735 lines
15 KiB
C
735 lines
15 KiB
C
/*
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* hci.c
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*/
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/*-
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* Copyright (c) 2009 Maksim Yevmenkin <m_evmenkin@yahoo.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <assert.h>
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#include <bluetooth.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#undef MIN
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#define MIN(a, b) (((a) < (b))? (a) : (b))
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static int bt_devany_cb(int s, struct bt_devinfo const *di, void *xdevname);
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static char * bt_dev2node (char const *devname, char *nodename, int nnlen);
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int
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bt_devopen(char const *devname)
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{
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struct sockaddr_hci ha;
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bdaddr_t ba;
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int s;
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if (devname == NULL) {
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errno = EINVAL;
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return (-1);
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}
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memset(&ha, 0, sizeof(ha));
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ha.hci_len = sizeof(ha);
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ha.hci_family = AF_BLUETOOTH;
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if (bt_aton(devname, &ba)) {
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if (!bt_devname(ha.hci_node, &ba))
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return (-1);
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} else if (bt_dev2node(devname, ha.hci_node,
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sizeof(ha.hci_node)) == NULL) {
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errno = ENXIO;
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return (-1);
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}
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s = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_HCI);
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if (s < 0)
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return (-1);
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if (bind(s, (struct sockaddr *) &ha, sizeof(ha)) < 0 ||
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connect(s, (struct sockaddr *) &ha, sizeof(ha)) < 0) {
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close(s);
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return (-1);
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}
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return (s);
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}
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int
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bt_devclose(int s)
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{
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return (close(s));
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}
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int
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bt_devsend(int s, uint16_t opcode, void *param, size_t plen)
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{
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ng_hci_cmd_pkt_t h;
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struct iovec iv[2];
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int ivn;
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if ((plen == 0 && param != NULL) ||
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(plen > 0 && param == NULL) ||
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plen > UINT8_MAX) {
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errno = EINVAL;
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return (-1);
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}
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iv[0].iov_base = &h;
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iv[0].iov_len = sizeof(h);
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ivn = 1;
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h.type = NG_HCI_CMD_PKT;
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h.opcode = htole16(opcode);
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if (plen > 0) {
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h.length = plen;
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iv[1].iov_base = param;
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iv[1].iov_len = plen;
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ivn = 2;
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} else
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h.length = 0;
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while (writev(s, iv, ivn) < 0) {
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if (errno == EAGAIN || errno == EINTR)
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continue;
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return (-1);
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}
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return (0);
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}
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ssize_t
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bt_devrecv(int s, void *buf, size_t size, time_t to)
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{
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ssize_t n;
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if (buf == NULL || size == 0) {
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errno = EINVAL;
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return (-1);
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}
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if (to >= 0) {
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fd_set rfd;
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struct timeval tv;
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FD_ZERO(&rfd);
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FD_SET(s, &rfd);
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tv.tv_sec = to;
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tv.tv_usec = 0;
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while ((n = select(s + 1, &rfd, NULL, NULL, &tv)) < 0) {
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if (errno == EAGAIN || errno == EINTR)
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continue;
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return (-1);
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}
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if (n == 0) {
