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freeswitch/src/switch_core_media.c

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baseline
2012-12-18 16:50:43 +00:00
/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2005-2012, Anthony Minessale II <anthm@freeswitch.org>
*
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
*
* The Initial Developer of the Original Code is
* Anthony Minessale II <anthm@freeswitch.org>
* Portions created by the Initial Developer are Copyright (C)
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Anthony Minessale II <anthm@freeswitch.org>
*
* switch_core_media.c -- Core Media
*
*/
#include <switch.h>
#include <switch_ssl.h>
#include <switch_stun.h>
#include <switch_nat.h>
#include <switch_version.h>
#include "private/switch_core_pvt.h"
#include <switch_curl.h>
#include <errno.h>
wip
2012-12-20 04:42:03 +00:00
typedef union {
int32_t intval;
uint32_t uintval;
char *charval;
} scm_multi_t;
static scm_type_t typemap[SCM_MAX] = {
/*SCM_INBOUND_CODEC_STRING*/ STYPE_CHARVAL,
/*SCM_OUTBOUND_CODEC_STRING*/ STYPE_CHARVAL,
/*SCM_TEST*/ STYPE_INTVAL
};
convert rtp flags to arrays
2012-12-18 22:06:29 +00:00
typedef enum {
SMH_INIT = (1 << 0),
SMH_READY = (1 << 1)
} smh_flag_t;
baseline
2012-12-18 16:50:43 +00:00
pull srtp negotiation stuff into the core stage 1
2012-12-19 02:35:44 +00:00
typedef struct secure_settings_s {
int crypto_tag;
unsigned char local_raw_key[SWITCH_RTP_MAX_CRYPTO_LEN];
unsigned char remote_raw_key[SWITCH_RTP_MAX_CRYPTO_LEN];
switch_rtp_crypto_key_type_t crypto_send_type;
switch_rtp_crypto_key_type_t crypto_recv_type;
switch_rtp_crypto_key_type_t crypto_type;
char *local_crypto_key;
char *remote_crypto_key;
} switch_secure_settings_t;
typedef struct switch_rtp_engine_s {
switch_secure_settings_t ssec;
wip
2012-12-20 04:42:03 +00:00
switch_rtp_t *rtp_session;//tp
switch_frame_t read_frame;//tp
pull srtp negotiation stuff into the core stage 1
2012-12-19 02:35:44 +00:00
switch_media_type_t type;
} switch_rtp_engine_t;
convert rtp flags to arrays
2012-12-18 22:06:29 +00:00
struct switch_media_handle_s {
switch_core_session_t *session;
wip
2012-12-20 04:42:03 +00:00
switch_channel_t *channel;
convert rtp flags to arrays
2012-12-18 22:06:29 +00:00
switch_core_media_NDLB_t ndlb;
wip
2012-12-20 04:42:03 +00:00
switch_core_media_flag_t media_flags;
convert rtp flags to arrays
2012-12-18 22:06:29 +00:00
smh_flag_t flags;
pull srtp negotiation stuff into the core stage 1
2012-12-19 02:35:44 +00:00
switch_rtp_engine_t engines[SWITCH_MEDIA_TYPE_TOTAL];
wip
2012-12-20 04:42:03 +00:00
scm_multi_t params[SCM_MAX];
char *codec_order[SWITCH_MAX_CODECS];//tp
int codec_order_last;//tp
const switch_codec_implementation_t *codecs[SWITCH_MAX_CODECS];//tp
int num_codecs;//tp
int payload_space;//tp
convert rtp flags to arrays
2012-12-18 22:06:29 +00:00
};
baseline
2012-12-18 16:50:43 +00:00
wip
2012-12-20 04:42:03 +00:00
SWITCH_DECLARE(void) switch_media_set_param(switch_media_handle_t *smh, scm_param_t param, ...)
