static void ipv4ll_handler(sd_ipv4ll *ll, int event, void *userdata){
Link *link = userdata;
int r;
assert(link);
assert(link->network);
assert(link->manager);
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return;
switch(event) {
case SD_IPV4LL_EVENT_STOP:
case SD_IPV4LL_EVENT_CONFLICT:
r = ipv4ll_address_lost(link);
if (r < 0) {
link_enter_failed(link);
return;
}
break;
case SD_IPV4LL_EVENT_BIND:
r = ipv4ll_address_claimed(ll, link);
if (r < 0) {
link_enter_failed(link);
return;
}
break;
default:
log_link_warning(link, "IPv4 link-local unknown event: %d", event);
break;
}
}
static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
int r;
Link *link = userdata;
assert(link);
assert(link->network);
assert(link->manager);
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return;
switch(event) {
case SD_DHCP6_CLIENT_EVENT_STOP:
case SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE:
case SD_DHCP6_CLIENT_EVENT_RETRANS_MAX:
if (sd_dhcp6_client_get_lease(client, NULL) >= 0)
log_link_warning(link, "DHCPv6 lease lost");
link->dhcp6_configured = false;
break;
case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE:
r = dhcp6_lease_address_acquired(client, link);
if (r < 0) {
link_enter_failed(link);
return;
}
/* fall through */
case SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST:
r = dhcp6_lease_information_acquired(client, link);
if (r < 0) {
link_enter_failed(link);
return;
}
link->dhcp6_configured = true;
break;
default:
if (event < 0)
log_link_warning_errno(link, event, "DHCPv6 error: %m");
else
log_link_warning(link, "DHCPv6 unknown event: %d", event);
return;
}
link_check_ready(link);
}
static int dhcp6_address_handler(sd_netlink *rtnl, sd_netlink_message *m,
void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
assert(link);
r = sd_netlink_message_get_errno(m);
if (r < 0 && r != -EEXIST) {
if (link->rtnl_extended_attrs) {
log_link_warning(link, "Could not set extended netlink attributes, reverting to fallback mechanism");
link->rtnl_extended_attrs = false;
dhcp6_lease_address_acquired(link->dhcp6_client, link);
return 1;
}
log_link_error_errno(link, r, "Could not set DHCPv6 address: %m");
link_enter_failed(link);
} else if (r >= 0)
manager_rtnl_process_address(rtnl, m, link->manager);
return 1;
}
static void ndisc_router_process_default(Link *link, sd_ndisc_router *rt) {
_cleanup_route_free_ Route *route = NULL;
struct in6_addr gateway;
uint16_t lifetime;
unsigned preference;
usec_t time_now;
int r;
assert(link);
assert(rt);
r = sd_ndisc_router_get_lifetime(rt, &lifetime);
if (r < 0) {
log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
return;
}
if (lifetime == 0) /* not a default router */
return;
r = sd_ndisc_router_get_address(rt, &gateway);
if (r < 0) {
log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
return;
}
r = sd_ndisc_router_get_preference(rt, &preference);
if (r < 0) {
log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m");
return;
}
r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
if (r < 0) {
log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
return;
}
r = route_new(&route);
if (r < 0) {
log_link_error_errno(link, r, "Could not allocate route: %m");
return;
}
route->family = AF_INET6;
route->table = RT_TABLE_MAIN;
route->protocol = RTPROT_RA;
route->pref = preference;
route->gw.in6 = gateway;
route->lifetime = time_now + lifetime * USEC_PER_SEC;
r = route_configure(route, link, ndisc_netlink_handler);
if (r < 0) {
log_link_warning_errno(link, r, "Could not set default route: %m");
link_enter_failed(link);
return;
}
link->ndisc_messages++;
}
static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
int r;
Link *link = userdata;
assert(link);
assert(link->network);
assert(link->manager);
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return;
switch(event) {
case DHCP6_EVENT_STOP:
case DHCP6_EVENT_RESEND_EXPIRE:
case DHCP6_EVENT_RETRANS_MAX:
log_link_debug(link, "DHCPv6 event %d", event);
break;
case DHCP6_EVENT_IP_ACQUIRE:
r = dhcp6_lease_address_acquired(client, link);
if (r < 0) {
link_enter_failed(link);
return;
}
/* fall through */
case DHCP6_EVENT_INFORMATION_REQUEST:
r = dhcp6_lease_information_acquired(client, link);
if (r < 0) {
link_enter_failed(link);
return;
}
break;
default:
if (event < 0)
log_link_warning(link, "DHCPv6 error: %s",
strerror(-event));
else
log_link_warning(link, "DHCPv6 unknown event: %d",
event);
return;
}
}
static int dhcp_lease_renew(sd_dhcp_client *client, Link *link) {
sd_dhcp_lease *lease;
struct in_addr address;
struct in_addr netmask;
uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
int r;
assert(link);
assert(client);
assert(link->network);
r = sd_dhcp_client_get_lease(client, &lease);
if (r < 0) {
log_link_warning(link, "DHCP error: no lease %s",
strerror(-r));
return r;
}
sd_dhcp_lease_unref(link->dhcp_lease);
link->dhcp4_configured = false;
link->dhcp_lease = sd_dhcp_lease_ref(lease);
r = sd_dhcp_lease_get_address(lease, &address);
if (r < 0) {
