/* packet-ipv6.c
- * Routines for IPv6 packet disassembly
+ * Routines for IPv6 packet disassembly
*
- * $Id: packet-ipv6.c,v 1.18 1999/10/13 06:47:47 guy Exp $
+ * $Id: packet-ipv6.c,v 1.78 2002/02/27 05:45:48 guy Exp $
*
* Ethereal - Network traffic analyzer
- * By Gerald Combs <gerald@zing.org>
+ * By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
- *
+ * MobileIPv6 support added by Tomislav Borosa <tomislav.borosa@siemens.hr>
+ *
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#include <string.h>
#include <stdio.h>
#include <glib.h>
-#include "packet.h"
+#include <epan/packet.h>
#include "packet-ip.h"
+#include "packet-ipsec.h"
#include "packet-ipv6.h"
-#include "resolv.h"
+#include <epan/resolv.h>
+#include "prefs.h"
+#include "reassemble.h"
+#include "ipproto.h"
+#include "etypes.h"
+#include "ppptypes.h"
+#include "aftypes.h"
+#include "nlpid.h"
+
+/*
+ * NOTE: ipv6.nxt is not very useful as we will have chained header.
+ * now testing ipv6.final, but it raises SEGV.
+#define TEST_FINALHDR
+ */
static int proto_ipv6 = -1;
+static int hf_ipv6_version = -1;
+static int hf_ipv6_class = -1;
+static int hf_ipv6_flow = -1;
+static int hf_ipv6_plen = -1;
+static int hf_ipv6_nxt = -1;
+static int hf_ipv6_hlim = -1;
static int hf_ipv6_src = -1;
static int hf_ipv6_dst = -1;
+static int hf_ipv6_addr = -1;
+#ifdef TEST_FINALHDR
+static int hf_ipv6_final = -1;
+#endif
+static int hf_ipv6_fragments = -1;
+static int hf_ipv6_fragment = -1;
+static int hf_ipv6_fragment_overlap = -1;
+static int hf_ipv6_fragment_overlap_conflict = -1;
+static int hf_ipv6_fragment_multiple_tails = -1;
+static int hf_ipv6_fragment_too_long_fragment = -1;
+static int hf_ipv6_fragment_error = -1;
+
+static int hf_ipv6_mipv6_type = -1;
+static int hf_ipv6_mipv6_length = -1;
+static int hf_ipv6_mipv6_a_flag = -1;
+static int hf_ipv6_mipv6_h_flag = -1;
+static int hf_ipv6_mipv6_r_flag = -1;
+static int hf_ipv6_mipv6_d_flag = -1;
+static int hf_ipv6_mipv6_m_flag = -1;
+static int hf_ipv6_mipv6_b_flag = -1;
+static int hf_ipv6_mipv6_prefix_length = -1;
+static int hf_ipv6_mipv6_sequence_number = -1;
+static int hf_ipv6_mipv6_life_time = -1;
+static int hf_ipv6_mipv6_status = -1;
+static int hf_ipv6_mipv6_refresh = -1;
+static int hf_ipv6_mipv6_home_address = -1;
+static int hf_ipv6_mipv6_sub_type = -1;
+static int hf_ipv6_mipv6_sub_length = -1;
+static int hf_ipv6_mipv6_sub_unique_ID = -1;
+static int hf_ipv6_mipv6_sub_alternative_COA = -1;
+
+static gint ett_ipv6 = -1;
+static gint ett_ipv6_fragments = -1;
+static gint ett_ipv6_fragment = -1;
+
+static dissector_handle_t data_handle;
+
+/* Reassemble fragmented datagrams */
+static gboolean ipv6_reassemble = FALSE;
#ifndef offsetof
#define offsetof(type, member) ((size_t)(&((type *)0)->member))
#endif
-static const char *
-inet_ntop6(const u_char *src, char *dst, size_t size);
+/*
+ * defragmentation of IPv6
+ */
+static GHashTable *ipv6_fragment_table = NULL;
-static const char *
-inet_ntop4(const u_char *src, char *dst, size_t size);
+static void
+ipv6_reassemble_init(void)
+{
+ fragment_table_init(&ipv6_fragment_table);
+}
static int
-dissect_routing6(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
+dissect_routing6(tvbuff_t *tvb, int offset, proto_tree *tree) {
struct ip6_rthdr rt;
- int len;
+ guint len;
proto_tree *rthdr_tree;
proto_item *ti;
char buf[sizeof(struct ip6_rthdr0) + sizeof(struct e_in6_addr) * 23];
- memcpy(&rt, (void *) &pd[offset], sizeof(rt));
+ tvb_memcpy(tvb, (guint8 *)&rt, offset, sizeof(rt));
len = (rt.ip6r_len + 1) << 3;
if (tree) {
/* !!! specify length */
- ti = proto_tree_add_text(tree, offset, len,
- "Routing Header, Type %d", rt.ip6r_type);
- rthdr_tree = proto_item_add_subtree(ti, ETT_IPv6);
+ ti = proto_tree_add_text(tree, tvb, offset, len,
+ "Routing Header, Type %u", rt.ip6r_type);
+ rthdr_tree = proto_item_add_subtree(ti, ett_ipv6);
- proto_tree_add_text(rthdr_tree,
+ proto_tree_add_text(rthdr_tree, tvb,
offset + offsetof(struct ip6_rthdr, ip6r_nxt), 1,
- "Next header: 0x%02x", rt.ip6r_nxt);
- proto_tree_add_text(rthdr_tree,
+ "Next header: %s (0x%02x)", ipprotostr(rt.ip6r_nxt), rt.ip6r_nxt);
+ proto_tree_add_text(rthdr_tree, tvb,
offset + offsetof(struct ip6_rthdr, ip6r_len), 1,
- "Length: %d (%d bytes)", rt.ip6r_len, len);
- proto_tree_add_text(rthdr_tree,
+ "Length: %u (%d bytes)", rt.ip6r_len, len);
+ proto_tree_add_text(rthdr_tree, tvb,
offset + offsetof(struct ip6_rthdr, ip6r_type), 1,
- "Type: %d", rt.ip6r_type, len);
- proto_tree_add_text(rthdr_tree,
+ "Type: %u", rt.ip6r_type);
+ proto_tree_add_text(rthdr_tree, tvb,
offset + offsetof(struct ip6_rthdr, ip6r_segleft), 1,
- "Segments left: %d", rt.ip6r_segleft, len);
+ "Segments left: %u", rt.ip6r_segleft);
if (rt.ip6r_type == 0 && len <= sizeof(buf)) {
struct e_in6_addr *a;
int n;
struct ip6_rthdr0 *rt0;
- memcpy(buf, (void *) &pd[offset], len);
+ tvb_memcpy(tvb, buf, offset, len);
rt0 = (struct ip6_rthdr0 *)buf;
for (a = rt0->ip6r0_addr, n = 0;
a < (struct e_in6_addr *)(buf + len);
a++, n++) {
- proto_tree_add_text(rthdr_tree,
+ proto_tree_add_text(rthdr_tree, tvb,
offset + offsetof(struct ip6_rthdr0, ip6r0_addr) + n * sizeof(struct e_in6_addr),
sizeof(struct e_in6_addr),
#ifdef INET6
);
}
}
-
+
/* decode... */
}
}
static int
-dissect_frag6(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
+dissect_frag6(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree,
+ guint16 *offlg, guint32 *ident) {
struct ip6_frag frag;
int len;
+ proto_item *ti;
+ proto_tree *rthdr_tree;
- memcpy(&frag, (void *) &pd[offset], sizeof(frag));
+ tvb_memcpy(tvb, (guint8 *)&frag, offset, sizeof(frag));
len = sizeof(frag);
+ frag.ip6f_offlg = ntohs(frag.ip6f_offlg);
+ *offlg = frag.ip6f_offlg;
+ *ident = frag.ip6f_ident;
+ if (check_col(pinfo->cinfo, COL_INFO)) {
+ col_add_fstr(pinfo->cinfo, COL_INFO,
+ "IPv6 fragment (nxt=%s (0x%02x) off=%u id=0x%x)",
+ ipprotostr(frag.ip6f_nxt), frag.ip6f_nxt,
+ frag.ip6f_offlg & IP6F_OFF_MASK, frag.ip6f_ident);
+ }
+ if (tree) {
+ ti = proto_tree_add_text(tree, tvb, offset, len,
+ "Fragmention Header");
+ rthdr_tree = proto_item_add_subtree(ti, ett_ipv6);
+
+ proto_tree_add_text(rthdr_tree, tvb,
+ offset + offsetof(struct ip6_frag, ip6f_nxt), 1,
+ "Next header: %s (0x%02x)",
+ ipprotostr(frag.ip6f_nxt), frag.ip6f_nxt);
- if (check_col(fd, COL_INFO)) {
- col_add_fstr(fd, COL_INFO,
- "IPv6 fragment (nxt=0x%02x off=0x%04x id=0x%x)",
- frag.ip6f_nxt, (frag.ip6f_offlg >> 3) & 0x1fff, frag.ip6f_ident);
+#if 0
+ proto_tree_add_text(rthdr_tree, tvb,
+ offset + offsetof(struct ip6_frag, ip6f_reserved), 1,
+ "Reserved: %u",
+ frag.ip6f_reserved);
+#endif
+
+ proto_tree_add_text(rthdr_tree, tvb,
+ offset + offsetof(struct ip6_frag, ip6f_offlg), 2,
+ "Offset: %u",
+ frag.ip6f_offlg & IP6F_OFF_MASK);
+
+ proto_tree_add_text(rthdr_tree, tvb,
+ offset + offsetof(struct ip6_frag, ip6f_offlg), 2,
+ "More fragments: %s",
+ frag.ip6f_offlg & IP6F_MORE_FRAG ?
