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, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 #include "qemu-common.h"
22 #include "qemu-char.h"
28 # include <sys/ioctl.h>
31 # include <bluetooth/bluetooth.h>
32 # include <bluetooth/hci.h>
33 # include <bluetooth/hci_lib.h>
36 # define HCI_MAX_FRAME_SIZE 1028
39 struct bt_host_hci_s
{
43 uint8_t hdr
[HCI_MAX_FRAME_SIZE
];
47 static void bt_host_send(struct HCIInfo
*hci
,
48 int type
, const uint8_t *data
, int len
)
50 struct bt_host_hci_s
*s
= (struct bt_host_hci_s
*) hci
;
55 iv
[0].iov_base
= &pkt
;
57 iv
[1].iov_base
= (void *) data
;
60 while ((ret
= writev(s
->fd
, iv
, 2)) < 0)
61 if (errno
!= EAGAIN
&& errno
!= EINTR
) {
62 fprintf(stderr
, "qemu: error %i writing bluetooth packet.\n",
68 static void bt_host_cmd(struct HCIInfo
*hci
, const uint8_t *data
, int len
)
70 bt_host_send(hci
, HCI_COMMAND_PKT
, data
, len
);
73 static void bt_host_acl(struct HCIInfo
*hci
, const uint8_t *data
, int len
)
75 bt_host_send(hci
, HCI_ACLDATA_PKT
, data
, len
);
78 static void bt_host_sco(struct HCIInfo
*hci
, const uint8_t *data
, int len
)
80 bt_host_send(hci
, HCI_SCODATA_PKT
, data
, len
);
83 static int bt_host_read_poll(void *opaque
)
85 struct bt_host_hci_s
*s
= (struct bt_host_hci_s
*) opaque
;
87 return !!s
->hci
.evt_recv
;
90 static void bt_host_read(void *opaque
)
92 struct bt_host_hci_s
*s
= (struct bt_host_hci_s
*) opaque
;
96 /* Seems that we can't read only the header first and then the amount
97 * of data indicated in the header because Linux will discard everything
98 * that's not been read in one go. */
99 s
->len
= read(s
->fd
, s
->hdr
, sizeof(s
->hdr
));
102 fprintf(stderr
, "qemu: error %i reading HCI frame\n", errno
);
113 pktlen
= MIN(pkt
[1] + 2, s
->len
);
114 s
->hci
.evt_recv(s
->hci
.opaque
, pkt
, pktlen
);
118 /* TODO: if this is an Inquiry Result event, it's also
119 * interpreted by Linux kernel before we received it, possibly
120 * we should clean the kernel Inquiry cache through
121 * ioctl(s->fd, HCI_INQUIRY, ...). */
124 case HCI_ACLDATA_PKT
:
128 pktlen
= MIN(((pkt
[3] << 8) | pkt
[2]) + 4, s
->len
);
129 s
->hci
.acl_recv(s
->hci
.opaque
, pkt
, pktlen
);
134 case HCI_SCODATA_PKT
:
138 pktlen
= MIN(pkt
[2] + 3, s
->len
);
144 fprintf(stderr
, "qemu: bad HCI packet type %02x\n", pkt
[-1]);
148 static int bt_host_bdaddr_set(struct HCIInfo
*hci
, const uint8_t *bd_addr
)
153 struct HCIInfo
*bt_host_hci(const char *id
)
155 struct bt_host_hci_s
*s
;
158 int dev_id
= hci_devid(id
);
159 struct hci_filter flt
;
162 fprintf(stderr
, "qemu: `%s' not available\n", id
);
166 fd
= hci_open_dev(dev_id
);
168 /* XXX: can we ensure nobody else has the device opened? */
172 fprintf(stderr
, "qemu: Can't open `%s': %s (%i)\n",
173 id
, strerror(errno
), errno
);
178 hci_filter_clear(&flt
);
179 hci_filter_all_ptypes(&flt
);
180 hci_filter_all_events(&flt
);
182 if (setsockopt(fd
, SOL_HCI
, HCI_FILTER
, &flt
, sizeof(flt
)) < 0) {
183 fprintf(stderr
, "qemu: Can't set HCI filter on socket (%i)\n", errno
);
188 s
= qemu_mallocz(sizeof(struct bt_host_hci_s
));
190 s
->hci
.cmd_send
= bt_host_cmd
;
191 s
->hci
.sco_send
= bt_host_sco
;
192 s
->hci
.acl_send
= bt_host_acl
;
193 s
->hci
.bdaddr_set
= bt_host_bdaddr_set
;
195 qemu_set_fd_handler2(s
->fd
, bt_host_read_poll
, bt_host_read
, 0, s
);
200 struct HCIInfo
*bt_host_hci(const char *id
)
202 fprintf(stderr
, "qemu: bluetooth passthrough not supported (yet)\n");