#include "networkd.h"
#include "libudev-private.h"
+#include "udev-util.h"
#include "util.h"
+#include "virt.h"
#include "bus-util.h"
-#include "net-util.h"
+#include "network-internal.h"
+#include "network-util.h"
#include "dhcp-lease-internal.h"
-int link_new(Manager *manager, struct udev_device *device, Link **ret) {
- _cleanup_link_free_ Link *link = NULL;
- const char *mac;
- struct ether_addr *mac_addr;
- const char *ifname;
- int r;
+static int ipv4ll_address_update(Link *link, bool deprecate);
+static bool ipv4ll_is_bound(sd_ipv4ll *ll);
+
+static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) {
+ _cleanup_link_unref_ Link *link = NULL;
+ uint16_t type;
+ char *ifname;
+ int r, ifindex;
assert(manager);
assert(manager->links);
- assert(device);
+ assert(message);
assert(ret);
+ r = sd_rtnl_message_get_type(message, &type);
+ if (r < 0)
+ return r;
+ else if (type != RTM_NEWLINK)
+ return -EINVAL;
+
+ r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
+ if (r < 0)
+ return r;
+ else if (ifindex <= 0)
+ return -EINVAL;
+
+ r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &ifname);
+ if (r < 0)
+ return r;
+
link = new0(Link, 1);
if (!link)
return -ENOMEM;
+ link->n_ref = 1;
link->manager = manager;
- link->state = _LINK_STATE_INVALID;
-
- link->ifindex = udev_device_get_ifindex(device);
- if (link->ifindex <= 0)
- return -EINVAL;
+ link->state = LINK_STATE_INITIALIZING;
+ link->ifindex = ifindex;
+ link->ifname = strdup(ifname);
+ if (!link->ifname)
+ return -ENOMEM;
- r = asprintf(&link->state_file, "/run/systemd/network/links/%u",
- (unsigned) link->ifindex);
+ r = sd_rtnl_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
if (r < 0)
return r;
- mac = udev_device_get_sysattr_value(device, "address");
- if (mac) {
- mac_addr = ether_aton(mac);
- if (mac_addr)
- memcpy(&link->mac, mac_addr, sizeof(struct ether_addr));
- }
+ r = asprintf(&link->state_file, "/run/systemd/netif/links/%"PRIu64,
+ link->ifindex);
+ if (r < 0)
+ return -ENOMEM;
- ifname = udev_device_get_sysname(device);
- link->ifname = strdup(ifname);
+ r = asprintf(&link->lease_file, "/run/systemd/netif/leases/%"PRIu64,
+ link->ifindex);
+ if (r < 0)
+ return -ENOMEM;
r = hashmap_put(manager->links, &link->ifindex, link);
if (r < 0)
return 0;
}
-void link_free(Link *link) {
+static void link_free(Link *link) {
+ Address *address;
+
if (!link)
return;
assert(link->manager);
- sd_dhcp_client_free(link->dhcp_client);
+ 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);
- sd_ipv4ll_free(link->ipv4ll);
+ unlink(link->lease_file);
+ free(link->lease_file);
+
+ sd_ipv4ll_unref(link->ipv4ll);
hashmap_remove(link->manager->links, &link->ifindex);
free(link->ifname);
+
+ unlink(link->state_file);
free(link->state_file);
+ udev_device_unref(link->udev_device);
+
free(link);
}
+Link *link_unref(Link *link) {
+ if (link && (-- link->n_ref <= 0))
+ link_free(link);
+
+ return NULL;
+}
+
+Link *link_ref(Link *link) {
+ if (link)
+ assert_se(++ link->n_ref >= 2);
+
+ return link;
+}
+
int link_get(Manager *m, int ifindex, Link **ret) {
Link *link;
uint64_t ifindex_64;
return 0;
}
-int link_add(Manager *m, struct udev_device *device, Link **ret) {
- Link *link = NULL;
- Network *network;
- int r;
+void link_drop(Link *link) {
+ if (!link || link->state == LINK_STATE_LINGER)
+ return;
- assert(m);
- assert(device);
+ link->state = LINK_STATE_LINGER;
- r = link_new(m, device, &link);
- if (r < 0)
- return r;
+ log_debug_link(link, "link removed");
- *ret = link;
+ link_unref(link);
- r = network_get(m, device, &network);
- if (r < 0)
- return r == -ENOENT ? 0 : r;
+ return;
+}
- r = network_apply(m, network, link);
- if (r < 0)
- return r;
+static void link_enter_unmanaged(Link *link) {
+ assert(link);
- return 0;
+ log_debug_link(link, "unmanaged");
+
+ link->state = LINK_STATE_UNMANAGED;
+
+ link_save(link);
}
-static int link_enter_configured(Link *link) {
+static int link_stop_clients(Link *link) {
+ int r = 0, k;
+
assert(link);
- assert(link->state == LINK_STATE_SETTING_ROUTES);
+ assert(link->manager);
+ assert(link->manager->event);
- log_info_link(link, "link configured");
+ if (!link->network)
+ return 0;
- link->state = LINK_STATE_CONFIGURED;
+ if (link->network->dhcp) {
+ assert(link->dhcp_client);
- link_save(link);
+ k = sd_dhcp_client_stop(link->dhcp_client);
+ if (k < 0) {
+ log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r));
+ r = k;
+ }
+ }
- return 0;
+ if (link->network->ipv4ll) {
+ assert(link->ipv4ll);
+
+ k = sd_ipv4ll_stop(link->ipv4ll);
+ if (k < 0) {
