void set_default_output_ifaces()
{
default_out_iface_v4 = get_any_output_iface(AF_INET);
if (default_out_iface_v4 != NULL) {
lispd_log_msg(LISP_LOG_DEBUG_2,"Default IPv4 iface %s\n",default_out_iface_v4->iface_name);
#ifdef ROUTER
set_tun_default_route_v4();
#endif
}
default_out_iface_v6 = get_any_output_iface(AF_INET6);
if (default_out_iface_v6 != NULL) {
lispd_log_msg(LISP_LOG_DEBUG_2,"Default IPv6 iface %s\n",default_out_iface_v6->iface_name);
#ifdef ROUTER
// For IPv6, the route is not updated and should be removed before adding the new one
del_tun_default_route_v6();
set_tun_default_route_v6();
#endif
}
if (!default_out_iface_v4 && !default_out_iface_v6){
lispd_log_msg(LISP_LOG_CRIT,"NO OUTPUT IFACE: all the locators are down");
}
}
void process_address_change (
lispd_iface_elt *iface,
lisp_addr_t new_addr)
{
lisp_addr_t *iface_addr = NULL;
lispd_iface_mappings_list *mapping_list = NULL;
int aux_afi = 0;
// XXX To be modified when full NAT implemented --> When Nat Aware active no IPv6 RLOCs supported
if (nat_aware == TRUE && new_addr.afi == AF_INET6) {
return;
}
/* Check if the addres is a global address*/
if (is_link_local_addr(new_addr) == TRUE) {
lispd_log_msg(LISP_LOG_DEBUG_2,"precess_address_change: the extractet address from the netlink "
"messages is a local link address: %s discarded", get_char_from_lisp_addr_t(new_addr));
return;
}
/* If default RLOC afi defined (-a 4 or 6), only accept addresses of the specified afi */
if (default_rloc_afi != AF_UNSPEC && default_rloc_afi != new_addr.afi) {
lispd_log_msg(LISP_LOG_DEBUG_2,"precess_address_change: Default RLOC afi defined (-a #): Skipped %s address in iface %s",
(new_addr.afi == AF_INET) ? "IPv4" : "IPv6",iface->iface_name);
return;
}
/*
* Actions to be done due to a change of address: SMR
*/
switch (new_addr.afi) {
case AF_INET:
iface_addr = iface->ipv4_address;
break;
case AF_INET6:
iface_addr = iface->ipv6_address;
break;
}
// Same address that we already have
if (compare_lisp_addr_t(iface_addr,&new_addr)==0) {
lispd_log_msg(LISP_LOG_DEBUG_2,"precess_address_change: The detected change of address for interface %s "
"doesn't affect",iface->iface_name);
/* We must rebind the socket just in case the address is from a virtual interface who has changed its interafce number */
switch (new_addr.afi) {
case AF_INET:
bind_socket_src_address(iface->out_socket_v4,&new_addr);
break;
case AF_INET6:
bind_socket_src_address(iface->out_socket_v6,&new_addr);
break;
}
return;
}
/*
* Change source routing rules for this interface and binding
*/
if (iface_addr->afi != AF_UNSPEC) {
del_rule(iface_addr->afi,
0,
iface->iface_index,
iface->iface_index,
RTN_UNICAST,
iface_addr,
(iface_addr->afi == AF_INET) ? 32 : 128,
NULL,0,0);
}
add_rule(new_addr.afi,
0,
iface->iface_index,
iface->iface_index,
RTN_UNICAST,
&new_addr,
(new_addr.afi == AF_INET) ? 32 : 128,
NULL,0,0);
switch (new_addr.afi) {
case AF_INET:
bind_socket_src_address(iface->out_socket_v4,&new_addr);
break;
case AF_INET6:
bind_socket_src_address(iface->out_socket_v6,&new_addr);
break;
}
aux_afi = iface_addr->afi;
// Update the new address
copy_lisp_addr(iface_addr, &new_addr);
/* The interface was down during initial configuratiopn process and now it is up. Activate address */
if (aux_afi == AF_UNSPEC) {
lispd_log_msg(LISP_LOG_DEBUG_1,"process_address_change: Activating the locator address %s"
, get_char_from_lisp_addr_t(new_addr));
activate_interface_address(iface, new_addr);
if (iface->status == UP) {
iface_balancing_vectors_calc(iface);
/*
* If no default control and data interface, recalculate it
*/
if ((default_ctrl_iface_v4 == NULL && new_addr.afi == AF_INET) ||
(default_ctrl_iface_v6 == NULL && new_addr.afi == AF_INET6)) {
lispd_log_msg(LISP_LOG_DEBUG_2,"No default control interface. Recalculate new control interface");
set_default_ctrl_ifaces();
}
if ((default_out_iface_v4 == NULL && new_addr.afi == AF_INET) ||
(default_out_iface_v6 == NULL && new_addr.afi == AF_INET6)) {
lispd_log_msg(LISP_LOG_DEBUG_2,"No default output interface. Recalculate new output interface");
set_default_output_ifaces();
}
}
}
lispd_log_msg(LISP_LOG_DEBUG_1,"precess_address_change: New address detected for interface %s -> %s",
iface->iface_name, get_char_from_lisp_addr_t(new_addr));
mapping_list = iface->head_mappings_list;
/* Sort again the locators list of the affected mappings*/
while (mapping_list != NULL) {
if (aux_afi != AF_UNSPEC && // When the locator is activated, it is automatically sorted
((new_addr.afi == AF_INET && mapping_list->use_ipv4_address == TRUE) ||
(new_addr.afi == AF_INET6 && mapping_list->use_ipv6_address == TRUE))) {
sort_locators_list_elt (mapping_list->mapping, iface_addr);
}
mapping_list = mapping_list->next;
}
/* Indicate change of address in the interface */
switch (new_addr.afi) {
case AF_INET:
iface->ipv4_changed = TRUE;
break;
case AF_INET6:
iface->ipv6_changed = TRUE;
break;
}
/* If it is compiled in router mode, then recompile default routes changing the indicated src address*/
if (router_mode == TRUE) {
switch (new_addr.afi) {
case AF_INET:
if (iface == default_out_iface_v4) {
set_tun_default_route_v4();
}
break;
case AF_INET6:
if (iface == default_out_iface_v6) {
del_tun_default_route_v6();
set_tun_default_route_v6();
}
break;
}
}
/* Check if the new address is behind NAT */
if(nat_aware==TRUE) {
// TODO : To be modified when implementing NAT per multiple interfaces
nat_status = UNKNOWN;
clear_rtr_from_locators (iface);
if (iface->status == UP) {
initial_info_request_process();
} else {
nat_aware_iface_address_change = TRUE;
}
}
/* Reprograming SMR timer*/
if (smr_timer == NULL) {
smr_timer = create_timer (SMR_TIMER);
}
start_timer(smr_timer, LISPD_SMR_TIMEOUT,(timer_callback)init_smr, NULL);
}
