/* * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that: (1) source code distributions * retain the above copyright notice and this paragraph in its entirety, (2) * distributions including binary code include the above copyright notice and * this paragraph in its entirety in the documentation or other materials * provided with the distribution, and (3) all advertising materials mentioning * features or use of this software display the following acknowledgement: * ``This product includes software developed by the University of California, * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of * the University nor the names of its contributors may be used to endorse * or promote products derived from this software without specific prior * written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "netdissect.h" #include "extract.h" #include "ethertype.h" #include "ether.h" struct symantec_header { uint8_t stuff1[6]; uint16_t ether_type; uint8_t stuff2[36]; }; static inline void symantec_hdr_print(netdissect_options *ndo, register const u_char *bp, u_int length) { register const struct symantec_header *sp; uint16_t etype; sp = (const struct symantec_header *)bp; etype = EXTRACT_16BITS(&sp->ether_type); if (!ndo->ndo_qflag) { if (etype <= ETHERMTU) ND_PRINT((ndo, "invalid ethertype %u", etype)); else ND_PRINT((ndo, "ethertype %s (0x%04x)", tok2str(ethertype_values,"Unknown", etype), etype)); } else { if (etype <= ETHERMTU) ND_PRINT((ndo, "invalid ethertype %u", etype)); else ND_PRINT((ndo, "%s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", etype))); } ND_PRINT((ndo, ", length %u: ", length)); } /* * This is the top level routine of the printer. 'p' points * to the ether 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 symantec_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) { u_int length = h->len; u_int caplen = h->caplen; const struct symantec_header *sp; u_short ether_type; if (caplen < sizeof (struct symantec_header)) { ND_PRINT((ndo, "[|symantec]")); return caplen; } if (ndo->ndo_eflag) symantec_hdr_print(ndo, p, length); length -= sizeof (struct symantec_header); caplen -= sizeof (struct symantec_header); sp = (const struct symantec_header *)p; p += sizeof (struct symantec_header); ether_type = EXTRACT_16BITS(&sp->ether_type); if (ether_type <= ETHERMTU) { /* ether_type not known, print raw packet */ if (!ndo->ndo_eflag) symantec_hdr_print(ndo, (const u_char *)sp, length + sizeof (struct symantec_header)); if (!ndo->ndo_suppress_default_print) ND_DEFAULTPRINT(p, caplen); } else if (ethertype_print(ndo, ether_type, p, length, caplen) == 0) { /* ether_type not known, print raw packet */ if (!ndo->ndo_eflag) symantec_hdr_print(ndo, (const u_char *)sp, length + sizeof (struct symantec_header)); if (!ndo->ndo_suppress_default_print) ND_DEFAULTPRINT(p, caplen); } return (sizeof (struct symantec_header)); }