void neigh_create(switchlink_handle_t vrf_h,
switchlink_ip_addr_t *ipaddr,
switchlink_mac_addr_t mac_addr,
switchlink_handle_t intf_h) {
switchlink_db_status_t status;
switchlink_db_neigh_info_t neigh_info;
if ((ipaddr->family == AF_INET6) &&
IN6_IS_ADDR_MULTICAST(&(ipaddr->ip.v6addr))) {
return;
}
memset(&neigh_info, 0, sizeof(switchlink_db_neigh_info_t));
neigh_info.vrf_h = vrf_h;
neigh_info.intf_h = intf_h;
memcpy(&(neigh_info.ip_addr), ipaddr, sizeof(switchlink_ip_addr_t));
status = switchlink_db_neighbor_get_info(&neigh_info);
if (status == SWITCHLINK_DB_STATUS_SUCCESS) {
if (memcmp(neigh_info.mac_addr, mac_addr, sizeof(switchlink_mac_addr_t)) ==
0) {
// no change
return;
}
// update, currently handled as a delete followed by add
neigh_delete(vrf_h, ipaddr, intf_h);
}
memcpy(neigh_info.mac_addr, mac_addr, sizeof(switchlink_mac_addr_t));
if (switchlink_nexthop_create(&neigh_info) == -1) {
return;
}
if (switchlink_neighbor_create(&neigh_info) == -1) {
switchlink_nexthop_delete(&neigh_info);
return;
}
switchlink_db_neighbor_add(&neigh_info);
// add a host route
route_create(g_default_vrf_h, ipaddr, ipaddr, 0, intf_h);
}
static void
neigh_delete(switchlink_handle_t vrf_h, switchlink_ip_addr_t *ipaddr,
switchlink_handle_t intf_h) {
switchlink_db_neigh_info_t neigh_info;
switchlink_db_status_t status;
memset(&neigh_info, 0, sizeof(switchlink_db_neigh_info_t));
neigh_info.vrf_h = vrf_h;
neigh_info.intf_h = intf_h;
memcpy(&(neigh_info.ip_addr), ipaddr, sizeof(switchlink_ip_addr_t));
status = switchlink_db_neighbor_get_info(&neigh_info);
if (status != SWITCHLINK_DB_STATUS_SUCCESS) {
return;
}
switchlink_neighbor_delete(&neigh_info);
switchlink_nexthop_delete(&neigh_info);
switchlink_db_neighbor_delete(&neigh_info);
// delete the host route
route_delete(g_default_vrf_h, ipaddr);
}
void
route_create(switchlink_handle_t vrf_h, switchlink_ip_addr_t *dst,
switchlink_ip_addr_t *gateway, switchlink_handle_t ecmp_h,
switchlink_handle_t intf_h) {
if (!dst || (!gateway && !ecmp_h)) {
if (ecmp_h) {
ecmp_delete(ecmp_h);
}
return;
}
bool ecmp_valid = false;
switchlink_handle_t nhop_h = 0;
if (!ecmp_h) {
switchlink_db_neigh_info_t neigh_info;
memset(&neigh_info, 0, sizeof(switchlink_db_neigh_info_t));
memcpy(&(neigh_info.ip_addr), gateway, sizeof(switchlink_ip_addr_t));
neigh_info.intf_h = intf_h;
neigh_info.vrf_h = vrf_h;
switchlink_db_status_t status;
status = switchlink_db_neighbor_get_info(&neigh_info);
if (status == SWITCHLINK_DB_STATUS_SUCCESS) {
nhop_h = neigh_info.nhop_h;
} else {
nhop_h = g_cpu_rx_nhop_h;
}
ecmp_valid = false;
} else {
ecmp_valid = true;
nhop_h = ecmp_h;
}
// get the route from the db (if it already exists)
switchlink_db_route_info_t route_info;
