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mod_spandsp_fax.c
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mod_spandsp_fax.c
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/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2005-2014, 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 mod_fax.
*
* The Initial Developer of the Original Code is
* Massimo Cetra <devel@navynet.it>
*
* Portions created by the Initial Developer are Copyright (C)
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Brian West <brian@freeswitch.org>
* Anthony Minessale II <anthm@freeswitch.org>
* Steve Underwood <steveu@coppice.org>
* Antonio Gallo <agx@linux.it>
* mod_spandsp_fax.c -- Fax applications provided by SpanDSP
*
*/
#include "mod_spandsp.h"
#include "udptl.h"
#define LOCAL_FAX_MAX_DATAGRAM 400
#define MAX_FEC_ENTRIES 4
#define MAX_FEC_SPAN 4
#define DEFAULT_FEC_ENTRIES 3
#define DEFAULT_FEC_SPAN 3
/*****************************************************************************
OUR DEFINES AND STRUCTS
*****************************************************************************/
typedef enum {
T38_MODE,
AUDIO_MODE,
T38_GATEWAY_MODE
} transport_mode_t;
typedef enum {
T38_MODE_UNKNOWN = 0,
T38_MODE_NEGOTIATED = 1,
T38_MODE_REQUESTED = 2,
T38_MODE_REFUSED = -1,
} t38_mode_t;
const char * get_t38_status(t38_mode_t mode)
{
const char *str = "off";
switch(mode) {
case T38_MODE_NEGOTIATED:
str = "negotiated";
break;
case T38_MODE_REQUESTED:
str = "requested";
break;
case T38_MODE_REFUSED:
str = "refused";
break;
default:
break;
}
return str;
}
struct pvt_s {
switch_core_session_t *session;
mod_spandsp_fax_application_mode_t app_mode;
t30_state_t *t30;
fax_state_t *fax_state;
t38_terminal_state_t *t38_state;
t38_gateway_state_t *t38_gateway_state;
t38_core_state_t *t38_core;
switch_mutex_t *mutex;
udptl_state_t *udptl_state;
char *filename;
char *ident;
char *header;
char *timezone;
int use_ecm;
int disable_v17;
int enable_tep;
int enable_colour_fax;
int enable_image_resizing;
int enable_colour_to_bilevel;
int enable_grayscale_to_bilevel;
int verbose;
switch_log_level_t verbose_log_level;
FILE *trace_file;
int caller;
int tx_page_start;
int tx_page_end;
int done;
t38_mode_t t38_mode;
struct pvt_s *next;
};
typedef struct pvt_s pvt_t;
static void launch_timer_thread(void);
static struct {
pvt_t *head;
switch_mutex_t *mutex;
switch_thread_t *thread;
int thread_running;
} t38_state_list;
static void wake_thread(int force)
{
if (force) {
switch_thread_cond_signal(spandsp_globals.cond);
return;
}
if (switch_mutex_trylock(spandsp_globals.cond_mutex) == SWITCH_STATUS_SUCCESS) {
switch_thread_cond_signal(spandsp_globals.cond);
switch_mutex_unlock(spandsp_globals.cond_mutex);
}
}
static int add_pvt(pvt_t *pvt)
{
int r = 0;
if (t38_state_list.thread_running == 1) {
switch_mutex_lock(t38_state_list.mutex);
pvt->next = t38_state_list.head;
t38_state_list.head = pvt;
switch_mutex_unlock(t38_state_list.mutex);
r = 1;
wake_thread(0);
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Error launching thread\n");
}
return r;
}
static int del_pvt(pvt_t *del_pvt)
{
pvt_t *p, *l = NULL;
int r = 0;
switch_mutex_lock(t38_state_list.mutex);
for (p = t38_state_list.head; p; p = p->next) {
if (p == del_pvt) {
if (l) {
l->next = p->next;
} else {
t38_state_list.head = p->next;
}
p->next = NULL;
r = 1;
break;
}
l = p;
}
switch_mutex_unlock(t38_state_list.mutex);
wake_thread(0);
return r;
}
static void *SWITCH_THREAD_FUNC timer_thread_run(switch_thread_t *thread, void *obj)
{
switch_timer_t timer = { 0 };
pvt_t *pvt;
int samples = 160;
int ms = 20;
if (switch_core_timer_init(&timer, "soft", ms, samples, NULL) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "timer init failed.\n");
t38_state_list.thread_running = -1;
goto end;
}
t38_state_list.thread_running = 1;
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "FAX timer thread started.\n");
switch_mutex_lock(spandsp_globals.cond_mutex);
while(t38_state_list.thread_running == 1) {
switch_mutex_lock(t38_state_list.mutex);
if (!t38_state_list.head) {
switch_mutex_unlock(t38_state_list.mutex);
