/* packet-ipnet.c
 * Routines for decoding Solaris IPNET packet disassembly
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"

#include <glib.h>

#include <epan/aftypes.h>
#include <epan/packet.h>
#include <wiretap/wtap.h>

void proto_register_ipnet(void);
void proto_reg_handoff_ipnet(void);

static int proto_ipnet   = -1;
static int hf_version    = -1;
static int hf_family     = -1;
static int hf_htype      = -1;
static int hf_pktlen     = -1;
static int hf_ifindex    = -1;
static int hf_grifindex  = -1;
static int hf_zsrc       = -1;
static int hf_zdst       = -1;

static gint ett_raw = -1;

static dissector_handle_t ip_handle;
static dissector_handle_t ipv6_handle;

static const value_string solaris_family_vals[] = {
  { SOLARIS_AF_INET,  "Solaris AF_INET"  },
  { SOLARIS_AF_INET6, "Solaris AF_INET6" },
  { 0, NULL }
};

static const value_string htype_vals[] = {
  { 0, "Inbound"  },
  { 1, "Outbound" },
  { 2, "Local"    },
  { 0, NULL }
};

static void
dissect_ipnet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
  proto_tree *fh_tree;
  proto_item *ti;
  tvbuff_t *next_tvb;
  guint32 pktlen;
  guint8 family;

  /* load the top pane info. This should be overwritten by
     the next protocol in the stack */
  col_set_str(pinfo->cinfo, COL_PROTOCOL, "IPNET");
  col_set_str(pinfo->cinfo, COL_INFO, "Solaris IPNET");

  /* populate a tree in the second pane with the IPNET header data */
  if(tree) {
    ti = proto_tree_add_item (tree, proto_ipnet, tvb, 0, 24, ENC_NA);
    fh_tree = proto_item_add_subtree(ti, ett_raw);

    proto_tree_add_item(fh_tree, hf_version, tvb, 0, 1, ENC_BIG_ENDIAN);
    proto_tree_add_item(fh_tree, hf_family, tvb, 1, 1, ENC_BIG_ENDIAN);
    proto_tree_add_item(fh_tree, hf_htype, tvb, 2, 2, ENC_BIG_ENDIAN);
    proto_tree_add_item(fh_tree, hf_pktlen, tvb, 4, 4, ENC_BIG_ENDIAN);
    proto_tree_add_item(fh_tree, hf_ifindex, tvb, 8, 4, ENC_BIG_ENDIAN);
    proto_tree_add_item(fh_tree, hf_grifindex, tvb, 12, 4, ENC_BIG_ENDIAN);
    proto_tree_add_item(fh_tree, hf_zsrc, tvb, 16, 4, ENC_BIG_ENDIAN);
    proto_tree_add_item(fh_tree, hf_zdst, tvb, 20, 4, ENC_BIG_ENDIAN);
  }

  pktlen = tvb_get_ntohl(tvb, 4);
  next_tvb = tvb_new_subset_remaining(tvb, tvb_length(tvb) - pktlen);

  family = tvb_get_guint8(tvb, 1);
  switch (family) {
  case SOLARIS_AF_INET:
    call_dissector(ip_handle, next_tvb, pinfo, tree);
    break;
  case SOLARIS_AF_INET6:
    call_dissector(ipv6_handle, next_tvb, pinfo, tree);
    break;
  default:
    break;
  }
}

void
proto_register_ipnet(void)
{
  static hf_register_info hf[] = {
    { &hf_version,	{ "Header version",		"ipnet.version",
      FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},

    { &hf_family,	{ "Address family",		"ipnet.family",
      FT_UINT8, BASE_DEC, VALS(solaris_family_vals), 0x0, NULL, HFILL }},

    { &hf_htype,	{ "Hook type",			"ipnet.htype",
      FT_UINT16, BASE_DEC, VALS(htype_vals), 0x0, NULL, HFILL }},

    { &hf_pktlen,	{ "Data length",		"ipnet.pktlen",
      FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},

    { &hf_ifindex,	{ "Interface index",		"ipnet.ifindex",
      FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},

    { &hf_grifindex,	{ "Group interface index",	"ipnet.grifindex",
      FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},

    { &hf_zsrc,		{ "Source Zone ID",		"ipnet.zsrc",
      FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},

    { &hf_zdst,		{ "Destination Zone ID",	"ipnet.zdst",
      FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
  };
  static gint *ett[] = {
    &ett_raw,
  };

  proto_ipnet = proto_register_protocol("Solaris IPNET", "IPNET", "ipnet");
  proto_register_field_array(proto_ipnet, hf, array_length(hf));
  proto_register_subtree_array(ett, array_length(ett));
}

void
proto_reg_handoff_ipnet(void)
{
  dissector_handle_t ipnet_handle;

  /*
   * Get handles for the IP and IPv6 dissectors.
   */
  ip_handle = find_dissector("ip");
  ipv6_handle = find_dissector("ipv6");

  ipnet_handle = create_dissector_handle(dissect_ipnet, proto_ipnet);
  dissector_add_uint("wtap_encap", WTAP_ENCAP_IPNET, ipnet_handle);
}
