balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 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 | * |
aurel32 | fad6cb1 | 2009-01-04 22:05:52 +0000 | [diff] [blame] | 16 | * You should have received a copy of the GNU General Public License along |
Blue Swirl | 8167ee8 | 2009-07-16 20:47:01 +0000 | [diff] [blame] | 17 | * with this program; if not, see <http://www.gnu.org/licenses/>. |
balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 18 | */ |
| 19 | |
| 20 | #include "qemu-common.h" |
| 21 | #include "qemu-char.h" |
| 22 | #include "sysemu.h" |
| 23 | #include "net.h" |
aurel32 | 5ef4efa | 2009-03-10 21:43:35 +0000 | [diff] [blame] | 24 | #include "bt-host.h" |
balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 25 | |
balrog | 2e9b08e | 2008-09-30 23:31:35 +0000 | [diff] [blame] | 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 |
balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 38 | |
| 39 | struct bt_host_hci_s { |
| 40 | struct HCIInfo hci; |
| 41 | int fd; |
| 42 | |
| 43 | uint8_t hdr[HCI_MAX_FRAME_SIZE]; |
| 44 | int len; |
| 45 | }; |
| 46 | |
| 47 | static void bt_host_send(struct HCIInfo *hci, |
| 48 | int type, const uint8_t *data, int len) |
| 49 | { |
| 50 | struct bt_host_hci_s *s = (struct bt_host_hci_s *) hci; |
| 51 | uint8_t pkt = type; |
| 52 | struct iovec iv[2]; |
balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 53 | |
blueswir1 | 3f4cb3d | 2009-04-13 16:31:01 +0000 | [diff] [blame] | 54 | iv[0].iov_base = (void *)&pkt; |
balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 55 | iv[0].iov_len = 1; |
| 56 | iv[1].iov_base = (void *) data; |
| 57 | iv[1].iov_len = len; |
| 58 | |
Blue Swirl | 7300c07 | 2010-04-25 18:20:28 +0000 | [diff] [blame] | 59 | while (writev(s->fd, iv, 2) < 0) { |
balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 60 | if (errno != EAGAIN && errno != EINTR) { |
| 61 | fprintf(stderr, "qemu: error %i writing bluetooth packet.\n", |
| 62 | errno); |
| 63 | return; |
| 64 | } |
Blue Swirl | 7300c07 | 2010-04-25 18:20:28 +0000 | [diff] [blame] | 65 | } |
balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 66 | } |
| 67 | |
| 68 | static void bt_host_cmd(struct HCIInfo *hci, const uint8_t *data, int len) |
| 69 | { |
| 70 | bt_host_send(hci, HCI_COMMAND_PKT, data, len); |
| 71 | } |
| 72 | |
| 73 | static void bt_host_acl(struct HCIInfo *hci, const uint8_t *data, int len) |
| 74 | { |
| 75 | bt_host_send(hci, HCI_ACLDATA_PKT, data, len); |
| 76 | } |
| 77 | |
| 78 | static void bt_host_sco(struct HCIInfo *hci, const uint8_t *data, int len) |
| 79 | { |
| 80 | bt_host_send(hci, HCI_SCODATA_PKT, data, len); |
| 81 | } |
| 82 | |
balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 83 | static void bt_host_read(void *opaque) |
| 84 | { |
| 85 | struct bt_host_hci_s *s = (struct bt_host_hci_s *) opaque; |
| 86 | uint8_t *pkt; |
| 87 | int pktlen; |
| 88 | |
| 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)); |
| 93 | |
| 94 | if (s->len < 0) { |
| 95 | fprintf(stderr, "qemu: error %i reading HCI frame\n", errno); |
| 96 | return; |
| 97 | } |
| 98 | |
| 99 | pkt = s->hdr; |
| 100 | while (s->len --) |
| 101 | switch (*pkt ++) { |
| 102 | case HCI_EVENT_PKT: |
| 103 | if (s->len < 2) |
| 104 | goto bad_pkt; |
| 105 | |
| 106 | pktlen = MIN(pkt[1] + 2, s->len); |
