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
ipoib_hdr_print(netdissect_options * ndo,const u_char * bp,u_int length)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
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)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) {
88 nd_print_protocol_caps(ndo);
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
95 ndo->ndo_ll_hdr_len += IPOIB_HDRLEN;
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
ipoib_if_print(netdissect_options * ndo,const struct pcap_pkthdr * h,const u_char * p)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 }
126