tcpdump  4.99.1
About: tcpdump is a tool for network monitoring and data acquisition.
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print-ipoib.c
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1 /*
2  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
3  * 1997, 2000, 2011, 2012
4  * The Regents of the University of California. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that: (1) source code distributions
8  * retain the above copyright notice and this paragraph in its entirety, (2)
9  * distributions including binary code include the above copyright notice and
10  * this paragraph in its entirety in the documentation or other materials
11  * provided with the distribution, and (3) all advertising materials mentioning
12  * features or use of this software display the following acknowledgement:
13  * ``This product includes software developed by the University of California,
14  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
15  * the University nor the names of its contributors may be used to endorse
16  * or promote products derived from this software without specific prior
17  * written permission.
18  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
19  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
20  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
21  */
22 /*
23  * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
24  */
25 
26 /* \summary: IP-over-InfiniBand (IPoIB) printer */
27 
28 #ifdef HAVE_CONFIG_H
29 #include <config.h>
30 #endif
31 
32 #include "netdissect-stdinc.h"
33 
34 #include "netdissect.h"
35 #include "extract.h"
36 #include "addrtoname.h"
37 
38 
39 extern const struct tok ethertype_values[];
40 
41 #define IPOIB_HDRLEN 44
42 
43 static inline void
44 ipoib_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length)
45 {
46  uint16_t ether_type;
47 
48  ether_type = GET_BE_U_2(bp + 40);
49  if (!ndo->ndo_qflag) {
50  ND_PRINT(", ethertype %s (0x%04x)",
51  tok2str(ethertype_values,"Unknown", ether_type),
52  ether_type);
53  } else {
54  ND_PRINT(", ethertype %s",
55  tok2str(ethertype_values,"Unknown", ether_type));
56  }
57 
58  ND_PRINT(", length %u: ", length);
59 }
60 
61 /*
62  * Print an InfiniBand frame.
63  * This might be encapsulated within another frame; we might be passed
64  * a pointer to a function that can print header information for that
65  * frame's protocol, and an argument to pass to that function.
66  */
67 static void
68 ipoib_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen,
69  void (*print_encap_header)(const u_char *), const u_char *encap_header_arg)
70 {
71  const u_char *orig_hdr = p;
72  u_int orig_length;
73  u_short ether_type;
74 
75  if (caplen < IPOIB_HDRLEN) {
76  nd_print_trunc(ndo);
77  ndo->ndo_ll_hdr_len += caplen;
78  return;
79  }
80 
81  if (length < IPOIB_HDRLEN) {
82  nd_print_trunc(ndo);
83  ndo->ndo_ll_hdr_len += length;
84  return;
85  }
86 
87  if (ndo->ndo_eflag) {
89  if (print_encap_header != NULL)
90  (*print_encap_header)(encap_header_arg);
91  ipoib_hdr_print(ndo, p, length);
92  }
93  orig_length = length;
94 
96  length -= IPOIB_HDRLEN;
97  caplen -= IPOIB_HDRLEN;
98  ether_type = GET_BE_U_2(p + 40);
99  p += IPOIB_HDRLEN;
100 
101  if (ethertype_print(ndo, ether_type, p, length, caplen, NULL, NULL) == 0) {
102  /* ether_type not known, print raw packet */
103  if (!ndo->ndo_eflag) {
104  if (print_encap_header != NULL)
105  (*print_encap_header)(encap_header_arg);
106  ipoib_hdr_print(ndo, orig_hdr , orig_length);
107  }
108 
109  if (!ndo->ndo_suppress_default_print)
110  ND_DEFAULTPRINT(p, caplen);
111  }
112 }
113 
114 /*
115  * This is the top level routine of the printer. 'p' points
116  * to the ether header of the packet, 'h->ts' is the timestamp,
117  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
118  * is the number of bytes actually captured.
119  */
120 void
121 ipoib_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
122 {
123  ndo->ndo_protocol = "ipoib";
124  ipoib_print(ndo, p, h->len, h->caplen, NULL, NULL);
125 }
#define GET_BE_U_2(p)
Definition: extract.h:875
void nd_print_protocol_caps(netdissect_options *)
Definition: util-print.c:421
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
void nd_print_trunc(netdissect_options *)
Definition: util-print.c:409
#define ND_PRINT(...)
Definition: netdissect.h:385
static void ipoib_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen, void(*print_encap_header)(const u_char *), const u_char *encap_header_arg)
Definition: print-ipoib.c:68
void ipoib_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
Definition: print-ipoib.c:121
const struct tok ethertype_values[]
Definition: print-ether.c:52
#define IPOIB_HDRLEN
Definition: print-ipoib.c:41
static void ipoib_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length)
Definition: print-ipoib.c:44
int ndo_suppress_default_print
Definition: netdissect.h:222
const char * ndo_protocol
Definition: netdissect.h:218