/* packet-aodv6.c * Routines for AODV6 dissection * Copyright 2002, Antti J. Tuominen * Loosely based on packet-aodv.c. * * $Id: packet-aodv6.c,v 1.2 2002/08/02 23:35:47 jmayer Exp $ * * Ethereal - Network traffic analyzer * By Gerald Combs * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #ifndef offsetof #define offsetof(type, member) ((size_t)(&((type *)0)->member)) #endif #define INET6_ADDRLEN 16 #define UDP_PORT_AODV6 654 /* Message Types */ #define AODV6_RREQ 16 #define AODV6_RREP 17 #define AODV6_RERR 18 #define AODV6_RREP_ACK 19 /* Extension Types */ #define AODV6_EXT 1 #define AODV6_EXT_INT 2 #define AODV6_EXT_NTP 3 /* Flag bits: */ #define RREQ_GRAT 0x20 #define RREQ_REP 0x40 #define RREQ_JOIN 0x80 #define RREP_ACK 0x40 #define RREP_REP 0x80 #define RERR_NODEL 0x80 static const true_false_string flags_set_truth = { "Set", "Not set" }; static const value_string type_vals[] = { {AODV6_RREQ, "Route Request"}, {AODV6_RREP, "Route Reply"}, {AODV6_RERR, "Route Error"}, {AODV6_RREP_ACK, "Route Reply Acknowledgment"}, {0, NULL} }; static const value_string exttype_vals[] = { {AODV6_EXT, "None"}, {AODV6_EXT_INT, "Hello Interval"}, {AODV6_EXT_NTP, "Timestamp"}, {0, NULL} }; typedef struct aodv6_rreq { guint8 type; guint8 flags; guint8 res; guint8 hop_count; guint32 rreq_id; guint32 dest_seqno; guint32 orig_seqno; struct e_in6_addr dest_addr; struct e_in6_addr orig_addr; } rreq_t; typedef struct aodv6_rrep { guint8 type; guint8 flags; guint8 res2:1; guint8 prefix:7; guint8 hop_count; guint32 dest_seqno; struct e_in6_addr dest_addr; struct e_in6_addr orig_addr; guint32 lifetime; } rrep_t; typedef struct aodv6_rerr { guint8 type; guint8 flags; guint8 res; guint8 dest_count; guint32 dest_seqno; struct e_in6_addr dest_addr; } rerr_t; typedef struct aodv6_rrep_ack { guint8 type; guint8 res; } rrep_ack_t; typedef struct aodv6_ext { guint8 type; guint8 length; } ext_t; static rreq_t rreq; static rrep_t rrep; static rerr_t rerr; /* Initialize the protocol and registered fields */ static int proto_aodv6 = -1; static int hf_aodv6_type = -1; static int hf_aodv6_flags = -1; static int hf_aodv6_hopcount = -1; static int hf_aodv6_rreq_id = -1; static int hf_aodv6_dest_ip = -1; static int hf_aodv6_dest_seqno = -1; static int hf_aodv6_orig_ip = -1; static int hf_aodv6_orig_seqno = -1; static int hf_aodv6_lifetime = -1; static int hf_aodv6_destcount = -1; static int hf_aodv6_unreach_dest_ip = -1; static int hf_aodv6_unreach_dest_seqno = -1; static int hf_aodv6_flags_rreq_join = -1; static int hf_aodv6_flags_rreq_repair = -1; static int hf_aodv6_flags_rreq_gratuitous = -1; static int hf_aodv6_flags_rrep_repair = -1; static int hf_aodv6_flags_rrep_ack = -1; static int hf_aodv6_flags_rerr_nodelete = -1; static int hf_aodv6_ext_type = -1; static int hf_aodv6_ext_length = -1; static int hf_aodv6_ext_interval = -1; static int hf_aodv6_ext_timestamp = -1; /* Initialize the subtree pointers */ static gint ett_aodv6 = -1; static gint ett_aodv6_flags = -1; static gint ett_aodv6_unreach_dest = -1; static gint ett_aodv6_extensions = -1; static void