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switch_core_media.c
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switch_core_media.c
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/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2005-2021, 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>
* Seven Du <dujinfang@gmail.com>
*
* switch_core_media.c -- Core Media
*
*/
#include <switch.h>
#include <switch_ssl.h>
#include <switch_stun.h>
#include <switch_nat.h>
#include "private/switch_core_pvt.h"
#include <switch_curl.h>
#include <errno.h>
#include <sofia-sip/sdp.h>
#include <sofia-sip/su.h>
static switch_t38_options_t * switch_core_media_process_udptl(switch_core_session_t *session, sdp_session_t *sdp, sdp_media_t *m);
static void switch_core_media_find_zrtp_hash(switch_core_session_t *session, sdp_session_t *sdp);
static void switch_core_media_set_r_sdp_codec_string(switch_core_session_t *session, const char *codec_string, sdp_session_t *sdp, switch_sdp_type_t sdp_type);
static void gen_ice(switch_core_session_t *session, switch_media_type_t type, const char *ip, switch_port_t port);
//#define GOOGLE_ICE
#define RTCP_MUX
#define MAX_CODEC_CHECK_FRAMES 50//x:mod_sofia.h
#define MAX_MISMATCH_FRAMES 5//x:mod_sofia.h
#define type2str(type) type == SWITCH_MEDIA_TYPE_VIDEO ? "video" : (type == SWITCH_MEDIA_TYPE_AUDIO ? "audio" : "text")
#define VIDEO_REFRESH_FREQ 1000000
#define TEXT_TIMER_MS 100
#define TEXT_TIMER_SAMPLES 10
#define TEXT_PERIOD_TIMEOUT 3000
#define MAX_RED_FRAMES 25
#define RED_PACKET_SIZE 100
typedef enum {
SMF_INIT = (1 << 0),
SMF_READY = (1 << 1),
SMF_JB_PAUSED = (1 << 2),
SMF_VB_PAUSED = (1 << 3)
} smh_flag_t;
typedef struct core_video_globals_s {
int cpu_count;
int cur_cpu;
switch_memory_pool_t *pool;
switch_mutex_t *mutex;
uint32_t fps;
uint32_t synced;
} core_video_globals_t;
static core_video_globals_t video_globals = { 0 };
struct media_helper {
switch_core_session_t *session;
switch_thread_cond_t *cond;
switch_mutex_t *cond_mutex;
switch_mutex_t *file_read_mutex;
switch_mutex_t *file_write_mutex;
int up;
int ready;
};
typedef enum {
CRYPTO_MODE_OPTIONAL,
CRYPTO_MODE_MANDATORY,
CRYPTO_MODE_FORBIDDEN
} switch_rtp_crypto_mode_t;
struct switch_rtp_text_factory_s {
switch_memory_pool_t *pool;
switch_frame_t text_frame;
int red_level;
switch_byte_t *text_write_frame_data;
switch_frame_t text_write_frame;
switch_buffer_t *write_buffer;
int write_empty;
switch_byte_t *red_buf[MAX_RED_FRAMES];
int red_bufsize;
int red_buflen[MAX_RED_FRAMES];
uint32_t red_ts[MAX_RED_FRAMES];
int red_pos;
int red_max;
switch_timer_t timer;
};
typedef struct switch_rtp_engine_s {
switch_secure_settings_t ssec[CRYPTO_INVALID+1];
switch_rtp_crypto_key_type_t crypto_type;
switch_media_type_t type;
switch_rtp_t *rtp_session;
switch_frame_t read_frame;
switch_codec_t read_codec;
switch_codec_t write_codec;
switch_codec_implementation_t read_impl;
switch_codec_implementation_t write_impl;
switch_size_t last_ts;
switch_size_t last_seq;
uint32_t check_frames;
uint32_t mismatch_count;
uint32_t last_codec_ms;
uint8_t codec_reinvites;
uint32_t max_missed_packets;
uint32_t max_missed_hold_packets;
uint32_t media_timeout;
uint32_t media_hold_timeout;
uint32_t ssrc;
uint32_t remote_ssrc;
switch_port_t remote_rtcp_port;
switch_rtp_bug_flag_t rtp_bugs;
char *local_sdp_ip;
switch_port_t local_sdp_port;
char *adv_sdp_ip;
switch_port_t adv_sdp_port;
char *proxy_sdp_ip;
switch_port_t proxy_sdp_port;
