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-rw-r--r--print-token.c163
1 files changed, 105 insertions, 58 deletions
diff --git a/print-token.c b/print-token.c
index 4f8422b..faffd4b 100644
--- a/print-token.c
+++ b/print-token.c
@@ -23,28 +23,75 @@
* Further tweaked to more closely resemble print-fddi.c
* Guy Harris <guy@alum.mit.edu>
*/
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/tcpdump/print-token.c,v 1.27 2005-11-13 12:12:43 guy Exp $";
-#endif
+
+/* \summary: Token Ring printer */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
-#include <pcap.h>
-#include <stdio.h>
#include <string.h>
-#include "interface.h"
+#include "netdissect.h"
#include "extract.h"
#include "addrtoname.h"
-#include "ethertype.h"
-
#include "ether.h"
-#include "token.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
@@ -58,22 +105,22 @@ extract_token_addrs(const struct token_header *trp, char *fsrc, char *fdst)
* Print the TR MAC header
*/
static inline void
-token_hdr_print(register const struct token_header *trp, register u_int length,
- register const u_char *fsrc, register const u_char *fdst)
+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(fsrc);
- dstname = etheraddr_string(fdst);
+ srcname = etheraddr_string(ndo, fsrc);
+ dstname = etheraddr_string(ndo, fdst);
- if (vflag)
- (void) printf("%02x %02x %s %s %d: ",
+ if (!ndo->ndo_qflag)
+ ND_PRINT((ndo, "%02x %02x ",
trp->token_ac,
- trp->token_fc,
- srcname, dstname,
- length);
- else
- printf("%s %s %d: ", srcname, dstname, length);
+ trp->token_fc));
+ ND_PRINT((ndo, "%s > %s, length %u: ",
+ srcname, dstname,
+ length));
}
static const char *broadcast_indicator[] = {
@@ -99,18 +146,19 @@ static const char *largest_frame[] = {
};
u_int
-token_print(const u_char *p, u_int length, u_int caplen)
+token_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
{
const struct token_header *trp;
- u_short extracted_ethertype;
+ int llc_hdrlen;
struct ether_header ehdr;
+ struct lladdr_info src, dst;
u_int route_len = 0, hdr_len = TOKEN_HDRLEN;
int seg;
trp = (const struct token_header *)p;
if (caplen < TOKEN_HDRLEN) {
- printf("[|token-ring]");
+ ND_PRINT((ndo, "%s", tstr));
return hdr_len;
}
@@ -124,38 +172,43 @@ token_print(const u_char *p, u_int length, u_int caplen)
/* Clear source-routed bit */
*ESRC(&ehdr) &= 0x7f;
- if (eflag)
- token_hdr_print(trp, length, ESRC(&ehdr), EDST(&ehdr));
+ if (ndo->ndo_eflag)
+ token_hdr_print(ndo, trp, length, ESRC(&ehdr), EDST(&ehdr));
if (caplen < TOKEN_HDRLEN + 2) {
- printf("[|token-ring]");
+ ND_PRINT((ndo, "%s", tstr));
return hdr_len;
}
route_len = RIF_LENGTH(trp);
hdr_len += route_len;
if (caplen < hdr_len) {
- printf("[|token-ring]");
+ ND_PRINT((ndo, "%s", tstr));
return hdr_len;
}
- if (vflag) {
- printf("%s ", broadcast_indicator[BROADCAST(trp)]);
- printf("%s", direction[DIRECTION(trp)]);
+ 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++)
- printf(" [%d:%d]", RING_NUMBER(trp, seg),
- BRIDGE_NUMBER(trp, seg));
+ ND_PRINT((ndo, " [%d:%d]", RING_NUMBER(trp, seg),
+ BRIDGE_NUMBER(trp, seg)));
} else {
- printf("rt = %x", EXTRACT_16BITS(&trp->token_rcf));
+ ND_PRINT((ndo, "rt = %x", EXTRACT_16BITS(&trp->token_rcf)));
for (seg = 0; seg < SEGMENT_COUNT(trp); seg++)
- printf(":%x", EXTRACT_16BITS(&trp->token_rseg[seg]));
+ ND_PRINT((ndo, ":%x", EXTRACT_16BITS(&trp->token_rseg[seg])));
}
- printf(" (%s) ", largest_frame[LARGEST_FRAME(trp)]);
+ ND_PRINT((ndo, " (%s) ", largest_frame[LARGEST_FRAME(trp)]));
} else {
- if (eflag)
- token_hdr_print(trp, length, ESRC(&ehdr), EDST(&ehdr));
+ if (ndo->ndo_eflag)
+ token_hdr_print(ndo, trp, length, ESRC(&ehdr), EDST(&ehdr));
}
+ src.addr = ESRC(&ehdr);
+ src.addr_string = etheraddr_string;
+ dst.addr = EDST(&ehdr);
+ dst.addr_string = etheraddr_string;
+
/* Skip over token ring MAC header and routing information */
length -= hdr_len;
p += hdr_len;
@@ -164,28 +217,22 @@ token_print(const u_char *p, u_int length, u_int caplen)
/* 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(p, length, caplen, ESRC(&ehdr), EDST(&ehdr),
- &extracted_ethertype) == 0) {
- /* ether_type not known, print raw packet */
- if (!eflag)
- token_hdr_print(trp,
- length + TOKEN_HDRLEN + route_len,
- ESRC(&ehdr), EDST(&ehdr));
- if (extracted_ethertype) {
- printf("(LLC %s) ",
- etherproto_string(htons(extracted_ethertype)));
- }
- if (!suppress_default_print)
- default_print(p, caplen);
+ llc_hdrlen = llc_print(ndo, p, length, caplen, &src, &dst);
+ if (llc_hdrlen < 0) {
+ /* packet type not known, print raw packet */
+ if (!ndo->ndo_suppress_default_print)
+ ND_DEFAULTPRINT(p, caplen);
+ llc_hdrlen = -llc_hdrlen;
}
+ hdr_len += llc_hdrlen;
} else {
/* Some kinds of TR packet we cannot handle intelligently */
/* XXX - dissect MAC packets if frame type is 0 */
- if (!eflag)
- token_hdr_print(trp, length + TOKEN_HDRLEN + route_len,
+ if (!ndo->ndo_eflag)
+ token_hdr_print(ndo, trp, length + TOKEN_HDRLEN + route_len,
ESRC(&ehdr), EDST(&ehdr));
- if (!suppress_default_print)
- default_print(p, caplen);
+ if (!ndo->ndo_suppress_default_print)
+ ND_DEFAULTPRINT(p, caplen);
}
return (hdr_len);
}
@@ -197,7 +244,7 @@ token_print(const u_char *p, u_int length, u_int caplen)
* is the number of bytes actually captured.
*/
u_int
-token_if_print(const struct pcap_pkthdr *h, const u_char *p)
+token_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
{
- return (token_print(p, h->len, h->caplen));
+ return (token_print(ndo, p, h->len, h->caplen));
}
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