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540 lines
16 KiB
540 lines
16 KiB
/*
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* Copyright (c) 2003 Bruce M. Simpson <bms@spc.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bruce M. Simpson.
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* 4. Neither the name of Bruce M. Simpson nor the names of co-
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Bruce M. Simpson AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Bruce M. Simpson OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/* \summary: Ad hoc On-Demand Distance Vector (AODV) Routing printer */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <netdissect-stdinc.h>
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#include "netdissect.h"
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#include "addrtoname.h"
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#include "extract.h"
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/*
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* RFC 3561
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*/
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struct aodv_rreq {
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uint8_t rreq_type; /* AODV message type (1) */
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uint8_t rreq_flags; /* various flags */
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uint8_t rreq_zero0; /* reserved, set to zero */
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uint8_t rreq_hops; /* number of hops from originator */
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uint32_t rreq_id; /* request ID */
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uint32_t rreq_da; /* destination IPv4 address */
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uint32_t rreq_ds; /* destination sequence number */
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uint32_t rreq_oa; /* originator IPv4 address */
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uint32_t rreq_os; /* originator sequence number */
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};
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struct aodv_rreq6 {
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uint8_t rreq_type; /* AODV message type (1) */
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uint8_t rreq_flags; /* various flags */
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uint8_t rreq_zero0; /* reserved, set to zero */
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uint8_t rreq_hops; /* number of hops from originator */
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uint32_t rreq_id; /* request ID */
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struct in6_addr rreq_da; /* destination IPv6 address */
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uint32_t rreq_ds; /* destination sequence number */
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struct in6_addr rreq_oa; /* originator IPv6 address */
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uint32_t rreq_os; /* originator sequence number */
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};
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struct aodv_rreq6_draft_01 {
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uint8_t rreq_type; /* AODV message type (16) */
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uint8_t rreq_flags; /* various flags */
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uint8_t rreq_zero0; /* reserved, set to zero */
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uint8_t rreq_hops; /* number of hops from originator */
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uint32_t rreq_id; /* request ID */
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uint32_t rreq_ds; /* destination sequence number */
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uint32_t rreq_os; /* originator sequence number */
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struct in6_addr rreq_da; /* destination IPv6 address */
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struct in6_addr rreq_oa; /* originator IPv6 address */
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};
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#define RREQ_JOIN 0x80 /* join (reserved for multicast */
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#define RREQ_REPAIR 0x40 /* repair (reserved for multicast */
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#define RREQ_GRAT 0x20 /* gratuitous RREP */
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#define RREQ_DEST 0x10 /* destination only */
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#define RREQ_UNKNOWN 0x08 /* unknown destination sequence num */
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#define RREQ_FLAGS_MASK 0xF8 /* mask for rreq_flags */
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struct aodv_rrep {
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uint8_t rrep_type; /* AODV message type (2) */
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uint8_t rrep_flags; /* various flags */
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uint8_t rrep_ps; /* prefix size */
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uint8_t rrep_hops; /* number of hops from o to d */
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uint32_t rrep_da; /* destination IPv4 address */
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uint32_t rrep_ds; /* destination sequence number */
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uint32_t rrep_oa; /* originator IPv4 address */
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uint32_t rrep_life; /* lifetime of this route */
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};
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struct aodv_rrep6 {
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uint8_t rrep_type; /* AODV message type (2) */
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uint8_t rrep_flags; /* various flags */
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uint8_t rrep_ps; /* prefix size */
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uint8_t rrep_hops; /* number of hops from o to d */
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struct in6_addr rrep_da; /* destination IPv6 address */
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uint32_t rrep_ds; /* destination sequence number */
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struct in6_addr rrep_oa; /* originator IPv6 address */
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uint32_t rrep_life; /* lifetime of this route */
