The Tcpdump Group git mirrors - tcpdump/blob - print-ipoib.c

   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 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include <netdissect-stdinc.h>
  31
  32 #include <stdio.h>
  33 #include <pcap.h>
  34
  35 #include "netdissect.h"
  36 #include "extract.h"
  37 #include "addrtoname.h"
  38
  39
  40 extern const struct tok ethertype_values[];
  41
  42 #define IPOIB_HDRLEN    44
  43
  44 static inline void
  45 ipoib_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length)
  46 {
  47         uint16_t ether_type;
  48
  49         ether_type = GET_BE_U_2(&bp[40]);
  50         if (!ndo->ndo_qflag) {
  51                 (void)printf(", ethertype %s (0x%04x)",
  52                              tok2str(ethertype_values,"Unknown", ether_type),
  53                              ether_type);
  54         } else {
  55                 (void)printf(", ethertype %s",
  56                              tok2str(ethertype_values,"Unknown", ether_type));
  57         }
  58
  59         (void)printf(", length %u: ", length);
  60 }
  61
  62 /*
  63  * Print an InfiniBand frame.
  64  * This might be encapsulated within another frame; we might be passed
  65  * a pointer to a function that can print header information for that
  66  * frame's protocol, and an argument to pass to that function.
  67  */
  68 static void
  69 ipoib_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen,
  70     void (*print_encap_header)(const u_char *), const u_char *encap_header_arg)
  71 {
  72         const u_char *orig_hdr = p;
  73         u_int orig_length;
  74         u_short ether_type;
  75
  76         if (caplen < IPOIB_HDRLEN || length < IPOIB_HDRLEN) {
  77                 printf("[|ipoib]");
  78                 return;
  79         }
  80
  81         if (ndo->ndo_eflag) {
  82                 if (print_encap_header != NULL)
  83                         (*print_encap_header)(encap_header_arg);
  84                 ipoib_hdr_print(ndo, p, length);
  85         }
  86         orig_length = length;
  87
  88         length -= IPOIB_HDRLEN;
  89         caplen -= IPOIB_HDRLEN;
  90         ether_type = GET_BE_U_2(&p[40]);
  91         p += IPOIB_HDRLEN;
  92
  93         if (ethertype_print(ndo, ether_type, p, length, caplen, NULL, NULL) == 0) {
  94                 /* ether_type not known, print raw packet */
  95                 if (!ndo->ndo_eflag) {
  96                         if (print_encap_header != NULL)
  97                                 (*print_encap_header)(encap_header_arg);
  98                         ipoib_hdr_print(ndo, orig_hdr , orig_length);
  99                 }
 100
 101                 if (!ndo->ndo_suppress_default_print)
 102                         ND_DEFAULTPRINT(p, caplen);
 103         }
 104 }
 105
 106 /*
 107  * This is the top level routine of the printer.  'p' points
 108  * to the ether header of the packet, 'h->ts' is the timestamp,
 109  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 110  * is the number of bytes actually captured.
 111  */
 112 u_int
 113 ipoib_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
 114 {
 115         ipoib_print(ndo, p, h->len, h->caplen, NULL, NULL);
 116
 117         return (IPOIB_HDRLEN);
 118 }
 119
 120 /*
 121  * Local Variables:
 122  * c-style: whitesmith
 123  * c-basic-offset: 8
 124  * End:
 125  */