* Further tweaked to more closely resemble print-fddi.c
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-token.c,v 1.14 2002-04-07 09:50:33 guy Exp $";
-#endif
+
+/* \summary: Token Ring printer */
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
+#include "netdissect-stdinc.h"
-#include <netinet/in.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 ROUTING_SEGMENT_MAX 16
+#define IS_SOURCE_ROUTED(trp) ((trp)->token_shost[0] & 0x80)
+#define FRAME_TYPE(trp) ((GET_U_1((trp)->token_fc) & 0xC0) >> 6)
+#define TOKEN_FC_LLC 1
+
+#define BROADCAST(trp) ((GET_BE_U_2((trp)->token_rcf) & 0xE000) >> 13)
+#define RIF_LENGTH(trp) ((GET_BE_U_2((trp)->token_rcf) & 0x1f00) >> 8)
+#define DIRECTION(trp) ((GET_BE_U_2((trp)->token_rcf) & 0x0080) >> 7)
+#define LARGEST_FRAME(trp) ((GET_BE_U_2((trp)->token_rcf) & 0x0070) >> 4)
+#define RING_NUMBER(trp, x) ((GET_BE_U_2((trp)->token_rseg[x]) & 0xfff0) >> 4)
+#define BRIDGE_NUMBER(trp, x) (GET_BE_U_2((trp)->token_rseg[x]) & 0x000f)
+#define SEGMENT_COUNT(trp) ((int)((RIF_LENGTH(trp) - 2) / 2))
+
+struct token_header {
+ nd_uint8_t token_ac;
+ nd_uint8_t token_fc;
+ nd_mac_addr token_dhost;
+ nd_mac_addr token_shost;
+ nd_uint16_t token_rcf;
+ nd_uint16_t token_rseg[ROUTING_SEGMENT_MAX];
+};
+
/* Extract src, dst addresses */
-static inline void
+static void
extract_token_addrs(const struct token_header *trp, char *fsrc, char *fdst)
{
memcpy(fdst, (const char *)trp->token_dhost, 6);
/*
* 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)
+static void
+token_hdr_print(netdissect_options *ndo,
+ const struct token_header *trp, u_int length,
+ const u_char *fsrc, const u_char *fdst)
{
const char *srcname, *dstname;
- srcname = etheraddr_string(fsrc);
- dstname = etheraddr_string(fdst);
-
- if (vflag)
- (void) printf("%02x %02x %s %s %d: ",
- trp->token_ac,
- trp->token_fc,
- srcname, dstname,
- length);
- else
- printf("%s %s %d: ", srcname, dstname, length);
+ srcname = etheraddr_string(ndo, fsrc);
+ dstname = etheraddr_string(ndo, fdst);
+
+ if (!ndo->ndo_qflag)
+ ND_PRINT("%02x %02x ",
+ GET_U_1(trp->token_ac),
+ GET_U_1(trp->token_fc));
+ ND_PRINT("%s > %s, length %u: ",
+ srcname, dstname,
+ length);
}
static const char *broadcast_indicator[] = {
"??"
};
-void
-token_print(const u_char *p, u_int length, u_int caplen)
+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, seg;
+ int llc_hdrlen;
+ nd_mac_addr srcmac, dstmac;
+ struct lladdr_info src, dst;
+ u_int route_len = 0, hdr_len = TOKEN_HDRLEN;
+ int seg;
+ ndo->ndo_protocol = "token-ring";
trp = (const struct token_header *)p;
if (caplen < TOKEN_HDRLEN) {
- printf("[|token-ring]");
- goto out;
+ nd_print_trunc(ndo);
+ 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 printers that use packetp are print-arp.c
- * and print-bootp.c, and they assume that packetp points to an
- * Ethernet header. The right thing to do is to fix them to know
- * which link type is in use when they excavate. XXX
- */
- packetp = (u_char *)&ehdr;
+ extract_token_addrs(trp, (char*)srcmac, (char*)dstmac);
/* Adjust for source routing information in the MAC header */
if (IS_SOURCE_ROUTED(trp)) {
/* Clear source-routed bit */
- *ESRC(&ehdr) &= 0x7f;
+ srcmac[0] &= 0x7f;
- if (eflag)
- token_hdr_print(trp, length, ESRC(&ehdr), EDST(&ehdr));
+ if (ndo->ndo_eflag)
+ token_hdr_print(ndo, trp, length, srcmac, dstmac);
+ if (caplen < TOKEN_HDRLEN + 2) {
+ nd_print_trunc(ndo);
+ return hdr_len;
+ }
route_len = RIF_LENGTH(trp);
- if (vflag) {
- printf("%s ", broadcast_indicator[BROADCAST(trp)]);
- printf("%s", direction[DIRECTION(trp)]);
-
+ hdr_len += route_len;
+ if (caplen < hdr_len) {
+ nd_print_trunc(ndo);
+ return hdr_len;
+ }
+ if (ndo->ndo_vflag) {
+ ND_PRINT("%s ", broadcast_indicator[BROADCAST(trp)]);
+ ND_PRINT("%s", direction[DIRECTION(trp)]);
+
for (seg = 0; seg < SEGMENT_COUNT(trp); seg++)
- printf(" [%d:%d]", RING_NUMBER(trp, seg),
+ ND_PRINT(" [%u:%u]", RING_NUMBER(trp, seg),
BRIDGE_NUMBER(trp, seg));
} else {
- printf("rt = %x", ntohs(trp->token_rcf));
-
+ ND_PRINT("rt = %x", GET_BE_U_2(trp->token_rcf));
+
for (seg = 0; seg < SEGMENT_COUNT(trp); seg++)
- printf(":%x", ntohs(trp->token_rseg[seg]));
+ ND_PRINT(":%x",
+ GET_BE_U_2(trp->token_rseg[seg]));
}
- printf(" (%s) ", largest_frame[LARGEST_FRAME(trp)]);
+ ND_PRINT(" (%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, srcmac, dstmac);
}
+ src.addr = srcmac;
+ src.addr_string = etheraddr_string;
+ dst.addr = dstmac;
+ dst.addr_string = etheraddr_string;
+
/* 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_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)
- 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,
- ESRC(&ehdr), EDST(&ehdr));
- if (!xflag && !qflag)
- default_print(p, caplen);
+ if (!ndo->ndo_eflag)
+ token_hdr_print(ndo, trp, length + TOKEN_HDRLEN + route_len,
+ srcmac, dstmac);
+ if (!ndo->ndo_suppress_default_print)
+ ND_DEFAULTPRINT(p, caplen);
}
- if (xflag)
- default_print(p, caplen);
-out:
- putchar('\n');
+ return (hdr_len);
}
/*
- * 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'
+ * 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.
*/
void
-token_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
+token_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
{
- u_int caplen = h->caplen;
- u_int length = h->len;
-
- ++infodelay;
- ts_print(&h->ts);
-
- token_print(p, length, caplen);
-
- --infodelay;
- if (infoprint)
- info(0);
+ ndo->ndo_protocol = "token-ring";
+ ndo->ndo_ll_hdr_len += token_print(ndo, p, h->len, h->caplen);
}
projects / tcpdump / blobdiff