+ "Yes" : "No");
+
+ proto_tree_add_text(rthdr_tree, tvb,
+ offset + offsetof(struct ip6_frag, ip6f_ident), 4,
+ "Identification: 0x%08x",
+ frag.ip6f_ident);
}
return len;
}
+/* Binding Update flag description */
+static const true_false_string ipv6_mipv6_bu_a_flag_value = {
+ "Binding Acknowledgement requested",
+ "Binding Acknowledgement not requested"
+};
+static const true_false_string ipv6_mipv6_bu_h_flag_value = {
+ "Home Registration",
+ "No Home Registration"
+};
+static const true_false_string ipv6_mipv6_bu_r_flag_value = {
+ "Router",
+ "Not a Router"
+};
+static const true_false_string ipv6_mipv6_bu_d_flag_value = {
+ "Perform Duplicate Address Detection",
+ "Do not perform Duplicate Address Detection"
+};
+static const true_false_string ipv6_mipv6_bu_m_flag_value = {
+ "MAP Registration",
+ "No MAP Registration"
+};
+static const true_false_string ipv6_mipv6_bu_b_flag_value = {
+ "Request for bicasting",
+ "Do not request for bicasting"
+};
+
static int
-dissect_opts(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
- char *optname) {
+dissect_mipv6_ba(tvbuff_t *tvb, proto_tree *dstopt_tree, int offset)
+{
+ guint8 status, len = 0;
+ const char *status_text;
+ gboolean sub_options = FALSE;
+
+ proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_type, tvb,
+ offset + len, IP6_MIPv6_OPTION_TYPE_LENGTH,
+ tvb_get_guint8(tvb, offset + len),
+ "Option Type: %u (0x%02x) - Binding Acknowledgement",
+ tvb_get_guint8(tvb, offset + len),
+ tvb_get_guint8(tvb, offset + len));
+ len += IP6_MIPv6_OPTION_TYPE_LENGTH;
+ if (tvb_get_guint8(tvb, offset + len) > 11)
+ sub_options = TRUE;
+ proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_length, tvb, offset + len,
+ IP6_MIPv6_OPTION_LENGTH_LENGTH, tvb_get_guint8(tvb, offset + len));
+ len += IP6_MIPv6_OPTION_LENGTH_LENGTH;
+ status = tvb_get_guint8(tvb, offset + len);
+ switch (status) {
+ case BA_OK:
+ status_text = "- Binding Update accepted";
+ break;
+ case BA_REAS_UNSPEC:
+ status_text = "- Binding Update was rejected - Reason unspecified";
+ break;
+ case BA_ADMIN_PROH:
+ status_text = "- Binding Update was rejected - Administratively prohibited";
+ break;
+ case BA_INSUF_RES:
+ status_text = "- Binding Update was rejected - Insufficient resources";
+ break;
+ case BA_NO_HR:
+ status_text = "- Binding Update was rejected - Home registration not supported";
+ break;
+ case BA_NO_SUBNET:
+ status_text = "- Binding Update was rejected - Not home subnet";
+ break;
+ case BA_ERR_ID_LEN:
+ status_text = "- Binding Update was rejected - Incorrect interface identifier length";
+ break;
+ case BA_NO_HA:
+ status_text = "- Binding Update was rejected - Not home agent for this mobile node";
+ break;
+ case BA_DUPL_ADDR:
+ status_text = "- Binding Update was rejected - Duplicate Address Detection failed";
+ break;
+ default:
+ status_text = NULL;
+ break;
+ }
+ if (!status_text) {
+ if (status > 128)
+ status_text = "- Binding Update was rejected";
+ else
+ status_text = "";
+ }
+ proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_status,
+ tvb, offset + len, IP6_MIPv6_STATUS_LENGTH,
+ tvb_get_guint8(tvb, offset + len),
+ "Status: %u %s", tvb_get_guint8(tvb, offset + len), status_text);
+ len += IP6_MIPv6_STATUS_LENGTH;
+ proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_sequence_number,
+ tvb, offset + len, IP6_MIPv6_SEQUENCE_NUMBER_LENGTH,
+ tvb_get_ntohs(tvb, offset + len));
+ len += IP6_MIPv6_SEQUENCE_NUMBER_LENGTH;
+ if (tvb_get_ntohl(tvb, offset + len) == 0xffffffff) {
+ proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_life_time,
+ tvb, offset + len, IP6_MIPv6_LIFE_TIME_LENGTH,
+ tvb_get_ntohl(tvb, offset + len),
+ "Life Time: %u - Infinity", tvb_get_ntohl(tvb, offset + len));
+ } else {
+ proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_life_time,
+ tvb, offset + len, IP6_MIPv6_LIFE_TIME_LENGTH,
+ tvb_get_ntohl(tvb, offset + len));
+ }
+ len += IP6_MIPv6_LIFE_TIME_LENGTH;
+ proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_refresh, tvb,
+ offset + len, IP6_MIPv6_REFRESH_LENGTH,
+ tvb_get_ntohl(tvb, offset + len));
+ len += IP6_MIPv6_REFRESH_LENGTH;
+ /* sub - options */
+ if (sub_options)
+ proto_tree_add_text(dstopt_tree, tvb, offset + len, 1, "Sub-Options");
+ return len;
+}
+
+static int
+dissect_mipv6_bu(tvbuff_t *tvb, proto_tree *dstopt_tree, int offset)
+{
+ int len = 0;
+ gboolean sub_options = FALSE;
+
+ proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_type, tvb, offset,
+ IP6_MIPv6_OPTION_TYPE_LENGTH, tvb_get_guint8(tvb, offset),
+ "Option Type: %u (0x%02x) - Binding Update",
+ tvb_get_guint8(tvb, offset), tvb_get_guint8(tvb, offset));
+ len += IP6_MIPv6_OPTION_TYPE_LENGTH;
+ if (tvb_get_guint8(tvb, offset + len) > 8)
+ sub_options = TRUE;
+ proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_length, tvb, offset + len,
+ IP6_MIPv6_OPTION_LENGTH_LENGTH, tvb_get_guint8(tvb, offset + len));
+ len += IP6_MIPv6_OPTION_LENGTH_LENGTH;
+ proto_tree_add_boolean(dstopt_tree, hf_ipv6_mipv6_a_flag, tvb, offset + len,
+ IP6_MIPv6_FLAGS_LENGTH, tvb_get_guint8(tvb, offset + len));
+ proto_tree_add_boolean(dstopt_tree, hf_ipv6_mipv6_h_flag, tvb, offset + len,
