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 #include <config.h>
29
30 #include "netdissect-stdinc.h"
31
32 #include "netdissect.h"
33 #include "extract.h"
34 #include "addrtoname.h"
35
36
37 extern const struct tok ethertype_values[];
38
39 #define IPOIB_HDRLEN 44
40
41 static inline void
ipoib_hdr_print(netdissect_options * ndo,const u_char * bp,u_int length)42 ipoib_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length)
43 {
44 uint16_t ether_type;
45
46 ether_type = GET_BE_U_2(bp + 40);
47 if (!ndo->ndo_qflag) {
48 ND_PRINT(", ethertype %s (0x%04x)",
49 tok2str(ethertype_values,"Unknown", ether_type),
50 ether_type);
51 } else {
52 ND_PRINT(", ethertype %s",
53 tok2str(ethertype_values,"Unknown", ether_type));
54 }
55
56 ND_PRINT(", length %u: ", length);
57 }
58
59 /*
60 * Print an InfiniBand frame.
61 * This might be encapsulated within another frame; we might be passed
62 * a pointer to a function that can print header information for that
63 * frame's protocol, and an argument to pass to that function.
64 */
65 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)66 ipoib_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen,
67 void (*print_encap_header)(const u_char *), const u_char *encap_header_arg)
68 {
69 const u_char *orig_hdr = p;
70 u_int orig_length;
71 u_short ether_type;
72
73 if (caplen < IPOIB_HDRLEN) {
74 nd_print_trunc(ndo);
75 ndo->ndo_ll_hdr_len += caplen;
76 return;
77 }
78
79 if (length < IPOIB_HDRLEN) {
80 nd_print_trunc(ndo);
81 ndo->ndo_ll_hdr_len += length;
82 return;
83 }
84
85 if (ndo->ndo_eflag) {
86 nd_print_protocol_caps(ndo);
87 if (print_encap_header != NULL)
88 (*print_encap_header)(encap_header_arg);
89 ipoib_hdr_print(ndo, p, length);
90 }
91 orig_length = length;
92
93 ndo->ndo_ll_hdr_len += IPOIB_HDRLEN;
94 length -= IPOIB_HDRLEN;
95 caplen -= IPOIB_HDRLEN;
96 ether_type = GET_BE_U_2(p + 40);
97 p += IPOIB_HDRLEN;
98
99 if (ethertype_print(ndo, ether_type, p, length, caplen, NULL, NULL) == 0) {
100 /* ether_type not known, print raw packet */
101 if (!ndo->ndo_eflag) {
102 if (print_encap_header != NULL)
103 (*print_encap_header)(encap_header_arg);
104 ipoib_hdr_print(ndo, orig_hdr , orig_length);
105 }
106
107 if (!ndo->ndo_suppress_default_print)
108 ND_DEFAULTPRINT(p, caplen);
109 }
110 }
111
112 /*
113 * This is the top level routine of the printer. 'p' points
114 * to the ether header of the packet, 'h->ts' is the timestamp,
115 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
116 * is the number of bytes actually captured.
117 */
118 void
ipoib_if_print(netdissect_options * ndo,const struct pcap_pkthdr * h,const u_char * p)119 ipoib_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
120 {
121 ndo->ndo_protocol = "ipoib";
122 ipoib_print(ndo, p, h->len, h->caplen, NULL, NULL);
123 }
124