contrib/tcpdump/print-msnlb.c

   1 /*
   2  * Copyright (c) 2013 Romain Francoise <romain@orebokech.com>
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  * 3. Neither the name of the project nor the names of its contributors
  13  *    may be used to endorse or promote products derived from this software
  14  *    without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 /* \summary: MS Network Load Balancing's (NLB) heartbeat printer */
  30
  31 #ifdef HAVE_CONFIG_H
  32 #include "config.h"
  33 #endif
  34
  35 #include <netdissect-stdinc.h>
  36
  37 #include "netdissect.h"
  38 #include "addrtoname.h"
  39 #include "extract.h"
  40
  41 struct msnlb_heartbeat_pkt {
  42         uint32_t unknown1;
  43         uint32_t unknown2;
  44         uint32_t host_prio;     /* little-endian */
  45         uint32_t virtual_ip;
  46         uint32_t host_ip;
  47         /* the protocol is undocumented so we ignore the rest */
  48 };
  49
  50 void
  51 msnlb_print(netdissect_options *ndo, const u_char *bp)
  52 {
  53         const struct msnlb_heartbeat_pkt *hb;
  54
  55         hb = (const struct msnlb_heartbeat_pkt *)bp;
  56         ND_TCHECK(*hb);
  57
  58         ND_PRINT((ndo, "MS NLB heartbeat, host priority: %u,",
  59                 EXTRACT_LE_32BITS(&(hb->host_prio))));
  60         ND_PRINT((ndo, " cluster IP: %s,", ipaddr_string(ndo, &(hb->virtual_ip))));
  61         ND_PRINT((ndo, " host IP: %s", ipaddr_string(ndo, &(hb->host_ip))));
  62         return;
  63 trunc:
  64         ND_PRINT((ndo, "[|MS NLB]"));
  65 }