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errno = ETIMEDOUT;
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return (-1);
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}
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assert(FD_ISSET(s, &rfd));
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}
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while ((n = read(s, buf, size)) < 0) {
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if (errno == EAGAIN || errno == EINTR)
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continue;
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return (-1);
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}
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switch (*((uint8_t *) buf)) {
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case NG_HCI_CMD_PKT: {
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ng_hci_cmd_pkt_t *h = (ng_hci_cmd_pkt_t *) buf;
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if (n >= sizeof(*h) && n == (sizeof(*h) + h->length))
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return (n);
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} break;
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case NG_HCI_ACL_DATA_PKT: {
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ng_hci_acldata_pkt_t *h = (ng_hci_acldata_pkt_t *) buf;
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if (n >= sizeof(*h) && n == (sizeof(*h) + le16toh(h->length)))
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return (n);
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} break;
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case NG_HCI_SCO_DATA_PKT: {
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ng_hci_scodata_pkt_t *h = (ng_hci_scodata_pkt_t *) buf;
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if (n >= sizeof(*h) && n == (sizeof(*h) + h->length))
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return (n);
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} break;
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case NG_HCI_EVENT_PKT: {
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ng_hci_event_pkt_t *h = (ng_hci_event_pkt_t *) buf;
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if (n >= sizeof(*h) && n == (sizeof(*h) + h->length))
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return (n);
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} break;
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}
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errno = EIO;
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return (-1);
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}
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int
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bt_devreq(int s, struct bt_devreq *r, time_t to)
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{
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uint8_t buf[320]; /* more than enough */
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ng_hci_event_pkt_t *e = (ng_hci_event_pkt_t *) buf;
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ng_hci_command_compl_ep *cc = (ng_hci_command_compl_ep *)(e+1);
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ng_hci_command_status_ep *cs = (ng_hci_command_status_ep*)(e+1);
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struct bt_devfilter old, new;
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time_t t_end;
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uint16_t opcode;
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ssize_t n;
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int error;
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if (s < 0 || r == NULL || to < 0) {
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errno = EINVAL;
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return (-1);
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}
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if ((r->rlen == 0 && r->rparam != NULL) ||
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(r->rlen > 0 && r->rparam == NULL)) {
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errno = EINVAL;
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return (-1);
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}
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memset(&new, 0, sizeof(new));
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bt_devfilter_pkt_set(&new, NG_HCI_EVENT_PKT);
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bt_devfilter_evt_set(&new, NG_HCI_EVENT_COMMAND_COMPL);
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bt_devfilter_evt_set(&new, NG_HCI_EVENT_COMMAND_STATUS);
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if (r->event != 0)
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bt_devfilter_evt_set(&new, r->event);
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if (bt_devfilter(s, &new, &old) < 0)
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return (-1);
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error = 0;
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n = bt_devsend(s, r->opcode, r->cparam, r->clen);
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if (n < 0) {
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error = errno;
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goto out;
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}
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opcode = htole16(r->opcode);
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t_end = time(NULL) + to;
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do {
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to = t_end - time(NULL);
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if (to < 0)
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to = 0;
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n = bt_devrecv(s, buf, sizeof(buf), to);
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if (n < 0) {
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error = errno;
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goto out;
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}
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if (e->type != NG_HCI_EVENT_PKT) {
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error = EIO;
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goto out;
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}
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n -= sizeof(*e);
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switch (e->event) {
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case NG_HCI_EVENT_COMMAND_COMPL:
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if (cc->opcode == opcode) {
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n -= sizeof(*cc);
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if (r->rlen >= n) {
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r->rlen = n;
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memcpy(r->rparam, cc + 1, r->rlen);
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}
