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
|
/* $OpenBSD: netif.c,v 1.14 2022/12/27 07:34:05 jca Exp $ */
/* $NetBSD: netif.c,v 1.7 1996/10/13 02:29:03 christos Exp $ */
/*
* Copyright (c) 1993 Adam Glass
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Adam Glass.
* 4. The name of the Author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Adam Glass ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/mount.h>
#include <netinet/in.h>
#include "stand.h"
#include "net.h"
#include "netif.h"
struct iodesc sockets[SOPEN_MAX];
#ifdef NETIF_DEBUG
int netif_debug = 0;
#endif
/*
* netif_init:
*
* initialize the generic network interface layer
*/
void
netif_init(void)
{
struct netif_driver *drv;
int d, i;
#ifdef NETIF_DEBUG
if (netif_debug)
printf("netif_init: called\n");
#endif
for (d = 0; d < n_netif_drivers; d++) {
drv = netif_drivers[d];
for (i = 0; i < drv->netif_nifs; i++)
drv->netif_ifs[i].dif_used = 0;
}
}
static int
netif_match(struct netif *nif, void *machdep_hint)
{
struct netif_driver *drv = nif->nif_driver;
#if 0
if (netif_debug)
printf("%s%d: netif_match (%d)\n", drv->netif_bname,
nif->nif_unit, nif->nif_sel);
#endif
return drv->netif_match(nif, machdep_hint);
}
struct netif *
netif_select(void *machdep_hint)
{
int d, u, s;
struct netif_driver *drv;
struct netif cur_if;
static struct netif best_if;
int best_val;
int val;
best_val = 0;
best_if.nif_driver = NULL;
#ifdef NETIF_DEBUG
if (netif_debug)
printf("netif_select: %d interfaces\n", n_netif_drivers);
#endif
for (d = 0; d < n_netif_drivers; d++) {
cur_if.nif_driver = netif_drivers[d];
drv = cur_if.nif_driver;
for (u = 0; u < drv->netif_nifs; u++) {
cur_if.nif_unit = u;
#ifdef NETIF_DEBUG
if (netif_debug)
printf("\t%s%d:", drv->netif_bname,
cur_if.nif_unit);
#endif
for (s = 0; s < drv->netif_ifs[u].dif_nsel; s++) {
cur_if.nif_sel = s;
if (drv->netif_ifs[u].dif_used & (1 << s)) {
#ifdef NETIF_DEBUG
if (netif_debug)
printf(" [%d used]", s);
#endif
continue;
}
val = netif_match(&cur_if, machdep_hint);
#ifdef NETIF_DEBUG
if (netif_debug)
printf(" [%d -> %d]", s, val);
#endif
if (val > best_val) {
best_val = val;
best_if = cur_if;
}
}
#ifdef NETIF_DEBUG
if (netif_debug)
printf("\n");
#endif
}
}
if (best_if.nif_driver == NULL)
return NULL;
best_if.nif_driver->netif_ifs[best_if.nif_unit].dif_used |=
(1 << best_if.nif_sel);
#ifdef NETIF_DEBUG
if (netif_debug)
printf("netif_select: %s%d(%d) wins\n",
best_if.nif_driver->netif_bname,
best_if.nif_unit, best_if.nif_sel);
#endif
return &best_if;
}
int
netif_probe(struct netif *nif, void *machdep_hint)
{
struct netif_driver *drv = nif->nif_driver;
#ifdef NETIF_DEBUG
if (netif_debug)
printf("%s%d: netif_probe\n", drv->netif_bname, nif->nif_unit);
#endif
return drv->netif_probe(nif, machdep_hint);
}
void
netif_attach(struct netif *nif, struct iodesc *desc, void *machdep_hint)
{
struct netif_driver *drv = nif->nif_driver;
#ifdef NETIF_DEBUG
if (netif_debug)
printf("%s%d: netif_attach\n", drv->netif_bname, nif->nif_unit);
#endif
desc->io_netif = nif;
#ifdef PARANOID
if (drv->netif_init == NULL)
panic("%s%d: no netif_init support", drv->netif_bname,
nif->nif_unit);
#endif
drv->netif_init(desc, machdep_hint);
bzero(drv->netif_ifs[nif->nif_unit].dif_stats,
sizeof(struct netif_stats));
}
void
netif_detach(struct netif *nif)
{
struct netif_driver *drv = nif->nif_driver;
#ifdef NETIF_DEBUG
if (netif_debug)
printf("%s%d: netif_detach\n", drv->netif_bname, nif->nif_unit);
#endif
#ifdef PARANOID
if (drv->netif_end == NULL)
panic("%s%d: no netif_end support", drv->netif_bname,
nif->nif_unit);
#endif
drv->netif_end(nif);
}
ssize_t
netif_get(struct iodesc *desc, void *pkt, size_t len, time_t timo)
{
#ifdef NETIF_DEBUG
struct netif *nif = desc->io_netif;
#endif
struct netif_driver *drv = desc->io_netif->nif_driver;
ssize_t rv;
#ifdef NETIF_DEBUG
if (netif_debug)
printf("%s%d: netif_get\n", drv->netif_bname, nif->nif_unit);
#endif
#ifdef PARANOID
if (drv->netif_get == NULL)
panic("%s%d: no netif_get support", drv->netif_bname,
nif->nif_unit);
#endif
rv = drv->netif_get(desc, pkt, len, timo);
#ifdef NETIF_DEBUG
if (netif_debug)
printf("%s%d: netif_get returning %d\n", drv->netif_bname,
nif->nif_unit, rv);
#endif
return rv;
}
ssize_t
netif_put(struct iodesc *desc, void *pkt, size_t len)
{
#ifdef NETIF_DEBUG
struct netif *nif = desc->io_netif;
#endif
struct netif_driver *drv = desc->io_netif->nif_driver;
ssize_t rv;
#ifdef NETIF_DEBUG
if (netif_debug)
printf("%s%d: netif_put\n", drv->netif_bname, nif->nif_unit);
#endif
#ifdef PARANOID
if (drv->netif_put == NULL)
panic("%s%d: no netif_put support", drv->netif_bname,
nif->nif_unit);
#endif
rv = drv->netif_put(desc, pkt, len);
#ifdef NETIF_DEBUG
if (netif_debug)
printf("%s%d: netif_put returning %d\n", drv->netif_bname,
nif->nif_unit, rv);
#endif
return rv;
}
struct iodesc *
socktodesc(int sock)
{
if (sock >= SOPEN_MAX) {
errno = EBADF;
return (NULL);
}
return (&sockets[sock]);
}
int
netif_open(void *machdep_hint)
{
int fd;
struct iodesc *s;
struct netif *nif;
/* find a free socket */
for (fd = 0, s = sockets; fd < SOPEN_MAX; fd++, s++)
if (s->io_netif == NULL)
goto fnd;
errno = EMFILE;
return (-1);
fnd:
bzero(s, sizeof(*s));
netif_init();
nif = netif_select(machdep_hint);
if (!nif)
panic("netboot: no interfaces left untried");
if (netif_probe(nif, machdep_hint)) {
printf("netboot: couldn't probe %s%d\n",
nif->nif_driver->netif_bname, nif->nif_unit);
errno = EINVAL;
return(-1);
}
netif_attach(nif, s, machdep_hint);
return(fd);
}
int
netif_close(int sock)
{
if (sock >= SOPEN_MAX) {
errno = EBADF;
return(-1);
}
netif_detach(sockets[sock].io_netif);
sockets[sock].io_netif = NULL;
return(0);
}
|