+ log_warning_link(link, "Could not stop IPv4 link-local: %s", strerror(-r));
+ r = k;
+ }
+ }
+
+ 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;
}
static void link_enter_failed(Link *link) {
assert(link);
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+ return;
+
log_warning_link(link, "failed");
link->state = LINK_STATE_FAILED;
+ link_stop_clients(link);
+
+ link_save(link);
+}
+
+static int 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) {
int r;
assert(link->route_messages > 0);
- assert(link->state == LINK_STATE_SETTING_ADDRESSES ||
- link->state == LINK_STATE_SETTING_ROUTES ||
- link->state == LINK_STATE_FAILED);
+ assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
+ LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
+ LINK_STATE_LINGER));
link->route_messages --;
- if (link->state == LINK_STATE_FAILED)
+ if (IN_SET(LINK_STATE_FAILED, LINK_STATE_LINGER)) {
+ link_unref(link);
return 1;
+ }
r = sd_rtnl_message_get_errno(m);
if (r < 0 && r != -EEXIST)
log_struct_link(LOG_WARNING, link,
- "MESSAGE=%s: could not set route: %s",
+ "MESSAGE=%*s: could not set route: %s",
+ IFNAMSIZ,
link->ifname, strerror(-r),
"ERRNO=%d", -r,
NULL);
link_enter_configured(link);
}
+ link_unref(link);
+
return 1;
}
static int link_enter_set_routes(Link *link) {
Route *rt;
- struct in_addr a;
int r;
assert(link);
link->state = LINK_STATE_SETTING_ROUTES;
if (!link->network->static_routes && !link->dhcp_lease &&
- (!link->ipv4ll || sd_ipv4ll_get_address(link->ipv4ll, &a) < 0))
+ (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false))
return link_enter_configured(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,
return r;
}
+ link_ref(link);
link->route_messages ++;
}
return r;
}
+ link_ref(link);
link->route_messages ++;
}
}
if (link->dhcp_lease) {
_cleanup_route_free_ Route *route = NULL;
+ _cleanup_route_free_ Route *route_gw = NULL;
struct in_addr gateway;
r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
- if (r < 0) {
- log_warning_link(link, "DHCP error: no router: %s",
- strerror(-r));
+ if (r < 0 && r != -ENOENT) {
+ log_warning_link(link, "DHCP error: %s", strerror(-r));
return r;
}
- r = route_new_dynamic(&route);
- if (r < 0) {
- log_error_link(link, "Could not allocate route: %s",
- strerror(-r));
- return r;
- }
+ if (r >= 0) {
+ r = route_new_dynamic(&route);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate route: %s",
+ strerror(-r));
+ return r;
+ }
- route->family = AF_INET;
- route->in_addr.in = gateway;
+ r = route_new_dynamic(&route_gw);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate route: %s",
+ strerror(-r));
+ return r;
+ }
- 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;
+ /* The dhcp netmask may mask out the gateway. Add an explicit
+ * route for the gw host so that we can route no matter the
+ * netmask or existing kernel route tables. */
+ route_gw->family = AF_INET;
+ route_gw->dst_addr.in = gateway;
+ route_gw->dst_prefixlen = 32;
+ route_gw->scope = RT_SCOPE_LINK;
+
+ r = route_configure(route_gw, link, &route_handler);
+ if (r < 0) {
+ log_warning_link(link,
+ "could not set host route: %s", strerror(-r));
+ return r;
+ }
+
+ link_ref(link);
+ link->route_messages ++;
+
+ route->family = AF_INET;
+ route->in_addr.in = gateway;
+
+ r = route_configure(route, link, &route_handler);
+ if (r < 0) {
+ log_warning_link(link,
+ "could not set routes: %s", strerror(-r));
+ link_enter_failed(link);
+ return r;
+ }
+
+ link_ref(link);
+ link->route_messages ++;
}
+ }
- link->route_messages ++;
+ if (link->route_messages == 0) {
+ link_enter_configured(link);
}
return 0;
assert(link);
assert(link->ifname);
- if (link->state == LINK_STATE_FAILED)
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
+ link_unref(link);
return 1;
+ }
r = sd_rtnl_message_get_errno(m);
- if (r < 0 && r != -ENOENT)
+ 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);
+ link_unref(link);
+
return 0;
}
assert(link);
assert(link->ifname);
assert(link->addr_messages > 0);
- assert(link->state == LINK_STATE_SETTING_ADDRESSES || link->state == LINK_STATE_FAILED);
+ assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
+ LINK_STATE_FAILED, LINK_STATE_LINGER));
link->addr_messages --;
- if (link->state == LINK_STATE_FAILED)
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
+ link_unref(link);
return 1;
+ }
r = sd_rtnl_message_get_errno(m);
if (r < 0 && r != -EEXIST)
log_struct_link(LOG_WARNING, link,
- "MESSAGE=%s: could not set address: %s",
+ "MESSAGE=%*s: could not set address: %s",
+ IFNAMSIZ,
link->ifname, strerror(-r),
