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# Copyright (c) 2015 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.

# Pick up per-platform makefile fragments
$(foreach d,$(SOURCE_PATH_BUILD_DATA_DIRS),	\
  $(eval -include $(d)/platforms/*.mk))
ighlight .ow { color: #f92672 } /* Operator.Word */ .highlight .w { color: #f8f8f2 } /* Text.Whitespace */ .highlight .mb { color: #ae81ff } /* Literal.Number.Bin */ .highlight .mf { color: #ae81ff } /* Literal.Number.Float */ .highlight .mh { color: #ae81ff } /* Literal.Number.Hex */ .highlight .mi { color: #ae81ff } /* Literal.Number.Integer */ .highlight .mo { color: #ae81ff } /* Literal.Number.Oct */ .highlight .sa { color: #e6db74 } /* Literal.String.Affix */ .highlight .sb { color: #e6db74 } /* Literal.String.Backtick */ .highlight .sc { color: #e6db74 } /* Literal.String.Char */ .highlight .dl { color: #e6db74 } /* Literal.String.Delimiter */ .highlight .sd { color: #e6db74 } /* Literal.String.Doc */ .highlight .s2 { color: #e6db74 } /* Literal.String.Double */ .highlight .se { color: #ae81ff } /* Literal.String.Escape */ .highlight .sh { color: #e6db74 } /* Literal.String.Heredoc */ .highlight .si { color: #e6db74 } /* Literal.String.Interpol */ .highlight .sx { color: #e6db74 } /* Literal.String.Other */ .highlight .sr { color: #e6db74 } /* Literal.String.Regex */ .highlight .s1 { color: #e6db74 } /* Literal.String.Single */ .highlight .ss { color: #e6db74 } /* Literal.String.Symbol */ .highlight .bp { color: #f8f8f2 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #a6e22e } /* Name.Function.Magic */ .highlight .vc { color: #f8f8f2 } /* Name.Variable.Class */ .highlight .vg { color: #f8f8f2 } /* Name.Variable.Global */ .highlight .vi { color: #f8f8f2 } /* Name.Variable.Instance */ .highlight .vm { color: #f8f8f2 } /* Name.Variable.Magic */ .highlight .il { color: #ae81ff } /* Literal.Number.Integer.Long */ } @media (prefers-color-scheme: light) { .highlight .hll { background-color: #ffffcc } .highlight .c { color: #888888 } /* Comment */ .highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */ .highlight .k { color: #008800; font-weight: bold } /* Keyword */ .highlight .ch { color: #888888 } /* Comment.Hashbang */ .highlight .cm { color: #888888 } /* Comment.Multiline */ .highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */ .highlight .cpf { color: #888888 } /* Comment.PreprocFile */ .highlight .c1 { color: #888888 } /* Comment.Single */ .highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */ .highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */ .highlight .ge { font-style: italic } /* Generic.Emph */ .highlight .gr { color: #aa0000 } /* Generic.Error */ .highlight .gh { color: #333333 } /* Generic.Heading */ .highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */ .highlight .go { color: #888888 } /* Generic.Output */ .highlight .gp { color: #555555 } /* Generic.Prompt */ .highlight .gs { font-weight: bold } /* Generic.Strong */ .highlight .gu { color: #666666 } /* Generic.Subheading */ .highlight .gt { color: #aa0000 } /* Generic.Traceback */ .highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */ .highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */ .highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */ .highlight .kp { color: #008800 } /* Keyword.Pseudo */ .highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */ .highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */ .highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */ .highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */ .highlight .na { color: #336699 } /* Name.Attribute */ .highlight .nb { color: #003388 } /* Name.Builtin */ .highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */ .highlight .no { color: #003366; font-weight: bold } /* Name.Constant */ .highlight .nd { color: #555555 } /* Name.Decorator */ .highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */ .highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */ .highlight .nl { color: #336699; font-style: italic } /* Name.Label */ .highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */ .highlight .py { color: #336699; font-weight: bold } /* Name.Property */ .highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */ .highlight .nv { color: #336699 } /* Name.Variable */ .highlight .ow { color: #008800 } /* Operator.Word */ .highlight .w { color: #bbbbbb } /* Text.Whitespace */ .highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */ .highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */ .highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */ .highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */ .highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */ .highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */ .highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */ .highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */ .highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */ .highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */ .highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */ .highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */ .highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */ .highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */ .highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */ .highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */ .highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */ .highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */ .highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */ .highlight .vc { color: #336699 } /* Name.Variable.Class */ .highlight .vg { color: #dd7700 } /* Name.Variable.Global */ .highlight .vi { color: #3333bb } /* Name.Variable.Instance */ .highlight .vm { color: #336699 } /* Name.Variable.Magic */ .highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */ }
/*
 * ct6_out2in.c - ip6 connection tracker, inside-to-outside path
 *
 * Copyright (c) 2019 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.
 */
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
#include <vppinfra/error.h>
#include <ct6/ct6.h>