+ IP6_MIPv6_FLAGS_LENGTH, tvb_get_guint8(tvb, offset + len));
+ proto_tree_add_boolean(dstopt_tree, hf_ipv6_mipv6_r_flag, tvb, offset + len,
+ IP6_MIPv6_FLAGS_LENGTH, tvb_get_guint8(tvb, offset + len));
+ proto_tree_add_boolean(dstopt_tree, hf_ipv6_mipv6_d_flag, tvb, offset + len,
+ IP6_MIPv6_FLAGS_LENGTH, tvb_get_guint8(tvb, offset + len));
+ proto_tree_add_boolean(dstopt_tree, hf_ipv6_mipv6_m_flag, tvb, offset + len,
+ IP6_MIPv6_FLAGS_LENGTH, tvb_get_guint8(tvb, offset + len));
+ proto_tree_add_boolean(dstopt_tree, hf_ipv6_mipv6_b_flag, tvb, offset + len,
+ IP6_MIPv6_FLAGS_LENGTH, tvb_get_guint8(tvb, offset + len));
+ len += IP6_MIPv6_FLAGS_LENGTH;
+ proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_prefix_length, tvb,
+ offset + len,
+ IP6_MIPv6_PREFIX_LENGTH_LENGTH, tvb_get_guint8(tvb, offset + len));
+ len += IP6_MIPv6_PREFIX_LENGTH_LENGTH;
+ proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_sequence_number, tvb,
+ offset + len, IP6_MIPv6_SEQUENCE_NUMBER_LENGTH,
+ tvb_get_ntohs(tvb, offset + len));
+ len += IP6_MIPv6_SEQUENCE_NUMBER_LENGTH;
+ if (tvb_get_ntohl(tvb, offset + len) == 0xffffffff) {
+ proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_life_time, tvb,
+ offset + len, IP6_MIPv6_LIFE_TIME_LENGTH,
+ tvb_get_ntohl(tvb, offset + len), "Life Time: %u - Infinity",
+ tvb_get_ntohl(tvb, offset + len));
+ } else {
+ proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_life_time, tvb,
+ offset + len, IP6_MIPv6_LIFE_TIME_LENGTH, tvb_get_ntohl(tvb,
+ offset + len));
+ }
+ len += IP6_MIPv6_LIFE_TIME_LENGTH;
+ /* sub - options */
+ if (sub_options)
+ proto_tree_add_text(dstopt_tree, tvb, offset + len, 1, "Sub-Options");
+ return len;
+}
+
+static int
+dissect_mipv6_ha(tvbuff_t *tvb, proto_tree *dstopt_tree, int offset)
+{
+ int len = 0;
+ gboolean sub_options = FALSE;
+
+ proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_type, tvb,
+ offset + len, IP6_MIPv6_OPTION_TYPE_LENGTH,
+ tvb_get_guint8(tvb, offset + len),
+ "Option Type: %u (0x%02x) - Home Address",
+ tvb_get_guint8(tvb, offset + len), tvb_get_guint8(tvb, offset + len));
+ len += IP6_MIPv6_OPTION_TYPE_LENGTH;
+ if (tvb_get_guint8(tvb, offset + len) > 16)
+ sub_options = TRUE;
+ proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_length, tvb, offset + len,
+ IP6_MIPv6_OPTION_LENGTH_LENGTH, tvb_get_guint8(tvb, offset + len));
+ len += IP6_MIPv6_OPTION_LENGTH_LENGTH;
+ proto_tree_add_ipv6(dstopt_tree, hf_ipv6_mipv6_home_address, tvb,
+ offset + len, IP6_MIPv6_HOME_ADDRESS_LENGTH,
+ tvb_get_ptr(tvb, offset + len, IP6_MIPv6_HOME_ADDRESS_LENGTH));
+ len += IP6_MIPv6_HOME_ADDRESS_LENGTH;
+ /* sub - options */
+ if (sub_options)
+ proto_tree_add_text(dstopt_tree, tvb, offset + len, 1, "Sub-Options");
+ return len;
+}
+
+static int
+dissect_mipv6_br(tvbuff_t *tvb, proto_tree *dstopt_tree, int offset)
+{
+ int len = 0;
+ gboolean sub_options = FALSE;
+
+ proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_type, tvb,
+ offset + len, IP6_MIPv6_OPTION_TYPE_LENGTH,
+ tvb_get_guint8(tvb, offset + len),
+ "Option Type: %u (0x%02x) - Binding Request",
+ tvb_get_guint8(tvb, offset + len), tvb_get_guint8(tvb, offset + len));
+ len += IP6_MIPv6_OPTION_TYPE_LENGTH;
+ if (tvb_get_guint8(tvb, offset + len) > 0)
+ sub_options = TRUE;
+ proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_length, tvb, offset + len,
+ IP6_MIPv6_OPTION_LENGTH_LENGTH, tvb_get_guint8(tvb, offset + len));
+ len += IP6_MIPv6_OPTION_LENGTH_LENGTH;
+ /* sub - options */
+ if (sub_options)
+ proto_tree_add_text(dstopt_tree, tvb, offset + len, 1, "Sub-Options");
+ return len;
+}
+
+static int
+dissect_mipv6_sub_u(tvbuff_t *tvb, proto_tree *dstopt_tree, int offset)
+{
+ int len = 0;
+
+ proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_sub_length, tvb,
+ offset + len, IP6_MIPv6_SUB_TYPE_LENGTH,
+ tvb_get_guint8(tvb, offset + len),
+ "Sub-Option Type: %u (0x%02x) - Unique Identifier Sub-Option",
+ tvb_get_guint8(tvb, offset + len), tvb_get_guint8(tvb, offset + len));
+ len += IP6_MIPv6_SUB_TYPE_LENGTH;
+ proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_sub_length, tvb,
+ offset + len, IP6_MIPv6_SUB_LENGTH_LENGTH,
+ tvb_get_guint8(tvb, offset + len));
+ len += IP6_MIPv6_SUB_LENGTH_LENGTH;
+ proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_sub_unique_ID, tvb,
+ offset + len, IP6_MIPv6_SUB_UNIQUE_ID_LENGTH,
+ tvb_get_ntohs(tvb, offset + len));
+ len += IP6_MIPv6_SUB_UNIQUE_ID_LENGTH;
+ return len;
+}
+
+static int
+dissect_mipv6_sub_a_coa(tvbuff_t *tvb, proto_tree *dstopt_tree, int offset)
+{
+ int len = 0;
+
+ proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_sub_type, tvb,
+ offset + len, IP6_MIPv6_SUB_TYPE_LENGTH,
+ tvb_get_guint8(tvb, offset + len),
+ "Sub-Option Type: %u (0x%02x) - Alternative Care Of Address",
+ tvb_get_guint8(tvb, offset + len),
+ tvb_get_guint8(tvb, offset + len));
+ len += IP6_MIPv6_SUB_TYPE_LENGTH;
+ proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_sub_length, tvb,
+ offset + len, IP6_MIPv6_SUB_LENGTH_LENGTH,
+ tvb_get_guint8(tvb, offset + len));
+ len += IP6_MIPv6_SUB_LENGTH_LENGTH;
+ proto_tree_add_ipv6(dstopt_tree, hf_ipv6_mipv6_sub_alternative_COA, tvb,
+ offset + len, IP6_MIPv6_SUB_ALTERNATIVE_COA_LENGTH,
