hw/arm/virt-acpi-build: don't save VirtGuestInfo on AcpiBuildState
[qemu.git] / bt-host.c
1 /*
2 * Wrap a host Bluetooth HCI socket in a struct HCIInfo.
3 *
4 * Copyright (C) 2008 Andrzej Zaborowski <balrog@zabor.org>
5 *
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.
10 *
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.
15 *
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/>.
18 */
19
20 #include "qemu/osdep.h"
21 #include "qemu-common.h"
22 #include "sysemu/bt.h"
23 #include "qemu/main-loop.h"
24
25 #ifndef _WIN32
26 # include <sys/ioctl.h>
27 # include <sys/uio.h>
28 # ifdef CONFIG_BLUEZ
29 # include <bluetooth/bluetooth.h>
30 # include <bluetooth/hci.h>
31 # include <bluetooth/hci_lib.h>
32 # else
33 # include "hw/bt.h"
34 # define HCI_MAX_FRAME_SIZE 1028
35 # endif
36
37 struct bt_host_hci_s {
38 struct HCIInfo hci;
39 int fd;
40
41 uint8_t hdr[HCI_MAX_FRAME_SIZE];
42 int len;
43 };
44
45 static void bt_host_send(struct HCIInfo *hci,
46 int type, const uint8_t *data, int len)
47 {
48 struct bt_host_hci_s *s = (struct bt_host_hci_s *) hci;
49 uint8_t pkt = type;
50 struct iovec iv[2];
51
52 iv[0].iov_base = (void *)&pkt;
53 iv[0].iov_len = 1;
54 iv[1].iov_base = (void *) data;
55 iv[1].iov_len = len;
56
57 while (writev(s->fd, iv, 2) < 0) {
58 if (errno != EAGAIN && errno != EINTR) {
59 fprintf(stderr, "qemu: error %i writing bluetooth packet.\n",
60 errno);
61 return;
62 }
63 }
64 }
65
66 static void bt_host_cmd(struct HCIInfo *hci, const uint8_t *data, int len)
67 {
68 bt_host_send(hci, HCI_COMMAND_PKT, data, len);
69 }
70
71 static void bt_host_acl(struct HCIInfo *hci, const uint8_t *data, int len)
72 {
73 bt_host_send(hci, HCI_ACLDATA_PKT, data, len);
74 }
75
76 static void bt_host_sco(struct HCIInfo *hci, const uint8_t *data, int len)
77 {
78 bt_host_send(hci, HCI_SCODATA_PKT, data, len);
79 }
80
81 static void bt_host_read(void *opaque)
82 {
83 struct bt_host_hci_s *s = (struct bt_host_hci_s *) opaque;
84 uint8_t *pkt;
85 int pktlen;
86
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));
91
92 if (s->len < 0) {
93 fprintf(stderr, "qemu: error %i reading HCI frame\n", errno);
94 return;
95 }
96
97 pkt = s->hdr;
98 while (s->len --)
99 switch (*pkt ++) {
100 case HCI_EVENT_PKT:
101 if (s->len < 2)
102 goto bad_pkt;
103
104 pktlen = MIN(pkt[1] + 2, s->len);
105 s->hci.evt_recv(s->hci.opaque, pkt, pktlen);
106 s->len -= pktlen;
107 pkt += pktlen;
108
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, ...). */
113 break;
114
115 case HCI_ACLDATA_PKT:
116 if (s->len < 4)
117 goto bad_pkt;
118
119 pktlen = MIN(((pkt[3] << 8) | pkt[2]) + 4, s->len);
120 s->hci.acl_recv(s->hci.opaque, pkt, pktlen);
121 s->len -= pktlen;
122 pkt += pktlen;
123 break;
124
125 case HCI_SCODATA_PKT:
126 if (s->len < 3)
127 goto bad_pkt;
128
129 pktlen = MIN(pkt[2] + 3, s->len);
130 s->len -= pktlen;
131 pkt += pktlen;
132 break;
133
134 default:
135 bad_pkt:
136 fprintf(stderr, "qemu: bad HCI packet type %02x\n", pkt[-1]);
137 }
138 }
139
140 static int bt_host_bdaddr_set(struct HCIInfo *hci, const uint8_t *bd_addr)
141 {
142 return -ENOTSUP;
143 }
144
145 struct HCIInfo *bt_host_hci(const char *id)
146 {
147 struct bt_host_hci_s *s;
148 int fd = -1;
149 # ifdef CONFIG_BLUEZ
150 int dev_id = hci_devid(id);
151 struct hci_filter flt;
152
153 if (dev_id < 0) {
154 fprintf(stderr, "qemu: `%s' not available\n", id);
155 return 0;
156 }
157
158 fd = hci_open_dev(dev_id);
159
160 /* XXX: can we ensure nobody else has the device opened? */
161 # endif
162
163 if (fd < 0) {
164 fprintf(stderr, "qemu: Can't open `%s': %s (%i)\n",
165 id, strerror(errno), errno);
166 return NULL;
167 }
168
169 # ifdef CONFIG_BLUEZ
170 hci_filter_clear(&flt);
171 hci_filter_all_ptypes(&flt);
172 hci_filter_all_events(&flt);
173
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);
176 return 0;
177 }
178 # endif
179
180 s = g_malloc0(sizeof(struct bt_host_hci_s));
181 s->fd = fd;
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;
186
187 qemu_set_fd_handler(s->fd, bt_host_read, NULL, s);
188
189 return &s->hci;
190 }
191 #else
192 struct HCIInfo *bt_host_hci(const char *id)
193 {
194 fprintf(stderr, "qemu: bluetooth passthrough not supported (yet)\n");
195
196 return 0;
197 }
198 #endif