rtnl_message_read_in_addr(message, IFA_LOCAL, &address->in_addr.in); + if (r < 0) { + log_warning_link(link, "rtnl: received address without valid address, ignoring"); + return 0; + } + + break; + + case AF_INET6: + r = sd_rtnl_message_read_in6_addr(message, IFA_ADDRESS, &address->in_addr.in6); + if (r < 0) { + log_warning_link(link, "rtnl: received address without valid address, ignoring"); + return 0; + } + + break; + + default: + assert_not_reached("invalid address family"); + } + + if (!inet_ntop(address->family, &address->in_addr, buf, INET6_ADDRSTRLEN)) { + log_warning_link(link, "could not print address"); + return 0; + } + + LIST_FOREACH(addresses, ad, link->addresses) { + if (address_equal(ad, address)) { + LIST_REMOVE(addresses, link->addresses, ad); + + address_free(ad); + + address_dropped = true; + + break; + } + } + + switch (type) { + case RTM_NEWADDR: + if (!address_dropped) + log_debug_link(link, "added address: %s/%u", buf, + address->prefixlen); + + LIST_PREPEND(addresses, link->addresses, address); + address = NULL; + + link_save(link); + + break; + case RTM_DELADDR: + if (address_dropped) { + log_debug_link(link, "removed address: %s/%u", buf, + address->prefixlen); + + link_save(link); + } + + break; + default: + assert_not_reached("Received invalid RTNL message type"); + } + + return 1; +} + +static int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { + Link *link = userdata; + int r; + + assert(rtnl); + assert(m); + assert(link); + + for (; m; m = sd_rtnl_message_next(m)) { + r = sd_rtnl_message_get_errno(m); + if (r < 0) { + log_debug_link(link, "getting address failed: %s", strerror(-r)); + continue; + } + + r = link_rtnl_process_address(rtnl, m, link->manager); + if (r < 0) + log_warning_link(link, "could not process address: %s", strerror(-r)); + } + + return 1; +} + int link_add(Manager *m, sd_rtnl_message *message, Link **ret) { Link *link; + _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; _cleanup_udev_device_unref_ struct udev_device *device = NULL; char ifindex_str[2 + DECIMAL_STR_MAX(int)]; int r; assert(m); + assert(m->rtnl); assert(message); assert(ret); @@ -1701,7 +1946,15 @@ int link_add(Manager *m, sd_rtnl_message *message, Link **ret) { link = *ret; - log_debug_link(link, "link added"); + log_debug_link(link, "link %"PRIu64" added", link->ifindex); + + r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, link->ifindex, 0); + if (r < 0) + return r; + + r = sd_rtnl_call_async(m->rtnl, req, link_get_address_handler, link, 0, NULL); + if (r < 0) + return r; if (detect_container(NULL) <= 0) { /* not in a container, udev will be around */ @@ -1712,9 +1965,11 @@ int link_add(Manager *m, sd_rtnl_message *message, Link **ret) { return -errno; } - if (udev_device_get_is_initialized(device) <= 0) + if (udev_device_get_is_initialized(device) <= 0) { /* not yet ready */ + log_debug_link(link, "udev initializing link..."); return 0; + } } r = link_initialized(link, device); @@ -1733,6 +1988,12 @@ int link_update(Link *link, sd_rtnl_message *m) { assert(link->ifname); assert(m); + if (link->state == LINK_STATE_LINGER) { + link_ref(link); + log_info_link(link, "link readded"); + link->state = LINK_STATE_ENSLAVING; + } + r = sd_rtnl_message_read_string(m, IFLA_IFNAME, &ifname); if (r >= 0 && !streq(ifname, link->ifname)) { log_info_link(link, "renamed to %s", ifname); @@ -1792,10 +2053,60 @@ int link_update(Link *link, sd_rtnl_message *m) { return