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Update module-bluetooth-device to the new ipc.

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This commit is contained in:
Luiz Augusto von Dentz 2008-12-17 17:19:22 -03:00
parent 5db081a898
commit 7323e1a0a8
3 changed files with 217 additions and 172 deletions
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52
src/modules/bluetooth/ipc.c
View file

@ -22,22 +22,26 @@
#include "ipc.h"
/* This table contains the string representation for messages */
static const char *strmsg[] = {
"BT_GETCAPABILITIES_REQ",
"BT_GETCAPABILITIES_RSP",
"BT_SETCONFIGURATION_REQ",
"BT_SETCONFIGURATION_RSP",
"BT_STREAMSTART_REQ",
"BT_STREAMSTART_RSP",
"BT_STREAMSTOP_REQ",
"BT_STREAMSTOP_RSP",
"BT_STREAMSUSPEND_IND",
"BT_STREAMRESUME_IND",
"BT_CONTROL_REQ",
"BT_CONTROL_RSP",
"BT_CONTROL_IND",
"BT_STREAMFD_IND",
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
/* This table contains the string representation for messages types */
static const char *strtypes[] = {
"BT_REQUEST",
"BT_RESPONSE",
"BT_INDICATION",
"BT_ERROR",
};
/* This table contains the string representation for messages names */
static const char *strnames[] = {
"BT_GET_CAPABILITIES",
"BT_SET_CONFIGURATION",
"BT_NEW_STREAM",
"BT_START_STREAM",
"BT_STOP_STREAM",
"BT_SUSPEND_STREAM",
"BT_RESUME_STREAM",
"BT_CONTROL",
};
int bt_audio_service_open(void)
@ -88,7 +92,7 @@ int bt_audio_service_get_data_fd(int sk)
msgh.msg_control = &cmsg_b;
msgh.msg_controllen = CMSG_LEN(sizeof(int));
ret = (int) recvmsg(sk, &msgh, 0);
ret = recvmsg(sk, &msgh, 0);
if (ret < 0) {
err = errno;
fprintf(stderr, "%s: Unable to receive fd: %s (%d)\n",
@ -109,10 +113,18 @@ int bt_audio_service_get_data_fd(int sk)
return -1;
}
const char *bt_audio_strmsg(int type)
const char *bt_audio_strtype(uint8_t type)
{
if (type < 0 || (size_t) type > (sizeof(strmsg) / sizeof(strmsg[0])))
if (type >= ARRAY_SIZE(strtypes))
return NULL;
return strmsg[type];
return strtypes[type];
}
const char *bt_audio_strname(uint8_t name)
{
if (name >= ARRAY_SIZE(strnames))
return NULL;
return strnames[name];
}

190
src/modules/bluetooth/ipc.h
View file

@ -23,36 +23,36 @@
/*
Message sequence chart of streaming sequence for A2DP transport
Audio daemon User
on snd_pcm_open
<--BT_GETCAPABILITIES_REQ
Audio daemon User
on snd_pcm_open
<--BT_GET_CAPABILITIES_REQ
BT_GETCAPABILITIES_RSP-->
BT_GET_CAPABILITIES_RSP-->
on snd_pcm_hw_params
<--BT_SETCONFIGURATION_REQ
on snd_pcm_hw_params
<--BT_SETCONFIGURATION_REQ
BT_SETCONFIGURATION_RSP-->
BT_SET_CONFIGURATION_RSP-->
on snd_pcm_prepare
<--BT_STREAMSTART_REQ
on snd_pcm_prepare
<--BT_START_STREAM_REQ
<Moves to streaming state>
BT_STREAMSTART_RSP-->
BT_START_STREAM_RSP-->
BT_STREAMFD_IND -->
BT_NEW_STREAM_IND -->
< streams data >
..........
