253 lines
8.1 KiB
C
253 lines
8.1 KiB
C
/*
|
|
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that: (1) source code distributions
|
|
* retain the above copyright notice and this paragraph in its entirety, (2)
|
|
* distributions including binary code include the above copyright notice and
|
|
* this paragraph in its entirety in the documentation or other materials
|
|
* provided with the distribution, and (3) all advertising materials mentioning
|
|
* features or use of this software display the following acknowledgement:
|
|
* ``This product includes software developed by the University of California,
|
|
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
|
* the University nor the names of its contributors may be used to endorse
|
|
* or promote products derived from this software without specific prior
|
|
* written permission.
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
*
|
|
* Hacked version of print-ether.c Larry Lile <lile@stdio.com>
|
|
*
|
|
* Further tweaked to more closely resemble print-fddi.c
|
|
* Guy Harris <guy@alum.mit.edu>
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#define NETDISSECT_REWORKED
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <tcpdump-stdinc.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include "interface.h"
|
|
#include "extract.h"
|
|
#include "addrtoname.h"
|
|
#include "ether.h"
|
|
|
|
/*
|
|
* Copyright (c) 1998, Larry Lile
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice unmodified, this list of conditions, and the following
|
|
* disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#define TOKEN_HDRLEN 14
|
|
#define TOKEN_RING_MAC_LEN 6
|
|
#define ROUTING_SEGMENT_MAX 16
|
|
#define IS_SOURCE_ROUTED(trp) ((trp)->token_shost[0] & 0x80)
|
|
#define FRAME_TYPE(trp) (((trp)->token_fc & 0xC0) >> 6)
|
|
#define TOKEN_FC_LLC 1
|
|
|
|
#define BROADCAST(trp) ((EXTRACT_16BITS(&(trp)->token_rcf) & 0xE000) >> 13)
|
|
#define RIF_LENGTH(trp) ((EXTRACT_16BITS(&(trp)->token_rcf) & 0x1f00) >> 8)
|
|
#define DIRECTION(trp) ((EXTRACT_16BITS(&(trp)->token_rcf) & 0x0080) >> 7)
|
|
#define LARGEST_FRAME(trp) ((EXTRACT_16BITS(&(trp)->token_rcf) & 0x0070) >> 4)
|
|
#define RING_NUMBER(trp, x) ((EXTRACT_16BITS(&(trp)->token_rseg[x]) & 0xfff0) >> 4)
|
|
#define BRIDGE_NUMBER(trp, x) ((EXTRACT_16BITS(&(trp)->token_rseg[x]) & 0x000f))
|
|
#define SEGMENT_COUNT(trp) ((int)((RIF_LENGTH(trp) - 2) / 2))
|
|
|
|
struct token_header {
|
|
uint8_t token_ac;
|
|
uint8_t token_fc;
|
|
uint8_t token_dhost[TOKEN_RING_MAC_LEN];
|
|
uint8_t token_shost[TOKEN_RING_MAC_LEN];
|
|
uint16_t token_rcf;
|
|
uint16_t token_rseg[ROUTING_SEGMENT_MAX];
|
|
};
|
|
|
|
static const char tstr[] = "[|token-ring]";
|
|
|
|
/* Extract src, dst addresses */
|
|
static inline void
|
|
extract_token_addrs(const struct token_header *trp, char *fsrc, char *fdst)
|
|
{
|
|
memcpy(fdst, (const char *)trp->token_dhost, 6);
|
|
memcpy(fsrc, (const char *)trp->token_shost, 6);
|
|
}
|
|
|
|
/*
|
|
* Print the TR MAC header
|
|
*/
|
|
static inline void
|
|
token_hdr_print(netdissect_options *ndo,
|
|
register const struct token_header *trp, register u_int length,
|
|
register const u_char *fsrc, register const u_char *fdst)
|
|
{
|
|
const char *srcname, *dstname;
|
|
|
|
srcname = etheraddr_string(ndo, fsrc);
|
|
dstname = etheraddr_string(ndo, fdst);
|
|
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT((ndo, "%02x %02x %s %s %d: ",
|
|
trp->token_ac,
|
|
trp->token_fc,
|
|
srcname, dstname,
|
|
length));
|
|
else
|
|
ND_PRINT((ndo, "%s %s %d: ", srcname, dstname, length));
|
|
}
|
|
|
|
static const char *broadcast_indicator[] = {
|
|
"Non-Broadcast", "Non-Broadcast",
|
|
"Non-Broadcast", "Non-Broadcast",
|
|
"All-routes", "All-routes",
|
|
"Single-route", "Single-route"
|
|
};
|
|
|
|
static const char *direction[] = {
|
|
"Forward", "Backward"
|
|
};
|
|
|
|
static const char *largest_frame[] = {
|
|
"516",
|
|
"1500",
|
|
"2052",
|
|
"4472",
|
|
"8144",
|
|
"11407",
|
|
"17800",
|
|
"??"
