nat: static mappings in flow hash
[vpp.git] / src / plugins / nat / nat44-ed / nat44_ed_in2out.c
index 0e330e1..73dacce 100644 (file)
 #include <vnet/udp/udp_local.h>
 #include <vppinfra/error.h>
 
-#include <nat/lib/nat_syslog.h>
 #include <nat/lib/nat_inlines.h>
 #include <nat/lib/ipfix_logging.h>
 
 #include <nat/nat44-ed/nat44_ed.h>
 #include <nat/nat44-ed/nat44_ed_inlines.h>
 
-/* number of attempts to get a port for ED overloading algorithm, if rolling
- * a dice this many times doesn't produce a free port, it's treated
- * as if there were no free ports available to conserve resources */
-#define ED_PORT_ALLOC_ATTEMPTS (10)
-
 static char *nat_in2out_ed_error_strings[] = {
 #define _(sym,string) string,
   foreach_nat_in2out_ed_error
@@ -166,7 +160,7 @@ snat_not_translate_fast (snat_main_t *sm, vlib_node_runtime_t *node,
 
 static int
 nat_ed_alloc_addr_and_port_with_snat_address (
-  snat_main_t *sm, u32 nat_proto, u32 thread_index, snat_address_t *a,
+  snat_main_t *sm, uproto, u32 thread_index, snat_address_t *a,
   u16 port_per_thread, u32 snat_thread_index, snat_session_t *s,
   ip4_address_t *outside_addr, u16 *outside_port)
 {
@@ -187,27 +181,13 @@ nat_ed_alloc_addr_and_port_with_snat_address (
   u16 attempts = ED_PORT_ALLOC_ATTEMPTS;
   do
     {
-      if (NAT_PROTOCOL_ICMP == nat_proto)
+      if (IP_PROTOCOL_ICMP == proto)
        {
          s->o2i.match.sport = clib_host_to_net_u16 (port);
        }
       s->o2i.match.dport = clib_host_to_net_u16 (port);
       if (0 == nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 2))
        {
-#define _(N, i, n, s)                                                         \
-  case NAT_PROTOCOL_##N:                                                      \
-    ++a->busy_##n##_port_refcounts[port];                                     \
-    a->busy_##n##_ports_per_thread[thread_index]++;                           \
-    a->busy_##n##_ports++;                                                    \
-    break;
-         switch (nat_proto)
-           {
-             foreach_nat_protocol;
-           default:
-             nat_elog_info (sm, "unknown protocol");
-             return 1;
-           }
-#undef _
          *outside_addr = a->addr;
          *outside_port = clib_host_to_net_u16 (port);
          return 0;
@@ -223,9 +203,8 @@ nat_ed_alloc_addr_and_port_with_snat_address (
 static int
 nat_ed_alloc_addr_and_port (snat_main_t *sm, u32 rx_fib_index, u32 nat_proto,
                            u32 thread_index, ip4_address_t s_addr,
-                           u16 port_per_thread, u32 snat_thread_index,
-                           snat_session_t *s, ip4_address_t *outside_addr,
-                           u16 *outside_port)
+                           u32 snat_thread_index, snat_session_t *s,
+                           ip4_address_t *outside_addr, u16 *outside_port)
 {
   int i;
   snat_address_t *a, *ga = 0;
@@ -240,7 +219,7 @@ nat_ed_alloc_addr_and_port (snat_main_t *sm, u32 rx_fib_index, u32 nat_proto,
          if (a->fib_index == rx_fib_index)
            {
              return nat_ed_alloc_addr_and_port_with_snat_address (
-               sm, nat_proto, thread_index, a, port_per_thread,
+               sm, nat_proto, thread_index, a, sm->port_per_thread,
                snat_thread_index, s, outside_addr, outside_port);
            }
          else if (a->fib_index == ~0)
@@ -255,7 +234,7 @@ nat_ed_alloc_addr_and_port (snat_main_t *sm, u32 rx_fib_index, u32 nat_proto,
          if (a->fib_index == rx_fib_index)
            {
              return nat_ed_alloc_addr_and_port_with_snat_address (
-               sm, nat_proto, thread_index, a, port_per_thread,
+               sm, nat_proto, thread_index, a, sm->port_per_thread,
                snat_thread_index, s, outside_addr, outside_port);
            }
          else if (a->fib_index == ~0)
@@ -267,8 +246,8 @@ nat_ed_alloc_addr_and_port (snat_main_t *sm, u32 rx_fib_index, u32 nat_proto,
       if (ga)
        {
          return nat_ed_alloc_addr_and_port_with_snat_address (
-           sm, nat_proto, thread_index, a, port_per_thread, snat_thread_index,
-           s, outside_addr, outside_port);
+           sm, nat_proto, thread_index, a, sm->port_per_thread,
+           snat_thread_index, s, outside_addr, outside_port);
        }
     }
   /* Totally out of translations to use... */
@@ -304,23 +283,18 @@ nat_outside_fib_index_lookup (snat_main_t * sm, ip4_address_t addr)
 
