nat: Final NAT44 EI/ED split patch

This patch achieves complete separation of
endpoint-dependent and endpoint-independent IPv4 NAT
features. Some common stuff is also moved to NAT
library.

Type: refactor

Change-Id: I52468b7e2b5ac28958a2baf8e2ea01787322e801
Signed-off-by: Filip Varga <fivarga@cisco.com>

1 files changed, 277 insertions, 0 deletions

diff --git a/src/plugins/nat/nat44-ed/nat44_ed_format.c b/src/plugins/nat/nat44-ed/nat44_ed_format.c
new file mode 100644
index 00000000000..29fd1129f32
--- /dev/null
+++ b/src/plugins/nat/nat44-ed/nat44_ed_format.c
@@ -0,0 +1,277 @@
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * @file
+ * @brief NAT formatting
+ */
+
+#include <nat/nat44-ed/nat44_ed.h>
+#include <nat/nat44-ed/nat44_ed_inlines.h>
+
+uword
+unformat_nat_protocol (unformat_input_t * input, va_list * args)
+{
+  u32 *r = va_arg (*args, u32 *);
+
+  if (0);
+#define _(N, i, n, s) else if (unformat (input, s)) *r = NAT_PROTOCOL_##N;
+  foreach_nat_protocol
+#undef _
+    else
+    return 0;
+  return 1;
+}
+
+u8 *
+format_nat_protocol (u8 * s, va_list * args)
+{
+  u32 i = va_arg (*args, u32);
+  u8 *t = 0;
+
+  switch (i)
+    {
+#define _(N, j, n, str) case NAT_PROTOCOL_##N: t = (u8 *) str; break;
+      foreach_nat_protocol
+#undef _
+    default:
+      s = format (s, "unknown");
+      return s;
+    }
+  s = format (s, "%s", t);
+  return s;
+}
+
+u8 *
+format_nat_addr_and_port_alloc_alg (u8 * s, va_list * args)
+{
+  u32 i = va_arg (*args, u32);
+  u8 *t = 0;
+
+  switch (i)
+    {
+#define _(v, N, s) case NAT_ADDR_AND_PORT_ALLOC_ALG_##N: t = (u8 *) s; break;
+      foreach_nat_addr_and_port_alloc_alg
+#undef _
+    default:
+      s = format (s, "unknown");
+      return s;
+    }
+  s = format (s, "%s", t);
+  return s;
+}
+
+u8 *
+format_snat_key (u8 * s, va_list * args)
+{
+  u64 key = va_arg (*args, u64);
+
+  ip4_address_t addr;
+  u16 port;
+  nat_protocol_t protocol;
+  u32 fib_index;
+
+  split_nat_key (key, &addr, &port, &fib_index, &protocol);
+
+  s = format (s, "%U proto %U port %d fib %d",
+	      format_ip4_address, &addr,
+	      format_nat_protocol, protocol,
+	      clib_net_to_host_u16 (port), fib_index);
+  return s;
+}
+
+u8 *
+format_snat_session_state (u8 * s, va_list * args)
+{
+  u32 i = va_arg (*args, u32);
+  u8 *t = 0;
+
+  switch (i)
+    {
+#define _(v, N, str) case SNAT_SESSION_##N: t = (u8 *) str; break;
+      foreach_snat_session_state
+#undef _
+    default:
+      t = format (t, "unknown");
+    }
+  s = format (s, "%s", t);
+  return s;
+}
+
+u8 *
+format_snat_session (u8 * s, va_list * args)
+{
+  snat_main_per_thread_data_t *tsm =
+    va_arg (*args, snat_main_per_thread_data_t *);
+  snat_session_t *sess = va_arg (*args, snat_session_t *);
+
+  if (snat_is_unk_proto_session (sess))
+    {
+      s = format (s, "  i2o %U proto %u fib %u\n",
+		  format_ip4_address, &sess->in2out.addr,
+		  sess->in2out.port, sess->in2out.fib_index);
+      s =
+	format (s, "    o2i %U proto %u fib %u\n", format_ip4_address,
+		&sess->out2in.addr, sess->out2in.port, sess->out2in.fib_index);
+    }
+  else
+    {
+      s = format (s, "  i2o %U proto %U port %d fib %d\n",
+		  format_ip4_address, &sess->in2out.addr,
+		  format_nat_protocol, sess->nat_proto,
+		  clib_net_to_host_u16 (sess->in2out.port),
+		  sess->in2out.fib_index);
+      s = format (s, "    o2i %U proto %U port %d fib %d\n",
+		  format_ip4_address, &sess->out2in.addr, format_nat_protocol,
+		  sess->nat_proto, clib_net_to_host_u16 (sess->out2in.port),
+		  sess->out2in.fib_index);
+    }
+  if (is_ed_session (sess) || is_fwd_bypass_session (sess))
+    {
+      if (is_twice_nat_session (sess))
+	{
+	  s = format (s, "       external host o2i %U:%d i2o %U:%d\n",
+		      format_ip4_address, &sess->ext_host_addr,
+		      clib_net_to_host_u16 (sess->ext_host_port),
+		      format_ip4_address, &sess->ext_host_nat_addr,
+		      clib_net_to_host_u16 (sess->ext_host_nat_port));
+	}
+      else
+	{
+	  if (sess->ext_host_addr.as_u32)