|
|
};
|
|
|
|
u_int
|
|
token_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
|
|
{
|
|
const struct token_header *trp;
|
|
u_short extracted_ethertype;
|
|
struct ether_header ehdr;
|
|
u_int route_len = 0, hdr_len = TOKEN_HDRLEN;
|
|
int seg;
|
|
|
|
trp = (const struct token_header *)p;
|
|
|
|
if (caplen < TOKEN_HDRLEN) {
|
|
ND_PRINT((ndo, "%s", tstr));
|
|
return hdr_len;
|
|
}
|
|
|
|
/*
|
|
* Get the TR addresses into a canonical form
|
|
*/
|
|
extract_token_addrs(trp, (char*)ESRC(&ehdr), (char*)EDST(&ehdr));
|
|
|
|
/* Adjust for source routing information in the MAC header */
|
|
if (IS_SOURCE_ROUTED(trp)) {
|
|
/* Clear source-routed bit */
|
|
*ESRC(&ehdr) &= 0x7f;
|
|
|
|
if (ndo->ndo_eflag)
|
|
token_hdr_print(ndo, trp, length, ESRC(&ehdr), EDST(&ehdr));
|
|
|
|
if (caplen < TOKEN_HDRLEN + 2) {
|
|
ND_PRINT((ndo, "%s", tstr));
|
|
return hdr_len;
|
|
}
|
|
route_len = RIF_LENGTH(trp);
|
|
hdr_len += route_len;
|
|
if (caplen < hdr_len) {
|
|
ND_PRINT((ndo, "%s", tstr));
|
|
return hdr_len;
|
|
}
|
|
if (ndo->ndo_vflag) {
|
|
ND_PRINT((ndo, "%s ", broadcast_indicator[BROADCAST(trp)]));
|
|
ND_PRINT((ndo, "%s", direction[DIRECTION(trp)]));
|
|
|
|
for (seg = 0; seg < SEGMENT_COUNT(trp); seg++)
|
|
ND_PRINT((ndo, " [%d:%d]", RING_NUMBER(trp, seg),
|
|
BRIDGE_NUMBER(trp, seg)));
|
|
} else {
|
|
ND_PRINT((ndo, "rt = %x", EXTRACT_16BITS(&trp->token_rcf)));
|
|
|
|
for (seg = 0; seg < SEGMENT_COUNT(trp); seg++)
|
|
ND_PRINT((ndo, ":%x", EXTRACT_16BITS(&trp->token_rseg[seg])));
|
|
}
|
|
ND_PRINT((ndo, " (%s) ", largest_frame[LARGEST_FRAME(trp)]));
|
|
} else {
|
|
if (ndo->ndo_eflag)
|
|
token_hdr_print(ndo, trp, length, ESRC(&ehdr), EDST(&ehdr));
|
|
}
|
|
|
|
/* Skip over token ring MAC header and routing information */
|
|
length -= hdr_len;
|
|
p += hdr_len;
|
|
caplen -= hdr_len;
|
|
|
|
/* Frame Control field determines interpretation of packet */
|
|
if (FRAME_TYPE(trp) == TOKEN_FC_LLC) {
|
|
/* Try to print the LLC-layer header & higher layers */
|
|
if (llc_print(ndo, p, length, caplen, ESRC(&ehdr), EDST(&ehdr),
|
|
&extracted_ethertype) == 0) {
|
|
/* ether_type not known, print raw packet */
|
|
if (!ndo->ndo_eflag)
|
|
token_hdr_print(ndo, trp,
|
|
length + TOKEN_HDRLEN + route_len,
|
|
ESRC(&ehdr), EDST(&ehdr));
|
|
if (extracted_ethertype) {
|
|
ND_PRINT((ndo, "(LLC %s) ",
|
|
etherproto_string(htons(extracted_ethertype))));
|
|
}
|
|
if (!ndo->ndo_suppress_default_print)
|
|
ND_DEFAULTPRINT(p, caplen);
|
|
}
|
|
} else {
|
|
/* Some kinds of TR packet we cannot handle intelligently */
|
|
/* XXX - dissect MAC packets if frame type is 0 */
|
|
if (!ndo->ndo_eflag)
|
|
token_hdr_print(ndo, trp, length + TOKEN_HDRLEN + route_len,
|
|
ESRC(&ehdr), EDST(&ehdr));
|
|
if (!ndo->ndo_suppress_default_print)
|
|
ND_DEFAULTPRINT(p, caplen);
|
|
}
|
|
return (hdr_len);
|
|
}
|
|
|
|
/*
|
|
* This is the top level routine of the printer. 'p' points
|
|
* to the TR header of the packet, 'h->ts' is the timestamp,
|
|
* 'h->len' is the length of the packet off the wire, and 'h->caplen'
|
|
* is the number of bytes actually captured.
|
|
*/
|
|
u_int
|
|
token_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
|
|
{
|
|
return (token_print(ndo, p, h->len, h->caplen));
|
|
}
|