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evapi_mod.c
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evapi_mod.c
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/**
* Copyright (C) 2014 Daniel-Constantin Mierla (asipto.com)
*
* This file is part of Kamailio, a free SIP server.
*
* This file 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
*
*
* This file 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <ev.h>
#include "../../sr_module.h"
#include "../../dprint.h"
#include "../../ut.h"
#include "../../pt.h"
#include "../../pvar.h"
#include "../../mem/shm_mem.h"
#include "../../mod_fix.h"
#include "../../pvar.h"
#include "../../cfg/cfg_struct.h"
#include "../../lib/kcore/faked_msg.h"
#include "../../modules/tm/tm_load.h"
#include "evapi_dispatch.h"
MODULE_VERSION
static int _evapi_workers = 1;
static char *_evapi_bind_addr = "127.0.0.1";
static int _evapi_bind_port = 8448;
static char *_evapi_bind_param = NULL;
static int _evapi_netstring_format_param = 1;
static tm_api_t tmb;
static int mod_init(void);
static int child_init(int);
static void mod_destroy(void);
static int w_evapi_relay(sip_msg_t* msg, char* evdata, char* p2);
static int w_evapi_async_relay(sip_msg_t* msg, char* evdata, char* p2);
static int w_evapi_close(sip_msg_t* msg, char* p1, char* p2);
static int fixup_evapi_relay(void** param, int param_no);
static cmd_export_t cmds[]={
{"evapi_relay", (cmd_function)w_evapi_relay, 1, fixup_evapi_relay,
0, ANY_ROUTE},
{"evapi_async_relay", (cmd_function)w_evapi_async_relay, 1, fixup_evapi_relay,
0, REQUEST_ROUTE},
{"evapi_close", (cmd_function)w_evapi_close, 0, NULL,
0, ANY_ROUTE},
{"evapi_close", (cmd_function)w_evapi_close, 1, NULL,
0, ANY_ROUTE},
{0, 0, 0, 0, 0, 0}
};
static param_export_t params[]={
{"workers", INT_PARAM, &_evapi_workers},
{"bind_addr", PARAM_STRING, &_evapi_bind_param},
{"netstring_format", INT_PARAM, &_evapi_netstring_format_param},
{0, 0, 0}
};
static pv_export_t mod_pvs[] = {
{ {"evapi", (sizeof("evapi")-1)}, PVT_OTHER, pv_get_evapi,
pv_set_evapi, pv_parse_evapi_name, 0, 0, 0},
{ {0, 0}, 0, 0, 0, 0, 0, 0, 0 }
};
struct module_exports exports = {
"evapi",
DEFAULT_DLFLAGS, /* dlopen flags */
cmds,
params,
0,
0, /* exported MI functions */
mod_pvs, /* exported pseudo-variables */
0, /* extra processes */
mod_init, /* module initialization function */
0, /* response function */
mod_destroy, /* destroy function */
child_init /* per child init function */
};
/**
* init module function
*/
static int mod_init(void)
{
char *p;
/* init faked sip msg */
if(faked_msg_init()<0) {
LM_ERR("failed to init faked sip message\n");
return -1;
}
if(load_tm_api( &tmb ) < 0) {
LM_INFO("cannot load the TM module functions - async relay disabled\n");
memset(&tmb, 0, sizeof(tm_api_t));
}
if(_evapi_bind_param!=NULL) {
p = strchr(_evapi_bind_param, ':');
if(p!=NULL) {
*p++ = '\0';
_evapi_bind_port = (short)atoi(p);
if (_evapi_bind_port <= 0) {
LM_ERR("invalid port: %d\n", _evapi_bind_port);
return -1;
}
}
_evapi_bind_addr = _evapi_bind_param;
}
/* add space for one extra process */