switch_thread_cond_wait(spandsp_globals.cond, spandsp_globals.cond_mutex);
switch_core_timer_sync(&timer);
continue;
}
for (pvt = t38_state_list.head; pvt; pvt = pvt->next) {
if (pvt->udptl_state && pvt->session && switch_channel_ready(switch_core_session_get_channel(pvt->session))) {
switch_mutex_lock(pvt->mutex);
t38_terminal_send_timeout(pvt->t38_state, samples);
switch_mutex_unlock(pvt->mutex);
}
}
switch_mutex_unlock(t38_state_list.mutex);
switch_core_timer_next(&timer);
}
switch_mutex_unlock(spandsp_globals.cond_mutex);
end:
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "FAX timer thread ended.\n");
if (timer.timer_interface) {
switch_core_timer_destroy(&timer);
}
return NULL;
}
static void launch_timer_thread(void)
{
switch_threadattr_t *thd_attr = NULL;
switch_threadattr_create(&thd_attr, spandsp_globals.pool);
switch_threadattr_stacksize_set(thd_attr, SWITCH_THREAD_STACKSIZE);
switch_thread_create(&t38_state_list.thread, thd_attr, timer_thread_run, NULL, spandsp_globals.pool);
}
/*****************************************************************************
LOGGING AND HELPER FUNCTIONS
*****************************************************************************/
static void counter_increment(void)
{
switch_mutex_lock(spandsp_globals.mutex);
spandsp_globals.total_sessions++;
switch_mutex_unlock(spandsp_globals.mutex);
}
void mod_spandsp_log_message(void *user_data, int level, const char *msg)
{
int fs_log_level;
mod_spandsp_log_data_t *log_data = (mod_spandsp_log_data_t *)user_data;
switch_core_session_t *session = log_data ? log_data->session : NULL;
switch_log_level_t verbose_log_level = log_data ? log_data->verbose_log_level : spandsp_globals.verbose_log_level;
switch (level) {
case SPAN_LOG_NONE:
return;
case SPAN_LOG_ERROR:
case SPAN_LOG_PROTOCOL_ERROR:
fs_log_level = SWITCH_LOG_ERROR;
break;
case SPAN_LOG_WARNING:
case SPAN_LOG_PROTOCOL_WARNING:
fs_log_level = SWITCH_LOG_WARNING;
break;
case SPAN_LOG_FLOW:
case SPAN_LOG_FLOW_2:
case SPAN_LOG_FLOW_3:
default: /* SPAN_LOG_DEBUG, SPAN_LOG_DEBUG_2, SPAN_LOG_DEBUG_3 */
fs_log_level = verbose_log_level;
break;
}
if (!zstr(msg)) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), fs_log_level, "%s", msg);
if (log_data && log_data->trace_file) {
fwrite(msg, strlen(msg) * sizeof(const char), 1, log_data->trace_file);
}
}
}
static int phase_b_handler(void *user_data, int result)
{
t30_stats_t t30_stats;
switch_core_session_t *session;
switch_channel_t *channel;
const char *local_ident;
const char *far_ident;
char *fax_transfer_rate = NULL;
char *fax_document_total_pages = NULL;
pvt_t *pvt;
switch_event_t *event;
const char *total_pages_str = "";
pvt = (pvt_t *) user_data;
switch_assert(pvt);
session = pvt->session;
switch_assert(session);
channel = switch_core_session_get_channel(session);
switch_assert(channel);
t30_get_transfer_statistics(pvt->t30, &t30_stats);
local_ident = switch_str_nil(t30_get_tx_ident(pvt->t30));
far_ident = switch_str_nil(t30_get_rx_ident(pvt->t30));
fax_transfer_rate = switch_core_session_sprintf(session, "%i", t30_stats.bit_rate);
if (fax_transfer_rate) {
switch_channel_set_variable(channel, "fax_transfer_rate", fax_transfer_rate);
}
if (pvt->app_mode == FUNCTION_TX) {
fax_document_total_pages = switch_core_session_sprintf(session, "%i", t30_stats.pages_in_file);
if (fax_document_total_pages) {
switch_channel_set_variable(channel, "fax_document_total_pages", fax_document_total_pages);
}
}
switch_channel_set_variable(channel, "fax_ecm_used", (t30_stats.error_correcting_mode) ? "on" : "off");
switch_channel_set_variable(channel, "fax_t38_status", get_t38_status(pvt->t38_mode));
switch_channel_set_variable(channel, "fax_local_station_id", local_ident);
switch_channel_set_variable(channel, "fax_remote_station_id", far_ident);
switch_channel_set_variable(channel, "fax_remote_country", switch_str_nil(t30_get_rx_country(pvt->t30)));
switch_channel_set_variable(channel, "fax_remote_vendor", switch_str_nil(t30_get_rx_vendor(pvt->t30)));
switch_channel_set_variable(channel, "fax_remote_model", switch_str_nil(t30_get_rx_model(pvt->t30)));
