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 "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;
54 iv[0].iov_base = (void *)&pkt;
56 iv[1].iov_base = (void *) data;
59 while (writev(s->fd, iv, 2) < 0) {
60 if (errno != EAGAIN && errno != EINTR) {
61 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 void bt_host_read(void *opaque)
85 struct bt_host_hci_s *s = (struct bt_host_hci_s *) opaque;
89 /* Seems that we can't read only the header first and then the amount
90 * of data indicated in the header because Linux will discard everything
91 * that's not been read in one go. */
92 s->len = read(s->fd, s->hdr, sizeof(s->hdr));
95 fprintf(stderr, "qemu: error %i reading HCI frame\n", errno);
106 pktlen = MIN(pkt[1] + 2, s->len);
107 s->hci.evt_recv(s->hci.opaque, pkt, pktlen);
111 /* TODO: if this is an Inquiry Result event, it's also
112 * interpreted by Linux kernel before we received it, possibly
113 * we should clean the kernel Inquiry cache through
114 * ioctl(s->fd, HCI_INQUIRY, ...). */
117 case HCI_ACLDATA_PKT:
121 pktlen = MIN(((pkt[3] << 8) | pkt[2]) + 4, s->len);
122 s->hci.acl_recv(s->hci.opaque, pkt, pktlen);
127 case HCI_SCODATA_PKT:
131 pktlen = MIN(pkt[2] + 3, s->len);
137 fprintf(stderr, "qemu: bad HCI packet type %02x\n", pkt[-1]);
141 static int bt_host_bdaddr_set(struct HCIInfo *hci, const uint8_t *bd_addr)
146 struct HCIInfo *bt_host_hci(const char *id)
148 struct bt_host_hci_s *s;
151 int dev_id = hci_devid(id);
152 struct hci_filter flt;
155 fprintf(stderr, "qemu: `%s' not available\n", id);
159 fd = hci_open_dev(dev_id);
161 /* XXX: can we ensure nobody else has the device opened? */
165 fprintf(stderr, "qemu: Can't open `%s': %s (%i)\n",
166 id, strerror(errno), errno);
171 hci_filter_clear(&flt);
172 hci_filter_all_ptypes(&flt);
173 hci_filter_all_events(&flt);
175 if (setsockopt(fd, SOL_HCI, HCI_FILTER, &flt, sizeof(flt)) < 0) {
176 fprintf(stderr, "qemu: Can't set HCI filter on socket (%i)\n", errno);
181 s = qemu_mallocz(sizeof(struct bt_host_hci_s));
183 s->hci.cmd_send = bt_host_cmd;
184 s->hci.sco_send = bt_host_sco;
185 s->hci.acl_send = bt_host_acl;
186 s->hci.bdaddr_set = bt_host_bdaddr_set;
188 qemu_set_fd_handler(s->fd, bt_host_read, NULL, s);
193 struct HCIInfo *bt_host_hci(const char *id)
195 fprintf(stderr, "qemu: bluetooth passthrough not supported (yet)\n");