link_update_flags(link, m); } +static void serialize_addresses(FILE *f, const char *key, Address *address) { + Address *ad; + + assert(f); + assert(key); + + if (!address) + return; + + fprintf(f, "%s=", key); + + LIST_FOREACH(addresses, ad, address) { + char buf[INET6_ADDRSTRLEN]; + + if (inet_ntop(ad->family, &ad->in_addr, buf, INET6_ADDRSTRLEN)) + fprintf(f, "%s%s", buf, (ad->addresses_next) ? " ": ""); + } + + fputs("\n", f); +} + +static void link_update_operstate(Link *link) { + + assert(link); + + if (link->kernel_operstate == IF_OPER_DORMANT) + link->operstate = LINK_OPERSTATE_DORMANT; + else if (link_has_carrier(link->flags, link->kernel_operstate)) { + Address *address; + uint8_t scope = RT_SCOPE_NOWHERE; + + /* if we have carrier, check what addresses we have */ + LIST_FOREACH(addresses, address, link->addresses) { + if (address->scope < scope) + scope = address->scope; + } + + if (scope < RT_SCOPE_SITE) + /* universally accessible addresses found */ + link->operstate = LINK_OPERSTATE_ROUTABLE; + else if (scope < RT_SCOPE_HOST) + /* only link or site local addresses found */ + link->operstate = LINK_OPERSTATE_DEGRADED; + else + /* no useful addresses found */ + link->operstate = LINK_OPERSTATE_CARRIER; + } else + link->operstate = LINK_OPERSTATE_UNKNOWN; +} + int link_save(Link *link) { _cleanup_free_ char *temp_path = NULL; _cleanup_fclose_ FILE *f = NULL; - const char *admin_state, *oper_state = "unknown"; + const char *admin_state, *oper_state; int r; assert(link); @@ -1803,6 +2114,8 @@ int link_save(Link *link) { assert(link->lease_file); assert(link->manager); + link_update_operstate(link); + r = manager_save(link->manager); if (r < 0) return r; @@ -1815,10 +2128,8 @@ int link_save(Link *link) { admin_state = link_state_to_string(link->state); assert(admin_state); - if (link->operstate == IF_OPER_DORMANT) - oper_state = "dormant"; - else if (link_has_carrier(link->flags, link->operstate)) - oper_state = "carrier"; + oper_state = link_operstate_to_string(link->operstate); + assert(oper_state); r = fopen_temporary(link->state_file, &f, &temp_path); if (r < 0) @@ -1833,12 +2144,23 @@ int link_save(Link *link) { "FLAGS=%u\n", admin_state, oper_state, link->flags); + if (link->network) { + serialize_addresses(f, "DNS", link->network->dns); + serialize_addresses(f, "NTP", link->network->ntp); + } + if (link->dhcp_lease) { r = dhcp_lease_save(link->dhcp_lease, link->lease_file); if (r < 0) goto finish; - fprintf(f, "DHCP_LEASE=%s\n", link->lease_file); + fprintf(f, + "DHCP_LEASE=%s\n" + "DHCP_USE_DNS=%s\n" + "DHCP_USE_NTP=%s\n", + link->lease_file, + yes_no(link->network->dhcp_dns), + yes_no(link->network->dhcp_ntp)); } else unlink(link->lease_file); @@ -1852,7 +2174,7 @@ int link_save(Link *link) { finish: if (r < 0) - log_error("Failed to save link data to %s: %s", link->state_file, strerror(-r)); + log_error_link(link, "Failed to save link data to %s: %s", link->state_file, strerror(-r)); return r; } @@ -1869,3 +2191,13 @@ static const char* const link_state_table[_LINK_STATE_MAX] = { }; DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); + +static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = { + [LINK_OPERSTATE_UNKNOWN] = "unknown", + [LINK_OPERSTATE_DORMANT] = "dormant", + [LINK_OPERSTATE_CARRIER] = "carrier", + [LINK_OPERSTATE_DEGRADED] = "degraded", + [LINK_OPERSTATE_ROUTABLE] = "routable", +}; + +DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);