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Diffstat (limited to 'print-symantec.c')
| -rw-r--r-- | print-symantec.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/print-symantec.c b/print-symantec.c new file mode 100644 index 0000000..0d394e3 --- /dev/null +++ b/print-symantec.c @@ -0,0 +1,110 @@ +/* + * 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. + */ + +/* \summary: Symantec Enterprise Firewall printer */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "netdissect-stdinc.h" + +#define ND_LONGJMP_FROM_TCHECK +#include "netdissect.h" +#include "extract.h" +#include "ethertype.h" + +struct symantec_header { + nd_byte stuff1[6]; + nd_uint16_t ether_type; + nd_byte stuff2[36]; +}; + +static void +symantec_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length) +{ + const struct symantec_header *sp; + uint16_t etype; + + sp = (const struct symantec_header *)bp; + + etype = GET_BE_U_2(sp->ether_type); + if (!ndo->ndo_qflag) { + if (etype <= MAX_ETHERNET_LENGTH_VAL) + ND_PRINT("invalid ethertype %u", etype); + else + ND_PRINT("ethertype %s (0x%04x)", + tok2str(ethertype_values,"Unknown", etype), + etype); + } else { + if (etype <= MAX_ETHERNET_LENGTH_VAL) + ND_PRINT("invalid ethertype %u", etype); + else + ND_PRINT("%s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", etype)); + } + + ND_PRINT(", 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. + */ +void +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; + + ndo->ndo_protocol = "symantec"; + ND_TCHECK_LEN(p, sizeof(struct symantec_header)); + + ndo->ndo_ll_hdr_len += sizeof (struct symantec_header); + 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 = GET_BE_U_2(sp->ether_type); + + if (ether_type <= MAX_ETHERNET_LENGTH_VAL) { + /* 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, NULL, NULL) == 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); + } +} |