reactos/drivers/lib/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 PVOID TCPPrepareInterface( PIP_INTERFACE IF ) {
  34     NTSTATUS Status;
  35     POSK_IFADDR ifaddr = exAllocatePool
  36         ( NonPagedPool, sizeof(*ifaddr) + 2 * sizeof( struct sockaddr_in ) );
  37     struct sockaddr_in *addr_in = (struct sockaddr_in *)&ifaddr[1];
  38     struct sockaddr_in *dstaddr_in = (struct sockaddr_in *)&addr_in[1];
  39     if( !ifaddr ) return NULL;
  40
  41     TI_DbgPrint(DEBUG_TCPIF,("Called\n"));
  42
  43     ifaddr->ifa_dstaddr = (struct sockaddr *)dstaddr_in;
  44     /* XXX - Point-to-point interfaces not supported yet */
  45     memset( &ifaddr->ifa_dstaddr, 0, sizeof( struct sockaddr ) );
  46
  47     ifaddr->ifa_addr = (struct sockaddr *)addr_in;
  48     Status = GetInterfaceIPv4Address( IF,
  49                                       ADE_UNICAST,
  50                                       (PULONG)&addr_in->sin_addr.s_addr );
  51
  52     if( !NT_SUCCESS(Status) )
  53         addr_in->sin_addr.s_addr = 0;
  54
  55     TI_DbgPrint(DEBUG_TCPIF,("Prepare interface %x : addr %x\n",
  56                            IF, addr_in->sin_addr.s_addr));
  57
  58     ifaddr->ifa_flags = 0; /* XXX what goes here? */
  59     ifaddr->ifa_refcnt = 0; /* Anachronistic */
  60     ifaddr->ifa_metric = 1; /* We can get it like in ninfo.c, if we want */
  61     ifaddr->ifa_mtu = IF->MTU;
  62
  63     TI_DbgPrint(DEBUG_TCPIF,("Leaving\n"));
  64
  65     return ifaddr;
  66 }
  67
  68 VOID TCPDisposeInterfaceData( PVOID Ptr ) {
  69     exFreePool( Ptr );
  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     PNEIGHBOR_CACHE_ENTRY NCE;
  78     IP_ADDRESS Destination;
  79     struct sockaddr_in *addr_in = (struct sockaddr_in *)ReqAddr;
  80
  81     TI_DbgPrint(DEBUG_TCPIF,("called for type %d\n", FindType));
  82
  83     if( !ReqAddr ) {
  84         TI_DbgPrint(DEBUG_TCPIF,("no addr or no ifaddr (%x)\n", ReqAddr));
  85         return NULL;
  86     }
  87
  88     Destination.Type = IP_ADDRESS_V4;
  89     Destination.Address.IPv4Address = addr_in->sin_addr.s_addr;
  90
  91     TI_DbgPrint(DEBUG_TCPIF,("Address is %x\n", addr_in->sin_addr.s_addr));
  92
  93     NCE = RouteGetRouteToDestination(&Destination);
  94
  95     if( !NCE || !NCE->Interface ) {
  96         TI_DbgPrint(DEBUG_TCPIF,("no neighbor cache or no interface (%x %x)\n",
  97                                NCE, NCE ? NCE->Interface : 0));
  98         return NULL;
  99     }
 100
 101     TI_DbgPrint(DEBUG_TCPIF,("NCE: %x\n", NCE));
 102     TI_DbgPrint(DEBUG_TCPIF,("NCE->Interface: %x\n", NCE->Interface));
 103     TI_DbgPrint(DEBUG_TCPIF,("NCE->Interface->TCPContext: %x\n",
 104                            NCE->Interface->TCPContext));
 105
 106     addr_in = (struct sockaddr_in *)
 107         ((POSK_IFADDR)NCE->Interface->TCPContext)->ifa_addr;
 108     TI_DbgPrint(DEBUG_TCPIF,("returning addr %x\n", addr_in->sin_addr.s_addr));
 109
 110     return NCE->Interface->TCPContext;
 111 }
 112