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-rw-r--r--src/plugins/nat/nat44-ed/nat44_ed.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/src/plugins/nat/nat44-ed/nat44_ed.c b/src/plugins/nat/nat44-ed/nat44_ed.c
index 2ccd461d271..74359ccf8ee 100644
--- a/src/plugins/nat/nat44-ed/nat44_ed.c
+++ b/src/plugins/nat/nat44-ed/nat44_ed.c
@@ -4104,7 +4104,49 @@ nat_syslog_nat44_sdel (u32 ssubix, u32 sfibix, ip4_address_t *isaddr,
idaddr, idport, xdaddr, xdport, proto, 0,
is_twicenat);
}
+__clib_export void
+nat44_original_dst_lookup (ip4_address_t *i2o_src, u16 i2o_src_port,
+ ip4_address_t *i2o_dst, u16 i2o_dst_port,
+ ip_protocol_t proto, u32 *original_dst,
+ u16 *original_dst_port)
+{
+ snat_main_per_thread_data_t *tsm;
+ snat_main_t *sm = &snat_main;
+ u32 fib_index = 0;
+ snat_session_t *s;
+ ip4_header_t ip;
+
+ ip.src_address.as_u32 = i2o_src->as_u32;
+ fib_index = fib_table_find (FIB_PROTOCOL_IP4, 0);
+ if (sm->num_workers > 1)
+ {
+ tsm = vec_elt_at_index (
+ sm->per_thread_data,
+ nat44_ed_get_in2out_worker_index (0, &ip, fib_index, 0));
+ }
+ else
+ {
+ tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
+ }
+
+ /* query */
+ clib_bihash_kv_16_8_t kv = { 0 }, value;
+ init_ed_k (&kv, i2o_src->as_u32, i2o_src_port, i2o_dst->as_u32, i2o_dst_port,
+ fib_index, proto);
+ if (tsm->sessions == NULL ||
+ clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
+ {
+ return;
+ }
+ s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&value));
+ if (s)
+ {
+ *original_dst = s->i2o.rewrite.saddr.as_u32;
+ *original_dst_port = s->i2o.rewrite.sport;
+ }
+ return;
+}
/*
* fd.io coding-style-patch-verification: ON
*