summaryrefslogtreecommitdiff
path: root/pfinet/ethernet.c
blob: ab2d238c171c6e663478a4de33bfd65765094c60 (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
/* 
   Copyright (C) 1995 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 <device/device.h>
#include <device/net_status.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <netinet/in.h>
#include <string.h>

#include "pfinet.h"

static char *ethername;

device_t ether_port;

struct port_class *etherreadclass;
struct port_info *readpt;
mach_port_t readptname;

struct device ether_dev;

struct enet_statistics retbuf;

/* Mach doesn't provide this.  DAMN. */
struct enet_statistics *
ethernet_get_stats (struct device *dev)
{
  return &retbuf;
}

int 
ethernet_stop (struct device *dev)
{
  return 0;
}

void
ethernet_set_multi (struct device *dev, int numaddrs, void *addrs)
{
  assert (numaddrs == 0);
}

static short ether_filter[] = 
{
  NETF_PUSHLIT | NETF_NOP,
  1,
  NETF_PUSHZERO | NETF_OR,
};

static int ether_filter_len = 3;

int
ethernet_open (struct device *dev)
{
  if (ether_port != MACH_PORT_NULL)
    return 0;
  
  etherreadclass = ports_create_class (0, 0);
  readpt = ports_allocate_port (pfinet_bucket, sizeof (struct port_info),
				etherreadclass);
  readptname = ports_get_right (readpt);
  mach_port_insert_right (mach_task_self (), readptname, readptname,
			  MACH_MSG_TYPE_MAKE_SEND);

  device_open (master_device, D_WRITE | D_READ, ethername, &ether_port);

  device_set_filter (ether_port, ports_get_right (readpt), 
		     MACH_MSG_TYPE_MAKE_SEND, NET_HI_PRI,
		     ether_filter, ether_filter_len);
  return 0;
}

int
ethernet_demuxer (mach_msg_header_t *inp,
		  mach_msg_header_t *outp)
{
  struct net_rcv_msg *msg = (struct net_rcv_msg *) inp;
  struct sk_buff *skb;
  int datalen;

  if (inp->msgh_id != NET_RCV_MSG_ID)
    return 0;
  
  if (inp->msgh_local_port != readptname)
    {
      if (inp->msgh_remote_port != MACH_PORT_NULL)
	mach_port_deallocate (mach_task_self (), inp->msgh_remote_port);
      return 1;
    }
  
  datalen = ETH_HLEN 
    + msg->packet_type.msgt_number - sizeof (struct packet_header);

  mutex_lock (&global_lock);
  skb = alloc_skb (datalen, GFP_ATOMIC);
  skb->len = datalen;
  skb->dev = &ether_dev;

  /* Copy the two parts of the frame into the buffer. */
  bcopy (msg->header, skb->data, ETH_HLEN);
  bcopy (msg->packet + sizeof (struct packet_header), 
	 skb->data + ETH_HLEN,
	 datalen - ETH_HLEN);

  /* Drop it on the queue. */
  netif_rx (skb);
  mutex_unlock (&global_lock);

  return 1;
}

/* Transmit an ethernet frame */
int
ethernet_xmit (struct sk_buff *skb, struct device *dev)
{
  u_int count;
  int err;
  
  err = device_write (ether_port, D_NOWAIT, 0, skb->data, skb->len, &count);
  assert (err == 0);
  assert (count == skb->len);
  dev_kfree_skb (skb, FREE_WRITE);
  return 0;
}

void
setup_ethernet_device (char *name)
{
  struct net_status netstat;
  u_int count;
  int net_address[2];
  int i;
  
  ethername = name;

  /* Interface buffers. */
  ether_dev.name = ethername;
  for (i = 0; i < DEV_NUMBUFFS; i++)
    skb_queue_head_init (&ether_dev.buffs[i]);

  /* Functions */
  ether_dev.open = ethernet_open;
  ether_dev.stop = ethernet_stop;
  ether_dev.hard_start_xmit = ethernet_xmit;
  ether_dev.hard_header = eth_header;
  ether_dev.rebuild_header = eth_rebuild_header;
  ether_dev.type_trans = eth_type_trans;
  ether_dev.get_stats = ethernet_get_stats;
  ether_dev.set_multicast_list = ethernet_set_multi;
  
  /* Some more fields */
  ether_dev.type = ARPHRD_ETHER;
  ether_dev.hard_header_len = sizeof (struct ethhdr);
  ether_dev.addr_len = ETH_ALEN;
  for (i = 0; i < 6; i++)
    ether_dev.broadcast[i] = 0xff;
  ether_dev.flags = IFF_BROADCAST | IFF_MULTICAST;
  ether_dev.family = AF_INET;	/* hmm. */
  ether_dev.pa_addr = ether_dev.pa_brdaddr = ether_dev.pa_mask = 0;
  ether_dev.pa_alen = sizeof (unsigned long);

  ethernet_open (&ether_dev);

  /* Fetch hardware information */
  count = NET_STATUS_COUNT;
  device_get_status (ether_port, NET_STATUS, (dev_status_t) &netstat, &count);
  ether_dev.mtu = netstat.max_packet_size;
  assert (netstat.header_format == HDR_ETHERNET);
  assert (netstat.header_size == ETH_HLEN);
  assert (netstat.address_size == ETH_ALEN);

  count = 2;
  assert (count * sizeof (int) >= ETH_ALEN);
  device_get_status (ether_port, NET_ADDRESS, net_address, &count);
  net_address[0] = ntohl (net_address[0]);
  net_address[1] = ntohl (net_address[1]);
  bcopy (net_address, ether_dev.dev_addr, ETH_ALEN);

  /* That should be enough. */

  ether_dev.next = dev_base;
  dev_base = &ether_dev;
}