memset(&route_info, 0, sizeof(switchlink_db_route_info_t));
route_info.vrf_h = vrf_h;
memcpy(&(route_info.ip_addr), dst, sizeof(switchlink_ip_addr_t));
switchlink_db_status_t status = switchlink_db_route_get_info(&route_info);
if (status == SWITCHLINK_DB_STATUS_SUCCESS) {
if ((route_info.ecmp == ecmp_valid) && (route_info.nhop_h == nhop_h)) {
// no change
return;
}
// nexthop has change, delete the current route
route_delete(vrf_h, dst);
}
memset(&route_info, 0, sizeof(switchlink_db_route_info_t));
route_info.vrf_h = vrf_h;
memcpy(&(route_info.ip_addr), dst, sizeof(switchlink_ip_addr_t));
route_info.ecmp = ecmp_valid;
route_info.nhop_h = nhop_h;
// add the route
if (switchlink_route_create(&route_info) == -1) {
if (route_info.ecmp) {
ecmp_delete(route_info.nhop_h);
}
return;
}
// add the route to the db
if (switchlink_db_route_add(&route_info) == SWITCHLINK_DB_STATUS_SUCCESS) {
if (route_info.ecmp) {
switchlink_db_ecmp_ref_inc(route_info.nhop_h);
}
}
}
static switchlink_handle_t
process_ecmp(uint8_t family, struct nlattr *attr, switchlink_handle_t vrf_h) {
switchlink_db_status_t status;
if ((family != AF_INET) && (family != AF_INET6)) {
return 0;
}
switchlink_db_ecmp_info_t ecmp_info;
memset(&ecmp_info, 0, sizeof(switchlink_db_ecmp_info_t));
struct rtnexthop *rnh = (struct rtnexthop *)nla_data(attr);
int attrlen = nla_len(attr);
while (RTNH_OK(rnh, attrlen)) {
struct rtattr *rta = RTNH_DATA(rnh);
if (rta->rta_type == RTA_GATEWAY) {
switchlink_ip_addr_t gateway;
memset(&gateway, 0, sizeof(switchlink_ip_addr_t));
gateway.family = family;
if (family == AF_INET) {
gateway.ip.v4addr.s_addr = ntohl(*((uint32_t *)RTA_DATA(rta)));
gateway.prefix_len = 32;
} else {
gateway.prefix_len = 128;
}
switchlink_db_interface_info_t ifinfo;
memset(&ifinfo, 0, sizeof(switchlink_db_interface_info_t));
status = switchlink_db_interface_get_info(rnh->rtnh_ifindex,
&ifinfo);
if (status == SWITCHLINK_DB_STATUS_SUCCESS) {
switchlink_db_neigh_info_t neigh_info;
memset(&neigh_info, 0, sizeof(switchlink_db_neigh_info_t));
memcpy(&(neigh_info.ip_addr), &gateway,
sizeof(switchlink_ip_addr_t));
neigh_info.intf_h = ifinfo.intf_h;
neigh_info.vrf_h = vrf_h;
status = switchlink_db_neighbor_get_info(&neigh_info);
if (status == SWITCHLINK_DB_STATUS_SUCCESS) {
ecmp_info.nhops[ecmp_info.num_nhops] = neigh_info.nhop_h;
} else {
ecmp_info.nhops[ecmp_info.num_nhops] = g_cpu_rx_nhop_h;
}
ecmp_info.num_nhops++;
assert(ecmp_info.num_nhops < SWITCHLINK_ECMP_NUM_MEMBERS_MAX);
}
}
rnh = RTNH_NEXT(rnh);
}
if (!ecmp_info.num_nhops) {
return 0;
}
status = switchlink_db_ecmp_get_info(&ecmp_info);
if (status == SWITCHLINK_DB_STATUS_ITEM_NOT_FOUND) {
switchlink_ecmp_create(&ecmp_info);
switchlink_db_ecmp_add(&ecmp_info);
}
return ecmp_info.ecmp_h;
}