{
scm_multi_t *val = &smh->params[param];
scm_type_t type = typemap[param];
va_list ap;
va_start(ap, param);
switch(type) {
case STYPE_INTVAL:
val->intval = va_arg(ap, int);
break;
case STYPE_UINTVAL:
val->uintval = va_arg(ap, unsigned int);
break;
case STYPE_CHARVAL:
val->charval = switch_core_session_strdup(smh->session, va_arg(ap, char *));
break;
default:
abort();
}
va_end(ap);
}
SWITCH_DECLARE(void *) switch_media_get_param(switch_media_handle_t *smh, scm_param_t param)
{
scm_multi_t *val = &smh->params[param];
scm_type_t type = typemap[param];
switch(type) {
case STYPE_INTVAL:
return &val->intval;
break;
case STYPE_UINTVAL:
return &val->uintval;
break;
case STYPE_CHARVAL:
return val->charval;
break;
default:
abort();
}
return NULL;
}
#define get_str(_o, _p) _o->params[_p].charval
SWITCH_DECLARE(const char *)switch_core_media_get_codec_string(switch_core_session_t *session)
{
const char *preferred = NULL, *fallback = NULL;
switch_media_handle_t *smh;
if (!(smh = session->media_handle)) {
preferred = "PCMU";
fallback = "PCMU";
} else {
if (!(preferred = switch_channel_get_variable(session->channel, "absolute_codec_string"))) {
preferred = switch_channel_get_variable(session->channel, "codec_string");
}
if (!preferred) {
if (switch_channel_direction(session->channel) == SWITCH_CALL_DIRECTION_OUTBOUND) {
preferred = get_str(smh, SCM_OUTBOUND_CODEC_STRING);
fallback = get_str(smh, SCM_INBOUND_CODEC_STRING);
} else {
preferred = get_str(smh, SCM_INBOUND_CODEC_STRING);
fallback = get_str(smh, SCM_OUTBOUND_CODEC_STRING);
}
}
}
return !zstr(preferred) ? preferred : fallback;
}
baseline
2012-12-18 16:50:43 +00:00
typo
2012-12-19 02:40:00 +00:00
SWITCH_DECLARE(const char *) switch_core_session_local_crypto_key(switch_core_session_t *session, switch_media_type_t type)
pull srtp negotiation stuff into the core stage 1
2012-12-19 02:35:44 +00:00
{
if (!session->media_handle) {
return NULL;
}
return session->media_handle->engines[type].ssec.local_crypto_key;
}
switch_status_t switch_core_media_build_crypto(switch_media_handle_t *smh,
switch_secure_settings_t *ssec,
int index, switch_rtp_crypto_key_type_t type, switch_rtp_crypto_direction_t direction)
{
unsigned char b64_key[512] = "";
const char *type_str;
unsigned char *key;
const char *val;
switch_channel_t *channel;
char *p;
switch_assert(smh);
channel = switch_core_session_get_channel(smh->session);
if (type == AES_CM_128_HMAC_SHA1_80) {
type_str = SWITCH_RTP_CRYPTO_KEY_80;
} else {
type_str = SWITCH_RTP_CRYPTO_KEY_32;
}
if (direction == SWITCH_RTP_CRYPTO_SEND) {
key = ssec->local_raw_key;
} else {
key = ssec->remote_raw_key;
}
switch_rtp_get_random(key, SWITCH_RTP_KEY_LEN);
switch_b64_encode(key, SWITCH_RTP_KEY_LEN, b64_key, sizeof(b64_key));
p = strrchr((char *) b64_key, '=');
while (p && *p && *p == '=') {
*p-- = '\0';
}
ssec->local_crypto_key = switch_core_session_sprintf(smh->session, "%d %s inline:%s", index, type_str, b64_key);
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(smh->session), SWITCH_LOG_DEBUG, "Set Local Key [%s]\n", ssec->local_crypto_key);
if (!(smh->ndlb & SM_NDLB_DISABLE_SRTP_AUTH) &&
!((val = switch_channel_get_variable(channel, "NDLB_support_asterisk_missing_srtp_auth")) && switch_true(val))) {
ssec->crypto_type = type;
} else {
ssec->crypto_type = AES_CM_128_NULL_AUTH;
}
return SWITCH_STATUS_SUCCESS;
}
switch_status_t switch_core_media_add_crypto(switch_secure_settings_t *ssec, const char *key_str, switch_rtp_crypto_direction_t direction)
{
unsigned char key[SWITCH_RTP_MAX_CRYPTO_LEN];
switch_rtp_crypto_key_type_t type;
char *p;
p = strchr(key_str, ' ');
if (p && *p && *(p + 1)) {
p++;
if (!strncasecmp(p, SWITCH_RTP_CRYPTO_KEY_32, strlen(SWITCH_RTP_CRYPTO_KEY_32))) {
type = AES_CM_128_HMAC_SHA1_32;