"ERRNO=%d", -r,
NULL);
link_enter_set_routes(link);
}
+ link_unref(link);
+
return 1;
}
static int link_enter_set_addresses(Link *link) {
Address *ad;
- struct in_addr a;
int r;
assert(link);
link->state = LINK_STATE_SETTING_ADDRESSES;
if (!link->network->static_addresses && !link->dhcp_lease &&
- (!link->ipv4ll || sd_ipv4ll_get_address(link->ipv4ll, &a) < 0))
+ (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false))
return link_enter_set_routes(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,
return r;
}
+ link_ref(link);
link->addr_messages ++;
}
return r;
}
+ link_ref(link);
link->addr_messages ++;
}
}
return r;
}
+ link_ref(link);
link->addr_messages ++;
}
return 0;
}
-static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+static int address_update_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
Link *link = userdata;
int r;
assert(link);
assert(link->ifname);
- if (link->state == LINK_STATE_FAILED)
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
+ link_unref(link);
return 1;
+ }
r = sd_rtnl_message_get_errno(m);
if (r < 0 && r != -ENOENT)
log_struct_link(LOG_WARNING, link,
- "MESSAGE=%s: could not drop address: %s",
+ "MESSAGE=%*s: could not update address: %s",
+ IFNAMSIZ,
+ link->ifname, strerror(-r),
+ "ERRNO=%d", -r,
+ NULL);
+
+ link_unref(link);
+
+ return 0;
+}
+
+static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(m);
+ assert(link);
+ assert(link->ifname);
+
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
+ link_unref(link);
+ return 1;
+ }
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0 && r != -EADDRNOTAVAIL)
+ log_struct_link(LOG_WARNING, link,
+ "MESSAGE=%*s: could not drop address: %s",
+ IFNAMSIZ,
link->ifname, strerror(-r),
"ERRNO=%d", -r,
NULL);
+ link_unref(link);
+
return 0;
}
static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
+ Link *link = userdata;
int r;
+ assert(link);
+
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
+ link_unref(link);
+ return 1;
+ }
+
r = sd_bus_message_get_errno(m);
if (r < 0)
- log_warning("Could not set hostname: %s", strerror(-r));
+ log_warning_link(link, "Could not set hostname: %s", strerror(-r));
+
+ link_unref(link);
return 1;
}
-static int set_hostname(sd_bus *bus, const char *hostname) {
+static int link_set_hostname(Link *link, const char *hostname) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
int r = 0;
+ assert(link);
+ assert(link->manager);
assert(hostname);
- log_debug("Setting transient hostname: '%s'", hostname);
+ log_debug_link(link, "Setting transient hostname: '%s'", hostname);
- if (!bus) { /* TODO: replace by assert when we can rely on kdbus */
- log_info("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;
}
r = sd_bus_message_new_method_call(
- bus,
+ link->manager->bus,
&m,
"org.freedesktop.hostname1",
"/org/freedesktop/hostname1",
if (r < 0)
return r;
- r = sd_bus_call_async(bus, m, set_hostname_handler, NULL, 0, NULL);
+ r = sd_bus_call_async(link->manager->bus, NULL, m, set_hostname_handler, link, 0);
if (r < 0)
- log_error("Could not set transient hostname: %s", strerror(-r));
+ log_error_link(link, "Could not set transient hostname: %s", strerror(-r));
+
+ link_ref(link);
return r;
}
assert(link);
assert(link->ifname);
- if (link->state == LINK_STATE_FAILED)
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
+ link_unref(link);
return 1;
+ }
r = sd_rtnl_message_get_errno(m);
if (r < 0)
"ERRNO=%d", -r,
NULL);
+ link_unref(link);
+
return 1;
}
return r;
}
+ link_unref(link);
+
return 0;
}
static int dhcp_lease_lost(Link *link) {
_cleanup_address_free_ Address *address = NULL;
+ _cleanup_route_free_ Route *route_gw = NULL;
+ _cleanup_route_free_ Route *route = NULL;
struct in_addr addr;
struct in_addr netmask;
+ struct in_addr gateway;
unsigned prefixlen;
int r;
r = address_new_dynamic(&address);
if (r >= 0) {
+ r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
+ if (r >= 0) {
+ r = route_new_dynamic(&route_gw);
+ if (r >= 0) {
+ route_gw->family = AF_INET;
+ route_gw->dst_addr.in = gateway;
+ route_gw->dst_prefixlen = 32;
+ route_gw->scope = RT_SCOPE_LINK;
+
+ route_drop(route_gw, link, &route_drop_handler);
+ link_ref(link);
+ }
+
+ r = route_new_dynamic(&route);
+ if (r >= 0) {
+ route->family = AF_INET;
+ route->in_addr.in = gateway;
+
+ route_drop(route, link, &route_drop_handler);
+ link_ref(link);
+ }
+ }
+
sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
prefixlen = net_netmask_to_prefixlen(&netmask);
address->prefixlen = prefixlen;
address_drop(address, link, &address_drop_handler);