/** ZRTP **/
char *local_sdp_zrtp_hash;
char *remote_sdp_zrtp_hash;
payload_map_t *cur_payload_map;
payload_map_t *payload_map;
payload_map_t *pmap_tail;
uint32_t timestamp_send;
char *cand_acl[SWITCH_MAX_CAND_ACL];
int cand_acl_count;
ice_t ice_in;
ice_t ice_out;
int8_t rtcp_mux;
dtls_fingerprint_t local_dtls_fingerprint;
dtls_fingerprint_t remote_dtls_fingerprint;
char *remote_rtp_ice_addr;
switch_port_t remote_rtp_ice_port;
char *remote_rtcp_ice_addr;
switch_port_t remote_rtcp_ice_port;
struct media_helper mh;
switch_thread_t *media_thread;
uint8_t reset_codec;
uint8_t codec_negotiated;
uint8_t fir;
uint8_t pli;
uint8_t nack;
uint8_t tmmbr;
uint8_t no_crypto;
uint8_t dtls_controller;
uint8_t pass_codecs;
switch_codec_settings_t codec_settings;
switch_media_flow_t rmode;
switch_media_flow_t smode;
switch_thread_id_t thread_id;
switch_thread_id_t thread_write_lock;
uint8_t new_ice;
uint8_t new_dtls;
uint32_t sdp_bw;
uint32_t orig_bitrate;
float bw_mult;
uint8_t reject_avp;
int t140_pt;
int red_pt;
switch_rtp_text_factory_t *tf;
switch_engine_function_t engine_function;
void *engine_user_data;
int8_t engine_function_running;
switch_frame_buffer_t *write_fb;
} switch_rtp_engine_t;
#define MAX_REJ_STREAMS 10
struct switch_media_handle_s {
switch_core_session_t *session;
switch_channel_t *channel;
switch_core_media_flag_t media_flags[SCMF_MAX];
smh_flag_t flags;
switch_rtp_engine_t engines[SWITCH_MEDIA_TYPE_TOTAL];
switch_msrp_session_t *msrp_session;
switch_mutex_t *read_mutex[SWITCH_MEDIA_TYPE_TOTAL];
switch_mutex_t *write_mutex[SWITCH_MEDIA_TYPE_TOTAL];
char *codec_order[SWITCH_MAX_CODECS];
int codec_order_last;
const switch_codec_implementation_t *codecs[SWITCH_MAX_CODECS];
char fmtp[SWITCH_MAX_CODECS][MAX_FMTP_LEN];
int payload_space;
char *origin;
sdp_media_e rejected_streams[MAX_REJ_STREAMS];
int rej_idx;
switch_mutex_t *mutex;
switch_mutex_t *sdp_mutex;
switch_mutex_t *control_mutex;
const switch_codec_implementation_t *negotiated_codecs[SWITCH_MAX_CODECS];
int num_negotiated_codecs;
switch_payload_t ianacodes[SWITCH_MAX_CODECS];
switch_payload_t dtmf_ianacodes[SWITCH_MAX_CODECS];
switch_payload_t cng_ianacodes[SWITCH_MAX_CODECS];
char *fmtps[SWITCH_MAX_CODECS];
int video_count;
int rates[SWITCH_MAX_CODECS];
uint32_t num_rates;
uint32_t owner_id;
uint32_t session_id;
switch_core_media_params_t *mparams;
char *msid;
char *cname;
switch_rtp_crypto_mode_t crypto_mode;
switch_rtp_crypto_key_type_t crypto_suite_order[CRYPTO_INVALID+1];
switch_time_t video_last_key_time;
switch_time_t video_init;
switch_time_t last_codec_refresh;
switch_time_t last_video_refresh_req;
switch_timer_t video_timer;
switch_vid_params_t vid_params;
switch_file_handle_t *video_read_fh;
switch_file_handle_t *video_write_fh;
uint64_t vid_frames;
time_t vid_started;
int ready_loops;
switch_thread_t *video_write_thread;
int video_write_thread_running;
switch_time_t last_text_frame;
};
switch_srtp_crypto_suite_t SUITES[CRYPTO_INVALID] = {
{ "AEAD_AES_256_GCM_8", "", AEAD_AES_256_GCM_8, 44, 12},
{ "AEAD_AES_256_GCM", "", AEAD_AES_256_GCM, 44, 12},
{ "AEAD_AES_128_GCM_8", "", AEAD_AES_128_GCM_8, 28, 12},
{ "AEAD_AES_128_GCM", "", AEAD_AES_128_GCM, 28, 12},
{ "AES_256_CM_HMAC_SHA1_80", "AES_CM_256_HMAC_SHA1_80", AES_CM_256_HMAC_SHA1_80, 46, 14},
{ "AES_192_CM_HMAC_SHA1_80", "AES_CM_192_HMAC_SHA1_80", AES_CM_192_HMAC_SHA1_80, 38, 14},
{ "AES_CM_128_HMAC_SHA1_80", "", AES_CM_128_HMAC_SHA1_80, 30, 14},
