/
emergency_methods.c
2106 lines (1743 loc) · 53.6 KB
/
emergency_methods.c
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/*
* emergency module - basic support for emergency calls
*
* Copyright (C) 2014-2015 Robison Tesini & Evandro Villaron
*
* This file is part of opensips, a free SIP server.
*
* opensips 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 of the License, or
* (at your option) any later version
*
* opensips is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* History:
* --------
* 2014-10-14 initial version (Villaron/Tesini)
* 2015-03-21 implementing subscriber function (Villaron/Tesini)
* 2015-04-29 implementing notifier function (Villaron/Tesini)
* 2015-05-20 change callcell identity
* 2015-06-08 change from list to hash (Villaron/Tesini)
* 2015-08-05 code review (Villaron/Tesini)
* 2015-09-07 final test cases (Villaron/Tesini)
*/
#include <stdio.h>
#include <stdlib.h>
#include <curl/curl.h>
#include "emergency_methods.h"
#define TABLE_ROUTING_VERSION 1
#define TABLE_REPORT_VERSION 1
#define TABLE_PROVIDER_VERSION 1
/*
* Module initialization and cleanup
*/
static int mod_init(void);
static int child_init(int);
static void mod_destroy(void);
struct dlg_binds dlgb;
struct rr_binds rr_api;
str callid_aux;
/*
* Exported functions
*/
static cmd_export_t cmds[] = {
{"emergency_call", (cmd_function) emergency_call, {{0, 0, 0}},
REQUEST_ROUTE | BRANCH_ROUTE },
{"failure", (cmd_function) failure, {{0, 0, 0}},
FAILURE_ROUTE | ONREPLY_ROUTE },
{ 0, 0, {{0, 0, 0}}, 0}
};
/*
* Exported parameters
*/
static param_export_t params[] = {
{ "emergency_codes", STR_PARAM | USE_FUNC_PARAM, (void *) &set_codes},
{ "timer_interval", INT_PARAM, &timer_interval},
{ "db_url", STR_PARAM, &db_url.s},
{ "db_table_routing", STR_PARAM, &table_name},
{ "db_table_report", STR_PARAM, &table_report},
{ "db_table_provider", STR_PARAM, &table_provider},
{ "url_vpc", STR_PARAM, &url_vpc},
{ "contingency_hostname", STR_PARAM, &contingency_hostname},
{ "emergency_call_server", STR_PARAM, &call_server_hostname},
{ "proxy_role", INT_PARAM, &proxy_role},
{ "callorigin", STR_PARAM, &call_origin},
{ "call_htable_size", INT_PARAM, &emetable_size},
{ "subs_htable_size", INT_PARAM, &substable_size},
{ 0, 0, 0}
};
/*
* Module parameter variables
*/
static dep_export_t deps = {
{ /* OpenSIPS module dependencies */
{ MOD_TYPE_SQLDB, NULL, DEP_ABORT },
{ MOD_TYPE_NULL, NULL, 0 },
},
{ /* modparam dependencies */
{ NULL, NULL },
},
};
/*
* Module parameter variables
*/
struct module_exports exports = {
"emergency",
MOD_TYPE_DEFAULT,/* class of this module */
MODULE_VERSION, /* module version */
DEFAULT_DLFLAGS, /* dlopen flags */
0, /* load function */
&deps, /* OpenSIPS module dependencies */
0, /* OpenSIPS dependencies function */
cmds, /* Exported functions */
NULL, /* Exported async functions */
params, /* Exported parameters */
0, /* exported statistics */
0, /* exported MI functions */
0, /* exported pseudo-variables */
0, /* exported transformations */
0, /* extra processes */
mod_init, /* module initialization function */
0, /* response function*/
mod_destroy,
child_init,/* per-child init function */
0 /* reload confirm function */
};
/*
* Polling Inicialization Functions
*/
/* extracts the code and the description of the parameter emergency_code
* and stores these values in new_code linked list