+ tvb_get_ptr(tvb, offset + len, IP6_MIPv6_SUB_ALTERNATIVE_COA_LENGTH));
+ len += IP6_MIPv6_SUB_ALTERNATIVE_COA_LENGTH;
+ return len;
+}
+
+static const value_string rtalertvals[] = {
+ { IP6OPT_RTALERT_MLD, "MLD" },
+ { IP6OPT_RTALERT_RSVP, "RSVP" },
+ { 0, NULL },
+};
+
+static int
+dissect_opts(tvbuff_t *tvb, int offset, proto_tree *tree, char *optname)
+{
struct ip6_ext ext;
int len;
proto_tree *dstopt_tree;
- proto_item *ti;
- u_char *p;
+ proto_item *ti;
+ gint p;
+ guint8 tmp;
+ int mip_offset = 0, delta = 0;
- memcpy(&ext, (void *) &pd[offset], sizeof(ext));
+ tvb_memcpy(tvb, (guint8 *)&ext, offset, sizeof(ext));
len = (ext.ip6e_len + 1) << 3;
if (tree) {
/* !!! specify length */
- ti = proto_tree_add_text(tree, offset, len,
- "%s Header", optname);
- dstopt_tree = proto_item_add_subtree(ti, ETT_IPv6);
+ ti = proto_tree_add_text(tree, tvb, offset, len, "%s Header ", optname);
- proto_tree_add_text(dstopt_tree,
+ dstopt_tree = proto_item_add_subtree(ti, ett_ipv6);
+
+ proto_tree_add_text(dstopt_tree, tvb,
offset + offsetof(struct ip6_ext, ip6e_nxt), 1,
- "Next header: 0x%02x", ext.ip6e_nxt);
- proto_tree_add_text(dstopt_tree,
+ "Next header: %s (0x%02x)", ipprotostr(ext.ip6e_nxt), ext.ip6e_nxt);
+ proto_tree_add_text(dstopt_tree, tvb,
offset + offsetof(struct ip6_ext, ip6e_len), 1,
- "Length: %d (%d bytes)", ext.ip6e_len, len);
+ "Length: %u (%d bytes)", ext.ip6e_len, len);
+
+ mip_offset = offset;
+ mip_offset += 2;
- p = (u_char *)(pd + offset + 2);
- while (p < pd + offset + len) {
- switch (p[0]) {
+ p = offset + 2;
+
+ while (p < offset + len) {
+ switch (tvb_get_guint8(tvb, p)) {
case IP6OPT_PAD1:
- proto_tree_add_text(dstopt_tree, p - pd, 1,
- "Pad1");
+ proto_tree_add_text(dstopt_tree, tvb, p, 1, "Pad1");
p++;
+ mip_offset++;
break;
case IP6OPT_PADN:
- proto_tree_add_text(dstopt_tree, p - pd, p[1] + 2,
- "PadN: %d bytes", p[1] + 2);
- p += p[1];
+ tmp = tvb_get_guint8(tvb, p + 1);
+ proto_tree_add_text(dstopt_tree, tvb, p, tmp + 2,
+ "PadN: %u bytes", tmp + 2);
+ p += tmp;
p += 2;
+ mip_offset += tvb_get_guint8(tvb, mip_offset + 1) + 2;
break;
case IP6OPT_JUMBO:
- if (p[1] == 4) {
- proto_tree_add_text(dstopt_tree, p - pd, p[1] + 2,
- "Jumbo payload: %u (%d bytes)",
- ntohl(*(guint32 *)&p[2]), p[1] + 2);
+ tmp = tvb_get_guint8(tvb, p + 1);
+ if (tmp == 4) {
+ proto_tree_add_text(dstopt_tree, tvb, p, tmp + 2,
+ "Jumbo payload: %u (%u bytes)",
+ tvb_get_ntohl(tvb, p + 2), tmp + 2);
} else {
- proto_tree_add_text(dstopt_tree, p - pd, p[1] + 2,
- "Jumbo payload: invalid length (%d bytes)",
- p[1] + 2);
+ proto_tree_add_text(dstopt_tree, tvb, p, tmp + 2,
+ "Jumbo payload: Invalid length (%u bytes)",
+ tmp + 2);
}
- p += p[1];
+ p += tmp;
p += 2;
+ mip_offset += tvb_get_guint8(tvb, mip_offset+1)+2;
break;
case IP6OPT_RTALERT:
{
char *rta;
- if (p[1] == 2) {
- switch (ntohs(*(guint16 *)&p[2])) {
- case IP6OPT_RTALERT_MLD:
- rta = "MLD";
- break;
- case IP6OPT_RTALERT_RSVP:
- rta = "RSVP";
- break;
- default:
- rta = "unknown";
- break;
- }
+ tmp = tvb_get_guint8(tvb, p + 1);
+ if (tmp == 2) {
+ rta = val_to_str(tvb_get_ntohs(tvb, p + 2), rtalertvals,
+ "Unknown");
} else
- rta = "invalid length";
- ti = proto_tree_add_text(dstopt_tree, p - pd, p[1] + 2,
- "Router alert: %s (%d bytes)", rta, p[1] + 2);
- p += p[1];
+ rta = "Invalid length";
+ ti = proto_tree_add_text(dstopt_tree, tvb, p , tmp + 2,
+ "Router alert: %s (%u bytes)", rta, tmp + 2);
+ p += tmp;
p += 2;
+ mip_offset += tvb_get_guint8(tvb, mip_offset + 1) + 2;
break;
}
+ case IP6OPT_BINDING_UPDATE :
+ delta = dissect_mipv6_bu(tvb, dstopt_tree, mip_offset);
+ p += delta;
+ mip_offset += delta;
+ break;
+ case IP6OPT_BINDING_ACK :
+ delta = dissect_mipv6_ba(tvb, dstopt_tree, mip_offset);
+ p += delta;
+ mip_offset += delta;
+ break;
+ case IP6OPT_HOME_ADDRESS :
+ delta = dissect_mipv6_ha(tvb, dstopt_tree, mip_offset);
+ p += delta;
+ mip_offset += delta;
+ break;
+ case IP6OPT_BINDING_REQUEST :
+ delta = dissect_mipv6_br(tvb, dstopt_tree, mip_offset);
+ p += delta;
+ mip_offset += delta;
+ break;
+ case IP6OPT_MIPv6_UNIQUE_ID_SUB :
+ delta = dissect_mipv6_sub_u(tvb, dstopt_tree, mip_offset);
+ p += delta;
+ mip_offset += delta;
+ break;
+ case IP6OPT_MIPv6_ALTERNATIVE_COA_SUB :
+ delta = dissect_mipv6_sub_a_coa(tvb, dstopt_tree, mip_offset);
+ p += delta;
+ mip_offset += delta;
+ break;
default:
- p = (u_char *)(pd + offset + len);
+ p = offset + len;
break;
}
}
/* decode... */
}
-
return len;
}
static int
-dissect_hopopts(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
- return dissect_opts(pd, offset, fd, tree, "Hop-by-hop Option");
+dissect_hopopts(tvbuff_t *tvb, int offset, proto_tree *tree)
+{
+ return dissect_opts(tvb, offset, tree, "Hop-by-hop Option");
}
static int
-dissect_dstopts(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
- return dissect_opts(pd, offset, fd, tree, "Destination Option");
+dissect_dstopts(tvbuff_t *tvb, int offset, proto_tree *tree)
+{
+ return dissect_opts(tvb, offset, tree, "Destination Option");
}
-void
-dissect_ipv6(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
- proto_tree *ipv6_tree;
+static void