{ "AES_256_CM_HMAC_SHA1_32", "AES_CM_256_HMAC_SHA1_32", AES_CM_256_HMAC_SHA1_32, 46, 14},
{ "AES_192_CM_HMAC_SHA1_32", "AES_CM_192_HMAC_SHA1_32", AES_CM_192_HMAC_SHA1_32, 38, 14},
{ "AES_CM_128_HMAC_SHA1_32", "", AES_CM_128_HMAC_SHA1_32, 30, 14},
{ "AES_CM_128_NULL_AUTH", "", AES_CM_128_NULL_AUTH, 30, 14}
};
static switch_bool_t ice_resolve_candidate = 0;
SWITCH_DECLARE(void) switch_core_media_set_resolveice(switch_bool_t resolve_ice)
{
ice_resolve_candidate = resolve_ice;
}
SWITCH_DECLARE(switch_bool_t) switch_core_media_has_resolveice(void)
{
return ice_resolve_candidate;
}
SWITCH_DECLARE(switch_rtp_crypto_key_type_t) switch_core_media_crypto_str2type(const char *str)
{
int i;
for (i = 0; i < CRYPTO_INVALID; i++) {
if (!strncasecmp(str, SUITES[i].name, strlen(SUITES[i].name)) || (SUITES[i].alias && strlen(SUITES[i].alias) && !strncasecmp(str, SUITES[i].alias, strlen(SUITES[i].alias)))) {
return SUITES[i].type;
}
}
return CRYPTO_INVALID;
}
SWITCH_DECLARE(const char *) switch_core_media_crypto_type2str(switch_rtp_crypto_key_type_t type)
{
switch_assert(type < CRYPTO_INVALID);
return SUITES[type].name;
}
SWITCH_DECLARE(int) switch_core_media_crypto_keysalt_len(switch_rtp_crypto_key_type_t type)
{
switch_assert(type < CRYPTO_INVALID);
return SUITES[type].keysalt_len;
}
SWITCH_DECLARE(int) switch_core_media_crypto_salt_len(switch_rtp_crypto_key_type_t type)
{
switch_assert(type < CRYPTO_INVALID);
return SUITES[type].salt_len;
}
static const char* CRYPTO_KEY_PARAM_METHOD[CRYPTO_KEY_PARAM_METHOD_INVALID] = {
[CRYPTO_KEY_PARAM_METHOD_INLINE] = "inline",
};
static inline switch_media_flow_t sdp_media_flow(unsigned in)
{
switch(in) {
case sdp_sendonly:
return SWITCH_MEDIA_FLOW_SENDONLY;
case sdp_recvonly:
return SWITCH_MEDIA_FLOW_RECVONLY;
case sdp_sendrecv:
return SWITCH_MEDIA_FLOW_SENDRECV;
case sdp_inactive:
return SWITCH_MEDIA_FLOW_INACTIVE;
}
return SWITCH_MEDIA_FLOW_SENDRECV;
}
static int get_channels(const char *name, int dft)
{
if (!zstr(name) && !switch_true(switch_core_get_variable("NDLB_broken_opus_sdp")) && !strcasecmp(name, "opus")) {
return 2; /* IKR???*/
}
return dft ? dft : 1;
}
static void _switch_core_media_pass_zrtp_hash2(switch_core_session_t *aleg_session, switch_core_session_t *bleg_session, switch_media_type_t type)
{
switch_rtp_engine_t *aleg_engine;
switch_rtp_engine_t *bleg_engine;
if (!aleg_session->media_handle || !bleg_session->media_handle) return;
aleg_engine = &aleg_session->media_handle->engines[type];
bleg_engine = &bleg_session->media_handle->engines[type];
switch_log_printf(SWITCH_CHANNEL_CHANNEL_LOG(aleg_session->channel), SWITCH_LOG_DEBUG1,
"Deciding whether to pass zrtp-hash between a-leg and b-leg\n");
if (!(switch_channel_test_flag(aleg_session->channel, CF_ZRTP_PASSTHRU_REQ))) {
switch_log_printf(SWITCH_CHANNEL_CHANNEL_LOG(aleg_session->channel), SWITCH_LOG_DEBUG1,
"CF_ZRTP_PASSTHRU_REQ not set on a-leg, so not propagating zrtp-hash\n");
return;
}
if (aleg_engine->remote_sdp_zrtp_hash) {
switch_log_printf(SWITCH_CHANNEL_CHANNEL_LOG(aleg_session->channel), SWITCH_LOG_DEBUG, "Passing a-leg remote zrtp-hash (audio) to b-leg\n");
bleg_engine->local_sdp_zrtp_hash = switch_core_session_strdup(bleg_session, aleg_engine->remote_sdp_zrtp_hash);
switch_channel_set_variable(bleg_session->channel, "l_sdp_audio_zrtp_hash", bleg_engine->local_sdp_zrtp_hash);
}
if (bleg_engine->remote_sdp_zrtp_hash) {
switch_log_printf(SWITCH_CHANNEL_CHANNEL_LOG(aleg_session->channel), SWITCH_LOG_DEBUG, "Passing b-leg remote zrtp-hash (audio) to a-leg\n");