 static_always_inline int
 nat44_ed_external_sm_lookup (snat_main_t *sm, ip4_address_t match_addr,
-                            u16 match_port, nat_protocol_t match_protocol,
-                            u32 match_fib_index, ip4_address_t *daddr,
-                            u16 *dport)
+                            u16 match_port, ip_protocol_t match_protocol,
+                            ip4_address_t *daddr, u16 *dport)
 {
-  clib_bihash_kv_8_8_t kv, value;
-  init_nat_k (&kv, match_addr, match_port, match_fib_index, match_protocol);
-  if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
+  snat_static_mapping_t *m =
+    nat44_ed_sm_o2i_lookup (sm, match_addr, match_port, 0, match_protocol);
+  if (!m)
     {
       /* Try address only mapping */
-      init_nat_k (&kv, match_addr, 0, 0, 0);
-      if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv,
-                                 &value))
+      m = nat44_ed_sm_o2i_lookup (sm, match_addr, 0, 0, 0);
+      if (!m)
        return 0;
     }
-
-  snat_static_mapping_t *m =
-    pool_elt_at_index (sm->static_mappings, value.value);
   *daddr = m->local_addr;
   if (dport)
     {
@@ -343,7 +317,6 @@ slow_path_ed (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b,
   u32 outside_fib_index;
   u8 is_identity_nat = 0;
 
-  u32 nat_proto = ip_proto_to_nat_proto (proto);
   snat_session_t *s = NULL;
   lb_nat_type_t lb = 0;
   ip4_address_t daddr = r_addr;
@@ -382,9 +355,9 @@ slow_path_ed (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b,
   u32 sm_fib_index;
   /* First try to match static mapping by local address and port */
   int is_sm;
-  if (snat_static_mapping_match (vm, sm, l_addr, l_port, rx_fib_index,
-                                nat_proto, &sm_addr, &sm_port, &sm_fib_index,
-                                0, 0, 0, &lb, 0, &is_identity_nat, 0))
+  if (snat_static_mapping_match (vm, sm, l_addr, l_port, rx_fib_index, proto,
+                                &sm_addr, &sm_port, &sm_fib_index, 0, 0, 0,
+                                &lb, 0, &is_identity_nat, 0))
     {
       is_sm = 0;
     }
@@ -398,7 +371,7 @@ slow_path_ed (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b,
       is_sm = 1;
     }
 
-  if (PREDICT_TRUE (nat_proto == NAT_PROTOCOL_TCP))
+  if (PREDICT_TRUE (proto == IP_PROTOCOL_TCP))
     {
       if (PREDICT_FALSE (!tcp_flags_is_init (
            vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
@@ -415,7 +388,7 @@ slow_path_ed (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b,
     {
       s->in2out.addr = l_addr;
       s->in2out.port = l_port;
-      s->nat_proto = nat_proto;
+      s->proto = proto;
       s->in2out.fib_index = rx_fib_index;
       s->out2in.fib_index = outside_fib_index;
 
@@ -423,8 +396,8 @@ slow_path_ed (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b,
       outside_port = l_port;
 
       // hairpinning?
-      int is_hairpinning = nat44_ed_external_sm_lookup (
-       sm, r_addr, r_port, nat_proto, outside_fib_index, &daddr, &dport);
+      int is_hairpinning = nat44_ed_external_sm_lookup (sm, r_addr, r_port,
+                                                       proto, &daddr, &dport);
       s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING;
 