} else if (!strncasecmp(p, SWITCH_RTP_CRYPTO_KEY_80, strlen(SWITCH_RTP_CRYPTO_KEY_80))) {
type = AES_CM_128_HMAC_SHA1_80;
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Parse Error near [%s]\n", p);
goto bad;
}
p = strchr(p, ' ');
if (p && *p && *(p + 1)) {
p++;
if (strncasecmp(p, "inline:", 7)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Parse Error near [%s]\n", p);
goto bad;
}
p += 7;
switch_b64_decode(p, (char *) key, sizeof(key));
if (direction == SWITCH_RTP_CRYPTO_SEND) {
ssec->crypto_send_type = type;
memcpy(ssec->local_raw_key, key, SWITCH_RTP_KEY_LEN);
} else {
ssec->crypto_recv_type = type;
memcpy(ssec->remote_raw_key, key, SWITCH_RTP_KEY_LEN);
}
return SWITCH_STATUS_SUCCESS;
}
}
bad:
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error!\n");
return SWITCH_STATUS_FALSE;
}
SWITCH_DECLARE(void) switch_core_media_set_rtp_session(switch_core_session_t *session, switch_media_type_t type, switch_rtp_t *rtp_session)
{
switch_rtp_engine_t *engine;
if (!session->media_handle) return;
engine = &session->media_handle->engines[type];
engine->rtp_session = rtp_session;
wip
2012-12-20 04:42:03 +00:00
engine->type = type;
pull srtp negotiation stuff into the core stage 1
2012-12-19 02:35:44 +00:00
}
SWITCH_DECLARE(void) switch_core_session_get_recovery_crypto_key(switch_core_session_t *session, switch_media_type_t type, const char *varname)
{
const char *tmp;
switch_rtp_engine_t *engine;
if (!session->media_handle) return;
engine = &session->media_handle->engines[type];
if ((tmp = switch_channel_get_variable(session->channel, varname))) {
engine->ssec.remote_crypto_key = switch_core_session_strdup(session, tmp);
switch_channel_set_flag(session->channel, CF_CRYPTO_RECOVER);
}
}
SWITCH_DECLARE(void) switch_core_session_apply_crypto(switch_core_session_t *session, switch_media_type_t type, const char *varname)
{
switch_rtp_engine_t *engine;
if (!session->media_handle) return;
engine = &session->media_handle->engines[type];
if (engine->ssec.remote_crypto_key && switch_channel_test_flag(session->channel, CF_SECURE)) {
switch_core_media_add_crypto(&engine->ssec, engine->ssec.remote_crypto_key, SWITCH_RTP_CRYPTO_RECV);
switch_rtp_add_crypto_key(engine->rtp_session, SWITCH_RTP_CRYPTO_SEND, 1,
engine->ssec.crypto_type, engine->ssec.local_raw_key, SWITCH_RTP_KEY_LEN);
switch_rtp_add_crypto_key(engine->rtp_session, SWITCH_RTP_CRYPTO_RECV, engine->ssec.crypto_tag,
engine->ssec.crypto_type, engine->ssec.remote_raw_key, SWITCH_RTP_KEY_LEN);
switch_channel_set_variable(session->channel, varname, "true");
}
}
SWITCH_DECLARE(int) switch_core_session_check_incoming_crypto(switch_core_session_t *session,
const char *varname,
switch_media_type_t type, const char *crypto, int crypto_tag)
{
int got_crypto = 0;
switch_rtp_engine_t *engine;
if (!session->media_handle) return 0;
engine = &session->media_handle->engines[type];
if (engine->ssec.remote_crypto_key && switch_rtp_ready(engine->rtp_session)) {
/* Compare all the key. The tag may remain the same even if key changed */
if (crypto && !strcmp(crypto, engine->ssec.remote_crypto_key)) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Existing key is still valid.\n");
} else {
const char *a = switch_stristr("AES", engine->ssec.remote_crypto_key);
const char *b = switch_stristr("AES", crypto);
/* Change our key every time we can */
if (switch_channel_test_flag(session->channel, CF_CRYPTO_RECOVER)) {
switch_channel_clear_flag(session->channel, CF_CRYPTO_RECOVER);
} else if (switch_stristr(SWITCH_RTP_CRYPTO_KEY_32, crypto)) {
switch_channel_set_variable(session->channel, varname, SWITCH_RTP_CRYPTO_KEY_32);
switch_core_media_build_crypto(session->media_handle, &engine->ssec, crypto_tag, AES_CM_128_HMAC_SHA1_32, SWITCH_RTP_CRYPTO_SEND);
switch_rtp_add_crypto_key(engine->rtp_session, SWITCH_RTP_CRYPTO_SEND, atoi(crypto), engine->ssec.crypto_type,