log_link_warning(link, "DHCP error: no address: %s",
strerror(-r));
return r;
}
r = sd_dhcp_lease_get_netmask(lease, &netmask);
if (r < 0) {
log_link_warning(link, "DHCP error: no netmask: %s",
strerror(-r));
return r;
}
if (!link->network->dhcp_critical) {
r = sd_dhcp_lease_get_lifetime(link->dhcp_lease,
&lifetime);
if (r < 0) {
log_link_warning(link,
"DHCP error: no lifetime: %s",
strerror(-r));
return r;
}
}
r = dhcp4_update_address(link, &address, &netmask, lifetime);
if (r < 0) {
log_link_warning(link, "could not update IP address: %s",
strerror(-r));
link_enter_failed(link);
return r;
}
return 0;
}
static void ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt) {
_cleanup_route_free_ Route *route = NULL;
usec_t time_now;
uint32_t lifetime;
unsigned prefixlen;
int r;
assert(link);
assert(rt);
r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
if (r < 0) {
log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
return;
}
r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen);
if (r < 0) {
log_link_error_errno(link, r, "Failed to get prefix length: %m");
return;
}
r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime);
if (r < 0) {
log_link_error_errno(link, r, "Failed to get prefix lifetime: %m");
return;
}
r = route_new(&route);
if (r < 0) {
log_link_error_errno(link, r, "Could not allocate route: %m");
return;
}
route->family = AF_INET6;
route->table = RT_TABLE_MAIN;
route->protocol = RTPROT_RA;
route->flags = RTM_F_PREFIX;
route->dst_prefixlen = prefixlen;
route->lifetime = time_now + lifetime * USEC_PER_SEC;
r = sd_ndisc_router_prefix_get_address(rt, &route->dst.in6);
if (r < 0) {
log_link_error_errno(link, r, "Failed to get prefix address: %m");
return;
}
r = route_configure(route, link, ndisc_netlink_handler);
if (r < 0) {
log_link_warning_errno(link, r, "Could not set prefix route: %m");
link_enter_failed(link);
return;
}
link->ndisc_messages++;
}
static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m,
void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
assert(link);
r = sd_netlink_message_get_errno(m);
if (r < 0 && r != -EEXIST) {
log_link_error_errno(link, r, "Could not set DHCPv4 address: %m");
link_enter_failed(link);
} else if (r >= 0)
manager_rtnl_process_address(rtnl, m, link->manager);
link_set_dhcp_routes(link);
return 1;
}
static int dhcp6_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m,
void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
assert(link);
r = sd_rtnl_message_get_errno(m);
if (r < 0 && r != -EEXIST) {
log_link_error(link, "Could not set DHCPv6 address: %s",
strerror(-r));
link_enter_failed(link);
} else if (r >= 0)
link_rtnl_process_address(rtnl, m, link->manager);
return 1;
}
static int ipv4ll_route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
assert(link);
assert(!link->ipv4ll_route);
r = sd_netlink_message_get_errno(m);
if (r < 0 && r != -EEXIST) {
log_link_error_errno(link, r, "could not set ipv4ll route: %m");
link_enter_failed(link);
}
link->ipv4ll_route = true;
if (link->ipv4ll_address == true)
link_check_ready(link);
return 1;
}
static int ipv4ll_address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
_cleanup_(link_unrefp) Link *link = userdata;
int r;
assert(link);
assert(!link->ipv4ll_address);
r = sd_netlink_message_get_errno(m);
if (r < 0 && r != -EEXIST) {
log_link_error_errno(link, r, "could not set ipv4ll address: %m");
link_enter_failed(link);
} else if (r >= 0)
manager_rtnl_process_address(rtnl, m, link->manager);
link->ipv4ll_address = true;
if (link->ipv4ll_route)
link_check_ready(link);
return 1;
}
static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
int r;
assert(link);
assert(link->dhcp4_messages > 0);
link->dhcp4_messages--;
r = sd_netlink_message_get_errno(m);
if (r < 0 && r != -EEXIST) {
log_link_error_errno(link, r, "Could not set DHCPv4 route: %m");
link_enter_failed(link);
}
if (link->dhcp4_messages == 0) {
link->dhcp4_configured = true;
link_check_ready(link);
}
return 1;
}
static int ipv4ll_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
assert(link);
assert(!link->ipv4ll_address);
r = sd_rtnl_message_get_errno(m);
if (r < 0 && r != -EEXIST) {
log_link_error(link, "could not set ipv4ll address: %s", strerror(-r));
link_enter_failed(link);
} else if (r >= 0)
link_rtnl_process_address(rtnl, m, link->manager);
link->ipv4ll_address = true;
if (link->ipv4ll_route == true)
link_client_handler(link);
return 1;
}
static int ndisc_netlink_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
assert(link);
assert(link->ndisc_messages > 0);
link->ndisc_messages--;
r = sd_netlink_message_get_errno(m);
if (r < 0 && r != -EEXIST) {
log_link_error_errno(link, r, "Could not set NDisc route or address: %m");
link_enter_failed(link);
}
if (link->ndisc_messages == 0) {
link->ndisc_configured = true;
link_check_ready(link);
}
return 1;
}
static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m,
void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