if (pvt->app_mode == FUNCTION_TX) {
total_pages_str = switch_core_session_sprintf(session, "Total fax pages: %s\n", fax_document_total_pages);
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO,
"=== Negotiation Result =======================================================\n"
"Remote station id: %s\n"
"Local station id: %s\n"
"Transfer Rate: %i\n"
"ECM status %s\n"
"T38 status %s\n"
"remote country: %s\n"
"remote vendor: %s\n"
"remote model: %s\n"
"%s"
"==============================================================================\n",
far_ident,
local_ident,
t30_stats.bit_rate,
(t30_stats.error_correcting_mode) ? "on" : "off",
get_t38_status(pvt->t38_mode),
switch_str_nil(t30_get_rx_country(pvt->t30)),
switch_str_nil(t30_get_rx_vendor(pvt->t30)),
switch_str_nil(t30_get_rx_model(pvt->t30)),
total_pages_str);
switch_channel_execute_on(channel, "execute_on_fax_phase_b");
/* Fire event */
if (switch_event_create_subclass(&event, SWITCH_EVENT_CUSTOM, pvt->app_mode == FUNCTION_TX ? SPANDSP_EVENT_TXFAXNEGOCIATERESULT : SPANDSP_EVENT_RXFAXNEGOCIATERESULT) == SWITCH_STATUS_SUCCESS) {
switch_channel_event_set_data(channel, event);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "uuid", switch_core_session_get_uuid(session));
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-transfer-rate", fax_transfer_rate);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-ecm-used", (t30_stats.error_correcting_mode) ? "on" : "off");
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-t38-status", get_t38_status(pvt->t38_mode));
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-local-station-id", local_ident);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-remote-station-id", far_ident);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-remote-country", switch_str_nil(t30_get_rx_country(pvt->t30)));
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-remote-vendor", switch_str_nil(t30_get_rx_vendor(pvt->t30)));
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-remote-model", switch_str_nil(t30_get_rx_model(pvt->t30)));
if (pvt->app_mode == FUNCTION_TX) {
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-document-total-pages", fax_document_total_pages);
}
switch_event_fire(&event);
}
return T30_ERR_OK;
}
static int phase_d_handler(void *user_data, int msg)
{
t30_stats_t t30_stats;
char *fax_file_image_resolution = NULL;
char *fax_line_image_resolution = NULL;
char *fax_file_image_pixel_size = NULL;
char *fax_line_image_pixel_size = NULL;
char *fax_image_size = NULL;
char *fax_bad_rows = NULL;
char *fax_encoding = NULL;
char *fax_longest_bad_row_run = NULL;
char *fax_document_transferred_pages = NULL;
char *fax_document_total_pages = NULL;
const char *total_pages_str = "";
switch_core_session_t *session;
switch_channel_t *channel;
pvt_t *pvt;
switch_event_t *event;
pvt = (pvt_t *) user_data;
switch_assert(pvt);
session = pvt->session;
switch_assert(session);
channel = switch_core_session_get_channel(session);
switch_assert(channel);
t30_get_transfer_statistics(pvt->t30, &t30_stats);
/* Set Channel Variable */
fax_line_image_resolution = switch_core_session_sprintf(session, "%ix%i", t30_stats.x_resolution, t30_stats.y_resolution);
if (fax_line_image_resolution) {
switch_channel_set_variable(channel, "fax_image_resolution", fax_line_image_resolution);
}
fax_file_image_resolution = switch_core_session_sprintf(session, "%ix%i", t30_stats.image_x_resolution, t30_stats.image_y_resolution);
if (fax_file_image_resolution) {
switch_channel_set_variable(channel, "fax_file_image_resolution", fax_file_image_resolution);
}
fax_line_image_pixel_size = switch_core_session_sprintf(session, "%ix%i", t30_stats.width, t30_stats.length);
if (fax_line_image_pixel_size) {
switch_channel_set_variable(channel, "fax_image_pixel_size", fax_line_image_pixel_size);;
}
fax_file_image_pixel_size = switch_core_session_sprintf(session, "%ix%i", t30_stats.image_width, t30_stats.image_length);
if (fax_file_image_pixel_size) {
switch_channel_set_variable(channel, "fax_file_image_pixel_size", fax_file_image_pixel_size);;
}