+	    s = format (s, "       external host %U:%u\n",
+			format_ip4_address, &sess->ext_host_addr,
+			clib_net_to_host_u16 (sess->ext_host_port));
+	}
+      s = format (s, "       i2o flow: %U\n", format_nat_6t_flow, &sess->i2o);
+      s = format (s, "       o2i flow: %U\n", format_nat_6t_flow, &sess->o2i);
+    }
+  s = format (s, "       index %llu\n", sess - tsm->sessions);
+  s = format (s, "       last heard %.2f\n", sess->last_heard);
+  s = format (s, "       total pkts %d, total bytes %lld\n",
+	      sess->total_pkts, sess->total_bytes);
+  if (snat_is_session_static (sess))
+    s = format (s, "       static translation\n");
+  else
+    s = format (s, "       dynamic translation\n");
+  if (is_fwd_bypass_session (sess))
+    s = format (s, "       forwarding-bypass\n");
+  if (is_lb_session (sess))
+    s = format (s, "       load-balancing\n");
+  if (is_twice_nat_session (sess))
+    s = format (s, "       twice-nat\n");
+  return s;
+}
+
+u8 *
+format_snat_static_mapping (u8 * s, va_list * args)
+{
+  snat_static_mapping_t *m = va_arg (*args, snat_static_mapping_t *);
+  nat44_lb_addr_port_t *local;
+
+  if (is_identity_static_mapping (m))
+    {
+      if (is_addr_only_static_mapping (m))
+	s = format (s, "identity mapping %U",
+		    format_ip4_address, &m->local_addr);
+      else
+	s = format (s, "identity mapping %U %U:%d",
+		    format_nat_protocol, m->proto,
+		    format_ip4_address, &m->local_addr,
+		    clib_net_to_host_u16 (m->local_port));
+
+      /* *INDENT-OFF* */
+      pool_foreach (local, m->locals)
+       {
+        s = format (s, " vrf %d", local->vrf_id);
+      }
+      /* *INDENT-ON* */
+
+      return s;
+    }
+
+  if (is_addr_only_static_mapping (m))
+    s = format (s, "local %U external %U vrf %d %s %s",
+		format_ip4_address, &m->local_addr,
+		format_ip4_address, &m->external_addr,
+		m->vrf_id,
+		m->twice_nat == TWICE_NAT ? "twice-nat" :
+		m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
+		is_out2in_only_static_mapping (m) ? "out2in-only" : "");
+  else
+    {
+      if (is_lb_static_mapping (m))
+	{
+	  s = format (s, "%U external %U:%d %s %s",
+		      format_nat_protocol, m->proto,
+		      format_ip4_address, &m->external_addr,
+		      clib_net_to_host_u16 (m->external_port),
+		      m->twice_nat == TWICE_NAT ? "twice-nat" :
+		      m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
+		      is_out2in_only_static_mapping (m) ? "out2in-only" : "");
+
+          /* *INDENT-OFF* */
+          pool_foreach (local, m->locals)
+           {
+	    s = format (s, "\n  local %U:%d vrf %d probability %d\%",
+			format_ip4_address, &local->addr,
+                        clib_net_to_host_u16 (local->port),
+			local->vrf_id, local->probability);
+          }
+          /* *INDENT-ON* */
+
+	}
+      else
+	s = format (s, "%U local %U:%d external %U:%d vrf %d %s %s",
+		    format_nat_protocol, m->proto,
+		    format_ip4_address, &m->local_addr,
+		    clib_net_to_host_u16 (m->local_port),
+		    format_ip4_address, &m->external_addr,
+		    clib_net_to_host_u16 (m->external_port),
+		    m->vrf_id,
+		    m->twice_nat == TWICE_NAT ? "twice-nat" :
+		    m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
+		    is_out2in_only_static_mapping (m) ? "out2in-only" : "");
+    }
+  return s;
+}
+
+u8 *
+format_snat_static_map_to_resolve (u8 * s, va_list * args)
+{
+  snat_static_map_resolve_t *m = va_arg (*args, snat_static_map_resolve_t *);
+  vnet_main_t *vnm = vnet_get_main ();
+
+  if (m->addr_only)
+    s = format (s, "local %U external %U vrf %d",
+		format_ip4_address, &m->l_addr,
+		format_vnet_sw_if_index_name, vnm, m->sw_if_index, m->vrf_id);
+  else
+    s = format (s, "%U local %U:%d external %U:%d vrf %d",
+		format_nat_protocol, m->proto,
+		format_ip4_address, &m->l_addr,
+		clib_net_to_host_u16 (m->l_port),
+		format_vnet_sw_if_index_name, vnm, m->sw_if_index,
+		clib_net_to_host_u16 (m->e_port), m->vrf_id);
+
+  return s;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */