summaryrefslogtreecommitdiff
path: root/pfinet/main.c
blob: d85b5ff12982ff44145d74821454f5fc0bc234eb (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
/*
   Copyright (C) 1995,96,97,99,2000 Free Software Foundation, Inc.
   Written by Michael I. Bushnell, p/BSG.

   This file is part of the GNU Hurd.

   The GNU Hurd is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2, or (at
   your option) any later version.

   The GNU Hurd is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. */

#include "pfinet.h"
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <error.h>
#include <argp.h>
#include <hurd/startup.h>
#include <string.h>

#include <linux/netdevice.h>
#include <linux/inet.h>

/* devinet.c */
extern error_t configure_device (struct device *dev,
                                 uint32_t addr, uint32_t netmask);

int trivfs_fstype = FSTYPE_MISC;
int trivfs_fsid;
int trivfs_support_read = 0;
int trivfs_support_write = 0;
int trivfs_support_exec = 0;
int trivfs_allow_open = 0;
struct port_class *trivfs_protid_portclasses[1];
int trivfs_protid_nportclasses = 1;
struct port_class *trivfs_cntl_portclasses[1];
int trivfs_cntl_nportclasses = 1;

struct port_class *shutdown_notify_class;

/* Option parser.  */
extern struct argp pfinet_argp;

int
pfinet_demuxer (mach_msg_header_t *inp,
		mach_msg_header_t *outp)
{
  extern int io_server (mach_msg_header_t *, mach_msg_header_t *);
  extern int socket_server (mach_msg_header_t *, mach_msg_header_t *);
  extern int startup_notify_server (mach_msg_header_t *, mach_msg_header_t *);

  return (io_server (inp, outp)
	  || socket_server (inp, outp)
	  || trivfs_demuxer (inp, outp)
	  || startup_notify_server (inp, outp));
}

/* The system is going down; destroy all the extant port rights.  That
   will cause net channels and such to close promptly.  */
error_t
S_startup_dosync (mach_port_t handle)
{
  struct port_info *inpi = ports_lookup_port (pfinet_bucket, handle,
					      shutdown_notify_class);

  if (!inpi)
    return EOPNOTSUPP;

  ports_class_iterate (socketport_class, ports_destroy_right);
  return 0;
}

void
sigterm_handler (int signo)
{
  ports_class_iterate (socketport_class, ports_destroy_right);
  sleep (10);
  signal (SIGTERM, SIG_DFL);
  raise (SIGTERM);
}

void
arrange_shutdown_notification ()
{
  error_t err;
  mach_port_t initport, notify;
  process_t procserver;
  struct port_info *pi;

  shutdown_notify_class = ports_create_class (0, 0);

  signal (SIGTERM, sigterm_handler);

  /* Arrange to get notified when the system goes down,
     but if we fail for some reason, just silently give up.  No big deal. */

  err = ports_create_port (shutdown_notify_class, pfinet_bucket,
			   sizeof (struct port_info), &pi);
  if (err)
    return;

  procserver = getproc ();
  if (!procserver)
    return;

  err = proc_getmsgport (procserver, 1, &initport);
  mach_port_deallocate (mach_task_self (), procserver);
  if (err)
    return;

  notify = ports_get_send_right (pi);
  ports_port_deref (pi);
  startup_request_notification (initport, notify,
				MACH_MSG_TYPE_MAKE_SEND,
				program_invocation_short_name);
  mach_port_deallocate (mach_task_self (), notify);
  mach_port_deallocate (mach_task_self (), initport);
}

static char *already_open = 0;

/* Return an open device called NAME.  If NMAE is 0, and there is a single
   active device, it is returned, otherwise an error.
   XXX hacky single-interface version. */
error_t
find_device (char *name, struct device **device)
{
  if (already_open)
    if (!name || strcmp (already_open, (*device)->name) == 0)
      {
	*device = &ether_dev;
	return 0;
      }
    else
      return EBUSY;		/* XXXACK */
  else if (! name)
    return ENXIO;		/* XXX */

  name = already_open = strdup (name);

  setup_ethernet_device (name);

  /* Turn on device. */
  dev_open (&ether_dev);

