#include <netinet/ether.h>
#include <linux/if.h>
+#include <unistd.h>
-#include "networkd.h"
+#include "networkd-link.h"
+#include "networkd-netdev.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 "conf-parser.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;
+static bool link_dhcp6_enabled(Link *link) {
+ if (link->flags & IFF_LOOPBACK)
+ return false;
+
+ if (!link->network)
+ return false;
+
+ return IN_SET(link->network->dhcp, DHCP_SUPPORT_V6, DHCP_SUPPORT_BOTH);
+}
+
+static bool link_dhcp4_enabled(Link *link) {
+ if (link->flags & IFF_LOOPBACK)
+ return false;
+
+ if (!link->network)
+ return false;
+
+ return IN_SET(link->network->dhcp, DHCP_SUPPORT_V4, DHCP_SUPPORT_BOTH);
+}
+
+static bool link_dhcp4_server_enabled(Link *link) {
+ if (link->flags & IFF_LOOPBACK)
+ return false;
+
+ if (!link->network)
+ return false;
+
+ return link->network->dhcp_server;
+}
+
+static bool link_ipv4ll_enabled(Link *link) {
+ if (link->flags & IFF_LOOPBACK)
+ return false;
+
+ if (!link->network)
+ return false;
+
+ return link->network->ipv4ll;
+}
+
+#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;
+ uint16_t type;
+ const 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->state = LINK_STATE_PENDING;
+ link->ifindex = ifindex;
+ link->ifname = strdup(ifname);
+ if (!link->ifname)
+ return -ENOMEM;
- link->ifindex = udev_device_get_ifindex(device);
- if (link->ifindex <= 0)
- return -EINVAL;
+ r = sd_rtnl_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
+ if (r < 0)
+ log_debug_link(link, "MAC address not found for new device, continuing without");
- r = asprintf(&link->state_file, "/run/systemd/network/links/%u",
- (unsigned) link->ifindex);
+ r = asprintf(&link->state_file, "/run/systemd/netif/links/%d",
+ link->ifindex);
if (r < 0)
- return r;
+ return -ENOMEM;
- 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->lease_file, "/run/systemd/netif/leases/%d",
+ link->ifindex);
+ if (r < 0)
+ return -ENOMEM;
- ifname = udev_device_get_sysname(device);
- link->ifname = strdup(ifname);
+ r = hashmap_ensure_allocated(&manager->links, NULL);
+ if (r < 0)
+ return r;
+
+ r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
+ if (r < 0)
+ return r;
- r = hashmap_put(manager->links, &link->ifindex, link);
+ r = link_update_flags(link, message);
if (r < 0)
return r;
return 0;
}
-void link_free(Link *link) {
+static void link_free(Link *link) {
+ Address *address;
+
if (!link)
return;
- assert(link->manager);
+ while ((address = link->addresses)) {
+ LIST_REMOVE(addresses, link->addresses, address);
+ address_free(address);
+ }
- sd_dhcp_client_free(link->dhcp_client);
+ while ((address = link->pool_addresses)) {
+ LIST_REMOVE(addresses, link->pool_addresses, address);
+ address_free(address);
+ }
+
+ sd_dhcp_client_unref(link->dhcp_client);
sd_dhcp_lease_unref(link->dhcp_lease);
- hashmap_remove(link->manager->links, &link->ifindex);
+ unlink(link->lease_file);
+ free(link->lease_file);
+
+ sd_ipv4ll_unref(link->ipv4ll);
+ sd_dhcp6_client_unref(link->dhcp6_client);
+ sd_icmp6_nd_unref(link->icmp6_router_discovery);
+
+ if (link->manager)
+ hashmap_remove(link->manager->links, INT_TO_PTR(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;
assert(m);
- assert(m->links);
assert(ifindex);
assert(ret);
- ifindex_64 = ifindex;
- link = hashmap_get(m->links, &ifindex_64);
+ link = hashmap_get(m->links, INT_TO_PTR(ifindex));
if (!link)
return -ENODEV;
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_stop_clients(Link *link) {
+ int r = 0, k;
+
+ assert(link);
+ assert(link->manager);
+ assert(link->manager->event);
+
+ if (!link->network)
+ return 0;
+
+ 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));
+ r = k;
+ }
+ }
+
+ 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));
+ r = k;
+ }
+ }
+
+ 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));
+ 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));
+ r = k;
+ }
+ }
+
+ return r;
+}
+
+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 Address* link_find_dhcp_server_address(Link *link) {
+ Address *address;
+
+ assert(link);
+ assert(link->network);
+
+ /* The the first statically configured address if there is any */
+ LIST_FOREACH(addresses, address, link->network->static_addresses) {
