The Tcpdump Group git mirrors - tcpdump/blob - 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 #include <config.h>
  32
  33 #include "netdissect-stdinc.h"
  34
  35 #include "netdissect.h"
  36 #include "addrtoname.h"
  37 #include "extract.h"
  38
  39 struct msnlb_heartbeat_pkt {
  40         nd_byte     unknown1[4];
  41         nd_byte     unknown2[4];
  42         nd_uint32_t host_prio;  /* little-endian */
  43         nd_ipv4     virtual_ip;
  44         nd_ipv4     host_ip;
  45         /* the protocol is undocumented so we ignore the rest */
  46 };
  47
  48 void
  49 msnlb_print(netdissect_options *ndo, const u_char *bp)
  50 {
  51         const struct msnlb_heartbeat_pkt *hb;
  52
  53         ndo->ndo_protocol = "msnlb";
  54         hb = (const struct msnlb_heartbeat_pkt *)bp;
  55
  56         ND_PRINT("MS NLB heartbeat");
  57         ND_PRINT(", host priority: %u", GET_LE_U_4((hb->host_prio)));
  58         ND_PRINT(", cluster IP: %s", GET_IPADDR_STRING(hb->virtual_ip));
  59         ND_PRINT(", host IP: %s", GET_IPADDR_STRING(hb->host_ip));
  60 }