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;
}
int link_routing_policy_rule_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
assert(rtnl);
assert(m);
assert(link);
assert(link->ifname);
assert(link->routing_policy_rule_messages > 0);
link->routing_policy_rule_messages--;
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return 1;
r = sd_netlink_message_get_errno(m);
if (r < 0 && r != -EEXIST)
log_link_warning_errno(link, r, "Could not add routing policy rule: %m");
if (link->routing_policy_rule_messages == 0) {
log_link_debug(link, "Routing policy rule configured");
link->routing_policy_rules_configured = true;
link_check_ready(link);
}
return 1;
}
static int set_brvlan_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 add VLAN to bridge port: %m");
return 1;
}
static int set_fdb_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
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 add FDB entry: %m");
return 1;
}
static int pipe_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
int *counter = userdata;
int r;
(*counter)--;
r = sd_netlink_message_get_errno(m);
log_info_errno(r, "%d left in pipe. got reply: %m", *counter);
assert_se(r >= 0);
return 1;
}
/* callback for bridge netdev's parameter set */
static int netdev_bridge_set_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) {
int r;
assert(netdev);
assert(m);
r = sd_netlink_message_get_errno(m);
if (r < 0) {
log_netdev_warning_errno(netdev, r, "Bridge parameters could not be set: %m");
return 1;
}
log_netdev_debug(netdev, "Bridge parameters set success");
return 1;
}
/* callback for brige netdev's parameter set */
static int netdev_bridge_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
_cleanup_netdev_unref_ NetDev *netdev = userdata;
int r;
assert(netdev);
assert(m);
r = sd_netlink_message_get_errno(m);
if (r < 0) {
log_netdev_warning_errno(netdev, r, "Bridge parameters could not be set: %m");
return 1;
}
log_netdev_debug(netdev, "Bridge parametres set success");
return 1;
}
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 route_expire_callback(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
Link *link = userdata;
int r;
assert(rtnl);
assert(m);
assert(link);
assert(link->ifname);
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return 1;
r = sd_netlink_message_get_errno(m);
if (r < 0 && r != -EEXIST)
log_link_warning_errno(link, r, "could not remove route: %m");
return 1;
}
static int routing_policy_rule_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
assert(m);
assert(link);
assert(link->ifname);
link->routing_policy_rule_remove_messages--;
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return 1;
r = sd_netlink_message_get_errno(m);
if (r < 0)
log_link_warning_errno(link, r, "Could not drop routing policy rule: %m");
return 1;
}
/* callback for geneve netdev's created without a backing Link */
static int geneve_netdev_create_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) {
int r;
assert(netdev);
assert(netdev->state != _NETDEV_STATE_INVALID);
r = sd_netlink_message_get_errno(m);
if (r == -EEXIST)
log_netdev_info(netdev, "Geneve netdev exists, using existing without changing its parameters");
else if (r < 0) {
log_netdev_warning_errno(netdev, r, "Geneve netdev could not be created: %m");
netdev_drop(netdev);
return 1;
}
log_netdev_debug(netdev, "Geneve created");
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 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_netlink *rtnl, sd_netlink_message *m, void *userdata) {
_cleanup_link_unref_ 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(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_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;
}
int local_addresses(sd_netlink *context, int ifindex, int af, struct local_address **ret) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
_cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
_cleanup_free_ struct local_address *list = NULL;
size_t n_list = 0, n_allocated = 0;
sd_netlink_message *m;
int r;
assert(ret);
if (context)
rtnl = sd_netlink_ref(context);
else {
r = sd_netlink_open(&rtnl);
if (r < 0)
return r;
}
r = sd_rtnl_message_new_addr(rtnl, &req, RTM_GETADDR, 0, af);
if (r < 0)
return r;
r = sd_netlink_call(rtnl, req, 0, &reply);
if (r < 0)
return r;
for (m = reply; m; m = sd_netlink_message_next(m)) {
struct local_address *a;
unsigned char flags;
uint16_t type;
int ifi, family;
r = sd_netlink_message_get_errno(m);
if (r < 0)
return r;
r = sd_netlink_message_get_type(m, &type);
if (r < 0)
return r;
if (type != RTM_NEWADDR)
continue;
r = sd_rtnl_message_addr_get_ifindex(m, &ifi);
if (r < 0)
return r;
if (ifindex > 0 && ifi != ifindex)
continue;
r = sd_rtnl_message_addr_get_family(m, &family);
if (r < 0)
return r;
if (af != AF_UNSPEC && af != family)
continue;
r = sd_rtnl_message_addr_get_flags(m, &flags);
if (r < 0)
return r;
if (flags & IFA_F_DEPRECATED)
continue;
if (!GREEDY_REALLOC0(list, n_allocated, n_list+1))
return -ENOMEM;
a = list + n_list;