< streams data >
..........
on snd_pcm_drop/snd_pcm_drain
on snd_pcm_drop/snd_pcm_drain
<--BT_STREAMSTOP_REQ
<--BT_STOP_STREAM_REQ
<Moves to open state>
BT_STREAMSTOP_RSP-->
BT_STOP_STREAM_RSP-->
on IPC close or appl crash
on IPC close or appl crash
<Moves to idle>
*/
@ -71,43 +71,36 @@ extern "C" {
#include <sys/un.h>
#include <errno.h>
#define BT_AUDIO_IPC_PACKET_SIZE 128
#define BT_SUGGESTED_BUFFER_SIZE 128
#define BT_IPC_SOCKET_NAME "\0/org/bluez/audio"
/* Generic message header definition, except for RSP messages */
/* Generic message header definition, except for RESPONSE messages */
typedef struct {
uint8_t msg_type;
uint8_t type;
uint8_t name;
uint16_t length;
} __attribute__ ((packed)) bt_audio_msg_header_t;
/* Generic message header definition, for all RSP messages */
typedef struct {
bt_audio_msg_header_t msg_h;
uint8_t posix_errno;
} __attribute__ ((packed)) bt_audio_rsp_msg_header_t;
bt_audio_msg_header_t h;
uint8_t posix_errno;
} __attribute__ ((packed)) bt_audio_error_t;
/* Messages list */
#define BT_GETCAPABILITIES_REQ 0
#define BT_GETCAPABILITIES_RSP 1
/* Message types */
#define BT_REQUEST 0
#define BT_RESPONSE 1
#define BT_INDICATION 2
#define BT_ERROR 3
#define BT_SETCONFIGURATION_REQ 2
#define BT_SETCONFIGURATION_RSP 3
#define BT_STREAMSTART_REQ 4
#define BT_STREAMSTART_RSP 5
#define BT_STREAMSTOP_REQ 6
#define BT_STREAMSTOP_RSP 7
#define BT_STREAMSUSPEND_IND 8
#define BT_STREAMRESUME_IND 9
#define BT_CONTROL_REQ 10
#define BT_CONTROL_RSP 11
#define BT_CONTROL_IND 12
#define BT_STREAMFD_IND 13
/* BT_GETCAPABILITIES_REQ */
/* Messages names */
#define BT_GET_CAPABILITIES 0
#define BT_SET_CONFIGURATION 1
#define BT_NEW_STREAM 2
#define BT_START_STREAM 3
#define BT_STOP_STREAM 4
#define BT_SUSPEND_STREAM 5
#define BT_RESUME_STREAM 6
#define BT_CONTROL 7
#define BT_CAPABILITIES_TRANSPORT_A2DP 0
#define BT_CAPABILITIES_TRANSPORT_SCO 1
@ -119,19 +112,22 @@ typedef struct {
#define BT_FLAG_AUTOCONNECT 1
struct bt_getcapabilities_req {
struct bt_get_capabilities_req {
bt_audio_msg_header_t h;
char device[18]; /* Address of the remote Device */
uint8_t transport; /* Requested transport */
uint8_t flags; /* Requested flags */
} __attribute__ ((packed));
/* BT_GETCAPABILITIES_RSP */
/**
* SBC Codec parameters as per A2DP profile 1.0 § 4.3
*/
#define BT_A2DP_CODEC_SBC 0x00
#define BT_A2DP_CODEC_MPEG12 0x01
#define BT_A2DP_CODEC_MPEG24 0x02
#define BT_A2DP_CODEC_ATRAC 0x03
#define BT_SBC_SAMPLING_FREQ_16000 (1 << 3)
#define BT_SBC_SAMPLING_FREQ_32000 (1 << 2)
#define BT_SBC_SAMPLING_FREQ_44100 (1 << 1)
@ -164,7 +160,19 @@ struct bt_getcapabilities_req {
#define BT_MPEG_LAYER_2 (1 << 1)
#define BT_MPEG_LAYER_3 1
#define BT_HFP_CODEC_PCM 0x00
#define BT_PCM_FLAG_NREC 1
typedef struct {
uint8_t transport;
uint8_t type;
uint8_t length;
uint8_t data[0];
} __attribute__ ((packed)) codec_capabilities_t;
typedef struct {
codec_capabilities_t capability;
uint8_t channel_mode;
uint8_t frequency;
uint8_t allocation_method;
@ -175,6 +183,7 @@ typedef struct {
} __attribute__ ((packed)) sbc_capabilities_t;
typedef struct {
codec_capabilities_t capability;
