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asterisk/funcs/func_frame_trace.c

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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2010, Digium, Inc.
*
* David Vossel <dvossel@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Trace internal ast_frames on a channel.
*
* \author David Vossel <dvossel@digium.com>
*
* \ingroup functions
*/
/*** MODULEINFO
<support_level>extended</support_level>
***/
#include "asterisk.h"
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/framehook.h"
/*** DOCUMENTATION
<function name="FRAME_TRACE" language="en_US">
<synopsis>
View internal ast_frames as they are read and written on a channel.
</synopsis>
<syntax>
<parameter name="filter list type" required="true">
<para>A filter can be applied to the trace to limit what frames are viewed. This
filter can either be a <literal>white</literal> or <literal>black</literal> list
of frame types. When no filter type is present, <literal>white</literal> is
used. If no arguments are provided at all, all frames will be output.
</para>
<para>Below are the different types of frames that can be filtered.</para>
<enumlist>
<enum name = "DTMF_BEGIN" />
<enum name = "DTMF_END" />
<enum name = "VOICE" />
<enum name = "VIDEO" />
<enum name = "CONTROL" />
<enum name = "NULL" />
<enum name = "IAX" />
<enum name = "TEXT" />
<enum name = "TEXT_DATA" />
<enum name = "IMAGE" />
<enum name = "HTML" />
<enum name = "CNG" />
<enum name = "MODEM" />
</enumlist>
</parameter>
</syntax>
<description>
<para>Examples:</para>
<example title="View only DTMF frames">
exten => 1,1,Set(FRAME_TRACE(white)=DTMF_BEGIN,DTMF_END)
</example>
<example title="View only DTMF frames">
exten => 1,1,Set(FRAME_TRACE()=DTMF_BEGIN,DTMF_END)
</example>
<example title="View everything except DTMF frames">
exten => 1,1,Set(FRAME_TRACE(black)=DTMF_BEGIN,DTMF_END)
</example>
</description>
</function>
***/
static void print_frame(struct ast_frame *frame);
static struct {
enum ast_frame_type type;
const char *str;
} frametype2str[] = {
{ AST_FRAME_DTMF_BEGIN, "DTMF_BEGIN" },
{ AST_FRAME_DTMF_END, "DTMF_END" },
{ AST_FRAME_VOICE, "VOICE" },
{ AST_FRAME_VIDEO, "VIDEO" },
{ AST_FRAME_CONTROL, "CONTROL" },
{ AST_FRAME_NULL, "NULL" },
{ AST_FRAME_IAX, "IAX" },
{ AST_FRAME_TEXT, "TEXT" },
{ AST_FRAME_TEXT_DATA, "TEXT_DATA" },
{ AST_FRAME_IMAGE, "IMAGE" },
{ AST_FRAME_HTML, "HTML" },
{ AST_FRAME_CNG, "CNG" },
{ AST_FRAME_MODEM, "MODEM" },
};
struct frame_trace_data {
int list_type; /* 0 = white, 1 = black */
int values[ARRAY_LEN(frametype2str)];
};
static void datastore_destroy_cb(void *data) {
ast_free(data);
}
static const struct ast_datastore_info frame_trace_datastore = {
.type = "frametrace",
.destroy = datastore_destroy_cb
};
static void hook_destroy_cb(void *framedata)
{
ast_free(framedata);
}
static struct ast_frame *hook_event_cb(struct ast_channel *chan, struct ast_frame *frame, enum ast_framehook_event event, void *data)
{
int i;
int show_frame = 0;
struct frame_trace_data *framedata = data;
if (!frame) {
return frame;
}
if ((event != AST_FRAMEHOOK_EVENT_WRITE) && (event != AST_FRAMEHOOK_EVENT_READ)) {
return frame;
}
for (i = 0; i < ARRAY_LEN(frametype2str); i++) {
if (frame->frametype == frametype2str[i].type) {
if ((framedata->list_type == 0) && (framedata->values[i])) { /* white list */
show_frame = 1;
} else if ((framedata->list_type == 1) && (!framedata->values[i])){ /* black list */
show_frame = 1;
}
break;
}
}
if (show_frame) {
ast_verbose("%s on Channel %s\n", event == AST_FRAMEHOOK_EVENT_READ ? "<--Read" : "--> Write", ast_channel_name(chan));
print_frame(frame);
}
return frame;
}
static int frame_trace_helper(struct ast_channel *chan, const char *cmd, char *data, const char *value)
{
struct frame_trace_data *framedata;
struct ast_datastore *datastore = NULL;