fax_image_size = switch_core_session_sprintf(session, "%d", t30_stats.image_size);
if (fax_image_size) {
switch_channel_set_variable(channel, "fax_image_size", fax_image_size);
}
fax_bad_rows = switch_core_session_sprintf(session, "%d", t30_stats.bad_rows);
if (fax_bad_rows) {
switch_channel_set_variable(channel, "fax_bad_rows", fax_bad_rows);
}
fax_longest_bad_row_run = switch_core_session_sprintf(session, "%d", t30_stats.longest_bad_row_run);
if (fax_longest_bad_row_run) {
switch_channel_set_variable(channel, "fax_longest_bad_row_run", fax_longest_bad_row_run);
}
fax_encoding = switch_core_session_sprintf(session, "%d", t30_stats.compression);
if (fax_encoding) {
switch_channel_set_variable(channel, "fax_encoding", fax_encoding);
}
switch_channel_set_variable(channel, "fax_encoding_name", t4_compression_to_str(t30_stats.compression));
fax_document_transferred_pages = switch_core_session_sprintf(session, "%d", (pvt->app_mode == FUNCTION_TX) ? t30_stats.pages_tx : t30_stats.pages_rx);
if (fax_document_transferred_pages) {
switch_channel_set_variable(channel, "fax_document_transferred_pages", fax_document_transferred_pages);
}
if (pvt->app_mode == FUNCTION_TX) {
fax_document_total_pages = switch_core_session_sprintf(session, "%i", t30_stats.pages_in_file);
if (fax_document_total_pages) {
switch_channel_set_variable(channel, "fax_document_total_pages", fax_document_total_pages);
}
}
if (pvt->app_mode == FUNCTION_TX) {
total_pages_str = switch_core_session_sprintf(session, "Total fax pages: %s\n", fax_document_total_pages);
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO,
"==== Page %s===========================================================\n"
"Page no = %d\n"
"%s"
"Image type = %s (%s in the file)\n"
"Image size = %d x %d pixels (%d x %d pixels in the file)\n"
"Image resolution = %d/m x %d/m (%d/m x %d/m in the file)\n"
"Compression = %s (%d)\n"
"Compressed image size = %d bytes\n"
"Bad rows = %d\n"
"Longest bad row run = %d\n"
"==============================================================================\n",
pvt->app_mode == FUNCTION_TX ? "Sent ====": "Received ",
(pvt->app_mode == FUNCTION_TX) ? t30_stats.pages_tx : t30_stats.pages_rx,
total_pages_str,
t4_image_type_to_str(t30_stats.type), t4_image_type_to_str(t30_stats.image_type),
t30_stats.width, t30_stats.length, t30_stats.image_width, t30_stats.image_length,
t30_stats.x_resolution, t30_stats.y_resolution, t30_stats.image_x_resolution, t30_stats.image_y_resolution,
t4_compression_to_str(t30_stats.compression), t30_stats.compression,
t30_stats.image_size,
t30_stats.bad_rows,
t30_stats.longest_bad_row_run);
switch_channel_execute_on(channel, "execute_on_fax_phase_d");
if (switch_event_create_subclass(&event, SWITCH_EVENT_CUSTOM, pvt->app_mode == FUNCTION_TX ? SPANDSP_EVENT_TXFAXPAGERESULT : SPANDSP_EVENT_RXFAXPAGERESULT) == SWITCH_STATUS_SUCCESS) {
switch_channel_event_set_data(channel, event);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "uuid", switch_core_session_get_uuid(session));
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-document-transferred-pages", fax_document_transferred_pages);
if (pvt->app_mode == FUNCTION_TX) {
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-document-total-pages", fax_document_total_pages);
}
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-image-resolution", fax_line_image_resolution);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-file-image-resolution", fax_file_image_resolution);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-image-size", fax_image_size);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-image-pixel-size", fax_line_image_pixel_size);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-file-image-pixel-size", fax_file_image_pixel_size);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-bad-rows", fax_bad_rows);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-longest-bad-row-run", fax_longest_bad_row_run);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-encoding", fax_encoding);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-encoding-name", t4_compression_to_str(t30_stats.compression));
