//The following function supposed to be called under m_lock
bool dst_entry_udp_mc::resolve_net_dev()
{
bool ret_val = false;
cache_entry_subject<ip_address, net_device_val*>* p_ces = NULL;
if (m_mc_tx_if_ip.get_in_addr() != INADDR_ANY && !m_mc_tx_if_ip.is_mc()) {
if(m_p_net_dev_entry == NULL && g_p_net_device_table_mgr->register_observer(m_mc_tx_if_ip.get_in_addr(), this, &p_ces)) {
m_p_net_dev_entry = dynamic_cast<net_device_entry*>(p_ces);
}
if (m_p_net_dev_entry) {
m_p_net_dev_entry->get_val(m_p_net_dev_val);
if (m_p_net_dev_val && m_p_net_dev_val->is_valid()) {
ret_val = alloc_transport_dep_res();
}
else {
dst_udp_mc_logdbg("Valid netdev value not found");
}
}
else {
m_b_is_offloaded = false;
dst_udp_mc_logdbg("Netdev is not offloaded fallback to OS");
}
}
else {
ret_val = dst_entry::resolve_net_dev();
}
return ret_val;
}
bool dst_entry::update_net_dev_val()
{
bool ret_val = false;
if (m_p_rt_entry && (m_p_net_dev_val != m_p_rt_entry->get_net_dev_val())) {
dst_logdbg("updating net_device");
// Change the net_device, clean old resources...
release_ring();
// Save the new net_device
m_p_net_dev_val = m_p_rt_entry->get_net_dev_val();
if (m_p_net_dev_val) {
// more resource clean and alloc...
ret_val = alloc_transport_dep_res();
}
else {
dst_logdbg("Netdev is not offloaded fallback to OS");
}
}
else {
if (m_p_net_dev_val) {
// Only if we already had a valid net_device_val which did not change
dst_logdbg("no change in net_device");
ret_val = true;
}
else {
dst_logdbg("Netdev is not offloaded fallback to OS");
}
}
return ret_val;
}
bool dst_entry::update_net_dev_val()
{
bool ret_val = false;
net_device_val* new_nd_val = m_p_net_dev_val;
if (m_so_bindtodevice_ip && g_p_net_device_table_mgr) {
new_nd_val = g_p_net_device_table_mgr->get_net_device_val(m_so_bindtodevice_ip);
// TODO should we register to g_p_net_device_table_mgr with m_p_net_dev_entry?
// what should we do with an old one?
dst_logdbg("getting net_dev_val by bindtodevice ip");
} else if (m_p_rt_entry) {
new_nd_val = m_p_rt_entry->get_net_dev_val();
}
if (m_p_net_dev_val != new_nd_val) {
dst_logdbg("updating net_device");
if (m_p_neigh_entry) {
g_p_neigh_table_mgr->unregister_observer(neigh_key(m_dst_ip, m_p_net_dev_val),this);
m_p_neigh_entry = NULL;
}
// Change the net_device, clean old resources...
release_ring();
// Save the new net_device
m_p_net_dev_val = new_nd_val;
if (m_p_net_dev_val) {
// more resource clean and alloc...
ret_val = alloc_transport_dep_res();
}
else {
dst_logdbg("Netdev is not offloaded fallback to OS");
}
}
else {
if (m_p_net_dev_val) {
// Only if we already had a valid net_device_val which did not change
dst_logdbg("no change in net_device");
ret_val = true;
}
else {
dst_logdbg("Netdev is not offloaded fallback to OS");
}
}
return ret_val;
}