aleg_engine->local_sdp_zrtp_hash = switch_core_session_strdup(aleg_session, bleg_engine->remote_sdp_zrtp_hash);
switch_channel_set_variable(aleg_session->channel, "l_sdp_audio_zrtp_hash", aleg_engine->local_sdp_zrtp_hash);
}
}
SWITCH_DECLARE(uint32_t) switch_core_media_get_video_fps(switch_core_session_t *session)
{
switch_media_handle_t *smh;
time_t now;
uint32_t fps, elapsed = 0;
switch_assert(session);
if (!(smh = session->media_handle)) {
return SWITCH_STATUS_FALSE;
}
if (!switch_channel_test_flag(session->channel, CF_VIDEO)) {
return 0;
}
now = switch_epoch_time_now(NULL);
elapsed = now - smh->vid_started;
if (!(smh->vid_started && smh->vid_frames && elapsed > 0)) {
return 0;
}
fps = switch_round_to_step(smh->vid_frames / (elapsed), 5);
if (smh->vid_frames > 1000) {
smh->vid_started = switch_epoch_time_now(NULL);
smh->vid_frames = 1;
}
if (fps > 0) {
video_globals.fps = fps;
if (smh->vid_params.fps != fps) {
switch_channel_set_variable_printf(session->channel, "video_fps", "%d", fps);
smh->vid_params.fps = fps;
}
}
return fps;
}
SWITCH_DECLARE(void) switch_core_media_pass_zrtp_hash2(switch_core_session_t *aleg_session, switch_core_session_t *bleg_session)
{
_switch_core_media_pass_zrtp_hash2(aleg_session, bleg_session, SWITCH_MEDIA_TYPE_AUDIO);
_switch_core_media_pass_zrtp_hash2(aleg_session, bleg_session, SWITCH_MEDIA_TYPE_VIDEO);
_switch_core_media_pass_zrtp_hash2(aleg_session, bleg_session, SWITCH_MEDIA_TYPE_TEXT);
}
SWITCH_DECLARE(void) switch_core_media_pass_zrtp_hash(switch_core_session_t *session)
{
switch_channel_t *channel = switch_core_session_get_channel(session);
switch_core_session_t *other_session;
switch_log_printf(SWITCH_CHANNEL_CHANNEL_LOG(channel), SWITCH_LOG_DEBUG1, "Deciding whether to pass zrtp-hash between legs\n");
if (!(switch_channel_test_flag(channel, CF_ZRTP_PASSTHRU_REQ))) {
switch_log_printf(SWITCH_CHANNEL_CHANNEL_LOG(channel), SWITCH_LOG_DEBUG1, "CF_ZRTP_PASSTHRU_REQ not set, so not propagating zrtp-hash\n");
return;
} else if (!(switch_core_session_get_partner(session, &other_session) == SWITCH_STATUS_SUCCESS)) {
switch_log_printf(SWITCH_CHANNEL_CHANNEL_LOG(channel), SWITCH_LOG_DEBUG1, "No partner channel found, so not propagating zrtp-hash\n");
return;
} else {
switch_log_printf(SWITCH_CHANNEL_CHANNEL_LOG(channel), SWITCH_LOG_DEBUG1, "Found peer channel; propagating zrtp-hash if set\n");
switch_core_media_pass_zrtp_hash2(session, other_session);
switch_core_session_rwunlock(other_session);
}
}
SWITCH_DECLARE(const char *) switch_core_media_get_zrtp_hash(switch_core_session_t *session, switch_media_type_t type, switch_bool_t local)
{
switch_rtp_engine_t *engine;
if (!session->media_handle) return NULL;
engine = &session->media_handle->engines[type];
if (local) {
return engine->local_sdp_zrtp_hash;
}
return engine->remote_sdp_zrtp_hash;
}
static void switch_core_media_find_zrtp_hash(switch_core_session_t *session, sdp_session_t *sdp)
{
switch_channel_t *channel = switch_core_session_get_channel(session);
switch_rtp_engine_t *audio_engine;
switch_rtp_engine_t *video_engine;
switch_rtp_engine_t *text_engine;
sdp_media_t *m;
sdp_attribute_t *attr;
int got_audio = 0, got_video = 0, got_text = 0;
if (!session->media_handle) return;
audio_engine = &session->media_handle->engines[SWITCH_MEDIA_TYPE_AUDIO];
video_engine = &session->media_handle->engines[SWITCH_MEDIA_TYPE_VIDEO];
text_engine = &session->media_handle->engines[SWITCH_MEDIA_TYPE_TEXT];