*/
static int set_codes(unsigned int type, void *val) {
char *code, *description, *p;
int code_len, description_len, len;
struct code_number *new_code;
code = (char *) val;
len = strlen(code);
p = memchr(code, CODE_DELIM, len);
if (!p) {
LM_ERR("Invalid code - delimiter not found\n");
return -1;
}
/* separates the code and the description using the delimiter CODE_DELIM ("-") */
code_len = p - code;
description = ++p;
description_len = len - code_len - 1;
new_code = pkg_malloc(sizeof (struct code_number));
if (!new_code) {
LM_ERR("No more pkg memory\n");
return -1;
}
LM_DBG(" --- CODE -----> %.*s\n", code_len, code);
LM_DBG(" --- DESC -----> %.*s\n", description_len, description);
new_code->code.s = code;
new_code->code.len = code_len;
new_code->description.s = description;
new_code->description.len = description_len;
if (!codes)
codes = new_code;
else {
new_code->next = codes;
codes = new_code;
}
return 0;
}
void destroy_codes(struct code_number *codes){
struct code_number *c;
while(codes){
c= codes;
codes= codes->next;
pkg_free(c);
}
}
/*
* This function is responsible for :
* - load api from modules dialog and rr
* - open database connection and test the version of the tables in the database
* - initialize polling routing timer
* - initialize the module linked lists db_esrn_domain and calls_eme
* - initialize lock: ref_lock
*/
static int mod_init(void) {
LM_DBG("Initializing module\n");
// checks for mandatory fields
mandatory_parm = shm_malloc(2);
mandatory_parm[0] = '1';
mandatory_parm[1] = 0;
inicialized = shm_malloc(2);
inicialized[0] = '0';
inicialized[1] = 0;
LM_DBG(" ---fill parameters not config with blank_space \n");
if (fill_blank_space() == -1)
return -1;
if ( load_dlg_api( &dlgb ) != 0 ) {
LM_ERR("failed to load DLG api\n");
return -1;
}
if (load_tm_api(&eme_tm)!=0) {
LM_ERR( "can't load TM API\n");
return -1;
}
if (load_rr_api(&rr_api) != 0) {
LM_ERR("failed to load rr API\n");
return -1;
}
empty = shm_malloc(sizeof (char));
memset(empty, '\0', 1);
if(call_origin == NULL)
call_origin = empty;
if (db_url.s) {
db_url.len = strlen(db_url.s);
LM_DBG("We have db_url = %.*s\n", db_url.len, db_url.s);
/* Find a database module */
if (db_bind_mod(&db_url, &db_funcs) < 0) {
LM_ERR("Unable to bind to a database driver\n");
return -1;
}
/* open a test connection */
if ((db_con = db_funcs.init(&db_url)) == 0) {
LM_ERR("cannot init connection to DB\n");
return -1;
}
if (!DB_CAPABILITY(db_funcs, DB_CAP_ALL)) {
LM_ERR("database modules does not provide all functions needed by module\n");
return -1;
}
if (db_check_table_version(&db_funcs, db_con, &table_name, TABLE_ROUTING_VERSION) < 0) {
LM_ERR("error during routing table version check.\n");
return -1;
}
if (db_check_table_version(&db_funcs, db_con, &table_report, TABLE_REPORT_VERSION) < 0) {
LM_ERR("error during report table version check.\n");
return -1;
}
if (db_check_table_version(&db_funcs, db_con, &table_provider, TABLE_PROVIDER_VERSION) < 0) {
LM_ERR("error during provider table version check.\n");
return -1;
}
db_funcs.close(db_con);
db_con = 0;
}
db_table = (str *)shm_malloc(sizeof (str));
if (!db_table) {
LM_ERR("no more memory\n");
return -1;
}
db_table = &table_report;
db_esrn_esgwri = shm_malloc(sizeof (struct esrn_routing *));
if (!db_esrn_esgwri) {
LM_ERR("no more memory\n");