uint8_t channel_mode;
uint8_t crc;
uint8_t layer;
@ -183,74 +192,64 @@ typedef struct {
uint16_t bitrate;
} __attribute__ ((packed)) mpeg_capabilities_t;
struct bt_getcapabilities_rsp {
bt_audio_rsp_msg_header_t rsp_h;
uint8_t transport; /* Granted transport */
sbc_capabilities_t sbc_capabilities; /* A2DP only */
mpeg_capabilities_t mpeg_capabilities; /* A2DP only */
uint16_t sampling_rate; /* SCO only */
} __attribute__ ((packed));
typedef struct {
codec_capabilities_t capability;
uint8_t flags;
uint16_t sampling_rate;
} __attribute__ ((packed)) pcm_capabilities_t;
/* BT_SETCONFIGURATION_REQ */
struct bt_setconfiguration_req {
struct bt_get_capabilities_rsp {
bt_audio_msg_header_t h;
char device[18]; /* Address of the remote Device */
uint8_t transport; /* Requested transport */
uint8_t access_mode; /* Requested access mode */
sbc_capabilities_t sbc_capabilities; /* A2DP only - only one of this field
and next one must be filled */
mpeg_capabilities_t mpeg_capabilities; /* A2DP only */
uint8_t data[0]; /* First codec_capabilities_t */
} __attribute__ ((packed));
/* BT_SETCONFIGURATION_RSP */
struct bt_setconfiguration_rsp {
bt_audio_rsp_msg_header_t rsp_h;
uint8_t transport; /* Granted transport */
uint8_t access_mode; /* Granted access mode */
uint16_t link_mtu; /* Max length that transport supports */
struct bt_set_configuration_req {
bt_audio_msg_header_t h;
char device[18]; /* Address of the remote Device */
uint8_t access_mode; /* Requested access mode */
codec_capabilities_t codec; /* Requested codec */
} __attribute__ ((packed));
struct bt_set_configuration_rsp {
bt_audio_msg_header_t h;
uint8_t transport; /* Granted transport */
uint8_t access_mode; /* Granted access mode */
uint16_t link_mtu; /* Max length that transport supports */
} __attribute__ ((packed));
/* BT_STREAMSTART_REQ */
#define BT_STREAM_ACCESS_READ 0
#define BT_STREAM_ACCESS_WRITE 1
#define BT_STREAM_ACCESS_READWRITE 2
struct bt_streamstart_req {
struct bt_start_stream_req {
bt_audio_msg_header_t h;
} __attribute__ ((packed));
/* BT_STREAMSTART_RSP */
struct bt_streamstart_rsp {
bt_audio_rsp_msg_header_t rsp_h;
struct bt_start_stream_rsp {
bt_audio_msg_header_t h;
} __attribute__ ((packed));
/* BT_STREAMFD_IND */
/* This message is followed by one byte of data containing the stream data fd
as ancilliary data */
struct bt_streamfd_ind {
struct bt_new_stream_ind {
bt_audio_msg_header_t h;
} __attribute__ ((packed));
/* BT_STREAMSTOP_REQ */
struct bt_streamstop_req {
struct bt_stop_stream_req {
bt_audio_msg_header_t h;
} __attribute__ ((packed));
/* BT_STREAMSTOP_RSP */
struct bt_streamstop_rsp {
bt_audio_rsp_msg_header_t rsp_h;
} __attribute__ ((packed));
/* BT_STREAMSUSPEND_IND */
struct bt_streamsuspend_ind {
struct bt_stop_stream_rsp {
bt_audio_msg_header_t h;
} __attribute__ ((packed));
/* BT_STREAMRESUME_IND */
struct bt_streamresume_ind {
struct bt_suspend_stream_ind {
bt_audio_msg_header_t h;
} __attribute__ ((packed));
/* BT_CONTROL_REQ */
struct bt_resume_stream_ind {
bt_audio_msg_header_t h;
} __attribute__ ((packed));
#define BT_CONTROL_KEY_POWER 0x40
