* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-fddi.c,v 1.52 2001-09-18 15:46:36 fenner Exp $ (LBL)";
-#endif
+/* \summary: Fiber Distributed Data Interface (FDDI) printer */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-#include <sys/file.h>
-#include <sys/ioctl.h>
-
-#include <netinet/in.h>
+#include <netdissect-stdinc.h>
-#include <ctype.h>
-#include <netdb.h>
-#include <pcap.h>
-#include <stdio.h>
#include <string.h>
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
-#include "ethertype.h"
-
#include "ether.h"
-#include "fddi.h"
+
+/*
+ * Based on Ultrix if_fddi.h
+ */
+
+struct fddi_header {
+ u_char fddi_fc; /* frame control */
+ u_char fddi_dhost[6];
+ u_char fddi_shost[6];
+};
+
+/*
+ * Length of an FDDI header; note that some compilers may pad
+ * "struct fddi_header" to a multiple of 4 bytes, for example, so
+ * "sizeof (struct fddi_header)" may not give the right
+ * answer.
+ */
+#define FDDI_HDRLEN 13
+
+/* Useful values for fddi_fc (frame control) field */
+
+/*
+ * FDDI Frame Control bits
+ */
+#define FDDIFC_C 0x80 /* Class bit */
+#define FDDIFC_L 0x40 /* Address length bit */
+#define FDDIFC_F 0x30 /* Frame format bits */
+#define FDDIFC_Z 0x0f /* Control bits */
+
+/*
+ * FDDI Frame Control values. (48-bit addressing only).
+ */
+#define FDDIFC_VOID 0x40 /* Void frame */
+#define FDDIFC_NRT 0x80 /* Nonrestricted token */
+#define FDDIFC_RT 0xc0 /* Restricted token */
+#define FDDIFC_SMT_INFO 0x41 /* SMT Info */
+#define FDDIFC_SMT_NSA 0x4F /* SMT Next station adrs */
+#define FDDIFC_MAC_BEACON 0xc2 /* MAC Beacon frame */
+#define FDDIFC_MAC_CLAIM 0xc3 /* MAC Claim frame */
+#define FDDIFC_LLC_ASYNC 0x50 /* Async. LLC frame */
+#define FDDIFC_LLC_SYNC 0xd0 /* Sync. LLC frame */
+#define FDDIFC_IMP_ASYNC 0x60 /* Implementor Async. */
+#define FDDIFC_IMP_SYNC 0xe0 /* Implementor Synch. */
+#define FDDIFC_SMT 0x40 /* SMT frame */
+#define FDDIFC_MAC 0xc0 /* MAC frame */
+
+#define FDDIFC_CLFF 0xF0 /* Class/Length/Format bits */
+#define FDDIFC_ZZZZ 0x0F /* Control bits */
/*
* Some FDDI interfaces use bit-swapped addresses.
*/
-#if defined(ultrix) || defined(__alpha) || defined(__bsdi) || defined(__NetBSD__)
-int fddi_bitswap = 0;
+#if defined(ultrix) || defined(__alpha) || defined(__bsdi) || defined(__NetBSD__) || defined(__linux__)
+static int fddi_bitswap = 0;
#else
-int fddi_bitswap = 1;
+static int fddi_bitswap = 1;
#endif
/*
* - vj
*/
-static u_char fddi_bit_swap[] = {
+static const u_char fddi_bit_swap[] = {
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
* Print FDDI frame-control bits
*/
static inline void
-print_fddi_fc(u_char fc)
+print_fddi_fc(netdissect_options *ndo, u_char fc)
{
switch (fc) {
case FDDIFC_VOID: /* Void frame */
- printf("void ");
+ ND_PRINT((ndo, "void "));
break;
case FDDIFC_NRT: /* Nonrestricted token */
- printf("nrt ");
+ ND_PRINT((ndo, "nrt "));
break;
case FDDIFC_RT: /* Restricted token */
- printf("rt ");
+ ND_PRINT((ndo, "rt "));
break;
case FDDIFC_SMT_INFO: /* SMT Info */
- printf("info ");
+ ND_PRINT((ndo, "info "));
break;
case FDDIFC_SMT_NSA: /* SMT Next station adrs */
- printf("nsa ");
+ ND_PRINT((ndo, "nsa "));
break;
case FDDIFC_MAC_BEACON: /* MAC Beacon frame */
- printf("beacon ");
+ ND_PRINT((ndo, "beacon "));
break;
case FDDIFC_MAC_CLAIM: /* MAC Claim frame */
- printf("claim ");
+ ND_PRINT((ndo, "claim "));
break;
default:
switch (fc & FDDIFC_CLFF) {
case FDDIFC_MAC:
- printf("mac%1x ", fc & FDDIFC_ZZZZ);
+ ND_PRINT((ndo, "mac%1x ", fc & FDDIFC_ZZZZ));
break;
case FDDIFC_SMT:
- printf("smt%1x ", fc & FDDIFC_ZZZZ);
+ ND_PRINT((ndo, "smt%1x ", fc & FDDIFC_ZZZZ));
break;
case FDDIFC_LLC_ASYNC:
- printf("async%1x ", fc & FDDIFC_ZZZZ);
+ ND_PRINT((ndo, "async%1x ", fc & FDDIFC_ZZZZ));
break;
case FDDIFC_LLC_SYNC:
- printf("sync%1x ", fc & FDDIFC_ZZZZ);
+ ND_PRINT((ndo, "sync%1x ", fc & FDDIFC_ZZZZ));
break;
case FDDIFC_IMP_ASYNC:
- printf("imp_async%1x ", fc & FDDIFC_ZZZZ);
+ ND_PRINT((ndo, "imp_async%1x ", fc & FDDIFC_ZZZZ));
break;
case FDDIFC_IMP_SYNC:
- printf("imp_sync%1x ", fc & FDDIFC_ZZZZ);
