forked from camthesaxman/qemu-irix
-
Notifications
You must be signed in to change notification settings - Fork 4
/
bt-vhci.c
168 lines (142 loc) · 4.49 KB
/
bt-vhci.c
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
/*
* Support for host VHCIs inside qemu scatternets.
*
* Copyright (C) 2008 Andrzej Zaborowski <[email protected]>
*
* This program 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) version 3 of the License.
*
* This program 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, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "sysemu/bt.h"
#include "hw/bt.h"
#include "qemu/main-loop.h"
#define VHCI_DEV "/dev/vhci"
#define VHCI_UDEV "/dev/hci_vhci"
struct bt_vhci_s {
int fd;
struct HCIInfo *info;
uint8_t hdr[4096];
int len;
};
static void vhci_read(void *opaque)
{
struct bt_vhci_s *s = (struct bt_vhci_s *) opaque;
uint8_t *pkt;
int pktlen;
/* Seems that we can't read only the header first and then the amount
* of data indicated in the header because Linux will discard everything
* that's not been read in one go. */
s->len = read(s->fd, s->hdr, sizeof(s->hdr));
if (s->len < 0) {
fprintf(stderr, "qemu: error %i reading the PDU\n", errno);
return;
}
pkt = s->hdr;
while (s->len --)
switch (*pkt ++) {
case HCI_COMMAND_PKT:
if (s->len < 3)
goto bad_pkt;
pktlen = MIN(pkt[2] + 3, s->len);
s->info->cmd_send(s->info, pkt, pktlen);
s->len -= pktlen;
pkt += pktlen;
break;
case HCI_ACLDATA_PKT:
if (s->len < 4)
goto bad_pkt;
pktlen = MIN(((pkt[3] << 8) | pkt[2]) + 4, s->len);
s->info->acl_send(s->info, pkt, pktlen);
s->len -= pktlen;
pkt += pktlen;
break;
case HCI_SCODATA_PKT:
if (s->len < 3)
goto bad_pkt;
pktlen = MIN(pkt[2] + 3, s->len);
s->info->sco_send(s->info, pkt, pktlen);
s->len -= pktlen;
pkt += pktlen;
break;
default:
bad_pkt:
fprintf(stderr, "qemu: bad HCI packet type %02x\n", pkt[-1]);
}
}
static void vhci_host_send(void *opaque,
int type, const uint8_t *data, int len)
{
struct bt_vhci_s *s = (struct bt_vhci_s *) opaque;
#if 0
uint8_t pkt = type;
struct iovec iv[2];
iv[0].iov_base = &pkt;
iv[0].iov_len = 1;
iv[1].iov_base = (void *) data;
iv[1].iov_len = len;
while (writev(s->fd, iv, 2) < 0)
if (errno != EAGAIN && errno != EINTR) {
fprintf(stderr, "qemu: error %i writing bluetooth packet.\n",
errno);
return;
}
#else
/* Apparently VHCI wants us to write everything in one chunk :-( */
static uint8_t buf[4096];
buf[0] = type;
memcpy(buf + 1, data, len);
while (write(s->fd, buf, len + 1) < 0)
if (errno != EAGAIN && errno != EINTR) {
fprintf(stderr, "qemu: error %i writing bluetooth packet.\n",
errno);
return;
}
#endif
}
static void vhci_out_hci_packet_event(void *opaque,
const uint8_t *data, int len)
{
vhci_host_send(opaque, HCI_EVENT_PKT, data, len);
}
static void vhci_out_hci_packet_acl(void *opaque,
const uint8_t *data, int len)
{
vhci_host_send(opaque, HCI_ACLDATA_PKT, data, len);
}
void bt_vhci_init(struct HCIInfo *info)
{
struct bt_vhci_s *s;
int err[2];
int fd;
fd = open(VHCI_DEV, O_RDWR);
err[0] = errno;
if (fd < 0) {
fd = open(VHCI_UDEV, O_RDWR);
err[1] = errno;
}
if (fd < 0) {
fprintf(stderr, "qemu: Can't open `%s': %s (%i)\n",
VHCI_DEV, strerror(err[0]), err[0]);
fprintf(stderr, "qemu: Can't open `%s': %s (%i)\n",
VHCI_UDEV, strerror(err[1]), err[1]);
exit(-1);
}
s = g_malloc0(sizeof(struct bt_vhci_s));
s->fd = fd;
s->info = info ?: qemu_next_hci();
s->info->opaque = s;
s->info->evt_recv = vhci_out_hci_packet_event;
s->info->acl_recv = vhci_out_hci_packet_acl;
qemu_set_fd_handler(s->fd, vhci_read, NULL, s);
}