X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/a57421867fff43381f2ca80c43bb0be3037c562e..bd00116d80c18b782f4cb15dfc90cd5bf993d4f5:/print-fddi.c diff --git a/print-fddi.c b/print-fddi.c index bf090d7c..7576b6f0 100644 --- a/print-fddi.c +++ b/print-fddi.c @@ -19,35 +19,65 @@ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ -#ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-fddi.c,v 1.54 2002-04-07 09:50:32 guy Exp $ (LBL)"; -#endif - #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include -#include -#include -#include -#include +#include -#include - -#include -#include -#include -#include #include #include "interface.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. @@ -88,7 +118,7 @@ int fddi_bitswap = 1; * - 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, @@ -127,67 +157,67 @@ static u_char fddi_bit_swap[] = { * 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; } } @@ -219,64 +249,53 @@ extract_fddi_addrs(const struct fddi_header *fddip, char *fsrc, char *fdst) * Print the FDDI MAC header */ static inline void -fddi_hdr_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: ", + if (ndo->ndo_vflag) + ND_PRINT((ndo, "%02x %s %s %d: ", fddip->fddi_fc, srcname, dstname, - length); - else if (qflag) - printf("%s %s %d: ", srcname, dstname, length); + length)); + else if (ndo->ndo_qflag) + ND_PRINT((ndo, "%s %s %d: ", srcname, dstname, length)); else { - (void) print_fddi_fc(fddip->fddi_fc); - (void) printf("%s %s %d: ", srcname, dstname, length); + print_fddi_fc(ndo, fddip->fddi_fc); + ND_PRINT((ndo, "%s %s %d: ", 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(""); + ND_PRINT((ndo, "")); } -void -fddi_print(const u_char *p, u_int length, u_int caplen) +u_int +fddi_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen) { const struct fddi_header *fddip = (const struct fddi_header *)p; struct ether_header ehdr; - u_short extracted_ethertype; + 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_hdr_print(fddip, length, ESRC(&ehdr), EDST(&ehdr)); + if (ndo->ndo_eflag) + fddi_hdr_print(ndo, fddip, length, ESRC(&ehdr), EDST(&ehdr)); /* Skip over FDDI MAC header */ length -= FDDI_HDRLEN; @@ -284,60 +303,41 @@ fddi_print(const u_char *p, u_int length, u_int caplen) 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, ESRC(&ehdr), EDST(&ehdr)); + if (llc_hdrlen < 0) { /* * Some kinds of LLC packet we cannot * handle intelligently */ - if (!eflag) - fddi_hdr_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_hdr_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'); + return (FDDI_HDRLEN + llc_hdrlen); } /* - * 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' + * 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. */ -void -fddi_if_print(u_char *pcap, const struct pcap_pkthdr *h, - register const u_char *p) +u_int +fddi_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, register const u_char *p) { - u_int caplen = h->caplen; - u_int length = h->len; - - ++infodelay; - ts_print(&h->ts); - - fddi_print(p, length, caplen); - - --infodelay; - if (infoprint) - info(0); + return (fddi_print(ndo, p, h->len, h->caplen)); }