#define BT_CONTROL_KEY_VOL_UP 0x41
@ -272,14 +271,12 @@ struct bt_control_req {
uint8_t key; /* Control Key */
} __attribute__ ((packed));
/* BT_CONTROL_RSP */
struct bt_control_rsp {
bt_audio_rsp_msg_header_t rsp_h;
uint8_t mode; /* Control Mode */
uint8_t key; /* Control Key */
bt_audio_msg_header_t h;
uint8_t mode; /* Control Mode */
uint8_t key; /* Control Key */
} __attribute__ ((packed));
/* BT_CONTROL_IND */
struct bt_control_ind {
bt_audio_msg_header_t h;
uint8_t mode; /* Control Mode */
@ -299,7 +296,10 @@ BT_STREAMFD_IND message is returned */
int bt_audio_service_get_data_fd(int sk);
/* Human readable message type string */
const char *bt_audio_strmsg(int type);
const char *bt_audio_strtype(uint8_t type);
/* Human readable message name string */
const char *bt_audio_strname(uint8_t name);
#ifdef __cplusplus
}

147
src/modules/bluetooth/module-bluetooth-device.c
View file

@ -122,8 +122,12 @@ static const char* const valid_modargs[] = {
static int bt_audioservice_send(int sk, const bt_audio_msg_header_t *msg) {
int e;
pa_log_debug("sending %s", bt_audio_strmsg(msg->msg_type));
if (send(sk, msg, BT_AUDIO_IPC_PACKET_SIZE, 0) > 0)
const char *type, *name;
type = bt_audio_strtype(msg->type);
name = bt_audio_strname(msg->name);
pa_log_debug("sending: %s -> %s", type, name);
if (send(sk, msg, BT_SUGGESTED_BUFFER_SIZE, 0) > 0)
e = 0;
else {
e = -errno;
@ -132,20 +136,22 @@ static int bt_audioservice_send(int sk, const bt_audio_msg_header_t *msg) {
return e;
}
static int bt_audioservice_recv(int sk, bt_audio_msg_header_t *inmsg) {
static int bt_audioservice_recv(int sk, bt_audio_msg_header_t *inmsg, uint16_t expected_length) {
int e;
const char *type;
const char *type, *name;
pa_log_debug("trying to receive msg from audio service...");
if (recv(sk, inmsg, BT_AUDIO_IPC_PACKET_SIZE, 0) > 0) {
type = bt_audio_strmsg(inmsg->msg_type);
if (type) {
pa_log_debug("Received %s", type);
if (recv(sk, inmsg, expected_length ? : BT_SUGGESTED_BUFFER_SIZE, 0) > 0) {
type = bt_audio_strtype(inmsg->type);
name = bt_audio_strname(inmsg->name);
if (type && name) {
pa_log_debug("Received: %s <- %s", type, name);
e = 0;
}
else {
e = -EINVAL;
pa_log_error("Bogus message type %d received from audio service", inmsg->msg_type);
pa_log_error("Bogus message type %d name %d received from audio service",
inmsg->type, inmsg->name);
}
}
else {
@ -156,29 +162,66 @@ static int bt_audioservice_recv(int sk, bt_audio_msg_header_t *inmsg) {
return e;
}
static int bt_audioservice_expect(int sk, bt_audio_msg_header_t *rsp_hdr, int expected_type) {
int e = bt_audioservice_recv(sk, rsp_hdr);
if (e == 0) {
if (rsp_hdr->msg_type != expected_type) {
static int bt_audioservice_expect(int sk, bt_audio_msg_header_t *rsp, uint8_t expected_name, uint16_t expected_length) {
int e = bt_audioservice_recv(sk, rsp, expected_length);
if (e < 0) {
if (rsp->name != expected_name) {
e = -EINVAL;
pa_log_error("Bogus message %s received while %s was expected", bt_audio_strmsg(rsp_hdr->msg_type),
bt_audio_strmsg(expected_type));
pa_log_error("Bogus message %s received while %s was expected",
bt_audio_strname(rsp->name),
bt_audio_strname(expected_name));
}
}
if (rsp->type == BT_ERROR) {
bt_audio_error_t *error = (void *) rsp;
pa_log_error("%s failed : %s(%d)", bt_audio_strname(rsp->name), pa_cstrerror(error->posix_errno), error->posix_errno);
return -error->posix_errno;
}
return e;
}
static int bt_parsecaps(struct userdata *u, struct bt_get_capabilities_rsp *rsp) {
uint16_t bytes_left = rsp->h.length - sizeof(*rsp);
codec_capabilities_t *codec = (void *) rsp->data;
u->transport = codec->transport;
if (codec->transport != BT_CAPABILITIES_TRANSPORT_A2DP)
return 0;
while (bytes_left > 0) {
if (codec->type == BT_A2DP_CODEC_SBC)
break;
bytes_left -= codec->length;
codec = (void *) (codec + codec->length);
}
if (bytes_left <= 0 || codec->length != sizeof(u->a2dp.sbc_capabilities))
return -EINVAL;
memcpy(&u->a2dp.sbc_capabilities, codec, codec->length);
return 0;
}
static int bt_getcaps(struct userdata *u) {
int e;
union {
bt_audio_rsp_msg_header_t rsp_hdr;
struct bt_getcapabilities_req getcaps_req;
struct bt_getcapabilities_rsp getcaps_rsp;
uint8_t buf[BT_AUDIO_IPC_PACKET_SIZE];
bt_audio_msg_header_t rsp;
struct bt_get_capabilities_req getcaps_req;
struct bt_get_capabilities_rsp getcaps_rsp;
uint8_t buf[BT_SUGGESTED_BUFFER_SIZE];
} msg;
memset(msg.buf, 0, BT_AUDIO_IPC_PACKET_SIZE);
msg.getcaps_req.h.msg_type = BT_GETCAPABILITIES_REQ;
memset(msg.buf, 0, BT_SUGGESTED_BUFFER_SIZE);
msg.getcaps_req.h.type = BT_REQUEST;
msg.getcaps_req.h.name = BT_GET_CAPABILITIES;
msg.getcaps_req.h.length = sizeof(msg.getcaps_req);
strncpy(msg.getcaps_req.device, u->addr, 18);
if (strcasecmp(u->profile, "a2dp") == 0)
msg.getcaps_req.transport = BT_CAPABILITIES_TRANSPORT_A2DP;
@ -196,20 +239,13 @@ static int bt_getcaps(struct userdata *u) {
return e;
}
e = bt_audioservice_expect(u->audioservice_fd, &msg.rsp_hdr.msg_h, BT_GETCAPABILITIES_RSP);
e = bt_audioservice_expect(u->audioservice_fd, &msg.rsp, BT_GET_CAPABILITIES, 0);
if (e < 0) {
pa_log_error("Failed to expect for GETCAPABILITIES_RSP");
return e;
}
if (msg.rsp_hdr.posix_errno != 0) {
pa_log_error("BT_GETCAPABILITIES failed : %s (%d)", pa_cstrerror(msg.rsp_hdr.posix_errno), msg.rsp_hdr.posix_errno);
return -msg.rsp_hdr.posix_errno;
}
if ((u->transport = msg.getcaps_rsp.transport) == BT_CAPABILITIES_TRANSPORT_A2DP)
u->a2dp.sbc_capabilities = msg.getcaps_rsp.sbc_capabilities;
return 0;
return bt_parsecaps(u, &msg.getcaps_rsp);
}
static uint8_t default_bitpool(uint8_t freq, uint8_t mode) {
@ -393,10 +429,10 @@ static void bt_a2dp_setup(struct bt_a2dp *a2dp) {
static int bt_setconf(struct userdata *u) {
int e;
union {
bt_audio_rsp_msg_header_t rsp_hdr;
struct bt_setconfiguration_req setconf_req;
struct bt_setconfiguration_rsp setconf_rsp;
uint8_t buf[BT_AUDIO_IPC_PACKET_SIZE];
bt_audio_msg_header_t rsp;
struct bt_set_configuration_req setconf_req;
struct bt_set_configuration_rsp setconf_rsp;
uint8_t buf[BT_SUGGESTED_BUFFER_SIZE];
} msg;
if (u->transport == BT_CAPABILITIES_TRANSPORT_A2DP) {
@ -410,12 +446,16 @@ static int bt_setconf(struct userdata *u) {
else
u->ss.format = PA_SAMPLE_U8;