assert(link);
assert(link->dhcp4_messages);
link->dhcp4_messages --;
r = sd_netlink_message_get_errno(m);
if (r < 0 && r != -EEXIST) {
log_link_error_errno(link, r, "Could not set DHCPv4 route: %m");
link_enter_failed(link);
}
if (!link->dhcp4_messages) {
link->dhcp4_configured = true;
link_check_ready(link);
}
return 1;
}
static int dhcp4_route_handler(sd_rtnl *rtnl, sd_rtnl_message *m,
void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
assert(link);
assert(link->dhcp4_messages);
link->dhcp4_messages --;
r = sd_rtnl_message_get_errno(m);
if (r < 0 && r != -EEXIST) {
log_link_error(link, "could not set DHCPv4 route: %s",
strerror(-r));
link_enter_failed(link);
}
if (!link->dhcp4_messages) {
link->dhcp4_configured = true;
link_client_handler(link);
}
return 1;
}
static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
int r;
assert(link);
r = sd_netlink_message_get_errno(m);
if (r < 0 && r != -EEXIST) {
log_link_error_errno(link, r, "Could not set DHCPv4 address: %m");
link_enter_failed(link);
} else if (r >= 0)
manager_rtnl_process_address(rtnl, m, link->manager);
link_set_dhcp_routes(link);
/* Add back static routes since kernel removes while DHCPv4 address is removed from when lease expires */
link_request_set_routes(link);
if (link->dhcp4_messages == 0) {
link->dhcp4_configured = true;
link_check_ready(link);
}
return 1;
}
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;
uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
int r;
assert(client);
assert(link);
r = sd_dhcp_client_get_lease(client, &lease);
if (r < 0)
return log_link_error_errno(link, r, "DHCP error: No lease: %m");
r = sd_dhcp_lease_get_address(lease, &address);
if (r < 0)
return log_link_error_errno(link, r, "DHCP error: No address: %m");
r = sd_dhcp_lease_get_netmask(lease, &netmask);
if (r < 0)
return log_link_error_errno(link, r, "DHCP error: No netmask: %m");
prefixlen = in_addr_netmask_to_prefixlen(&netmask);
r = sd_dhcp_lease_get_router(lease, &gateway);
if (r < 0 && r != -ENODATA)
return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m");
if (r >= 0)
log_struct(LOG_INFO,
LOG_LINK_INTERFACE(link),
LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
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(LOG_INFO,
LOG_LINK_INTERFACE(link),
LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u",
ADDRESS_FMT_VAL(address),
prefixlen),
"ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
"PREFIXLEN=%u", prefixlen,
NULL);
link->dhcp_lease = sd_dhcp_lease_ref(lease);
link_dirty(link);
if (link->network->dhcp_use_mtu) {
uint16_t mtu;
r = sd_dhcp_lease_get_mtu(lease, &mtu);
if (r >= 0) {
r = link_set_mtu(link, mtu);
if (r < 0)
log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu);
}
}
if (link->network->dhcp_use_hostname) {
const char *hostname = NULL;
if (link->network->dhcp_hostname)
hostname = link->network->dhcp_hostname;
else
(void) sd_dhcp_lease_get_hostname(lease, &hostname);
if (hostname) {
r = manager_set_hostname(link->manager, hostname);
if (r < 0)
log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname);
}
}
if (link->network->dhcp_use_timezone) {
const char *tz = NULL;
(void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
if (tz) {
r = manager_set_timezone(link->manager, tz);
if (r < 0)
log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz);
}
}
if (!link->network->dhcp_critical) {
r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);
if (r < 0) {
log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");
return r;
}
}
r = dhcp4_update_address(link, &address, &netmask, lifetime);
if (r < 0) {
log_link_warning_errno(link, r, "Could not update IP address: %m");
link_enter_failed(link);
return r;
}
return 0;
}
static void dhcp4_handler(sd_dhcp_client *client, int event, void *userdata) {
Link *link = userdata;
int r = 0;
assert(link);
assert(link->network);
assert(link->manager);
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return;
switch (event) {
case SD_DHCP_CLIENT_EVENT_EXPIRED:
case SD_DHCP_CLIENT_EVENT_STOP:
case SD_DHCP_CLIENT_EVENT_IP_CHANGE:
if (link->network->dhcp_critical) {
log_link_error(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 == SD_DHCP_CLIENT_EVENT_IP_CHANGE) {
r = dhcp_lease_acquired(client, link);
if (r < 0) {
link_enter_failed(link);
return;
}
}
break;
case SD_DHCP_CLIENT_EVENT_RENEW:
r = dhcp_lease_renew(client, link);
if (r < 0) {
link_enter_failed(link);
return;
}
break;
case SD_DHCP_CLIENT_EVENT_IP_ACQUIRE:
r = dhcp_lease_acquired(client, link);
if (r < 0) {
link_enter_failed(link);
return;
}
break;
default:
if (event < 0)
log_link_warning_errno(link, event, "DHCP error: Client failed: %m");
else
log_link_warning(link, "DHCP unknown event: %i", event);
break;
}
return;
}
static int dhcp_lease_lost(Link *link) {
_cleanup_address_free_ Address *address = NULL;
struct in_addr addr;
struct in_addr netmask;
struct in_addr gateway;
unsigned prefixlen = 0;
int r;
assert(link);
assert(link->dhcp_lease);