+ link_ref(link);
}
if (link->network->dhcp_mtu) {
r = sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname);
if (r >= 0 && hostname) {
- r = set_hostname(link->manager->bus, "");
+ r = link_set_hostname(link, "");
if (r < 0)
- log_error("Failed to reset transient hostname");
+ log_error_link(link, "Failed to reset transient hostname");
}
}
struct in_addr netmask;
struct in_addr gateway;
unsigned prefixlen;
- struct in_addr *nameservers;
- size_t nameservers_size;
int r;
assert(client);
prefixlen = net_netmask_to_prefixlen(&netmask);
r = sd_dhcp_lease_get_router(lease, &gateway);
- if (r < 0) {
- log_warning_link(link, "DHCP error: no router: %s",
- strerror(-r));
+ if (r < 0 && r != -ENOENT) {
+ log_warning_link(link, "DHCP error: %s", strerror(-r));
return r;
}
- log_struct_link(LOG_INFO, link,
- "MESSAGE=%s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
- 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);
+ 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_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;
r = sd_dhcp_lease_get_hostname(lease, &hostname);
if (r >= 0) {
- r = set_hostname(link->manager->bus, hostname);
+ 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);
}
}
static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
Link *link = userdata;
- int r;
+ int r = 0;
assert(link);
assert(link->network);
assert(link->manager);
- if (link->state == LINK_STATE_FAILED)
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return;
switch (event) {
}
if (event == DHCP_EVENT_EXPIRED && link->network->ipv4ll) {
- r = sd_ipv4ll_start (link->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;
return;
}
if (link->ipv4ll) {
- r = sd_ipv4ll_stop(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;
return;
}
-static int ipv4ll_address_lost(sd_ipv4ll *ll, Link *link) {
+static int ipv4ll_address_update(Link *link, bool deprecate) {
+ int r;
+ struct in_addr addr;
+
+ assert(link);
+
+ r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
+ if (r >= 0) {
+ _cleanup_address_free_ Address *address = NULL;
+
+ log_debug_link(link, "IPv4 link-local %s %u.%u.%u.%u",
+ deprecate ? "deprecate" : "approve",
+ ADDRESS_FMT_VAL(addr));
+
+ r = address_new_dynamic(&address);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate address: %s", strerror(-r));
+ return r;
+ }
+
+ address->family = AF_INET;
+ address->in_addr.in = addr;
+ address->prefixlen = 16;
+ address->scope = RT_SCOPE_LINK;
+ address->cinfo.ifa_prefered = deprecate ? 0 : CACHE_INFO_INFINITY_LIFE_TIME;
+ address->broadcast.s_addr = address->in_addr.in.s_addr | htonl(0xfffffffflu >> address->prefixlen);
+
+ address_update(address, link, &address_update_handler);
+ link_ref(link);
+ }
+
+ return 0;
+
+}
+
+static int ipv4ll_address_lost(Link *link) {
int r;
struct in_addr addr;
- assert(ll);
assert(link);
r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
address->scope = RT_SCOPE_LINK;
address_drop(address, link, &address_drop_handler);
+ link_ref(link);
r = route_new_dynamic(&route);
if (r < 0) {
route->metrics = 99;
route_drop(route, link, &route_drop_handler);
+ link_ref(link);
}
return 0;
}
+static bool ipv4ll_is_bound(sd_ipv4ll *ll) {
+ int r;
+ struct in_addr addr;
+
+ assert(ll);
+
+ r = sd_ipv4ll_get_address(ll, &addr);
+ if (r < 0)
+ return false;
+ return true;
+}
+
static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) {
struct in_addr address;
int r;
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);
assert(link->network);
assert(link->manager);
- switch(event) {
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+ return;
+
+ switch(event) {
case IPV4LL_EVENT_STOP:
case IPV4LL_EVENT_CONFLICT:
- r = ipv4ll_address_lost(ll, link);
+ r = ipv4ll_address_lost(link);
if (r < 0) {
link_enter_failed(link);
return;
assert(link->manager->event);
if (link->network->ipv4ll) {
- if (!link->ipv4ll) {
- r = sd_ipv4ll_new(&link->ipv4ll);
- if (r < 0)
- return r;
-
- r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
- if (r < 0)
- return r;
-
- r = sd_ipv4ll_set_index(link->ipv4ll, link->ifindex);
- if (r < 0)
- return r;
-
- r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
- if (r < 0)
- return r;
-
- r = sd_ipv4ll_set_callback(link->ipv4ll, ipv4ll_handler, link);
- if (r < 0)
- return r;
- }
+ assert(link->ipv4ll);
log_debug_link(link, "acquiring IPv4 link-local address");
r = sd_ipv4ll_start(link->ipv4ll);
- if (r < 0)
+ if (r < 0) {
+ log_warning_link(link, "could not acquire IPv4 "
+ "link-local address");
return r;
+ }
}
if (link->network->dhcp) {