switch_log_printf(SWITCH_CHANNEL_CHANNEL_LOG(channel), SWITCH_LOG_DEBUG1, "Looking for zrtp-hash\n");
for (m = sdp->sdp_media; m; m = m->m_next) {
if (got_audio && got_video && got_text) break;
if (m->m_port && ((m->m_type == sdp_media_audio && !got_audio)
|| (m->m_type == sdp_media_video && !got_video))) {
for (attr = m->m_attributes; attr; attr = attr->a_next) {
if (zstr(attr->a_name)) continue;
if (strcasecmp(attr->a_name, "zrtp-hash") || !(attr->a_value)) continue;
if (m->m_type == sdp_media_audio) {
switch_log_printf(SWITCH_CHANNEL_CHANNEL_LOG(channel), SWITCH_LOG_DEBUG,
"Found audio zrtp-hash; setting r_sdp_audio_zrtp_hash=%s\n", attr->a_value);
switch_channel_set_variable(channel, "r_sdp_audio_zrtp_hash", attr->a_value);
audio_engine->remote_sdp_zrtp_hash = switch_core_session_strdup(session, attr->a_value);
got_audio++;
} else if (m->m_type == sdp_media_video) {
switch_log_printf(SWITCH_CHANNEL_CHANNEL_LOG(channel), SWITCH_LOG_DEBUG,
"Found video zrtp-hash; setting r_sdp_video_zrtp_hash=%s\n", attr->a_value);
switch_channel_set_variable(channel, "r_sdp_video_zrtp_hash", attr->a_value);
video_engine->remote_sdp_zrtp_hash = switch_core_session_strdup(session, attr->a_value);
got_video++;
} else if (m->m_type == sdp_media_text) {
switch_log_printf(SWITCH_CHANNEL_CHANNEL_LOG(channel), SWITCH_LOG_DEBUG,
"Found text zrtp-hash; setting r_sdp_video_zrtp_hash=%s\n", attr->a_value);
switch_channel_set_variable(channel, "r_sdp_text_zrtp_hash", attr->a_value);
text_engine->remote_sdp_zrtp_hash = switch_core_session_strdup(session, attr->a_value);
got_text++;
}
switch_channel_set_flag(channel, CF_ZRTP_HASH);
break;
}
}
}
}
static switch_t38_options_t * switch_core_media_process_udptl(switch_core_session_t *session, sdp_session_t *sdp, sdp_media_t *m)
{
switch_t38_options_t *t38_options = switch_channel_get_private(session->channel, "t38_options");
sdp_attribute_t *attr;
switch_assert(sdp);
if (!t38_options) {
t38_options = switch_core_session_alloc(session, sizeof(switch_t38_options_t));
// set some default value
t38_options->T38FaxVersion = 0;
t38_options->T38MaxBitRate = 14400;
t38_options->T38FaxRateManagement = switch_core_session_strdup(session, "transferredTCF");
t38_options->T38FaxUdpEC = switch_core_session_strdup(session, "t38UDPRedundancy");
t38_options->T38FaxMaxBuffer = 500;
t38_options->T38FaxMaxDatagram = 500;
}
t38_options->remote_port = (switch_port_t)m->m_port;
if (sdp->sdp_origin) {
t38_options->sdp_o_line = switch_core_session_strdup(session, sdp->sdp_origin->o_username);
} else {
t38_options->sdp_o_line = "unknown";
}
if (m->m_connections && m->m_connections->c_address) {
t38_options->remote_ip = switch_core_session_strdup(session, m->m_connections->c_address);
} else if (sdp->sdp_connection && sdp->sdp_connection->c_address) {
t38_options->remote_ip = switch_core_session_strdup(session, sdp->sdp_connection->c_address);
}
for (attr = m->m_attributes; attr; attr = attr->a_next) {
if (!strcasecmp(attr->a_name, "T38FaxVersion") && attr->a_value) {
t38_options->T38FaxVersion = (uint16_t) atoi(attr->a_value);
} else if (!strcasecmp(attr->a_name, "T38MaxBitRate") && attr->a_value) {
t38_options->T38MaxBitRate = (uint32_t) atoi(attr->a_value);
} else if (!strcasecmp(attr->a_name, "T38FaxFillBitRemoval")) {
t38_options->T38FaxFillBitRemoval = switch_safe_atoi(attr->a_value, 1);
} else if (!strcasecmp(attr->a_name, "T38FaxTranscodingMMR")) {
t38_options->T38FaxTranscodingMMR = switch_safe_atoi(attr->a_value, 1);