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goto out;
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}
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break;
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case NG_HCI_EVENT_COMMAND_STATUS:
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if (cs->opcode == opcode) {
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if (r->event != NG_HCI_EVENT_COMMAND_STATUS) {
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if (cs->status != 0) {
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error = EIO;
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goto out;
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}
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} else {
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if (r->rlen >= n) {
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r->rlen = n;
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memcpy(r->rparam, cs, r->rlen);
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}
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goto out;
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}
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}
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break;
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default:
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if (e->event == r->event) {
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if (r->rlen >= n) {
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r->rlen = n;
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memcpy(r->rparam, e + 1, r->rlen);
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}
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goto out;
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}
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break;
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}
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} while (to > 0);
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error = ETIMEDOUT;
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out:
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bt_devfilter(s, &old, NULL);
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if (error != 0) {
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errno = error;
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return (-1);
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}
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return (0);
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}
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int
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bt_devfilter(int s, struct bt_devfilter const *new, struct bt_devfilter *old)
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{
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struct ng_btsocket_hci_raw_filter f;
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socklen_t len;
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if (new == NULL && old == NULL) {
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errno = EINVAL;
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return (-1);
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}
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if (old != NULL) {
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len = sizeof(f);
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if (getsockopt(s, SOL_HCI_RAW, SO_HCI_RAW_FILTER, &f, &len) < 0)
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return (-1);
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memset(old, 0, sizeof(*old));
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memcpy(old->packet_mask, &f.packet_mask,
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MIN(sizeof(old->packet_mask), sizeof(f.packet_mask)));
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memcpy(old->event_mask, &f.event_mask,
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MIN(sizeof(old->event_mask), sizeof(f.packet_mask)));
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}
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if (new != NULL) {
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memset(&f, 0, sizeof(f));
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memcpy(&f.packet_mask, new->packet_mask,
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MIN(sizeof(f.packet_mask), sizeof(new->event_mask)));
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memcpy(&f.event_mask, new->event_mask,
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MIN(sizeof(f.event_mask), sizeof(new->event_mask)));
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len = sizeof(f);
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if (setsockopt(s, SOL_HCI_RAW, SO_HCI_RAW_FILTER, &f, len) < 0)
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return (-1);
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}
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return (0);
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}
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void
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bt_devfilter_pkt_set(struct bt_devfilter *filter, uint8_t type)
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{
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bit_set(filter->packet_mask, type - 1);
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}
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void
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bt_devfilter_pkt_clr(struct bt_devfilter *filter, uint8_t type)
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{
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bit_clear(filter->packet_mask, type - 1);
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}
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int
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bt_devfilter_pkt_tst(struct bt_devfilter const *filter, uint8_t type)
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{
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return (bit_test(filter->packet_mask, type - 1));
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}
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void
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bt_devfilter_evt_set(struct bt_devfilter *filter, uint8_t event)
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{
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bit_set(filter->event_mask, event - 1);
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}
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void
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bt_devfilter_evt_clr(struct bt_devfilter *filter, uint8_t event)
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{
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bit_clear(filter->event_mask, event - 1);
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}
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int
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bt_devfilter_evt_tst(struct bt_devfilter const *filter, uint8_t event)