return -1;
}
*db_esrn_esgwri = NULL;
db_service_provider = shm_malloc(sizeof (struct service_provider *));
if (!db_service_provider) {
LM_ERR("no more memory\n");
return -1;
}
*db_service_provider = NULL;
if (register_timer("emer_rout_table", routing_timer, 0, timer_interval, 0) < 0) {
LM_ERR("failed to register timer \n");
return -1;
}
if ((ref_lock = lock_init_rw()) == NULL) {
LM_ERR("failed to init lock\n");
return -1;
}
if(emetable_size< 1)
emet_size= 512;
else
emet_size= 1<< emetable_size;
call_htable= new_ehtable(emet_size);
if(call_htable== NULL)
{
LM_ERR(" initializing emergency_call hash table\n");
return -1;
}
if(substable_size< 1)
subst_size= 512;
else
subst_size= 1<< substable_size;
subs_htable= new_shtable(subst_size);
if(subs_htable== NULL)
{
LM_ERR(" initializing emergency_call hash table\n");
return -1;
}
/* data */
curl_global_init(CURL_GLOBAL_ALL);
LM_DBG("EMERGENCY Module initialized!\n");
return 0;
}
/* this function is responsible for:
* - open database connection
* - initialize polling routing timer
*/
static int child_init(int rank) {
LM_DBG("Initializing child\n");
if (db_url.s && rank>PROC_MAIN) {
/* open a test connection */
if ((db_con = db_funcs.init(&db_url)) == 0) {
LM_ERR("cannot init connection to DB\n");
return -1;
}
if (strcmp(inicialized, "0") == 0){
inicialized[0] = '1';
inicialized[1] = 0;
routing_timer(0, 0);
}
}
return 0;
}
/*
* - close database connection
* - terminate lock (ref_lock)
*/
static void mod_destroy(void) {
curl_global_cleanup();
if (db_con != NULL && db_funcs.close != 0)
db_funcs.close(db_con);
if(ref_lock){
lock_destroy_rw( ref_lock );
ref_lock = NULL;
}
if(call_htable)
destroy_ehtable(call_htable, emet_size);
if(subs_htable)
destroy_shtable(subs_htable, subst_size);
shm_free(inicialized);
shm_free(db_service_provider);
shm_free(db_esrn_esgwri);
shm_free(empty);
destroy_codes(codes);
}
/*
* - copying data from the routing table to the list db_esrn_domain (performance improvement)
*/
void routing_timer(unsigned int ticks, void *attr) {
if (get_db_routing(table_name, ref_lock ) != 1)
LM_ERR("ERROR IN GET ROUTING OF DB \n");
if (get_db_provider(table_provider, ref_lock ) != 1)
LM_ERR("ERROR IN GET SERVICE PROVIDER OF DB \n");
libera_esqk();
free_subs();
}
/*
* - verifying the expiration for packet loss ( timing values are different for ACK and BYE)
* - if there is an expiration the module sends a POST informing the VPC to exclude the number
* the key ESQK is retreived from the list calls_eme
*/
static void libera_esqk(void) {
time_t rawtime;
struct tm * timeinfo;
int resp = 1;
char* response;
char* esct_callid;
char* xml;
struct node* current;
NODE *previous = NULL;
NODE *free_cell;
int i;
for(i= 0; i< emet_size; i++){
lock_get(&call_htable[i].lock);
previous= call_htable[i].entries;
current= previous->next;
while (current) {
current->esct->timeout --;
NODE* next = current->next;
LM_DBG("TIMEOUT:%d\n", current->esct->timeout);
if (current->esct->timeout <= 0 ){
LM_DBG("time fires\n");
free_cell = current;
previous->next = next;
LM_DBG("********************************************CALLID FREE%s\n", free_cell->esct->callid);
if ((proxy_role == 0) || (proxy_role == 1) ||(proxy_role == 4)){
//sends ESCT only if VPC provided key ESQK
if (strlen(free_cell->esct->esqk) > 0){
LM_DBG(" --- SEND ESQK=%s \n \n",free_cell->esct->esqk);