log_link_warning(link, "DHCP lease lost");
if (link->network->dhcp_use_routes) {
_cleanup_free_ sd_dhcp_route **routes = NULL;
int n, i;
n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes);
if (n >= 0) {
for (i = 0; i < n; i++) {
_cleanup_route_free_ Route *route = NULL;
r = route_new(&route);
if (r >= 0) {
route->family = AF_INET;
assert_se(sd_dhcp_route_get_gateway(routes[i], &route->gw.in) >= 0);
assert_se(sd_dhcp_route_get_destination(routes[i], &route->dst.in) >= 0);
assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &route->dst_prefixlen) >= 0);
route_remove(route, link,
link_route_remove_handler);
}
}
}
}
r = address_new(&address);
if (r >= 0) {
r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
if (r >= 0) {
_cleanup_route_free_ Route *route_gw = NULL;
_cleanup_route_free_ Route *route = NULL;
r = route_new(&route_gw);
if (r >= 0) {
route_gw->family = AF_INET;
route_gw->dst.in = gateway;
route_gw->dst_prefixlen = 32;
route_gw->scope = RT_SCOPE_LINK;
route_remove(route_gw, link,
link_route_remove_handler);
}
r = route_new(&route);
if (r >= 0) {
route->family = AF_INET;
route->gw.in = gateway;
route_remove(route, link,
link_route_remove_handler);
}
}
r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
if (r >= 0) {
r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
if (r >= 0)
prefixlen = in_addr_netmask_to_prefixlen(&netmask);
address->family = AF_INET;
address->in_addr.in = addr;
address->prefixlen = prefixlen;
address_remove(address, link, link_address_remove_handler);
}
}
if (link->network->dhcp_use_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_link_warning(link,
"DHCP error: could not reset MTU");
link_enter_failed(link);
return r;
}
}
}
if (link->network->dhcp_use_hostname) {
const char *hostname = NULL;
if (link->network->dhcp_hostname)
hostname = link->network->dhcp_hostname;
else
(void) sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname);
if (hostname) {
/* If a hostname was set due to the lease, then unset it now. */
r = manager_set_hostname(link->manager, NULL);
if (r < 0)
log_link_warning_errno(link, r, "Failed to reset transient hostname: %m");
}
}
link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
link_dirty(link);
link->dhcp4_configured = false;
return 0;
}
static void ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *rt) {
_cleanup_address_free_ Address *address = NULL;
uint32_t lifetime_valid, lifetime_preferred;
unsigned prefixlen;
int r;
assert(link);
assert(rt);
r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen);
if (r < 0) {
log_link_error_errno(link, r, "Failed to get prefix length: %m");
return;
}
r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_valid);
if (r < 0) {
log_link_error_errno(link, r, "Failed to get prefix valid lifetime: %m");
return;
}
r = sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime_preferred);
if (r < 0) {
log_link_error_errno(link, r, "Failed to get prefix preferred lifetime: %m");
return;
}
r = address_new(&address);
if (r < 0) {
log_link_error_errno(link, r, "Could not allocate address: %m");
return;
}
address->family = AF_INET6;
r = sd_ndisc_router_prefix_get_address(rt, &address->in_addr.in6);
if (r < 0) {
log_link_error_errno(link, r, "Failed to get prefix address: %m");
return;
}
if (in_addr_is_null(AF_INET6, (const union in_addr_union *) &link->network->ipv6_token) == 0)
memcpy(((char *)&address->in_addr.in6) + 8, ((char *)&link->network->ipv6_token) + 8, 8);
else {
/* see RFC4291 section 2.5.1 */
address->in_addr.in6.s6_addr[8] = link->mac.ether_addr_octet[0];
address->in_addr.in6.s6_addr[8] ^= 1 << 1;
address->in_addr.in6.s6_addr[9] = link->mac.ether_addr_octet[1];
address->in_addr.in6.s6_addr[10] = link->mac.ether_addr_octet[2];
address->in_addr.in6.s6_addr[11] = 0xff;
address->in_addr.in6.s6_addr[12] = 0xfe;
address->in_addr.in6.s6_addr[13] = link->mac.ether_addr_octet[3];
address->in_addr.in6.s6_addr[14] = link->mac.ether_addr_octet[4];
address->in_addr.in6.s6_addr[15] = link->mac.ether_addr_octet[5];
}
address->prefixlen = prefixlen;
address->flags = IFA_F_NOPREFIXROUTE|IFA_F_MANAGETEMPADDR;
address->cinfo.ifa_prefered = lifetime_preferred;
address->cinfo.ifa_valid = lifetime_valid;
r = address_configure(address, link, ndisc_netlink_handler, true);
if (r < 0) {
log_link_warning_errno(link, r, "Could not set SLAAC address: %m");
link_enter_failed(link);
return;
}
link->ndisc_messages++;
}
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;
uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
int r;
assert(client);
assert(link);
r = sd_dhcp_client_get_lease(client, &lease);
if (r < 0) {
log_link_warning(link, "DHCP error: no lease: %s",
strerror(-r));
return r;
}
r = sd_dhcp_lease_get_address(lease, &address);
if (r < 0) {
log_link_warning(link, "DHCP error: no address: %s",
strerror(-r));
return r;
}
r = sd_dhcp_lease_get_netmask(lease, &netmask);
if (r < 0) {
log_link_warning(link, "DHCP error: no netmask: %s",
strerror(-r));
return r;
