/*
 * 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.
 */
/*
  Copyright (c) 2001, 2002, 2003 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.
*/

#ifndef included_error_bootstrap_h
#define included_error_bootstrap_h

/* Bootstrap include so that #include <vppinfra/mem.h> can include e.g.
   <vppinfra/mheap.h> which depends on <vppinfra/vec.h>. */

#include <vppinfra/clib.h>	/* for uword */

enum
{
  CLIB_ERROR_FATAL = 1 << 0,
  CLIB_ERROR_ABORT = 1 << 1,
  CLIB_ERROR_WARNING.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 */
/*
 * Copyright (c) 2016 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 <vnet/lisp-cp/lisp_msg_serdes.h>
#include <vnet/lisp-cp/packets.h>
#include <vppinfra/time.h>

void *lisp_msg_put_gid (vlib_buffer_t * b, gid_address_t * gid);

static void
lisp_msg_put_locators (vlib_buffer_t * b, locator_t * locators)
{
  locator_t *loc;

  vec_foreach (loc, locators)
  {
    u8 *p = vlib_buffer_put_uninit (b, sizeof (locator_hdr_t));
    clib_memset (p, 0, sizeof (locator_hdr_t));
    LOC_PRIORITY (p) = loc->priority;
    LOC_MPRIORITY (p) = loc->mpriority;
    LOC_WEIGHT (p) = loc->weight;
    LOC_MWEIGHT (p) = loc->mweight;
    LOC_LOCAL (p) = loc->local;
    LOC_PROBED (p) = loc->probed ? 1 : 0;
    LOC_REACHABLE (p) = loc->state ? 1 : 0;
    lisp_msg_put_gid (b, &loc->address);
  }
}

static void
lisp_msg_put_mapping_record (vlib_buffer_t * b, mapping_t * record)
{
  mapping_record_hdr_t *p =
    vlib_buffer_put_uninit (b, sizeof (mapping_record_hdr_t));
  gid_address_t *eid = &record->eid;

  clib_memset (p, 0, sizeof (*p));
  MAP_REC_EID_PLEN (p) = gid_address_len (eid);
  MAP_REC_TTL (p) = clib_host_to_net_u32 (MAP_REGISTER_DEFAULT_TTL);
  MAP_REC_AUTH (p) = record->authoritative ? 1 : 0;
  MAP_REC_LOC_COUNT (p) = vec_len (record->locators);

  lisp_msg_put_gid (b, eid);
  lisp_msg_put_locators (b, record->locators);
}

static void
lisp_msg_put_mreg_records (vlib_buffer_t * b, mapping_t * records)
{
  u32 i;
  for (i = 0; i < vec_len (records); i++)
    lisp_msg_put_mapping_record (b, &records[i]);
}

void *
lisp_msg_put_gid (vlib_buffer_t * b, gid_address_t * gid)
{
  u8 *p = 0;
  if (!gid)
    {
      /* insert only src-eid-afi field set to 0 */
      p = vlib_buffer_put_uninit (b, sizeof (u16));
      *(u16 *) p = 0;
    }
  else
    {
      p = vlib_buffer_put_uninit (b, gid_address_size_to_put (gid));
      gid_address_put (p, gid);
    }
  return p;
}

static void *
lisp_msg_put_itr_rlocs (lisp_cp_main_t * lcm, vlib_buffer_t * b,
			gid_address_t * rlocs, u8 * locs_put)
{
  u8 *bp, count = 0;
  u32 i;

  bp = vlib_buffer_get_current (b);
  for (i = 0; i < vec_len (rlocs); i++)
    {
      lisp_msg_put_gid (b, &rlocs[i]);
      count++;
    }

  *locs_put = count - 1;
  return bp;
}

void *
lisp_msg_put_eid_rec (vlib_buffer_t * b, gid_address_t * eid)
{
  eid_record_hdr_t *h = vlib_buffer_put_uninit (b, sizeof (*h));

  clib_memset (h, 0, sizeof (*h));
  EID_REC_MLEN (h) = gid_address_len (eid);
  lisp_msg_put_gid (b, eid);
  return h;
}

u64
nonce_build (u32 seed)
{
  u64 nonce;
  u32 nonce_lower;
  u32 nonce_upper;
  struct timespec ts;