//send esctRequest to the VPC
time(&rawtime);
timeinfo = localtime(&rawtime);
strftime(free_cell->esct->datetimestamp, MAX_TIME_SIZE, "%Y-%m-%dT%H:%M:%S%Z", timeinfo);
xml = buildXmlFromModel(free_cell->esct);
resp = post(url_vpc, xml, &response);
if (resp == -1) {
LM_ERR(" --- PROBLEM OF THE BYE POST\n \n");
}
esct_callid = parse_xml_esct(response);
if (esct_callid== NULL) {
LM_ERR(" --- esctAck invalid format or without mandatory field \n \n");
} else {
if (strcmp(esct_callid, free_cell->esct->callid)){
LM_ERR(" --- callid in esctAck different from asctRequest \n \n");
}
LM_DBG(" *** esctACK OK\n");
if(esct_callid)
pkg_free(esct_callid);
}
pkg_free(response);
pkg_free(xml);
}
}
shm_free(free_cell->esct->esgwri);
shm_free(current);
}else{
previous = current;
}
current = next;
}
lock_release(&call_htable[i].lock);
}
}
/*
* - verifying the expiration for subscribe
* - free subscriber cell
*/
static void free_subs(void) {
time_t rawtime;
struct sm_subscriber* current;
struct sm_subscriber* previous = NULL;
struct sm_subscriber* free_cell;
struct sm_subscriber* next;
int time_C;
int i;
time(&rawtime);
time_C = (int)rawtime;
LM_DBG("TIME : %d \n", (int)rawtime );
for(i= 0; i< subst_size; i++){
lock_get(&subs_htable[i].lock);
previous= subs_htable[i].entries;
current= previous->next;
while (current) {
next = current->next;
LM_DBG("timeout %d\n", current->timeout);
if (current->timeout <= time_C ){
LM_DBG("time fires %d\n", current->timeout);
free_cell = current;
previous->next = next;
shm_free(free_cell);
}else{
previous = current;
}
current = next;
}
lock_release(&subs_htable[i].lock);
}
}
/*
* Callback Functions
*/
/*
* - treats the request within the dialog forwarding to the INVITE that first created the dialog
* - if the request is a BYE treats the call ending functions
*/
void indialog_ua(struct dlg_cell* dlg, int type, struct dlg_cb_params * params){
struct sip_msg *msg = params->msg;
int dir = params->direction;
int resp;
UNUSED(resp);
LM_DBG(" New sequential request received:%d !! \n",dir);
LM_DBG(" New sequential request method:%.*s \n",msg->first_line.u.request.method.len,msg->first_line.u.request.method.s);
if (memcmp(msg->first_line.u.request.method.s,"BYE", msg->first_line.u.request.method.len) == 0) {
LM_DBG(" --- TREAT BYE ----- \n \n");
resp = bye(msg,dir);
LM_DBG(" ---TREATMENT DIALOG BYE:%d", resp);
}else{
if (dir == 1){
LM_DBG(" --- TREAT DOWNSTREAM ----- \n \n");
resp = routing_ack(msg);
LM_DBG(" ---TREATMENT DIALOG ACK:%d", resp);
}
}
}
void reply_in_redirect( struct cell* t, int type, struct tmcb_params *params){
char *contact_esgwri = NULL;
char *contact_lro = NULL;
struct sip_msg *reply = params->rpl;
struct sip_msg *msg_retran = params->req;
struct to_body *pfrom = NULL;
unsigned int hash_code;
int resp = 0;
int resp_esqk = 0;
if (extract_contact_hdrs(reply, &contact_esgwri, &contact_lro) == -1){
return;
}
if (msg_retran->from->parsed == NULL){
if ( parse_from_header( reply )<0 ){
LM_ERR("300 response without From header\n");
goto error_01;
}
}
pfrom = get_from(msg_retran);
LM_DBG("PFROM_TAG: %.*sxxx \n ", pfrom->tag_value.len, pfrom->tag_value.s );
if( pfrom->tag_value.s ==NULL || pfrom->tag_value.len == 0){
LM_ERR("300 response without from_tag value \n");
goto error_01;
}
if( msg_retran->callid==NULL || msg_retran->callid->body.s==NULL){
LM_ERR("reply without callid header\n");
goto error_01;
}
call_cell = pkg_malloc(sizeof (ESCT));
if (call_cell == NULL) {
LM_ERR("--------------------------------------------------no more shm memory\n");
return;
}
call_cell->callid = pkg_malloc(sizeof (char)* reply->callid->body.len + 1);
if (call_cell->callid == NULL) {
LM_ERR("--------------------------------------------------no more shm memory\n");
return;
}
memcpy(call_cell->callid, reply->callid->body.s, reply->callid->body.len);
call_cell->callid[reply->callid->body.len] = 0;
call_cell->eme_dlg_id = pkg_malloc(sizeof (struct dialog_set));
if (call_cell->eme_dlg_id == NULL) {
LM_ERR("--------------------------------------------------no more shm memory\n");
return;
}
call_cell->eme_dlg_id->local_tag = pkg_malloc(sizeof (char)* pfrom->tag_value.len+1);
if (call_cell->eme_dlg_id->local_tag == NULL) {
LM_ERR("--------------------------------------------------no more shm memory\n");
return;
}
memcpy(call_cell->eme_dlg_id->local_tag, pfrom->tag_value.s, pfrom->tag_value.len);
call_cell->eme_dlg_id->local_tag[pfrom->tag_value.len] = 0;
call_cell->eme_dlg_id->call_id = pkg_malloc(sizeof (char)*reply->callid->body.len+1);
if (call_cell->eme_dlg_id->call_id == NULL) {
LM_ERR("--------------------------------------------------no more shm memory\n");
return;
}
memcpy(call_cell->eme_dlg_id->call_id, reply->callid->body.s, reply->callid->body.len);
call_cell->eme_dlg_id->call_id[reply->callid->body.len] = 0;
call_cell->eme_dlg_id->rem_tag = "";
call_cell->esqk = empty;
call_cell->esgw = empty;
call_cell->lro = empty;
call_cell->ert_srid = empty;
call_cell->esgwri = empty;
call_cell->result = empty;
call_cell->datetimestamp = empty;
call_cell->ert_npa = 0;
call_cell->ert_resn = 0;
call_cell->disposition = empty;
call_cell->datetimestamp = empty;
call_cell->timeout = ACK_TIME;
call_cell->source = pkg_malloc(sizeof (NENA));
if (call_cell->source == NULL) {
LM_ERR("--------------------------------------------------no more shm memory\n");
return;
}
call_cell->source->organizationname = empty;
call_cell->source->hostname = empty;
call_cell->source->nenaid = empty;
call_cell->source->contact = empty;
call_cell->source->certuri = empty;
call_cell->vpc = pkg_malloc(sizeof (NENA));
if (call_cell->vpc == NULL) {
LM_ERR("--------------------------------------------------no more shm memory\n");
return;
}
call_cell->vpc->organizationname = empty;
call_cell->vpc->hostname = empty;
call_cell->vpc->nenaid = empty;
call_cell->vpc->contact = empty;
call_cell->vpc->certuri = empty;
if (contact_lro){
if(get_lro_in_contact(contact_lro, call_cell) == -1){
return;
}
}
if (contact_esgwri){
resp_esqk = get_esqk_in_contact(contact_esgwri, call_cell);
if(resp_esqk == -1){
return;
}else{
if(resp_esqk == 1){
resp = get_esgwri_ert_in_contact(contact_esgwri, call_cell);
if (resp == -1){
return;
}else{
if(resp == 0){
if(call_cell->lro == empty){
LM_ERR("don't exits esgwri/ert or lro to routing\n");
goto end;
}
}
}
}else{
LM_DBG("exits lro to routing %d\n", resp);
if(call_cell->lro == empty){
LM_ERR("don't exits esgwri/ert or lro to routing\n");
goto end;
}
}
}
}
hash_code= core_hash(&reply->callid->body, 0, emet_size);
LM_DBG("********************************************HASH_CODE%d\n", hash_code);
if(insert_ehtable(call_htable,hash_code,call_cell)< 0){