+
+ if (address->family != AF_INET)
+ continue;
+
+ if (in_addr_is_null(address->family, &address->in_addr))
+ continue;
+
+ return address;
+ }
+
+ /* If that didn't work, find a suitable address we got from the pool */
+ LIST_FOREACH(addresses, address, link->pool_addresses) {
+ if (address->family != AF_INET)
+ continue;
+
+ return address;
+ }
+
+ return NULL;
}
static int link_enter_configured(Link *link) {
+ int r;
+
assert(link);
+ assert(link->network);
assert(link->state == LINK_STATE_SETTING_ROUTES);
+ if (link_dhcp4_server_enabled(link) &&
+ !sd_dhcp_server_is_running(link->dhcp_server)) {
+ struct in_addr pool_start;
+ Address *address;
+
+ address = link_find_dhcp_server_address(link);
+ if (!address) {
+ 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,
+ address->prefixlen);
+ 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);
+ if (r < 0)
+ return r;
+
+ /* TODO:
+ r = sd_dhcp_server_set_router(link->dhcp_server,
+ &main_address->in_addr.in);
+ if (r < 0)
+ return r;
+
+ r = sd_dhcp_server_set_prefixlen(link->dhcp_server,
+ main_address->prefixlen);
+ if (r < 0)
+ return r;
+ */
+
+ 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;
return 0;
}
-static void link_enter_failed(Link *link) {
+void link_client_handler(Link *link) {
assert(link);
+ assert(link->network);
- log_warning_link(link, "failed");
+ if (!link->static_configured)
+ return;
- link->state = LINK_STATE_FAILED;
+ if (link_ipv4ll_enabled(link))
+ if (!link->ipv4ll_address ||
+ !link->ipv4ll_route)
+ return;
- link_save(link);
+ if (link_dhcp4_enabled(link) && !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) {
- Link *link = userdata;
+ _cleanup_link_unref_ Link *link = 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(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 (link->state == LINK_STATE_FAILED)
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
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);
- /* 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;
link->state = LINK_STATE_SETTING_ROUTES;
- if (!link->network->static_routes && !link->dhcp_lease)
- 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,
- "could not set routes: %s", strerror(-r));
+ "could not set routes: %s",
+ strerror(-r));
link_enter_failed(link);
return r;
}
- link->route_messages ++;
+ link->link_messages ++;
}
- if (link->dhcp_lease) {
- _cleanup_route_free_ Route *route = NULL;
- struct in_addr gateway;
+ if (link->link_messages == 0) {
+ link->static_configured = true;
+ link_client_handler(link);
+ } else
+ log_debug_link(link, "setting routes");
- r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
- if (r < 0) {
- log_warning_link(link, "DHCP error: no router: %s",
- strerror(-r));
- return r;
- }
+ return 0;
+}
- r = route_new_dynamic(&route);
- if (r < 0) {
- log_error_link(link, "Could not allocate route: %s",
- strerror(-r));
- return r;
- }
+int link_route_drop_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 != -ESRCH)
+ log_struct_link(LOG_WARNING, link,
+ "MESSAGE=%-*s: could not drop route: %s",
+ IFNAMSIZ,
+ link->ifname, strerror(-r),
+ "ERRNO=%d", -r,
+ NULL);
+
+ return 1;
+}
+
+int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ _cleanup_link_unref_ Link *link = userdata;
+ int r;
- route->family = AF_INET;
- route->in_addr.in = gateway;
+ assert(rtnl);
+ assert(m);
+ assert(link);
+ assert(link->manager);
- r = route_configure(route, link, &route_handler);
+ for (; m; m = sd_rtnl_message_next(m)) {
+ r = sd_rtnl_message_get_errno(m);
if (r < 0) {
- log_warning_link(link,
- "could not set routes: %s", strerror(-r));
- link_enter_failed(link);
- return r;
+ log_debug_link(link, "getting address failed: %s",
+ strerror(-r));
+ continue;
}
- link->route_messages ++;
+ r = link_rtnl_process_address(rtnl, m, link->manager);
+ if (r < 0)
+ log_warning_link(link, "could not process address: %s",
+ strerror(-r));
}
- return 0;
+ return 1;
}
static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- Link *link = userdata;
+ _cleanup_link_unref_ Link *link = userdata;
int r;
+ assert(rtnl);
assert(m);
assert(link);
assert(link->ifname);
- assert(link->addr_messages > 0);
- assert(link->state == LINK_STATE_SETTING_ADDRESSES || link->state == LINK_STATE_FAILED);