+dissect_ipv6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+ proto_tree *ipv6_tree = NULL;
proto_item *ti;
guint8 nxt;
int advance;
+ int poffset;
+ guint16 plen;
+ gboolean frag;
+ guint16 offlg;
+ guint32 ident;
+ int offset;
+ fragment_data *ipfd_head;
+ tvbuff_t *next_tvb;
+ gboolean update_col_info = TRUE;
+ gboolean save_fragmented;
struct ip6_hdr ipv6;
- memcpy(&ipv6, (void *) &pd[offset], sizeof(ipv6));
+ if (check_col(pinfo->cinfo, COL_PROTOCOL))
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "IPv6");
+ if (check_col(pinfo->cinfo, COL_INFO))
+ col_clear(pinfo->cinfo, COL_INFO);
+
+ offset = 0;
+ tvb_memcpy(tvb, (guint8 *)&ipv6, offset, sizeof(ipv6));
+
+ pinfo->ipproto = ipv6.ip6_nxt; /* XXX make work TCP follow (ipproto = 6) */
+
+ /* Get the payload length */
+ plen = ntohs(ipv6.ip6_plen);
- if (check_col(fd, COL_PROTOCOL))
- col_add_str(fd, COL_PROTOCOL, "IPv6");
- if (check_col(fd, COL_RES_NET_SRC))
- col_add_str(fd, COL_RES_NET_SRC, get_hostname6(&ipv6.ip6_src));
- if (check_col(fd, COL_UNRES_NET_SRC))
- col_add_str(fd, COL_UNRES_NET_SRC, ip6_to_str(&ipv6.ip6_src));
- if (check_col(fd, COL_RES_NET_DST))
- col_add_str(fd, COL_RES_NET_DST, get_hostname6(&ipv6.ip6_dst));
- if (check_col(fd, COL_UNRES_NET_DST))
- col_add_str(fd, COL_UNRES_NET_DST, ip6_to_str(&ipv6.ip6_dst));
+ /* Adjust the length of this tvbuff to include only the IPv6 datagram. */
+ set_actual_length(tvb, plen + sizeof (struct ip6_hdr));
+
+ SET_ADDRESS(&pinfo->net_src, AT_IPv6, 16, tvb_get_ptr(tvb, offset + IP6H_SRC, 16));
+ SET_ADDRESS(&pinfo->src, AT_IPv6, 16, tvb_get_ptr(tvb, offset + IP6H_SRC, 16));
+ SET_ADDRESS(&pinfo->net_dst, AT_IPv6, 16, tvb_get_ptr(tvb, offset + IP6H_DST, 16));
+ SET_ADDRESS(&pinfo->dst, AT_IPv6, 16, tvb_get_ptr(tvb, offset + IP6H_DST, 16));
if (tree) {
/* !!! specify length */
- ti = proto_tree_add_item(tree, proto_ipv6, offset, 40, NULL);
- ipv6_tree = proto_item_add_subtree(ti, ETT_IPv6);
+ ti = proto_tree_add_item(tree, proto_ipv6, tvb, offset, 40, FALSE);
+ ipv6_tree = proto_item_add_subtree(ti, ett_ipv6);
/* !!! warning: version also contains 4 Bit priority */
- proto_tree_add_text(ipv6_tree,
+ proto_tree_add_uint(ipv6_tree, hf_ipv6_version, tvb,
offset + offsetof(struct ip6_hdr, ip6_vfc), 1,
- "Version: %d", ipv6.ip6_vfc >> 4);
+ (ipv6.ip6_vfc >> 4) & 0x0f);
- proto_tree_add_text(ipv6_tree,
+ proto_tree_add_uint(ipv6_tree, hf_ipv6_class, tvb,
offset + offsetof(struct ip6_hdr, ip6_flow), 4,
- "Traffic class: 0x%02lx",
- (unsigned long)((ntohl(ipv6.ip6_flow) >> 20) & 0xff));
+ (guint8)((ntohl(ipv6.ip6_flow) >> 20) & 0xff));
- /* there should be no alignment problems for ip6_flow, since it's the first
- guint32 in the ipv6 struct */
- proto_tree_add_text(ipv6_tree,
+ /*
+ * there should be no alignment problems for ip6_flow, since it's the first
+ * guint32 in the ipv6 struct
+ */
+ proto_tree_add_uint_format(ipv6_tree, hf_ipv6_flow, tvb,
offset + offsetof(struct ip6_hdr, ip6_flow), 4,
+ (unsigned long)(ntohl(ipv6.ip6_flow) & IPV6_FLOWLABEL_MASK),
"Flowlabel: 0x%05lx",
- (unsigned long)(ntohl(ipv6.ip6_flow & IPV6_FLOWLABEL_MASK)));
+ (unsigned long)(ntohl(ipv6.ip6_flow) & IPV6_FLOWLABEL_MASK));
- proto_tree_add_text(ipv6_tree,
+ proto_tree_add_uint(ipv6_tree, hf_ipv6_plen, tvb,
offset + offsetof(struct ip6_hdr, ip6_plen), 2,
- "Payload Length: %d", ntohs(ipv6.ip6_plen));
+ plen);
- proto_tree_add_text(ipv6_tree,
+ proto_tree_add_uint_format(ipv6_tree, hf_ipv6_nxt, tvb,
offset + offsetof(struct ip6_hdr, ip6_nxt), 1,
- "Next header: 0x%02x", ipv6.ip6_nxt);
+ ipv6.ip6_nxt,
+ "Next header: %s (0x%02x)",
+ ipprotostr(ipv6.ip6_nxt), ipv6.ip6_nxt);
- proto_tree_add_text(ipv6_tree,
+ proto_tree_add_uint(ipv6_tree, hf_ipv6_hlim, tvb,
offset + offsetof(struct ip6_hdr, ip6_hlim), 1,
- "Hop limit: %d", ipv6.ip6_hlim);
+ ipv6.ip6_hlim);
+
+ proto_tree_add_ipv6_hidden(ipv6_tree, hf_ipv6_addr, tvb,
+ offset + offsetof(struct ip6_hdr, ip6_src), 16,
+ ipv6.ip6_src.s6_addr8);
+ proto_tree_add_ipv6_hidden(ipv6_tree, hf_ipv6_addr, tvb,
+ offset + offsetof(struct ip6_hdr, ip6_dst), 16,
+ ipv6.ip6_dst.s6_addr8);
- proto_tree_add_item_format(ipv6_tree, hf_ipv6_src,
+ proto_tree_add_ipv6_format(ipv6_tree, hf_ipv6_src, tvb,
offset + offsetof(struct ip6_hdr, ip6_src), 16,
- &ipv6.ip6_src,
+ (guint8 *)&ipv6.ip6_src,
#ifdef INET6
"Source address: %s (%s)",
get_hostname6(&ipv6.ip6_src),
#endif
ip6_to_str(&ipv6.ip6_src));
- proto_tree_add_item_format(ipv6_tree, hf_ipv6_dst,
+ proto_tree_add_ipv6_format(ipv6_tree, hf_ipv6_dst, tvb,
offset + offsetof(struct ip6_hdr, ip6_dst), 16,
- &ipv6.ip6_dst,
+ (guint8 *)&ipv6.ip6_dst,
#ifdef INET6
"Destination address: %s (%s)",
get_hostname6(&ipv6.ip6_dst),
}
/* start of the new header (could be a extension header) */
- offset += 40;
- nxt = ipv6.ip6_nxt;
+ poffset = offset + offsetof(struct ip6_hdr, ip6_nxt);
+ nxt = tvb_get_guint8(tvb, poffset);
+ offset += sizeof(struct ip6_hdr);
+ offlg = 0;
+ ident = 0;
+
+/* start out assuming this isn't fragmented */
+ frag = FALSE;
again:
- switch (nxt) {
- case IP_PROTO_HOPOPTS:
- advance = dissect_hopopts(pd, offset, fd, tree);
- nxt = pd[offset];
- offset += advance;
- goto again;
- case IP_PROTO_IPIP:
- dissect_ip(pd, offset, fd, tree);
- break;