LM_ERR("inserting new record in subs_htable\n");
}
end:
free_call_cell(call_cell);
return;
error_01:
pkg_free(contact_esgwri);
pkg_free(contact_lro);
return;
}
/*
* Functions that the User can call from the config file
*/
/*
* - verify if the request is an emergency call
* - is it is an emergency forward the INVITE to the destiny determined by the VPC
*/
int emergency_call(struct sip_msg *msg) {
struct dlg_cell *dlg;
// verify if mandatory parameters were configurated in script
if ((proxy_role == 0|| proxy_role == 1|| proxy_role == 4) && (strcmp(mandatory_parm, "1") == 0)){
LM_ERR("source_hostname and sorce_nena_id are mandatory\n");
return -1;
}
// the emergency call treatment start with INVITE
if (memcmp(msg->first_line.u.request.method.s,"INVITE", msg->first_line.u.request.method.len) == 0) {
LM_DBG(" --- TREAT INVITE ----- \n \n");
if (is_emergency_call(msg)) {
LM_DBG(" --- IT IS AN EMERGECY ----- \n \n");
// It is, forward the INVITE
if(send_request_vpc(msg) == 1){
if (dlgb.create_dlg(msg,0)<1) {
LM_ERR("failed to create dialog\n");
return -1;
}
dlg = dlgb.get_dlg();
if (dlg==NULL) {
LM_CRIT("BUG: found after create dialog\n");
return -1;
}
if(dlgb.register_dlgcb(dlg, DLGCB_REQ_WITHIN|DLGCB_TERMINATED, indialog_ua ,0,0)!=0) {
LM_ERR("failed to register dialog callback\n");
return -1;
}
return 1;
}
}
}else{
if (memcmp(msg->first_line.u.request.method.s,"NOTIFY", msg->first_line.u.request.method.len) == 0){
if (proxy_role == 4) {
LM_DBG(" --- TREAT NOTIFY ----- \n \n");
if ( !treat_notify(msg)){
LM_ERR ("***** ERROR IN NOTIFY TREATMENT \n");
return -1;
}
return -1;
}
}
if (memcmp(msg->first_line.u.request.method.s,"SUBSCRIBE", msg->first_line.u.request.method.len) == 0){
if (proxy_role == 3) {
if ( !treat_subscribe(msg)){
LM_ERR ("***** ERROR IN SUBSCRIBE TREATMENT \n");
return -1;
}
return -1;
}
}
}
return -1;
}
/* treat the command FAILURE
* - treat contingency forwarding in the case of failure of the original
* - Forward the INVITE to a gateway with the contingency number lro from the field R-URI
*/
static int failure(struct sip_msg *msg) {
char* callidHeader;
ESCT* info_call;
char* new_to;
char* cbn_aux;
str cbn;
char* from_tag;
struct to_body *pfrom = NULL;
struct node* s;
unsigned int hash_code;
LM_DBG(" --- FAILURE treatment \n \n");
if (proxy_role == 2) {
LM_DBG(" ---role: call server scenario II \n");
return -1;
}
// get callid of the message
if ( parse_headers(msg,HDR_EOH_F, 0) == -1 ){
LM_ERR("error in parsing headers\n");
return -1;
}
if( msg->callid==NULL || msg->callid->body.s==NULL){
LM_ERR("msg without callid header\n");
return -1;
}
callidHeader = pkg_malloc(sizeof (char) * msg->callid->body.len + 1);
if (callidHeader == NULL) {
LM_ERR("no more pkg memory\n");
return -1 ;
}
memset(callidHeader, '\0', msg->callid->body.len + 1);
strncpy(callidHeader, msg->callid->body.s, msg->callid->body.len);
LM_DBG(" ---FAILURE treatment callid=%s", callidHeader);
if (msg->from->parsed == NULL){
if ( parse_from_header( msg )<0 ){
LM_ERR("subscribe without From header\n");
pkg_free(callidHeader);
return -1;
}
}
pfrom = get_from(msg);
LM_DBG("PFROM_TAG: %.*sxxx \n ", pfrom->tag_value.len, pfrom->tag_value.s );
if( pfrom->tag_value.s ==NULL || pfrom->tag_value.len == 0){
LM_ERR("INVITE without from_tag value \n");
pkg_free(callidHeader);
return -1;
}
