static void
mac_create(switchlink_mac_addr_t mac_addr, switchlink_handle_t bridge_h,
switchlink_handle_t intf_h) {
switchlink_handle_t old_intf_h;
switchlink_db_status_t status;
status = switchlink_db_mac_get_intf(mac_addr, bridge_h, &old_intf_h);
if (status == SWITCHLINK_DB_STATUS_SUCCESS) {
if (old_intf_h == intf_h) {
// no change
return;
} else {
// update handled as delete followed by add
mac_delete(mac_addr, bridge_h);
}
}
switchlink_mac_create(mac_addr, bridge_h, intf_h);
switchlink_db_mac_add(mac_addr, bridge_h, intf_h);
}
void
process_neigh_msg(struct nlmsghdr *nlmsg, int type) {
int hdrlen, attrlen;
struct nlattr *attr;
struct ndmsg *nbh;
switchlink_mac_addr_t mac_addr;
bool mac_addr_valid = false;
bool ipaddr_valid = false;
switchlink_ip_addr_t ipaddr;
assert((type == RTM_NEWNEIGH) || (type == RTM_DELNEIGH));
nbh = nlmsg_data(nlmsg);
hdrlen = sizeof(struct ndmsg);
NL_LOG_DEBUG(("%sneigh: family = %d, ifindex = %d, state = 0x%x, "
"flags = 0x%x, type = %d\n",
((type == RTM_NEWNEIGH) ? "new" : "del"),
nbh->ndm_family, nbh->ndm_ifindex, nbh->ndm_state,
nbh->ndm_flags, nbh->ndm_type));
switchlink_db_interface_info_t ifinfo;
if (switchlink_db_interface_get_info(nbh->ndm_ifindex, &ifinfo) !=
SWITCHLINK_DB_STATUS_SUCCESS) {
NL_LOG_DEBUG(("neigh: switchlink_db_interface_get_info failed\n"));
return;
}
if (strncmp(ifinfo.ifname, SWITCHLINK_CPU_INTERFACE_NAME,
SWITCHLINK_INTERFACE_NAME_LEN_MAX) == 0) {
NL_LOG_DEBUG(("neigh: skipping neighbor on CPU interface\n"));
return;
}
memset(&ipaddr, 0, sizeof(switchlink_ip_addr_t));
attrlen = nlmsg_attrlen(nlmsg, hdrlen);
attr = nlmsg_attrdata(nlmsg, hdrlen);
while (nla_ok(attr, attrlen)) {
int attr_type = nla_type(attr);
switch (attr_type) {
case NDA_DST:
ipaddr_valid = true;
ipaddr.family = nbh->ndm_family;
if (nbh->ndm_family == AF_INET) {
ipaddr.ip.v4addr.s_addr = ntohl(nla_get_u32(attr));
ipaddr.prefix_len = 32;
} else {
memcpy(&(ipaddr.ip.v6addr), nla_data(attr), nla_len(attr));
ipaddr.prefix_len = 128;
}
break;
case NDA_LLADDR: {
uint64_t lladdr;
mac_addr_valid = true;
lladdr = nla_get_u64(attr);
memcpy(mac_addr, &lladdr, 6);
break;
}
default:
NL_LOG_DEBUG(("neigh: skipping attr(%d)\n", attr_type));
break;
}
attr = nla_next(attr, &attrlen);
}
switchlink_handle_t intf_h = ifinfo.intf_h;
switchlink_handle_t bridge_h = 0;
if (ifinfo.intf_type == SWITCHLINK_INTF_TYPE_L2_ACCESS) {
bridge_h = ifinfo.bridge_h;
assert(bridge_h);
}
if (type == RTM_NEWNEIGH) {
if (bridge_h && mac_addr_valid) {
mac_create(mac_addr, bridge_h, intf_h);
}
if (ipaddr_valid) {
if (mac_addr_valid) {
neigh_create(g_default_vrf_h, &ipaddr, mac_addr, intf_h);
} else {
// mac address is not valid, remove the neighbor entry
neigh_delete(g_default_vrf_h, &ipaddr, intf_h);
}
}
} else {
if (bridge_h && mac_addr_valid) {
mac_delete(mac_addr, bridge_h);
}
if (ipaddr_valid) {
neigh_delete(g_default_vrf_h, &ipaddr, intf_h);
}
}
}
