wvipsec/wvipsecguide.cc

   1 /*
   2  * Worldvisions Weaver Software:
   3  *   Copyright (C) 1997-2002 Net Integration Technologies, Inc.
   4  *
   5  * WvIpSecGuide is a "gateway" object that groups all the routes
   6  *  belonging to one IPSec Tunnel.
   7  */
   8
   9 #include "wvesp.h"
  10 #include "wvipsecguide.h"
  11 #include "wvipseckeeper.h"
  12 #include "wvisakmp.h"
  13 #include "wvcrypto.h"
  14 #include "wvtundev.h"
  15 #include <assert.h>
  16 #include <time.h>
  17
  18 WvIpSecGuide::WvIpSecGuide(WvIpSecKeeper *_parent, const WvIPAddr &_gateway)
  19     : WvNGRouteContainer(_parent), cfg(_parent->cfg), keeper(*_parent),
  20     log("WvIpSecGuide", WvLog::Debug3)
  21 {
  22     log("Constructor\n");
  23
  24     isakmp = NULL;
  25     esp = NULL;
  26
  27     WvIPAddr addr(cfg.get("Global", "IPAddr", "192.168.42.42"));
  28     tundev = new WvTunDev(addr, 1400 /*mtu*/);
  29
  30     net() = _gateway;
  31     gateway() = _gateway;
  32     metric() = METRIC_TUNNEL;
  33     ifcname() = tundev->ifcname;
  34
  35     keeper.selectlist.append(&selectlist, false);
  36
  37     last_probe_time = 0;
  38 }
  39
  40 WvIpSecGuide::~WvIpSecGuide()
  41 {
  42     log("Destructor\n");
  43
  44     if (isakmp != NULL)
  45     {
  46         selectlist.unlink(isakmp);
  47         delete isakmp;
  48         isakmp = NULL;
  49     }
  50
  51     if (esp != NULL)
  52     {
  53         delete esp;
  54         esp = NULL;
  55     }
  56
  57     delete tundev;
  58 }
  59
  60 void WvIpSecGuide::changed_sa(int spi, WvCryptoEncoder *enc,
  61                     WvCryptoEncoder *dec, WvIsaKmp::actions action)
  62 {
  63     log("change_sa()\n");
  64
  65     switch (action)
  66     {
  67     case WvIsaKmp::Create:
  68         if (esp)
  69             selectlist.seterr("Multiple esp connections not supported!\n");
  70         else
  71         {
  72             esp = new WvEsp(this, cfg);
  73             esp->set_spi(spi);
  74             esp->set_cryptcoders(enc, dec);
  75             esp->set_tundev(tundev);
  76             // shouldn't have to add to selectlist, cause that already happens
  77             // and WvEsp isn't a stream anyways :)
  78         }
  79         break;
  80     case WvIsaKmp::Change:
  81         break;
  82     case WvIsaKmp::Delete:
  83         if (esp)
  84         {
  85             delete esp;
  86             esp = NULL;
  87         }
  88         else
  89         {
  90             selectlist.seterr("Something fishy - trying to delete non-existant esp!\n");
  91         }
  92         break;
  93     default:
  94         log(WvLog::Error, "How did we get here??");
  95         selectlist.seterr("Weasels are NOT funny!\n");
  96     }
  97 }
  98
  99 void WvIpSecGuide::create_routes()
 100 {
 101
 102 }
 103
 104 void WvIpSecGuide::forget_my_routes()
 105 {
 106
 107 }
 108
 109 void WvIpSecGuide::start_isakmp()
 110 {
 111     WvString localaddr = cfg.get("Global", "IPAddr", "192.168.42.42");
 112     WvString remoteaddr = cfg.get("WvIpSec", "connection", "10.1.0.10");
 113     WvString shared_secret = cfg.get("WvIpSec", "Preshared key", NULL);
 114
 115     isakmp = new WvIsaKmp(cfg, true, shared_secret, localaddr, remoteaddr);
 116     isakmp->set_espcallback(WvIsaKmp::EspCallback(this, &WvIpSecGuide::changed_sa));
 117     selectlist.append(isakmp, true);
 118 }