Date: Tue, 7 Oct 2008 09:13:13 -0700 From: "Maksim Yevmenkin" <maksim.yevmenkin@gmail.com> To: vova@fbsd.ru Cc: freebsd-bluetooth@freebsd.org Subject: Re: Bluetooth audio (once again) Message-ID: <bb4a86c70810070913g177edac5n14aab1b62cc61f86@mail.gmail.com> In-Reply-To: <1223106788.4832.25.camel@localhost> References: <3a386af20809261420j535680e8pf44453dbf6f84b20@mail.gmail.com> <bb4a86c70809261504v45ffe1a8oaf26670a1032e86c@mail.gmail.com> <1223034512.1842.111.camel@localhost> <bb4a86c70810030945g3d870a1eqacc85233d9698a66@mail.gmail.com> <1223106788.4832.25.camel@localhost>
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[-- Attachment #1 --]
On 10/4/08, Vladimir Grebenschikov <vova@fbsd.ru> wrote:
> В Fri, 03/10/2008 в 09:45 -0700, Maksim Yevmenkin пишет:
>
>
> > > > sco sockets support was also added, however 1) sco sockets hook is
> > > > *not* connected by default and 2) there are some known problems with
> > > > the code. more specifically problems are related to "broken" bluetooth
> > > > devices and the way they report sco buffer size/packet count. i happen
> > > > to have few of those devices. we need to have a way to handle those
> > > > kind of devices nicely.
> > >
> > > I have Platronics P590 headset with advanced audio and Nokia headset. I
> > > may to check them against our bluetooth stack.
>
>
> I bit strange that I can inquiry and l2ping device, but can't list
> services:
>
> # l2ping -a p590
> 0 bytes from p590 seq_no=0 time=1794.348 ms result=0x6
> 0 bytes from p590 seq_no=1 time=2023.401 ms result=0x6
> 0 bytes from p590 seq_no=2 time=1761.475 ms result=0x6
> ^C
> # l2control -a p590 Read_Channel_List
> l2control: Could not bind socket, bdaddr=00:19:7f:1b:de:77: Network is
> down
please read man page for l2control(8) utility. more specifically,
"
The l2control utility connects to the *local* device with the specified
BD_ADDR and attempts to send the specified command.
"
l2control(8) will dump information about open channels as seen by
*local* device. NOT remote. therefor is does not make much sense to
put *remote* bd_addr as parameter. it will never work.
> Should I do "pairing" somehow ?
generally speaking, yes. usually pairing happens when host (i.e. pc)
is trying to connect to the headset's rfcomm channel. in most cases,
the headset will request authentication. however, if it does not, use
hccontrol(8) write_authentication_enable command on host's device to
force authentication (i.e. paring)
> > ok.be warned, you will need to write some code for that. its
> > relatively simple. basically open an rfcomm socket and then open a sco
> > socket. i can provide examples if you want me to.
>
> Please, send me an example if you have.
attached
thanks,
max
[-- Attachment #2 --]
#include <sys/types.h>
#include <sys/bitstring.h>
#include <sys/endian.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <err.h>
#include <fcntl.h>
#include <netdb.h>
#include <netgraph/bluetooth/include/ng_hci.h>
#include <netgraph/bluetooth/include/ng_l2cap.h>
#include <netgraph/bluetooth/include/ng_btsocket.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <bluetooth.h>
static char const * const atcmd[] =
{
"AT+VGS=15\n\r",
"+VGS=15\n\r",
"AT+VGM=15\n\r",
"+VGM=15\n\r",
"\n\rRING\n\r",
};
int
main(int argc, char **argv)
{
int n, channel, fd, s0rfcomm, s0sco;
struct sockaddr_rfcomm rfcaddr;
struct sockaddr_sco scoaddr;
bdaddr_t addr;
fd_set fds;
struct timeval tm;
char buf[1024];
channel = 1;
memcpy(&addr, NG_HCI_BDADDR_ANY, sizeof(addr));
while ((n = getopt(argc, argv, "a:c:")) != -1) {
switch (n) {