       // destination addr/port updated with real values in
@@ -432,7 +405,7 @@ slow_path_ed (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b,
       nat_6t_o2i_flow_init (sm, thread_index, s, daddr, dport, daddr, 0,
                            s->out2in.fib_index, proto);
       nat_6t_flow_daddr_rewrite_set (&s->o2i, l_addr.as_u32);
-      if (NAT_PROTOCOL_ICMP == nat_proto)
+      if (IP_PROTOCOL_ICMP == proto)
        {
          nat_6t_flow_icmp_id_rewrite_set (&s->o2i, l_port);
        }
@@ -442,10 +415,9 @@ slow_path_ed (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b,
        }
       nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index);
 
-      if (nat_ed_alloc_addr_and_port (
-           sm, rx_fib_index, nat_proto, thread_index, l_addr,
-           sm->port_per_thread, tsm->snat_thread_index, s, &outside_addr,
-           &outside_port))
+      if (nat_ed_alloc_addr_and_port (sm, rx_fib_index, proto, thread_index,
+                                     l_addr, tsm->snat_thread_index, s,
+                                     &outside_addr, &outside_port))
        {
          nat_elog_notice (sm, "addresses exhausted");
          b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS];
@@ -462,17 +434,17 @@ slow_path_ed (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b,
       s->out2in.port = outside_port = sm_port;
       s->in2out.addr = l_addr;
       s->in2out.port = l_port;
-      s->nat_proto = nat_proto;
+      s->proto = proto;
       s->in2out.fib_index = rx_fib_index;
       s->out2in.fib_index = outside_fib_index;
       s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
 
       // hairpinning?
-      int is_hairpinning = nat44_ed_external_sm_lookup (
-       sm, r_addr, r_port, nat_proto, outside_fib_index, &daddr, &dport);
+      int is_hairpinning = nat44_ed_external_sm_lookup (sm, r_addr, r_port,
+                                                       proto, &daddr, &dport);
       s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING;
 
-      if (NAT_PROTOCOL_ICMP == nat_proto)
+      if (IP_PROTOCOL_ICMP == proto)
        {
          nat_6t_o2i_flow_init (sm, thread_index, s, daddr, sm_port, sm_addr,
                                sm_port, s->out2in.fib_index, proto);
@@ -503,7 +475,7 @@ slow_path_ed (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b,
   nat_6t_flow_saddr_rewrite_set (&s->i2o, outside_addr.as_u32);
   nat_6t_flow_daddr_rewrite_set (&s->i2o, daddr.as_u32);
 
-  if (NAT_PROTOCOL_ICMP == nat_proto)
+  if (IP_PROTOCOL_ICMP == proto)
     {
       nat_6t_flow_icmp_id_rewrite_set (&s->i2o, outside_port);
     }
@@ -521,17 +493,14 @@ slow_path_ed (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b,
     }
 
   /* log NAT event */
-  nat_ipfix_logging_nat44_ses_create (thread_index,
-                                     s->in2out.addr.as_u32,
-                                     s->out2in.addr.as_u32,
-                                     s->nat_proto,
-                                     s->in2out.port,
-                                     s->out2in.port, s->in2out.fib_index);
+  nat_ipfix_logging_nat44_ses_create (
+    thread_index, s->in2out.addr.as_u32, s->out2in.addr.as_u32, s->proto,
+    s->in2out.port, s->out2in.port, s->in2out.fib_index);
 
   nat_syslog_nat44_sadd (0, s->in2out.fib_index, &s->in2out.addr,
                         s->in2out.port, &s->ext_host_nat_addr,
                         s->ext_host_nat_port, &s->out2in.addr, s->out2in.port,
-                        &s->ext_host_addr, s->ext_host_port, s->nat_proto, 0);
+                        &s->ext_host_addr, s->ext_host_port, s->proto, 0);
 
   per_vrf_sessions_register_session (s, thread_index);
 
@@ -540,12 +509,6 @@ slow_path_ed (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b,
 error:
   if (s)
     {
-      if (!is_sm)
-       {
-         snat_free_outside_address_and_port (sm->addresses, thread_index,
-                                             &outside_addr, outside_port,
-                                             nat_proto);
-       }
       nat_ed_session_delete (sm, s, thread_index, 1);
     }
   *sessionp = s = NULL;
@@ -560,9 +523,10 @@ nat44_ed_not_translate (vlib_main_t *vm, snat_main_t *sm,
 {
   clib_bihash_kv_16_8_t kv, value;
 