}
prefixlen = in_addr_netmask_to_prefixlen(&netmask);
r = sd_dhcp_lease_get_router(lease, &gateway);
if (r < 0 && r != -ENOENT) {
log_link_warning(link, "DHCP error: could not get gateway: %s",
strerror(-r));
return r;
}
if (r >= 0)
log_link_struct(link, LOG_INFO,
"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_link_struct(link, LOG_INFO,
"MESSAGE=%-*s: DHCPv4 address %u.%u.%u.%u/%u",
IFNAMSIZ,
link->ifname,
ADDRESS_FMT_VAL(address),
prefixlen,
"ADDRESS=%u.%u.%u.%u",
ADDRESS_FMT_VAL(address),
"PREFIXLEN=%u",
prefixlen,
NULL);
link->dhcp_lease = lease;
if (link->network->dhcp_mtu) {
uint16_t mtu;
r = sd_dhcp_lease_get_mtu(lease, &mtu);
if (r >= 0) {
r = link_set_mtu(link, mtu);
if (r < 0)
log_link_error(link, "Failed to set MTU "
"to %" PRIu16, mtu);
}
}
if (link->network->dhcp_hostname) {
const char *hostname;
r = sd_dhcp_lease_get_hostname(lease, &hostname);
if (r >= 0) {
r = link_set_hostname(link, hostname);
if (r < 0)
log_link_error(link,
"Failed to set transient hostname to '%s'",
hostname);
}
}
if (!link->network->dhcp_critical) {
r = sd_dhcp_lease_get_lifetime(link->dhcp_lease,
&lifetime);
if (r < 0) {
log_link_warning(link,
"DHCP error: no lifetime: %s",
strerror(-r));
return r;
}
}
r = dhcp4_update_address(link, &address, &netmask, lifetime);
if (r < 0) {
log_link_warning(link, "could not update IP address: %s",
strerror(-r));
link_enter_failed(link);
return r;
}
return 0;
}
static int link_set_dhcp_routes(Link *link) {
struct in_addr gateway, address;
_cleanup_free_ sd_dhcp_route **static_routes = NULL;
int r, n, i;
assert(link);
assert(link->dhcp_lease);
assert(link->network);
if (!link->network->dhcp_use_routes)
return 0;
r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
if (r < 0)
return log_link_warning_errno(link, r, "DHCP error: could not get address: %m");
r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
if (r < 0 && r != -ENODATA)
return log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m");
if (r >= 0) {
_cleanup_route_free_ Route *route = NULL;
_cleanup_route_free_ Route *route_gw = NULL;
r = route_new(&route);
if (r < 0)
return log_link_error_errno(link, r, "Could not allocate route: %m");
route->protocol = RTPROT_DHCP;
r = route_new(&route_gw);
if (r < 0)
return log_link_error_errno(link, r, "Could not allocate route: %m");
/* 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.in = gateway;
route_gw->dst_prefixlen = 32;
route_gw->prefsrc.in = address;
route_gw->scope = RT_SCOPE_LINK;
route_gw->protocol = RTPROT_DHCP;
route_gw->priority = link->network->dhcp_route_metric;
route_gw->table = link->network->dhcp_route_table;
r = route_configure(route_gw, link, dhcp4_route_handler);
if (r < 0)
return log_link_warning_errno(link, r, "Could not set host route: %m");
link->dhcp4_messages++;
route->family = AF_INET;
route->gw.in = gateway;
route->prefsrc.in = address;
route->priority = link->network->dhcp_route_metric;
route->table = link->network->dhcp_route_table;
r = route_configure(route, link, dhcp4_route_handler);
if (r < 0) {
log_link_warning_errno(link, r, "Could not set routes: %m");
link_enter_failed(link);
return r;
}
link->dhcp4_messages++;
}
n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
if (n == -ENODATA)
return 0;
if (n < 0)
return log_link_warning_errno(link, n, "DHCP error: could not get routes: %m");
for (i = 0; i < n; i++) {
_cleanup_route_free_ Route *route = NULL;
r = route_new(&route);
if (r < 0)
return log_link_error_errno(link, r, "Could not allocate route: %m");
route->family = AF_INET;
route->protocol = RTPROT_DHCP;
assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0);
assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0);
assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0);
route->priority = link->network->dhcp_route_metric;
route->table = link->network->dhcp_route_table;
route->scope = route_scope_from_address(route, &address);
r = route_configure(route, link, dhcp4_route_handler);
if (r < 0)
return log_link_warning_errno(link, r, "Could not set host route: %m");
link->dhcp4_messages++;
}
return 0;
}
static int link_set_dhcp_routes(Link *link) {
struct in_addr gateway;
struct sd_dhcp_route *static_routes;
int r, n, i;
assert(link);
assert(link->dhcp_lease);
r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
if (r < 0 && r != -ENOENT) {
log_link_warning(link,
"DHCP error: could not get gateway: %s",
strerror(-r));
return r;
}
if (r >= 0) {
struct in_addr address;
_cleanup_route_free_ Route *route = NULL;
_cleanup_route_free_ Route *route_gw = NULL;
r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
if (r < 0) {
log_link_warning(link,
"DHCP error: could not get address: %s",
strerror(-r));
return r;
}
r = route_new_dynamic(&route, RTPROT_DHCP);
if (r < 0) {
log_link_error(link,
"Could not allocate route: %s",
strerror(-r));
return r;
}
r = route_new_dynamic(&route_gw, RTPROT_DHCP);
if (r < 0) {
log_link_error(link,
"Could not allocate route: %s",
strerror(-r));