struct ast_framehook_interface interface = {
.version = AST_FRAMEHOOK_INTERFACE_VERSION,
.event_cb = hook_event_cb,
.destroy_cb = hook_destroy_cb,
};
int i = 0;
if (!chan) {
ast_log(LOG_WARNING, "No channel was provided to %s function.\n", cmd);
return -1;
}
if (!(framedata = ast_calloc(1, sizeof(*framedata)))) {
return 0;
}
interface.data = framedata;
if (!strcasecmp(data, "black")) {
framedata->list_type = 1;
}
for (i = 0; i < ARRAY_LEN(frametype2str); i++) {
if (strcasestr(value, frametype2str[i].str)) {
framedata->values[i] = 1;
}
}
ast_channel_lock(chan);
i = ast_framehook_attach(chan, &interface);
if (i >= 0) {
int *id;
if ((datastore = ast_channel_datastore_find(chan, &frame_trace_datastore, NULL))) {
id = datastore->data;
ast_framehook_detach(chan, *id);
ast_channel_datastore_remove(chan, datastore);
ast_datastore_free(datastore);
}
if (!(datastore = ast_datastore_alloc(&frame_trace_datastore, NULL))) {
ast_framehook_detach(chan, i);
ast_channel_unlock(chan);
return 0;
}
if (!(id = ast_calloc(1, sizeof(int)))) {
ast_datastore_free(datastore);
ast_framehook_detach(chan, i);
ast_channel_unlock(chan);
return 0;
}
*id = i; /* Store off the id. The channel is still locked so it is safe to access this ptr. */
datastore->data = id;
ast_channel_datastore_add(chan, datastore);
}
ast_channel_unlock(chan);
return 0;
}
static void print_frame(struct ast_frame *frame)
{
switch (frame->frametype) {
case AST_FRAME_DTMF_END:
ast_verbose("FrameType: DTMF END\n");
ast_verbose("Digit: 0x%02X '%c'\n", (unsigned)frame->subclass.integer,
frame->subclass.integer < ' ' ? ' ' : frame->subclass.integer);
break;
case AST_FRAME_VOICE:
ast_verbose("FrameType: VOICE\n");
ast_verbose("Codec: %s\n", ast_format_get_name(frame->subclass.format));
ast_verbose("MS: %ld\n", frame->len);
ast_verbose("Samples: %d\n", frame->samples);
ast_verbose("Bytes: %d\n", frame->datalen);
break;
case AST_FRAME_VIDEO:
ast_verbose("FrameType: VIDEO\n");
ast_verbose("Codec: %s\n", ast_format_get_name(frame->subclass.format));
ast_verbose("MS: %ld\n", frame->len);
ast_verbose("Samples: %d\n", frame->samples);
ast_verbose("Bytes: %d\n", frame->datalen);
break;
case AST_FRAME_CONTROL:
ast_verbose("FrameType: CONTROL\n");
switch ((enum ast_control_frame_type) frame->subclass.integer) {
case AST_CONTROL_HANGUP:
ast_verbose("SubClass: HANGUP\n");
break;
case AST_CONTROL_RING:
ast_verbose("SubClass: RING\n");
break;
case AST_CONTROL_RINGING:
ast_verbose("SubClass: RINGING\n");
break;
case AST_CONTROL_ANSWER:
ast_verbose("SubClass: ANSWER\n");
break;
case AST_CONTROL_BUSY:
ast_verbose("SubClass: BUSY\n");
break;
case AST_CONTROL_TAKEOFFHOOK:
ast_verbose("SubClass: TAKEOFFHOOK\n");
break;
case AST_CONTROL_OFFHOOK:
ast_verbose("SubClass: OFFHOOK\n");
break;
case AST_CONTROL_CONGESTION:
ast_verbose("SubClass: CONGESTION\n");
break;
case AST_CONTROL_FLASH:
ast_verbose("SubClass: FLASH\n");
break;
case AST_CONTROL_WINK:
ast_verbose("SubClass: WINK\n");
break;
case AST_CONTROL_OPTION:
ast_verbose("SubClass: OPTION\n");
break;
case AST_CONTROL_RADIO_KEY:
ast_verbose("SubClass: RADIO KEY\n");
break;
case AST_CONTROL_RADIO_UNKEY:
ast_verbose("SubClass: RADIO UNKEY\n");
break;
case AST_CONTROL_PROGRESS:
ast_verbose("SubClass: PROGRESS\n");
break;
case AST_CONTROL_PROCEEDING:
ast_verbose("SubClass: PROCEEDING\n");
break;
case AST_CONTROL_HOLD:
ast_verbose("SubClass: HOLD\n");
break;
case AST_CONTROL_UNHOLD:
ast_verbose("SubClass: UNHOLD\n");
break;
case AST_CONTROL_VIDUPDATE:
ast_verbose("SubClass: VIDUPDATE\n");
break;
case _XXX_AST_CONTROL_T38:
ast_verbose("SubClass: XXX T38\n");
break;
case AST_CONTROL_SRCUPDATE:
ast_verbose("SubClass: SRCUPDATE\n");
break;
case AST_CONTROL_TRANSFER:
ast_verbose("SubClass: TRANSFER\n");
break;
case AST_CONTROL_CONNECTED_LINE:
ast_verbose("SubClass: CONNECTED LINE\n");