+ ND_PRINT((ndo, "imp_sync%1x ", fc & FDDIFC_ZZZZ));
break;
default:
- printf("%02x ", fc);
+ ND_PRINT((ndo, "%02x ", fc));
break;
}
}
* Print the FDDI MAC header
*/
static inline void
-fddi_print(register const struct fddi_header *fddip, register u_int length,
- register const u_char *fsrc, register const u_char *fdst)
+fddi_hdr_print(netdissect_options *ndo,
+ register const struct fddi_header *fddip, 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 %s %s %d: ",
- fddip->fddi_fc,
- srcname, dstname,
- length);
- else if (qflag)
- printf("%s %s %d: ", srcname, dstname, length);
- else {
- (void) print_fddi_fc(fddip->fddi_fc);
- (void) printf("%s %s %d: ", srcname, dstname, length);
- }
+ if (!ndo->ndo_qflag)
+ print_fddi_fc(ndo, fddip->fddi_fc);
+ ND_PRINT((ndo, "%s > %s, length %u: ",
+ srcname, dstname,
+ length));
}
static inline void
-fddi_smt_print(const u_char *p, u_int length)
+fddi_smt_print(netdissect_options *ndo, const u_char *p _U_, u_int length _U_)
{
- printf("<SMT printer not yet implemented>");
+ ND_PRINT((ndo, "<SMT printer not yet implemented>"));
}
-/*
- * This is the top level routine of the printer. 'sp' is the points
- * to the FDDI 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
-fddi_if_print(u_char *pcap, const struct pcap_pkthdr *h,
- register const u_char *p)
+u_int
+fddi_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
{
- u_int caplen = h->caplen;
- u_int length = h->len;
const struct fddi_header *fddip = (const struct fddi_header *)p;
struct ether_header ehdr;
- u_short extracted_ethertype;
-
- ++infodelay;
- ts_print(&h->ts);
+ struct lladdr_info src, dst;
+ int llc_hdrlen;
if (caplen < FDDI_HDRLEN) {
- printf("[|fddi]");
- goto out;
+ ND_PRINT((ndo, "[|fddi]"));
+ return (caplen);
}
+
/*
* Get the FDDI addresses into a canonical form
*/
extract_fddi_addrs(fddip, (char *)ESRC(&ehdr), (char *)EDST(&ehdr));
- /*
- * Some printers want to get back at the link level 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;
- if (eflag)
- fddi_print(fddip, length, ESRC(&ehdr), EDST(&ehdr));
+ if (ndo->ndo_eflag)
+ fddi_hdr_print(ndo, fddip, 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 FDDI MAC header */
length -= FDDI_HDRLEN;
caplen -= FDDI_HDRLEN;
/* Frame Control field determines interpretation of packet */
- extracted_ethertype = 0;
if ((fddip->fddi_fc & FDDIFC_CLFF) == FDDIFC_LLC_ASYNC) {
/* Try to print the LLC-layer header & higher layers */
- if (llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr),
- &extracted_ethertype) == 0) {
+ llc_hdrlen = llc_print(ndo, p, length, caplen, &src, &dst);
+ if (llc_hdrlen < 0) {
/*
* Some kinds of LLC packet we cannot
* handle intelligently
*/
- if (!eflag)
- fddi_print(fddip, length + FDDI_HDRLEN,
- ESRC(&ehdr), EDST(&ehdr));
- if (extracted_ethertype) {
- printf("(LLC %s) ",
- etherproto_string(htons(extracted_ethertype)));
- }
- if (!xflag && !qflag)
- default_print(p, caplen);
+ if (!ndo->ndo_suppress_default_print)
+ ND_DEFAULTPRINT(p, caplen);
+ llc_hdrlen = -llc_hdrlen;
}
- } else if ((fddip->fddi_fc & FDDIFC_CLFF) == FDDIFC_SMT)
- fddi_smt_print(p, caplen);
- else {
+ } else if ((fddip->fddi_fc & FDDIFC_CLFF) == FDDIFC_SMT) {
+ fddi_smt_print(ndo, p, caplen);
+ llc_hdrlen = 0;
+ } else {
/* Some kinds of FDDI packet we cannot handle intelligently */
- if (!eflag)
- fddi_print(fddip, length + FDDI_HDRLEN, ESRC(&ehdr),
+ if (!ndo->ndo_eflag)
+ fddi_hdr_print(ndo, fddip, length + FDDI_HDRLEN, ESRC(&ehdr),
EDST(&ehdr));
- if (!xflag && !qflag)
- default_print(p, caplen);
+ if (!ndo->ndo_suppress_default_print)
+ ND_DEFAULTPRINT(p, caplen);
+ llc_hdrlen = 0;
}
- if (xflag)
- default_print(p, caplen);
-out:
- putchar('\n');
- --infodelay;
- if (infoprint)
- info(0);
+ return (FDDI_HDRLEN + llc_hdrlen);
+}
+
+/*
+ * This is the top level routine of the printer. 'p' points
+ * to the FDDI 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
+fddi_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, register const u_char *p)
+{
+ return (fddi_print(ndo, p, h->len, h->caplen));
}
projects / tcpdump / blobdiff