#include "bus-util.h"
#include "net-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;
if (link->ifindex <= 0)
return -EINVAL;
+ r = asprintf(&link->state_file, "/run/systemd/network/links/%"PRIu64,
+ link->ifindex);
+ if (r < 0)
+ return -ENOMEM;
+
mac = udev_device_get_sysattr_value(device, "address");
if (mac) {
mac_addr = ether_aton(mac);
sd_dhcp_client_free(link->dhcp_client);
sd_dhcp_lease_unref(link->dhcp_lease);
+ sd_ipv4ll_free(link->ipv4ll);
+
hashmap_remove(link->manager->links, &link->ifindex);
free(link->ifname);
+ free(link->state_file);
free(link);
}
return 0;
}
-int link_add(Manager *m, struct udev_device *device, Link **ret) {
- Link *link = NULL;
- Network *network;
- int r;
-
- assert(m);
- assert(device);
-
- r = link_new(m, device, &link);
- if (r < 0)
- return r;
-
- *ret = link;
-
- r = network_get(m, device, &network);
- if (r < 0)
- return r == -ENOENT ? 0 : r;
-
- r = network_apply(m, network, link);
- if (r < 0)
- return r;
-
- return 0;
-}
-
static int link_enter_configured(Link *link) {
assert(link);
assert(link->state == LINK_STATE_SETTING_ROUTES);
link->state = LINK_STATE_CONFIGURED;
+ link_save(link);
+
return 0;
}
log_warning_link(link, "failed");
link->state = LINK_STATE_FAILED;
+
+ link_save(link);
}
static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
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)
+ if (!link->network->static_routes && !link->dhcp_lease &&
+ (!link->ipv4ll || sd_ipv4ll_get_address(link->ipv4ll, &a) < 0))
return link_enter_configured(link);
log_debug_link(link, "setting routes");
link->route_messages ++;
}
+ if (link->ipv4ll && !link->dhcp_lease) {
+ _cleanup_route_free_ Route *route = NULL;
+ struct in_addr addr;
+
+ r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
+ if (r < 0 && r != -ENOENT) {
+ log_warning_link(link, "IPV4LL error: no address: %s",
+ strerror(-r));
+ return r;
+ }
+
+ if (r != -ENOENT) {
+ r = 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->scope = RT_SCOPE_LINK;
+ route->metrics = 99;
+
+ r = route_configure(route, link, &route_handler);
+ if (r < 0) {
+ log_warning_link(link,
+ "could not set routes: %s", strerror(-r));
+ link_enter_failed(link);
+ return r;
+ }
+
+ link->route_messages ++;
+ }
+ }
+
if (link->dhcp_lease) {
_cleanup_route_free_ Route *route = NULL;
struct in_addr gateway;
return 0;
}
+static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(m);
+ assert(link);
+ assert(link->ifname);
+
+ if (link->state == LINK_STATE_FAILED)
+ 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 route: %s",
+ link->ifname, strerror(-r),
+ "ERRNO=%d", -r,
+ NULL);
+
+ return 0;
+}
+
static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
Link *link = userdata;
int r;
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)
+ if (!link->network->static_addresses && !link->dhcp_lease &&
+ (!link->ipv4ll || sd_ipv4ll_get_address(link->ipv4ll, &a) < 0))
return link_enter_set_routes(link);
log_debug_link(link, "setting addresses");
link->addr_messages ++;
}
+ if (link->ipv4ll && !link->dhcp_lease) {
+ _cleanup_address_free_ Address *ll_addr = NULL;
+ struct in_addr addr;
+
+ r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
+ if (r < 0 && r != -ENOENT) {
+ log_warning_link(link, "IPV4LL error: no address: %s",
+ strerror(-r));
+ return r;
+ }
+
+ if (r != -ENOENT) {