+ 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 (link->state == LINK_STATE_FAILED)
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
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);
+ else if (r >= 0) {
+ /* calling handler directly so take a ref */
+ link_ref(link);
+ 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);
}
link->state = LINK_STATE_SETTING_ADDRESSES;
- if (!link->network->static_addresses && !link->dhcp_lease)
- 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,
- "could not set addresses: %s", strerror(-r));
+ "could not set addresses: %s",
+ strerror(-r));
link_enter_failed(link);
return r;
}
- link->addr_messages ++;
+ link->link_messages ++;
}
- if (link->dhcp_lease) {
- _cleanup_address_free_ Address *address = NULL;
- struct in_addr addr;
- struct in_addr netmask;
- unsigned prefixlen;
+ if (link->link_messages == 0) {
+ link_enter_set_routes(link);
+ } else
+ log_debug_link(link, "setting addresses");
- 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;
- }
+ return 0;
+}
- r = sd_dhcp_lease_get_netmask(link->dhcp_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 = 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 = prefixlen;
- address->broadcast.s_addr = addr.s_addr | ~netmask.s_addr;
-
- r = address_configure(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 ++;
- }
-
- return 0;
-}
-
-static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- Link *link = userdata;
- int r;
+int link_address_drop_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 (link->state == LINK_STATE_FAILED)
+ 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)
+ if (r < 0 && r != -EADDRNOTAVAIL)
log_struct_link(LOG_WARNING, link,
- "MESSAGE=%s: could not drop address: %s",
+ "MESSAGE=%-*s: could not drop address: %s",
+ IFNAMSIZ,
link->ifname, strerror(-r),
"ERRNO=%d", -r,
NULL);
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;
+ assert(link);
+
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+ return 1;
+
r = sd_bus_message_get_errno(m);
- if (r < 0)
- log_warning("Could not set hostname: %s", strerror(-r));
+ if (r > 0)
+ log_warning_link(link, "Could not set hostname: %s",
+ strerror(r));
return 1;
}
-static int set_hostname(sd_bus *bus, const char *hostname) {
+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);
- if (r < 0)
- log_error("Could not set transient hostname: %s", strerror(-r));
+ 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));
+ return r;
+ }
- return r;
+ link_ref(link);
+
+ return 0;
}
static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- Link *link = userdata;
+ _cleanup_link_unref_ Link *link = userdata;
int r;
assert(m);
assert(link);
assert(link->ifname);
- if (link->state == LINK_STATE_FAILED)
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return 1;
r = sd_rtnl_message_get_errno(m);
if (r < 0)
log_struct_link(LOG_WARNING, link,
- "MESSAGE=%s: could not set MTU: %s",
- link->ifname, strerror(-r),
+ "MESSAGE=%-*s: could not set MTU: %s",
+ IFNAMSIZ, link->ifname, strerror(-r),
"ERRNO=%d", -r,
NULL);
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;
return r;
}
- r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
+ 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));
+ "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;
- unsigned prefixlen;
- int r;
+static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
+ Link *link = userdata;
assert(link);
- assert(link->dhcp_lease);
-
- log_warning_link(link, "DHCP lease lost");
-
- r = address_new_dynamic(&address);
- if (r >= 0) {
- 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;
- }
- }
- }
+ assert(link->network);
+ assert(link->manager);
- if (link->network->dhcp_hostname) {
- const char *hostname = NULL;
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+ return;
- r = sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname);
- if (r >= 0 && hostname) {
- r = set_hostname(link->manager->bus, "");
- if (r < 0)
- log_error("Failed to reset transient hostname");
- }
+ switch(event) {
+ case DHCP6_EVENT_STOP:
+ case DHCP6_EVENT_RESEND_EXPIRE:
+ case DHCP6_EVENT_RETRANS_MAX:
+ case DHCP6_EVENT_IP_ACQUIRE:
+ log_debug_link(link, "DHCPv6 event %d", event);
+
+ break;
+