case 'a':
if (!bt_aton(optarg, &addr)) {
struct hostent *he = bt_gethostbyname(optarg);
if (he == NULL)
errx(1, "bt_gethostbyname(%s)", optarg);
memcpy(&addr, he->h_addr, sizeof(addr));
}
break;
case 'c':
channel = atoi(optarg);
if (channel <= 0 || channel > 31)
errx(1, "invalid channel %s", optarg);
break;
default:
errx(1, "invalid option %c", n);
/* NOT REACHED */
}
}
if (memcmp(&addr, NG_HCI_BDADDR_ANY, sizeof(addr)) == 0)
errx(1, "invalid bdaddr");
if (channel <= 0 || channel > 31)
errx(1, "invalid channel %d", channel);
fd = open("voice", O_WRONLY|O_CREAT|O_TRUNC, 0644);
if (fd < 0)
err(1, "open(fd)");
s0rfcomm = socket(PF_BLUETOOTH, SOCK_STREAM, BLUETOOTH_PROTO_RFCOMM);
if (s0rfcomm < 0)
err(1, "socket(rfcomm)");
rfcaddr.rfcomm_len = sizeof(rfcaddr);
rfcaddr.rfcomm_family = AF_BLUETOOTH;
memcpy(&rfcaddr.rfcomm_bdaddr, NG_HCI_BDADDR_ANY, sizeof(rfcaddr.rfcomm_bdaddr));
rfcaddr.rfcomm_channel = 0;
if (bind(s0rfcomm, (struct sockaddr*) &rfcaddr, sizeof(rfcaddr)) < 0)
err(1, "bind(rfcomm)");
rfcaddr.rfcomm_len = sizeof(rfcaddr);
rfcaddr.rfcomm_family = AF_BLUETOOTH;
memcpy(&rfcaddr.rfcomm_bdaddr, &addr, sizeof(rfcaddr.rfcomm_bdaddr));
rfcaddr.rfcomm_channel = channel;
if (connect(s0rfcomm, (struct sockaddr *)&rfcaddr, sizeof(rfcaddr)) < 0)
err(1, "connect(rfcomm)");
#if 0
sleep(5);
channel = 0;
while (1) {
FD_ZERO(&fds);
FD_SET(s0rfcomm, &fds);
tm.tv_sec = 5;
tm.tv_usec = 0;
printf("sending: [%s]", atcmd[channel]);
n = write(s0rfcomm, atcmd[channel], strlen(atcmd[channel]));
if (n != strlen(atcmd[channel]))
errx(1, "write(s0rfcomm) = %d", n);
n = select(s0rfcomm + 1, &fds, NULL, NULL, &tm);
if (n < 0)
err(1, "select()");
if (n == 0) {
printf("timeout\n");
if (++ channel >= sizeof(atcmd)/sizeof(atcmd[0]))
channel = 0;
continue;
}
if (FD_ISSET(s0rfcomm, &fds)) {
n = read(s0rfcomm, buf, sizeof(buf));
if (n < 0)
err(1, "read(s0rfcomm)");
if (n == 0)
errx(1, "read(s0rfcomm). eof");
printf("got: %*.*s\n", n, n, buf);
if (strncasecmp(buf, "AT+CKPD=200", 11) == 0) {
printf("sending: OK\n");
n = write(s0rfcomm, "\r\nOK\r\n", 6);
if (n != 6)
errx(1, "write(s0rfcomm) = %d", n);
break;
}
if (++ channel >= sizeof(atcmd)/sizeof(atcmd[0]))
channel = 0;
}
}
#endif
#if 1
s0sco = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BLUETOOTH_PROTO_SCO);
if (s0sco < 0)
err(1, "socket(sco)");
n = sizeof(scoaddr);
if (getsockname(s0rfcomm,(struct sockaddr*)&scoaddr,&n)<0)
err(1, "getsockname(rfcomm)");
printf("src bdaddr: %s\n", bt_ntoa(&scoaddr.sco_bdaddr, NULL));
if (bind(s0sco, (struct sockaddr *) &scoaddr, sizeof(scoaddr)) < 0)
err(1, "bind(sco)");
n = sizeof(scoaddr);
if (getpeername(s0rfcomm,(struct sockaddr*)&scoaddr,&n)<0)
err(1, "getpeername(rfcomm)");
printf("dst bdaddr: %s\n", bt_ntoa(&scoaddr.sco_bdaddr, NULL));
if (connect(s0sco, (struct sockaddr *) &scoaddr, sizeof(scoaddr)) < 0)
err(1, "connect(sco)");
while (1) {
FD_ZERO(&fds);
FD_SET(s0rfcomm, &fds);
FD_SET(s0sco, &fds);
tm.tv_sec = 5;
tm.tv_usec = 0;
n = (s0rfcomm > s0sco)? s0rfcomm + 1 : s0sco + 1;
n = select(n, &fds, NULL, NULL, &tm);
if (n < 0)
err(1, "select()");
if (n == 0) {
printf("timeout\n");
continue;
}
if (FD_ISSET(s0rfcomm, &fds)) {
n = read(s0rfcomm, buf, sizeof(buf));
if (n < 0)
err(1, "read(s0rfcomm)");
if (n == 0)
errx(1, "read(s0rfcomm). eof");
printf("got: %*.*s\n", n, n, buf);
}
if (FD_ISSET(s0sco, &fds)) {
n = read(s0sco, buf, sizeof(buf));
if (n < 0)
err(1, "read(s0sco)");
if (n == 0)
errx(1, "read(s0sco). eof");
write(fd, buf, n);
}
}
close(s0sco);
close(s0rfcomm);
#endif
return (0);
}
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