+ r = address_new_dynamic(&ll_addr);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate address: %s", strerror(-r));
+ return r;
+ }
+
+ ll_addr->family = AF_INET;
+ ll_addr->in_addr.in = addr;
+ ll_addr->prefixlen = 16;
+ ll_addr->broadcast.s_addr = ll_addr->in_addr.in.s_addr | htonl(0xfffffffflu >> ll_addr->prefixlen);
+ ll_addr->scope = RT_SCOPE_LINK;
+
+ r = address_configure(ll_addr, link, &address_handler);
+ if (r < 0) {
+ log_warning_link(link,
+ "could not set addresses: %s", strerror(-r));
+ link_enter_failed(link);
+ return r;
+ }
+
+ link->addr_messages ++;
+ }
+ }
+
if (link->dhcp_lease) {
_cleanup_address_free_ Address *address = NULL;
struct in_addr addr;
"ERRNO=%d", -r,
NULL);
- return 1;
+ return 0;
}
static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
address->in_addr.in = addr;
address->prefixlen = prefixlen;
- address_drop(address, link, address_drop_handler);
+ address_drop(address, link, &address_drop_handler);
}
if (link->network->dhcp_mtu) {
}
}
+ if (event == DHCP_EVENT_EXPIRED && link->network->ipv4ll) {
+ r = sd_ipv4ll_start (link->ipv4ll);
+ if (r < 0) {
+ link_enter_failed(link);
+ return;
+ }
+ }
+
break;
case DHCP_EVENT_IP_ACQUIRE:
r = dhcp_lease_acquired(client, link);
link_enter_failed(link);
return;
}
+ if (link->ipv4ll) {
+ r = sd_ipv4ll_stop(link->ipv4ll);
+ if (r < 0) {
+ link_enter_failed(link);
+ return;
+ }
+ }
break;
default:
if (event < 0)
return;
}
+static int ipv4ll_address_lost(sd_ipv4ll *ll, Link *link) {
+ int r;
+ struct in_addr addr;
+
+ assert(ll);
+ assert(link);
+
+ r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
+ if (r >= 0) {
+ _cleanup_address_free_ Address *address = NULL;
+ _cleanup_route_free_ Route *route = NULL;
+
+ log_debug_link(link, "IPv4 link-local release %u.%u.%u.%u",
+ ADDRESS_FMT_VAL(addr));
+
+ r = address_new_dynamic(&address);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate address: %s", strerror(-r));
+ return r;
+ }
+
+ address->family = AF_INET;
+ address->in_addr.in = addr;
+ address->prefixlen = 16;
+ address->scope = RT_SCOPE_LINK;
+
+ address_drop(address, link, &address_drop_handler);
+
+ r = route_new_dynamic(&route);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate route: %s",
+ strerror(-r));
+ return r;
+ }
+
+ route->family = AF_INET;
+ route->scope = RT_SCOPE_LINK;
+ route->metrics = 99;
+
+ route_drop(route, link, &route_drop_handler);
+ }
+
+ return 0;
+}
+
+static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) {
+ struct in_addr address;
+ int r;
+
+ assert(ll);
+ assert(link);
+
+ r = sd_ipv4ll_get_address(ll, &address);
+ if (r < 0)
+ return r;
+
+ log_struct_link(LOG_INFO, link,
+ "MESSAGE=%s: IPv4 link-local address %u.%u.%u.%u",
+ link->ifname,
+ ADDRESS_FMT_VAL(address),
+ NULL);
+
+ link_enter_set_addresses(link);
+
+ return 0;
+}
+
+static void ipv4ll_handler(sd_ipv4ll *ll, int event, void *userdata){
+ Link *link = userdata;
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->manager);
+
+ switch(event) {
+ case IPV4LL_EVENT_STOP:
+ case IPV4LL_EVENT_CONFLICT:
+ r = ipv4ll_address_lost(ll, link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return;
+ }
+ break;
+ case IPV4LL_EVENT_BIND:
+ r = ipv4ll_address_claimed(ll, link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return;
+ }
+ break;
+ default:
+ if (event < 0)
+ log_warning_link(link, "IPv4 link-local error: %s", strerror(-event));
+ else
+ log_warning_link(link, "IPv4 link-local unknown event: %d", event);