+ default:
+ if (event < 0)
+ log_warning_link(link, "DHCPv6 error: %s",
+ strerror(-event));
+ else
+ log_warning_link(link, "DHCPv6 unknown event: %d",
+ event);
+ return;
}
-
- link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
-
- 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;
- struct in_addr *nameservers;
- size_t nameservers_size;
+static void icmp6_router_handler(sd_icmp6_nd *nd, int event, void *userdata) {
+ Link *link = userdata;
int r;
- assert(client);
assert(link);
+ assert(link->network);
+ assert(link->manager);
- r = sd_dhcp_client_get_lease(client, &lease);
- if (r < 0) {
- log_warning_link(link, "DHCP error: no lease: %s",
- strerror(-r));
- return r;
- }
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+ return;
- r = sd_dhcp_lease_get_address(lease, &address);
- if (r < 0) {
- log_warning_link(link, "DHCP error: no address: %s",
- strerror(-r));
- return r;
- }
+ switch(event) {
+ case ICMP6_EVENT_ROUTER_ADVERTISMENT_NONE:
+ case ICMP6_EVENT_ROUTER_ADVERTISMENT_OTHER:
+ return;
- r = sd_dhcp_lease_get_netmask(lease, &netmask);
- if (r < 0) {
- log_warning_link(link, "DHCP error: no netmask: %s",
- strerror(-r));
- return r;
- }
+ case ICMP6_EVENT_ROUTER_ADVERTISMENT_TIMEOUT:
+ case ICMP6_EVENT_ROUTER_ADVERTISMENT_MANAGED:
+ break;
- prefixlen = net_netmask_to_prefixlen(&netmask);
+ default:
+ if (event < 0)
+ log_warning_link(link, "ICMPv6 error: %s",
+ strerror(-event));
+ else
+ log_warning_link(link, "ICMPv6 unknown event: %d",
+ event);
- r = sd_dhcp_lease_get_router(lease, &gateway);
- if (r < 0) {
- log_warning_link(link, "DHCP error: no router: %s",
- strerror(-r));
- return r;
+ return;
}
- 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);
-
- 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->dhcp6_client)
+ return;
- if (link->network->dhcp_mtu) {
- uint16_t mtu;
+ r = sd_dhcp6_client_new(&link->dhcp6_client);
+ if (r < 0)
+ return;
- 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);
- }
+ r = sd_dhcp6_client_attach_event(link->dhcp6_client, NULL, 0);
+ if (r < 0) {
+ link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
+ return;
}
- if (link->network->dhcp_hostname) {
- const char *hostname;
-
- r = sd_dhcp_lease_get_hostname(lease, &hostname);
- if (r >= 0) {
- r = set_hostname(link->manager->bus, hostname);
- if (r < 0)
- log_error("Failed to set transient hostname "
- "to '%s'", hostname);
- }
+ r = sd_dhcp6_client_set_mac(link->dhcp6_client,
+ (const uint8_t *) &link->mac,
+ sizeof (link->mac), ARPHRD_ETHER);
+ if (r < 0) {
+ link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
+ return;
}
- link_enter_set_addresses(link);
-
- return 0;
-}
-
-static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
- Link *link = userdata;
- int r;
-
- assert(link);
- assert(link->network);
- assert(link->manager);
-
- if (link->state == LINK_STATE_FAILED)
+ r = sd_dhcp6_client_set_index(link->dhcp6_client, link->ifindex);
+ if (r < 0) {
+ link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
return;
+ }
- switch (event) {
- case DHCP_EVENT_NO_LEASE:
- log_debug_link(link, "IP address in use.");
- break;
- 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;
- }
- }
-
- break;
- case DHCP_EVENT_IP_ACQUIRE:
- r = dhcp_lease_acquired(client, link);
- if (r < 0) {
- link_enter_failed(link);
- return;
- }
- break;
- default:
- if (event < 0)
- log_warning_link(link, "DHCP error: %s", strerror(-event));
- else
- log_warning_link(link, "DHCP unknown event: %d", event);
- break;
+ r = sd_dhcp6_client_set_callback(link->dhcp6_client, dhcp6_handler,
+ link);
+ if (r < 0) {
+ link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
+ return;
}
- return;
+ r = sd_dhcp6_client_start(link->dhcp6_client);
+ if (r < 0)
+ link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
}
static int link_acquire_conf(Link *link) {
assert(link);
assert(link->network);
- assert(link->network->dhcp);
assert(link->manager);
assert(link->manager->event);
- 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;
+ if (link_ipv4ll_enabled(link)) {
+ assert(link->ipv4ll);
- r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac);
- if (r < 0)
- return r;
+ log_debug_link(link, "acquiring IPv4 link-local address");