- if (!link->dhcp_client) {
- 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_index(link->dhcp_client, link->ifindex);
- 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_callback(link->dhcp_client, dhcp_handler, link);
- if (r < 0)
- return r;
-
- if (link->network->dhcp_mtu) {
- r = sd_dhcp_client_set_request_option(link->dhcp_client, 26);
- if (r < 0)
- return r;
- }
- }
+ assert(link->dhcp_client);
log_debug_link(link, "acquiring DHCPv4 lease");
r = sd_dhcp_client_start(link->dhcp_client);
- if (r < 0)
+ if (r < 0) {
+ log_warning_link(link, "could not acquire DHCPv4 "
+ "lease");
return r;
+ }
}
return 0;
}
-static int link_update_flags(Link *link, unsigned flags) {
+bool link_has_carrier(unsigned flags, uint8_t operstate) {
+ /* see Documentation/networking/operstates.txt in the kernel sources */
+
+ if (operstate == IF_OPER_UP)
+ return true;
+
+ if (operstate == IF_OPER_UNKNOWN)
+ /* operstate may not be implemented, so fall back to flags */
+ if ((flags & IFF_LOWER_UP) && !(flags & IFF_DORMANT))
+ return true;
+
+ return false;
+}
+
+#define FLAG_STRING(string, flag, old, new) \
+ (((old ^ new) & flag) \
+ ? ((old & flag) ? (" -" string) : (" +" string)) \
+ : "")
+
+static int link_update_flags(Link *link, sd_rtnl_message *m) {
+ unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
+ uint8_t operstate;
+ bool carrier_gained = false, carrier_lost = false;
int r;
assert(link);
- assert(link->network);
- if (link->state == LINK_STATE_FAILED)
- return 0;
+ 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) {
- log_debug_link(link, "link status unchanged: %#.8x", flags);
+ 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);
}
- if ((link->flags & IFF_UP) != (flags & IFF_UP))
- log_info_link(link,
- "link is %s", flags & IFF_UP ? "up": "down");
+ 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);
- if ((link->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) {
- if (flags & IFF_LOWER_UP) {
- log_info_link(link, "carrier on");
+ link->flags = flags;
+ link->kernel_operstate = operstate;
- if (link->network->dhcp || link->network->ipv4ll) {
- r = link_acquire_conf(link);
- if (r < 0) {
- log_warning_link(link, "Could not acquire configuration: %s", strerror(-r));
- link_enter_failed(link);
- return r;
- }
- }
- } else {
- log_info_link(link, "carrier off");
+ link_save(link);
- if (link->network->dhcp) {
- r = sd_dhcp_client_stop(link->dhcp_client);
- if (r < 0) {
- log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r));
- link_enter_failed(link);
- return r;
- }
- }
+ if (link->state == LINK_STATE_FAILED ||
+ link->state == LINK_STATE_UNMANAGED)
+ return 0;
- if (link->network->ipv4ll) {
- r = sd_ipv4ll_stop(link->ipv4ll);
- if (r < 0) {
- log_warning_link(link, "Could not stop IPv4 link-local: %s", strerror(-r));
- link_enter_failed(link);
- return r;
- }
+ 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");
- log_debug_link(link,
- "link status updated: %#.8x -> %#.8x", link->flags, flags);
-
- link->flags = flags;
+ r = link_stop_clients(link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return r;
+ }
+ }
return 0;
}
assert(link);
- if (link->state == LINK_STATE_FAILED)
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
+ link_unref(link);
return 1;
+ }
r = sd_rtnl_message_get_errno(m);
- if (r >= 0)
- link_update_flags(link, link->flags | IFF_UP);
- else
+ if (r < 0) {
+ /* we warn but don't fail the link, as it may
+ be brought up later */
log_struct_link(LOG_WARNING, link,
- "MESSAGE=%s: could not bring up interface: %s",
+ "MESSAGE=%*s: could not bring up interface: %s",
+ IFNAMSIZ,
link->ifname, strerror(-r),
"ERRNO=%d", -r,
NULL);
+ }
+
+ link_unref(link);
+
return 1;
}
return r;
}
+ link_ref(link);
+
return 0;
}
assert(link->state == LINK_STATE_ENSLAVING);
assert(link->network);
- r = link_up(link);
- if (r < 0) {
- link_enter_failed(link);
- return r;
+ if (!(link->flags & IFF_UP)) {
+ r = link_up(link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return r;
+ }
}
if (!link->network->dhcp && !link->network->ipv4ll)
int r;
assert(link);
- assert(link->state == LINK_STATE_ENSLAVING || link->state == LINK_STATE_FAILED);
+ assert(IN_SET(link->state, LINK_STATE_ENSLAVING, LINK_STATE_FAILED,
+ LINK_STATE_LINGER));
assert(link->network);
link->enslaving --;
- if (link->state == LINK_STATE_FAILED)
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
+ link_unref(link);
return 1;
+ }
r = sd_rtnl_message_get_errno(m);
if (r < 0) {
log_struct_link(LOG_ERR, link,
- "MESSAGE=%s: could not enslave: %s",