+ switch (nxt) {
+ case IP_PROTO_HOPOPTS:
+ advance = dissect_hopopts(tvb, offset, tree);
+ nxt = tvb_get_guint8(tvb, offset);
+ poffset = offset;
+ offset += advance;
+ plen -= advance;
+ goto again;
case IP_PROTO_ROUTING:
- advance =dissect_routing6(pd, offset, fd, tree);
- nxt = pd[offset];
- offset += advance;
- goto again;
+ advance = dissect_routing6(tvb, offset, tree);
+ nxt = tvb_get_guint8(tvb, offset);
+ poffset = offset;
+ offset += advance;
+ plen -= advance;
+ goto again;
case IP_PROTO_FRAGMENT:
- advance = dissect_frag6(pd, offset, fd, tree);
- nxt = pd[offset];
- offset += advance;
- goto again;
- case IP_PROTO_ICMPV6:
- dissect_icmpv6(pd, offset, fd, tree);
- break;
- case IP_PROTO_NONE:
- if (check_col(fd, COL_INFO)) {
- col_add_fstr(fd, COL_INFO, "IPv6 no next header");
- }
- break;
+ frag = TRUE;
+ advance = dissect_frag6(tvb, offset, pinfo, tree,
+ &offlg, &ident);
+ nxt = tvb_get_guint8(tvb, offset);
+ poffset = offset;
+ offset += advance;
+ plen -= advance;
+ goto again;
case IP_PROTO_AH:
- advance = dissect_ah(pd, offset, fd, tree);
- nxt = pd[offset];
- offset += advance;
- goto again;
- case IP_PROTO_ESP:
- dissect_esp(pd, offset, fd, tree);
- break;
+ advance = dissect_ah_header(
+ tvb_new_subset(tvb, offset, -1, -1),
+ pinfo, tree, NULL, NULL);
+ nxt = tvb_get_guint8(tvb, offset);
+ poffset = offset;
+ offset += advance;
+ plen -= advance;
+ goto again;
case IP_PROTO_DSTOPTS:
- advance = dissect_dstopts(pd, offset, fd, tree);
- nxt = pd[offset];
- offset += advance;
- goto again;
- case IP_PROTO_TCP:
- dissect_tcp(pd, offset, fd, tree);
- break;
- case IP_PROTO_UDP:
- dissect_udp(pd, offset, fd, tree);
- break;
- case IP_PROTO_PIM:
- dissect_pim(pd, offset, fd, tree);
- break;
- default:
- if (check_col(fd, COL_INFO)) {
- col_add_fstr(fd, COL_INFO, "Unknown IPv6 protocol (0x%02x)",
- ipv6.ip6_nxt);
- }
- dissect_data(pd, offset, fd, tree);
+ advance = dissect_dstopts(tvb, offset, tree);
+ nxt = tvb_get_guint8(tvb, offset);
+ poffset = offset;
+ offset += advance;
+ plen -= advance;
+ goto again;
}
-}
-gchar *
-ip6_to_str(struct e_in6_addr *ad) {
- static gchar buf[4 * 8 + 8];
+#ifdef TEST_FINALHDR
+ proto_tree_add_uint_hidden(ipv6_tree, hf_ipv6_final, tvb, poffset, 1, nxt);
+#endif
- inet_ntop6((u_char*)ad, (gchar*)buf, sizeof(buf));
- return buf;
-}
+ /* If ipv6_reassemble is on, this is a fragment, and we have all the data
+ * in the fragment, then just add the fragment to the hashtable.
+ */
+ save_fragmented = pinfo->fragmented;
+ if (ipv6_reassemble && frag && tvb_reported_length(tvb) <= tvb_length(tvb)) {
+ ipfd_head = fragment_add(tvb, offset, pinfo, ident,
+ ipv6_fragment_table,
+ offlg & IP6F_OFF_MASK,
+ plen,
+ offlg & IP6F_MORE_FRAG);
-#ifndef NS_IN6ADDRSZ
-#define NS_IN6ADDRSZ 16
-#endif
+ if (ipfd_head != NULL) {
+ fragment_data *ipfd;
+ proto_tree *ft = NULL;
+ proto_item *fi = NULL;
-#ifndef NS_INT16SZ
-#define NS_INT16SZ (sizeof(guint16))
-#endif
+ /* OK, we have the complete reassembled payload. */
+ /* show all fragments */
+ fi = proto_tree_add_item(ipv6_tree, hf_ipv6_fragments,
+ tvb, 0, 0, FALSE);
+ ft = proto_item_add_subtree(fi, ett_ipv6_fragments);
+ for (ipfd = ipfd_head->next; ipfd; ipfd = ipfd->next){
+ if (ipfd->flags & (FD_OVERLAP|FD_OVERLAPCONFLICT
+ |FD_MULTIPLETAILS|FD_TOOLONGFRAGMENT) ) {
+ /* this fragment has some flags set, create a subtree
+ * for it and display the flags.
+ */
+ proto_tree *fet = NULL;
+ proto_item *fei = NULL;
+ int hf;
-#define SPRINTF(x) ((size_t)sprintf x)
+ if (ipfd->flags & (FD_OVERLAPCONFLICT
+ |FD_MULTIPLETAILS|FD_TOOLONGFRAGMENT) ) {
+ hf = hf_ipv6_fragment_error;
+ } else {
+ hf = hf_ipv6_fragment;
+ }
+ fei = proto_tree_add_none_format(ft, hf,
+ tvb, 0, 0,
+ "Frame:%u payload:%u-%u",
+ ipfd->frame,
+ ipfd->offset,
+ ipfd->offset+ipfd->len-1
+ );
+ fet = proto_item_add_subtree(fei, ett_ipv6_fragment);
+ if (ipfd->flags&FD_OVERLAP) {
+ proto_tree_add_boolean(fet,
+ hf_ipv6_fragment_overlap, tvb, 0, 0,
+ TRUE);
+ }
+ if (ipfd->flags&FD_OVERLAPCONFLICT) {
+ proto_tree_add_boolean(fet,
+ hf_ipv6_fragment_overlap_conflict, tvb, 0, 0,
+ TRUE);
+ }
+ if (ipfd->flags&FD_MULTIPLETAILS) {
+ proto_tree_add_boolean(fet,
+ hf_ipv6_fragment_multiple_tails, tvb, 0, 0,
+ TRUE);
+ }
+ if (ipfd->flags&FD_TOOLONGFRAGMENT) {
+ proto_tree_add_boolean(fet,
+ hf_ipv6_fragment_too_long_fragment, tvb, 0, 0,
+ TRUE);
+ }
+ } else {
+ /* nothing of interest for this fragment */
+ proto_tree_add_none_format(ft, hf_ipv6_fragment,
+ tvb, 0, 0,
+ "Frame:%u payload:%u-%u",
+ ipfd->frame,
+ ipfd->offset,
+ ipfd->offset+ipfd->len-1
+ );
+ }
+ }
+ if (ipfd_head->flags & (FD_OVERLAPCONFLICT
+ |FD_MULTIPLETAILS|FD_TOOLONGFRAGMENT) ) {
+ if (check_col(pinfo->cinfo, COL_INFO)) {
+ col_set_str(pinfo->cinfo, COL_INFO, "[Illegal fragments]");
+ update_col_info = FALSE;
+ }
+ }
-/*
- * Copyright (c) 1996-1999 by Internet Software Consortium.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
- * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
- * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
- * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
- * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- * SOFTWARE.