from_tag = pkg_malloc(sizeof (char)* pfrom->tag_value.len + 1);
if (from_tag == NULL) {
LM_ERR("no more pkg memory\n");
return -1;
}
memset(from_tag, 0, pfrom->tag_value.len + 1);
strncpy(from_tag, pfrom->tag_value.s, pfrom->tag_value.len);
hash_code= core_hash(&msg->callid->body, 0, emet_size);
LM_DBG("********************************************HASH_CODE%d\n", hash_code);
// find the cell with the callid from the list calls_cell
s= search_ehtable(call_htable, callidHeader, from_tag, hash_code, 0);
if (s == NULL) {
LM_ERR(" ---FAILURE treatment did not find the CALLID\n");
goto error;
}
info_call = s->esct;
if (proxy_role == 3) {
if (strstr(info_call->disposition, "processes") != NULL) {
LM_DBG(" ---role: proxy routing \n");
cbn_aux = pkg_malloc(sizeof (char)* MAX_URI_SIZE);
if (cbn_aux == NULL) {
LM_ERR("no more pkg memory\n");
return -1 ;
}
memset(cbn_aux, 0, MAX_URI_SIZE);
found_CBN(msg, &cbn_aux);
cbn.s = cbn_aux;
cbn.len = strlen(cbn.s);
LM_DBG(" --- FOUND CBN%.*s \n \n", cbn.len, cbn.s);
if(strlen(info_call->esgwri) > 1){
LM_DBG ("FAILURE REPLY ESGWRI %s \n",info_call->esgwri);
if(new_uri_proxy(msg, info_call->esgwri) == -1){
LM_ERR(" ERROR IN NEW_URI_PROXY\n");
pkg_free(cbn_aux);
goto lro;
}
}else{
if ((strlen(info_call->ert_srid) > 1)&&(info_call->ert_resn != 0)&&(info_call->ert_npa != 0)){
LM_DBG ("CONTEUDO FAILURE REPLY SRID %s \n",info_call->ert_srid);
LM_DBG ("CONTEUDO FAILURE REPLY RESN %d \n",info_call->ert_resn);
LM_DBG ("CONTEUDO FAILURE REPLY NPA %d \n",info_call->ert_npa);
if(routing_by_ert( msg, info_call, 1) == -1){
pkg_free(cbn_aux);
goto lro;
}
}else{
pkg_free(cbn_aux);
goto lro;
}
}
if(add_headers(info_call->esqk, msg, cbn)==-1){
goto error;
}
info_call->timeout = ACK_TIME;
memcpy(info_call->disposition, "esgwri", strlen("esgwri"));
info_call->disposition[strlen("esgwri")] = 0;
goto end;
}
}
lro:
LM_DBG("treat lro \n");
// verfifica se o parametro contingency_hostname foi definido no script, caso contrario failure não sera tratado
if ( contingency_hostname == NULL) {
LM_ERR("contingency_hostname not defined\n");
goto error;
}
// verifica se a chamada tratada teve o numero de contingencia lro fornecido pelo VPC
// caso não tenha, não trata failure
if (info_call->lro == empty) {
LM_ERR(" ---treat FAILURE not found lro\n");
goto error;
}
//verify if there was an attempt to forward the INVITE to the contingency number
if (strstr(info_call->disposition, "lro") == NULL) {
LM_DBG("EH LRO -- LRO = %s HOST = %s ", info_call->lro, contingency_hostname);
int tamanho_new_to = strlen(info_call->lro) + strlen(contingency_hostname) + 17;
new_to = shm_malloc(sizeof (char)* tamanho_new_to);
sprintf(new_to, "sip:%s@%s;user=phone", info_call->lro, contingency_hostname);
if((info_call->esgwri)&&(strlen(info_call->esgwri) > 1))
shm_free (info_call->esgwri);
info_call->esgwri = new_to;
info_call->esgw = empty;
info_call->timeout = ACK_TIME;
memcpy(info_call->disposition, "lro", strlen("lro"));
info_call->disposition[strlen("lro")] = 0;
LM_DBG(" ---NEW DESTIN =%s", new_to);
if(new_uri_proxy(msg, new_to) == -1){
LM_ERR(" ---ERRO EM NEW_URI_PROXY\n");
goto error;
}
}else{
LM_DBG(" ---FAILURE JA TRANSMITIU LRO\n");
goto error;
}
end:
if(callidHeader)
pkg_free(callidHeader);
if(from_tag)
pkg_free(from_tag);
return 1;
error :
if(callidHeader)
pkg_free(callidHeader);