+ "MESSAGE=%*s: could not enslave: %s",
+ IFNAMSIZ,
link->ifname, strerror(-r),
"ERRNO=%d", -r,
NULL);
link_enter_failed(link);
+ link_unref(link);
return 1;
}
if (link->enslaving == 0)
link_enslaved(link);
+ link_unref(link);
+
return 1;
}
assert(link);
assert(link->network);
- assert(link->state == _LINK_STATE_INVALID);
+ assert(link->state == LINK_STATE_INITIALIZING);
link->state = LINK_STATE_ENSLAVING;
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'",
+ IFNAMSIZ,
+ link->ifname, link->network->bond->ifname,
+ NETDEV(link->network->bond),
+ NULL);
+
+ r = netdev_enslave(link->network->bond, link, &enslave_handler);
+ if (r < 0) {
+ log_struct_link(LOG_WARNING, link,
+ "MESSAGE=%*s: could not enslave by '%s': %s",
+ IFNAMSIZ,
+ link->ifname, link->network->bond->ifname, strerror(-r),
+ NETDEV(link->network->bond),
+ NULL);
+ link_enter_failed(link);
+ return r;
+ }
+
+ link_ref(link);
+ link->enslaving ++;
+ }
+
if (link->network->bridge) {
log_struct_link(LOG_DEBUG, link,
- "MESSAGE=%s: enslaving by '%s'",
- 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);
return r;
}
+ link_ref(link);
link->enslaving ++;
}
- if (link->network->bond) {
+ if (link->network->tunnel) {
log_struct_link(LOG_DEBUG, link,
- "MESSAGE=%s: enslaving by '%s'",
- link->ifname, link->network->bond->name,
- NETDEV(link->network->bond),
+ "MESSAGE=%*s: enslaving by '%s'",
+ IFNAMSIZ,
+ link->ifname, link->network->tunnel->ifname,
+ NETDEV(link->network->tunnel),
NULL);
- r = netdev_enslave(link->network->bond, link, &enslave_handler);
+ 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",
- link->ifname, link->network->bond->name, strerror(-r),
- NETDEV(link->network->bond),
+ "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;
}
+ link_ref(link);
link->enslaving ++;
}
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;
}
+ link_ref(link);
link->enslaving ++;
}
return 0;
}
-static int link_getlink_handler(sd_rtnl *rtnl, sd_rtnl_message *m,
- void *userdata) {
- Link *link = userdata;
+static int link_configure(Link *link) {
int r;
assert(link);
+ assert(link->state == LINK_STATE_INITIALIZING);
- if (link->state == LINK_STATE_FAILED)
- return 1;
+ if (link->network->ipv4ll) {
+ uint8_t seed[8];
- r = sd_rtnl_message_get_errno(m);
- if (r < 0) {
- log_struct_link(LOG_ERR, link,
- "MESSAGE=%s: could not get state: %s",
- link->ifname, strerror(-r),
- "ERRNO=%d", -r,
- NULL);
- link_enter_failed(link);
- return 1;
+ r = sd_ipv4ll_new(&link->ipv4ll);
+ if (r < 0)
+ return r;
+
+ if (link->udev_device) {
+ r = net_get_unique_predictable_data(link->udev_device, seed);
+ if (r >= 0) {
+ r = sd_ipv4ll_set_address_seed(link->ipv4ll, seed);
+ if (r < 0)
+ return r;
+ }
+ }
+
+ r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
+ if (r < 0)
+ return r;
+
+ r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
+ if (r < 0)
+ return r;
+
+ r = sd_ipv4ll_set_index(link->ipv4ll, link->ifindex);
+ if (r < 0)
+ return r;
+
+ r = sd_ipv4ll_set_callback(link->ipv4ll, ipv4ll_handler, link);
+ if (r < 0)
+ return r;
}
- log_debug_link(link, "got link state");
+ if (link->network->dhcp) {
+ r = sd_dhcp_client_new(&link->dhcp_client);
+ if (r < 0)
+ return r;
+
+ r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
+ if (r < 0)
+ return r;
- link_update(link, m);
+ r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac);
+ if (r < 0)
+ return r;
- return 1;
+ r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);
+ if (r < 0)
+ return r;
+
+ r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp_handler, link);
+ if (r < 0)
+ return r;
+
+ if (link->network->dhcp_mtu) {
+ r = sd_dhcp_client_set_request_option(link->dhcp_client, 26);
+ if (r < 0)
+ return r;
+ }
+ }
+
+ if (link->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)
+ return r;
+ }
+
+ return link_enter_enslave(link);
}
-static int link_getlink(Link *link) {
- _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
+int link_initialized(Link *link, struct udev_device *device) {
+ Network *network;
int r;
assert(link);
+ assert(link->ifname);
assert(link->manager);
- assert(link->manager->rtnl);
- log_debug_link(link, "requesting link status");
+ if (link->state != LINK_STATE_INITIALIZING)
+ return 0;
- r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
- RTM_GETLINK, link->ifindex);
- if (r < 0) {
- log_error_link(link, "Could not allocate RTM_GETLINK message");
+ if (device)
+ link->udev_device = udev_device_ref(device);
+
+ log_debug_link(link, "udev initialized link");
+