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};
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struct aodv_rrep6_draft_01 {
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uint8_t rrep_type; /* AODV message type (17) */
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uint8_t rrep_flags; /* various flags */
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uint8_t rrep_ps; /* prefix size */
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uint8_t rrep_hops; /* number of hops from o to d */
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uint32_t rrep_ds; /* destination sequence number */
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struct in6_addr rrep_da; /* destination IPv6 address */
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struct in6_addr rrep_oa; /* originator IPv6 address */
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uint32_t rrep_life; /* lifetime of this route */
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};
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#define RREP_REPAIR 0x80 /* repair (reserved for multicast */
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#define RREP_ACK 0x40 /* acknowledgement required */
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#define RREP_FLAGS_MASK 0xC0 /* mask for rrep_flags */
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#define RREP_PREFIX_MASK 0x1F /* mask for prefix size */
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struct rerr_unreach {
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uint32_t u_da; /* IPv4 address */
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uint32_t u_ds; /* sequence number */
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};
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struct rerr_unreach6 {
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struct in6_addr u_da; /* IPv6 address */
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uint32_t u_ds; /* sequence number */
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};
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struct rerr_unreach6_draft_01 {
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struct in6_addr u_da; /* IPv6 address */
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uint32_t u_ds; /* sequence number */
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};
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struct aodv_rerr {
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uint8_t rerr_type; /* AODV message type (3 or 18) */
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uint8_t rerr_flags; /* various flags */
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uint8_t rerr_zero0; /* reserved, set to zero */
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uint8_t rerr_dc; /* destination count */
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};
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#define RERR_NODELETE 0x80 /* don't delete the link */
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#define RERR_FLAGS_MASK 0x80 /* mask for rerr_flags */
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struct aodv_rrep_ack {
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uint8_t ra_type;
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uint8_t ra_zero0;
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};
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#define AODV_RREQ 1 /* route request */
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#define AODV_RREP 2 /* route response */
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#define AODV_RERR 3 /* error report */
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#define AODV_RREP_ACK 4 /* route response acknowledgement */
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#define AODV_V6_DRAFT_01_RREQ 16 /* IPv6 route request */
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#define AODV_V6_DRAFT_01_RREP 17 /* IPv6 route response */
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#define AODV_V6_DRAFT_01_RERR 18 /* IPv6 error report */
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#define AODV_V6_DRAFT_01_RREP_ACK 19 /* IPV6 route response acknowledgment */
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struct aodv_ext {
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uint8_t type; /* extension type */
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uint8_t length; /* extension length */
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};
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struct aodv_hello {
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struct aodv_ext eh; /* extension header */
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uint8_t interval[4]; /* expect my next hello in
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* (n) ms
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* NOTE: this is not aligned */
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};
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#define AODV_EXT_HELLO 1
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static void
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aodv_extension(netdissect_options *ndo,
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const struct aodv_ext *ep, u_int length)
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{
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const struct aodv_hello *ah;
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ND_TCHECK(*ep);
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switch (ep->type) {
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case AODV_EXT_HELLO:
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ah = (const struct aodv_hello *)(const void *)ep;
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ND_TCHECK(*ah);
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if (length < sizeof(struct aodv_hello))
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goto trunc;
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if (ep->length < 4) {
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ND_PRINT((ndo, "\n\text HELLO - bad length %u", ep->length));
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break;
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}
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ND_PRINT((ndo, "\n\text HELLO %ld ms",
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(unsigned long)EXTRACT_32BITS(&ah->interval)));
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break;
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default:
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ND_PRINT((ndo, "\n\text %u %u", ep->type, ep->length));
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break;
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}
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return;
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trunc:
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ND_PRINT((ndo, " [|hello]"));
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}
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static void
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aodv_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
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{
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u_int i;
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const struct aodv_rreq *ap = (const struct aodv_rreq *)dat;
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ND_TCHECK(*ap);
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if (length < sizeof(*ap))
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goto trunc;
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ND_PRINT((ndo, " rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
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"\tdst %s seq %lu src %s seq %lu", length,
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ap->rreq_type & RREQ_JOIN ? "[J]" : "",
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ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
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ap->rreq_type & RREQ_GRAT ? "[G]" : "",
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ap->rreq_type & RREQ_DEST ? "[D]" : "",
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ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
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ap->rreq_hops,
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(unsigned long)EXTRACT_32BITS(&ap->rreq_id),
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ipaddr_string(ndo, &ap->rreq_da),
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(unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
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ipaddr_string(ndo, &ap->rreq_oa),
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(unsigned long)EXTRACT_32BITS(&ap->rreq_os)));
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i = length - sizeof(*ap);
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if (i >= sizeof(struct aodv_ext))
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aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
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return;
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trunc:
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ND_PRINT((ndo, " [|rreq"));
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}
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static void
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aodv_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
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{
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u_int i;
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const struct aodv_rrep *ap = (const struct aodv_rrep *)dat;
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ND_TCHECK(*ap);
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if (length < sizeof(*ap))
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goto trunc;
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ND_PRINT((ndo, " rrep %u %s%sprefix %u hops %u\n"
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"\tdst %s dseq %lu src %s %lu ms", length,
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ap->rrep_type & RREP_REPAIR ? "[R]" : "",
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ap->rrep_type & RREP_ACK ? "[A] " : " ",
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ap->rrep_ps & RREP_PREFIX_MASK,
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ap->rrep_hops,
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ipaddr_string(ndo, &ap->rrep_da),
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(unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
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ipaddr_string(ndo, &ap->rrep_oa),
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(unsigned long)EXTRACT_32BITS(&ap->rrep_life)));
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i = length - sizeof(*ap);
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if (i >= sizeof(struct aodv_ext))
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aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
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return;
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trunc:
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ND_PRINT((ndo, " [|rreq"));
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}
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static void
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aodv_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
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{
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u_int i, dc;
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const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
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const struct rerr_unreach *dp;
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ND_TCHECK(*ap);
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if (length < sizeof(*ap))
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goto trunc;
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ND_PRINT((ndo, " rerr %s [items %u] [%u]:",
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ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
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ap->rerr_dc, length));
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dp = (const struct rerr_unreach *)(dat + sizeof(*ap));
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i = length - sizeof(*ap);
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for (dc = ap->rerr_dc; dc != 0; dc--) {
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ND_TCHECK(*dp);
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if (i < sizeof(*dp))
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goto trunc;
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ND_PRINT((ndo, " {%s}(%ld)", ipaddr_string(ndo, &dp->u_da),
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(unsigned long)EXTRACT_32BITS(&dp->u_ds)));
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dp++;
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i -= sizeof(*dp);
