reactos/lib/drivers/lwip/src/netif/loopif.c

   1 /**
   2  * @file
   3  * Loop Interface
   4  *
   5  */
   6
   7 /*
   8  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without modification,
  12  * are permitted provided that the following conditions are met:
  13  *
  14  * 1. Redistributions of source code must retain the above copyright notice,
  15  *    this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright notice,
  17  *    this list of conditions and the following disclaimer in the documentation
  18  *    and/or other materials provided with the distribution.
  19  * 3. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  25  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  26  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  27  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  30  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  31  * OF SUCH DAMAGE.
  32  *
  33  * This file is part of the lwIP TCP/IP stack.
  34  *
  35  * Author: Adam Dunkels <adam@sics.se>
  36  *
  37  */
  38 #include "lwip/opt.h"
  39
  40 #if LWIP_HAVE_LOOPIF
  41
  42 #include "netif/loopif.h"
  43 #include "lwip/snmp.h"
  44
  45 /**
  46  * Initialize a lwip network interface structure for a loopback interface
  47  *
  48  * @param netif the lwip network interface structure for this loopif
  49  * @return ERR_OK if the loopif is initialized
  50  *         ERR_MEM if private data couldn't be allocated
  51  */
  52 err_t
  53 loopif_init(struct netif *netif)
  54 {
  55   /* initialize the snmp variables and counters inside the struct netif
  56    * ifSpeed: no assumption can be made!
  57    */
  58   NETIF_INIT_SNMP(netif, snmp_ifType_softwareLoopback, 0);
  59
  60   netif->name[0] = 'l';
  61   netif->name[1] = 'o';
  62   netif->output = netif_loop_output;
  63   return ERR_OK;
  64 }
  65
  66 #endif /* LWIP_HAVE_LOOPIF */