- r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp_handler, link);
- if (r < 0)
+ r = sd_ipv4ll_start(link->ipv4ll);
+ if (r < 0) {
+ log_warning_link(link, "could not acquire IPv4 "
+ "link-local address");
return r;
-
- if (link->network->dhcp_mtu) {
- r = sd_dhcp_client_set_request_option(link->dhcp_client, 26);
- if (r < 0)
- return r;
}
}
- log_debug_link(link, "acquiring DHCPv4 lease");
-
- r = sd_dhcp_client_start(link->dhcp_client);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-static int link_update_flags(Link *link, unsigned flags) {
- int r;
-
- assert(link);
- assert(link->network);
+ if (link_dhcp4_enabled(link)) {
+ assert(link->dhcp_client);
- if (link->state == LINK_STATE_FAILED)
- return 0;
+ log_debug_link(link, "acquiring DHCPv4 lease");
- if (link->flags == flags) {
- log_debug_link(link, "link status unchanged: %#.8x", flags);
- return 0;
+ r = sd_dhcp_client_start(link->dhcp_client);
+ if (r < 0) {
+ log_warning_link(link, "could not acquire DHCPv4 "
+ "lease");
+ return r;
+ }
}
- if ((link->flags & IFF_UP) != (flags & IFF_UP))
- log_info_link(link,
- "link is %s", flags & IFF_UP ? "up": "down");
+ if (link_dhcp6_enabled(link)) {
+ assert(link->icmp6_router_discovery);
- if ((link->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) {
- if (flags & IFF_LOWER_UP) {
- log_info_link(link, "carrier on");
+ log_debug_link(link, "discovering IPv6 routers");
- if (link->network->dhcp) {
- r = link_acquire_conf(link);
- if (r < 0) {
- log_warning_link(link, "Could not acquire DHCPv4 lease: %s", strerror(-r));
- link_enter_failed(link);
- return r;
- }
- }
- } else {
- log_info_link(link, "carrier off");
-
- 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;
- }
- }
+ r = sd_icmp6_router_solicitation_start(link->icmp6_router_discovery);
+ if (r < 0) {
+ log_warning_link(link,
+ "could not start IPv6 router discovery");
+ return r;
}
}
- log_debug_link(link,
- "link status updated: %#.8x -> %#.8x", link->flags, flags);
+ return 0;
+}
- link->flags = flags;
+bool link_has_carrier(Link *link) {
+ /* see Documentation/networking/operstates.txt in the kernel sources */
- return 0;
+ if (link->kernel_operstate == IF_OPER_UP)
+ return true;
+
+ if (link->kernel_operstate == IF_OPER_UNKNOWN)
+ /* operstate may not be implemented, so fall back to flags */
+ if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
+ return true;
+
+ return false;
}
static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- Link *link = userdata;
+ _cleanup_link_unref_ Link *link = userdata;
int r;
assert(link);
- if (link->state == LINK_STATE_FAILED)
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return 1;
r = sd_rtnl_message_get_errno(m);
if (r < 0) {
- log_struct_link(LOG_ERR, link,
- "MESSAGE=%s: could not bring up interface: %s",
+ /* 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",
+ IFNAMSIZ,
link->ifname, strerror(-r),
"ERRNO=%d", -r,
NULL);
- link_enter_failed(link);
- return 1;
}
- link_update_flags(link, link->flags | IFF_UP);
-
return 1;
}
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;
}
+ link_ref(link);
+
return 0;
}
-static int link_enslaved(Link *link) {
+static int link_joined(Link *link) {
int r;
assert(link);
- 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)
- return link_enter_set_addresses(link);
-
- return 0;
+ return link_enter_set_addresses(link);
}
-static int enslave_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- Link *link = 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(link->state == LINK_STATE_ENSLAVING || link->state == LINK_STATE_FAILED);
assert(link->network);
link->enslaving --;
- if (link->state == LINK_STATE_FAILED)
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return 1;
r = sd_rtnl_message_get_errno(m);
- if (r < 0) {
+ if (r < 0 && r != -EEXIST) {
log_struct_link(LOG_ERR, link,
- "MESSAGE=%s: could not enslave: %s",
+ "MESSAGE=%-*s: could not join netdev: %s",
+ IFNAMSIZ,
link->ifname, strerror(-r),
"ERRNO=%d", -r,
NULL);
link_enter_failed(link);
return 1;
- }
-
- log_debug_link(link, "enslaved");
+ } else
+ log_debug_link(link, "joined netdev");
- if (link->enslaving == 0)
- link_enslaved(link);
+ if (link->enslaving <= 0)
+ link_joined(link);
return 1;
}
-static int link_enter_enslave(Link *link) {