+ r = network_get(link->manager, device, link->ifname, &link->mac, &network);
+ if (r == -ENOENT) {
+ link_enter_unmanaged(link);
+ return 0;
+ } else if (r < 0)
+ return r;
+
+ r = network_apply(link->manager, network, link);
+ if (r < 0)
+ return r;
+
+ r = link_configure(link);
+ if (r < 0)
return r;
+
+ return 0;
+}
+
+int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
+ Manager *m = userdata;
+ Link *link = NULL;
+ uint16_t type;
+ _cleanup_address_free_ Address *address = NULL;
+ Address *ad;
+ char buf[INET6_ADDRSTRLEN];
+ bool address_dropped = false;
+ int r, ifindex;
+
+ assert(rtnl);
+ assert(message);
+ assert(m);
+
+ r = sd_rtnl_message_get_type(message, &type);
+ if (r < 0) {
+ log_warning("rtnl: could not get message type");
+ return 0;
+ }
+
+ r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
+ if (r < 0 || ifindex <= 0) {
+ log_warning("rtnl: received address message without valid ifindex, ignoring");
+ return 0;
+ } else {
+ r = link_get(m, ifindex, &link);
+ if (r < 0 || !link) {
+ log_warning("rtnl: received address for a nonexistent link, ignoring");
+ return 0;
+ }
}
- r = sd_rtnl_call_async(link->manager->rtnl, req, link_getlink_handler,
- link, 0, NULL);
+ 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_error_link(link,
- "Could not send rtnetlink message: %s", strerror(-r));
- return r;
+ log_warning_link(link, "rtnl: received address with invalid prefixlen, ignoring");
+ return 0;
}
- 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;
}
-int link_configure(Link *link) {
+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);
- assert(link->network);
- assert(link->state == _LINK_STATE_INVALID);
- r = link_getlink(link);
- if (r < 0) {
- link_enter_failed(link);
+ for (; m; m = sd_rtnl_message_next(m)) {
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0) {
+ log_debug_link(link, "getting address failed: %s", strerror(-r));
+ continue;
+ }
+
+ r = link_rtnl_process_address(rtnl, m, link->manager);
+ if (r < 0)
+ log_warning_link(link, "could not process address: %s", strerror(-r));
+ }
+
+ return 1;
+}
+
+int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
+ Link *link;
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
+ _cleanup_udev_device_unref_ struct udev_device *device = NULL;
+ char ifindex_str[2 + DECIMAL_STR_MAX(int)];
+ int r;
+
+ assert(m);
+ assert(m->rtnl);
+ assert(message);
+ assert(ret);
+
+ r = link_new(m, message, ret);
+ if (r < 0)
return r;
+
+ link = *ret;
+
+ log_debug_link(link, "link %"PRIu64" added", link->ifindex);
+
+ r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, link->ifindex, 0);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_call_async(m->rtnl, req, link_get_address_handler, link, 0, NULL);
+ if (r < 0)
+ return r;
+
+ if (detect_container(NULL) <= 0) {
+ /* not in a container, udev will be around */
+ sprintf(ifindex_str, "n%"PRIu64, link->ifindex);
+ device = udev_device_new_from_device_id(m->udev, ifindex_str);
+ if (!device) {
+ log_warning_link(link, "could not find udev device");
+ return -errno;
+ }
+
+ if (udev_device_get_is_initialized(device) <= 0) {
+ /* not yet ready */
+ log_debug_link(link, "udev initializing link...");
+ return 0;
+ }
}
- return link_enter_enslave(link);
+ r = link_initialized(link, device);
+ if (r < 0)
+ return r;
+
+ return 0;
}
int link_update(Link *link, sd_rtnl_message *m) {
- unsigned flags;
+ struct ether_addr mac;
+ char *ifname;
int r;
assert(link);
+ assert(link->ifname);
assert(m);
- if (link->state == LINK_STATE_FAILED)
- return 0;
+ if (link->state == LINK_STATE_LINGER) {
+ link_ref(link);
+ log_info_link(link, "link readded");
+ link->state = LINK_STATE_ENSLAVING;
+ }
- 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_string(m, IFLA_IFNAME, &ifname);
+ if (r >= 0 && !streq(ifname, link->ifname)) {
+ log_info_link(link, "renamed to %s", ifname);
+
+ free(link->ifname);
+ link->ifname = strdup(ifname);
+ if (!link->ifname)
+ return -ENOMEM;
}
- if (link->network->dhcp && link->network->dhcp_mtu &&
- !link->original_mtu) {
+ if (!link->original_mtu) {
r = sd_rtnl_message_read_u16(m, IFLA_MTU, &link->original_mtu);
if (r >= 0)
log_debug_link(link, "saved original MTU: %"
PRIu16, link->original_mtu);
}
- r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &link->mac);
+ /* 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) {
- log_debug_link(link, "MAC address: "
- "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
- link->mac.ether_addr_octet[0],
- link->mac.ether_addr_octet[1],
- link->mac.ether_addr_octet[2],
- link->mac.ether_addr_octet[3],
