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chan-capi/chan_capi_command.c

393 lines
11 KiB

/*
*
Copyright (c) Dialogic, 2009.
*
This source file is supplied for the use with
Dialogic range of DIVA Server Adapters.
*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
*
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY OF ANY KIND WHATSOEVER INCLUDING ANY
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
*
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <sys/time.h>
#include <sys/signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <math.h>
#include <sys/types.h>
#include <ctype.h>
#include "chan_capi_platform.h"
#include "xlaw.h"
#include "chan_capi20.h"
#include "chan_capi.h"
#include "chan_capi_rtp.h"
#include "chan_capi_qsig.h"
#include "chan_capi_qsig_ecma.h"
#include "chan_capi_qsig_asn197ade.h"
#include "chan_capi_qsig_asn197no.h"
#include "chan_capi_utils.h"
#include "chan_capi_supplementary.h"
#include "chan_capi_chat.h"
#include "chan_capi_command.h"
typedef struct _pbx_capi_voice_command {
diva_entity_link_t link;
pbx_capi_command_proc_t pbx_capi_command;
char channel_command_digits[AST_MAX_EXTENSION+1];
int length; /* channel_command_digits length */
char command_name[64];
char command_parameters[128];
} pbx_capi_voice_command_t;
/*
* LOCALS
*/
static const char* pbx_capi_voicecommand_digits = "1234567890ABCD*#";
static int pbx_capi_command_nop(struct ast_channel *c, char *param);
static pbx_capi_voice_command_t* pbx_capi_find_command(struct capi_pvt *i, const char* name);
static pbx_capi_voice_command_t* pbx_capi_find_command_by_key(struct capi_pvt *i, const char* key);
static pbx_capi_voice_command_t* pbx_capi_voicecommand_find_digit_command(diva_entity_queue_t* q, const char* digits, int length, int* info);
static void pbx_capi_voicecommand_insert_command(diva_entity_queue_t* q, pbx_capi_voice_command_t* cmd);
/*
* voicecommand|key|param1|param2|...
*
*/
int pbx_capi_voicecommand(struct ast_channel *c, char *param)
{
struct capi_pvt *i;
pbx_capi_voice_command_t* cmd;
const char* command[2];
const char* key[2];
size_t length;
#ifdef CC_AST_HAS_VERSION_11_0
const struct ast_channel_tech *cur_tech = ast_channel_tech(c);
#else /* !defined(CC_AST_HAS_VERSION_11_0) */
const struct ast_channel_tech *cur_tech = c->tech;
#endif /* defined(CC_AST_HAS_VERSION_11_0) */
if (cur_tech == &capi_tech) {
i = CC_CHANNEL_PVT(c);
} else {
i = pbx_check_resource_plci(c);
}
if (i == 0) {
/*
Ignore command silently to ensure same context can be used to process
all types of calls or in case of fallback to NULL PLCI
*/
return 0;
}
if ((param == NULL) || (*param == 0)) { /* Remove all voice commands */
cc_mutex_lock(&i->lock);
pbx_capi_voicecommand_cleanup(i);
cc_mutex_unlock(&i->lock);
return 0;
}
command[0] = param;
command[1] = strchr(command[0], '|');
if (command[1] == 0) {
/*
* Remove command
*/
cc_mutex_lock(&i->lock);
while ((cmd = pbx_capi_find_command(i, command[0])) != 0) {
cc_verbose(2, 0, VERBOSE_PREFIX_4"%s: voicecommand:%s removed\n",
i->vname, cmd->command_name);
diva_q_remove(&i->channel_command_q, &cmd->link);
ast_free (cmd);
}
cc_mutex_unlock(&i->lock);
} else {
if ((command[1] - command[0]) < 2 || (command[1] - command[0]) >= sizeof(cmd->command_name) ||
strchr(pbx_capi_voicecommand_digits, command[1][1]) == 0) {
cc_log(LOG_WARNING, CC_MESSAGE_NAME" voicecommand requires an argument im format 'voicecommand[|key[|param1|param2|...]]'\n");