switch_event_fire(&event);
}
return T30_ERR_OK; /* I don't think this does anything */
}
/*
* Called at the end of the document
*/
static void phase_e_handler(void *user_data, int result)
{
t30_stats_t t;
const char *local_ident;
const char *far_ident;
switch_core_session_t *session;
switch_channel_t *channel;
pvt_t *pvt;
char *fax_document_transferred_pages = NULL;
char *fax_document_total_pages = NULL;
char *fax_image_resolution = NULL;
char *fax_image_size = NULL;
char *fax_bad_rows = NULL;
char *fax_transfer_rate = NULL;
char *fax_result_code = NULL;
switch_event_t *event;
const char *var;
char *expanded;
const char *fax_result_str = "";
pvt = (pvt_t *) user_data;
switch_assert(pvt);
session = pvt->session;
switch_assert(session);
channel = switch_core_session_get_channel(session);
switch_assert(channel);
t30_get_transfer_statistics(pvt->t30, &t);
local_ident = switch_str_nil(t30_get_tx_ident(pvt->t30));
far_ident = switch_str_nil(t30_get_rx_ident(pvt->t30));
if (result == T30_ERR_OK) {
if (pvt->app_mode == FUNCTION_TX) {
fax_result_str = switch_core_session_sprintf(session, "Fax successfully sent.\n");
} else if (pvt->app_mode == FUNCTION_RX) {
fax_result_str = switch_core_session_sprintf(session, "Fax successfully received.\n");
} else {
fax_result_str = switch_core_session_sprintf(session, "Fax successfully managed. How ?\n");
}
switch_channel_set_variable(channel, "fax_success", "1");
} else {
fax_result_str = switch_core_session_sprintf(session, "Fax processing not successful - result (%d) %s.\n", result,
t30_completion_code_to_str(result));
switch_channel_set_variable(channel, "fax_success", "0");
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO,
"==============================================================================\n"
"%s"
"Remote station id: %s\n"
"Local station id: %s\n"
"Pages transferred: %i\n"
"Total fax pages: %i\n"
"Image resolution: %ix%i\n"
"Transfer Rate: %i\n"
"ECM status %s\n"
"T38 status %s\n"
"remote country: %s\n"
"remote vendor: %s\n"
"remote model: %s\n"
"==============================================================================\n",
fax_result_str,
far_ident,
local_ident,
pvt->app_mode == FUNCTION_TX ? t.pages_tx : t.pages_rx,
t.pages_in_file,
t.x_resolution, t.y_resolution,
t.bit_rate,
(t.error_correcting_mode) ? "on" : "off",
get_t38_status(pvt->t38_mode),
switch_str_nil(t30_get_rx_country(pvt->t30)),
switch_str_nil(t30_get_rx_vendor(pvt->t30)),
switch_str_nil(t30_get_rx_model(pvt->t30)));
/*
Set our channel variables, variables are also used in event
*/
fax_result_code = switch_core_session_sprintf(session, "%i", result);
if (fax_result_code) {
switch_channel_set_variable(channel, "fax_result_code", fax_result_code);
}
switch_channel_set_variable(channel, "fax_result_text", t30_completion_code_to_str(result));
switch_channel_set_variable(channel, "fax_ecm_used", (t.error_correcting_mode) ? "on" : "off");
switch_channel_set_variable(channel, "fax_t38_status", get_t38_status(pvt->t38_mode));
switch_channel_set_variable(channel, "fax_local_station_id", local_ident);
switch_channel_set_variable(channel, "fax_remote_station_id", far_ident);
fax_document_transferred_pages = switch_core_session_sprintf(session, "%i", pvt->app_mode == FUNCTION_TX ? t.pages_tx : t.pages_rx);
if (fax_document_transferred_pages) {
switch_channel_set_variable(channel, "fax_document_transferred_pages", fax_document_transferred_pages);
}
fax_document_total_pages = switch_core_session_sprintf(session, "%i", t.pages_in_file);
if (fax_document_total_pages) {
switch_channel_set_variable(channel, "fax_document_total_pages", fax_document_total_pages);
}
fax_image_resolution = switch_core_session_sprintf(session, "%ix%i", t.x_resolution, t.y_resolution);
if (fax_image_resolution) {
switch_channel_set_variable(channel, "fax_image_resolution", fax_image_resolution);
}
fax_image_size = switch_core_session_sprintf(session, "%d", t.image_size);
if (fax_image_size) {
switch_channel_set_variable(channel, "fax_image_size", fax_image_size);
}
fax_bad_rows = switch_core_session_sprintf(session, "%d", t.bad_rows);
if (fax_bad_rows) {
switch_channel_set_variable(channel, "fax_bad_rows", fax_bad_rows);
}
fax_transfer_rate = switch_core_session_sprintf(session, "%i", t.bit_rate);
if (fax_transfer_rate) {
switch_channel_set_variable(channel, "fax_transfer_rate", fax_transfer_rate);
}
/* switch_channel_hangup(channel, SWITCH_CAUSE_NORMAL_CLEARING); */
pvt->done = 1;
/* Fire event */
if (switch_event_create_subclass(&event, SWITCH_EVENT_CUSTOM, pvt->app_mode == FUNCTION_TX ? SPANDSP_EVENT_TXFAXRESULT : SPANDSP_EVENT_RXFAXRESULT) == SWITCH_STATUS_SUCCESS) {
switch_channel_event_set_data(channel, event);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-success", (result == T30_ERR_OK) ? "1" : "0");
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-result-code", fax_result_code);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-result-text", t30_completion_code_to_str(result));
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-document-transferred-pages", fax_document_transferred_pages);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-document-total-pages", fax_document_total_pages);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-image-resolution", fax_image_resolution);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-image-size", fax_image_size);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-bad-rows", fax_bad_rows);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-transfer-rate", fax_transfer_rate);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-ecm-used", (t.error_correcting_mode) ? "on" : "off");
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-t38-status", get_t38_status(pvt->t38_mode));
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-local-station-id", local_ident);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "fax-remote-station-id", far_ident);
switch_event_fire(&event);
}
if ((var = switch_channel_get_variable(channel, "system_on_fax_result"))) {
expanded = switch_channel_expand_variables(channel, var);
switch_system(expanded, SWITCH_FALSE);
if (expanded != var) {
free(expanded);
}
}
switch_channel_execute_on(channel, "execute_on_fax_result");
if (result == T30_ERR_OK) {
if ((var = switch_channel_get_variable(channel, "system_on_fax_success"))) {
expanded = switch_channel_expand_variables(channel, var);
switch_system(expanded, SWITCH_FALSE);
if (expanded != var) {
free(expanded);
}
}
switch_channel_execute_on(channel, "execute_on_fax_success");
switch_channel_api_on(channel, "api_on_fax_success");
} else {
if ((var = switch_channel_get_variable(channel, "system_on_fax_failure"))) {
expanded = switch_channel_expand_variables(channel, var);
switch_system(expanded, SWITCH_FALSE);
if (expanded != var) {
free(expanded);
}
}
switch_channel_execute_on(channel, "execute_on_fax_failure");
switch_channel_api_on(channel, "api_on_fax_failure");
}
}
static int t38_tx_packet_handler(t38_core_state_t *s, void *user_data, const uint8_t *buf, int len, int count)
{
switch_frame_t out_frame = { 0 };
switch_core_session_t *session;
pvt_t *pvt;
uint8_t pkt[LOCAL_FAX_MAX_DATAGRAM];
int x;
int r = 0;
pvt = (pvt_t *) user_data;
session = pvt->session;
/* we need to build a real packet here and make write_frame.packet and write_frame.packetlen point to it */
out_frame.flags = SFF_UDPTL_PACKET | SFF_PROXY_PACKET;
out_frame.packet = pkt;
out_frame.buflen = LOCAL_FAX_MAX_DATAGRAM;
if ((r = udptl_build_packet(pvt->udptl_state, pkt, buf, len)) > 0) {
out_frame.packetlen = r;
//switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "WRITE %d udptl bytes\n", out_frame.packetlen);
for (x = 0; x < count; x++) {
if (switch_core_session_write_frame(session, &out_frame, SWITCH_IO_FLAG_NONE, 0) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "INVALID WRITE: %d:%d\n", out_frame.packetlen, count);
r = -1;
break;
}
}
} else {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "INVALID PACKETLEN: %d PASSED: %d:%d\n", r, len, count);
}
if (r < 0) {
t30_state_t *t30;
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "TERMINATING T30 STATE\n");
if (pvt->t38_state && (t30 = t38_terminal_get_t30_state(pvt->t38_state))) {