- link->mac.ether_addr_octet[4],
- link->mac.ether_addr_octet[5]);
+ if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN)) {
+
+ memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
+
+ log_debug_link(link, "MAC address: "
+ "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
+ mac.ether_addr_octet[0],
+ mac.ether_addr_octet[1],
+ mac.ether_addr_octet[2],
+ mac.ether_addr_octet[3],
+ mac.ether_addr_octet[4],
+ mac.ether_addr_octet[5]);
+
+ if (link->ipv4ll) {
+ r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
+ if (r < 0) {
+ log_warning_link(link, "Could not update MAC "
+ "address in IPv4LL client: %s",
+ strerror(-r));
+ return r;
+ }
+ }
+
+ if (link->dhcp_client) {
+ r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac);
+ if (r < 0) {
+ log_warning_link(link, "Could not update MAC "
+ "address in DHCP client: %s",
+ strerror(-r));
+ return r;
+ }
+ }
+ }
}
- return link_update_flags(link, flags);
+ return link_update_flags(link, m);
+}
+
+static void serialize_addresses(FILE *f, const char *key, Address *address) {
+ Address *ad;
+
+ assert(f);
+ assert(key);
+
+ if (!address)
+ return;
+
+ fprintf(f, "%s=", key);
+
+ LIST_FOREACH(addresses, ad, address) {
+ char buf[INET6_ADDRSTRLEN];
+
+ if (inet_ntop(ad->family, &ad->in_addr, buf, INET6_ADDRSTRLEN))
+ fprintf(f, "%s%s", buf, (ad->addresses_next) ? " ": "");
+ }
+
+ fputs("\n", f);
+}
+
+static void link_update_operstate(Link *link) {
+
+ assert(link);
+
+ if (link->kernel_operstate == IF_OPER_DORMANT)
+ link->operstate = LINK_OPERSTATE_DORMANT;
+ else if (link_has_carrier(link->flags, link->kernel_operstate)) {
+ Address *address;
+ uint8_t scope = RT_SCOPE_NOWHERE;
+
+ /* if we have carrier, check what addresses we have */
+ LIST_FOREACH(addresses, address, link->addresses) {
+ if (address->scope < scope)
+ scope = address->scope;
+ }
+
+ if (scope < RT_SCOPE_SITE)
+ /* universally accessible addresses found */
+ link->operstate = LINK_OPERSTATE_ROUTABLE;
+ else if (scope < RT_SCOPE_HOST)
+ /* only link or site local addresses found */
+ link->operstate = LINK_OPERSTATE_DEGRADED;
+ else
+ /* no useful addresses found */
+ link->operstate = LINK_OPERSTATE_CARRIER;
+ } else
+ link->operstate = LINK_OPERSTATE_UNKNOWN;
}
int link_save(Link *link) {
_cleanup_free_ char *temp_path = NULL;
_cleanup_fclose_ FILE *f = NULL;
+ const char *admin_state, *oper_state;
int r;
assert(link);
assert(link->state_file);
+ assert(link->lease_file);
+ assert(link->manager);
+
+ link_update_operstate(link);
- r = mkdir_safe_label("/run/systemd/network/links", 0755, 0, 0);
+ r = manager_save(link->manager);
if (r < 0)
- goto finish;
+ return r;
+
+ if (link->state == LINK_STATE_LINGER) {
+ unlink(link->state_file);
+ return 0;
+ }
+
+ admin_state = link_state_to_string(link->state);
+ assert(admin_state);
+
+ oper_state = link_operstate_to_string(link->operstate);
+ assert(oper_state);
r = fopen_temporary(link->state_file, &f, &temp_path);
if (r < 0)
fprintf(f,
"# This is private data. Do not parse.\n"
- "STATE=%s\n",
- link_state_to_string(link->state));
+ "ADMIN_STATE=%s\n"
+ "OPER_STATE=%s\n"
+ "FLAGS=%u\n",
+ admin_state, oper_state, link->flags);
+
+ if (link->network) {
+ serialize_addresses(f, "DNS", link->network->dns);
+ serialize_addresses(f, "NTP", link->network->ntp);
+ }
if (link->dhcp_lease) {
- const char *lease_file = "/run/systemd/network/leases/test.lease";
-
- r = dhcp_lease_save(link->dhcp_lease, lease_file);
+ r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
if (r < 0)
goto finish;
- fprintf(f, "DHCP_LEASE=%s\n", 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);
fflush(f);
finish:
if (r < 0)
- log_error("Failed to save link data %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;
}
static const char* const link_state_table[_LINK_STATE_MAX] = {
+ [LINK_STATE_INITIALIZING] = "initializing",
[LINK_STATE_ENSLAVING] = "configuring",
[LINK_STATE_SETTING_ADDRESSES] = "configuring",
[LINK_STATE_SETTING_ROUTES] = "configuring",
[LINK_STATE_CONFIGURED] = "configured",
+ [LINK_STATE_UNMANAGED] = "unmanaged",
[LINK_STATE_FAILED] = "failed",
+ [LINK_STATE_LINGER] = "linger",
};
DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
+
+static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
+ [LINK_OPERSTATE_UNKNOWN] = "unknown",
+ [LINK_OPERSTATE_DORMANT] = "dormant",
+ [LINK_OPERSTATE_CARRIER] = "carrier",
+ [LINK_OPERSTATE_DEGRADED] = "degraded",
+ [LINK_OPERSTATE_ROUTABLE] = "routable",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
~ianmdlvl / elogind.git / blobdiff