} else if (!strcasecmp(attr->a_name, "T38FaxTranscodingJBIG")) {
t38_options->T38FaxTranscodingJBIG = switch_safe_atoi(attr->a_value, 1);
} else if (!strcasecmp(attr->a_name, "T38FaxRateManagement") && attr->a_value) {
t38_options->T38FaxRateManagement = switch_core_session_strdup(session, attr->a_value);
} else if (!strcasecmp(attr->a_name, "T38FaxMaxBuffer") && attr->a_value) {
t38_options->T38FaxMaxBuffer = (uint32_t) atoi(attr->a_value);
} else if (!strcasecmp(attr->a_name, "T38FaxMaxDatagram") && attr->a_value) {
t38_options->T38FaxMaxDatagram = (uint32_t) atoi(attr->a_value);
} else if (!strcasecmp(attr->a_name, "T38FaxUdpEC") && attr->a_value) {
t38_options->T38FaxUdpEC = switch_core_session_strdup(session, attr->a_value);
} else if (!strcasecmp(attr->a_name, "T38VendorInfo") && attr->a_value) {
t38_options->T38VendorInfo = switch_core_session_strdup(session, attr->a_value);
}
}
switch_channel_set_variable(session->channel, "has_t38", "true");
switch_channel_set_private(session->channel, "t38_options", t38_options);
switch_channel_set_app_flag_key("T38", session->channel, CF_APP_T38);
switch_channel_execute_on(session->channel, "sip_execute_on_image");
switch_channel_api_on(session->channel, "sip_api_on_image");
return t38_options;
}
SWITCH_DECLARE(switch_status_t) switch_core_media_check_autoadj(switch_core_session_t *session)
{
switch_rtp_engine_t *a_engine;
switch_rtp_engine_t *v_engine;
switch_rtp_engine_t *t_engine;
switch_media_handle_t *smh;
const char *val;
int x = 0;
switch_assert(session);
if (!(smh = session->media_handle)) {
return SWITCH_STATUS_FALSE;
}
a_engine = &smh->engines[SWITCH_MEDIA_TYPE_AUDIO];
v_engine = &smh->engines[SWITCH_MEDIA_TYPE_VIDEO];
t_engine = &smh->engines[SWITCH_MEDIA_TYPE_TEXT];
if (!switch_media_handle_test_media_flag(smh, SCMF_DISABLE_RTP_AUTOADJ) &&
!((val = switch_channel_get_variable(session->channel, "disable_rtp_auto_adjust")) && switch_true(val)) &&
!switch_channel_test_flag(session->channel, CF_AVPF)) {
/* Reactivate the NAT buster flag. */
if (a_engine->rtp_session) {
switch_rtp_set_flag(a_engine->rtp_session, SWITCH_RTP_FLAG_AUTOADJ);
x++;
}
if (v_engine->rtp_session) {
switch_rtp_set_flag(v_engine->rtp_session, SWITCH_RTP_FLAG_AUTOADJ);
x++;
}
if (t_engine->rtp_session) {
switch_rtp_set_flag(t_engine->rtp_session, SWITCH_RTP_FLAG_AUTOADJ);
x++;
}
}
return x ? SWITCH_STATUS_SUCCESS : SWITCH_STATUS_FALSE;
}
SWITCH_DECLARE(switch_status_t) switch_core_media_get_vid_params(switch_core_session_t *session, switch_vid_params_t *vid_params)
{
switch_media_handle_t *smh;
switch_assert(session);
if (!(smh = session->media_handle)) {
return SWITCH_STATUS_FALSE;
}
switch_mutex_lock(smh->control_mutex);
*vid_params = smh->vid_params;
switch_mutex_unlock(smh->control_mutex);
return SWITCH_STATUS_SUCCESS;
}
SWITCH_DECLARE(switch_t38_options_t *) switch_core_media_extract_t38_options(switch_core_session_t *session, const char *r_sdp)
{
sdp_media_t *m;
sdp_parser_t *parser = NULL;
sdp_session_t *sdp;
switch_t38_options_t *t38_options = NULL;
if (!(parser = sdp_parse(NULL, r_sdp, (int) strlen(r_sdp), 0))) {
return NULL;
}
if (!(sdp = sdp_session(parser))) {
sdp_parser_free(parser);
return NULL;
}
for (m = sdp->sdp_media; m; m = m->m_next) {
if (m->m_proto == sdp_proto_udptl && m->m_type == sdp_media_image && m->m_port) {
t38_options = switch_core_media_process_udptl(session, sdp, m);
break;
}
}
sdp_parser_free(parser);
return t38_options;
}
//?
