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-common.h"
21 #include "sysemu/bt.h"
22 #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");