return -1;
}
key[0] = &command[1][1];
key[1] = strchr (key[0], '|');
length = 0;
if ((key[1] == 0 && strlen(key[0]) >= sizeof(cmd->channel_command_digits)) ||
(key[1] != 0 && ((key[1] - key[0]) == 0 || (key[1] - key[0]) >= sizeof(cmd->channel_command_digits) ||
key[1][1] == 0 || (length = strlen (&key[1][1])) >= sizeof(cmd->command_parameters)))) {
cc_log(LOG_WARNING, CC_MESSAGE_NAME
" voicecommand requires an argument im format 'voicecommand[|key[|param1|param2|...]]'\n");
return -1;
}
if (key[1] == 0) {
key[1] = key[0] + strlen(key[0]);
length = 0;
}
{
const char* p = key[0];
for (p = key[0]; p < key[1]; p++) {
if (strchr(pbx_capi_voicecommand_digits, *p) == 0) {
cc_log(LOG_WARNING, CC_MESSAGE_NAME
" voicecommand key can use only '%s'\n", pbx_capi_voicecommand_digits);
return -1;
}
}
}
cmd = ast_malloc(sizeof(*cmd));
if (cmd == NULL) {
cc_log(LOG_WARNING, CC_MESSAGE_NAME " can not allocate memory for voice command\n");
return -1;
}
memcpy (cmd->command_parameters, &key[1][1], length);
cmd->command_parameters[length] = 0;
length = command[1] - command[0];
memcpy (cmd->command_name, command[0], length);
cmd->command_name[length] = 0;
length = key[1] - key[0];
memcpy (cmd->channel_command_digits, key[0], length);
cmd->channel_command_digits[length] = 0;
cmd->length = length;
cmd->pbx_capi_command = pbx_capi_lockup_command_by_name(cmd->command_name);
if ( cmd->pbx_capi_command == 0) {
cmd->pbx_capi_command = pbx_capi_command_nop; /* accept unknown commands for compatibility reason */
}
cc_verbose(2, 0, VERBOSE_PREFIX_4 "%s: %svoicecommand:%s|%s|%s\n",
i->vname, (cmd->pbx_capi_command == pbx_capi_command_nop) ? "dummy " : "",
cmd->command_name, cmd->channel_command_digits, cmd->command_parameters);
{
pbx_capi_voice_command_t* present_cmd;
cc_mutex_lock(&i->lock);
if ((present_cmd = pbx_capi_find_command_by_key(i, cmd->command_name)) != 0) {
diva_q_remove(&i->channel_command_q, &present_cmd->link);
}
pbx_capi_voicecommand_insert_command(&i->channel_command_q, cmd);
cc_mutex_unlock(&i->lock);
if (present_cmd != 0) {
ast_free (present_cmd);
}
}
}
return 0;
}
int pbx_capi_voicecommand_transparency(struct ast_channel *c, char *param)
{
struct capi_pvt *i;
#ifdef CC_AST_HAS_VERSION_11_0
const struct ast_channel_tech *cur_tech = ast_channel_tech(c);
#else /* !defined(CC_AST_HAS_VERSION_11_0) */
const struct ast_channel_tech *cur_tech = c->tech;
#endif /* defined(CC_AST_HAS_VERSION_11_0) */
if (cur_tech == &capi_tech) {
i = CC_CHANNEL_PVT(c);
} else {
i = pbx_check_resource_plci(c);
}
if (i == 0) {
/*
Ignore command silently to ensure same context can be used to process
all types of calls or in case of fallback to NULL PLCI
*/
return 0;
}
if ((param == NULL) || (*param == 0)) {
cc_log(LOG_WARNING, "Parameter for voicecommand transparency missing.\n");
return -1;
}
if (ast_true(param)) {
i->command_pass_digits = 1;
} else if (ast_false(param)) {
i->command_pass_digits = 0;
} else {
cc_log(LOG_WARNING, "Wrong parameter for voicecommand transparency.\n");
return -1;
}
return 0;
}
int pbx_capi_voicecommand_cleanup(struct capi_pvt *i)
{
diva_entity_link_t* link;
while ((link = diva_q_get_head(&i->channel_command_q)) != NULL) {
diva_q_remove(&i->channel_command_q, link);
ast_free(link);
}
i->channel_command_digit = 0;
i->channel_command_timestamp = 0;
i->command_pass_digits = 0;
return 0;
}
static pbx_capi_voice_command_t* pbx_capi_find_command(struct capi_pvt *i, const char* name)
