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/*
 * Copyright (c) 2017-2019 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.
 */

#ifndef __HICN_DATA_PCSLOOKUP_H__
#define __HICN_DATA_PCSLOOKUP_H__

#include "pcs.h"

/*
 * Node context data; we think this is per-thread/instance
 */
typedef struct hicn_data_pcslookup_runtime_s
{
  int id;
  hicn_pit_cs_t *pitcs;
} hicn_data_pcslookup_runtime_t;

/* Trace context struct */
typedef struct
{
  u32 next_index;
  u32 sw_if_index;
  u8 pkt_type;
} hicn_data_pcslookup_trace_t;

typedef enum
{
  HICN_DATA_PCSLOOKUP_NEXT_V4_LOOKUP,
  HICN_DATA_PCSLOOKUP_NEXT_V6_LOOKUP,
  HICN_DATA_PCSLOOKUP_NEXT_STORE_DATA,
  HICN_DATA_PCSLOOKUP_NEXT_DATA_FWD,	/* This must be one position
					 * before the error drop!! */
  HICN_DATA_PCSLOOKUP_NEXT_ERROR_DROP,
  HICN_DATA_PCSLOOKUP_N_NEXT,
} hicn_data_pcslookup_next_t;

#endif /* //__HICN_DATA_PCSLOOKUP_H__ */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables: eval: (c-set-style "gnu") End:
 */
e */ .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 */ }
/*
 * 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.
 */
/*
 * llc.c: llc support
 *
 * Copyright (c) 2010 Eliot Dresselhaus
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <vnet/vnet.h>
#include <vnet/llc/llc.h>

/* Global main structure. */
llc_main_t llc_main;

u8 *
format_llc_protocol (u8 * s, va_list * args)
{
  llc_protocol_t p = va_arg (*args, u32);
  llc_main_t *pm = &llc_main;
  llc_protocol_info_t *pi = llc_get_protocol_info (pm, p);

  if (pi)
    s = format (s, "%s", pi->name);
  else
    s = format (s, "0x%02x", p);

  return s;
}

u8 *
format_llc_header_with_length (u8 * s, va_list * args)
{
  llc_main_t *pm = &llc_main;
  llc_header_t *h = va_arg (*args, llc_header_t *);
  u32 max_header_bytes = va_arg (*args, u32);
  llc_protocol_t p = h->dst_sap;
  u32 indent, header_bytes;

  header_bytes = llc_header_length (h);
  if (max_header_bytes != 0 && header_bytes > max_header_bytes)
    return format (s, "llc header truncated");

  indent = format_get_indent (s);

  s = format (s, "LLC %U -> %U",
	      format_llc_protocol, h->src_sap,
	      format_llc_protocol, h->dst_sap);

  if (h->control != 0x03)
    s = format (s, ", control 0x%x", llc_header_get_control (h));

  if (max_header_bytes != 0 && header_bytes > max_header_bytes)
    {
      llc_protocol_info_t *pi = llc_get_protocol_info (pm, p);
      vlib_node_t *node = vlib_get_node (pm->vlib_main, pi->node_index);
      if (node->format_buffer)
	s = format (s, "\n%U%U",
		    format_white_space, indent,
		    node->format_buffer, (void *) (h + 1),
		    max_header_bytes - header_bytes);
    }

  return s;
}

u8 *
format_llc_header (u8 * s, va_list * args)
{
  llc_header_t *h = va_arg (*args, llc_header_t *);
  return format (s, "%U", format_llc_header_with_length, h, 0);
}

/* Returns llc protocol as an int in host byte order. */
uword
unformat_llc_protocol (unformat_input_t * input, va_list * args)
{
  u8 *result = va_arg (*args, u8 *);
  llc_main_t *pm = &llc_main;
  int p, i;

  /* Numeric type. */
  if (unformat (input, "0x%x", &p) || unformat (input, "%d", &p))
    {
      if (p >= (1 << 8))
	return 0;
      *result = p;
      return 1;
    }

  /* Named type. */
  if (unformat_user (input, unformat_vlib_number_by_name,
		     pm->protocol_info_by_name, &i))
    {
      llc_protocol_info_t *pi = vec_elt_at_index (pm->protocol_infos, i);
      *result = pi->protocol;
      return 1;
    }

  return 0;
}

uword
unformat_llc_header (unformat_input_t * input, va_list * args)
{
  u8 **result = va_arg (*args, u8 **);
  llc_header_t _h, *h = &_h;
  u8 p;

  if (!unformat (input, "%U", unformat_llc_protocol, &p))
    return 0;

  h->src_sap = h->dst_sap = p;
  h->control = 0x3;

  /* Add header to result. */
  {
    void *p;
    u32 n_bytes = sizeof (h[0]);

    vec_add2 (*result, p, n_bytes);
    clib_memcpy (p, h, n_bytes);
  }

  return 1;
}

static u8 *
llc_build_rewrite (vnet_main_t * vnm,
		   u32 sw_if_index,
		   vnet_link_t link_type, const void *dst_address)
{
  llc_header_t *h;
  u8 *rewrite = NULL;
  llc_protocol_t protocol;

  switch (link_type)
    {
#define _(a,b) case VNET_LINK_##a: protocol = LLC_PROTOCOL_##b; break
      _(IP4, ip4);
#undef _
    default:
      return (NULL);
    }

  vec_validate (rewrite, sizeof (*h) - 1);
  h = (llc_header_t *) rewrite;
  h->src_sap = h->dst_sap = protocol;
  h->control = 0x3;

  return (rewrite);
}

/* *INDENT-OFF* */
VNET_HW_INTERFACE_CLASS (llc_hw_interface_class) = {
  .name = "LLC",
  .format_header = format_llc_header_with_length,
  .unformat_header = unformat_llc_header,
  .build_rewrite = llc_build_rewrite,
};
/* *INDENT-ON* */

static void
add_protocol (llc_main_t * pm, llc_protocol_t protocol, char *protocol_name)
{
  llc_protocol_info_t *pi;
  u32 i;

  vec_add2 (pm->protocol_infos, pi, 1);
  i = pi - pm->protocol_infos;

  pi->name = protocol_name;
  pi->protocol = protocol;
  pi->next_index = pi->node_index = ~0;

  hash_set (pm->protocol_info_by_protocol, protocol, i);
  hash_set_mem (pm->protocol_info_by_name, pi->name, i);
}

static clib_error_t *
llc_init (vlib_main_t * vm)
{
  clib_error_t *error;
  llc_main_t *pm = &llc_main;

  memset (pm, 0, sizeof (pm[0]));
  pm->vlib_main = vm;

  pm->protocol_info_by_name = hash_create_string (0, sizeof (uword));
  pm->protocol_info_by_protocol = hash_create (0, sizeof (uword));

#define _(f,n) add_protocol (pm, LLC_PROTOCOL_##f, #f);
  foreach_llc_protocol;
#undef _

  if ((error = vlib_call_init_function (vm, snap_init)))
    return error;

  return vlib_call_init_function (vm, llc_input_init);
}

VLIB_INIT_FUNCTION (llc_init);


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