SWITCH_DECLARE(switch_status_t) switch_core_media_process_t38_passthru(switch_core_session_t *session,
switch_core_session_t *other_session, switch_t38_options_t *t38_options)
{
char *remote_host;
switch_port_t remote_port;
char tmp[32] = "";
switch_rtp_engine_t *a_engine;
switch_media_handle_t *smh;
switch_assert(session);
if (!(smh = session->media_handle)) {
return SWITCH_STATUS_FALSE;
}
a_engine = &smh->engines[SWITCH_MEDIA_TYPE_AUDIO];
remote_host = switch_rtp_get_remote_host(a_engine->rtp_session);
remote_port = switch_rtp_get_remote_port(a_engine->rtp_session);
a_engine->cur_payload_map->remote_sdp_ip = switch_core_session_strdup(session, t38_options->remote_ip);
a_engine->cur_payload_map->remote_sdp_port = t38_options->remote_port;
if (remote_host && remote_port && !strcmp(remote_host, a_engine->cur_payload_map->remote_sdp_ip) &&
remote_port == a_engine->cur_payload_map->remote_sdp_port) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG,
"Audio params are unchanged for %s.\n",
switch_channel_get_name(session->channel));
} else {
const char *err = NULL;
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG,
"Audio params changed for %s from %s:%d to %s:%d\n",
switch_channel_get_name(session->channel),
remote_host, remote_port, a_engine->cur_payload_map->remote_sdp_ip, a_engine->cur_payload_map->remote_sdp_port);
switch_snprintf(tmp, sizeof(tmp), "%d", a_engine->cur_payload_map->remote_sdp_port);
switch_channel_set_variable(session->channel, SWITCH_REMOTE_MEDIA_IP_VARIABLE, a_engine->cur_payload_map->remote_sdp_ip);
switch_channel_set_variable(session->channel, SWITCH_REMOTE_MEDIA_PORT_VARIABLE, tmp);
if (switch_rtp_set_remote_address(a_engine->rtp_session, a_engine->cur_payload_map->remote_sdp_ip,
a_engine->cur_payload_map->remote_sdp_port, 0, SWITCH_TRUE, &err) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "AUDIO RTP REPORTS ERROR: [%s]\n", err);
switch_channel_hangup(session->channel, SWITCH_CAUSE_INCOMPATIBLE_DESTINATION);
}
switch_channel_execute_on(session->channel, "execute_on_audio_change");
}
switch_core_media_copy_t38_options(t38_options, other_session);
return SWITCH_STATUS_SUCCESS;
}
SWITCH_DECLARE(switch_status_t) switch_core_session_get_payload_code(switch_core_session_t *session,
switch_media_type_t type,
const char *iananame,
uint32_t rate,
const char *fmtp_in,
switch_payload_t *ptP,
switch_payload_t *recv_ptP,
char **fmtpP)
{
payload_map_t *pmap;
switch_media_handle_t *smh;
switch_rtp_engine_t *engine;
switch_payload_t pt = 0, recv_pt = 0;
int found = 0;
char *fmtp = NULL;
switch_assert(session);
if (!(smh = session->media_handle)) {
return SWITCH_STATUS_FALSE;
}
engine = &smh->engines[type];
switch_mutex_lock(smh->sdp_mutex);
for (pmap = engine->payload_map; pmap ; pmap = pmap->next) {
char *fmtp_a = pmap->rm_fmtp;
if (!pmap->allocated) continue;
if (!fmtp_a) fmtp_a = "";
if (!fmtp_in) fmtp_in = "";
if (!strcasecmp(pmap->iananame, iananame) && !strcasecmp(fmtp_a, fmtp_in) && (!rate || (rate == pmap->rate))) {
pt = pmap->pt;
recv_pt = pmap->recv_pt;
fmtp = pmap->rm_fmtp;
found++;
break;
}
}
switch_mutex_unlock(smh->sdp_mutex);
if (found) {
if (ptP) {
*ptP = pt;
}
if (recv_ptP) {
*recv_ptP = recv_pt;
}
if (!zstr(fmtp) && fmtpP) {
*fmtpP = fmtp;
}
return SWITCH_STATUS_SUCCESS;
}
return SWITCH_STATUS_FALSE;
}
SWITCH_DECLARE(payload_map_t *) switch_core_media_add_payload_map(switch_core_session_t *session,
switch_media_type_t type,
const char *name,
const char *modname,
const char *fmtp,
switch_sdp_type_t sdp_type,
uint32_t pt,
uint32_t rate,