- NetDev *vlan, *macvlan;
+static int link_enter_join_netdev(Link *link) {
+ NetDev *netdev;
Iterator i;
int r;
assert(link);
assert(link->network);
- assert(link->state == _LINK_STATE_INVALID);
+ assert(link->state == LINK_STATE_PENDING);
link->state = LINK_STATE_ENSLAVING;
link_save(link);
- if (!link->network->bridge && !link->network->bond &&
- hashmap_isempty(link->network->vlans) &&
- hashmap_isempty(link->network->macvlans))
- return link_enslaved(link);
+ if (!link->network->bridge &&
+ !link->network->bond &&
+ hashmap_isempty(link->network->stacked_netdevs))
+ return link_joined(link);
- if (link->network->bridge) {
+ if (link->network->bond) {
log_struct_link(LOG_DEBUG, link,
- "MESSAGE=%s: enslaving by '%s'",
- link->ifname, link->network->bridge->name,
- NETDEV(link->network->bridge),
+ "MESSAGE=%-*s: enslaving by '%s'",
+ IFNAMSIZ,
+ link->ifname, link->network->bond->ifname,
+ NETDEVIF(link->network->bond),
NULL);
- r = netdev_enslave(link->network->bridge, link, &enslave_handler);
+ r = netdev_join(link->network->bond, link, &netdev_join_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),
- NETDEV(link->network->bridge),
+ "MESSAGE=%-*s: could not join netdev '%s': %s",
+ IFNAMSIZ,
+ link->ifname, link->network->bond->ifname,
+ strerror(-r),
+ NETDEVIF(link->network->bond),
NULL);
link_enter_failed(link);
return r;
link->enslaving ++;
}
- HASHMAP_FOREACH(vlan, link->network->vlans, i) {
+ if (link->network->bridge) {
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, link->network->bridge->ifname,
+ NETDEVIF(link->network->bridge),
+ NULL);
- r = netdev_enslave(vlan, link, &enslave_handler);
+ r = netdev_join(link->network->bridge, link,
+ &netdev_join_handler);
if (r < 0) {
log_struct_link(LOG_WARNING, link,
- "MESSAGE=%s: could not enslave by '%s': %s",
- link->ifname, vlan->name, strerror(-r),
- NETDEV(vlan), NULL);
+ "MESSAGE=%-*s: could not join netdev '%s': %s",
+ IFNAMSIZ,
+ link->ifname, link->network->bridge->ifname,
+ strerror(-r),
+ NETDEVIF(link->network->bridge),
+ NULL);
link_enter_failed(link);
return r;
}
link->enslaving ++;
}
- HASHMAP_FOREACH(macvlan, link->network->macvlans, i) {
+ HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, 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, netdev->ifname, NETDEVIF(netdev),
+ NULL);
- r = netdev_enslave(macvlan, link, &enslave_handler);
+ r = netdev_join(netdev, link, &netdev_join_handler);
if (r < 0) {
log_struct_link(LOG_WARNING, link,
- "MESSAGE=%s: could not enslave by '%s': %s",
- link->ifname, macvlan->name, strerror(-r),
- NETDEV(macvlan), NULL);
+ "MESSAGE=%-*s: could not join netdev '%s': %s",
+ IFNAMSIZ,
+ link->ifname, netdev->ifname,
+ strerror(-r),
+ NETDEVIF(netdev), NULL);
link_enter_failed(link);
return r;
}
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->network);
+ assert(link->state == LINK_STATE_PENDING);
+
+ if (link_ipv4ll_enabled(link)) {
+ r = ipv4ll_configure(link);
+ if (r < 0)
+ return r;
+ }
+
+ if (link_dhcp4_enabled(link)) {
+ r = dhcp4_configure(link);
+ if (r < 0)
+ return r;
+ }
+
+ if (link_dhcp4_server_enabled(link)) {
+ r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
+ if (r < 0)
+ return r;
+
+ r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
+ if (r < 0)
+ return r;
+ }
+
+ if (link_dhcp6_enabled(link)) {
+ r = sd_icmp6_nd_new(&link->icmp6_router_discovery);
+ if (r < 0)
+ return r;
+
+ r = sd_icmp6_nd_attach_event(link->icmp6_router_discovery,
+ NULL, 0);
+ if (r < 0)
+ return r;
+
+ r = sd_icmp6_nd_set_mac(link->icmp6_router_discovery,
+ &link->mac);
+ if (r < 0)
+ return r;
+
+ r = sd_icmp6_nd_set_index(link->icmp6_router_discovery,
+ link->ifindex);
+ if (r < 0)
+ return r;
+
+ r = sd_icmp6_nd_set_callback(link->icmp6_router_discovery,
+ icmp6_router_handler, link);
+ if (r < 0)
+ return r;
+ }
+
+ if (link_has_carrier(link)) {
+ r = link_acquire_conf(link);
+ if (r < 0)
+ return r;
+ }
+
+ return link_enter_join_netdev(link);
+}
+
+static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m,
+ void *userdata) {
+ _cleanup_link_unref_ Link *link = userdata;
+ Network *network;
int r;
assert(link);
+ assert(link->ifname);
+ assert(link->manager);
- if (link->state == LINK_STATE_FAILED)