return r;
}
/* The dhcp netmask may mask out the gateway. Add an explicit
* route for the gw host so that we can route no matter the
* netmask or existing kernel route tables. */
route_gw->family = AF_INET;
route_gw->dst_addr.in = gateway;
route_gw->dst_prefixlen = 32;
route_gw->prefsrc_addr.in = address;
route_gw->scope = RT_SCOPE_LINK;
route_gw->metrics = link->network->dhcp_route_metric;
r = route_configure(route_gw, link, &dhcp4_route_handler);
if (r < 0) {
log_link_warning(link,
"could not set host route: %s",
strerror(-r));
return r;
}
link->dhcp4_messages ++;
route->family = AF_INET;
route->in_addr.in = gateway;
route->prefsrc_addr.in = address;
route->metrics = link->network->dhcp_route_metric;
r = route_configure(route, link, &dhcp4_route_handler);
if (r < 0) {
log_link_warning(link,
"could not set routes: %s",
strerror(-r));
link_enter_failed(link);
return r;
}
link->dhcp4_messages ++;
}
n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
if (n == -ENOENT)
return 0;
if (n < 0) {
log_link_warning(link,
"DHCP error: could not get routes: %s",
strerror(-n));
return n;
}
for (i = 0; i < n; i++) {
_cleanup_route_free_ Route *route = NULL;
r = route_new_dynamic(&route, RTPROT_DHCP);
if (r < 0) {
log_link_error(link, "Could not allocate route: %s",
strerror(-r));
return r;
}
route->family = AF_INET;
route->in_addr.in = static_routes[i].gw_addr;
route->dst_addr.in = static_routes[i].dst_addr;
route->dst_prefixlen = static_routes[i].dst_prefixlen;
route->metrics = link->network->dhcp_route_metric;
r = route_configure(route, link, &dhcp4_route_handler);
if (r < 0) {
log_link_warning(link,
"could not set host route: %s",
strerror(-r));
return r;
}
link->dhcp4_messages ++;
}
return 0;
}
static int link_set_dhcp_routes(Link *link) {
_cleanup_free_ sd_dhcp_route **static_routes = NULL;
bool classless_route = false, static_route = false;
const struct in_addr *router;
struct in_addr address;
int r, n, i;
uint32_t table;
assert(link);
if (!link->dhcp_lease) /* link went down while we configured the IP addresses? */
return 0;
if (!link->network) /* link went down while we configured the IP addresses? */
return 0;
if (!link->network->dhcp_use_routes)
return 0;
table = link_get_dhcp_route_table(link);
r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
if (r < 0)
return log_link_warning_errno(link, r, "DHCP error: could not get address: %m");
n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
if (n == -ENODATA)
log_link_debug_errno(link, n, "DHCP: No routes received from DHCP server: %m");
else if (n < 0)
log_link_debug_errno(link, n, "DHCP error: could not get routes: %m");
for (i = 0; i < n; i++) {
switch (sd_dhcp_route_get_option(static_routes[i])) {
case SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE:
classless_route = true;
break;
case SD_DHCP_OPTION_STATIC_ROUTE:
static_route = true;
break;
}
}
for (i = 0; i < n; i++) {
_cleanup_(route_freep) Route *route = NULL;
/* if the DHCP server returns both a Classless Static Routes option and a Static Routes option,
the DHCP client MUST ignore the Static Routes option. */
if (classless_route &&
sd_dhcp_route_get_option(static_routes[i]) != SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE)
continue;
r = route_new(&route);
if (r < 0)
return log_link_error_errno(link, r, "Could not allocate route: %m");
route->family = AF_INET;
route->protocol = RTPROT_DHCP;
assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0);
assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0);
assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0);
route->priority = link->network->dhcp_route_metric;
route->table = table;
route->scope = route_scope_from_address(route, &address);
r = route_configure(route, link, dhcp4_route_handler);
if (r < 0)
return log_link_warning_errno(link, r, "Could not set host route: %m");
link->dhcp4_messages++;
}
r = sd_dhcp_lease_get_router(link->dhcp_lease, &router);
if (IN_SET(r, 0, -ENODATA))
log_link_info(link, "DHCP: No gateway received from DHCP server.");
else if (r < 0)
log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m");
else if (in4_addr_is_null(&router[0]))
log_link_info(link, "DHCP: Received gateway is null.");
/* According to RFC 3442: If the DHCP server returns both a Classless Static Routes option and
a Router option, the DHCP client MUST ignore the Router option. */
if (classless_route && static_route)
log_link_warning(link, "Classless static routes received from DHCP server: ignoring static-route option and router option");
if (r > 0 && !classless_route && !in4_addr_is_null(&router[0])) {
_cleanup_(route_freep) Route *route = NULL, *route_gw = NULL;
r = route_new(&route_gw);
if (r < 0)
return log_link_error_errno(link, r, "Could not allocate route: %m");
/* 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.in = router[0];
route_gw->dst_prefixlen = 32;
route_gw->prefsrc.in = address;
route_gw->scope = RT_SCOPE_LINK;
route_gw->protocol = RTPROT_DHCP;