break;
case AST_CONTROL_REDIRECTING:
ast_verbose("SubClass: REDIRECTING\n");
break;
case AST_CONTROL_T38_PARAMETERS:
ast_verbose("SubClass: T38 PARAMETERS\n");
break;
case AST_CONTROL_CC:
ast_verbose("SubClass: CC\n");
break;
case AST_CONTROL_SRCCHANGE:
ast_verbose("SubClass: SRCCHANGE\n");
break;
case AST_CONTROL_READ_ACTION:
ast_verbose("SubClass: READ ACTION\n");
break;
case AST_CONTROL_AOC:
ast_verbose("SubClass: AOC\n");
break;
case AST_CONTROL_MCID:
ast_verbose("SubClass: MCID\n");
break;
case AST_CONTROL_INCOMPLETE:
ast_verbose("SubClass: INCOMPLETE\n");
break;
case AST_CONTROL_END_OF_Q:
ast_verbose("SubClass: END_OF_Q\n");
break;
case AST_CONTROL_UPDATE_RTP_PEER:
ast_verbose("SubClass: UPDATE_RTP_PEER\n");
break;
case AST_CONTROL_PVT_CAUSE_CODE:
ast_verbose("SubClass: PVT_CAUSE_CODE\n");
break;
case AST_CONTROL_MASQUERADE_NOTIFY:
ast_verbose("SubClass: MASQUERADE_NOTIFY\n");
break;
case AST_CONTROL_STREAM_TOPOLOGY_REQUEST_CHANGE:
ast_verbose("SubClass: STREAM_TOPOLOGY_REQUEST_CHANGE\n");
break;
case AST_CONTROL_STREAM_TOPOLOGY_CHANGED:
ast_verbose("SubClass: STREAM_TOPOLOGY_CHANGED\n");
break;
case AST_CONTROL_STREAM_TOPOLOGY_SOURCE_CHANGED:
ast_verbose("SubClass: STREAM_TOPOLOGY_SOURCE_CHANGED\n");
break;
case AST_CONTROL_STREAM_STOP:
ast_verbose("SubClass: STREAM_STOP\n");
break;
case AST_CONTROL_STREAM_SUSPEND:
ast_verbose("SubClass: STREAM_SUSPEND\n");
break;
case AST_CONTROL_STREAM_RESTART:
ast_verbose("SubClass: STREAM_RESTART\n");
break;
case AST_CONTROL_STREAM_REVERSE:
ast_verbose("SubClass: STREAM_REVERSE\n");
break;
case AST_CONTROL_STREAM_FORWARD:
ast_verbose("SubClass: STREAM_FORWARD\n");
break;
case AST_CONTROL_RECORD_CANCEL:
ast_verbose("SubClass: RECORD_CANCEL\n");
break;
case AST_CONTROL_RECORD_STOP:
ast_verbose("SubClass: RECORD_STOP\n");
break;
case AST_CONTROL_RECORD_SUSPEND:
ast_verbose("SubClass: RECORD_SUSPEND\n");
break;
case AST_CONTROL_RECORD_MUTE:
ast_verbose("SubClass: RECORD_MUTE\n");
break;
}
if (frame->subclass.integer == -1) {
ast_verbose("SubClass: %d\n", frame->subclass.integer);
}
ast_verbose("Bytes: %d\n", frame->datalen);
break;
case AST_FRAME_RTCP:
ast_verbose("FrameType: RTCP\n");
break;
case AST_FRAME_NULL:
ast_verbose("FrameType: NULL\n");
break;
case AST_FRAME_IAX:
ast_verbose("FrameType: IAX\n");
break;
case AST_FRAME_TEXT:
ast_verbose("FrameType: TXT\n");
break;
case AST_FRAME_TEXT_DATA:
ast_verbose("FrameType: TXT_DATA\n");
break;
case AST_FRAME_IMAGE:
ast_verbose("FrameType: IMAGE\n");
break;
case AST_FRAME_HTML:
ast_verbose("FrameType: HTML\n");
break;
case AST_FRAME_CNG:
ast_verbose("FrameType: CNG\n");
break;
case AST_FRAME_MODEM:
ast_verbose("FrameType: MODEM\n");
break;
case AST_FRAME_DTMF_BEGIN:
ast_verbose("FrameType: DTMF BEGIN\n");
ast_verbose("Digit: 0x%02X '%c'\n", (unsigned)frame->subclass.integer,
frame->subclass.integer < ' ' ? ' ' : frame->subclass.integer);
break;
case AST_FRAME_BRIDGE_ACTION:
ast_verbose("FrameType: Bridge\n");
ast_verbose("SubClass: %d\n", frame->subclass.integer);
break;
case AST_FRAME_BRIDGE_ACTION_SYNC:
ast_verbose("Frametype: Synchronous Bridge\n");
ast_verbose("Subclass: %d\n", frame->subclass.integer);
break;
}
ast_verbose("Src: %s\n", ast_strlen_zero(frame->src) ? "NOT PRESENT" : frame->src);
ast_verbose("\n");
}
static struct ast_custom_function frame_trace_function = {
.name = "FRAME_TRACE",
.write = frame_trace_helper,
};
static int unload_module(void)
{
return ast_custom_function_unregister(&frame_trace_function);
}
static int load_module(void)
{
int res = ast_custom_function_register(&frame_trace_function);
return res ? AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS;
}
AST_MODULE_INFO_STANDARD_EXTENDED(ASTERISK_GPL_KEY, "Frame Trace for internal ast_frame debugging.");
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