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=1b7b1898c4e13bd4907ea2a5e353a3e94435a59e;hp=87bdd85644dc480ae643426a09a2f1f172bd8653;hb=51d18171529dcdad1366e422e42d538434af0ff6;hpb=af93291cc4cbd2fe2fb4af7d3c56138fb39f31dc diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c index 87bdd8564..1b7b1898c 100644 --- a/src/network/networkd-link.c +++ b/src/network/networkd-link.c @@ -23,7 +23,7 @@ #include #include -#include "networkd.h" +#include "networkd-link.h" #include "networkd-netdev.h" #include "libudev-private.h" #include "udev-util.h" @@ -33,11 +33,86 @@ #include "network-internal.h" #include "conf-parser.h" -#include "network-util.h" #include "dhcp-lease-internal.h" -static int ipv4ll_address_update(Link *link, bool deprecate); -static bool ipv4ll_is_bound(sd_ipv4ll *ll); +#define FLAG_STRING(string, flag, old, new) \ + (((old ^ new) & flag) \ + ? ((old & flag) ? (" -" string) : (" +" string)) \ + : "") + +static int link_update_flags(Link *link, sd_rtnl_message *m) { + unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags; + uint8_t operstate; + int r; + + assert(link); + + r = sd_rtnl_message_link_get_flags(m, &flags); + if (r < 0) { + log_warning_link(link, "Could not get link flags"); + return r; + } + + r = sd_rtnl_message_read_u8(m, IFLA_OPERSTATE, &operstate); + if (r < 0) + /* if we got a message without operstate, take it to mean + the state was unchanged */ + operstate = link->kernel_operstate; + + if ((link->flags == flags) && (link->kernel_operstate == operstate)) + return 0; + + if (link->flags != flags) { + log_debug_link(link, "flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", + FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), + FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), + FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), + FLAG_STRING("UP", IFF_UP, link->flags, flags), + FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), + FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), + FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), + FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), + FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), + FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), + FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), + FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), + FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), + FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), + FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), + FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), + FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), + FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), + FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); + + unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | + IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | + IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | + IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | + IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | + IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); + unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); + unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); + + /* link flags are currently at most 18 bits, let's align to + * printing 20 */ + if (unknown_flags_added) + log_debug_link(link, + "unknown link flags gained: %#.5x (ignoring)", + unknown_flags_added); + + if (unknown_flags_removed) + log_debug_link(link, + "unknown link flags lost: %#.5x (ignoring)", + unknown_flags_removed); + } + + link->flags = flags; + link->kernel_operstate = operstate; + + link_save(link); + + return 0; +} static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) { _cleanup_link_unref_ Link *link = NULL; @@ -71,7 +146,7 @@ static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) { link->n_ref = 1; link->manager = manager; - link->state = LINK_STATE_INITIALIZING; + link->state = LINK_STATE_PENDING; link->ifindex = ifindex; link->ifname = strdup(ifname); if (!link->ifname) @@ -81,11 +156,13 @@ static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) { if (r < 0) log_debug_link(link, "MAC address not found for new device, continuing without"); - r = asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex); + r = asprintf(&link->state_file, "/run/systemd/netif/links/%d", + link->ifindex); if (r < 0) return -ENOMEM; - r = asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex); + r = asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", + link->ifindex); if (r < 0) return -ENOMEM; @@ -97,6 +174,10 @@ static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) { if (r < 0) return r; + r = link_update_flags(link, message); + if (r < 0) + return r; + *ret = link; link = NULL; @@ -205,50 +286,49 @@ static int link_stop_clients(Link *link) { if (!link->network) return 0; - if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) { - assert(link->dhcp_client); - + if (link->dhcp_client) { k = sd_dhcp_client_stop(link->dhcp_client); if (k < 0) { - log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r)); + log_warning_link(link, "Could not stop DHCPv4 client: %s", + strerror(-r)); r = k; } } - if (link->network->ipv4ll) { - assert(link->ipv4ll); - + if (link->ipv4ll) { k = sd_ipv4ll_stop(link->ipv4ll); if (k < 0) { - log_warning_link(link, "Could not stop IPv4 link-local: %s", strerror(-r)); + log_warning_link(link, "Could not stop IPv4 link-local: %s", + strerror(-r)); r = k; } } - if (link->network->dhcp_server) { - assert(link->dhcp_server); - + if (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)); + log_warning_link(link, "Could not stop DHCPv4 server: %s", + strerror(-r)); r = k; } } - if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) { - assert(link->icmp6_router_discovery); + if(link->icmp6_router_discovery) { if (link->dhcp6_client) { k = sd_dhcp6_client_stop(link->dhcp6_client); if (k < 0) { - log_warning_link(link, "Could not stop DHCPv6 client: %s", strerror(-r)); + log_warning_link(link, "Could not stop DHCPv6 client: %s", + strerror(-r)); r = k; } } k = sd_icmp6_nd_stop(link->icmp6_router_discovery); if (k < 0) { - log_warning_link(link, "Could not stop ICMPv6 router discovery: %s", strerror(-r)); + log_warning_link(link, + "Could not stop ICMPv6 router discovery: %s", + strerror(-r)); r = k; } } @@ -256,7 +336,7 @@ static int link_stop_clients(Link *link) { return r; } -static void link_enter_failed(Link *link) { +void link_enter_failed(Link *link) { assert(link); if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) @@ -314,14 +394,17 @@ static int link_enter_configured(Link *link) { address = link_find_dhcp_server_address(link); if (!address) { - log_warning_link(link, "Failed to find suitable address for DHCPv4 server instance."); + log_warning_link(link, + "Failed to find suitable address for DHCPv4 server instance."); link_enter_failed(link); return 0; } log_debug_link(link, "offering DHCPv4 leases"); - r = sd_dhcp_server_set_address(link->dhcp_server, &address->in_addr.in); + r = sd_dhcp_server_set_address(link->dhcp_server, + &address->in_addr.in, + address->prefixlen); if (r < 0) return r; @@ -364,18 +447,40 @@ static int link_enter_configured(Link *link) { return 0; } +void link_client_handler(Link *link) { + assert(link); + assert(link->network); + + if (!link->static_configured) + return; + + if (link->network->ipv4ll) + if (!link->ipv4ll_address || + !link->ipv4ll_route) + return; + + if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4)) + if (!link->dhcp4_configured) + return; + + if (link->state != LINK_STATE_CONFIGURED) + link_enter_configured(link); + + return; +} + static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; - assert(link->route_messages > 0); + 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->route_messages --; + link->link_messages --; - if (IN_SET(LINK_STATE_FAILED, LINK_STATE_LINGER)) + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) return 1; r = sd_rtnl_message_get_errno(m); @@ -387,58 +492,15 @@ static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { "ERRNO=%d", -r, NULL); - /* we might have received an old reply after moving back to SETTING_ADDRESSES, - * ignore it */ - if (link->route_messages == 0 && link->state == LINK_STATE_SETTING_ROUTES) { + if (link->link_messages == 0) { log_debug_link(link, "routes set"); - link_enter_configured(link); + link->static_configured = true; + link_client_handler(link); } return 1; } -static int link_set_dhcp_routes(Link *link) { - struct sd_dhcp_route *static_routes; - int r, n, i; - - assert(link); - - n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes); - if (n < 0) { - if (n != -ENOENT) - log_warning_link(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_error_link(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 = DHCP_ROUTE_METRIC; - - r = route_configure(route, link, &route_handler); - if (r < 0) { - log_warning_link(link, - "could not set host route: %s", strerror(-r)); - return r; - } - - link->route_messages ++; - } - - return 0; -} - static int link_enter_set_routes(Link *link) { Route *rt; int r; @@ -449,123 +511,29 @@ static int link_enter_set_routes(Link *link) { link->state = LINK_STATE_SETTING_ROUTES; - if (!link->network->static_routes && !link->dhcp_lease && - (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false)) - return link_enter_configured(link); - - log_debug_link(link, "setting routes"); - LIST_FOREACH(routes, rt, link->network->static_routes) { r = route_configure(rt, link, &route_handler); if (r < 0) { log_warning_link(link, - "could not set routes: %s", strerror(-r)); - link_enter_failed(link); - return r; - } - - link->route_messages ++; - } - - if (link->ipv4ll && !link->dhcp_lease) { - _cleanup_route_free_ Route *route = NULL; - - if (r != -ENOENT) { - r = route_new_dynamic(&route, RTPROT_STATIC); - if (r < 0) { - log_error_link(link, "Could not allocate route: %s", - strerror(-r)); - return r; - } - - route->family = AF_INET; - route->scope = RT_SCOPE_LINK; - route->metrics = IPV4LL_ROUTE_METRIC; - - r = route_configure(route, link, &route_handler); - if (r < 0) { - log_warning_link(link, - "could not set routes: %s", strerror(-r)); - link_enter_failed(link); - return r; - } - - link->route_messages ++; - } - } - - if (link->dhcp_lease) { - _cleanup_route_free_ Route *route = NULL; - _cleanup_route_free_ Route *route_gw = NULL; - struct in_addr gateway; - - r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); - if (r < 0 && r != -ENOENT) { - log_warning_link(link, "DHCP error: could not get gateway: %s", + "could not set routes: %s", strerror(-r)); + link_enter_failed(link); return r; } - if (r >= 0) { - r = route_new_dynamic(&route, RTPROT_DHCP); - if (r < 0) { - log_error_link(link, "Could not allocate route: %s", - strerror(-r)); - return r; - } - - r = route_new_dynamic(&route_gw, RTPROT_DHCP); - if (r < 0) { - log_error_link(link, "Could not allocate route: %s", - strerror(-r)); - return r; - } - - /* The dhcp netmask may mask out the gateway. Add an explicit - * route for the gw host so that we can route no matter the - * netmask or existing kernel route tables. */ - route_gw->family = AF_INET; - route_gw->dst_addr.in = gateway; - route_gw->dst_prefixlen = 32; - route_gw->scope = RT_SCOPE_LINK; - route_gw->metrics = DHCP_ROUTE_METRIC; - - r = route_configure(route_gw, link, &route_handler); - if (r < 0) { - log_warning_link(link, - "could not set host route: %s", strerror(-r)); - return r; - } - - link->route_messages ++; - - route->family = AF_INET; - route->in_addr.in = gateway; - route->metrics = DHCP_ROUTE_METRIC; - - r = route_configure(route, link, &route_handler); - if (r < 0) { - log_warning_link(link, - "could not set routes: %s", strerror(-r)); - link_enter_failed(link); - return r; - } - - link->route_messages ++; - } - - if (link->network->dhcp_routes) - link_set_dhcp_routes(link); + link->link_messages ++; } - if (link->route_messages == 0) { - link_enter_configured(link); - } + if (link->link_messages == 0) { + link->static_configured = true; + link_client_handler(link); + } else + log_debug_link(link, "setting routes"); return 0; } -static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { +int link_route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; @@ -588,7 +556,7 @@ static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) return 1; } -static int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { +int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; @@ -600,13 +568,15 @@ static int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *use 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)); + 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)); + log_warning_link(link, "could not process address: %s", + strerror(-r)); } return 1; @@ -620,11 +590,11 @@ static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { assert(m); assert(link); assert(link->ifname); - assert(link->addr_messages > 0); + assert(link->link_messages > 0); assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES, LINK_STATE_FAILED, LINK_STATE_LINGER)); - link->addr_messages --; + link->link_messages --; if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) return 1; @@ -643,7 +613,7 @@ static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { link_get_address_handler(rtnl, m, link); } - if (link->addr_messages == 0) { + if (link->link_messages == 0) { log_debug_link(link, "addresses set"); link_enter_set_routes(link); } @@ -654,7 +624,6 @@ static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { static int link_enter_set_addresses(Link *link) { Address *ad; int r; - uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; assert(link); assert(link->network); @@ -662,146 +631,28 @@ static int link_enter_set_addresses(Link *link) { link->state = LINK_STATE_SETTING_ADDRESSES; - if (!link->network->static_addresses && !link->dhcp_lease && - (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false)) - return link_enter_set_routes(link); - - log_debug_link(link, "setting addresses"); - LIST_FOREACH(addresses, ad, link->network->static_addresses) { r = address_configure(ad, link, &address_handler); if (r < 0) { log_warning_link(link, - "could not set addresses: %s", strerror(-r)); - link_enter_failed(link); - return r; - } - - link->addr_messages ++; - } - - if (link->ipv4ll && !link->dhcp_lease) { - _cleanup_address_free_ Address *ll_addr = NULL; - struct in_addr addr; - - r = sd_ipv4ll_get_address(link->ipv4ll, &addr); - if (r < 0 && r != -ENOENT) { - log_warning_link(link, "IPV4LL error: no address: %s", - strerror(-r)); - return r; - } - - if (r != -ENOENT) { - r = address_new_dynamic(&ll_addr); - if (r < 0) { - log_error_link(link, "Could not allocate address: %s", strerror(-r)); - return r; - } - - ll_addr->family = AF_INET; - ll_addr->in_addr.in = addr; - ll_addr->prefixlen = 16; - ll_addr->broadcast.s_addr = ll_addr->in_addr.in.s_addr | htonl(0xfffffffflu >> ll_addr->prefixlen); - ll_addr->scope = RT_SCOPE_LINK; - - r = address_configure(ll_addr, link, &address_handler); - if (r < 0) { - log_warning_link(link, - "could not set addresses: %s", strerror(-r)); - link_enter_failed(link); - return r; - } - - link->addr_messages ++; - } - } - - if (link->dhcp_lease) { - _cleanup_address_free_ Address *address = NULL; - struct in_addr addr; - struct in_addr netmask; - unsigned prefixlen; - - r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr); - if (r < 0) { - log_warning_link(link, "DHCP error: no address: %s", - strerror(-r)); - return r; - } - - if (!link->network->dhcp_critical) { - r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, - &lifetime); - if (r < 0) { - log_warning_link(link, "DHCP error: no lifetime: %s", - strerror(-r)); - return r; - } - } - - r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); - if (r < 0) { - log_warning_link(link, "DHCP error: no netmask: %s", + "could not set addresses: %s", strerror(-r)); - return r; - } - - prefixlen = net_netmask_to_prefixlen(&netmask); - - r = address_new_dynamic(&address); - if (r < 0) { - log_error_link(link, "Could not allocate address: %s", - strerror(-r)); - return r; - } - - address->family = AF_INET; - address->in_addr.in = addr; - address->cinfo.ifa_prefered = lifetime; - address->cinfo.ifa_valid = lifetime; - address->prefixlen = prefixlen; - address->broadcast.s_addr = addr.s_addr | ~netmask.s_addr; - - /* use update rather than configure so that we will update the lifetime - of an existing address if it has already been configured */ - r = address_update(address, link, &address_handler); - if (r < 0) { - log_warning_link(link, - "could not set addresses: %s", strerror(-r)); link_enter_failed(link); return r; } - link->addr_messages ++; + link->link_messages ++; } - return 0; -} - -static int address_update_handler(sd_rtnl *rtnl, sd_rtnl_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_rtnl_message_get_errno(m); - if (r < 0 && r != -ENOENT) - log_struct_link(LOG_WARNING, link, - "MESSAGE=%-*s: could not update address: %s", - IFNAMSIZ, - link->ifname, strerror(-r), - "ERRNO=%d", -r, - NULL); + if (link->link_messages == 0) { + link_enter_set_routes(link); + } else + log_debug_link(link, "setting addresses"); - return 1; + return 0; } -static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { +int link_address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; @@ -824,7 +675,8 @@ static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdat return 1; } -static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { +static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, + sd_bus_error *ret_error) { _cleanup_link_unref_ Link *link = userdata; int r; @@ -837,12 +689,13 @@ static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, if (r < 0) r = -r; if (r > 0) - log_warning_link(link, "Could not set hostname: %s", strerror(r)); + log_warning_link(link, "Could not set hostname: %s", + strerror(r)); return 1; } -static int link_set_hostname(Link *link, const char *hostname) { +int link_set_hostname(Link *link, const char *hostname) { _cleanup_bus_message_unref_ sd_bus_message *m = NULL; int r = 0; @@ -852,8 +705,10 @@ static int link_set_hostname(Link *link, const char *hostname) { log_debug_link(link, "Setting transient hostname: '%s'", hostname); - if (!link->manager->bus) { /* TODO: replace by assert when we can rely on kdbus */ - log_info_link(link, "Not connected to system bus, ignoring transient hostname."); + if (!link->manager->bus) { + /* TODO: replace by assert when we can rely on kdbus */ + log_info_link(link, + "Not connected to system bus, ignoring transient hostname."); return 0; } @@ -871,9 +726,11 @@ static int link_set_hostname(Link *link, const char *hostname) { if (r < 0) return r; - r = sd_bus_call_async(link->manager->bus, NULL, m, set_hostname_handler, link, 0); + 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)); + log_error_link(link, "Could not set transient hostname: %s", + strerror(-r)); return r; } @@ -904,7 +761,7 @@ static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { return 1; } -static int link_set_mtu(Link *link, uint32_t mtu) { +int link_set_mtu(Link *link, uint32_t mtu) { _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; int r; @@ -919,478 +776,26 @@ static int link_set_mtu(Link *link, uint32_t mtu) { if (r < 0) { log_error_link(link, "Could not allocate RTM_SETLINK message"); return r; - } - - r = sd_rtnl_message_append_u32(req, IFLA_MTU, mtu); - if (r < 0) { - log_error_link(link, "Could not append MTU: %s", strerror(-r)); - return r; - } - - r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL); - if (r < 0) { - log_error_link(link, - "Could not send rtnetlink message: %s", strerror(-r)); - return r; - } - - link_ref(link); - - 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; - int r; - - assert(link); - assert(link->dhcp_lease); - - log_warning_link(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, &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, &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, &route_drop_handler); - } - } - - sd_dhcp_lease_get_address(link->dhcp_lease, &addr); - sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); - prefixlen = net_netmask_to_prefixlen(&netmask); - - address->family = AF_INET; - address->in_addr.in = addr; - address->prefixlen = prefixlen; - - address_drop(address, link, &address_drop_handler); - } - - if (link->network->dhcp_mtu) { - uint16_t mtu; - - r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu); - if (r >= 0 && link->original_mtu != mtu) { - r = link_set_mtu(link, link->original_mtu); - if (r < 0) { - log_warning_link(link, "DHCP error: could not reset MTU"); - link_enter_failed(link); - return r; - } - } - } - - if (link->network->dhcp_hostname) { - const char *hostname = NULL; - - r = sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname); - if (r >= 0 && hostname) { - r = link_set_hostname(link, ""); - if (r < 0) - log_error_link(link, "Failed to reset transient hostname"); - } - } - - link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); - - return 0; -} - -static int dhcp_lease_renew(sd_dhcp_client *client, Link *link) { - sd_dhcp_lease *lease; - int r; - - r = sd_dhcp_client_get_lease(client, &lease); - if (r < 0) { - log_warning_link(link, "DHCP error: no lease %s", - strerror(-r)); - return r; - } - - sd_dhcp_lease_unref(link->dhcp_lease); - link->dhcp_lease = lease; - - link_enter_set_addresses(link); - - return 0; -} - -static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { - sd_dhcp_lease *lease; - struct in_addr address; - struct in_addr netmask; - struct in_addr gateway; - unsigned prefixlen; - int r; - - assert(client); - assert(link); - - r = sd_dhcp_client_get_lease(client, &lease); - if (r < 0) { - log_warning_link(link, "DHCP error: no lease: %s", - strerror(-r)); - return r; - } - - r = sd_dhcp_lease_get_address(lease, &address); - if (r < 0) { - log_warning_link(link, "DHCP error: no address: %s", - strerror(-r)); - return r; - } - - r = sd_dhcp_lease_get_netmask(lease, &netmask); - if (r < 0) { - log_warning_link(link, "DHCP error: no netmask: %s", - strerror(-r)); - return r; - } - - prefixlen = net_netmask_to_prefixlen(&netmask); - - r = sd_dhcp_lease_get_router(lease, &gateway); - if (r < 0 && r != -ENOENT) { - log_warning_link(link, "DHCP error: could not get gateway: %s", - strerror(-r)); - return r; - } - - if (r >= 0) - log_struct_link(LOG_INFO, link, - "MESSAGE=%-*s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", - IFNAMSIZ, - link->ifname, - ADDRESS_FMT_VAL(address), - prefixlen, - ADDRESS_FMT_VAL(gateway), - "ADDRESS=%u.%u.%u.%u", - ADDRESS_FMT_VAL(address), - "PREFIXLEN=%u", - prefixlen, - "GATEWAY=%u.%u.%u.%u", - ADDRESS_FMT_VAL(gateway), - NULL); - else - log_struct_link(LOG_INFO, link, - "MESSAGE=%-*s: DHCPv4 address %u.%u.%u.%u/%u", - IFNAMSIZ, - link->ifname, - ADDRESS_FMT_VAL(address), - prefixlen, - "ADDRESS=%u.%u.%u.%u", - ADDRESS_FMT_VAL(address), - "PREFIXLEN=%u", - prefixlen, - NULL); - - link->dhcp_lease = lease; - - if (link->network->dhcp_mtu) { - uint16_t mtu; - - r = sd_dhcp_lease_get_mtu(lease, &mtu); - if (r >= 0) { - r = link_set_mtu(link, mtu); - if (r < 0) - log_error_link(link, "Failed to set MTU " - "to %" PRIu16, mtu); - } - } - - if (link->network->dhcp_hostname) { - const char *hostname; - - r = sd_dhcp_lease_get_hostname(lease, &hostname); - if (r >= 0) { - r = link_set_hostname(link, hostname); - if (r < 0) - log_error_link(link, "Failed to set transient hostname " - "to '%s'", hostname); - } - } - - link_enter_set_addresses(link); - - return 0; -} - -static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) { - Link *link = userdata; - int r = 0; - - assert(link); - assert(link->network); - assert(link->manager); - - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return; - - switch (event) { - case DHCP_EVENT_EXPIRED: - case DHCP_EVENT_STOP: - case DHCP_EVENT_IP_CHANGE: - if (link->network->dhcp_critical) { - log_error_link(link, "DHCPv4 connection considered system critical, " - "ignoring request to reconfigure it."); - return; - } - - if (link->dhcp_lease) { - r = dhcp_lease_lost(link); - if (r < 0) { - link_enter_failed(link); - return; - } - } - - if (event == DHCP_EVENT_IP_CHANGE) { - r = dhcp_lease_acquired(client, link); - if (r < 0) { - link_enter_failed(link); - return; - } - } - - if (event == DHCP_EVENT_EXPIRED && link->network->ipv4ll) { - if (!sd_ipv4ll_is_running(link->ipv4ll)) - r = sd_ipv4ll_start(link->ipv4ll); - else if (ipv4ll_is_bound(link->ipv4ll)) - r = ipv4ll_address_update(link, false); - if (r < 0) { - link_enter_failed(link); - return; - } - } - - break; - case DHCP_EVENT_RENEW: - r = dhcp_lease_renew(client, link); - if (r < 0) { - link_enter_failed(link); - return; - } - break; - case DHCP_EVENT_IP_ACQUIRE: - r = dhcp_lease_acquired(client, link); - if (r < 0) { - link_enter_failed(link); - return; - } - if (link->ipv4ll) { - if (ipv4ll_is_bound(link->ipv4ll)) - r = ipv4ll_address_update(link, true); - else - r = sd_ipv4ll_stop(link->ipv4ll); - if (r < 0) { - link_enter_failed(link); - return; - } - } - break; - default: - if (event < 0) - log_warning_link(link, "DHCP error: client failed: %s", strerror(-event)); - else - log_warning_link(link, "DHCP unknown event: %d", event); - break; - } - - return; -} - -static int ipv4ll_address_update(Link *link, bool deprecate) { - int r; - struct in_addr addr; - - assert(link); - - r = sd_ipv4ll_get_address(link->ipv4ll, &addr); - if (r >= 0) { - _cleanup_address_free_ Address *address = NULL; - - log_debug_link(link, "IPv4 link-local %s %u.%u.%u.%u", - deprecate ? "deprecate" : "approve", - ADDRESS_FMT_VAL(addr)); - - r = address_new_dynamic(&address); - if (r < 0) { - log_error_link(link, "Could not allocate address: %s", strerror(-r)); - return r; - } - - address->family = AF_INET; - address->in_addr.in = addr; - address->prefixlen = 16; - address->scope = RT_SCOPE_LINK; - address->cinfo.ifa_prefered = deprecate ? 0 : CACHE_INFO_INFINITY_LIFE_TIME; - address->broadcast.s_addr = address->in_addr.in.s_addr | htonl(0xfffffffflu >> address->prefixlen); - - address_update(address, link, &address_update_handler); - } - - return 0; - -} - -static int ipv4ll_address_lost(Link *link) { - int r; - struct in_addr addr; - - assert(link); - - r = sd_ipv4ll_get_address(link->ipv4ll, &addr); - if (r >= 0) { - _cleanup_address_free_ Address *address = NULL; - _cleanup_route_free_ Route *route = NULL; - - log_debug_link(link, "IPv4 link-local release %u.%u.%u.