freebsd-dev/usr.sbin/bluetooth/hccontrol/send_recv.c
2004-04-09 23:58:53 +00:00

185 lines
4.4 KiB
C

/*
* send_recv.c
*
* Copyright (c) 2001-2002 Maksim Yevmenkin <m_evmenkin@yahoo.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: send_recv.c,v 1.2 2003/05/21 22:40:30 max Exp $
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/endian.h>
#include <assert.h>
#include <errno.h>
#include <netgraph/bluetooth/include/ng_hci.h>
#include <string.h>
#include <unistd.h>
#include "hccontrol.h"
/* Send HCI request to the unit */
int
hci_request(int s, int opcode, char const *cp, int cp_size, char *rp, int *rp_size)
{
char buffer[512];
int n;
ng_hci_cmd_pkt_t *c = (ng_hci_cmd_pkt_t *) buffer;
ng_hci_event_pkt_t *e = (ng_hci_event_pkt_t *) buffer;
assert(rp != NULL);
assert(rp_size != NULL);
assert(*rp_size > 0);
c->type = NG_HCI_CMD_PKT;
c->opcode = (uint16_t) opcode;
c->opcode = htole16(c->opcode);
if (cp != NULL) {
assert(0 < cp_size && cp_size <= NG_HCI_CMD_PKT_SIZE);
c->length = (uint8_t) cp_size;
memcpy(buffer + sizeof(*c), cp, cp_size);
} else
c->length = 0;
if (hci_send(s, buffer, sizeof(*c) + cp_size) == ERROR)
return (ERROR);
again:
n = sizeof(buffer);
if (hci_recv(s, buffer, &n) == ERROR)
return (ERROR);
if (n < sizeof(*e)) {
errno = EMSGSIZE;
return (ERROR);
}
if (e->type != NG_HCI_EVENT_PKT) {
errno = EIO;
return (ERROR);
}
switch (e->event) {
case NG_HCI_EVENT_COMMAND_COMPL: {
ng_hci_command_compl_ep *cc =
(ng_hci_command_compl_ep *)(e + 1);
cc->opcode = le16toh(cc->opcode);
if (cc->opcode == 0x0000 || cc->opcode != opcode)
goto again;
n -= (sizeof(*e) + sizeof(*cc));
if (n < *rp_size)
*rp_size = n;
memcpy(rp, buffer + sizeof(*e) + sizeof(*cc), *rp_size);
} break;
case NG_HCI_EVENT_COMMAND_STATUS: {
ng_hci_command_status_ep *cs =
(ng_hci_command_status_ep *)(e + 1);
cs->opcode = le16toh(cs->opcode);
if (cs->opcode == 0x0000 || cs->opcode != opcode)
goto again;
*rp_size = 1;
*rp = cs->status;
} break;
default:
goto again;
}
return (OK);
} /* hci_request */
/* Send simple HCI request - Just HCI command packet (no parameters) */
int
hci_simple_request(int s, int opcode, char *rp, int *rp_size)
{
return (hci_request(s, opcode, NULL, 0, rp, rp_size));
} /* hci_simple_request */
/* Send HCI data to the unit */
int
hci_send(int s, char const *buffer, int size)
{
assert(buffer != NULL);
assert(size >= sizeof(ng_hci_cmd_pkt_t));
assert(size <= sizeof(ng_hci_cmd_pkt_t) + NG_HCI_CMD_PKT_SIZE);
if (send(s, buffer, size, 0) < 0)
return (ERROR);
return (OK);
} /* hci_send */
/* Receive HCI data from the unit */
int
hci_recv(int s, char *buffer, int *size)
{
struct timeval tv;
fd_set rfd;
int n;
assert(buffer != NULL);
assert(size != NULL);
assert(*size > sizeof(ng_hci_event_pkt_t));
again:
FD_ZERO(&rfd);
FD_SET(s, &rfd);
tv.tv_sec = timeout;
tv.tv_usec = 0;
n = select(s + 1, &rfd, NULL, NULL, &tv);
if (n <= 0) {
if (n < 0) {
if (errno == EINTR)
goto again;
} else
errno = ETIMEDOUT;
return (ERROR);
}
assert(FD_ISSET(s, &rfd));
n = recv(s, buffer, *size, 0);
if (n < 0)
return (ERROR);
*size = n;
return (OK);
} /* hci_recv */