-  init_ed_k (&kv, ip->dst_address, vnet_buffer (b)->ip.reass.l4_dst_port,
-            ip->src_address, vnet_buffer (b)->ip.reass.l4_src_port,
-            sm->outside_fib_index, ip->protocol);
+  init_ed_k (&kv, ip->dst_address.as_u32,
+            vnet_buffer (b)->ip.reass.l4_dst_port, ip->src_address.as_u32,
+            vnet_buffer (b)->ip.reass.l4_src_port, sm->outside_fib_index,
+            ip->protocol);
 
   /* NAT packet aimed at external address if has active sessions */
   if (clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
@@ -607,18 +571,18 @@ nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip,
                                              &lookup_sport, &lookup_daddr,
                                              &lookup_dport, &lookup_protocol))
        return 0;
-      init_ed_k (&kv, lookup_saddr, lookup_sport, lookup_daddr, lookup_dport,
-                0, lookup_protocol);
+      init_ed_k (&kv, lookup_saddr.as_u32, lookup_sport, lookup_daddr.as_u32,
+                lookup_dport, 0, lookup_protocol);
     }
   else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
     {
-      init_ed_k (&kv, ip->src_address, vnet_buffer (b)->ip.reass.l4_src_port,
-                ip->dst_address, vnet_buffer (b)->ip.reass.l4_dst_port, 0,
-                ip->protocol);
+      init_ed_k (&kv, ip->src_address.as_u32,
+                vnet_buffer (b)->ip.reass.l4_src_port, ip->dst_address.as_u32,
+                vnet_buffer (b)->ip.reass.l4_dst_port, 0, ip->protocol);
     }
   else
     {
-      init_ed_k (&kv, ip->src_address, 0, ip->dst_address, 0, 0,
+      init_ed_k (&kv, ip->src_address.as_u32, 0, ip->dst_address.as_u32, 0, 0,
                 ip->protocol);
     }
 
@@ -665,8 +629,8 @@ nat44_ed_not_translate_output_feature (snat_main_t *sm, vlib_buffer_t *b,
   u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index);
 
   /* src NAT check */
-  init_ed_k (&kv, ip->src_address, src_port, ip->dst_address, dst_port,
-            tx_fib_index, ip->protocol);
+  init_ed_k (&kv, ip->src_address.as_u32, src_port, ip->dst_address.as_u32,
+            dst_port, tx_fib_index, ip->protocol);
   if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
     {
       ASSERT (thread_index == ed_value_get_thread_index (&value));
@@ -676,7 +640,7 @@ nat44_ed_not_translate_output_feature (snat_main_t *sm, vlib_buffer_t *b,
       if (nat44_is_ses_closed (s)
          && (!s->tcp_closed_timestamp || now >= s->tcp_closed_timestamp))
        {
-         nat_free_session_data (sm, s, thread_index, 0);
+         nat44_ed_free_session_data (sm, s, thread_index, 0);
          nat_ed_session_delete (sm, s, thread_index, 1);
        }
       return 1;
@@ -703,8 +667,8 @@ nat44_ed_not_translate_output_feature (snat_main_t *sm, vlib_buffer_t *b,
       s = NULL;
     }
 
-  init_ed_k (&kv, ip->dst_address, dst_port, ip->src_address, src_port,
-            rx_fib_index, ip->protocol);
+  init_ed_k (&kv, ip->dst_address.as_u32, dst_port, ip->src_address.as_u32,
+            src_port, rx_fib_index, ip->protocol);
   if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
     {
       ASSERT (thread_index == ed_value_get_thread_index (&value));
@@ -764,9 +728,8 @@ icmp_in2out_ed_slow_path (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip,
     }
   else
     {
-      if (PREDICT_FALSE (nat44_ed_not_translate (vm, sm, node, sw_if_index, b,
-                                                ip, NAT_PROTOCOL_ICMP,
-                                                rx_fib_index)))
+      if (PREDICT_FALSE (nat44_ed_not_translate (
+           vm, sm, node, sw_if_index, b, ip, IP_PROTOCOL_ICMP, rx_fib_index)))
        {
          return next;
        }
@@ -819,7 +782,6 @@ nat44_ed_in2out_slowpath_unknown_proto (snat_main_t *sm, vlib_buffer_t *b,
                                        vlib_main_t *vm,
                                        vlib_node_runtime_t *node)
 {
-  clib_bihash_kv_8_8_t kv, value;
   clib_bihash_kv_16_8_t s_kv, s_value;
   snat_static_mapping_t *m = NULL;
   snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
@@ -852,12 +814,11 @@ nat44_ed_in2out_slowpath_unknown_proto (snat_main_t *sm, vlib_buffer_t *b,
       break;
     }
 