t30_terminate(t30);
}
switch_yield(10000);
}
return r < 0 ? r : 0;
}
static switch_status_t spanfax_init(pvt_t *pvt, transport_mode_t trans_mode)
{
switch_core_session_t *session;
switch_channel_t *channel;
fax_state_t *fax;
t38_terminal_state_t *t38;
t30_state_t *t30;
const char *tmp;
const char *tz;
int fec_entries = DEFAULT_FEC_ENTRIES;
int fec_span = DEFAULT_FEC_SPAN;
int compressions;
session = (switch_core_session_t *) pvt->session;
switch_assert(session);
channel = switch_core_session_get_channel(session);
switch_assert(channel);
if ((tmp = switch_channel_get_variable(channel, "t38_gateway_redundancy"))) {
int tmp_value;
tmp_value = atoi(tmp);
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "FAX changing redundancy from %d:%d to %d:%d\n", fec_span, fec_entries, tmp_value, tmp_value );
fec_entries = tmp_value;
fec_span = tmp_value;
}
switch (trans_mode) {
case AUDIO_MODE:
if (pvt->fax_state == NULL) {
pvt->fax_state = (fax_state_t *) switch_core_session_alloc(pvt->session, sizeof(fax_state_t));
}
if (pvt->fax_state == NULL) {
return SWITCH_STATUS_FALSE;
}
fax = pvt->fax_state;
pvt->t30 = fax_get_t30_state(fax);
t30 = pvt->t30;
memset(fax, 0, sizeof(fax_state_t));
if (fax_init(fax, pvt->caller) == NULL) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Cannot initialize my fax structs\n");
return SWITCH_STATUS_FALSE;
}
fax_set_transmit_on_idle(fax, TRUE);
{
mod_spandsp_log_data_t *log_data = switch_core_session_alloc(pvt->session, sizeof(*log_data));
log_data->session = pvt->session;
log_data->verbose_log_level = pvt->verbose_log_level;
log_data->trace_file = pvt->trace_file;
span_log_set_message_handler(fax_get_logging_state(fax), mod_spandsp_log_message, log_data);
span_log_set_message_handler(t30_get_logging_state(t30), mod_spandsp_log_message, log_data);
}
if (pvt->verbose) {
span_log_set_level(fax_get_logging_state(fax), SPAN_LOG_SHOW_SEVERITY | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_FLOW);
span_log_set_level(t30_get_logging_state(t30), SPAN_LOG_SHOW_SEVERITY | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_FLOW);
}
break;
case T38_MODE:
{
switch_core_session_message_t msg = { 0 };
if (pvt->t38_state == NULL) {
pvt->t38_state = (t38_terminal_state_t *) switch_core_session_alloc(pvt->session, sizeof(t38_terminal_state_t));
}
if (pvt->t38_state == NULL) {
return SWITCH_STATUS_FALSE;
}
if (pvt->udptl_state == NULL) {
pvt->udptl_state = (udptl_state_t *) switch_core_session_alloc(pvt->session, sizeof(udptl_state_t));
}
if (pvt->udptl_state == NULL) {
t38_terminal_free(pvt->t38_state);
pvt->t38_state = NULL;
return SWITCH_STATUS_FALSE;
}
t38 = pvt->t38_state;
pvt->t30 = t38_terminal_get_t30_state(t38);
t30 = pvt->t30;
memset(t38, 0, sizeof(t38_terminal_state_t));
if (t38_terminal_init(t38, pvt->caller, t38_tx_packet_handler, pvt) == NULL) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Cannot initialize my T.38 structs\n");
return SWITCH_STATUS_FALSE;
}
pvt->t38_core = t38_terminal_get_t38_core_state(pvt->t38_state);
if (udptl_init(pvt->udptl_state, UDPTL_ERROR_CORRECTION_REDUNDANCY, fec_span, fec_entries,
(udptl_rx_packet_handler_t *) t38_core_rx_ifp_packet, (void *) pvt->t38_core) == NULL) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Cannot initialize my UDPTL structs\n");
return SWITCH_STATUS_FALSE;
}
msg.from = __FILE__;
msg.message_id = SWITCH_MESSAGE_INDICATE_UDPTL_MODE;
switch_core_session_receive_message(pvt->session, &msg);
{
mod_spandsp_log_data_t *log_data = switch_core_session_alloc(pvt->session, sizeof(*log_data));
log_data->session = pvt->session;
log_data->verbose_log_level = pvt->verbose_log_level;
log_data->trace_file = pvt->trace_file;
span_log_set_message_handler(t38_terminal_get_logging_state(t38), mod_spandsp_log_message, log_data);
span_log_set_message_handler(t30_get_logging_state(t30), mod_spandsp_log_message, log_data);
}
if (pvt->verbose) {
span_log_set_level(t38_terminal_get_logging_state(t38), SPAN_LOG_SHOW_SEVERITY | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_FLOW);
span_log_set_level(t30_get_logging_state(t30), SPAN_LOG_SHOW_SEVERITY | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_FLOW);