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{
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return (bit_test(filter->event_mask, event - 1));
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}
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int
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bt_devinquiry(char const *devname, time_t length, int num_rsp,
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struct bt_devinquiry **ii)
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{
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uint8_t buf[320];
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char _devname[HCI_DEVNAME_SIZE];
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struct bt_devfilter f;
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ng_hci_inquiry_cp *cp = (ng_hci_inquiry_cp *) buf;
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ng_hci_event_pkt_t *e = (ng_hci_event_pkt_t *) buf;
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ng_hci_inquiry_result_ep *ep = (ng_hci_inquiry_result_ep *)(e+1);
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ng_hci_inquiry_response *ir;
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struct bt_devinquiry *i;
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int s, n;
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if (ii == NULL) {
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errno = EINVAL;
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return (-1);
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}
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if (devname == NULL) {
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memset(_devname, 0, sizeof(_devname));
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devname = _devname;
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n = bt_devenum(bt_devany_cb, _devname);
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if (n <= 0) {
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if (n == 0)
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*ii = NULL;
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return (n);
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}
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}
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s = bt_devopen(devname);
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if (s < 0)
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return (-1);
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if (bt_devfilter(s, NULL, &f) < 0) {
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bt_devclose(s);
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return (-1);
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}
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bt_devfilter_evt_set(&f, NG_HCI_EVENT_INQUIRY_COMPL);
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bt_devfilter_evt_set(&f, NG_HCI_EVENT_INQUIRY_RESULT);
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if (bt_devfilter(s, &f, NULL) < 0) {
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bt_devclose(s);
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return (-1);
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}
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/* Always use GIAC LAP */
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cp->lap[0] = 0x33;
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cp->lap[1] = 0x8b;
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cp->lap[2] = 0x9e;
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/*
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* Calculate inquire length in 1.28 second units
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* v2.x specification says that 1.28 -> 61.44 seconds
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* range is acceptable
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*/
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if (length <= 0)
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length = 5;
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else if (length == 1)
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length = 2;
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else if (length > 62)
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length = 62;
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cp->inquiry_length = (uint8_t)((length * 100) / 128);
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if (num_rsp <= 0 || num_rsp > 255)
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num_rsp = 8;
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cp->num_responses = (uint8_t) num_rsp;
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i = *ii = calloc(num_rsp, sizeof(struct bt_devinquiry));
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if (i == NULL) {
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bt_devclose(s);
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errno = ENOMEM;
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return (-1);
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}
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if (bt_devsend(s,
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NG_HCI_OPCODE(NG_HCI_OGF_LINK_CONTROL, NG_HCI_OCF_INQUIRY),
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cp, sizeof(*cp)) < 0) {
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free(i);
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bt_devclose(s);
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return (-1);
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}
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wait_for_more:
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n = bt_devrecv(s, buf, sizeof(buf), length);
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if (n < 0) {
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free(i);
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bt_devclose(s);
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return (-1);
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}
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if (n < sizeof(ng_hci_event_pkt_t)) {
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free(i);
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bt_devclose(s);
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errno = EIO;
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return (-1);
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}
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switch (e->event) {
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case NG_HCI_EVENT_INQUIRY_COMPL:
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break;
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case NG_HCI_EVENT_INQUIRY_RESULT:
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ir = (ng_hci_inquiry_response *)(ep + 1);
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for (n = 0; n < MIN(ep->num_responses, num_rsp); n ++) {
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bdaddr_copy(&i->bdaddr, &ir->bdaddr);
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i->pscan_rep_mode = ir->page_scan_rep_mode;