-  init_nat_k (&kv, ip->src_address, 0, rx_fib_index, 0);
-
   /* Try to find static mapping first */
-  if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
+  m = nat44_ed_sm_i2o_lookup (sm, ip->src_address, 0, rx_fib_index,
+                             ip->protocol);
+  if (m)
     {
-      m = pool_elt_at_index (sm->static_mappings, value.value);
       new_src_addr = m->external_addr;
     }
   else
@@ -866,8 +827,9 @@ nat44_ed_in2out_slowpath_unknown_proto (snat_main_t *sm, vlib_buffer_t *b,
        {
          if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
            {
-             init_ed_k (&s_kv, s->out2in.addr, 0, ip->dst_address, 0,
-                        outside_fib_index, ip->protocol);
+             init_ed_k (&s_kv, s->out2in.addr.as_u32, 0,
+                        ip->dst_address.as_u32, 0, outside_fib_index,
+                        ip->protocol);
              if (clib_bihash_search_16_8 (&sm->flow_hash, &s_kv, &s_value))
                {
                  new_src_addr = s->out2in.addr;
@@ -880,8 +842,9 @@ nat44_ed_in2out_slowpath_unknown_proto (snat_main_t *sm, vlib_buffer_t *b,
        {
          for (i = 0; i < vec_len (sm->addresses); i++)
            {
-             init_ed_k (&s_kv, sm->addresses[i].addr, 0, ip->dst_address, 0,
-                        outside_fib_index, ip->protocol);
+             init_ed_k (&s_kv, sm->addresses[i].addr.as_u32, 0,
+                        ip->dst_address.as_u32, 0, outside_fib_index,
+                        ip->protocol);
              if (clib_bihash_search_16_8 (&sm->flow_hash, &s_kv, &s_value))
                {
                  new_src_addr = sm->addresses[i].addr;
@@ -910,9 +873,8 @@ nat44_ed_in2out_slowpath_unknown_proto (snat_main_t *sm, vlib_buffer_t *b,
   nat_6t_flow_txfib_rewrite_set (&s->i2o, outside_fib_index);
 
   // hairpinning?
-  int is_hairpinning =
-    nat44_ed_external_sm_lookup (sm, ip->dst_address, 0, NAT_PROTOCOL_OTHER,
-                                outside_fib_index, &new_dst_addr, NULL);
+  int is_hairpinning = nat44_ed_external_sm_lookup (
+    sm, ip->dst_address, 0, ip->protocol, &new_dst_addr, NULL);
   s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING;
 
   nat_6t_flow_daddr_rewrite_set (&s->i2o, new_dst_addr.as_u32);
@@ -925,7 +887,6 @@ nat44_ed_in2out_slowpath_unknown_proto (snat_main_t *sm, vlib_buffer_t *b,
   nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index);
 
   s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
-  s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
   s->out2in.addr.as_u32 = new_src_addr.as_u32;
   s->out2in.fib_index = outside_fib_index;
   s->in2out.addr.as_u32 = ip->src_address.as_u32;
@@ -987,7 +948,7 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t *vm,
       u32 rx_sw_if_index0, rx_fib_index0, iph_offset0 = 0;
       u32 tx_sw_if_index0;
       u32 cntr_sw_if_index0;
-      nat_protocol_t proto0;
+      ip_protocol_t proto0;
       ip4_header_t *ip0;
       snat_session_t *s0 = 0;
       clib_bihash_kv_16_8_t kv0, value0;
@@ -1039,7 +1000,7 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t *vm,
          goto trace0;
        }
 