  *device = &ether_dev;

  return 0;
}

/* Call FUN with each active device.  If a call to FUN returns a
   non-zero value, this function will return immediately.  Otherwise 0 is
   returned.
   XXX hacky single-interface version.  */
error_t
enumerate_devices (error_t (*fun) (struct device *dev))
{
  if (already_open)
    return (*fun) (&ether_dev);
  else
    return 0;
}

extern void sk_init (void), skb_init (void);
extern int net_dev_init (void);

int
main (int argc,
      char **argv)
{
  error_t err;
  mach_port_t bootstrap;

  pfinet_bucket = ports_create_bucket ();
  trivfs_protid_portclasses[0] = ports_create_class (trivfs_clean_protid, 0);
  trivfs_cntl_portclasses[0] = ports_create_class (trivfs_clean_cntl, 0);
  addrport_class = ports_create_class (clean_addrport, 0);
  socketport_class = ports_create_class (clean_socketport, 0);
  trivfs_fsid = getpid ();
  mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE,
		      &fsys_identity);

  /* Generic initialization */

  init_time ();
  ethernet_initialize ();
  cthread_detach (cthread_fork (net_bh_worker, 0));

  __mutex_lock (&global_lock);

  prepare_current (1);		/* Set up to call into Linux initialization. */

  sk_init ();
#ifdef SLAB_SKB
  skb_init ();
#endif
  inet_proto_init (0);

  /* This initializes the Linux network device layer, including
     initializing each device on the `dev_base' list.  For us,
     that means just loopback_dev, which will get fully initialized now.
     After this, we can use `register_netdevice' for new interfaces.  */
  net_dev_init ();

  /* ifconfig lo up 127.0.0.1 netmask 0xff000000 */
  configure_device (&loopback_dev,
		    htonl (INADDR_LOOPBACK), htonl (IN_CLASSA_NET));

  __mutex_unlock (&global_lock);

  /* Parse options.  When successful, this configures the interfaces
     before returning; to do so, it will acquire the global_lock.
     (And when not sucessful, it never returns.)  */
  argp_parse (&pfinet_argp, argc, argv, 0,0,0);

  /* Ask init to tell us when the system is going down,
     so we can try to be friendly to our correspondents on the network.  */
  arrange_shutdown_notification ();

  /* Talk to parent and link us in.  */
  task_get_bootstrap_port (mach_task_self (), &bootstrap);
  if (bootstrap == MACH_PORT_NULL)
    error (1, 0, "Must be started as a translator");

  err = trivfs_startup (bootstrap, 0,
			trivfs_cntl_portclasses[0], pfinet_bucket,
			trivfs_protid_portclasses[0], pfinet_bucket, 0);
  if (err)
    error (1, err, "contacting parent");

  /* Launch */
  ports_manage_port_operations_multithread (pfinet_bucket,
					    pfinet_demuxer,
					    0, 0, 0);
  return 0;
}

void
trivfs_modify_stat (struct trivfs_protid *cred,
		    struct stat *st)
{
}

error_t
trivfs_goaway (struct trivfs_control *cntl, int flags)
{
  if (flags & FSYS_GOAWAY_FORCE)
    exit (0);
  else
    {
      /* Stop new requests.  */
      ports_inhibit_class_rpcs (trivfs_cntl_portclasses[0]);
      ports_inhibit_class_rpcs (trivfs_protid_portclasses[0]);
      ports_inhibit_class_rpcs (socketport_class);

      if (ports_count_class (socketport_class) != 0)
	{
	  /* We won't go away, so start things going again...  */
	  ports_enable_class (socketport_class);
	  ports_resume_class_rpcs (trivfs_cntl_portclasses[0]);
	  ports_resume_class_rpcs (trivfs_protid_portclasses[0]);

	  return EBUSY;
	}

      /* There are no sockets, so we can die without breaking anybody
	 too badly.  We don't let user ports on the /servers/socket/2
	 file keep us alive because those get cached in every process
	 that ever makes a PF_INET socket, libc copes with getting
	 MACH_SEND_INVALID_DEST and looking up the new translator.  */
      exit (0);
    }
}