typedef struct
{
  u32 sw_if_index;
  u32 next_index;
  u32 session_index;
} ct6_out2in_trace_t;

#ifndef CLIB_MARCH_VARIANT

/* packet trace format function */
static u8 *
format_ct6_out2in_trace (u8 * s, va_list * args)
{
  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  ct6_out2in_trace_t *t = va_arg (*args, ct6_out2in_trace_t *);

  s = format (s, "CT6_OUT2IN: sw_if_index %d, next index %d session %d\n",
	      t->sw_if_index, t->next_index, t->session_index);
  return s;
}

vlib_node_registration_t ct6_out2in_node;

#endif /* CLIB_MARCH_VARIANT */

#define foreach_ct6_out2in_error                \
_(PROCESSED, "ct6 packets processed")           \
_(NO_SESSION, "ct6 no session drops")


typedef enum
{
#define _(sym,str) CT6_OUT2IN_ERROR_##sym,
  foreach_ct6_out2in_error
#undef _
    CT6_OUT2IN_N_ERROR,
} ct6_out2in_error_t;

#ifndef CLIB_MARCH_VARIANT
static char *ct6_out2in_error_strings[] = {
#define _(sym,string) string,
  foreach_ct6_out2in_error
#undef _
};
#endif /* CLIB_MARCH_VARIANT */

typedef enum
{
  CT6_OUT2IN_NEXT_DROP,
  CT6_OUT2IN_N_NEXT,
} ct6_next_t;

always_inline uword
ct6_out2in_inline (vlib_main_t * vm,
		   vlib_node_runtime_t * node, vlib_frame_t * frame,
		   int is_trace)
{
  u32 n_left_from, *from;
  vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
  u16 nexts[VLIB_FRAME_SIZE], *next;
  ct6_main_t *cmp = &ct6_main;
  u32 my_thread_index = vm->thread_index;
  f64 now = vlib_time_now (vm);
  u32 dropped = 0;

  from = vlib_frame_vector_args (frame);
  n_left_from = frame->n_vectors;

  vlib_get_buffers (vm, from, bufs, n_left_from);
  b = bufs;
  next = nexts;

#if 0
  while (n_left_from >= 4)
    {
      /* Prefetch next iteration. */
      if (PREDICT_TRUE (n_left_from >= 8))
	{
	  vlib_prefetch_buffer_header (b[4], STORE);
	  vlib_prefetch_buffer_header (b[5], STORE);
	  vlib_prefetch_buffer_header (b[6], STORE);
	  vlib_prefetch_buffer_header (b[7], STORE);
	  CLIB_PREFETCH (b[4]->data, CLIB_CACHE_LINE_BYTES, STORE);
	  CLIB_PREFETCH (b[5]->data, CLIB_CACHE_LINE_BYTES, STORE);
	  CLIB_PREFETCH (b[6]->data, CLIB_CACHE_LINE_BYTES, STORE);
	  CLIB_PREFETCH (b[7]->data, CLIB_CACHE_LINE_BYTES, STORE);
	}