-      proto0 = ip_proto_to_nat_proto (ip0->protocol);
+      proto0 = ip0->protocol;
 
       if (is_output_feature)
        {
@@ -1049,7 +1010,7 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t *vm,
            goto trace0;
        }
 
-      if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+      if (PREDICT_FALSE (proto0 == IP_PROTOCOL_ICMP))
        {
          if (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
                ICMP4_echo_request &&
@@ -1103,8 +1064,8 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t *vm,
          s0 = NULL;
        }
 
-      init_ed_k (&kv0, lookup.saddr, lookup.sport, lookup.daddr, lookup.dport,
-                lookup.fib_index, lookup.proto);
+      init_ed_k (&kv0, lookup.saddr.as_u32, lookup.sport, lookup.daddr.as_u32,
+                lookup.dport, lookup.fib_index, lookup.proto);
 
       // lookup flow
       if (clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0))
@@ -1126,7 +1087,7 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t *vm,
       if (PREDICT_FALSE (per_vrf_sessions_is_expired (s0, thread_index)))
        {
          // session is closed, go slow path
-         nat_free_session_data (sm, s0, thread_index, 0);
+         nat44_ed_free_session_data (sm, s0, thread_index, 0);
          nat_ed_session_delete (sm, s0, thread_index, 1);
          next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
          goto trace0;
@@ -1154,7 +1115,7 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t *vm,
        s0->last_heard + (f64) nat44_session_get_timeout (sm, s0);
       if (now >= sess_timeout_time)
        {
-         nat_free_session_data (sm, s0, thread_index, 0);
+         nat44_ed_free_session_data (sm, s0, thread_index, 0);
          nat_ed_session_delete (sm, s0, thread_index, 1);
          // session is closed, go slow path
          next[0] = def_slow;
@@ -1175,7 +1136,7 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t *vm,
       else
        {
          translation_error = NAT_ED_TRNSL_ERR_FLOW_MISMATCH;
-         nat_free_session_data (sm, s0, thread_index, 0);
+         nat44_ed_free_session_data (sm, s0, thread_index, 0);
          nat_ed_session_delete (sm, s0, thread_index, 1);
          next[0] = NAT_NEXT_DROP;
          b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
@@ -1186,7 +1147,7 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t *vm,
          (translation_error = nat_6t_flow_buf_translate_i2o (
             vm, sm, b0, ip0, f, proto0, is_output_feature)))
        {
-         nat_free_session_data (sm, s0, thread_index, 0);
+         nat44_ed_free_session_data (sm, s0, thread_index, 0);
          nat_ed_session_delete (sm, s0, thread_index, 1);
          next[0] = NAT_NEXT_DROP;
          b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
@@ -1195,20 +1156,20 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t *vm,
 
       switch (proto0)
        {
-       case NAT_PROTOCOL_TCP:
+       case IP_PROTOCOL_TCP:
          vlib_increment_simple_counter (&sm->counters.fastpath.in2out.tcp,
                                         thread_index, cntr_sw_if_index0, 1);
          nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index);
          break;
-       case NAT_PROTOCOL_UDP:
+       case IP_PROTOCOL_UDP:
          vlib_increment_simple_counter (&sm->counters.fastpath.in2out.udp,
                                         thread_index, cntr_sw_if_index0, 1);
          break;
-       case NAT_PROTOCOL_ICMP:
+       case IP_PROTOCOL_ICMP:
          vlib_increment_simple_counter (&sm->counters.fastpath.in2out.icmp,
                                         thread_index, cntr_sw_if_index0, 1);
          break;
-       case NAT_PROTOCOL_OTHER:
+       default:
          vlib_increment_simple_counter (&sm->counters.fastpath.in2out.other,
                                         thread_index, cntr_sw_if_index0, 1);
          break;
@@ -1289,7 +1250,7 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t *vm,
       u32 rx_sw_if_index0, rx_fib_index0, iph_offset0 = 0;
       u32 tx_sw_if_index0;
       u32 cntr_sw_if_index0;
-      nat_protocol_t proto0;
+      ip_protocol_t proto0;
       ip4_header_t *ip0;
       udp_header_t *udp0;
       icmp46_header_t *icmp0;
@@ -1326,9 +1287,9 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t *vm,
 
       udp0 = ip4_next_header (ip0);
       icmp0 = (icmp46_header_t *) udp0;
-      proto0 = ip_proto_to_nat_proto (ip0->protocol);
+      proto0 = ip0->protocol;
 