{
diva_entity_link_t* link;
for (link = diva_q_get_head (&i->channel_command_q); link != 0; link = diva_q_get_next(link)) {
if (strcmp(((pbx_capi_voice_command_t*)link)->command_name, name) == 0) {
return ((pbx_capi_voice_command_t*)link);
}
}
return 0;
}
static pbx_capi_voice_command_t* pbx_capi_find_command_by_key(struct capi_pvt *i, const char* key)
{
diva_entity_link_t* link;
for (link = diva_q_get_head (&i->channel_command_q); link != 0; link = diva_q_get_next(link)) {
if (strcmp (((pbx_capi_voice_command_t*)link)->channel_command_digits, key) == 0) {
return ((pbx_capi_voice_command_t*)link);
}
}
return 0;
}
/*
* Process received DTMF digit
*
* returs zero if digit should be processed as usually
* returns -1 if digit should be discarded
*/
int pbx_capi_voicecommand_process_digit(struct capi_pvt *i, struct ast_channel *owner, char digit)
{
struct ast_channel *c = (owner == 0) ? i->owner : owner;
pbx_capi_voice_command_t* cmd;
int info;
time_t t;
/*
Simple algorithm due to low amount of entries, moreover all sequences will be short, only 1 ... 2 digits
*/
if ((c == NULL) || (diva_q_get_head(&i->channel_command_q) == 0) ||
(strchr(pbx_capi_voicecommand_digits, digit) == 0)) {
i->channel_command_digit = 0;
return 0;
}
t = time(0);
if (((i->channel_command_digit != 0) && (difftime(t, i->channel_command_timestamp) > 2)) ||
(i->channel_command_digit >= (sizeof(i->channel_command_digits) - 1))) {
i->channel_command_digit = 0;
}
i->channel_command_timestamp = t;
i->channel_command_digits[i->channel_command_digit++] = digit;
i->channel_command_digits[i->channel_command_digit] = 0;
cmd = pbx_capi_voicecommand_find_digit_command(
&i->channel_command_q,
i->channel_command_digits,
i->channel_command_digit,
&info);
if (cmd != 0) {
char command_parameters_copy[sizeof( cmd->command_parameters)];
i->channel_command_digit = 0;
cc_verbose(2, 0, VERBOSE_PREFIX_4 "%s: call voicecommand:%s|%s|%s\n",
i->vname, cmd->command_name, cmd->channel_command_digits, cmd->command_parameters);
strcpy (command_parameters_copy, cmd->command_parameters);
info = ((*(cmd->pbx_capi_command))(c, command_parameters_copy));
cc_verbose(2, 0, VERBOSE_PREFIX_4 "%s: voicecommand:%s|%s|%s %s\n",
i->vname, cmd->command_name, cmd->channel_command_digits, cmd->command_parameters, info == 0 ? "OK" : "ERROR");
} else if (info == 0) {
i->channel_command_digit = 0;
return 0;
}
return ((i->command_pass_digits != 0) ? 0 : -1);
}
static pbx_capi_voice_command_t* pbx_capi_voicecommand_find_digit_command(
diva_entity_queue_t* q,
const char* digits,
int length,
int* info)
{
diva_entity_link_t* link;
for (*info = 0, link = diva_q_get_head(q);
link != 0 && length <= ((pbx_capi_voice_command_t*)link)->length;
link = diva_q_get_next (link)) {
pbx_capi_voice_command_t* cmd = (pbx_capi_voice_command_t*)link;
if (memcmp(digits, cmd->channel_command_digits, length) == 0) {
*info = 1;
if (length == cmd->length) {
return cmd;
}
}
}
return 0;
}
static int pbx_capi_command_nop(struct ast_channel *c, char *param)
{
return 0;
}
static void pbx_capi_voicecommand_insert_command(diva_entity_queue_t* q, pbx_capi_voice_command_t* cmd)
{
diva_entity_link_t* link;
for (link = diva_q_get_head (q); link != 0; link = diva_q_get_next (link)) {
if (((pbx_capi_voice_command_t*)link)->length <= cmd->length) {
diva_q_insert_before (q, link, &cmd->link);
return;
}
}
diva_q_add_tail(q, &cmd->link);
}
/*
* vim:ts=2
*/