+ if (link->state != LINK_STATE_PENDING)
return 1;
- 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);
+ log_debug_link(link, "link state is up-to-date");
+
+ r = network_get(link->manager, link->udev_device, link->ifname,
+ &link->mac, &network);
+ if (r == -ENOENT) {
+ link_enter_unmanaged(link);
return 1;
+ } else if (r < 0)
+ return r;
+
+ if (link->flags & IFF_LOOPBACK) {
+ if (network->ipv4ll)
+ log_debug_link(link, "ignoring IPv4LL for loopback link");
+
+ if (network->dhcp != DHCP_SUPPORT_NONE)
+ log_debug_link(link, "ignoring DHCP clients for loopback link");
+
+ if (network->dhcp_server)
+ log_debug_link(link, "ignoring DHCP server for loopback link");
}
- log_debug_link(link, "got link state");
+ r = network_apply(link->manager, network, link);
+ if (r < 0)
+ return r;
- link_update(link, m);
+ r = link_configure(link);
+ if (r < 0)
+ return r;
return 1;
}
-static int link_getlink(Link *link) {
+int link_initialized(Link *link, struct udev_device *device) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
int r;
assert(link);
assert(link->manager);
assert(link->manager->rtnl);
+ assert(device);
- log_debug_link(link, "requesting link status");
+ if (link->state != LINK_STATE_PENDING)
+ return 0;
- r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
- RTM_GETLINK, link->ifindex);
+ if (link->udev_device)
+ return 0;
+
+ log_debug_link(link, "udev initialized link");
+
+ link->udev_device = udev_device_ref(device);
+
+ /* udev has initialized the link, but we don't know if we have yet
+ * processed the NEWLINK messages with the latest state. Do a GETLINK,
+ * when it returns we know that the pending NEWLINKs have already been
+ * processed and that we are up-to-date */
+
+ r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
+ link->ifindex);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_call_async(link->manager->rtnl, req,
+ link_initialized_and_synced, link, 0, NULL);
+ if (r < 0)
+ return r;
+
+ link_ref(link);
+
+ 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];
+ char valid_buf[FORMAT_TIMESPAN_MAX];
+ const char *valid_str = NULL;
+ 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_error_link(link, "Could not allocate RTM_GETLINK message");
+ 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 (%d), ignoring", ifindex);
+ return 0;
+ }
+ }
+
+ r = address_new_dynamic(&address);
+ if (r < 0)
return r;
+
+ 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_call_async(link->manager->rtnl, req, link_getlink_handler,
- link, 0, NULL);
+ 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;
+ }
+
+ 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);
+ 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;
+ }
+
+ 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);
+
+ address_free(ad);
+
+ address_dropped = true;
+
+ break;
+ }
+ }
+
+ switch (type) {
+ case RTM_NEWADDR:
+ if (!address_dropped)
+ log_debug_link(link, "added address: %s/%u (valid for %s)",
+ buf, address->prefixlen, valid_str);
+ else
+ log_debug_link(link, "updated address: %s/%u (valid for %s)",
+ buf, address->prefixlen, valid_str);
+
+ 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 (valid for %s)",
+ buf, address->prefixlen, valid_str);
+
+ link_save(link);
+ } else
+ log_warning_link(link,
+ "removing non-existent address: %s/%u (valid for %s)",
+ buf, address->prefixlen, valid_str);
+
+ break;
+ default:
+ assert_not_reached("Received invalid RTNL message type");
+ }
+
+ return 1;
}
-int link_configure(Link *link) {
+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(link);
- assert(link->network);
- assert(link->state == _LINK_STATE_INVALID);
+ assert(m);
+ assert(m->rtnl);
+ assert(message);
+ assert(ret);
- r = link_getlink(link);
- if (r < 0) {
- link_enter_failed(link);
+ r = link_new(m, message, ret);
+ if (r < 0)
+ return r;
+
+ 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);
+ 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;
+
+ link_ref(link);
+
+ if (detect_container(NULL) <= 0) {
+ /* not in a container, udev will be around */
+ sprintf(ifindex_str, "n%d", link->ifindex);
+ device = udev_device_new_from_device_id(m->udev, ifindex_str);
+ if (!device) {
+ 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, "link pending udev initialization...");