-      if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
+      if (PREDICT_FALSE (nat44_ed_is_unk_proto (proto0)))
        {
          s0 = nat44_ed_in2out_slowpath_unknown_proto (
            sm, b0, ip0, rx_fib_index0, thread_index, now, vm, node);
@@ -1340,7 +1301,7 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t *vm,
                (translation_error = nat_6t_flow_buf_translate_i2o (
                   vm, sm, b0, ip0, &s0->i2o, proto0, is_output_feature)))
            {
-             nat_free_session_data (sm, s0, thread_index, 0);
+             nat44_ed_free_session_data (sm, s0, thread_index, 0);
              nat_ed_session_delete (sm, s0, thread_index, 1);
              next[0] = NAT_NEXT_DROP;
              b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
@@ -1352,7 +1313,7 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t *vm,
          goto trace0;
        }
 
-      if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+      if (PREDICT_FALSE (proto0 == IP_PROTOCOL_ICMP))
        {
          next[0] = icmp_in2out_ed_slow_path (
            sm, b0, ip0, icmp0, rx_sw_if_index0, rx_fib_index0, node, next[0],
@@ -1362,7 +1323,7 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t *vm,
                (translation_error = nat_6t_flow_buf_translate_i2o (
                   vm, sm, b0, ip0, &s0->i2o, proto0, is_output_feature)))
            {
-             nat_free_session_data (sm, s0, thread_index, 0);
+             nat44_ed_free_session_data (sm, s0, thread_index, 0);
              nat_ed_session_delete (sm, s0, thread_index, 1);
              next[0] = NAT_NEXT_DROP;
              b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
@@ -1374,10 +1335,10 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t *vm,
          goto trace0;
        }
 
-      init_ed_k (&kv0, ip0->src_address,
-                vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address,
-                vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
-                ip0->protocol);
+      init_ed_k (
+       &kv0, ip0->src_address.as_u32, vnet_buffer (b0)->ip.reass.l4_src_port,
+       ip0->dst_address.as_u32, vnet_buffer (b0)->ip.reass.l4_dst_port,
+       rx_fib_index0, ip0->protocol);
       if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0))
        {
          ASSERT (thread_index == ed_value_get_thread_index (&value0));
@@ -1387,7 +1348,7 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t *vm,
 
          if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp)
            {
-             nat_free_session_data (sm, s0, thread_index, 0);
+             nat44_ed_free_session_data (sm, s0, thread_index, 0);
              nat_ed_session_delete (sm, s0, thread_index, 1);
              s0 = NULL;
            }
@@ -1407,11 +1368,11 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t *vm,
               * Send DHCP packets to the ipv4 stack, or we won't
               * be able to use dhcp client on the outside interface
               */
-             if (PREDICT_FALSE
-                 (proto0 == NAT_PROTOCOL_UDP
-                  && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
-                      clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server))
-                  && ip0->dst_address.as_u32 == 0xffffffff))
+             if (PREDICT_FALSE (
+                   proto0 == IP_PROTOCOL_UDP &&
+                   (vnet_buffer (b0)->ip.reass.l4_dst_port ==
+                    clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server)) &&
+                   ip0->dst_address.as_u32 == 0xffffffff))
                goto trace0;
            }
          else
@@ -1442,14 +1403,14 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t *vm,
          (translation_error = nat_6t_flow_buf_translate_i2o (
             vm, sm, b0, ip0, &s0->i2o, proto0, is_output_feature)))
        {
-         nat_free_session_data (sm, s0, thread_index, 0);
+         nat44_ed_free_session_data (sm, s0, thread_index, 0);
          nat_ed_session_delete (sm, s0, thread_index, 1);
          next[0] = NAT_NEXT_DROP;
          b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
          goto trace0;
        }
 
-      if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+      if (PREDICT_TRUE (proto0 == IP_PROTOCOL_TCP))
        {
          vlib_increment_simple_counter (&sm->counters.slowpath.in2out.tcp,
                                         thread_index, cntr_sw_if_index0, 1);