engine->ssec.local_raw_key, SWITCH_RTP_KEY_LEN);
} else if (switch_stristr(SWITCH_RTP_CRYPTO_KEY_80, crypto)) {
switch_channel_set_variable(session->channel, varname, SWITCH_RTP_CRYPTO_KEY_80);
switch_core_media_build_crypto(session->media_handle, &engine->ssec, crypto_tag, AES_CM_128_HMAC_SHA1_80, SWITCH_RTP_CRYPTO_SEND);
switch_rtp_add_crypto_key(engine->rtp_session, SWITCH_RTP_CRYPTO_SEND, atoi(crypto), engine->ssec.crypto_type,
engine->ssec.local_raw_key, SWITCH_RTP_KEY_LEN);
} else {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Crypto Setup Failed!.\n");
}
if (a && b && !strncasecmp(a, b, 23)) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Change Remote key to [%s]\n", crypto);
engine->ssec.remote_crypto_key = switch_core_session_strdup(session, crypto);
switch_channel_set_variable(session->channel, "srtp_remote_audio_crypto_key", crypto);
engine->ssec.crypto_tag = crypto_tag;
if (switch_rtp_ready(engine->rtp_session) && switch_channel_test_flag(session->channel, CF_SECURE)) {
switch_core_media_add_crypto(&engine->ssec, engine->ssec.remote_crypto_key, SWITCH_RTP_CRYPTO_RECV);
switch_rtp_add_crypto_key(engine->rtp_session, SWITCH_RTP_CRYPTO_RECV, engine->ssec.crypto_tag,
engine->ssec.crypto_type, engine->ssec.remote_raw_key, SWITCH_RTP_KEY_LEN);
}
got_crypto++;
} else {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Ignoring unacceptable key\n");
}
}
} else if (!switch_rtp_ready(engine->rtp_session)) {
engine->ssec.remote_crypto_key = switch_core_session_strdup(session, crypto);
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Set Remote Key [%s]\n", engine->ssec.remote_crypto_key);
switch_channel_set_variable(session->channel, "srtp_remote_audio_crypto_key", crypto);
engine->ssec.crypto_tag = crypto_tag;
got_crypto++;
if (zstr(engine->ssec.local_crypto_key)) {
if (switch_stristr(SWITCH_RTP_CRYPTO_KEY_32, crypto)) {
switch_channel_set_variable(session->channel, varname, SWITCH_RTP_CRYPTO_KEY_32);
switch_core_media_build_crypto(session->media_handle, &engine->ssec, crypto_tag, AES_CM_128_HMAC_SHA1_32, SWITCH_RTP_CRYPTO_SEND);
} else if (switch_stristr(SWITCH_RTP_CRYPTO_KEY_80, crypto)) {
switch_channel_set_variable(session->channel, varname, SWITCH_RTP_CRYPTO_KEY_80);
switch_core_media_build_crypto(session->media_handle, &engine->ssec, crypto_tag, AES_CM_128_HMAC_SHA1_80, SWITCH_RTP_CRYPTO_SEND);
} else {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Crypto Setup Failed!.\n");
}
}
}
return got_crypto;
}
SWITCH_DECLARE(void) switch_core_session_check_outgoing_crypto(switch_core_session_t *session, const char *sec_var)
{
switch_channel_t *channel = switch_core_session_get_channel(session);
const char *var;
if (!switch_core_session_media_handle_ready(session)) return;
if ((var = switch_channel_get_variable(channel, sec_var)) && !zstr(var)) {
if (switch_true(var) || !strcasecmp(var, SWITCH_RTP_CRYPTO_KEY_32)) {
switch_channel_set_flag(channel, CF_SECURE);
switch_core_media_build_crypto(session->media_handle,
&session->media_handle->engines[SWITCH_MEDIA_TYPE_AUDIO].ssec, 1, AES_CM_128_HMAC_SHA1_32, SWITCH_RTP_CRYPTO_SEND);
switch_core_media_build_crypto(session->media_handle,
&session->media_handle->engines[SWITCH_MEDIA_TYPE_VIDEO].ssec, 1, AES_CM_128_HMAC_SHA1_32, SWITCH_RTP_CRYPTO_SEND);
} else if (!strcasecmp(var, SWITCH_RTP_CRYPTO_KEY_80)) {
switch_channel_set_flag(channel, CF_SECURE);
switch_core_media_build_crypto(session->media_handle,
&session->media_handle->engines[SWITCH_MEDIA_TYPE_AUDIO].ssec, 1, AES_CM_128_HMAC_SHA1_80, SWITCH_RTP_CRYPTO_SEND);
switch_core_media_build_crypto(session->media_handle,
&session->media_handle->engines[SWITCH_MEDIA_TYPE_VIDEO].ssec, 1, AES_CM_128_HMAC_SHA1_80, SWITCH_RTP_CRYPTO_SEND);
}
}
}
convert rtp flags to arrays
2012-12-18 22:06:29 +00:00
