/* * 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 "qemu-char.h" #include "sysemu.h" #include "net.h" #include "bt-host.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]; int ret; iv[0].iov_base = (void *)&pkt; iv[0].iov_len = 1; iv[1].iov_base = (void *) data; iv[1].iov_len = len; while ((ret = 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 int bt_host_read_poll(void *opaque) { struct bt_host_hci_s *s = (struct bt_host_hci_s *) opaque; return !!s->hci.evt_recv; } 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; 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 (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 = qemu_mallocz(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_handler2(s->fd, bt_host_read_poll, 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