Disable preadv/pwritev support
[qemu-kvm/fedora.git] / bt-host.c
blob964ac1163c2c16651e19191871a2efaabe1b0b45
1 /*
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"
22 #include "sysemu.h"
23 #include "net.h"
24 #include "bt-host.h"
26 #ifndef _WIN32
27 # include <errno.h>
28 # include <sys/ioctl.h>
29 # include <sys/uio.h>
30 # ifdef CONFIG_BLUEZ
31 # include <bluetooth/bluetooth.h>
32 # include <bluetooth/hci.h>
33 # include <bluetooth/hci_lib.h>
34 # else
35 # include "hw/bt.h"
36 # define HCI_MAX_FRAME_SIZE 1028
37 # endif
39 struct bt_host_hci_s {
40 struct HCIInfo hci;
41 int fd;
43 uint8_t hdr[HCI_MAX_FRAME_SIZE];
44 int len;
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;
51 uint8_t pkt = type;
52 struct iovec iv[2];
53 int ret;
55 iv[0].iov_base = (void *)&pkt;
56 iv[0].iov_len = 1;
57 iv[1].iov_base = (void *) data;
58 iv[1].iov_len = len;
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",
63 errno);
64 return;
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;
93 uint8_t *pkt;
94 int pktlen;
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));
101 if (s->len < 0) {
102 fprintf(stderr, "qemu: error %i reading HCI frame\n", errno);
103 return;
106 pkt = s->hdr;
107 while (s->len --)
108 switch (*pkt ++) {
109 case HCI_EVENT_PKT:
110 if (s->len < 2)
111 goto bad_pkt;
113 pktlen = MIN(pkt[1] + 2, s->len);
114 s->hci.evt_recv(s->hci.opaque, pkt, pktlen);
115 s->len -= pktlen;
116 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, ...). */
122 break;
124 case HCI_ACLDATA_PKT:
125 if (s->len < 4)
126 goto bad_pkt;
128 pktlen = MIN(((pkt[3] << 8) | pkt[2]) + 4, s->len);
129 s->hci.acl_recv(s->hci.opaque, pkt, pktlen);
130 s->len -= pktlen;
131 pkt += pktlen;
132 break;
134 case HCI_SCODATA_PKT:
135 if (s->len < 3)
136 goto bad_pkt;
138 pktlen = MIN(pkt[2] + 3, s->len);
139 s->len -= pktlen;
140 pkt += pktlen;
142 default:
143 bad_pkt:
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)
150 return -ENOTSUP;
153 struct HCIInfo *bt_host_hci(const char *id)
155 struct bt_host_hci_s *s;
156 int fd = -1;
157 # ifdef CONFIG_BLUEZ
158 int dev_id = hci_devid(id);
159 struct hci_filter flt;
161 if (dev_id < 0) {
162 fprintf(stderr, "qemu: `%s' not available\n", id);
163 return 0;
166 fd = hci_open_dev(dev_id);
168 /* XXX: can we ensure nobody else has the device opened? */
169 # endif
171 if (fd < 0) {
172 fprintf(stderr, "qemu: Can't open `%s': %s (%i)\n",
173 id, strerror(errno), errno);
174 return NULL;
177 # ifdef CONFIG_BLUEZ
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);
184 return 0;
186 # endif
188 s = qemu_mallocz(sizeof(struct bt_host_hci_s));
189 s->fd = fd;
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, NULL, s);
197 return &s->hci;
199 #else
200 struct HCIInfo *bt_host_hci(const char *id)
202 fprintf(stderr, "qemu: bluetooth passthrough not supported (yet)\n");
204 return 0;
206 #endif