register_procs(1 + _evapi_workers);
/* add child to update local config framework structures */
cfg_register_child(1 + _evapi_workers);
evapi_init_environment(_evapi_netstring_format_param);
return 0;
}
/**
* @brief Initialize async module children
*/
static int child_init(int rank)
{
int pid;
int i;
if (rank==PROC_INIT) {
if(evapi_init_notify_sockets()<0) {
LM_ERR("failed to initialize notify sockets\n");
return -1;
}
return 0;
}
if (rank!=PROC_MAIN) {
evapi_close_notify_sockets_parent();
return 0;
}
pid=fork_process(PROC_RPC, "EvAPI Dispatcher", 1);
if (pid<0)
return -1; /* error */
if(pid==0) {
/* child */
/* initialize the config framework */
if (cfg_child_init())
return -1;
/* main function for dispatcher */
evapi_close_notify_sockets_child();
if(evapi_run_dispatcher(_evapi_bind_addr, _evapi_bind_port)<0) {
LM_ERR("failed to initialize evapi dispatcher process\n");
return -1;
}
}
for(i=0; i<_evapi_workers; i++) {
pid=fork_process(PROC_RPC, "EvAPI Worker", 1);
if (pid<0)
return -1; /* error */
if(pid==0) {
/* child */
/* initialize the config framework */
if (cfg_child_init())
return -1;
/* main function for workers */
if(evapi_run_worker(i+1)<0) {
LM_ERR("failed to initialize worker process: %d\n", i);
return -1;
}
}
}
return 0;
}
/**
* destroy module function
*/
static void mod_destroy(void)
{
}
/**
*
*/
static int w_evapi_relay(sip_msg_t *msg, char *evdata, char *p2)
{
str sdata;
if(evdata==0) {
LM_ERR("invalid parameters\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)evdata, &sdata)!=0) {
LM_ERR("unable to get data\n");
return -1;
}
if(sdata.s==NULL || sdata.len == 0) {
LM_ERR("invalid data parameter\n");
return -1;
}
if(evapi_relay(&sdata)<0) {
LM_ERR("failed to relay event: %.*s\n", sdata.len, sdata.s);
return -1;
}
return 1;
}
/**
*
*/
static int w_evapi_async_relay(sip_msg_t *msg, char *evdata, char *p2)
{
str sdata;
unsigned int tindex;
unsigned int tlabel;
tm_cell_t *t = 0;
if(evdata==0) {
LM_ERR("invalid parameters\n");
return -1;
}
if(tmb.t_suspend==NULL) {
LM_ERR("evapi async relay is disabled - tm module not loaded\n");
return -1;
}
t = tmb.t_gett();
if (t==NULL || t==T_UNDEFINED)
{
if(tmb.t_newtran(msg)<0)
{
LM_ERR("cannot create the transaction\n");
return -1;
}
t = tmb.t_gett();
if (t==NULL || t==T_UNDEFINED)
{
LM_ERR("cannot lookup the transaction\n");
return -1;
}
}
if(tmb.t_suspend(msg, &tindex, &tlabel)<0)
{
LM_ERR("failed to suspend request processing\n");
return -1;
}
LM_DBG("transaction suspended [%u:%u]\n", tindex, tlabel);
if(fixup_get_svalue(msg, (gparam_t*)evdata, &sdata)!=0) {
LM_ERR("unable to get data\n");
return -1;
}
if(sdata.s==NULL || sdata.len == 0) {
LM_ERR("invalid data parameter\n");
return -1;
}
if(evapi_relay(&sdata)<0) {
LM_ERR("failed to relay event: %.*s\n", sdata.len, sdata.s);
return -2;
}
return 1;
}
/**
*
*/
static int fixup_evapi_relay(void** param, int param_no)
{
return fixup_spve_null(param, param_no);
}
/**
*
*/
static int w_evapi_close(sip_msg_t* msg, char* p1, char* p2)
{
int ret;
ret = evapi_cfg_close(msg);
if(ret>=0)
return ret+1;
return ret;
}