dissect_aodv6ext(tvbuff_t * tvb, int offset, proto_tree * tree) { proto_tree *aodv6ext_tree; proto_item *ti; ext_t aodv6ext, *ext; char *typename; int len; if (!tree) return; again: if ((int) tvb_reported_length(tvb) <= offset) return; /* No more options left */ ext = &aodv6ext; tvb_memcpy(tvb, (guint8 *) ext, offset, sizeof(*ext)); len = ext->length; ti = proto_tree_add_text(tree, tvb, offset, sizeof(ext_t) + len, "AODV6 Extensions"); aodv6ext_tree = proto_item_add_subtree(ti, ett_aodv6_extensions); if (len == 0) { proto_tree_add_text(aodv6ext_tree, tvb, offset + offsetof(ext_t, length), 1, "Invalid option length: %u", ext->length); return; /* we must not try to decode this */ } switch (ext->type) { case AODV6_EXT_INT: typename = "Hello Interval"; break; case AODV6_EXT_NTP: typename = "Timestamp"; break; default: typename = "Unknown"; break; } proto_tree_add_text(aodv6ext_tree, tvb, offset + offsetof(ext_t, type), 1, "Type: %u (%s)", ext->type, typename); proto_tree_add_text(aodv6ext_tree, tvb, offset + offsetof(ext_t, length), 1, "Length: %u bytes", ext->length); offset += sizeof(ext_t); switch (ext->type) { case AODV6_EXT_INT: proto_tree_add_uint(aodv6ext_tree, hf_aodv6_ext_interval, tvb, offset, 4, tvb_get_ntohl(tvb, offset)); break; case AODV6_EXT_NTP: proto_tree_add_item(aodv6ext_tree, hf_aodv6_ext_timestamp, tvb, offset, 8, FALSE); break; default: break; } /* If multifield extensions appear, we need more * sophisticated handler. For now, this is okay. */ offset += ext->length; goto again; } static int dissect_aodv6(tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree) { proto_item *ti = NULL, *tj = NULL, *tk = NULL; proto_tree *aodv6_tree = NULL, *aodv6_flags_tree = NULL, *aodv6_unreach_dest_tree = NULL; guint8 type; int i, extlen; /* Make entries in Protocol column and Info column on summary * display */ if (check_col(pinfo->cinfo, COL_PROTOCOL)) col_set_str(pinfo->cinfo, COL_PROTOCOL, "AODV6"); if (check_col(pinfo->cinfo, COL_INFO)) col_clear(pinfo->cinfo, COL_INFO); /* Check the type of AODV6 packet. */ type = tvb_get_guint8(tvb, 0); if (type < AODV6_RREQ || type > AODV6_RREP_ACK) { return 0; /* don't process */ } if (tree) { ti = proto_tree_add_protocol_format(tree, proto_aodv6, tvb, 0, -1, "Ad hoc On-demand Distance Vector v6, %s", val_to_str(type, type_vals, "Unknown AODV6 Packet Type (%u)")); aodv6_tree = proto_item_add_subtree(ti, ett_aodv6); proto_tree_add_uint(aodv6_tree, hf_aodv6_type, tvb, 0, 1, type); tj = proto_tree_add_text(aodv6_tree, tvb, 1, 1, "Flags:"); aodv6_flags_tree = proto_item_add_subtree(tj, ett_aodv6_flags); } switch (type) { case AODV6_RREQ: rreq.type = type; rreq.flags = tvb_get_guint8(tvb, offsetof(rreq_t, flags)); rreq.hop_count = tvb_get_guint8(tvb, offsetof(rreq_t, hop_count)); rreq.rreq_id = tvb_get_ntohl(tvb, offsetof(rreq_t, rreq_id)); rreq.dest_seqno = tvb_get_ntohl(tvb, offsetof(rreq_t, dest_seqno)); rreq.orig_seqno = tvb_get_ntohl(tvb, offsetof(rreq_t, orig_seqno)); tvb_memcpy(tvb, (guint8 *) & rreq.dest_addr, offsetof(rreq_t, dest_addr), INET6_ADDRLEN); tvb_memcpy(tvb, (guint8 *) & rreq.orig_addr, offsetof(rreq_t, orig_addr), INET6_ADDRLEN); if (tree) { proto_tree_add_boolean(aodv6_flags_tree, hf_aodv6_flags_rreq_join, tvb, offsetof(rreq_t, flags), 1, rreq.flags); proto_tree_add_boolean(aodv6_flags_tree, hf_aodv6_flags_rreq_repair, tvb, offsetof(rreq_t, flags), 1, rreq.flags); proto_tree_add_boolean(aodv6_flags_tree, hf_aodv6_flags_rreq_gratuitous, tvb, offsetof(rreq_t, flags), 1, rreq.flags); if (rreq.flags & RREQ_JOIN) proto_item_append_text(tj, " J"); if (rreq.flags & RREQ_REP) proto_item_append_text(tj, " R"); if (rreq.flags & RREQ_GRAT) proto_item_append_text(tj, " G"); proto_tree_add_uint(aodv6_tree, hf_aodv6_hopcount, tvb, offsetof(rreq_t, hop_count), 1, rreq.hop_count); proto_tree_add_uint(aodv6_tree, hf_aodv6_rreq_id, tvb, offsetof(rreq_t, rreq_id), 4, rreq.rreq_id); proto_tree_add_uint(aodv6_tree, hf_aodv6_dest_seqno, tvb, offsetof(rreq_t, dest_seqno), 4, rreq.dest_seqno); proto_tree_add_uint(aodv6_tree, hf_aodv6_orig_seqno, tvb, offsetof(rreq_t, orig_seqno), 4, rreq.orig_seqno); proto_tree_add_ipv6(aodv6_tree, hf_aodv6_dest_ip, tvb, offsetof(rreq_t, dest_addr), INET6_ADDRLEN, (guint8 *) & rreq.dest_addr); proto_tree_add_ipv6(aodv6_tree, hf_aodv6_orig_ip, tvb, offsetof(rreq_t, orig_addr), INET6_ADDRLEN, (guint8 *) & rreq.orig_addr); proto_item_append_text(ti, ", Dest IP: %s, Orig IP: %s, Id=%u", ip6_to_str(&rreq.dest_addr), ip6_to_str(&rreq.orig_addr), rreq.rreq_id); extlen = ((int) tvb_reported_length(tvb) - sizeof(rreq_t)); if (extlen > 0) { dissect_aodv6ext(tvb, sizeof(rreq_t), aodv6_tree); } } if (check_col(pinfo->cinfo, COL_INFO)) col_add_fstr(pinfo->cinfo, COL_INFO, "%s, D: %s O: %s Id=%u Hcnt=%u DSN=%u OSN=%u", val_to_str(type, type_vals, "Unknown AODV6 Packet Type (%u)"), ip6_to_str(&rreq.dest_addr), ip6_to_str(&rreq.orig_addr), rreq.rreq_id, rreq.hop_count, rreq.dest_seqno, rreq.orig_seqno); break; case AODV6_RREP: rrep.type = type; rrep.flags = tvb_get_guint8(tvb, offsetof(rrep_t, flags)); rrep.hop_count = tvb_get_guint8(tvb, offsetof(rrep_t, hop_count)); rrep.dest_seqno = tvb_get_ntohl(tvb, offsetof(rrep_t, dest_seqno)); tvb_memcpy(tvb, (guint8 *) & rrep.dest_addr, offsetof(rrep_t, dest_addr), INET6_ADDRLEN); tvb_memcpy(tvb, (guint8 *) & rrep.orig_addr, offsetof(rrep_t, orig_addr), INET6_ADDRLEN); rrep.lifetime = tvb_get_ntohl(tvb, offsetof(rrep_t, lifetime)); if (tree) { proto_tree_add_boolean(aodv6_flags_tree, hf_aodv6_flags_rrep_repair, tvb, offsetof(rrep_t, flags), 1, rrep.flags); proto_tree_add_boolean(aodv6_flags_tree, hf_aodv6_flags_rrep_ack, tvb, offsetof(rrep_t, flags), 1, rrep.flags); if (rrep.flags & RREP_REP) proto_item_append_text(tj, " R"); if (rrep.flags & RREP_ACK) proto_item_append_text(tj, " A"); proto_tree_add_uint(aodv6_tree, hf_aodv6_hopcount, tvb, offsetof(rrep_t, hop_count), 1, rrep.hop_count); proto_tree_add_uint(aodv6_tree, hf_aodv6_dest_seqno, tvb, offsetof(rrep_t, dest_seqno), 4, rrep.dest_seqno); proto_tree_add_ipv6(aodv6_tree, hf_aodv6_dest_ip, tvb, offsetof(rrep_t, dest_addr), INET6_ADDRLEN, (guint8 *) & rrep.dest_addr); proto_tree_add_ipv6(aodv6_tree, hf_aodv6_orig_ip, tvb, offsetof(rrep_t, orig_addr), INET6_ADDRLEN, (guint8 *) & rrep.orig_addr); proto_tree_add_uint(aodv6_tree, hf_aodv6_lifetime, tvb, offsetof(rrep_t, lifetime), 4, rrep.lifetime); proto_item_append_text(ti, ", Dest IP: %s, Orig IP: %s, Lifetime=%u", ip6_to_str(&rrep.dest_addr), ip6_to_str(&rrep.orig_addr), rrep.lifetime); extlen = ((int) tvb_reported_length(tvb) - sizeof(rrep_t)); if (extlen > 0) { dissect_aodv6ext(tvb, sizeof(rrep_t), aodv6_tree); } } if (check_col(pinfo->cinfo, COL_INFO)) col_add_fstr(pinfo->cinfo, COL_INFO, "%s D: %s O: %s Hcnt=%u DSN=%u Lifetime=%u", val_to_str(type, type_vals, "Unknown AODV6 Packet Type (%u)"), ip6_to_str(&rrep.dest_addr), ip6_to_str(&rrep.orig_addr), rrep.hop_count, rrep.dest_seqno, rrep.lifetime); break; case AODV6_RERR: rerr.type = type; rerr.flags = tvb_get_guint8(tvb, offsetof(rerr_t, flags)); rerr.dest_count = tvb_get_guint8(tvb, offsetof(rerr_t, dest_count)); if (tree) { proto_tree_add_boolean(aodv6_flags_tree, hf_aodv6_flags_rerr_nodelete, tvb, offsetof(rerr_t, flags), 1, rerr.flags); if (rerr.flags & RERR_NODEL) proto_item_append_text(tj, " N"); proto_tree_add_uint(aodv6_tree, hf_aodv6_destcount, tvb, offsetof(rerr_t, dest_count), 1, rerr.dest_count); tk = proto_tree_add_text(aodv6_tree, tvb, offsetof(rerr_t, dest_addr), (4 + INET6_ADDRLEN) * rerr.dest_count, "Unreachable Destinations"); aodv6_unreach_dest_tree = proto_item_add_subtree(tk, ett_aodv6_unreach_dest); for (i = 0; i < rerr.dest_count; i++) { rerr.dest_seqno = tvb_get_ntohl(tvb, offsetof(rerr_t, dest_seqno) + (4 + INET6_ADDRLEN) * i); tvb_memcpy(tvb, (guint8 *) & rerr.dest_addr, offsetof(rerr_t, dest_addr) + (4 + INET6_ADDRLEN) * i, INET6_ADDRLEN); proto_tree_add_uint(aodv6_unreach_dest_tree, hf_aodv6_dest_seqno, tvb, offsetof(rerr_t, dest_seqno) + (4 + INET6_ADDRLEN) * i, 4, rerr.dest_seqno); proto_tree_add_ipv6(aodv6_unreach_dest_tree, hf_aodv6_dest_ip, tvb, offsetof(rerr_t, dest_addr) + (4 + INET6_ADDRLEN) * i, INET6_ADDRLEN, (guint8 *) & rerr.dest_addr); } } if (check_col(pinfo->cinfo, COL_INFO)) col_add_fstr(pinfo->cinfo, COL_INFO, "%s, Dest Count=%u", val_to_str(type, type_vals, "Unknown AODV6 Packet Type (%u)"), rerr.dest_count); break; case AODV6_RREP_ACK: if (check_col(pinfo->cinfo, COL_INFO)) col_add_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str(type, type_vals, "Unknown AODV6 Packet Type (%u)")); break; default: proto_tree_add_text(aodv6_tree, tvb, 0, 1, "Unknown AODV6 Packet Type (%u)", type); } return tvb_length(tvb); } /* Register the protocol with Ethereal */ void proto_register_aodv6(void) { static hf_register_info hf[] = { {&hf_aodv6_type, {"Type", "aodv6.type", FT_UINT8, BASE_DEC, VALS(type_vals), 0x0, "AODV6 packet type", HFILL} }, {&hf_aodv6_flags, {"Flags", "aodv6.flags", FT_UINT16, BASE_DEC, NULL, 0x0, "Flags", HFILL} }, {&hf_aodv6_flags_rreq_join, {"RREQ Join", "aodv6.flags.rreq_join", FT_BOOLEAN, 8, TFS(&flags_set_truth), RREQ_JOIN, "", HFILL} }, {&hf_aodv6_flags_rreq_repair, {"RREQ Repair", "aodv6.flags.rreq_repair", FT_BOOLEAN, 8, TFS(&flags_set_truth), RREQ_REP, "", HFILL} }, {&hf_aodv6_flags_rreq_gratuitous, {"RREQ Gratuitous", "aodv6.flags.rreq_gratuitous", FT_BOOLEAN, 8, TFS(&flags_set_truth), RREQ_GRAT, "", HFILL} }, {&hf_aodv6_flags_rrep_repair, {"RREP Repair", "aodv6.flags.rrep_repair", FT_BOOLEAN, 8, TFS(&flags_set_truth), RREP_REP, "", HFILL} }, {&hf_aodv6_flags_rrep_ack, {"RREP Acknowledgment", "aodv6.flags.rrep_ack", FT_BOOLEAN, 8, TFS(&flags_set_truth), RREP_ACK, "", HFILL} }, {&hf_aodv6_flags_rerr_nodelete, {"RERR No Delete", "aodv6.flags.rerr_nodelete", FT_BOOLEAN, 8, TFS(&flags_set_truth), RERR_NODEL, "", HFILL} }, {&hf_aodv6_hopcount, {"Hop Count", "aodv6.hopcount", FT_UINT8, BASE_DEC, NULL, 0x0, "Hop Count", HFILL} }, {&hf_aodv6_rreq_id, {"RREQ ID", "aodv6.rreq_id", FT_UINT32, BASE_DEC, NULL, 0x0, "RREQ ID", HFILL} }, {&hf_aodv6_dest_seqno, {"Destination Sequence Number", "aodv6.dest_seqno", FT_UINT32, BASE_DEC, NULL, 0x0, "Destination Sequence Number", HFILL} }, {&hf_aodv6_orig_seqno, {"Originator Sequence Number", "aodv6.orig_seqno", FT_UINT32, BASE_DEC, NULL, 0x0, "Originator Sequence Number", HFILL} }, {&hf_aodv6_dest_ip, {"Destination IP", "aodv6.dest_ip", FT_IPv6, BASE_DEC, NULL, 0x0, "Destination IP Address", HFILL} }, {&hf_aodv6_orig_ip, {"Originator IP", "aodv6.orig_ip", FT_IPv6, BASE_DEC, NULL, 0x0, "Originator IP Address", HFILL} }, {&hf_aodv6_lifetime, {"Lifetime", "aodv6.lifetime", FT_UINT32, BASE_DEC, NULL, 0x0, "Lifetime", HFILL} }, {&hf_aodv6_destcount, {"Destination Count", "aodv6.destcount", FT_UINT8, BASE_DEC, NULL, 0x0, "Unreachable Destinations Count", HFILL} }, {&hf_aodv6_unreach_dest_seqno, {"Unreachable Destination Sequence Number", "aodv6.unreach_dest_seqno", FT_UINT32, BASE_DEC, NULL, 0x0, "Unreachable Destination Sequence Number", HFILL} }, {&hf_aodv6_unreach_dest_ip, {"Unreachable Destination IP", "aodv6.unreach_dest_ip", FT_IPv6, BASE_DEC, NULL, 0x0, "Unreachable Destination IP Address", HFILL} }, {&hf_aodv6_ext_type, {"Extension Type", "aodv6.ext_type", FT_UINT8, BASE_DEC, NULL, 0x0, "Extension Format Type", HFILL} }, {&hf_aodv6_ext_length, {"Extension Length", "aodv6.ext_length", FT_UINT8, BASE_DEC, NULL, 0x0, "Extension Data Length", HFILL} }, {&hf_aodv6_ext_interval, {"Hello Interval", "aodv6.hello_interval", FT_UINT32, BASE_DEC, NULL, 0x0, "Hello Interval Extension", HFILL} }, {&hf_aodv6_ext_timestamp, {"Timestamp", "aodv6.timestamp", FT_UINT64, BASE_DEC, NULL, 0x0, "Timestamp Extension", HFILL} }, }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_aodv6, &ett_aodv6_flags, &ett_aodv6_unreach_dest, &ett_aodv6_extensions, }; /* Register the protocol name and description */ proto_aodv6 = proto_register_protocol ("Ad hoc On-demand Distance Vector Routing Protocol v6", "AODV6", "aodv6"); /* Required function calls to register the header fields and * subtrees */ proto_register_field_array(proto_aodv6, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); } void proto_reg_handoff_aodv6(void) { dissector_handle_t aodv6_handle; aodv6_handle = new_create_dissector_handle(dissect_aodv6, proto_aodv6); dissector_add("udp.port", UDP_PORT_AODV6, aodv6_handle); }