| 107 | s->hci.evt_recv(s->hci.opaque, pkt, pktlen); |
| 108 | s->len -= pktlen; |
| 109 | pkt += pktlen; |
| 110 | |
| 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, ...). */ |
| 115 | break; |
| 116 | |
| 117 | case HCI_ACLDATA_PKT: |
| 118 | if (s->len < 4) |
| 119 | goto bad_pkt; |
| 120 | |
| 121 | pktlen = MIN(((pkt[3] << 8) | pkt[2]) + 4, s->len); |
| 122 | s->hci.acl_recv(s->hci.opaque, pkt, pktlen); |
| 123 | s->len -= pktlen; |
| 124 | pkt += pktlen; |
| 125 | break; |
| 126 | |
| 127 | case HCI_SCODATA_PKT: |
| 128 | if (s->len < 3) |
| 129 | goto bad_pkt; |
| 130 | |
| 131 | pktlen = MIN(pkt[2] + 3, s->len); |
| 132 | s->len -= pktlen; |
| 133 | pkt += pktlen; |
| 134 | |
| 135 | default: |
| 136 | bad_pkt: |
| 137 | fprintf(stderr, "qemu: bad HCI packet type %02x\n", pkt[-1]); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | static int bt_host_bdaddr_set(struct HCIInfo *hci, const uint8_t *bd_addr) |
| 142 | { |
| 143 | return -ENOTSUP; |
| 144 | } |
| 145 | |
| 146 | struct HCIInfo *bt_host_hci(const char *id) |
| 147 | { |
| 148 | struct bt_host_hci_s *s; |
| 149 | int fd = -1; |
balrog | 2e9b08e | 2008-09-30 23:31:35 +0000 | [diff] [blame] | 150 | # ifdef CONFIG_BLUEZ |
balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 151 | int dev_id = hci_devid(id); |
| 152 | struct hci_filter flt; |
| 153 | |
| 154 | if (dev_id < 0) { |
| 155 | fprintf(stderr, "qemu: `%s' not available\n", id); |
| 156 | return 0; |
| 157 | } |
| 158 | |
| 159 | fd = hci_open_dev(dev_id); |
| 160 | |
| 161 | /* XXX: can we ensure nobody else has the device opened? */ |
balrog | 2e9b08e | 2008-09-30 23:31:35 +0000 | [diff] [blame] | 162 | # endif |
balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 163 | |
| 164 | if (fd < 0) { |
| 165 | fprintf(stderr, "qemu: Can't open `%s': %s (%i)\n", |
| 166 | id, strerror(errno), errno); |
blueswir1 | 511d2b1 | 2009-03-07 15:32:56 +0000 | [diff] [blame] | 167 | return NULL; |
balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 168 | } |
| 169 | |
balrog | 2e9b08e | 2008-09-30 23:31:35 +0000 | [diff] [blame] | 170 | # ifdef CONFIG_BLUEZ |
balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 171 | hci_filter_clear(&flt); |
| 172 | hci_filter_all_ptypes(&flt); |
| 173 | hci_filter_all_events(&flt); |
| 174 | |
| 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); |
| 177 | return 0; |
| 178 | } |
balrog | 2e9b08e | 2008-09-30 23:31:35 +0000 | [diff] [blame] | 179 | # endif |
balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 180 | |
| 181 | s = qemu_mallocz(sizeof(struct bt_host_hci_s)); |
| 182 | s->fd = fd; |
| 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; |
| 187 | |
Juan Quintela | ca96c31 | 2010-03-11 17:55:40 +0100 | [diff] [blame] | 188 | qemu_set_fd_handler(s->fd, bt_host_read, NULL, s); |
balrog | fb599c9 | 2008-09-28 23:49:55 +0000 | [diff] [blame] | 189 | |
| 190 | return &s->hci; |
| 191 | } |
balrog | 2e9b08e | 2008-09-30 23:31:35 +0000 | [diff] [blame] | 192 | #else |
| 193 | struct HCIInfo *bt_host_hci(const char *id) |
| 194 | { |
aurel32 | 978d5d7 | 2008-11-06 09:38:51 +0000 | [diff] [blame] | 195 | fprintf(stderr, "qemu: bluetooth passthrough not supported (yet)\n"); |
balrog | 2e9b08e | 2008-09-30 23:31:35 +0000 | [diff] [blame] | 196 | |
| 197 | return 0; |
| 198 | } |
| 199 | #endif |