+static ip_interface_address_t *
+nat44_ed_get_ip_interface_address (u32 sw_if_index, ip4_address_t addr)
+{
+ snat_main_t *sm = &snat_main;
+
+ ip_lookup_main_t *lm = &sm->ip4_main->lookup_main;
+ ip_interface_address_t *ia;
+ ip4_address_t *ip4a;
+
+ foreach_ip_interface_address (
+ lm, ia, sw_if_index, 1, ({
+ ip4a = ip_interface_address_get_address (lm, ia);
+ nat_log_debug ("sw_if_idx: %u addr: %U ? %U", sw_if_index,
+ format_ip4_address, ip4a, format_ip4_address, &addr);
+ if (ip4a->as_u32 == addr.as_u32)
+ {
+ return ia;
+ }
+ }));
+ return NULL;
+}
+
+static int
+nat44_ed_resolve_nat_addr_len (snat_address_t *ap,
+ snat_interface_t *interfaces)
+{
+ ip_interface_address_t *ia;
+ snat_interface_t *i;
+ u32 fib_index;
+
+ pool_foreach (i, interfaces)
+ {
+ if (!nat44_ed_is_interface_outside (i))
+ {
+ continue;
+ }
+
+ fib_index = ip4_fib_table_get_index_for_sw_if_index (i->sw_if_index);
+ if (fib_index != ap->fib_index)
+ {
+ continue;
+ }
+
+ if ((ia = nat44_ed_get_ip_interface_address (i->sw_if_index, ap->addr)))
+ {
+ ap->addr_len = ia->address_length;
+ ap->sw_if_index = i->sw_if_index;
+ ap->net.as_u32 = (ap->addr.as_u32 >> (32 - ap->addr_len))
+ << (32 - ap->addr_len);
+
+ nat_log_debug ("pool addr %U binds to -> sw_if_idx: %u net: %U/%u",
+ format_ip4_address, &ap->addr, ap->sw_if_index,
+ format_ip4_address, &ap->net, ap->addr_len);
+ return 0;
+ }
+ }
+ return 1;
+}
+
+static void
+nat44_ed_update_outside_if_addresses (snat_address_t *ap)
+{
+ snat_main_t *sm = &snat_main;
+
+ if (!nat44_ed_resolve_nat_addr_len (ap, sm->interfaces))
+ {
+ return;
+ }
+
+ if (!nat44_ed_resolve_nat_addr_len (ap, sm->output_feature_interfaces))
+ {
+ return;
+ }
+}
+
+static void
+nat44_ed_bind_if_addr_to_nat_addr (u32 sw_if_index)
+{
+ snat_main_t *sm = &snat_main;
+ ip_interface_address_t *ia;
+ snat_address_t *ap;
+
+ u32 fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
+
+ vec_foreach (ap, sm->addresses)
+ {
+ if (fib_index != ap->fib_index)
+ {
+ continue;
+ }
+
+ if ((ia = nat44_ed_get_ip_interface_address (sw_if_index, ap->addr)))
+ {
+ ap->addr_len = ia->address_length;
+ ap->sw_if_index = sw_if_index;
+ ap->net.as_u32 = (ap->addr.as_u32 >> (32 - ap->addr_len))
+ << (32 - ap->addr_len);
+
+ nat_log_debug ("pool addr %U binds to -> sw_if_idx: %u net: %U/%u",
+ format_ip4_address, &ap->addr, ap->sw_if_index,
+ format_ip4_address, &ap->net, ap->addr_len);
+ return;
+ }
+ }
+}
+