+ return 0;
+ }
+
+ r = link_initialized(link, device);
+ if (r < 0)
+ return r;
+ } else {
+ /* we are calling a callback directly, so must take a ref */
+ link_ref(link);
+
+ r = link_initialized_and_synced(m->rtnl, NULL, link);
+ if (r < 0)
+ return r;
}
- return link_enter_enslave(link);
+ return 0;
}
int link_update(Link *link, sd_rtnl_message *m) {
- unsigned flags;
- void *data;
- uint16_t type;
+ struct ether_addr mac;
+ const char *ifname;
+ uint32_t mtu;
+ bool had_carrier, carrier_gained, carrier_lost;
int r;
assert(link);
+ assert(link->ifname);
assert(m);
- if (link->state == LINK_STATE_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;
+ }
+
+ 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: %"
+ 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;
+ }
+ }
}
- while (sd_rtnl_message_read(m, &type, &data) > 0) {
- if (type == IFLA_MTU && link->network->dhcp &&
- link->network->dhcp_mtu && !link->original_mtu) {
- link->original_mtu = *(uint16_t *) data;
- log_debug_link(link, "saved original MTU: %" PRIu16,
- link->original_mtu);
+ /* 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)) {
+
+ 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,
+ (const uint8_t *) &link->mac,
+ sizeof (link->mac),
+ ARPHRD_ETHER);
+ if (r < 0) {
+ log_warning_link(link,
+ "Could not update MAC address in DHCP client: %s",
+ strerror(-r));
+ return r;
+ }
+ }
+
+ if (link->dhcp6_client) {
+ r = sd_dhcp6_client_set_mac(link->dhcp6_client,
+ (const uint8_t *) &link->mac,
+ sizeof (link->mac),
+ ARPHRD_ETHER);
+ if (r < 0) {
+ log_warning_link(link,
+ "Could not update MAC address in DHCPv6 client: %s",
+ strerror(-r));
+ return r;
+ }
+ }
}
}
- return link_update_flags(link, flags);
+ 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) {
+
+ assert(link);
+
+ if (link->kernel_operstate == IF_OPER_DORMANT)
+ link->operstate = LINK_OPERSTATE_DORMANT;
+ 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;
+ }
+
+ 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 if (link->flags & IFF_UP)
+ link->operstate = LINK_OPERSTATE_NO_CARRIER;
+ else
+ link->operstate = LINK_OPERSTATE_OFF;
}
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)
- goto finish;
+ return r;
fchmod(fileno(f), 0644);
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",
+ admin_state, oper_state);
+
+ if (link->network) {
+ char **address, **domain;
+ bool space;
+
+ fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
+
+ 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) {
+ const struct in_addr *addresses;
+
+ r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
+ if (r > 0) {
+ if (space)
+ fputc(' ', f);
+ serialize_in_addrs(f, addresses, r);
+ }
+ }
+
+ 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) {
+ const struct in_addr *addresses;
+
+ r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
+ if (r > 0) {
+ if (space)
+ fputc(' ', f);
+ serialize_in_addrs(f, addresses, r);
+ }
+ }
+
+ 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) {
- const char *lease_file = "/run/systemd/network/leases/test.lease";
+ assert(link->network);
- r = dhcp_lease_save(link->dhcp_lease, lease_file);
+ r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
if (r < 0)
- goto finish;
+ goto fail;
- fprintf(f, "DHCP_LEASE=%s\n", lease_file);
- }
+ fprintf(f,
+ "DHCP_LEASE=%s\n",
+ link->lease_file);
+ } 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("Failed to save link data %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_PENDING] = "pending",
[LINK_STATE_ENSLAVING] = "configuring",
[LINK_STATE_SETTING_ADDRESSES] = "configuring",
[LINK_STATE_SETTING_ROUTES] = "configuring",
[LINK_STATE_CONFIGURED] = "configured",
+ [LINK_STATE_UNMANAGED] = "unmanaged",
[LINK_STATE_FAILED] = "failed",
+ [LINK_STATE_LINGER] = "linger",
};
DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
+
+static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
+ [LINK_OPERSTATE_OFF] = "off",
+ [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
+ [LINK_OPERSTATE_DORMANT] = "dormant",
+ [LINK_OPERSTATE_CARRIER] = "carrier",
+ [LINK_OPERSTATE_DEGRADED] = "degraded",
+ [LINK_OPERSTATE_ROUTABLE] = "routable",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);