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i->pscan_period_mode = ir->page_scan_period_mode;
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memcpy(i->dev_class, ir->uclass, sizeof(i->dev_class));
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i->clock_offset = le16toh(ir->clock_offset);
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ir ++;
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i ++;
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num_rsp --;
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}
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/* FALLTHROUGH */
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default:
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goto wait_for_more;
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/* NOT REACHED */
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}
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bt_devclose(s);
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return (i - *ii);
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}
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int
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bt_devinfo(struct bt_devinfo *di)
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{
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union {
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struct ng_btsocket_hci_raw_node_state r0;
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struct ng_btsocket_hci_raw_node_bdaddr r1;
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struct ng_btsocket_hci_raw_node_features r2;
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struct ng_btsocket_hci_raw_node_buffer r3;
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struct ng_btsocket_hci_raw_node_stat r4;
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struct ng_btsocket_hci_raw_node_link_policy_mask r5;
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struct ng_btsocket_hci_raw_node_packet_mask r6;
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|
struct ng_btsocket_hci_raw_node_role_switch r7;
|
|
struct ng_btsocket_hci_raw_node_debug r8;
|
|
} rp;
|
|
struct sockaddr_hci ha;
|
|
socklen_t halen;
|
|
int s, rval;
|
|
|
|
if (di == NULL) {
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
|
|
s = bt_devopen(di->devname);
|
|
if (s < 0)
|
|
return (-1);
|
|
|
|
rval = -1;
|
|
|
|
halen = sizeof(ha);
|
|
if (getsockname(s, (struct sockaddr *) &ha, &halen) < 0)
|
|
goto bad;
|
|
strlcpy(di->devname, ha.hci_node, sizeof(di->devname));
|
|
|
|
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_STATE, &rp.r0, sizeof(rp.r0)) < 0)
|
|
goto bad;
|
|
di->state = rp.r0.state;
|
|
|
|
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_BDADDR, &rp.r1, sizeof(rp.r1)) < 0)
|
|
goto bad;
|
|
bdaddr_copy(&di->bdaddr, &rp.r1.bdaddr);
|
|
|
|
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_FEATURES, &rp.r2, sizeof(rp.r2)) < 0)
|
|
goto bad;
|
|
memcpy(di->features, rp.r2.features, sizeof(di->features));
|
|
|
|
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_BUFFER, &rp.r3, sizeof(rp.r3)) < 0)
|
|
goto bad;
|
|
di->cmd_free = rp.r3.buffer.cmd_free;
|
|
di->sco_size = rp.r3.buffer.sco_size;
|
|
di->sco_pkts = rp.r3.buffer.sco_pkts;
|
|
di->sco_free = rp.r3.buffer.sco_free;
|
|
di->acl_size = rp.r3.buffer.acl_size;
|
|
di->acl_pkts = rp.r3.buffer.acl_pkts;
|
|
di->acl_free = rp.r3.buffer.acl_free;
|
|
|
|
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_STAT, &rp.r4, sizeof(rp.r4)) < 0)
|
|
goto bad;
|
|
di->cmd_sent = rp.r4.stat.cmd_sent;
|
|
di->evnt_recv = rp.r4.stat.evnt_recv;
|
|
di->acl_recv = rp.r4.stat.acl_recv;
|
|
di->acl_sent = rp.r4.stat.acl_sent;
|
|
di->sco_recv = rp.r4.stat.sco_recv;
|
|
di->sco_sent = rp.r4.stat.sco_sent;
|
|
di->bytes_recv = rp.r4.stat.bytes_recv;
|
|
di->bytes_sent = rp.r4.stat.bytes_sent;
|
|
|
|
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_LINK_POLICY_MASK,
|
|
&rp.r5, sizeof(rp.r5)) < 0)
|
|
goto bad;
|
|
di->link_policy_info = rp.r5.policy_mask;
|
|
|
|
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_PACKET_MASK,
|
|
&rp.r6, sizeof(rp.r6)) < 0)
|
|
goto bad;
|
|
di->packet_type_info = rp.r6.packet_mask;
|
|
|
|
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_ROLE_SWITCH,
|
|
&rp.r7, sizeof(rp.r7)) < 0)
|
|
goto bad;
|
|
di->role_switch_info = rp.r7.role_switch;
|
|
|
|
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_DEBUG, &rp.r8, sizeof(rp.r8)) < 0)
|
|
goto bad;
|
|
di->debug = rp.r8.debug;
|
|
|
|
rval = 0;
|
|
bad:
|
|
bt_devclose(s);
|
|
|
|
return (rval);
|
|
}
|
|
|
|
int
|
|
bt_devenum(bt_devenum_cb_t cb, void *arg)
|
|
{
|
|
struct ng_btsocket_hci_raw_node_list_names rp;
|
|
struct bt_devinfo di;
|
|
struct sockaddr_hci ha;
|
|
int s, i, count;
|
|
|
|
rp.num_names = HCI_DEVMAX;
|
|
rp.names = (struct nodeinfo *) calloc(rp.num_names,
|
|
sizeof(struct nodeinfo));
|
|
if (rp.names == NULL) {
|
|
errno = ENOMEM;
|
|
return (-1);
|
|
}
|
|
|
|
memset(&ha, 0, sizeof(ha));
|
|
ha.hci_len = sizeof(ha);
|
|
ha.hci_family = AF_BLUETOOTH;
|
|
ha.hci_node[0] = 'x';
|
|
|
|
s = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_HCI);
|
|
if (s < 0) {
|
|
free(rp.names);
|
|
|
|
return (-1);
|
|
}
|
|
|
|
if (bind(s, (struct sockaddr *) &ha, sizeof(ha)) < 0 ||
|
|
connect(s, (struct sockaddr *) &ha, sizeof(ha)) < 0 ||
|
|
ioctl(s, SIOC_HCI_RAW_NODE_LIST_NAMES, &rp, sizeof(rp)) < 0) {
|
|
close(s);
|
|
free(rp.names);
|
|
|
|
return (-1);
|
|
}
|
|
|
|
for (count = 0, i = 0; i < rp.num_names; i ++) {
|
|
strlcpy(di.devname, rp.names[i].name, sizeof(di.devname));
|
|
if (bt_devinfo(&di) < 0)
|
|
continue;
|
|
|
|
count ++;
|
|
|
|
if (cb == NULL)
|
|
continue;
|
|
|
|
strlcpy(ha.hci_node, rp.names[i].name, sizeof(ha.hci_node));
|
|
if (bind(s, (struct sockaddr *) &ha, sizeof(ha)) < 0 ||
|
|
connect(s, (struct sockaddr *) &ha, sizeof(ha)) < 0)
|
|
continue;
|
|
|
|
if ((*cb)(s, &di, arg) > 0)
|
|
break;
|
|
}
|
|
|
|
close (s);
|
|
free(rp.names);
|
|
|
|
return (count);
|
|
}
|
|
|
|
static int
|
|
bt_devany_cb(int s, struct bt_devinfo const *di, void *xdevname)
|
|
{
|
|
strlcpy((char *) xdevname, di->devname, HCI_DEVNAME_SIZE);
|
|
return (1);
|
|
}
|
|
|
|
static char *
|
|
bt_dev2node(char const *devname, char *nodename, int nnlen)
|
|
{
|
|
static char const * bt_dev_prefix[] = {
|
|
"btccc", /* 3Com Bluetooth PC-CARD */
|
|
"h4", /* UART/serial Bluetooth devices */
|
|
"ubt", /* Bluetooth USB devices */
|
|
NULL /* should be last */
|
|
};
|
|
|
|
static char _nodename[HCI_DEVNAME_SIZE];
|
|
char const **p;
|
|
char *ep;
|
|
int plen, unit;
|
|
|
|
if (nodename == NULL) {
|
|
nodename = _nodename;
|
|
nnlen = HCI_DEVNAME_SIZE;
|
|
}
|
|
|
|
for (p = bt_dev_prefix; *p != NULL; p ++) {
|
|
plen = strlen(*p);
|
|
if (strncmp(devname, *p, plen) != 0)
|
|
continue;
|
|
|
|
unit = strtoul(devname + plen, &ep, 10);
|
|
if (*ep != '\0' &&
|
|
strcmp(ep, "hci") != 0 &&
|
|
strcmp(ep, "l2cap") != 0)
|
|
return (NULL); /* can't make sense of device name */
|
|
|
|
snprintf(nodename, nnlen, "%s%uhci", *p, unit);
|
|
|
|
return (nodename);
|
|
}
|
|
|
|
return (NULL);
|
|
}
|
|
|