route_gw->priority = link->network->dhcp_route_metric;
route_gw->table = table;
r = route_configure(route_gw, link, dhcp4_route_handler);
if (r < 0)
return log_link_warning_errno(link, r, "Could not set host route: %m");
link->dhcp4_messages++;
r = route_new(&route);
if (r < 0)
return log_link_error_errno(link, r, "Could not allocate route: %m");
route->family = AF_INET;
route->gw.in = router[0];
route->prefsrc.in = address;
route->protocol = RTPROT_DHCP;
route->priority = link->network->dhcp_route_metric;
route->table = table;
r = route_configure(route, link, dhcp4_route_handler);
if (r < 0) {
log_link_warning_errno(link, r, "Could not set routes: %m");
link_enter_failed(link);
return r;
}
link->dhcp4_messages++;
}
return 0;
}
static int dhcp_lease_lost(Link *link) {
_cleanup_address_free_ Address *address = NULL;
struct in_addr addr;
struct in_addr netmask;
struct in_addr gateway;
unsigned prefixlen = 0;
int r;
assert(link);
assert(link->dhcp_lease);
log_link_warning(link, "DHCP lease lost");
if (link->network->dhcp_routes) {
struct sd_dhcp_route *routes;
int n, i;
n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes);
if (n >= 0) {
for (i = 0; i < n; i++) {
_cleanup_route_free_ Route *route = NULL;
r = route_new_dynamic(&route, RTPROT_UNSPEC);
if (r >= 0) {
route->family = AF_INET;
route->in_addr.in = routes[i].gw_addr;
route->dst_addr.in = routes[i].dst_addr;
route->dst_prefixlen = routes[i].dst_prefixlen;
route_drop(route, link,
&link_route_drop_handler);
}
}
}
}
r = address_new_dynamic(&address);
if (r >= 0) {
r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
if (r >= 0) {
_cleanup_route_free_ Route *route_gw = NULL;
_cleanup_route_free_ Route *route = NULL;
r = route_new_dynamic(&route_gw, RTPROT_UNSPEC);
if (r >= 0) {
route_gw->family = AF_INET;
route_gw->dst_addr.in = gateway;
route_gw->dst_prefixlen = 32;
route_gw->scope = RT_SCOPE_LINK;
route_drop(route_gw, link,
&link_route_drop_handler);
}
r = route_new_dynamic(&route, RTPROT_UNSPEC);
if (r >= 0) {
route->family = AF_INET;
route->in_addr.in = gateway;
route_drop(route, link,
&link_route_drop_handler);
}
}
r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
if (r >= 0) {
r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
if (r >= 0)
prefixlen = in_addr_netmask_to_prefixlen(&netmask);
address->family = AF_INET;
address->in_addr.in = addr;
address->prefixlen = prefixlen;
address_drop(address, link, &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_link_warning(link,
"DHCP error: could not reset MTU");
link_enter_failed(link);
return r;
}
}
}
if (link->network->dhcp_hostname) {
const char *hostname = NULL;
if (!link->network->hostname)
r = sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname);
else
hostname = link->network->hostname;
if (r >= 0 || hostname) {
r = link_set_hostname(link, hostname);
if (r < 0)
log_link_error_errno(link, r,
"Failed to set transient hostname to '%s': %m",
hostname);
}
}
link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
link->dhcp4_configured = false;
return 0;
}
static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
const struct in_addr *router;
sd_dhcp_lease *lease;
struct in_addr address;
struct in_addr netmask;
unsigned prefixlen;
uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
int r;
assert(client);
assert(link);
r = sd_dhcp_client_get_lease(client, &lease);
if (r < 0)
return log_link_error_errno(link, r, "DHCP error: No lease: %m");
r = sd_dhcp_lease_get_address(lease, &address);
if (r < 0)
return log_link_error_errno(link, r, "DHCP error: No address: %m");
r = sd_dhcp_lease_get_netmask(lease, &netmask);
if (r < 0)
return log_link_error_errno(link, r, "DHCP error: No netmask: %m");
prefixlen = in4_addr_netmask_to_prefixlen(&netmask);
r = sd_dhcp_lease_get_router(lease, &router);
if (r < 0 && r != -ENODATA)
return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m");
if (r > 0 && !in4_addr_is_null(&router[0]))
log_struct(LOG_INFO,
LOG_LINK_INTERFACE(link),
LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
ADDRESS_FMT_VAL(address),
prefixlen,
ADDRESS_FMT_VAL(router[0])),
"ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
"PREFIXLEN=%u", prefixlen,
"GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(router[0]));
else
log_struct(LOG_INFO,
LOG_LINK_INTERFACE(link),
LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u",
ADDRESS_FMT_VAL(address),
prefixlen),
"ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
"PREFIXLEN=%u", prefixlen);
link->dhcp_lease = sd_dhcp_lease_ref(lease);
link_dirty(link);
if (link->network->dhcp_use_mtu) {
uint16_t mtu;
r = sd_dhcp_lease_get_mtu(lease, &mtu);
if (r >= 0) {
r = link_set_mtu(link, mtu, true);
if (r < 0)
log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu);
}
}
if (link->network->dhcp_use_hostname) {
const char *dhcpname = NULL;
_cleanup_free_ char *hostname = NULL;
if (link->network->dhcp_hostname)
dhcpname = link->network->dhcp_hostname;
else
(void) sd_dhcp_lease_get_hostname(lease, &dhcpname);