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}
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return;
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trunc:
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ND_PRINT((ndo, "[|rerr]"));
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}
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static void
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aodv_v6_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
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{
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u_int i;
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const struct aodv_rreq6 *ap = (const struct aodv_rreq6 *)dat;
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ND_TCHECK(*ap);
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if (length < sizeof(*ap))
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goto trunc;
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ND_PRINT((ndo, " v6 rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
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"\tdst %s seq %lu src %s seq %lu", length,
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ap->rreq_type & RREQ_JOIN ? "[J]" : "",
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ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
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ap->rreq_type & RREQ_GRAT ? "[G]" : "",
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ap->rreq_type & RREQ_DEST ? "[D]" : "",
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ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
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ap->rreq_hops,
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(unsigned long)EXTRACT_32BITS(&ap->rreq_id),
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ip6addr_string(ndo, &ap->rreq_da),
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(unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
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ip6addr_string(ndo, &ap->rreq_oa),
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(unsigned long)EXTRACT_32BITS(&ap->rreq_os)));
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i = length - sizeof(*ap);
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if (i >= sizeof(struct aodv_ext))
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aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
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return;
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trunc:
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ND_PRINT((ndo, " [|rreq"));
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}
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static void
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aodv_v6_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
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{
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u_int i;
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const struct aodv_rrep6 *ap = (const struct aodv_rrep6 *)dat;
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ND_TCHECK(*ap);
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if (length < sizeof(*ap))
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goto trunc;
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ND_PRINT((ndo, " rrep %u %s%sprefix %u hops %u\n"
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"\tdst %s dseq %lu src %s %lu ms", length,
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ap->rrep_type & RREP_REPAIR ? "[R]" : "",
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ap->rrep_type & RREP_ACK ? "[A] " : " ",
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ap->rrep_ps & RREP_PREFIX_MASK,
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ap->rrep_hops,
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ip6addr_string(ndo, &ap->rrep_da),
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(unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
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ip6addr_string(ndo, &ap->rrep_oa),
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(unsigned long)EXTRACT_32BITS(&ap->rrep_life)));
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i = length - sizeof(*ap);
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if (i >= sizeof(struct aodv_ext))
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aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
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return;
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|
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trunc:
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ND_PRINT((ndo, " [|rreq"));
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}
|
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|
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static void
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aodv_v6_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
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{
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u_int i, dc;
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const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
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const struct rerr_unreach6 *dp6;
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ND_TCHECK(*ap);
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if (length < sizeof(*ap))
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goto trunc;
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ND_PRINT((ndo, " rerr %s [items %u] [%u]:",
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ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
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ap->rerr_dc, length));
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dp6 = (const struct rerr_unreach6 *)(const void *)(ap + 1);
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i = length - sizeof(*ap);
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for (dc = ap->rerr_dc; dc != 0; dc--) {
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ND_TCHECK(*dp6);
|
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if (i < sizeof(*dp6))
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goto trunc;
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ND_PRINT((ndo, " {%s}(%ld)", ip6addr_string(ndo, &dp6->u_da),
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(unsigned long)EXTRACT_32BITS(&dp6->u_ds)));
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dp6++;