  /* Put nanosecond clock in lower 32-bits and put an XOR of the nanosecond
   * clock with the second clock in the upper 32-bits. */
  syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts);
  nonce_lower = ts.tv_nsec;
  nonce_upper = ts.tv_sec ^ clib_host_to_net_u32 (nonce_lower);

  /* OR in a caller provided seed to the low-order 32-bits. */
  nonce_lower |= seed;

  /* Return 64-bit nonce. */
  nonce = nonce_upper;
  nonce = (nonce << 32) | nonce_lower;
  return nonce;
}

void *
lisp_msg_put_map_reply (vlib_buffer_t * b, mapping_t * records, u64 nonce,
			u8 probe_bit)
{
  map_reply_hdr_t *h = vlib_buffer_put_uninit (b, sizeof (h[0]));

  clib_memset (h, 0, sizeof (h[0]));
  MREP_TYPE (h) = LISP_MAP_REPLY;
  MREP_NONCE (h) = nonce;
  MREP_REC_COUNT (h) = 1;
  MREP_RLOC_PROBE (h) = probe_bit;

  lisp_msg_put_mreg_records (b, records);
  return h;
}

void *
lisp_msg_put_map_register (vlib_buffer_t * b, mapping_t * records,
			   u8 want_map_notify, u16 auth_data_len, u64 * nonce,
			   u32 * msg_len)
{
  u8 *auth_data = 0;

  /* Basic header init */
  map_register_hdr_t *h = vlib_buffer_put_uninit (b, sizeof (h[0]));

  clib_memset (h, 0, sizeof (h[0]));
  MREG_TYPE (h) = LISP_MAP_REGISTER;
  MREG_NONCE (h) = nonce_build (0);
  MREG_WANT_MAP_NOTIFY (h) = want_map_notify ? 1 : 0;
  MREG_REC_COUNT (h) = vec_len (records);

  auth_data = vlib_buffer_put_uninit (b, auth_data_len);
  clib_memset (auth_data, 0, auth_data_len);

  /* Put map register records */
  lisp_msg_put_mreg_records (b, records);

  nonce[0] = MREG_NONCE (h);
  msg_len[0] = vlib_buffer_get_tail (b) - (u8 *) h;
  return h;
}

void *
lisp_msg_put_mreq (lisp_cp_main_t * lcm, vlib_buffer_t * b,
		   gid_address_t * seid, gid_address_t * deid,
		   gid_address_t * rlocs, u8 is_smr_invoked,
		   u8 rloc_probe_set, u64 * nonce)
{
  u8 loc_count = 0;

  /* Basic header init */
  map_request_hdr_t *h = vlib_buffer_put_uninit (b, sizeof (h[0]));

  clib_memset (h, 0, sizeof (h[0]));
  MREQ_TYPE (h) = LISP_MAP_REQUEST;
  MREQ_NONCE (h) = nonce_build (0);
  MREQ_SMR_INVOKED (h) = is_smr_invoked ? 1 : 0;
  MREQ_RLOC_PROBE (h) = rloc_probe_set ? 1 : 0;

  /* We're adding one eid record */
  increment_record_count (h);

  /* Fill source eid */
  lisp_msg_put_gid (b, seid);

  /* Put itr rlocs */
  lisp_msg_put_itr_rlocs (lcm, b, rlocs, &loc_count);
  MREQ_ITR_RLOC_COUNT (h) = loc_count;

  /* Put eid record */
  lisp_msg_put_eid_rec (b, deid);

  nonce[0] = MREQ_NONCE (h);
  return h;
}

void *
lisp_msg_push_ecm (vlib_main_t * vm, vlib_buffer_t * b, int lp, int rp,
		   gid_address_t * la, gid_address_t * ra)
{
  ecm_hdr_t *h;
  ip_address_t _src_ip, *src_ip = &_src_ip, _dst_ip, *dst_ip = &_dst_ip;
  if (gid_address_type (la) != GID_ADDR_IP_PREFIX)
    {
      /* empty ip4 */
      clib_memset (src_ip, 0, sizeof (src_ip[0]));
      clib_memset (dst_ip, 0, sizeof (dst_ip[0]));
    }
  else
    {
      src_ip = &gid_address_ip (la);
      dst_ip = &gid_address_ip (ra);
    }