SWITCH_DECLARE(switch_status_t) switch_media_handle_create(switch_media_handle_t **smhp, switch_core_session_t *session)
{
switch_status_t status = SWITCH_STATUS_FALSE;
switch_media_handle_t *smh = NULL;
*smhp = NULL;
if ((session->media_handle = switch_core_session_alloc(session, (sizeof(*smh))))) {
pull srtp negotiation stuff into the core stage 1
2012-12-19 02:35:44 +00:00
session->media_handle->session = session;
convert rtp flags to arrays
2012-12-18 22:06:29 +00:00
*smhp = session->media_handle;
switch_set_flag(session->media_handle, SMH_INIT);
wip
2012-12-20 04:42:03 +00:00
session->media_handle->engines[SWITCH_MEDIA_TYPE_AUDIO].read_frame.buflen = SWITCH_RTP_MAX_BUF_LEN;
session->media_handle->engines[SWITCH_MEDIA_TYPE_VIDEO].read_frame.buflen = SWITCH_RTP_MAX_BUF_LEN;
convert rtp flags to arrays
2012-12-18 22:06:29 +00:00
status = SWITCH_STATUS_SUCCESS;
}
return status;
}
SWITCH_DECLARE(void) switch_media_handle_set_ndlb(switch_media_handle_t *smh, switch_core_media_NDLB_t flag)
{
switch_assert(smh);
wip
2012-12-20 04:42:03 +00:00
smh->ndlb |= flag;
convert rtp flags to arrays
2012-12-18 22:06:29 +00:00
}
SWITCH_DECLARE(void) switch_media_handle_clear_ndlb(switch_media_handle_t *smh, switch_core_media_NDLB_t flag)
{
switch_assert(smh);
wip
2012-12-20 04:42:03 +00:00
smh->ndlb &= ~flag;
convert rtp flags to arrays
2012-12-18 22:06:29 +00:00
}
SWITCH_DECLARE(int32_t) switch_media_handle_test_ndlb(switch_media_handle_t *smh, switch_core_media_NDLB_t flag)
{
switch_assert(smh);
wip
2012-12-20 04:42:03 +00:00
return (smh->ndlb & flag);
}
SWITCH_DECLARE(void) switch_media_handle_set_media_flag(switch_media_handle_t *smh, switch_core_media_flag_t flag)
{
switch_assert(smh);
smh->media_flags |= flag;
}
SWITCH_DECLARE(void) switch_media_handle_clear_media_flag(switch_media_handle_t *smh, switch_core_media_flag_t flag)
{
switch_assert(smh);
smh->media_flags &= ~flag;
}
SWITCH_DECLARE(int32_t) switch_media_handle_test_media_flag(switch_media_handle_t *smh, switch_core_media_flag_t flag)
{
switch_assert(smh);
return (smh->media_flags & flag);
convert rtp flags to arrays
2012-12-18 22:06:29 +00:00
}
SWITCH_DECLARE(switch_status_t) switch_core_session_media_handle_ready(switch_core_session_t *session)
{
if (session->media_handle && switch_test_flag(session->media_handle, SMH_INIT)) {
return SWITCH_STATUS_SUCCESS;
}
return SWITCH_STATUS_FALSE;
}
SWITCH_DECLARE(switch_media_handle_t *) switch_core_session_get_media_handle(switch_core_session_t *session)
{
if (switch_core_session_media_handle_ready(session)) {
return session->media_handle;
}
return NULL;
}
SWITCH_DECLARE(switch_status_t) switch_core_session_clear_media_handle(switch_core_session_t *session)
{
if (!session->media_handle) {
return SWITCH_STATUS_FALSE;
}
return SWITCH_STATUS_SUCCESS;
}
baseline
2012-12-18 16:50:43 +00:00
wip
2012-12-20 04:42:03 +00:00
#if 0
SWITCH_DECLARE(switch_status_t) switch_core_session_read_media_frame(switch_core_session_t *session, switch_frame_t **frame,
switch_io_flag_t flags, int stream_id, switch_media_type_t type)
{
switch_channel_t *channel;
uint32_t sanity = 1000;
switch_rtcp_frame_t rtcp_frame;
switch_rtp_engine_t *engine;
if (!session->media_handle) return;
engine = &session->media_handle->engines[type];
channel = switch_core_session_get_channel(session);
switch_assert(tech_pvt != NULL);
tech_pvt->read_frame.datalen = 0;
sofia_set_flag_locked(tech_pvt, TFLAG_READING);
if (sofia_test_flag(tech_pvt, TFLAG_HUP) || sofia_test_flag(tech_pvt, TFLAG_BYE) || !tech_pvt->read_codec.implementation ||
!switch_core_codec_ready(&tech_pvt->read_codec)) {
return SWITCH_STATUS_FALSE;
}
if (sofia_test_flag(tech_pvt, TFLAG_IO)) {
switch_status_t status;
if (!sofia_test_flag(tech_pvt, TFLAG_RTP)) {
return SWITCH_STATUS_GENERR;
}