memset(msg.buf, 0, BT_AUDIO_IPC_PACKET_SIZE);
msg.setconf_req.h.msg_type = BT_SETCONFIGURATION_REQ;
memset(msg.buf, 0, BT_SUGGESTED_BUFFER_SIZE);
msg.setconf_req.h.type = BT_REQUEST;
msg.setconf_req.h.name = BT_SET_CONFIGURATION;
msg.setconf_req.h.length = sizeof(msg.setconf_req);
strncpy(msg.setconf_req.device, u->addr, 18);
msg.setconf_req.transport = u->transport;
msg.setconf_req.codec.transport = u->transport;
if (u->transport == BT_CAPABILITIES_TRANSPORT_A2DP)
msg.setconf_req.sbc_capabilities = u->a2dp.sbc_capabilities;
memcpy(&msg.setconf_req.codec, &u->a2dp.sbc_capabilities,
sizeof(u->a2dp.sbc_capabilities));
msg.setconf_req.access_mode = BT_CAPABILITIES_ACCESS_MODE_WRITE;
e = bt_audioservice_send(u->audioservice_fd, &msg.setconf_req.h);
@ -424,17 +464,12 @@ static int bt_setconf(struct userdata *u) {
return e;
}
e = bt_audioservice_expect(u->audioservice_fd, &msg.rsp_hdr.msg_h, BT_SETCONFIGURATION_RSP);
e = bt_audioservice_expect(u->audioservice_fd, &msg.rsp, BT_SET_CONFIGURATION, sizeof(msg.setconf_rsp));
if (e < 0) {
pa_log_error("Failed to expect BT_SETCONFIGURATION_RSP");
return e;
}
if (msg.rsp_hdr.posix_errno != 0) {
pa_log_error("BT_SETCONFIGURATION failed : %s(%d)", pa_cstrerror(msg.rsp_hdr.posix_errno), msg.rsp_hdr.posix_errno);
return -msg.rsp_hdr.posix_errno;
}
u->transport = msg.setconf_rsp.transport;
u->strtransport = (u->transport == BT_CAPABILITIES_TRANSPORT_A2DP ? pa_xstrdup("A2DP") : pa_xstrdup("SCO"));
u->link_mtu = msg.setconf_rsp.link_mtu;
@ -456,14 +491,17 @@ static int bt_getstreamfd(struct userdata *u) {
int e;
// uint32_t period_count = io->buffer_size / io->period_size;
union {
bt_audio_rsp_msg_header_t rsp_hdr;
struct bt_streamstart_req start_req;
struct bt_streamfd_ind streamfd_ind;
uint8_t buf[BT_AUDIO_IPC_PACKET_SIZE];
bt_audio_msg_header_t rsp;
struct bt_start_stream_req start_req;
struct bt_start_stream_rsp start_rsp;
struct bt_new_stream_ind streamfd_ind;
uint8_t buf[BT_SUGGESTED_BUFFER_SIZE];
} msg;
memset(msg.buf, 0, BT_AUDIO_IPC_PACKET_SIZE);
msg.start_req.h.msg_type = BT_STREAMSTART_REQ;
memset(msg.buf, 0, BT_SUGGESTED_BUFFER_SIZE);
msg.start_req.h.type = BT_REQUEST;
msg.start_req.h.name = BT_START_STREAM;
msg.start_req.h.length = sizeof(msg.start_req);
e = bt_audioservice_send(u->audioservice_fd, &msg.start_req.h);
if (e < 0) {
@ -471,18 +509,13 @@ static int bt_getstreamfd(struct userdata *u) {
return e;
}
e = bt_audioservice_expect(u->audioservice_fd, &msg.rsp_hdr.msg_h, BT_STREAMSTART_RSP);
e = bt_audioservice_expect(u->audioservice_fd, &msg.rsp, BT_START_STREAM, sizeof(msg.start_rsp));
if (e < 0) {
pa_log_error("Failed to expect BT_STREAMSTART_RSP");
return e;
}
if (msg.rsp_hdr.posix_errno != 0) {
pa_log_error("BT_START failed : %s(%d)", pa_cstrerror(msg.rsp_hdr.posix_errno), msg.rsp_hdr.posix_errno);
return -msg.rsp_hdr.posix_errno;
}
e = bt_audioservice_expect(u->audioservice_fd, &msg.streamfd_ind.h, BT_STREAMFD_IND);
e = bt_audioservice_expect(u->audioservice_fd, &msg.rsp, BT_NEW_STREAM, sizeof(msg.streamfd_ind));
if (e < 0) {
pa_log_error("Failed to expect BT_STREAMFD_IND");
return e;