if (dhcpname) {
r = shorten_overlong(dhcpname, &hostname);
if (r < 0)
log_link_warning_errno(link, r, "Unable to shorten overlong DHCP hostname '%s', ignoring: %m", dhcpname);
if (r == 1)
log_link_notice(link, "Overlong DHCP hostname received, shortened from '%s' to '%s'", dhcpname, hostname);
}
if (hostname) {
r = manager_set_hostname(link->manager, hostname);
if (r < 0)
log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname);
}
}
if (link->network->dhcp_use_timezone) {
const char *tz = NULL;
(void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
if (tz) {
r = manager_set_timezone(link->manager, tz);
if (r < 0)
log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz);
}
}
if (!link->network->dhcp_critical) {
r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);
if (r < 0)
return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");
}
r = dhcp4_update_address(link, &address, &netmask, lifetime);
if (r < 0) {
log_link_warning_errno(link, r, "Could not update IP address: %m");
link_enter_failed(link);
return r;
}
return 0;
}
static int link_set_dhcp_routes(Link *link) {
_cleanup_free_ sd_dhcp_route **static_routes = NULL;
bool classless_route = false, static_route = false;
struct in_addr gateway, address;
int r, n, i;
uint32_t table;
assert(link);
if (!link->dhcp_lease) /* link went down while we configured the IP addresses? */
return 0;
if (!link->network) /* link went down while we configured the IP addresses? */
return 0;
if (!link->network->dhcp_use_routes)
return 0;
/* When the interface is part of an VRF use the VRFs routing table, unless
* there is a another table specified. */
table = link->network->dhcp_route_table;
if (!link->network->dhcp_route_table_set && link->network->vrf != NULL)
table = VRF(link->network->vrf)->table;
r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
if (r < 0)
return log_link_warning_errno(link, r, "DHCP error: could not get address: %m");
n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
if (n < 0)
log_link_debug_errno(link, n, "DHCP error: could not get routes: %m");
for (i = 0; i < n; i++) {
if (static_routes[i]->option == SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE)
classless_route = true;
if (static_routes[i]->option == SD_DHCP_OPTION_STATIC_ROUTE)
static_route = true;
}
for (i = 0; i < n; i++) {
_cleanup_route_free_ Route *route = NULL;
/* if the DHCP server returns both a Classless Static Routes option and a Static Routes option,
the DHCP client MUST ignore the Static Routes option. */
if (classless_route && static_routes[i]->option == SD_DHCP_OPTION_STATIC_ROUTE)
continue;
r = route_new(&route);
if (r < 0)
return log_link_error_errno(link, r, "Could not allocate route: %m");
route->family = AF_INET;
route->protocol = RTPROT_DHCP;
assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0);
assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0);
assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0);
route->priority = link->network->dhcp_route_metric;
route->table = table;
route->scope = route_scope_from_address(route, &address);
r = route_configure(route, link, dhcp4_route_handler);
if (r < 0)
return log_link_warning_errno(link, r, "Could not set host route: %m");
link->dhcp4_messages++;
}
r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
if (r == -ENODATA)
log_link_info_errno(link, r, "DHCP: No routes received from DHCP server: %m");
else if (r < 0)
log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m");
/* According to RFC 3442: If the DHCP server returns both a Classless Static Routes option and
a Router option, the DHCP client MUST ignore the Router option. */
if (classless_route && static_route)
log_link_warning(link, "Classless static routes received from DHCP server: ignoring static-route option and router option");
if (r >= 0 && !classless_route) {
_cleanup_route_free_ Route *route = NULL;
_cleanup_route_free_ Route *route_gw = NULL;
r = route_new(&route);
if (r < 0)
return log_link_error_errno(link, r, "Could not allocate route: %m");
route->protocol = RTPROT_DHCP;
r = route_new(&route_gw);
if (r < 0)
return log_link_error_errno(link, r, "Could not allocate route: %m");
/* 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.in = gateway;
route_gw->dst_prefixlen = 32;
route_gw->prefsrc.in = address;
route_gw->scope = RT_SCOPE_LINK;
route_gw->protocol = RTPROT_DHCP;
route_gw->priority = link->network->dhcp_route_metric;
route_gw->table = table;
r = route_configure(route_gw, link, dhcp4_route_handler);
if (r < 0)
return log_link_warning_errno(link, r, "Could not set host route: %m");
link->dhcp4_messages++;
route->family = AF_INET;
route->gw.in = gateway;
route->prefsrc.in = address;
route->priority = link->network->dhcp_route_metric;
route->table = table;
r = route_configure(route, link, dhcp4_route_handler);
if (r < 0) {
log_link_warning_errno(link, r, "Could not set routes: %m");
link_enter_failed(link);
return r;
}
link->dhcp4_messages++;
}
return 0;
}