switch_assert(tech_pvt->rtp_session != NULL);
tech_pvt->read_frame.datalen = 0;
if (sofia_test_flag(tech_pvt, TFLAG_SIMPLIFY) && sofia_test_flag(tech_pvt, TFLAG_GOT_ACK)) {
if (sofia_glue_tech_simplify(tech_pvt)) {
sofia_clear_flag(tech_pvt, TFLAG_SIMPLIFY);
}
}
while (sofia_test_flag(tech_pvt, TFLAG_IO) && tech_pvt->read_frame.datalen == 0) {
tech_pvt->read_frame.flags = SFF_NONE;
status = switch_rtp_zerocopy_read_frame(tech_pvt->rtp_session, &tech_pvt->read_frame, flags);
if (status != SWITCH_STATUS_SUCCESS && status != SWITCH_STATUS_BREAK) {
if (status == SWITCH_STATUS_TIMEOUT) {
if (sofia_test_flag(tech_pvt, TFLAG_SIP_HOLD)) {
sofia_glue_toggle_hold(tech_pvt, 0);
sofia_clear_flag_locked(tech_pvt, TFLAG_SIP_HOLD);
switch_channel_clear_flag(channel, CF_LEG_HOLDING);
}
if (switch_channel_get_variable(tech_pvt->channel, "execute_on_media_timeout")) {
*frame = &tech_pvt->read_frame;
switch_set_flag((*frame), SFF_CNG);
(*frame)->datalen = tech_pvt->read_impl.encoded_bytes_per_packet;
memset((*frame)->data, 0, (*frame)->datalen);
switch_channel_execute_on(tech_pvt->channel, "execute_on_media_timeout");
return SWITCH_STATUS_SUCCESS;
}
switch_channel_hangup(tech_pvt->channel, SWITCH_CAUSE_MEDIA_TIMEOUT);
}
return status;
}
/* Try to read an RTCP frame, if successful raise an event */
if (switch_rtcp_zerocopy_read_frame(tech_pvt->rtp_session, &rtcp_frame) == SWITCH_STATUS_SUCCESS) {
switch_event_t *event;
if (switch_event_create(&event, SWITCH_EVENT_RECV_RTCP_MESSAGE) == SWITCH_STATUS_SUCCESS) {
char value[30];
char header[50];
int i;
char *uuid = switch_core_session_get_uuid(session);
if (uuid) {
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Unique-ID", switch_core_session_get_uuid(session));
}
snprintf(value, sizeof(value), "%.8x", rtcp_frame.ssrc);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "SSRC", value);
snprintf(value, sizeof(value), "%u", rtcp_frame.ntp_msw);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "NTP-Most-Significant-Word", value);
snprintf(value, sizeof(value), "%u", rtcp_frame.ntp_lsw);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "NTP-Least-Significant-Word", value);
snprintf(value, sizeof(value), "%u", rtcp_frame.timestamp);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "RTP-Timestamp", value);
snprintf(value, sizeof(value), "%u", rtcp_frame.packet_count);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Sender-Packet-Count", value);
snprintf(value, sizeof(value), "%u", rtcp_frame.octect_count);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Octect-Packet-Count", value);
snprintf(value, sizeof(value), "%" SWITCH_SIZE_T_FMT, tech_pvt->read_frame.timestamp);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Last-RTP-Timestamp", value);
snprintf(value, sizeof(value), "%u", tech_pvt->read_frame.rate);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "RTP-Rate", value);
snprintf(value, sizeof(value), "%" SWITCH_TIME_T_FMT, switch_time_now());
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Capture-Time", value);
// Add sources info
for (i = 0; i < rtcp_frame.report_count; i++) {
snprintf(header, sizeof(header), "Source%u-SSRC", i);
snprintf(value, sizeof(value), "%.8x", rtcp_frame.reports[i].ssrc);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, header, value);
snprintf(header, sizeof(header), "Source%u-Fraction", i);
snprintf(value, sizeof(value), "%u", rtcp_frame.reports[i].fraction);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, header, value);
snprintf(header, sizeof(header), "Source%u-Lost", i);
snprintf(value, sizeof(value), "%u", rtcp_frame.reports[i].lost);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, header, value);
snprintf(header, sizeof(header), "Source%u-Highest-Sequence-Number-Received", i);
snprintf(value, sizeof(value), "%u", rtcp_frame.reports[i].highest_sequence_number_received);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, header, value);
snprintf(header, sizeof(header), "Source%u-Jitter", i);
snprintf(value, sizeof(value), "%u", rtcp_frame.reports[i].jitter);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, header, value);
snprintf(header, sizeof(header), "Source%u-LSR", i);
snprintf(value, sizeof(value), "%u", rtcp_frame.reports[i].lsr);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, header, value);
snprintf(header, sizeof(header), "Source%u-DLSR", i);
snprintf(value, sizeof(value), "%u", rtcp_frame.reports[i].dlsr);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, header, value);
}
switch_event_fire(&event);
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG10, "Dispatched RTCP event\n");
}
}
/* Fast PASS! */
if (switch_test_flag((&tech_pvt->read_frame), SFF_PROXY_PACKET)) {
sofia_clear_flag_locked(tech_pvt, TFLAG_READING);
*frame = &tech_pvt->read_frame;
return SWITCH_STATUS_SUCCESS;
}
if (switch_rtp_has_dtmf(tech_pvt->rtp_session)) {
switch_dtmf_t dtmf = { 0 };
switch_rtp_dequeue_dtmf(tech_pvt->rtp_session, &dtmf);
switch_channel_queue_dtmf(channel, &dtmf);
}
if (tech_pvt->read_frame.datalen > 0) {
uint32_t bytes = 0;
int frames = 1;
if (!switch_test_flag((&tech_pvt->read_frame), SFF_CNG)) {
if (!tech_pvt->read_codec.implementation || !switch_core_codec_ready(&tech_pvt->read_codec)) {
*frame = NULL;
return SWITCH_STATUS_GENERR;
}
if ((tech_pvt->read_frame.datalen % 10) == 0 &&
sofia_test_pflag(tech_pvt->profile, PFLAG_AUTOFIX_TIMING) && tech_pvt->check_frames < MAX_CODEC_CHECK_FRAMES) {
tech_pvt->check_frames++;
if (!tech_pvt->read_impl.encoded_bytes_per_packet) {
tech_pvt->check_frames = MAX_CODEC_CHECK_FRAMES;
goto skip;
}
if (tech_pvt->last_ts && tech_pvt->read_frame.datalen != tech_pvt->read_impl.encoded_bytes_per_packet) {
uint32_t codec_ms = (int) (tech_pvt->read_frame.timestamp -
tech_pvt->last_ts) / (tech_pvt->read_impl.samples_per_second / 1000);
if ((codec_ms % 10) != 0 || codec_ms > tech_pvt->read_impl.samples_per_packet * 10) {
tech_pvt->last_ts = 0;
goto skip;
}
if (tech_pvt->last_codec_ms && tech_pvt->last_codec_ms == codec_ms) {
tech_pvt->mismatch_count++;
}
tech_pvt->last_codec_ms = codec_ms;
if (tech_pvt->mismatch_count > MAX_MISMATCH_FRAMES) {
if (switch_rtp_ready(tech_pvt->rtp_session) && codec_ms != tech_pvt->codec_ms) {
const char *val;
int rtp_timeout_sec = 0;
int rtp_hold_timeout_sec = 0;
if (codec_ms > 120) { /* yeah right */
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING,
"Your phone is trying to send timestamps that suggest an increment of %dms per packet\n"
"That seems hard to believe so I am going to go on ahead and um ignore that, mmkay?\n",
(int) codec_ms);
tech_pvt->check_frames = MAX_CODEC_CHECK_FRAMES;
goto skip;
}
tech_pvt->read_frame.datalen = 0;
if (codec_ms != tech_pvt->codec_ms) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING,
"Asynchronous PTIME not supported, changing our end from %d to %d\n",
(int) tech_pvt->codec_ms,
(int) codec_ms
);
switch_channel_set_variable_printf(channel, "sip_h_X-Broken-PTIME", "Adv=%d;Sent=%d",
(int) tech_pvt->codec_ms, (int) codec_ms);
tech_pvt->codec_ms = codec_ms;
}
if (sofia_glue_tech_set_codec(tech_pvt, 2) != SWITCH_STATUS_SUCCESS) {
*frame = NULL;
return SWITCH_STATUS_GENERR;
}
if ((val = switch_channel_get_variable(tech_pvt->channel, "rtp_timeout_sec"))) {
int v = atoi(val);
if (v >= 0) {
rtp_timeout_sec = v;
}
}
if ((val = switch_channel_get_variable(tech_pvt->channel, "rtp_hold_timeout_sec"))) {
int v = atoi(val);
if (v >= 0) {
rtp_hold_timeout_sec = v;
}
}
if (rtp_timeout_sec) {
tech_pvt->max_missed_packets = (tech_pvt->read_impl.samples_per_second * rtp_timeout_sec) /
tech_pvt->read_impl.samples_per_packet;