r = sd_rtnl_message_addr_get_scope(m, &a->scope);
if (r < 0)
return r;
if (ifindex == 0 && IN_SET(a->scope, RT_SCOPE_HOST, RT_SCOPE_NOWHERE))
continue;
switch (family) {
case AF_INET:
r = sd_netlink_message_read_in_addr(m, IFA_LOCAL, &a->address.in);
if (r < 0) {
r = sd_netlink_message_read_in_addr(m, IFA_ADDRESS, &a->address.in);
if (r < 0)
continue;
}
break;
case AF_INET6:
r = sd_netlink_message_read_in6_addr(m, IFA_LOCAL, &a->address.in6);
if (r < 0) {
r = sd_netlink_message_read_in6_addr(m, IFA_ADDRESS, &a->address.in6);
if (r < 0)
continue;
}
break;
default:
continue;
}
a->ifindex = ifi;
a->family = family;
n_list++;
};
qsort_safe(list, n_list, sizeof(struct local_address), address_compare);
*ret = TAKE_PTR(list);
return (int) n_list;
}
static void test_message(sd_netlink *rtnl) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
assert_se(rtnl_message_new_synthetic_error(rtnl, -ETIMEDOUT, 1, &m) >= 0);
assert_se(sd_netlink_message_get_errno(m) == -ETIMEDOUT);
}
static int get_gateway_description(
sd_netlink *rtnl,
sd_hwdb *hwdb,
int ifindex,
int family,
union in_addr_union *gateway,
char **gateway_description) {
_cleanup_netlink_message_unref_ sd_netlink_message *req = NULL, *reply = NULL;
sd_netlink_message *m;
int r;
assert(rtnl);
assert(ifindex >= 0);
assert(family == AF_INET || family == AF_INET6);
assert(gateway);
assert(gateway_description);
r = sd_rtnl_message_new_neigh(rtnl, &req, RTM_GETNEIGH, ifindex, family);
if (r < 0)
return r;
r = sd_netlink_message_request_dump(req, true);
if (r < 0)
return r;
r = sd_netlink_call(rtnl, req, 0, &reply);
if (r < 0)
return r;
for (m = reply; m; m = sd_netlink_message_next(m)) {
union in_addr_union gw = {};
struct ether_addr mac = {};
uint16_t type;
int ifi, fam;
r = sd_netlink_message_get_errno(m);
if (r < 0) {
log_error_errno(r, "got error: %m");
continue;
}
r = sd_netlink_message_get_type(m, &type);
if (r < 0) {
log_error_errno(r, "could not get type: %m");
continue;
}
if (type != RTM_NEWNEIGH) {
log_error("type is not RTM_NEWNEIGH");
continue;
}
r = sd_rtnl_message_neigh_get_family(m, &fam);
if (r < 0) {
log_error_errno(r, "could not get family: %m");
continue;
}
if (fam != family) {
log_error("family is not correct");
continue;
}
r = sd_rtnl_message_neigh_get_ifindex(m, &ifi);
if (r < 0) {
log_error_errno(r, "could not get ifindex: %m");
continue;
}
if (ifindex > 0 && ifi != ifindex)
continue;
switch (fam) {
case AF_INET:
r = sd_netlink_message_read_in_addr(m, NDA_DST, &gw.in);
if (r < 0)
continue;
break;
case AF_INET6:
r = sd_netlink_message_read_in6_addr(m, NDA_DST, &gw.in6);
if (r < 0)
continue;
break;
default:
continue;
}
if (!in_addr_equal(fam, &gw, gateway))
continue;
r = sd_netlink_message_read_ether_addr(m, NDA_LLADDR, &mac);
if (r < 0)
continue;
r = ieee_oui(hwdb, &mac, gateway_description);
if (r < 0)
continue;
return 0;
}
return -ENODATA;
}
int local_gateways(sd_netlink *context, int ifindex, int af, struct local_address **ret) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
_cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
_cleanup_free_ struct local_address *list = NULL;
sd_netlink_message *m = NULL;
size_t n_list = 0, n_allocated = 0;
int r;
assert(ret);
if (context)
rtnl = sd_netlink_ref(context);
else {
r = sd_netlink_open(&rtnl);
if (r < 0)
return r;
}
r = sd_rtnl_message_new_route(rtnl, &req, RTM_GETROUTE, af, RTPROT_UNSPEC);
if (r < 0)
return r;
r = sd_netlink_message_request_dump(req, true);
if (r < 0)
return r;
r = sd_netlink_call(rtnl, req, 0, &reply);
if (r < 0)
return r;
for (m = reply; m; m = sd_netlink_message_next(m)) {
struct local_address *a;
uint16_t type;
unsigned char dst_len, src_len;
uint32_t ifi;
int family;
r = sd_netlink_message_get_errno(m);
if (r < 0)
return r;
r = sd_netlink_message_get_type(m, &type);
if (r < 0)
return r;
if (type != RTM_NEWROUTE)
continue;
/* We only care for default routes */
r = sd_rtnl_message_route_get_dst_prefixlen(m, &dst_len);
if (r < 0)
return r;
if (dst_len != 0)
continue;
r = sd_rtnl_message_route_get_src_prefixlen(m, &src_len);
if (r < 0)
return r;
if (src_len != 0)
continue;
r = sd_netlink_message_read_u32(m, RTA_OIF, &ifi);
if (r == -ENODATA) /* Not all routes have an RTA_OIF attribute (for example nexthop ones) */
continue;
if (r < 0)
return r;
if (ifindex > 0 && (int) ifi != ifindex)
continue;
r = sd_rtnl_message_route_get_family(m, &family);
if (r < 0)
return r;
if (af != AF_UNSPEC && af != family)
continue;
if (!GREEDY_REALLOC0(list, n_allocated, n_list + 1))
return -ENOMEM;
a = list + n_list;
switch (family) {
case AF_INET:
r = sd_netlink_message_read_in_addr(m, RTA_GATEWAY, &a->address.in);
if (r < 0)
continue;
break;
case AF_INET6:
r = sd_netlink_message_read_in6_addr(m, RTA_GATEWAY, &a->address.in6);
if (r < 0)
continue;
break;
default:
continue;
}
sd_netlink_message_read_u32(m, RTA_PRIORITY, &a->metric);
a->ifindex = ifi;
a->family = family;
n_list++;
}
if (n_list > 0)
qsort(list, n_list, sizeof(struct local_address), address_compare);
*ret = TAKE_PTR(list);
return (int) n_list;
}