uint32_t ptime,
uint32_t channels,
uint8_t negotiated)
{
payload_map_t *pmap;
int exists = 0;
switch_media_handle_t *smh;
switch_rtp_engine_t *engine;
switch_assert(session);
if (!(smh = session->media_handle)) {
return NULL;
}
engine = &smh->engines[type];
switch_mutex_lock(smh->sdp_mutex);
for (pmap = engine->payload_map; pmap && pmap->allocated; pmap = pmap->next) {
if (sdp_type == SDP_TYPE_RESPONSE) {
switch(type) {
case SWITCH_MEDIA_TYPE_TEXT:
exists = (type == pmap->type && !strcasecmp(name, pmap->iananame));
break;
case SWITCH_MEDIA_TYPE_AUDIO:
exists = (type == pmap->type && !strcasecmp(name, pmap->iananame) && pmap->pt == pt && (!pmap->rate || rate == pmap->rate) && (!pmap->ptime || pmap->ptime == ptime));
break;
case SWITCH_MEDIA_TYPE_VIDEO:
if (sdp_type == SDP_TYPE_RESPONSE) {
exists = (pmap->sdp_type == SDP_TYPE_REQUEST && type == pmap->type && !strcasecmp(name, pmap->iananame));
} else {
exists = (type == pmap->type && !strcasecmp(name, pmap->iananame));
}
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG1, "CHECK PMAP %s:%s %d %s:%s %d ... %d\n",
name, sdp_type == SDP_TYPE_REQUEST ? "REQ" : "RES", pt,
pmap->iananame, pmap->sdp_type == SDP_TYPE_REQUEST ? "REQ" : "RES", pmap->pt, exists);
break;
}
if (exists) {
if (!zstr(fmtp) && !zstr(pmap->rm_fmtp)) {
if (strcmp(pmap->rm_fmtp, fmtp)) {
exists = 0;
continue;
}
}
break;
}
} else {
if (type == SWITCH_MEDIA_TYPE_TEXT) {
exists = (type == pmap->type && !strcasecmp(name, pmap->iananame) && pmap->pt == pt);
} else {
exists = (type == pmap->type && !strcasecmp(name, pmap->iananame) && pmap->pt == pt && (!pmap->rate || rate == pmap->rate) && (!pmap->ptime || pmap->ptime == ptime));
}
if (exists) {
if (type != SWITCH_MEDIA_TYPE_TEXT && !zstr(fmtp) && !zstr(pmap->rm_fmtp)) {
if (strcmp(pmap->rm_fmtp, fmtp)) {
exists = 0;
continue;
}
}
break;
}
}
}
if (!exists) {
switch_ssize_t hlen = -1;
if (engine->payload_map && !engine->payload_map->allocated) {
pmap = engine->payload_map;
} else {
pmap = switch_core_alloc(session->pool, sizeof(*pmap));
}
pmap->type = type;
pmap->iananame = switch_core_strdup(session->pool, name);
pmap->rm_encoding = pmap->iananame;
pmap->hash = switch_ci_hashfunc_default(pmap->iananame, &hlen);
pmap->channels = 1;
}
if (ptime) {
pmap->ptime = ptime;
}
if (rate) {
pmap->rate = rate;
}
if (channels) {
pmap->channels = channels;
}
if (modname) {
pmap->modname = switch_core_strdup(session->pool, modname);
}
if (!zstr(fmtp)) {
if (sdp_type == SDP_TYPE_REQUEST || !exists) {
pmap->rm_fmtp = switch_core_strdup(session->pool, fmtp);
}
}
pmap->allocated = 1;
pmap->recv_pt = (switch_payload_t) pt;
if (sdp_type == SDP_TYPE_REQUEST || !exists) {
pmap->pt = (switch_payload_t) pt;
}
if (negotiated) {
pmap->negotiated = negotiated;
}
if (!exists) {
pmap->sdp_type = sdp_type;
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG1, "ADD PMAP %s %s %d\n", sdp_type == SDP_TYPE_REQUEST ? "REQ" : "RES", name, pt);
if (pmap == engine->payload_map) {
engine->pmap_tail = pmap;
} else if (!engine->payload_map) {
engine->payload_map = engine->pmap_tail = pmap;
} else {
engine->pmap_tail->next = pmap;
engine->pmap_tail = engine->pmap_tail->next;
}
}
switch_mutex_unlock(smh->sdp_mutex);
return pmap;
}
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;
switch_assert(session);
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 = smh->mparams->outbound_codec_string;
fallback = smh->mparams->inbound_codec_string;
} else {
preferred = smh->mparams->inbound_codec_string;
fallback = smh->mparams->outbound_codec_string;
}
}