switch_rtp_set_max_missed_packets(tech_pvt->rtp_session, tech_pvt->max_missed_packets);
if (!rtp_hold_timeout_sec) {
rtp_hold_timeout_sec = rtp_timeout_sec * 10;
}
}
if (rtp_hold_timeout_sec) {
tech_pvt->max_missed_hold_packets = (tech_pvt->read_impl.samples_per_second * rtp_hold_timeout_sec) /
tech_pvt->read_impl.samples_per_packet;
}
tech_pvt->check_frames = 0;
tech_pvt->last_ts = 0;
/* inform them of the codec they are actually sending */
#if 0
if (++tech_pvt->codec_reinvites > 2) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING,
"Ok, some devices *cough* X-lite *cough*\n"
"seem to continue to lie over and over again so I guess we'll\n"
"leave well-enough alone and let them lie\n");
} else {
sofia_glue_do_invite(session);
}
#endif
*frame = &tech_pvt->read_frame;
switch_set_flag((*frame), SFF_CNG);
(*frame)->datalen = tech_pvt->read_impl.encoded_bytes_per_packet;
memset((*frame)->data, 0, (*frame)->datalen);
return SWITCH_STATUS_SUCCESS;
}
}
} else {
tech_pvt->mismatch_count = 0;
}
tech_pvt->last_ts = tech_pvt->read_frame.timestamp;
} else {
tech_pvt->mismatch_count = 0;
tech_pvt->last_ts = 0;
}
skip:
if ((bytes = tech_pvt->read_impl.encoded_bytes_per_packet)) {
frames = (tech_pvt->read_frame.datalen / bytes);
}
tech_pvt->read_frame.samples = (int) (frames * tech_pvt->read_impl.samples_per_packet);
if (tech_pvt->read_frame.datalen == 0) {
continue;
}
}
break;
}
}
}
sofia_clear_flag_locked(tech_pvt, TFLAG_READING);
if (tech_pvt->read_frame.datalen == 0) {
*frame = NULL;
return SWITCH_STATUS_GENERR;
}
*frame = &tech_pvt->read_frame;
return SWITCH_STATUS_SUCCESS;
}
#endif
SWITCH_DECLARE(void) switch_core_media_prepare_codecs(switch_core_session_t *session, switch_bool_t force)
{
const char *abs, *codec_string = NULL;
const char *ocodec = NULL;
switch_media_handle_t *smh;
if (!(smh = session->media_handle)) {
return;
}
if (switch_channel_test_flag(session->channel, CF_PROXY_MODE) || switch_channel_test_flag(session->channel, CF_PROXY_MEDIA)) {
return;
}
if (force) {
smh->num_codecs = 0;
}
if (smh->num_codecs) {
return;
}
smh->payload_space = 0;
switch_assert(smh->session != NULL);
if ((abs = switch_channel_get_variable(session->channel, "absolute_codec_string"))) {
/* inherit_codec == true will implicitly clear the absolute_codec_string
variable if used since it was the reason it was set in the first place and is no longer needed */
if (switch_true(switch_channel_get_variable(session->channel, "inherit_codec"))) {
switch_channel_set_variable(session->channel, "absolute_codec_string", NULL);
}
codec_string = abs;
goto ready;
}
if (!(codec_string = switch_channel_get_variable(session->channel, "codec_string"))) {
codec_string = switch_core_media_get_codec_string(smh->session);
}
if (codec_string && *codec_string == '=') {
codec_string++;
goto ready;
}
if ((ocodec = switch_channel_get_variable(session->channel, SWITCH_ORIGINATOR_CODEC_VARIABLE))) {
if (!codec_string || (smh->media_flags & SCMF_DISABLE_TRANSCODING)) {
codec_string = ocodec;
} else {
if (!(codec_string = switch_core_session_sprintf(smh->session, "%s,%s", ocodec, codec_string))) {
codec_string = ocodec;
}
}
}
ready:
if (codec_string) {
char *tmp_codec_string = switch_core_session_strdup(smh->session, codec_string);
smh->codec_order_last = switch_separate_string(tmp_codec_string, ',', smh->codec_order, SWITCH_MAX_CODECS);
smh->num_codecs = switch_loadable_module_get_codecs_sorted(smh->codecs, SWITCH_MAX_CODECS, smh->codec_order, smh->codec_order_last);
} else {
smh->num_codecs = switch_loadable_module_get_codecs(smh->codecs, sizeof(smh->codecs) / sizeof(smh->codecs[0]));
}
}
baseline
2012-12-18 16:50:43 +00:00
/* For Emacs:
* Local Variables:
* mode:c
* indent-tabs-mode:t
* tab-width:4
* c-basic-offset:4
* End:
* For VIM:
* vim:set softtabstop=4 shiftwidth=4 tabstop=4:
*/