+ break;
+ }
+}
+
static int link_acquire_conf(Link *link) {
int r;
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;
+ if (link->network->ipv4ll) {
+ if (!link->ipv4ll) {
+ r = sd_ipv4ll_new(&link->ipv4ll);
+ if (r < 0)
+ return r;
- r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
- if (r < 0)
- return r;
+ r = sd_ipv4ll_attach_event(link->ipv4ll, 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_ipv4ll_set_index(link->ipv4ll, 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_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;
+ }
- r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp_handler, link);
+ log_debug_link(link, "acquiring IPv4 link-local address");
+
+ r = sd_ipv4ll_start(link->ipv4ll);
if (r < 0)
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;
- if (link->network->dhcp_mtu) {
- r = sd_dhcp_client_set_request_option(link->dhcp_client, 26);
+ 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;
+ }
}
- }
- log_debug_link(link, "acquiring DHCPv4 lease");
+ log_debug_link(link, "acquiring DHCPv4 lease");
- r = sd_dhcp_client_start(link->dhcp_client);
- if (r < 0)
- return r;
+ r = sd_dhcp_client_start(link->dhcp_client);
+ if (r < 0)
+ return r;
+ }
return 0;
}
if (link->state == LINK_STATE_FAILED)
return 0;
- if (link->flags == flags) {
- log_debug_link(link, "link status unchanged: %#.8x", flags);
+ if (link->flags == flags)
return 0;
- }
if ((link->flags & IFF_UP) != (flags & IFF_UP))
log_info_link(link,
if (flags & IFF_LOWER_UP) {
log_info_link(link, "carrier on");
- if (link->network->dhcp) {
+ if (link->network->dhcp || link->network->ipv4ll) {
r = link_acquire_conf(link);
if (r < 0) {
- log_warning_link(link, "Could not acquire DHCPv4 lease: %s", strerror(-r));
+ log_warning_link(link, "Could not acquire configuration: %s", strerror(-r));
link_enter_failed(link);
return r;
}
return r;
}
}
+
+ 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;
+ }
+ }
}
}
- log_debug_link(link,
- "link status updated: %#.8x -> %#.8x", link->flags, flags);
+ log_debug_link(link, "link status updated: %#.8x -> %#.8x",
+ link->flags, flags);
link->flags = flags;
return 1;
r = sd_rtnl_message_get_errno(m);
- if (r < 0) {
- log_struct_link(LOG_ERR, link,
+ if (r >= 0)
+ link_update_flags(link, link->flags | IFF_UP);
+ else
+ log_struct_link(LOG_WARNING, link,
"MESSAGE=%s: could not bring up interface: %s",
link->ifname, strerror(-r),
"ERRNO=%d", -r,
NULL);
- link_enter_failed(link);
- return 1;
- }
-
- link_update_flags(link, link->flags | IFF_UP);
-
return 1;
}
return r;
}
- if (!link->network->dhcp)
+ if (!link->network->dhcp && !link->network->ipv4ll)
return link_enter_set_addresses(link);
return 0;
}
static int link_enter_enslave(Link *link) {
- NetDev *vlan;
+ NetDev *vlan, *macvlan;
Iterator i;
int r;
link->state = LINK_STATE_ENSLAVING;
+ link_save(link);
+
if (!link->network->bridge && !link->network->bond &&
- hashmap_isempty(link->network->vlans))
+ hashmap_isempty(link->network->vlans) &&
+ hashmap_isempty(link->network->macvlans))
return link_enslaved(link);
if (link->network->bridge) {
link->enslaving ++;
}
+ if (link->network->bond) {
+ log_struct_link(LOG_DEBUG, link,
+ "MESSAGE=%s: enslaving by '%s'",
+ link->ifname, link->network->bond->name,
+ NETDEV(link->network->bond),
+ NULL);
+
+ r = netdev_enslave(link->network->bond, link, &enslave_handler);
+ if (r < 0) {