- */
+ /* Allocate a new tvbuff, referring to the reassembled payload. */
+ next_tvb = tvb_new_real_data(ipfd_head->data, ipfd_head->datalen,
+ ipfd_head->datalen);
-/* const char *
- * inet_ntop4(src, dst, size)
- * format an IPv4 address
- * return:
- * `dst' (as a const)
- * notes:
- * (1) uses no statics
- * (2) takes a u_char* not an in_addr as input
- * author:
- * Paul Vixie, 1996.
- */
-static const char *
-inet_ntop4(src, dst, size)
- const u_char *src;
- char *dst;
- size_t size;
-{
- static const char fmt[] = "%u.%u.%u.%u";
- char tmp[sizeof "255.255.255.255"];
+ /* Add the tvbuff to the list of tvbuffs to which the tvbuff we
+ were handed refers, so it'll get cleaned up when that tvbuff
+ is cleaned up. */
+ tvb_set_child_real_data_tvbuff(tvb, next_tvb);
- if (SPRINTF((tmp, fmt, src[0], src[1], src[2], src[3])) > size) {
- return (NULL);
- }
- strcpy(dst, tmp);
- return (dst);
+ /* Add the defragmented data to the data source list. */
+ add_new_data_source(pinfo->fd, next_tvb, "Reassembled IPv6");
+
+ /* It's not fragmented. */
+ pinfo->fragmented = FALSE;
+ } else {
+ /* We don't have the complete reassembled payload. */
+ next_tvb = NULL;
+ }
+ } else {
+ /* If this is the first fragment, dissect its contents, otherwise
+ just show it as a fragment.
+
+ XXX - if we eventually don't save the reassembled contents of all
+ fragmented datagrams, we may want to always reassemble. */
+ if (offlg & IP6F_OFF_MASK) {
+ /* Not the first fragment - don't dissect it. */
+ next_tvb = NULL;
+ } else {
+ /* First fragment, or not fragmented. Dissect what we have here. */
+
+ /* Get a tvbuff for the payload. */
+ next_tvb = tvb_new_subset(tvb, offset, -1, -1);
+
+ /*
+ * If this is the first fragment, but not the only fragment,
+ * tell the next protocol that.
+ */
+ if (offlg & IP6F_MORE_FRAG)
+ pinfo->fragmented = TRUE;
+ else
+ pinfo->fragmented = FALSE;
+ }
+ }
+
+ if (next_tvb == NULL) {
+ /* Just show this as a fragment. */
+ /* COL_INFO was filled in by "dissect_frag6()" */
+ call_dissector(data_handle,tvb_new_subset(tvb, offset, -1,tvb_reported_length_remaining(tvb,offset)),pinfo, tree);
+
+ /* As we haven't reassembled anything, we haven't changed "pi", so
+ we don't have to restore it. */
+ pinfo->fragmented = save_fragmented;
+ return;
+ }
+
+ /* do lookup with the subdissector table */
+ if (!dissector_try_port(ip_dissector_table, nxt, next_tvb, pinfo, tree)) {
+ /* Unknown protocol */
+ if (check_col(pinfo->cinfo, COL_INFO))
+ col_add_fstr(pinfo->cinfo, COL_INFO, "%s (0x%02x)", ipprotostr(nxt),nxt);
+ call_dissector(data_handle,next_tvb, pinfo, tree);
+ }
+ pinfo->fragmented = save_fragmented;
}
-/* const char *
- * inet_ntop6(src, dst, size)
- * convert IPv6 binary address into presentation (printable) format
- * author:
- * Paul Vixie, 1996.
- */
-static const char *
-inet_ntop6(src, dst, size)
- const u_char *src;
- char *dst;
- size_t size;
+static void
+dissect_ipv6_none(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
- /*
- * Note that int32_t and int16_t need only be "at least" large enough
- * to contain a value of the specified size. On some systems, like
- * Crays, there is no such thing as an integer variable with 16 bits.
- * Keep this in mind if you think this function should have been coded
- * to use pointer overlays. All the world's not a VAX.
- */
- char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"], *tp;
- struct { int base, len; } best, cur;
- u_int words[NS_IN6ADDRSZ / NS_INT16SZ];
- int i;
-
- /*
- * Preprocess:
- * Copy the input (bytewise) array into a wordwise array.
- * Find the longest run of 0x00's in src[] for :: shorthanding.
- */
- memset(words, '\0', sizeof words);
- for (i = 0; i < NS_IN6ADDRSZ; i++)
- words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3));
- best.base = -1;
- cur.base = -1;
- for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++) {
- if (words[i] == 0) {
- if (cur.base == -1)
- cur.base = i, cur.len = 1;
- else
- cur.len++;
- } else {
- if (cur.base != -1) {
- if (best.base == -1 || cur.len > best.len)
- best = cur;
- cur.base = -1;
- }
- }
- }
- if (cur.base != -1) {
- if (best.base == -1 || cur.len > best.len)
- best = cur;
- }
- if (best.base != -1 && best.len < 2)
- best.base = -1;
-
- /*
- * Format the result.
- */
- tp = tmp;
- for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++) {
- /* Are we inside the best run of 0x00's? */
- if (best.base != -1 && i >= best.base &&
- i < (best.base + best.len)) {
- if (i == best.base)
- *tp++ = ':';
- continue;
- }
- /* Are we following an initial run of 0x00s or any real hex? */
- if (i != 0)
- *tp++ = ':';
- /* Is this address an encapsulated IPv4? */
- if (i == 6 && best.base == 0 &&
- (best.len == 6 || (best.len == 5 && words[5] == 0xffff))) {
- if (!inet_ntop4(src+12, tp, sizeof tmp - (tp - tmp)))
- return (NULL);
- tp += strlen(tp);
- break;
- }
- tp += SPRINTF((tp, "%x", words[i]));
- }
- /* Was it a trailing run of 0x00's? */
- if (best.base != -1 && (best.base + best.len) ==
- (NS_IN6ADDRSZ / NS_INT16SZ))
- *tp++ = ':';
- *tp++ = '\0';
-
- /*
- * Check for overflow, copy, and we're done.