      /* $$$$ process 4x pkts right here */
      next[0] = 0;
      next[1] = 0;
      next[2] = 0;
      next[3] = 0;

      if (is_trace)
	{
	  if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
	    {
	      ct6_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
	      t->next_index = next[0];
	      t->sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
	    }
	  if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
	    {
	      ct6_trace_t *t = vlib_add_trace (vm, node, b[1], sizeof (*t));
	      t->next_index = next[1];
	      t->sw_if_index = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
	    }
	  if (b[2]->flags & VLIB_BUFFER_IS_TRACED)
	    {
	      ct6_trace_t *t = vlib_add_trace (vm, node, b[2], sizeof (*t));
	      t->next_index = next[2];
	      t->sw_if_index = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
	    }
	  if (b[3]->flags & VLIB_BUFFER_IS_TRACED)
	    {
	      ct6_trace_t *t = vlib_add_trace (vm, node, b[3], sizeof (*t));
	      t->next_index = next[3];
	      t->sw_if_index = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
	    }
	}

      b += 4;
      next += 4;
      n_left_from -= 4;
    }
#endif

  while (n_left_from > 0)
    {
      clib_bihash_kv_48_8_t kvp0;
      ct6_session_key_t *key0;
      ct6_session_t *s0;
      u32 session_index0 = ~0;
      u32 next0;

      ip6_header_t *ip0;
      udp_header_t *udp0;

      /* Are we having fun yet? */
      vnet_feature_next (&next0, b[0]);
      next[0] = next0;

      ip0 = vlib_buffer_get_current (b[0]);

      /*
       * Pass non-global unicast traffic
       */
      if (PREDICT_FALSE (!ip6_address_is_global_unicast (&ip0->src_address)
			 ||
			 !ip6_address_is_global_unicast (&ip0->src_address)))
	goto trace0;
      /* Pass non-udp, non-tcp traffic */
      if (PREDICT_FALSE (ip0->protocol != IP_PROTOCOL_TCP &&
			 ip0->protocol != IP_PROTOCOL_UDP))
	goto trace0;

      udp0 = ip6_next_header (ip0);

      /*
       * See if we know about this flow.
       */
      key0 = (ct6_session_key_t *) & kvp0;
      clib_memcpy_fast (&key0->src, &ip0->src_address,
			sizeof (ip6_address_t));
      clib_memcpy_fast (&key0->dst, &ip0->dst_address,
			sizeof (ip6_address_t));
      key0->as_u64[4] = 0;
      key0->as_u64[5] = 0;
      key0->sport = udp0->src_port;
      key0->dport = udp0->dst_port;
      key0->proto = ip0->protocol;

      /* Do we know about this session? */
      if (clib_bihash_search_48_8 (&cmp->session_hash, &kvp0, &kvp0) < 0)
	{
	  /* Bad engineer, no donut for you... */
	  next[0] = CT6_OUT2IN_NEXT_DROP;
	  b[0]->error = node->errors[CT6_OUT2IN_ERROR_NO_SESSION];
	  dropped++;
	  goto trace0;
	}
      else
	{
	  s0 = pool_elt_at_index (cmp->sessions[my_thread_index], kvp0.value);
	  session_index0 = kvp0.value;
	  ct6_update_session_hit (cmp, s0, now);
	}

    trace0:
      if (is_trace)
	{
	  if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
	    {
	      ct6_out2in_trace_t *t =
		vlib_add_trace (vm, node, b[0], sizeof (*t));
	      t->next_index = next[0];
	      t->sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
	      t->session_index = session_index0;
	    }
	}

      b += 1;
      next += 1;
      n_left_from -= 1;
    }

  vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);

  vlib_node_increment_counter (vm, node->node_index,
			       CT6_OUT2IN_ERROR_PROCESSED, frame->n_vectors);
  vlib_node_increment_counter (vm, node->node_index,
			       CT6_OUT2IN_ERROR_NO_SESSION, dropped);

  return frame->n_vectors;
}

VLIB_NODE_FN (ct6_out2in_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
				vlib_frame_t * frame)
{
  if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
    return ct6_out2in_inline (vm, node, frame, 1 /* is_trace */ );
  else
    return ct6_out2in_inline (vm, node, frame, 0 /* is_trace */ );
}

/* *INDENT-OFF* */
#ifndef CLIB_MARCH_VARIANT
VLIB_REGISTER_NODE (ct6_out2in_node) =
{
  .name = "ct6-out2in",
  .vector_size = sizeof (u32),
  .format_trace = format_ct6_out2in_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_errors = ARRAY_LEN(ct6_out2in_error_strings),
  .error_strings = ct6_out2in_error_strings,

  .n_next_nodes = CT6_OUT2IN_N_NEXT,

  /* edit / add dispositions here */
  .next_nodes = {
        [CT6_OUT2IN_NEXT_DROP] = "error-drop",
  },
};
#endif /* CLIB_MARCH_VARIANT */
/* *INDENT-ON* */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */