summaryrefslogtreecommitdiffstats
path: root/proto/ospf/iface.c
blob: 2d53cf5ffe2b348ad57f66f994814744c8ecee48 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
/*
 *	BIRD -- OSPF
 *
 *	(c) 1999 Ondrej Filip <feela@network.cz>
 *
 *	Can be freely distributed and used under the terms of the GNU GPL.
 */

#include "ospf.h"

void
iface_chstate(struct ospf_iface *ifa, u8 state)
{
  struct proto *p;

  p=(struct proto *)(ifa->proto);
  debug("%s: Changing state of iface: %s from %u into %u.\n",
    p->name, ifa->iface->name, ifa->state, state);
  ifa->state=state;
}

void
downint(struct ospf_iface *ifa)
{
  /* FIXME: Delete all neighbors! */
}

void
ospf_int_sm(struct ospf_iface *ifa, int event)
{
  struct proto *p;

  p=(struct proto *)(ifa->proto);

  DBG("%s: SM on iface %s. Event is %d.\n",
    p->name, ifa->iface->name, event);

  switch(event)
  {
    case ISM_UP:
      if(ifa->state==OSPF_IS_DOWN)
      {
        /* Now, nothing should be adjacent */
        restart_hellotim(ifa);
        if((ifa->type==OSPF_IT_PTP) || (ifa->type==OSPF_IT_VLINK))
        {
          iface_chstate(ifa, OSPF_IS_PTP);
        }
        else
        {
          if(ifa->priority==0)
          {
            iface_chstate(ifa, OSPF_IS_DROTHER);
          } 
          else
          {
             iface_chstate(ifa, OSPF_IS_WAITING);
             restart_waittim(ifa);
          }
        }
	addifa_rtlsa(ifa);
      }
      break;
    case ISM_BACKS:
    case ISM_WAITF:
      if(ifa->state==OSPF_IS_WAITING)
      {
        bdr_election(ifa ,p);
      }
      break;
    case ISM_NEICH:
      if((ifa->state==OSPF_IS_DROTHER) || (ifa->state==OSPF_IS_DR) ||
        (ifa->state==OSPF_IS_BACKUP))
      {
        bdr_election(ifa ,p);
      }
    case ISM_DOWN:
      iface_chstate(ifa, OSPF_IS_DOWN);
      downint(ifa);
      break;
    case ISM_LOOP:	/* Useless? */
      iface_chstate(ifa, OSPF_IS_LOOP);
      downint(ifa);
      break;
    case ISM_UNLOOP:
      iface_chstate(ifa, OSPF_IS_DOWN);
      break;
    default:
      die("%s: ISM - Unknown event?",p->name);
      break;
  }
	
}

sock *
ospf_open_mc_socket(struct ospf_iface *ifa)
{
  sock *mcsk;
  struct proto *p;

  p=(struct proto *)(ifa->proto);


  /* FIXME: No NBMA networks now */

  if(ifa->iface->flags & IF_MULTICAST)
  {
    mcsk=sk_new(p->pool);
    mcsk->type=SK_IP_MC;
    mcsk->dport=OSPF_PROTO;
    mcsk->saddr=AllSPFRouters;
    mcsk->daddr=AllSPFRouters;
    mcsk->tos=IP_PREC_INTERNET_CONTROL;
    mcsk->ttl=1;
    mcsk->rx_hook=ospf_rx_hook;
    mcsk->tx_hook=ospf_tx_hook;
    mcsk->err_hook=ospf_err_hook;
    mcsk->iface=ifa->iface;
    mcsk->rbsize=ifa->iface->mtu;
    mcsk->tbsize=ifa->iface->mtu;
    mcsk->data=(void *)ifa;
    if(sk_open(mcsk)!=0)
    {
      DBG("%s: SK_OPEN: mc open failed.\n",p->name);
      return(NULL);
    }
    DBG("%s: SK_OPEN: mc opened.\n",p->name);
    return(mcsk);
  }
  else return(NULL);
}

sock *
ospf_open_ip_socket(struct ospf_iface *ifa)
{
  sock *ipsk;
  struct proto *p;

  p=(struct proto *)(ifa->proto);

  ipsk=sk_new(p->pool);
  ipsk->type=SK_IP;
  ipsk->dport=OSPF_PROTO;
  ipsk->saddr=ifa->iface->addr->ip;
  ipsk->tos=IP_PREC_INTERNET_CONTROL;
  ipsk->ttl=1;
  ipsk->rx_hook=ospf_rx_hook;
  ipsk->tx_hook=ospf_tx_hook;
  ipsk->err_hook=ospf_err_hook;
  ipsk->iface=ifa->iface;
  ipsk->rbsize=ifa->iface->mtu;
  ipsk->tbsize=ifa->iface->mtu;
  ipsk->data=(void *)ifa;
  if(sk_open(ipsk)!=0)
  {
    DBG("%s: SK_OPEN: ip open failed.\n",p->name);
    return(NULL);
  }
  DBG("%s: SK_OPEN: ip opened.\n",p->name);
  return(ipsk);
}

/* 
 * This will later decide, wheter use iface for OSPF or not
 * depending on config
 */
u8
is_good_iface(struct proto *p, struct iface *iface)
{
  if(iface->flags & IF_UP)
  {
    if(!(iface->flags & IF_IGNORE)) return 1;
  }
  return 0;
}

/* Of course, it's NOT true now */
u8
ospf_iface_clasify(struct iface *ifa, struct proto *p)
{
  /* FIXME: Latter I'll use config - this is incorrect */
  DBG("%s: Iface flags=%x.\n", p->name, ifa->flags);
  if((ifa->flags & (IF_MULTIACCESS|IF_MULTICAST))==
    (IF_MULTIACCESS|IF_MULTICAST))
  {
     DBG("%s: Clasifying BCAST.\n", p->name);
     return OSPF_IT_BCAST;
  }
  if((ifa->flags & (IF_MULTIACCESS|IF_MULTICAST))==
    IF_MULTIACCESS)
  {
    DBG("%s: Clasifying NBMA.\n", p->name);
    return OSPF_IT_NBMA;
  }
  DBG("%s: Clasifying P-T-P.\n", p->name);
  return OSPF_IT_PTP;
}

void
ospf_add_timers(struct ospf_iface *ifa, pool *pool)
{
  struct proto *p;

  p=(struct proto *)(ifa->proto);
  /* Add hello timer */
  ifa->hello_timer=tm_new(pool);
  ifa->hello_timer->data=ifa;
  ifa->hello_timer->randomize=0;
  if(ifa->helloint==0) ifa->helloint=HELLOINT_D;
  ifa->hello_timer->hook=hello_timer_hook;
  ifa->hello_timer->recurrent=ifa->helloint;
  DBG("%s: Installing hello timer. (%u)\n", p->name, ifa->helloint);

  ifa->wait_timer=tm_new(pool);
  ifa->wait_timer->data=ifa;
  ifa->wait_timer->randomize=0;
  ifa->wait_timer->hook=wait_timer_hook;
  ifa->wait_timer->recurrent=0;
  if(ifa->waitint==0) ifa->waitint= WAIT_DMH*ifa->helloint;
  DBG("%s: Installing wait timer. (%u)\n", p->name, ifa->waitint);

  if(ifa->rxmtint==0) ifa->rxmtint=RXMTINT_D;
}

void
ospf_iface_default(struct ospf_iface *ifa)
{
  u8 i;

  ifa->oa=NULL;
  ifa->an=0;		/* FIXME This should respect config */
  ifa->cost=COST_D;
  ifa->rxmtint=RXMTINT_D;
  ifa->iftransdelay=IFTRANSDELAY_D;
  ifa->priority=PRIORITY_D;
  ifa->helloint=HELLOINT_D;
  ifa->deadc=DEADC_D;
  ifa->autype=0;
  for(i=0;i<8;i++) ifa->aukey[i]=0;
  ifa->options=2;
  ifa->drip=ipa_from_u32(0x00000000);
  ifa->drid=0;
  ifa->bdrip=ipa_from_u32(0x00000000);
  ifa->bdrid=0;
  ifa->type=ospf_iface_clasify(ifa->iface, (struct proto *)ifa->proto);
}

struct ospf_iface*
find_iface(struct proto_ospf *p, struct iface *what)
{
  struct ospf_iface *i;

  WALK_LIST (i, p->iface_list)
    if ((i)->iface == what)
      return i;
  return NULL;
}

void
ospf_if_notify(struct proto *p, unsigned flags, struct iface *iface)
{
  struct ospf_iface *ifa;
  sock *mcsk;

  struct ospf_config *c;
  c=(struct ospf_config *)(p->cf);

  DBG("%s: If notify called\n", p->name);
  if (iface->flags & IF_IGNORE)
    return;

  if((flags & IF_CHANGE_UP) && is_good_iface(p, iface))
  {
    debug("%s: using interface %s.\n", p->name, iface->name);
    /* FIXME: Latter I'll use config - this is incorrect */
    ifa=mb_alloc(p->pool, sizeof(struct ospf_iface));
    ifa->proto=(struct proto_ospf *)p;
    ifa->iface=iface;
    ospf_iface_default(ifa);
    if(ifa->type!=OSPF_IT_NBMA)
    {
      if((ifa->hello_sk=ospf_open_mc_socket(ifa))==NULL)
      {
        log("%s: Huh? could not open mc socket on interface %s?", p->name,
          iface->name);
	mb_free(ifa);
	log("%s: Ignoring this interface\n", p->name);
	return;
      }

      if((ifa->ip_sk=ospf_open_ip_socket(ifa))==NULL)
      {
        log("%s: Huh? could not open ip socket on interface %s?", p->name,
          iface->name);
	mb_free(ifa);
	log("%s: Ignoring this interface\n", p->name);
	return;
      }

      init_list(&(ifa->neigh_list));
    }
    /* FIXME: This should read config */
    ifa->helloint=0;
    ifa->waitint=0;
    ospf_add_timers(ifa,p->pool);
    add_tail(&((struct proto_ospf *)p)->iface_list, NODE ifa);
    ifa->state=OSPF_IS_DOWN;
    ospf_int_sm(ifa, ISM_UP);
  }

  if(flags & IF_CHANGE_DOWN)
  {
    if((ifa=find_iface((struct proto_ospf *)p, iface))!=NULL)
    {
      debug(" OSPF: killing interface %s.\n", iface->name);
      ospf_int_sm(ifa, ISM_DOWN);
    }
  }

  if(flags & IF_CHANGE_MTU)
  {
    if((ifa=find_iface((struct proto_ospf *)p, iface))!=NULL)
    {
      debug(" OSPF: changing MTU on interface %s.\n", iface->name);
      /* FIXME: change MTU */
    }
  }
}