reactos/lib/drivers/ip/transport/tcp/if.c

   1 /*
   2  * Copyright (c) 1997-1998 University of Utah and the Flux Group.
   3  * All rights reserved.
   4  *
   5  * This file is part of the Flux OSKit.  The OSKit is free software, also known
   6  * as "open source;" you can redistribute it and/or modify it under the terms
   7  * of the GNU General Public License (GPL), version 2, as published by the Free
   8  * Software Foundation (FSF).  To explore alternate licensing terms, contact
   9  * the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
  10  *
  11  * The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
  12  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  13  * FOR A PARTICULAR PURPOSE.  See the GPL for more details.  You should have
  14  * received a copy of the GPL along with the OSKit; see the file COPYING.  If
  15  * not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
  16  */
  17
  18 #include "precomp.h"
  19
  20 int if_index = 0;
  21 struct ifaddr **ifnet_addrs;
  22
  23 int     ifqmaxlen = OSK_IFQ_MAXLEN;
  24 struct  ifnet *ifnet;
  25
  26 /*
  27  * Network interface utility routines.
  28  *
  29  * Routines with ifa_ifwith* names take sockaddr *'s as
  30  * parameters.
  31  */
  32
  33 POSK_IFADDR TCPGetInterfaceData( PIP_INTERFACE IF ) {
  34     NTSTATUS Status;
  35     POSK_IFADDR ifaddr = IF->TCPContext;
  36     ASSERT(ifaddr);
  37
  38     ASSERT_LOCKED(&TCPLock);
  39
  40     RtlZeroMemory(ifaddr, sizeof(OSK_IFADDR) + 2 * sizeof( struct sockaddr_in ));
  41
  42     struct sockaddr_in *addr_in = (struct sockaddr_in *)&ifaddr[1];
  43     struct sockaddr_in *dstaddr_in = (struct sockaddr_in *)&addr_in[1];
  44
  45     TI_DbgPrint(DEBUG_TCPIF,("Called\n"));
  46
  47     ifaddr->ifa_dstaddr = (struct sockaddr *)dstaddr_in;
  48
  49     /* XXX - Point-to-point interfaces not supported yet */
  50     memset( &ifaddr->ifa_dstaddr, 0, sizeof( struct sockaddr ) );
  51
  52     ifaddr->ifa_addr = (struct sockaddr *)addr_in;
  53     Status = GetInterfaceIPv4Address( IF,
  54                       ADE_UNICAST,
  55                       (PULONG)&addr_in->sin_addr.s_addr );
  56
  57     ASSERT(NT_SUCCESS(Status));
  58
  59     TI_DbgPrint(DEBUG_TCPIF,("interface %x : addr %x\n",
  60                IF, addr_in->sin_addr.s_addr));
  61
  62     ifaddr->ifa_flags = 0; /* XXX what goes here? */
  63     ifaddr->ifa_refcnt = 0; /* Anachronistic */
  64     ifaddr->ifa_metric = 1; /* We can get it like in ninfo.c, if we want */
  65     ifaddr->ifa_mtu = IF->MTU;
  66
  67     TI_DbgPrint(DEBUG_TCPIF,("Leaving\n"));
  68
  69     return ifaddr;
  70 }
  71
  72 POSK_IFADDR TCPFindInterface( void *ClientData,
  73                   OSK_UINT AddrType,
  74                   OSK_UINT FindType,
  75                   OSK_SOCKADDR *ReqAddr,
  76                   OSK_IFADDR *Interface ) {
  77     PIP_INTERFACE IF;
  78     IP_ADDRESS Destination;
  79     struct sockaddr_in *addr_in = (struct sockaddr_in *)ReqAddr;
  80     POSK_IFADDR InterfaceData;
  81
  82     ASSERT_LOCKED(&TCPLock);
  83
  84     TI_DbgPrint(DEBUG_TCPIF,("called for type %d\n", FindType));
  85
  86     if( !ReqAddr ) {
  87     TI_DbgPrint(DEBUG_TCPIF,("no addr or no ifaddr (%x)\n", ReqAddr));
  88     return NULL;
  89     }
  90
  91     Destination.Type = IP_ADDRESS_V4;
  92     Destination.Address.IPv4Address = addr_in->sin_addr.s_addr;
  93
  94     TI_DbgPrint(DEBUG_TCPIF,("Address is %x\n", addr_in->sin_addr.s_addr));
  95
  96     IF = FindOnLinkInterface(&Destination);
  97     if (!IF) return NULL;
  98
  99     InterfaceData = TCPGetInterfaceData(IF);
 100
 101     addr_in = (struct sockaddr_in *)
 102     InterfaceData->ifa_addr;
 103
 104     TI_DbgPrint(DEBUG_TCPIF,("returning addr %x\n", addr_in->sin_addr.s_addr));
 105
 106     return InterfaceData;
 107 }
 108