- */
- if ((size_t)(tp - tmp) > size) {
- return (NULL);
- }
- strcpy(dst, tmp);
- return (dst);
+ if (hf_ipv6_mipv6_length != -1) {
+ if (check_col(pinfo->cinfo, COL_INFO))
+ col_add_fstr(pinfo->cinfo, COL_INFO, "Mobile IPv6 Destination Option");
+ } else {
+ if (check_col(pinfo->cinfo, COL_INFO))
+ col_add_fstr(pinfo->cinfo, COL_INFO, "IPv6 no next header");
+ }
+ /* XXX - dissect the payload as padding? */
}
void
proto_register_ipv6(void)
{
static hf_register_info hf[] = {
+ { &hf_ipv6_version,
+ { "Version", "ipv6.version",
+ FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
+ { &hf_ipv6_class,
+ { "Traffic class", "ipv6.class",
+ FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
+ { &hf_ipv6_flow,
+ { "Flowlabel", "ipv6.flow",
+ FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL }},
+ { &hf_ipv6_plen,
+ { "Payload length", "ipv6.plen",
+ FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
+ { &hf_ipv6_nxt,
+ { "Next header", "ipv6.nxt",
+ FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
+ { &hf_ipv6_hlim,
+ { "Hop limit", "ipv6.hlim",
+ FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_ipv6_src,
- { "Source", "ipv6.src", FT_IPv6, BASE_NONE, NULL, 0x0,
- "Source IPv6 Address" }},
+ { "Source", "ipv6.src",
+ FT_IPv6, BASE_NONE, NULL, 0x0,
+ "Source IPv6 Address", HFILL }},
{ &hf_ipv6_dst,
- { "Destination", "ipv6.dst", FT_IPv6, BASE_NONE, NULL, 0x0,
- "Destination IPv6 Address" }}
+ { "Destination", "ipv6.dst",
+ FT_IPv6, BASE_NONE, NULL, 0x0,
+ "Destination IPv6 Address", HFILL }},
+ { &hf_ipv6_addr,
+ { "Address", "ipv6.addr",
+ FT_IPv6, BASE_NONE, NULL, 0x0,
+ "Source or Destination IPv6 Address", HFILL }},
+
+ { &hf_ipv6_fragment_overlap,
+ { "Fragment overlap", "ipv6.fragment.overlap",
+ FT_BOOLEAN, BASE_NONE, NULL, 0x0,
+ "Fragment overlaps with other fragments", HFILL }},
+
+ { &hf_ipv6_fragment_overlap_conflict,
+ { "Conflicting data in fragment overlap", "ipv6.fragment.overlap.conflict",
+ FT_BOOLEAN, BASE_NONE, NULL, 0x0,
+ "Overlapping fragments contained conflicting data", HFILL }},
+
+ { &hf_ipv6_fragment_multiple_tails,
+ { "Multiple tail fragments found", "ipv6.fragment.multipletails",
+ FT_BOOLEAN, BASE_NONE, NULL, 0x0,
+ "Several tails were found when defragmenting the packet", HFILL }},
+
+ { &hf_ipv6_fragment_too_long_fragment,
+ { "Fragment too long", "ipv6.fragment.toolongfragment",
+ FT_BOOLEAN, BASE_NONE, NULL, 0x0,
+ "Fragment contained data past end of packet", HFILL }},
+
+ { &hf_ipv6_fragment_error,
+ { "Defragmentation error", "ipv6.fragment.error",
+ FT_NONE, BASE_NONE, NULL, 0x0,
+ "Defragmentation error due to illegal fragments", HFILL }},
+
+ { &hf_ipv6_fragment,
+ { "IPv6 Fragment", "ipv6.fragment",
+ FT_NONE, BASE_NONE, NULL, 0x0,
+ "IPv6 Fragment", HFILL }},
+
+ { &hf_ipv6_fragments,
+ { "IPv6 Fragments", "ipv6.fragments",
+ FT_NONE, BASE_NONE, NULL, 0x0,
+ "IPv6 Fragments", HFILL }},
+
+ /* BT INSERT BEGIN */
+ { &hf_ipv6_mipv6_type,
+ { "Option Type ", "ipv6.mipv6_type",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_length,
+ { "Option Length ", "ipv6.mipv6_length",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_a_flag,
+ { "Acknowledge (A) ", "ipv6.mipv6_a_flag",
+ FT_BOOLEAN, 8, TFS(&ipv6_mipv6_bu_a_flag_value),
+ IP6_MIPv6_BU_A_FLAG,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_h_flag,
+ { "Home Registration (H) ", "ipv6.mipv6_h_flag",
+ FT_BOOLEAN, 8, TFS(&ipv6_mipv6_bu_h_flag_value),
+ IP6_MIPv6_BU_H_FLAG,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_r_flag,
+ { "Router (R) ", "ipv6.mipv6_r_flag",
+ FT_BOOLEAN, 8, TFS(&ipv6_mipv6_bu_r_flag_value),
+ IP6_MIPv6_BU_R_FLAG,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_d_flag,
+ { "Duplicate Address Detection (D) ", "ipv6.mipv6_d_flag",
+ FT_BOOLEAN, 8, TFS(&ipv6_mipv6_bu_d_flag_value),
+ IP6_MIPv6_BU_D_FLAG,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_m_flag,
+ { "MAP Registration (M) ", "ipv6.mipv6_m_flag",
+ FT_BOOLEAN, 8, TFS(&ipv6_mipv6_bu_m_flag_value),
+ IP6_MIPv6_BU_M_FLAG,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_b_flag,
+ { "Bicasting all (B) ", "ipv6.mipv6_b_flag",
+ FT_BOOLEAN, 8, TFS(&ipv6_mipv6_bu_b_flag_value),
+ IP6_MIPv6_BU_B_FLAG,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_prefix_length,
+ { "Prefix Length ", "ipv6.mipv6_prefix_length",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_sequence_number,
+ { "Sequence Number ", "ipv6.mipv6_sequence_number",
+ FT_UINT16, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_life_time,
+ { "Life Time ", "ipv6.mipv6_life_time",
+ FT_UINT32, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_status,
+ { "Status ", "ipv6.mipv6_status",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_refresh,
+ { "Refresh ", "ipv6.mipv6_refresh",
+ FT_UINT32, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_home_address,
+ { "Home Address ", "ipv6.mipv6_home_address",
+ FT_IPv6, BASE_HEX, NULL, 0x0,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_sub_type,
+ { "Sub-Option Type ", "ipv6.mipv6_sub_type",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_sub_length,
+ { "Sub-Option Length ", "ipv6.mipv6_sub_length",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_sub_unique_ID,
+ { "Unique Identifier ", "ipv6.mipv6_sub_unique_ID",
+ FT_UINT16, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_ipv6_mipv6_sub_alternative_COA,
+ { "Alternative Care of Address ", "ipv6.mipv6_sub_alternative_COA",
+ FT_IPv6, BASE_HEX, NULL, 0x0,
+ "", HFILL }},
+
+ /* BT INSERT END */
+#ifdef TEST_FINALHDR
+ { &hf_ipv6_final,
+ { "Final next header", "ipv6.final",
+ FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
+#endif
+ };
+ static gint *ett[] = {
+ &ett_ipv6,
+ &ett_ipv6_fragments,
+ &ett_ipv6_fragment,
};
+ module_t *ipv6_module;
- proto_ipv6 = proto_register_protocol("Internet Protocol Version 6", "ipv6");
+ proto_ipv6 = proto_register_protocol("Internet Protocol Version 6", "IPv6", "ipv6");
proto_register_field_array(proto_ipv6, hf, array_length(hf));
+ proto_register_subtree_array(ett, array_length(ett));
+
+ /* Register configuration options */
+ ipv6_module = prefs_register_protocol(proto_ipv6, NULL);
+ prefs_register_bool_preference(ipv6_module, "defragment",
+ "Reassemble fragmented IPv6 datagrams",
+ "Whether fragmented IPv6 datagrams should be reassembled",
+ &ipv6_reassemble);
+
+ register_dissector("ipv6", dissect_ipv6, proto_ipv6);
+ register_init_routine(ipv6_reassemble_init);
+}
+
+void
+proto_reg_handoff_ipv6(void)
+{
+ dissector_handle_t ipv6_handle, ipv6_none_handle;
+
+ data_handle = find_dissector("data");
+ ipv6_handle = find_dissector("ipv6");
+ dissector_add("ethertype", ETHERTYPE_IPv6, ipv6_handle);
+ dissector_add("ppp.protocol", PPP_IPV6, ipv6_handle);
+ dissector_add("ppp.protocol", ETHERTYPE_IPv6, ipv6_handle);
+ dissector_add("gre.proto", ETHERTYPE_IPv6, ipv6_handle);
+ dissector_add("ip.proto", IP_PROTO_IPV6, ipv6_handle);
+ ipv6_none_handle = create_dissector_handle(dissect_ipv6_none, proto_ipv6);
+ dissector_add("ip.proto", IP_PROTO_NONE, ipv6_none_handle);
+ dissector_add("null.type", BSD_AF_INET6_BSD, ipv6_handle);
+ dissector_add("null.type", BSD_AF_INET6_FREEBSD, ipv6_handle);
+ dissector_add("chdlctype", ETHERTYPE_IPv6, ipv6_handle);
+ dissector_add("fr.ietf", NLPID_IP6, ipv6_handle);
+ dissector_add("x.25.spi", NLPID_IP6, ipv6_handle);
}
git.samba.org / obnox / wireshark / wip.git / blobdiff