--- /dev/null
+/*
+ * Wrap a host Bluetooth HCI socket in a struct HCIInfo.
+ *
+ * Copyright (C) 2008 Andrzej Zaborowski <balrog@zabor.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 or
+ * (at your option) version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu-common.h"
+#include "sysemu/bt.h"
+#include "qemu/main-loop.h"
+
+#ifndef _WIN32
+# include <errno.h>
+# include <sys/ioctl.h>
+# include <sys/uio.h>
+# ifdef CONFIG_BLUEZ
+# include <bluetooth/bluetooth.h>
+# include <bluetooth/hci.h>
+# include <bluetooth/hci_lib.h>
+# else
+# include "hw/bt.h"
+# define HCI_MAX_FRAME_SIZE 1028
+# endif
+
+struct bt_host_hci_s {
+ struct HCIInfo hci;
+ int fd;
+
+ uint8_t hdr[HCI_MAX_FRAME_SIZE];
+ int len;
+};
+
+static void bt_host_send(struct HCIInfo *hci,
+ int type, const uint8_t *data, int len)
+{
+ struct bt_host_hci_s *s = (struct bt_host_hci_s *) hci;
+ uint8_t pkt = type;
+ struct iovec iv[2];
+
+ iv[0].iov_base = (void *)&pkt;
+ iv[0].iov_len = 1;
+ iv[1].iov_base = (void *) data;
+ iv[1].iov_len = len;
+
+ while (writev(s->fd, iv, 2) < 0) {
+ if (errno != EAGAIN && errno != EINTR) {
+ fprintf(stderr, "qemu: error %i writing bluetooth packet.\n",
+ errno);
+ return;
+ }
+ }
+}
+
+static void bt_host_cmd(struct HCIInfo *hci, const uint8_t *data, int len)
+{
+ bt_host_send(hci, HCI_COMMAND_PKT, data, len);
+}
+
+static void bt_host_acl(struct HCIInfo *hci, const uint8_t *data, int len)
+{
+ bt_host_send(hci, HCI_ACLDATA_PKT, data, len);
+}
+
+static void bt_host_sco(struct HCIInfo *hci, const uint8_t *data, int len)
+{
+ bt_host_send(hci, HCI_SCODATA_PKT, data, len);
+}
+
+static void bt_host_read(void *opaque)
+{
+ struct bt_host_hci_s *s = (struct bt_host_hci_s *) opaque;
+ uint8_t *pkt;
+ int pktlen;
+
+ /* Seems that we can't read only the header first and then the amount
+ * of data indicated in the header because Linux will discard everything
+ * that's not been read in one go. */
+ s->len = read(s->fd, s->hdr, sizeof(s->hdr));
+
+ if (s->len < 0) {
+ fprintf(stderr, "qemu: error %i reading HCI frame\n", errno);
+ return;
+ }
+
+ pkt = s->hdr;
+ while (s->len --)
+ switch (*pkt ++) {
+ case HCI_EVENT_PKT:
+ if (s->len < 2)
+ goto bad_pkt;
+
+ pktlen = MIN(pkt[1] + 2, s->len);
+ s->hci.evt_recv(s->hci.opaque, pkt, pktlen);
+ s->len -= pktlen;
+ pkt += pktlen;
+
+ /* TODO: if this is an Inquiry Result event, it's also
+ * interpreted by Linux kernel before we received it, possibly
+ * we should clean the kernel Inquiry cache through
+ * ioctl(s->fd, HCI_INQUIRY, ...). */
+ break;
+
+ case HCI_ACLDATA_PKT:
+ if (s->len < 4)
+ goto bad_pkt;
+
+ pktlen = MIN(((pkt[3] << 8) | pkt[2]) + 4, s->len);
+ s->hci.acl_recv(s->hci.opaque, pkt, pktlen);
+ s->len -= pktlen;
+ pkt += pktlen;
+ break;
+
+ case HCI_SCODATA_PKT:
+ if (s->len < 3)
+ goto bad_pkt;
+
+ pktlen = MIN(pkt[2] + 3, s->len);
+ s->len -= pktlen;
+ pkt += pktlen;
+ break;
+
+ default:
+ bad_pkt:
+ fprintf(stderr, "qemu: bad HCI packet type %02x\n", pkt[-1]);
+ }
+}
+
+static int bt_host_bdaddr_set(struct HCIInfo *hci, const uint8_t *bd_addr)
+{
+ return -ENOTSUP;
+}
+
+struct HCIInfo *bt_host_hci(const char *id)
+{
+ struct bt_host_hci_s *s;
+ int fd = -1;
+# ifdef CONFIG_BLUEZ
+ int dev_id = hci_devid(id);
+ struct hci_filter flt;
+
+ if (dev_id < 0) {
+ fprintf(stderr, "qemu: `%s' not available\n", id);
+ return 0;
+ }
+
+ fd = hci_open_dev(dev_id);
+
+ /* XXX: can we ensure nobody else has the device opened? */
+# endif
+
+ if (fd < 0) {
+ fprintf(stderr, "qemu: Can't open `%s': %s (%i)\n",
+ id, strerror(errno), errno);
+ return NULL;
+ }
+
+# ifdef CONFIG_BLUEZ
+ hci_filter_clear(&flt);
+ hci_filter_all_ptypes(&flt);
+ hci_filter_all_events(&flt);
+
+ if (qemu_setsockopt(fd, SOL_HCI, HCI_FILTER, &flt, sizeof(flt)) < 0) {
+ fprintf(stderr, "qemu: Can't set HCI filter on socket (%i)\n", errno);
+ return 0;
+ }
+# endif
+
+ s = g_malloc0(sizeof(struct bt_host_hci_s));
+ s->fd = fd;
+ s->hci.cmd_send = bt_host_cmd;
+ s->hci.sco_send = bt_host_sco;
+ s->hci.acl_send = bt_host_acl;
+ s->hci.bdaddr_set = bt_host_bdaddr_set;
+
+ qemu_set_fd_handler(s->fd, bt_host_read, NULL, s);
+
+ return &s->hci;
+}
+#else
+struct HCIInfo *bt_host_hci(const char *id)
+{
+ fprintf(stderr, "qemu: bluetooth passthrough not supported (yet)\n");
+
+ return 0;
+}
+#endif
Code Review / kvmfornfv.git / blobdiff