tcpdump  4.99.1
About: tcpdump is a tool for network monitoring and data acquisition.
  Fossies Dox: tcpdump-4.99.1.tar.gz  ("unofficial" and yet experimental doxygen-generated source code documentation)  

print-symantec.c
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1 /*
2  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
3  * The Regents of the University of California. All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that: (1) source code distributions
7  * retain the above copyright notice and this paragraph in its entirety, (2)
8  * distributions including binary code include the above copyright notice and
9  * this paragraph in its entirety in the documentation or other materials
10  * provided with the distribution, and (3) all advertising materials mentioning
11  * features or use of this software display the following acknowledgement:
12  * ``This product includes software developed by the University of California,
13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14  * the University nor the names of its contributors may be used to endorse
15  * or promote products derived from this software without specific prior
16  * written permission.
17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20  */
21 
22 /* \summary: Symantec Enterprise Firewall printer */
23 
24 #ifdef HAVE_CONFIG_H
25 #include <config.h>
26 #endif
27 
28 #include "netdissect-stdinc.h"
29 
30 #define ND_LONGJMP_FROM_TCHECK
31 #include "netdissect.h"
32 #include "extract.h"
33 #include "ethertype.h"
34 
39 };
40 
41 static void
42 symantec_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length)
43 {
44  const struct symantec_header *sp;
45  uint16_t etype;
46 
47  sp = (const struct symantec_header *)bp;
48 
49  etype = GET_BE_U_2(sp->ether_type);
50  if (!ndo->ndo_qflag) {
51  if (etype <= MAX_ETHERNET_LENGTH_VAL)
52  ND_PRINT("invalid ethertype %u", etype);
53  else
54  ND_PRINT("ethertype %s (0x%04x)",
55  tok2str(ethertype_values,"Unknown", etype),
56  etype);
57  } else {
58  if (etype <= MAX_ETHERNET_LENGTH_VAL)
59  ND_PRINT("invalid ethertype %u", etype);
60  else
61  ND_PRINT("%s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", etype));
62  }
63 
64  ND_PRINT(", length %u: ", length);
65 }
66 
67 /*
68  * This is the top level routine of the printer. 'p' points
69  * to the ether header of the packet, 'h->ts' is the timestamp,
70  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
71  * is the number of bytes actually captured.
72  */
73 void
74 symantec_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
75 {
76  u_int length = h->len;
77  u_int caplen = h->caplen;
78  const struct symantec_header *sp;
79  u_short ether_type;
80 
81  ndo->ndo_protocol = "symantec";
82  ND_TCHECK_LEN(p, sizeof(struct symantec_header));
83 
84  ndo->ndo_ll_hdr_len += sizeof (struct symantec_header);
85  if (ndo->ndo_eflag)
86  symantec_hdr_print(ndo, p, length);
87 
88  length -= sizeof (struct symantec_header);
89  caplen -= sizeof (struct symantec_header);
90  sp = (const struct symantec_header *)p;
91  p += sizeof (struct symantec_header);
92 
94 
96  /* ether_type not known, print raw packet */
97  if (!ndo->ndo_eflag)
98  symantec_hdr_print(ndo, (const u_char *)sp, length + sizeof (struct symantec_header));
99 
100  if (!ndo->ndo_suppress_default_print)
101  ND_DEFAULTPRINT(p, caplen);
102  } else if (ethertype_print(ndo, ether_type, p, length, caplen, NULL, NULL) == 0) {
103  /* ether_type not known, print raw packet */
104  if (!ndo->ndo_eflag)
105  symantec_hdr_print(ndo, (const u_char *)sp, length + sizeof (struct symantec_header));
106 
107  if (!ndo->ndo_suppress_default_print)
108  ND_DEFAULTPRINT(p, caplen);
109  }
110 }
#define MAX_ETHERNET_LENGTH_VAL
Definition: ethertype.h:27
const struct tok ethertype_values[]
Definition: print-ether.c:52
#define GET_BE_U_2(p)
Definition: extract.h:875
unsigned char nd_uint16_t[2]
Definition: netdissect.h:47
#define ND_TCHECK_LEN(p, l)
Definition: netdissect.h:368
const char * tok2str(const struct tok *, const char *, u_int)
Definition: util-print.c:485
int ethertype_print(netdissect_options *, u_short, const u_char *, u_int, u_int, const struct lladdr_info *, const struct lladdr_info *)
Definition: print-ether.c:522
#define ND_DEFAULTPRINT(ap, length)
Definition: netdissect.h:386
unsigned char nd_byte
Definition: netdissect.h:108
#define ND_PRINT(...)
Definition: netdissect.h:385
void symantec_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
static void symantec_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length)
int ndo_suppress_default_print
Definition: netdissect.h:222
const char * ndo_protocol
Definition: netdissect.h:218
nd_byte stuff2[36]
nd_uint16_t ether_type
nd_byte stuff1[6]