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i -= sizeof(*dp6);
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}
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return;
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|
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trunc:
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ND_PRINT((ndo, "[|rerr]"));
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}
|
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|
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static void
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aodv_v6_draft_01_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
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{
|
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u_int i;
|
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const struct aodv_rreq6_draft_01 *ap = (const struct aodv_rreq6_draft_01 *)dat;
|
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|
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ND_TCHECK(*ap);
|
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if (length < sizeof(*ap))
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goto trunc;
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ND_PRINT((ndo, " rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
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"\tdst %s seq %lu src %s seq %lu", length,
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ap->rreq_type & RREQ_JOIN ? "[J]" : "",
|
|
ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
|
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ap->rreq_type & RREQ_GRAT ? "[G]" : "",
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ap->rreq_type & RREQ_DEST ? "[D]" : "",
|
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ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
|
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ap->rreq_hops,
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(unsigned long)EXTRACT_32BITS(&ap->rreq_id),
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ip6addr_string(ndo, &ap->rreq_da),
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(unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
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ip6addr_string(ndo, &ap->rreq_oa),
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(unsigned long)EXTRACT_32BITS(&ap->rreq_os)));
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i = length - sizeof(*ap);
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if (i >= sizeof(struct aodv_ext))
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aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
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return;
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trunc:
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ND_PRINT((ndo, " [|rreq"));
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}
|
|
|
|
static void
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aodv_v6_draft_01_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
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{
|
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u_int i;
|
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const struct aodv_rrep6_draft_01 *ap = (const struct aodv_rrep6_draft_01 *)dat;
|
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|
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ND_TCHECK(*ap);
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|
if (length < sizeof(*ap))
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|
goto trunc;
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ND_PRINT((ndo, " rrep %u %s%sprefix %u hops %u\n"
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|
"\tdst %s dseq %lu src %s %lu ms", length,
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ap->rrep_type & RREP_REPAIR ? "[R]" : "",
|
|
ap->rrep_type & RREP_ACK ? "[A] " : " ",
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ap->rrep_ps & RREP_PREFIX_MASK,
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ap->rrep_hops,
|
|
ip6addr_string(ndo, &ap->rrep_da),
|
|
(unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
|
|
ip6addr_string(ndo, &ap->rrep_oa),
|
|
(unsigned long)EXTRACT_32BITS(&ap->rrep_life)));
|
|
i = length - sizeof(*ap);
|
|
if (i >= sizeof(struct aodv_ext))
|
|
aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
|
|
return;
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, " [|rreq"));
|
|
}
|
|
|
|
static void
|
|
aodv_v6_draft_01_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
|
|
{
|
|
u_int i, dc;
|
|
const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
|
|
const struct rerr_unreach6_draft_01 *dp6;
|
|
|
|
ND_TCHECK(*ap);
|
|
if (length < sizeof(*ap))
|
|
goto trunc;
|
|
ND_PRINT((ndo, " rerr %s [items %u] [%u]:",
|
|
ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
|
|
ap->rerr_dc, length));
|
|
dp6 = (const struct rerr_unreach6_draft_01 *)(const void *)(ap + 1);
|
|
i = length - sizeof(*ap);
|
|
for (dc = ap->rerr_dc; dc != 0; dc--) {
|
|
ND_TCHECK(*dp6);
|
|
if (i < sizeof(*dp6))
|
|
goto trunc;
|
|
ND_PRINT((ndo, " {%s}(%ld)", ip6addr_string(ndo, &dp6->u_da),
|
|
(unsigned long)EXTRACT_32BITS(&dp6->u_ds)));
|
|
dp6++;
|
|
i -= sizeof(*dp6);
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, "[|rerr]"));
|
|
}
|
|
|
|
void
|
|
aodv_print(netdissect_options *ndo,
|
|
const u_char *dat, u_int length, int is_ip6)
|
|
{
|
|
uint8_t msg_type;
|
|
|
|
/*
|
|
* The message type is the first byte; make sure we have it
|
|
* and then fetch it.
|
|
*/
|
|
ND_TCHECK(*dat);
|
|
msg_type = *dat;
|
|
ND_PRINT((ndo, " aodv"));
|
|
|
|
switch (msg_type) {
|
|
|
|
case AODV_RREQ:
|
|
if (is_ip6)
|
|
aodv_v6_rreq(ndo, dat, length);
|
|
else
|
|
aodv_rreq(ndo, dat, length);
|
|
break;
|
|
|
|
case AODV_RREP:
|
|
if (is_ip6)
|
|
aodv_v6_rrep(ndo, dat, length);
|
|
else
|
|
aodv_rrep(ndo, dat, length);
|
|
break;
|
|
|
|
case AODV_RERR:
|
|
if (is_ip6)
|
|
aodv_v6_rerr(ndo, dat, length);
|
|
else
|
|
aodv_rerr(ndo, dat, length);
|
|
break;
|
|
|
|
case AODV_RREP_ACK:
|
|
ND_PRINT((ndo, " rrep-ack %u", length));
|
|
break;
|
|
|
|
case AODV_V6_DRAFT_01_RREQ:
|
|
aodv_v6_draft_01_rreq(ndo, dat, length);
|
|
break;
|
|
|
|
case AODV_V6_DRAFT_01_RREP:
|
|
aodv_v6_draft_01_rrep(ndo, dat, length);
|
|
break;
|
|
|
|
case AODV_V6_DRAFT_01_RERR:
|
|
aodv_v6_draft_01_rerr(ndo, dat, length);
|
|
break;
|
|
|
|
case AODV_V6_DRAFT_01_RREP_ACK:
|
|
ND_PRINT((ndo, " rrep-ack %u", length));
|
|
break;
|
|
|
|
default:
|
|
ND_PRINT((ndo, " type %u %u", msg_type, length));
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, " [|aodv]"));
|
|
}
|