%u", - ADDRESS_FMT_VAL(addr)); - - r = address_new_dynamic(&address); - if (r < 0) { - log_error_link(link, "Could not allocate address: %s", strerror(-r)); - return r; - } - - address->family = AF_INET; - address->in_addr.in = addr; - address->prefixlen = 16; - address->scope = RT_SCOPE_LINK; - - address_drop(address, link, &address_drop_handler); - - r = route_new_dynamic(&route, RTPROT_UNSPEC); - if (r < 0) { - log_error_link(link, "Could not allocate route: %s", - strerror(-r)); - return r; - } - - route->family = AF_INET; - route->scope = RT_SCOPE_LINK; - route->metrics = 99; - - route_drop(route, link, &route_drop_handler); - } - - return 0; -} - -static bool ipv4ll_is_bound(sd_ipv4ll *ll) { - int r; - struct in_addr addr; - - assert(ll); - - r = sd_ipv4ll_get_address(ll, &addr); - if (r < 0) - return false; - return true; -} - -static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) { - struct in_addr address; - int r; - - assert(ll); - assert(link); - - r = sd_ipv4ll_get_address(ll, &address); - if (r < 0) - return r; - - log_struct_link(LOG_INFO, link, - "MESSAGE=%-*s: IPv4 link-local address %u.%u.%u.%u", - IFNAMSIZ, - link->ifname, - ADDRESS_FMT_VAL(address), - NULL); - - link_enter_set_addresses(link); - - return 0; -} - -static void ipv4ll_handler(sd_ipv4ll *ll, int event, void *userdata){ - Link *link = userdata; - int r; - - assert(link); - assert(link->network); - assert(link->manager); + } - if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) - return; + r = sd_rtnl_message_append_u32(req, IFLA_MTU, mtu); + if (r < 0) { + log_error_link(link, "Could not append MTU: %s", strerror(-r)); + return r; + } - switch(event) { - case IPV4LL_EVENT_STOP: - case IPV4LL_EVENT_CONFLICT: - r = ipv4ll_address_lost(link); - if (r < 0) { - link_enter_failed(link); - return; - } - break; - case IPV4LL_EVENT_BIND: - r = ipv4ll_address_claimed(ll, link); - if (r < 0) { - link_enter_failed(link); - return; - } - break; - default: - if (event < 0) - log_warning_link(link, "IPv4 link-local error: %s", strerror(-event)); - else - log_warning_link(link, "IPv4 link-local unknown event: %d", event); - break; + r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link, + 0, NULL); + if (r < 0) { + log_error_link(link, + "Could not send rtnetlink message: %s", + strerror(-r)); + return r; } + + link_ref(link); + + return 0; } static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) { @@ -1532,7 +937,8 @@ static int link_acquire_conf(Link *link) { r = sd_icmp6_router_solicitation_start(link->icmp6_router_discovery); if (r < 0) { - log_warning_link(link, "could not start IPv6 router discovery"); + log_warning_link(link, + "could not start IPv6 router discovery"); return r; } } @@ -1540,126 +946,20 @@ static int link_acquire_conf(Link *link) { return 0; } -bool link_has_carrier(unsigned flags, uint8_t operstate) { +bool link_has_carrier(Link *link) { /* see Documentation/networking/operstates.txt in the kernel sources */ - if (operstate == IF_OPER_UP) + if (link->kernel_operstate == IF_OPER_UP) return true; - if (operstate == IF_OPER_UNKNOWN) + if (link->kernel_operstate == IF_OPER_UNKNOWN) /* operstate may not be implemented, so fall back to flags */ - if ((flags & IFF_LOWER_UP) && !(flags & IFF_DORMANT)) + if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT)) return true; return false; } -#define FLAG_STRING(string, flag, old, new) \ - (((old ^ new) & flag) \ - ? ((old & flag) ? (" -" string) : (" +" string)) \ - : "") - -static int link_update_flags(Link *link, sd_rtnl_message *m) { - unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags; - uint8_t operstate; - bool carrier_gained = false, carrier_lost = false; - int r; - - assert(link); - - r = sd_rtnl_message_link_get_flags(m, &flags); - if (r < 0) { - log_warning_link(link, "Could not get link flags"); - return r; - } - - r = sd_rtnl_message_read_u8(m, IFLA_OPERSTATE, &operstate); - if (r < 0) - /* if we got a message without operstate, take it to mean - the state was unchanged */ - operstate = link->kernel_operstate; - - if ((link->flags == flags) && (link->kernel_operstate == operstate)) - return 0; - - if (link->flags != flags) { - log_debug_link(link, "flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", - FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), - FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), - FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), - FLAG_STRING("UP", IFF_UP, link->flags, flags), - FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), - FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), - FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), - FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), - FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), - FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), - FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), - FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), - FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), - FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), - FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), - FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), - FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), - FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), - FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); - - unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | - IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | - IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | - IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | - IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | - IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); - unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); - unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); - - /* link flags are currently at most 18 bits, let's align to printing 20 */ - if (unknown_flags_added) - log_debug_link(link, "unknown link flags gained: %#.5x (ignoring)", - unknown_flags_added); - - if (unknown_flags_removed) - log_debug_link(link, "unknown link flags lost: %#.5x (ignoring)", - unknown_flags_removed); - } - - carrier_gained = !link_has_carrier(link->flags, link->kernel_operstate) && - link_has_carrier(flags, operstate); - carrier_lost = link_has_carrier(link->flags, link->kernel_operstate) && - !link_has_carrier(flags, operstate); - - link->flags = flags; - link->kernel_operstate = operstate; - - link_save(link); - - if (link->state == LINK_STATE_FAILED || - link->state == LINK_STATE_UNMANAGED) - return 0; - - if (carrier_gained) { - log_info_link(link, "gained carrier"); - - if (link->network) { - r = link_acquire_conf(link); - if (r < 0) { - link_enter_failed(link); - return r; - } - } - } else if (carrier_lost) { - log_info_link(link, "lost carrier"); - - r = link_stop_clients(link); - if (r < 0) { - link_enter_failed(link); - return r; - } - } - - return 0; -} - static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; @@ -1703,14 +1003,17 @@ static int link_up(Link *link) { r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP); if (r < 0) { - log_error_link(link, "Could not set link flags: %s", strerror(-r)); + log_error_link(link, "Could not set link flags: %s", + strerror(-r)); return r; } - r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL); + r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, + 0, NULL); if (r < 0) { log_error_link(link, - "Could not send rtnetlink message: %s", strerror(-r)); + "Could not send rtnetlink message: %s", + strerror(-r)); return r; } @@ -1723,11 +1026,8 @@ static int link_joined(Link *link) { int r; assert(link); - assert(link->state == LINK_STATE_ENSLAVING); assert(link->network); - log_debug_link(link, "joined netdev"); - if (!