2 * Wrap a host Bluetooth HCI socket in a struct HCIInfo.
4 * Copyright (C) 2008 Andrzej Zaborowski <balrog@zabor.org>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 or
9 * (at your option) version 3 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, see <http://www.gnu.org/licenses/>.
20 #include "qemu/osdep.h"
21 #include "qemu-common.h"
22 #include "sysemu/bt.h"
23 #include "qemu/main-loop.h"
26 # include <sys/ioctl.h>
29 # include <bluetooth/bluetooth.h>
30 # include <bluetooth/hci.h>
31 # include <bluetooth/hci_lib.h>
34 # define HCI_MAX_FRAME_SIZE 1028
37 struct bt_host_hci_s
{
41 uint8_t hdr
[HCI_MAX_FRAME_SIZE
];
45 static void bt_host_send(struct HCIInfo
*hci
,
46 int type
, const uint8_t *data
, int len
)
48 struct bt_host_hci_s
*s
= (struct bt_host_hci_s
*) hci
;
52 iv
[0].iov_base
= (void *)&pkt
;
54 iv
[1].iov_base
= (void *) data
;
57 while (writev(s
->fd
, iv
, 2) < 0) {
58 if (errno
!= EAGAIN
&& errno
!= EINTR
) {
59 fprintf(stderr
, "qemu: error %i writing bluetooth packet.\n",
66 static void bt_host_cmd(struct HCIInfo
*hci
, const uint8_t *data
, int len
)
68 bt_host_send(hci
, HCI_COMMAND_PKT
, data
, len
);
71 static void bt_host_acl(struct HCIInfo
*hci
, const uint8_t *data
, int len
)
73 bt_host_send(hci
, HCI_ACLDATA_PKT
, data
, len
);
76 static void bt_host_sco(struct HCIInfo
*hci
, const uint8_t *data
, int len
)
78 bt_host_send(hci
, HCI_SCODATA_PKT
, data
, len
);
81 static void bt_host_read(void *opaque
)
83 struct bt_host_hci_s
*s
= (struct bt_host_hci_s
*) opaque
;
87 /* Seems that we can't read only the header first and then the amount
88 * of data indicated in the header because Linux will discard everything
89 * that's not been read in one go. */
90 s
->len
= read(s
->fd
, s
->hdr
, sizeof(s
->hdr
));
93 fprintf(stderr
, "qemu: error %i reading HCI frame\n", errno
);
104 pktlen
= MIN(pkt
[1] + 2, s
->len
);
105 s
->hci
.evt_recv(s
->hci
.opaque
, pkt
, pktlen
);
109 /* TODO: if this is an Inquiry Result event, it's also
110 * interpreted by Linux kernel before we received it, possibly
111 * we should clean the kernel Inquiry cache through
112 * ioctl(s->fd, HCI_INQUIRY, ...). */
115 case HCI_ACLDATA_PKT
:
119 pktlen
= MIN(((pkt
[3] << 8) | pkt
[2]) + 4, s
->len
);
120 s
->hci
.acl_recv(s
->hci
.opaque
, pkt
, pktlen
);
125 case HCI_SCODATA_PKT
:
129 pktlen
= MIN(pkt
[2] + 3, s
->len
);
136 fprintf(stderr
, "qemu: bad HCI packet type %02x\n", pkt
[-1]);
140 static int bt_host_bdaddr_set(struct HCIInfo
*hci
, const uint8_t *bd_addr
)
145 struct HCIInfo
*bt_host_hci(const char *id
)
147 struct bt_host_hci_s
*s
;
150 int dev_id
= hci_devid(id
);
151 struct hci_filter flt
;
154 fprintf(stderr
, "qemu: `%s' not available\n", id
);
158 fd
= hci_open_dev(dev_id
);
160 /* XXX: can we ensure nobody else has the device opened? */
164 fprintf(stderr
, "qemu: Can't open `%s': %s (%i)\n",
165 id
, strerror(errno
), errno
);
170 hci_filter_clear(&flt
);
171 hci_filter_all_ptypes(&flt
);
172 hci_filter_all_events(&flt
);
174 if (qemu_setsockopt(fd
, SOL_HCI
, HCI_FILTER
, &flt
, sizeof(flt
)) < 0) {
175 fprintf(stderr
, "qemu: Can't set HCI filter on socket (%i)\n", errno
);
180 s
= g_malloc0(sizeof(struct bt_host_hci_s
));
182 s
->hci
.cmd_send
= bt_host_cmd
;
183 s
->hci
.sco_send
= bt_host_sco
;
184 s
->hci
.acl_send
= bt_host_acl
;
185 s
->hci
.bdaddr_set
= bt_host_bdaddr_set
;
187 qemu_set_fd_handler(s
->fd
, bt_host_read
, NULL
, s
);
192 struct HCIInfo
*bt_host_hci(const char *id
)
194 fprintf(stderr
, "qemu: bluetooth passthrough not supported (yet)\n");