}
}
break;
case T38_GATEWAY_MODE:
if (pvt->t38_gateway_state == NULL) {
pvt->t38_gateway_state = (t38_gateway_state_t *) switch_core_session_alloc(pvt->session, sizeof(t38_gateway_state_t));
}
if (pvt->udptl_state == NULL) {
pvt->udptl_state = (udptl_state_t *) switch_core_session_alloc(pvt->session, sizeof(udptl_state_t));
}
if (t38_gateway_init(pvt->t38_gateway_state, t38_tx_packet_handler, pvt) == NULL) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Cannot initialize my T.38 structs\n");
t38_gateway_free(pvt->t38_gateway_state);
pvt->t38_gateway_state = NULL;
return SWITCH_STATUS_FALSE;
}
pvt->t38_core = t38_gateway_get_t38_core_state(pvt->t38_gateway_state);
if (udptl_init(pvt->udptl_state, UDPTL_ERROR_CORRECTION_REDUNDANCY, fec_span, fec_entries,
(udptl_rx_packet_handler_t *) t38_core_rx_ifp_packet, (void *) pvt->t38_core) == NULL) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Cannot initialize my UDPTL structs\n");
t38_gateway_free(pvt->t38_gateway_state);
udptl_release(pvt->udptl_state);
pvt->udptl_state = NULL;
return SWITCH_STATUS_FALSE;
}
t38_gateway_set_transmit_on_idle(pvt->t38_gateway_state, TRUE);
if (switch_true(switch_channel_get_variable(channel, "fax_v17_disabled"))) {
t38_gateway_set_supported_modems(pvt->t38_gateway_state, T30_SUPPORT_V29 | T30_SUPPORT_V27TER);
} else {
t38_gateway_set_supported_modems(pvt->t38_gateway_state, T30_SUPPORT_V17 | T30_SUPPORT_V29 | T30_SUPPORT_V27TER);
}
t38_gateway_set_tep_mode(pvt->t38_gateway_state, pvt->enable_tep);
t38_gateway_set_ecm_capability(pvt->t38_gateway_state, pvt->use_ecm);
switch_channel_set_variable(channel, "fax_ecm_requested", pvt->use_ecm ? "true" : "false");
{
mod_spandsp_log_data_t *log_data = switch_core_session_alloc(pvt->session, sizeof(*log_data));
log_data->session = pvt->session;
log_data->verbose_log_level = pvt->verbose_log_level;
log_data->trace_file = pvt->trace_file;
span_log_set_message_handler(t38_gateway_get_logging_state(pvt->t38_gateway_state), mod_spandsp_log_message, log_data);
span_log_set_message_handler(t38_core_get_logging_state(pvt->t38_core), mod_spandsp_log_message, log_data);
}
if (pvt->verbose) {
span_log_set_level(t38_gateway_get_logging_state(pvt->t38_gateway_state), SPAN_LOG_SHOW_SEVERITY | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_FLOW);
span_log_set_level(t38_core_get_logging_state(pvt->t38_core), SPAN_LOG_SHOW_SEVERITY | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_FLOW);
}
t38_set_t38_version(pvt->t38_core, 0);
return SWITCH_STATUS_SUCCESS;
default:
assert(0); /* What? */
return SWITCH_STATUS_SUCCESS;
} /* Switch trans mode */
/* All the things which are common to audio and T.38 FAX setup */
t30_set_tx_ident(t30, pvt->ident);
t30_set_tx_page_header_info(t30, pvt->header);
if (pvt->timezone && pvt->timezone[0]) {
if ((tz = switch_lookup_timezone(pvt->timezone)))
t30_set_tx_page_header_tz(t30, tz);
else
t30_set_tx_page_header_tz(t30, pvt->timezone);
}
t30_set_phase_e_handler(t30, phase_e_handler, pvt);
t30_set_phase_d_handler(t30, phase_d_handler, pvt);
t30_set_phase_b_handler(t30, phase_b_handler, pvt);
t30_set_supported_image_sizes(t30,
T4_SUPPORT_LENGTH_US_LETTER
| T4_SUPPORT_LENGTH_US_LEGAL
| T4_SUPPORT_LENGTH_UNLIMITED
| T4_SUPPORT_WIDTH_215MM
| T4_SUPPORT_WIDTH_255MM
| T4_SUPPORT_WIDTH_303MM);
t30_set_supported_bilevel_resolutions(t30,
T4_RESOLUTION_R8_STANDARD
| T4_RESOLUTION_R8_FINE
| T4_RESOLUTION_R8_SUPERFINE
| T4_RESOLUTION_R16_SUPERFINE
| T4_RESOLUTION_200_100
| T4_RESOLUTION_200_200
| T4_RESOLUTION_200_400
| T4_RESOLUTION_400_400);
compressions = T4_COMPRESSION_T4_1D
| T4_COMPRESSION_T4_2D
| T4_COMPRESSION_T6
| T4_COMPRESSION_T85
| T4_COMPRESSION_T85_L0;
if (pvt->enable_colour_fax) {
t30_set_supported_colour_resolutions(t30, T4_RESOLUTION_100_100
| T4_RESOLUTION_200_200
| T4_RESOLUTION_300_300
| T4_RESOLUTION_400_400);
compressions |= (T4_COMPRESSION_COLOUR | T4_COMPRESSION_T42_T81);
} else {
t30_set_supported_colour_resolutions(t30, 0);
}
if (pvt->enable_image_resizing)
compressions |= T4_COMPRESSION_RESCALING;
if (pvt->enable_colour_to_bilevel)