+ log_struct_link(LOG_WARNING, link,
+ "MESSAGE=%s: could not enslave by '%s': %s",
+ link->ifname, link->network->bond->name, strerror(-r),
+ NETDEV(link->network->bond),
+ NULL);
+ link_enter_failed(link);
+ return r;
+ }
+
+ link->enslaving ++;
+ }
+
HASHMAP_FOREACH(vlan, link->network->vlans, i) {
log_struct_link(LOG_DEBUG, link,
"MESSAGE=%s: enslaving by '%s'",
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);
+
+ 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),
+ NETDEV(macvlan), NULL);
+ link_enter_failed(link);
+ return r;
+ }
+
+ link->enslaving ++;
+ }
+
return 0;
}
return 1;
}
- log_debug_link(link, "got link state");
-
link_update(link, m);
return 1;
return 0;
}
-int link_configure(Link *link) {
+static int link_configure(Link *link) {
int r;
assert(link);
- assert(link->network);
assert(link->state == _LINK_STATE_INVALID);
r = link_getlink(link);
- if (r < 0) {
- link_enter_failed(link);
+ if (r < 0)
return r;
- }
return link_enter_enslave(link);
}
+int link_add(Manager *m, struct udev_device *device, Link **ret) {
+ Link *link = NULL;
+ Network *network;
+ int r;
+
+ assert(m);
+ assert(device);
+
+ r = link_new(m, device, &link);
+ if (r < 0)
+ return r;
+
+ *ret = link;
+
+ r = network_get(m, device, &network);
+ if (r < 0)
+ return r == -ENOENT ? 0 : r;
+
+ r = network_apply(m, network, link);
+ if (r < 0)
+ return r;
+
+ r = link_configure(link);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
int link_update(Link *link, sd_rtnl_message *m) {
unsigned flags;
- void *data;
- uint16_t type;
int r;
assert(link);
+ assert(link->network);
assert(m);
if (link->state == LINK_STATE_FAILED)
return 0;
+ if (link->network->dhcp && link->network->dhcp_mtu &&
+ !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);
+ 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]);
+ }
+
r = sd_rtnl_message_link_get_flags(m, &flags);
if (r < 0) {
log_warning_link(link, "Could not get link flags");
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);
- }
+ return link_update_flags(link, flags);
+}
+
+int link_save(Link *link) {
+ _cleanup_free_ char *temp_path = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ int r;
+
+ assert(link);
+ assert(link->state_file);
+
+ r = fopen_temporary(link->state_file, &f, &temp_path);
+ if (r < 0)
+ goto finish;
+
+ fchmod(fileno(f), 0644);
+
+ fprintf(f,
+ "# This is private data. Do not parse.\n"
+ "STATE=%s\n",
+ link_state_to_string(link->state));
+
+ if (link->dhcp_lease) {
+ char *lease_file;
+
+ r = asprintf(&lease_file, "/run/systemd/network/leases/%"PRIu64,
+ link->ifindex);
+ if (r < 0)
+ return -ENOMEM;
+
+ r = dhcp_lease_save(link->dhcp_lease, lease_file);
+ if (r < 0)
+ goto finish;
+
+ fprintf(f, "DHCP_LEASE=%s\n", lease_file);
}
- return link_update_flags(link, flags);
+ fflush(f);
+
+ if (ferror(f) || rename(temp_path, link->state_file) < 0) {
+ r = -errno;
+ unlink(link->state_file);
+ unlink(temp_path);
+ }
+
+finish:
+ if (r < 0)
+ log_error("Failed to save link data %s: %s", link->state_file, strerror(-r));
+
+ return r;
}
+
+static const char* const link_state_table[_LINK_STATE_MAX] = {
+ [LINK_STATE_ENSLAVING] = "configuring",
+ [LINK_STATE_SETTING_ADDRESSES] = "configuring",
+ [LINK_STATE_SETTING_ROUTES] = "configuring",
+ [LINK_STATE_CONFIGURED] = "configured",
+ [LINK_STATE_FAILED] = "failed",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);