* Further tweaked to more closely resemble print-fddi.c
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-token.c,v 1.9 2000-12-18 05:42:00 guy Exp $";
-#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-
-#include <netinet/in.h>
+#include <tcpdump-stdinc.h>
#include <pcap.h>
#include <stdio.h>
#include <string.h>
#include "interface.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 {
+ u_int8_t token_ac;
+ u_int8_t token_fc;
+ u_int8_t token_dhost[TOKEN_RING_MAC_LEN];
+ u_int8_t token_shost[TOKEN_RING_MAC_LEN];
+ u_int16_t token_rcf;
+ u_int16_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, (char *)trp->token_dhost, 6);
- memcpy(fsrc, (char *)trp->token_shost, 6);
+ 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_print(register const struct token_header *trp, register u_int length,
+token_hdr_print(register const struct token_header *trp, register u_int length,
register const u_char *fsrc, register const u_char *fdst)
{
- char *srcname, *dstname;
+ const char *srcname, *dstname;
srcname = etheraddr_string(fsrc);
dstname = etheraddr_string(fdst);
printf("%s %s %d: ", srcname, dstname, length);
}
-static char *broadcast_indicator[] = {
+static const char *broadcast_indicator[] = {
"Non-Broadcast", "Non-Broadcast",
"Non-Broadcast", "Non-Broadcast",
"All-routes", "All-routes",
"Single-route", "Single-route"
};
-static char *direction[] = {
+static const char *direction[] = {
"Forward", "Backward"
};
-static char *largest_frame[] = {
+static const char *largest_frame[] = {
"516",
"1500",
"2052",
"??"
};
-/*
- * This is the top level routine of the printer. 'p' is the points
- * to the TR header of the packet, 'tvp' is the timestamp,
- * 'length' is the length of the packet off the wire, and 'caplen'
- * is the number of bytes actually captured.
- */
-void
-token_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
+u_int
+token_print(const u_char *p, u_int length, u_int caplen)
{
- u_int caplen = h->caplen;
- u_int length = h->len;
- struct token_header *trp;
+ const struct token_header *trp;
u_short extracted_ethertype;
struct ether_header ehdr;
- u_int route_len = 0, seg;
-
- trp = (struct token_header *)p;
+ u_int route_len = 0, hdr_len = TOKEN_HDRLEN;
+ int seg;
- ts_print(&h->ts);
+ trp = (const struct token_header *)p;
if (caplen < TOKEN_HDRLEN) {
- printf("[|token-ring]");
- goto out;
+ printf("%s", tstr);
+ return hdr_len;
}
+
/*
* Get the TR addresses into a canonical form
*/
extract_token_addrs(trp, (char*)ESRC(&ehdr), (char*)EDST(&ehdr));
- /*
- * Some printers want to get back at the ethernet addresses,
- * and/or check that they're not walking off the end of the packet.
- * Rather than pass them all the way down, we set these globals.
- */
- snapend = p + caplen;
- /*
- * Actually, the only printer that uses packetp is print-bootp.c,
- * and it assumes that packetp points to an Ethernet header. The
- * right thing to do is to fix print-bootp.c to know which link
- * type is in use when it excavates. XXX
- */
- packetp = (u_char *)&ehdr;
/* Adjust for source routing information in the MAC header */
if (IS_SOURCE_ROUTED(trp)) {
*ESRC(&ehdr) &= 0x7f;
if (eflag)
- token_print(trp, length, ESRC(&ehdr), EDST(&ehdr));
+ token_hdr_print(trp, length, ESRC(&ehdr), EDST(&ehdr));
+ if (caplen < TOKEN_HDRLEN + 2) {
+ printf("%s", tstr);
+ return hdr_len;
+ }
route_len = RIF_LENGTH(trp);
+ hdr_len += route_len;
+ if (caplen < hdr_len) {
+ printf("%s", tstr);
+ return hdr_len;
+ }
if (vflag) {
printf("%s ", broadcast_indicator[BROADCAST(trp)]);
printf("%s", direction[DIRECTION(trp)]);
-
+
for (seg = 0; seg < SEGMENT_COUNT(trp); seg++)
printf(" [%d:%d]", RING_NUMBER(trp, seg),
BRIDGE_NUMBER(trp, seg));
} else {
- printf("rt = %x", ntohs(trp->token_rcf));
-
+ printf("rt = %x", EXTRACT_16BITS(&trp->token_rcf));
+
for (seg = 0; seg < SEGMENT_COUNT(trp); seg++)
- printf(":%x", ntohs(trp->token_rseg[seg]));
+ printf(":%x", EXTRACT_16BITS(&trp->token_rseg[seg]));
}
printf(" (%s) ", largest_frame[LARGEST_FRAME(trp)]);
} else {
if (eflag)
- token_print(trp, length, ESRC(&ehdr), EDST(&ehdr));
+ token_hdr_print(trp, length, ESRC(&ehdr), EDST(&ehdr));
}
/* Skip over token ring MAC header and routing information */
- length -= TOKEN_HDRLEN + route_len;
- p += TOKEN_HDRLEN + route_len;
- caplen -= TOKEN_HDRLEN + route_len;
+ length -= hdr_len;
+ p += hdr_len;
+ caplen -= hdr_len;
/* Frame Control field determines interpretation of packet */
- extracted_ethertype = 0;
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_print(trp, length,
+ 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 (!xflag && !qflag)
+ if (!suppress_default_print)
default_print(p, caplen);
}
} else {
/* Some kinds of TR packet we cannot handle intelligently */
/* XXX - dissect MAC packets if frame type is 0 */
if (!eflag)
- token_print(trp, length, ESRC(&ehdr), EDST(&ehdr));
- if (!xflag && !qflag)
+ token_hdr_print(trp, length + TOKEN_HDRLEN + route_len,
+ ESRC(&ehdr), EDST(&ehdr));
+ if (!suppress_default_print)
default_print(p, caplen);
}
- if (xflag)
- default_print(p, caplen);
-out:
- putchar('\n');
+ 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(const struct pcap_pkthdr *h, const u_char *p)
+{
+ return (token_print(p, h->len, h->caplen));
}
projects / tcpdump / blobdiff