  /* Push inner ip and udp */
  pkt_push_udp_and_ip (vm, b, lp, rp, src_ip, dst_ip, 0);

  /* Push lisp ecm hdr */
  h = pkt_push_ecm_hdr (b);

  return h;
}

static u32
msg_type_to_hdr_len (lisp_msg_type_e type)
{
  switch (type)
    {
    case LISP_MAP_REQUEST:
      return (sizeof (map_request_hdr_t));
    case LISP_MAP_REPLY:
      return (sizeof (map_reply_hdr_t));
    default:
      return (0);
    }
}

void *
lisp_msg_pull_hdr (vlib_buffer_t * b, lisp_msg_type_e type)
{
  return vlib_buffer_pull (b, msg_type_to_hdr_len (type));
}

u32
lisp_msg_parse_addr (vlib_buffer_t * b, gid_address_t * eid)
{
  u32 len;
  clib_memset (eid, 0, sizeof (*eid));
  len = gid_address_parse (vlib_buffer_get_current (b), eid);
  if (len != ~0)
    vlib_buffer_pull (b, len);
  return len;
}

u32
lisp_msg_parse_eid_rec (vlib_buffer_t * b, gid_address_t * eid)
{
  eid_record_hdr_t *h = vlib_buffer_get_current (b);
  u32 len;
  clib_memset (eid, 0, sizeof (*eid));
  len = gid_address_parse (EID_REC_ADDR (h), eid);
  if (len == ~0)
    return len;

  gid_address_ippref_len (eid) = EID_REC_MLEN (h);
  vlib_buffer_pull (b, len + sizeof (eid_record_hdr_t));

  return len + sizeof (eid_record_hdr_t);
}

u32
lisp_msg_parse_itr_rlocs (vlib_buffer_t * b, gid_address_t ** rlocs,
			  u8 rloc_count)
{
  gid_address_t tloc;
  u32 i, len = 0, tlen = 0;

  //MREQ_ITR_RLOC_COUNT(mreq_hdr) + 1
  for (i = 0; i < rloc_count; i++)
    {
      len = lisp_msg_parse_addr (b, &tloc);
      if (len == ~0)
	return len;
      vec_add1 (*rlocs, tloc);
      tlen += len;
    }
  return tlen;
}

u32
lisp_msg_parse_loc (vlib_buffer_t * b, locator_t * loc)
{
  int len;

  len = locator_parse (vlib_buffer_get_current (b), loc);
  if (len == ~0)
    return ~0;

  if (!vlib_buffer_has_space (b, sizeof (len)))
    return ~0;
  vlib_buffer_pull (b, len);

  return len;
}

u32
lisp_msg_parse_mapping_record (vlib_buffer_t * b, gid_address_t * eid,
			       locator_t ** locs, locator_t * probed_)
{
  void *h = 0, *loc_hdr = 0;
  locator_t loc, *probed = 0;
  int i = 0, len = 0, llen = 0;

  h = vlib_buffer_get_current (b);
  if (!vlib_buffer_has_space (b, sizeof (mapping_record_hdr_t)))
    return ~0;

  vlib_buffer_pull (b, sizeof (mapping_record_hdr_t));

  clib_memset (eid, 0, sizeof (*eid));
  len = gid_address_parse (vlib_buffer_get_current (b), eid);
  if (len == ~0)
    return len;

  if (!vlib_buffer_has_space (b, sizeof (len)))
    return ~0;

  vlib_buffer_pull (b, len);
  if (GID_ADDR_IP_PREFIX == gid_address_type (eid))
    gid_address_ippref_len (eid) = MAP_REC_EID_PLEN (h);

  for (i = 0; i < MAP_REC_LOC_COUNT (h); i++)
    {
      loc_hdr = vlib_buffer_get_current (b);

      llen = lisp_msg_parse_loc (b, &loc);
      if (llen == ~0)
	return llen;
      vec_add1 (*locs, loc);
      len += llen;

      if (LOC_PROBED (loc_hdr))
	{
	  if (probed != 0)
	    clib_warning
	      ("Multiple locators probed! Probing only the first!");
	  else
	    probed = &loc;
	}
    }
  /* XXX */
  if (probed_ != 0 && probed)
    *probed_ = *probed;

  return len + sizeof (map_reply_hdr_t);
}

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