(link->flags & IFF_UP)) { r = link_up(link); if (r < 0) { @@ -1739,13 +1039,12 @@ static int link_joined(Link *link) { return link_enter_set_addresses(link); } -static int netdev_join_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { +static int netdev_join_handler(sd_rtnl *rtnl, sd_rtnl_message *m, + void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; assert(link); - assert(IN_SET(link->state, LINK_STATE_ENSLAVING, LINK_STATE_FAILED, - LINK_STATE_LINGER)); assert(link->network); link->enslaving --; @@ -1763,7 +1062,8 @@ static int netdev_join_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata NULL); link_enter_failed(link); return 1; - } + } else + log_debug_link(link, "joined netdev"); if (link->enslaving <= 0) link_joined(link); @@ -1778,7 +1078,7 @@ static int link_enter_join_netdev(Link *link) { assert(link); assert(link->network); - assert(link->state == LINK_STATE_INITIALIZING); + assert(link->state == LINK_STATE_PENDING); link->state = LINK_STATE_ENSLAVING; @@ -1802,7 +1102,8 @@ static int link_enter_join_netdev(Link *link) { log_struct_link(LOG_WARNING, link, "MESSAGE=%-*s: could not join netdev '%s': %s", IFNAMSIZ, - link->ifname, link->network->bond->ifname, strerror(-r), + link->ifname, link->network->bond->ifname, + strerror(-r), NETDEVIF(link->network->bond), NULL); link_enter_failed(link); @@ -1820,12 +1121,14 @@ static int link_enter_join_netdev(Link *link) { NETDEVIF(link->network->bridge), NULL); - r = netdev_join(link->network->bridge, link, &netdev_join_handler); + r = netdev_join(link->network->bridge, link, + &netdev_join_handler); if (r < 0) { log_struct_link(LOG_WARNING, link, "MESSAGE=%-*s: could not join netdev '%s': %s", IFNAMSIZ, - link->ifname, link->network->bridge->ifname, strerror(-r), + link->ifname, link->network->bridge->ifname, + strerror(-r), NETDEVIF(link->network->bridge), NULL); link_enter_failed(link); @@ -1839,14 +1142,16 @@ static int link_enter_join_netdev(Link *link) { log_struct_link(LOG_DEBUG, link, "MESSAGE=%-*s: enslaving by '%s'", IFNAMSIZ, - link->ifname, netdev->ifname, NETDEVIF(netdev), NULL); + link->ifname, netdev->ifname, NETDEVIF(netdev), + NULL); r = netdev_join(netdev, link, &netdev_join_handler); if (r < 0) { log_struct_link(LOG_WARNING, link, "MESSAGE=%-*s: could not join netdev '%s': %s", IFNAMSIZ, - link->ifname, netdev->ifname, strerror(-r), + link->ifname, netdev->ifname, + strerror(-r), NETDEVIF(netdev), NULL); link_enter_failed(link); return r; @@ -1862,99 +1167,19 @@ static int link_configure(Link *link) { int r; assert(link); - assert(link->state == LINK_STATE_INITIALIZING); + assert(link->network); + assert(link->state == LINK_STATE_PENDING); if (link->network->ipv4ll) { - uint8_t seed[8]; - - r = sd_ipv4ll_new(&link->ipv4ll); - if (r < 0) - return r; - - if (link->udev_device) { - r = net_get_unique_predictable_data(link->udev_device, seed); - if (r >= 0) { - r = sd_ipv4ll_set_address_seed(link->ipv4ll, seed); - if (r < 0) - return r; - } - } - - r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0); - if (r < 0) - return r; - - r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac); - if (r < 0) - return r; - - r = sd_ipv4ll_set_index(link->ipv4ll, link->ifindex); - if (r < 0) - return r; - - r = sd_ipv4ll_set_callback(link->ipv4ll, ipv4ll_handler, link); + r = ipv4ll_configure(link); if (r < 0) return r; } if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4)) { - r = sd_dhcp_client_new(&link->dhcp_client); - if (r < 0) - return r; - - r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0); - if (r < 0) - return r; - - r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac); - if (r < 0) - return r; - - r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex); - if (r < 0) - return r; - - r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp_handler, link); - if (r < 0) - return r; - - r = sd_dhcp_client_set_request_broadcast(link->dhcp_client, link->network->dhcp_broadcast); + r = dhcp4_configure(link); if (r < 0) return r; - - if (link->network->dhcp_mtu) { - r = sd_dhcp_client_set_request_option(link->dhcp_client, 26); - if (r < 0) - return r; - } - - if (link->network->dhcp_routes) { - r = sd_dhcp_client_set_request_option(link->dhcp_client, DHCP_OPTION_STATIC_ROUTE); - if (r < 0) - return r; - r = sd_dhcp_client_set_request_option(link->dhcp_client, DHCP_OPTION_CLASSLESS_STATIC_ROUTE); - if (r < 0) - return r; - } - - if (link->network->dhcp_sendhost) { - _cleanup_free_ char *hostname = gethostname_malloc(); - if (!hostname) - return -ENOMEM; - - if (!is_localhost(hostname)) { - r = sd_dhcp_client_set_hostname(link->dhcp_client, hostname); - if (r < 0) - return r; - } - } - - if (link->network->dhcp_vendor_class_identifier) { - r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client, - link->network->dhcp_vendor_class_identifier); - if (r < 0) - return r; - } } if (link->network->dhcp_server) { @@ -1993,7 +1218,7 @@ static int link_configure(Link *link) { return r; } - if (link_has_carrier(link->flags, link->kernel_operstate)) { + if (link_has_carrier(link)) { r = link_acquire_conf(link); if (r < 0) return r; @@ -2002,7 +1227,8 @@ static int link_configure(Link *link) { return link_enter_join_netdev(link); } -static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { +static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m, + void *userdata) { _cleanup_link_unref_ Link *link = userdata; Network *network; int r; @@ -2011,12 +1237,13 @@ static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m, void * assert(link->ifname); assert(link->manager); - if (link->state != LINK_STATE_INITIALIZING) + if (link->state != LINK_STATE_PENDING) return 1; log_debug_link(link, "link state is up-to-date"); - r = network_get(link->manager, link->udev_device, link->ifname, &link->mac, &network); + r = network_get(link->manager, link->udev_device, link->ifname, + &link->mac, &network); if (r == -ENOENT) { link_enter_unmanaged(link); return 1; @@ -2043,7 +1270,7 @@ int link_initialized(Link *link, struct udev_device *device) { assert(link->manager->rtnl); assert(device); - if (link->state != LINK_STATE_INITIALIZING) + if (link->state != LINK_STATE_PENDING) return 0; if (link->udev_device) @@ -2053,16 +1280,18 @@ int link_initialized(Link *link, struct udev_device *device) { 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 */ + /* 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); + r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, + link->ifindex); if (r < 0) return r; - r = sd_rtnl_call_async(link->manager->rtnl, req, link_initialized_and_synced, link, 0, NULL); + r = sd_rtnl_call_async(link->manager->rtnl, req, + link_initialized_and_synced, link, 0, NULL); if (r < 0) return r; @@ -2071,13 +1300,16 @@ 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) { +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]; + char valid_buf[FORMAT_TIMESPAN_MAX]; + const char *valid_str = NULL; bool address_dropped = false; int r, ifindex; @@ -2109,36 +1341,50 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *use 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"); + 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"); + 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"); + log_warning_link(link, + "rtnl: received address with invalid scope, ignoring"); + return 0; + } + + r = sd_rtnl_message_addr_get_flags(message, &address->flags); + if (r < 0) { + log_warning_link(link, + "rtnl: received address with invalid flags, ignoring"); return 0; } switch (address->family) { case AF_INET: - r = sd_rtnl_message_read_in_addr(message, IFA_LOCAL, &address->in_addr.in); + 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"); + 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); + 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"); + log_warning_link(link, + "rtnl: received address without valid address, ignoring"); return 0; } @@ -2148,11 +1394,23 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *use assert_not_reached("invalid address family"); } - if (!inet_ntop(address->family, &address->in_addr, buf, INET6_ADDRSTRLEN)) { + if (!inet_ntop(address->family, &address->in_addr, buf, + INET6_ADDRSTRLEN)) { log_warning_link(link, "could not print address"); return 0; } + r = sd_rtnl_message_read_cache_info(message, IFA_CACHEINFO, + &address->cinfo); + if (r >= 0) { + if (address->cinfo.ifa_valid == CACHE_INFO_INFINITY_LIFE_TIME) + valid_str = "ever"; + else + valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX, + address->cinfo.ifa_valid * USEC_PER_SEC, + USEC_PER_SEC); + } + LIST_FOREACH(addresses, ad, link->addresses) { if (address_equal(ad, address)) { LIST_REMOVE(addresses, link->addresses, ad); @@ -2168,11 +1426,13 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *use switch (type) { case RTM_NEWADDR: if (!address_dropped) - log_debug_link(link, "added address: %s/%u", buf, - address->prefixlen); + log_debug_link(link, "added address: %s/%u (valid for %s)", + buf, address->prefixlen, + strna(valid_str)); else - log_debug_link(link, "updated address: %s/%u", buf, - address->prefixlen); + log_debug_link(link, "updated address: %s/%u (valid for %s)", + buf, address->prefixlen, + strna(valid_str)); LIST_PREPEND(addresses, link->addresses, address); address = NULL; @@ -2182,13 +1442,16 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *use break; case RTM_DELADDR: if (address_dropped) { - log_debug_link(link, "removed address: %s/%u", buf, - address->prefixlen); + log_debug_link(link, "removed address: %s/%u (valid for %s)", + buf, address->prefixlen, + strna(valid_str)); link_save(link); } else - log_warning_link(link, "removing non-existent address: %s/%u", - buf, address->prefixlen); + log_warning_link(link, + "removing non-existent address: %s/%u (valid for %s)", + buf, address->prefixlen, + strna(valid_str)); break; default: @@ -2218,11 +1481,13 @@ int link_add(Manager *m, sd_rtnl_message *message, Link **ret) { log_debug_link(link, "link %d added", link->ifindex); - r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, link->ifindex, 0); + 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); + r = sd_rtnl_call_async(m->rtnl, req, link_get_address_handler, link, 0, + NULL); if (r < 0) return r; @@ -2233,13 +1498,14 @@ int link_add(Manager *m, sd_rtnl_message *message, Link **ret) { sprintf(ifindex_str, "n%d", link->ifindex); device = udev_device_new_from_device_id(m->udev, ifindex_str); if (!device) { - log_warning_link(link, "could not find udev device"); + log_warning_link(link, + "could not find udev device: %m"); return -errno; } if (udev_device_get_is_initialized(device) <= 0) { /* not yet ready */ - log_debug_link(link, "udev initializing link..."); + log_debug_link(link, "link pending udev initialization..."); return 0; } @@ -2261,6 +1527,8 @@ int link_add(Manager *m, sd_rtnl_message *message, Link **ret) { int link_update(Link *link, sd_rtnl_message *m) { struct ether_addr mac; const char *ifname; + uint32_t mtu; + bool had_carrier, carrier_gained, carrier_lost; int r; assert(link); @@ -2283,20 +1551,36 @@ int link_update(Link *link, sd_rtnl_message *m) { return -ENOMEM; } - if (!link->original_mtu) { - r = sd_rtnl_message_read_u16(m, IFLA_MTU, &link->original_mtu); - if (r >= 0) + r = sd_rtnl_message_read_u32(m, IFLA_MTU, &mtu); + if (r >= 0 && mtu > 0) { + link->mtu = mtu; + if (!link->original_mtu) { + link->original_mtu = mtu; log_debug_link(link, "saved original MTU: %" - PRIu16, link->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_warning_link(link, + "Could not update MTU in DHCP client: %s", + strerror(-r)); + return r; + } + } } /* The kernel may broadcast NEWLINK messages without the MAC address set, simply ignore them. */ r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &mac); if (r >= 0) { - if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN)) { + 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); + memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, + ETH_ALEN); log_debug_link(link, "MAC address: " "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", @@ -2310,18 +1594,19 @@ int link_update(Link *link, sd_rtnl_message *m) { if (link->ipv4ll) { r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac); if (r < 0) { - log_warning_link(link, "Could not update MAC " - "address in IPv4LL client: %s", + log_warning_link(link, + "Could not update MAC address in IPv4LL client: %s", strerror(-r)); return r; } } if (link->dhcp_client) { - r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac); + r = sd_dhcp_client_set_mac(link->dhcp_client, + &link->mac); if (r < 0) { - log_warning_link(link, "Could not update MAC " - "address in DHCP client: %s", + log_warning_link(link, + "Could not update MAC address in DHCP client: %s", strerror(-r)); return r; } @@ -2331,7 +1616,8 @@ int link_update(Link *link, sd_rtnl_message *m) { r = sd_dhcp6_client_set_mac(link->dhcp6_client, &link->mac); if (r < 0) { - log_warning_link(link, "Could not update MAC address in DHCPv6 client: %s", + log_warning_link(link, + "Could not update MAC address in DHCPv6 client: %s", strerror(-r)); return r; } @@ -2339,7 +1625,36 @@ int link_update(Link *link, sd_rtnl_message *m) { } } - return link_update_flags(link, m); + had_carrier = link_has_carrier(link); + + r = link_update_flags(link, m); + 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_info_link(link, "gained carrier"); + + if (link->network) { + r = link_acquire_conf(link); + if (r < 0) { + link_enter_failed(link); + return r; + } + } + } else if (carrier_lost) { + log_info_link(link, "lost carrier"); + + r = link_stop_clients(link); + if (r < 0) { + link_enter_failed(link); + return r; + } + } + + return 0; } static void link_update_operstate(Link *link) { @@ -2348,12 +1663,15 @@ static void link_update_operstate(Link *link) { if (link->kernel_operstate == IF_OPER_DORMANT) link->operstate = LINK_OPERSTATE_DORMANT; - else if (link_has_carrier(link->flags, link->kernel_operstate)) { + else if (link_has_carrier(link)) { 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->flags & (IFA_F_TENTATIVE | IFA_F_DEPRECATED)) + continue; + if (address->scope < scope) scope = address->scope; } @@ -2367,8 +1685,10 @@ static void link_update_operstate(Link *link) { else /* no useful addresses found */ link->operstate = LINK_OPERSTATE_CARRIER; - } else - link->operstate = LINK_OPERSTATE_UNKNOWN; + } else if (link->flags & IFF_UP) + link->operstate = LINK_OPERSTATE_NO_CARRIER; + else + link->operstate = LINK_OPERSTATE_OFF; } int link_save(Link *link) { @@ -2401,7 +1721,7 @@ int link_save(Link *link) { r = fopen_temporary(link->state_file, &f, &temp_path); if (r < 0) - goto finish; + return r; fchmod(fileno(f), 0644); @@ -2412,9 +1732,17 @@ int link_save(Link *link) { admin_state, oper_state); if (link->network) { - char **address; + char **address, **domain; + bool space; fputs("DNS=", f); + space = false; + STRV_FOREACH(address, link->network->dns) { + if (space) + fputc(' ', f); + fputs(*address, f); + space = true; + } if (link->network->dhcp_dns && link->dhcp_lease) { @@ -2422,19 +1750,22 @@ int link_save(Link *link) { r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses); if (r > 0) { + if (space) + fputc(' ', f); serialize_in_addrs(f, addresses, r); - if (link->network->dns) - fputs(" ", f); } } - STRV_FOREACH(address, link->network->dns) - fprintf(f, "%s%s", *address, - (address + 1 ? " " : "")); - fputs("\n", f); fprintf(f, "NTP="); + space = false; + STRV_FOREACH(address, link->network->ntp) { + if (space) + fputc(' ', f); + fputs(*address, f); + space = true; + } if (link->network->dhcp_ntp && link->dhcp_lease) { @@ -2442,17 +1773,42 @@ int link_save(Link *link) { r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses); if (r > 0) { + if (space) + fputc(' ', f); serialize_in_addrs(f, addresses, r); - if (link->network->ntp) - fputs(" ", f); } } - STRV_FOREACH(address, link->network->ntp) - fprintf(f, "%s%s", *address, - (address + 1 ? " " : "")); + fputs("\n", f); + + fprintf(f, "DOMAINS="); + space = false; + STRV_FOREACH(domain, link->network->domains) { + if (space) + fputc(' ', f); + fputs(*domain, f); + space = true; + } + + if (link->network->dhcp_domains && + link->dhcp_lease) { + const char *domainname; + + r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname); + if (r >= 0) { + if (space) + fputc(' ', f); + fputs(domainname, f); + } + } fputs("\n", f); + + fprintf(f, "WILDCARD_DOMAIN=%s\n", + yes_no(link->network->wildcard_domain)); + + fprintf(f, "LLMNR=%s\n", + llmnr_support_to_string(link->network->llmnr)); } if (link->dhcp_lease) { @@ -2460,7 +1816,7 @@ int link_save(Link *link) { r = dhcp_lease_save(link->dhcp_lease, link->lease_file); if (r < 0) - goto finish; + goto fail; fprintf(f, "DHCP_LEASE=%s\n", @@ -2468,23 +1824,25 @@ int link_save(Link *link) { } else unlink(link->lease_file); - fflush(f); + r = fflush_and_check(f); + if (r < 0) + goto fail; - if (ferror(f) || rename(temp_path, link->state_file) < 0) { + if (rename(temp_path, link->state_file) < 0) { r = -errno; - unlink(link->state_file); - unlink(temp_path); + goto fail; } -finish: - if (r < 0) - log_error_link(link, "Failed to save link data to %s: %s", link->state_file, strerror(-r)); - + return 0; +fail: + log_error_link(link, "Failed to save link data to %s: %s", link->state_file, strerror(-r)); + unlink(link->state_file); + unlink(temp_path); return r; } static const char* const link_state_table[_LINK_STATE_MAX] = { - [LINK_STATE_INITIALIZING] = "initializing", + [LINK_STATE_PENDING] = "pending", [LINK_STATE_ENSLAVING] = "configuring", [LINK_STATE_SETTING_ADDRESSES] = "configuring", [LINK_STATE_SETTING_ROUTES] = "configuring", @@ -2497,7 +1855,8 @@ 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_OFF] = "off", + [LINK_OPERSTATE_NO_CARRIER] = "no-carrier", [LINK_OPERSTATE_DORMANT] = "dormant", [LINK_OPERSTATE_CARRIER] = "carrier", [LINK_OPERSTATE_DEGRADED] = "degraded", @@ -2505,55 +1864,3 @@ static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = { }; DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState); - -static const char* const dhcp_support_table[_DHCP_SUPPORT_MAX] = { - [DHCP_SUPPORT_NONE] = "none", - [DHCP_SUPPORT_BOTH] = "both", - [DHCP_SUPPORT_V4] = "v4", - [DHCP_SUPPORT_V6] = "v6", -}; - -DEFINE_STRING_TABLE_LOOKUP(dhcp_support, DHCPSupport); - -int config_parse_dhcp( - const char* unit, - const char *filename, - unsigned line, - const char *section, - unsigned section_line, - const char *lvalue, - int ltype, - const char *rvalue, - void *data, - void *userdata) { - - DHCPSupport *dhcp = data; - int k; - - assert(filename); - assert(lvalue); - assert(rvalue); - assert(data); - - /* Our enum shall be a superset of booleans, hence first try - * to parse as boolean, and then as enum */ - - k = parse_boolean(rvalue); - if (k > 0) - *dhcp = DHCP_SUPPORT_BOTH; - else if (k == 0) - *dhcp = DHCP_SUPPORT_NONE; - else { - DHCPSupport s; - - s = dhcp_support_from_string(rvalue); - if (s < 0){ - log_syntax(unit, LOG_ERR, filename, line, -s, "Failed to parse DHCP option, ignoring: %s", rvalue); - return 0; - } - - *dhcp = s; - } - - return 0; -}