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event_list.c
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event_list.c
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/*
* Copyright (C) 2006 Voice Sistem S.R.L.
*
* This file is part of Kamailio, a free SIP server.
*
* Kamailio 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
*
* Kamailio 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
*
*/
/*!
* \file
* \brief Kamailio presence module :: Events
* \ingroup presence
*/
#include <stdlib.h>
#include<stdio.h>
#include <string.h>
#include "../../core/str.h"
#include "../../core/dprint.h"
#include "../../core/parser/parse_event.h"
#include "../../core/mem/shm_mem.h"
#include "../../core/mem/mem.h"
#include "event_list.h"
#include "hash.h"
#define MAX_EVNAME_SIZE 20
int search_event_params(event_t* ev, event_t* searched_ev);
event_t* shm_copy_event(event_t* e)
{
event_t* ev= NULL;
param_t* p1, *p2;
int size;
ev= (event_t*)shm_malloc(sizeof(event_t));
if(ev== NULL)
{
ERR_MEM(SHARE_MEM);
}
memset(ev, 0, sizeof(event_t));
ev->name.s= (char*)shm_malloc(e->name.len* sizeof(char));
if(ev->name.s== NULL)
{
ERR_MEM(SHARE_MEM);
}
memcpy(ev->name.s, e->name.s, e->name.len);
ev->name.len= e->name.len;
p1= e->params.list;
while(p1)
{
size= sizeof(param_t)+ (p1->name.len+ p1->body.len)* sizeof(char);
p2= (param_t*)shm_malloc(size);
if(p2== NULL)
{
ERR_MEM(SHARE_MEM);
}
memset(p2, 0, size);
size= sizeof(param_t);
CONT_COPY(p2, p2->name, p1->name);
if(p1->body.s && p1->body.len)
CONT_COPY(p2, p2->body, p1->body);
p2->next= ev->params.list;
ev->params.list= p2;
/* Update parameter hooks in the shmmem copy, this is needed so that
* we can test for the presence of the sla parameter even in the
* shared copy of the event */
if (e->params.hooks.event_dialog.call_id == p1)
ev->params.hooks.event_dialog.call_id = p2;
if (e->params.hooks.event_dialog.from_tag == p1)
ev->params.hooks.event_dialog.from_tag = p2;
if (e->params.hooks.event_dialog.to_tag == p1)
ev->params.hooks.event_dialog.to_tag = p2;
if (e->params.hooks.event_dialog.include_session_description == p1)
ev->params.hooks.event_dialog.include_session_description = p2;
if (e->params.hooks.event_dialog.sla == p1)
ev->params.hooks.event_dialog.sla = p2;
p1= p1->next;
}
ev->type= e->type;
return ev;
error:
shm_free_event(ev);
return NULL;
}
void shm_free_event(event_t* ev)
{
if(ev== NULL)
return;
if(ev->name.s)
shm_free(ev->name.s);
free_event_params(ev->params.list, SHM_MEM_TYPE);
shm_free(ev);
}
int add_event(pres_ev_t* event)
{
pres_ev_t* ev= NULL;
event_t parsed_event;
str wipeer_name;
char* sep;
char buf[50];
int not_in_list= 0;
memset(&parsed_event, 0, sizeof(event_t));
if(event->name.s== NULL || event->name.len== 0)
{
LM_ERR("NULL event name\n");
return -1;
}
if(event->content_type.s== NULL || event->content_type.len== 0)
{
LM_ERR("NULL content_type param\n");
return -1;
}
ev= contains_event(&event->name, &parsed_event);
if(ev== NULL)
{
not_in_list= 1;
ev= (pres_ev_t*)shm_malloc(sizeof(pres_ev_t));
if(ev== NULL)
{
free_event_params(parsed_event.params.list, PKG_MEM_TYPE);
parsed_event.params.list = NULL;
ERR_MEM(SHARE_MEM);
}
memset(ev, 0, sizeof(pres_ev_t));
ev->name.s= (char*)shm_malloc(event->name.len* sizeof(char));
if(ev->name.s== NULL)
{
ERR_MEM(SHARE_MEM);
}
memcpy(ev->name.s, event->name.s, event->name.len);
ev->name.len= event->name.len;
ev->evp= shm_copy_event(&parsed_event);
if(ev->evp== NULL)
{
LM_ERR("copying event_t structure\n");
goto error;
}
}
else
{
if(ev->content_type.s)
{
LM_DBG("Event already registered\n");
goto done;
}
}
ev->content_type.s=
(char*)shm_malloc(event->content_type.len* sizeof(char)) ;
if(ev->content_type.s== NULL)
{
ERR_MEM(SHARE_MEM);
}
ev->content_type.len= event->content_type.len;
memcpy(ev->content_type.s, event->content_type.s, event->content_type.len);
for(sep=parsed_event.name.s; sep<parsed_event.name.s+parsed_event.name.len;
sep++)
if(*sep=='.') break;
if(sep>=parsed_event.name.s+parsed_event.name.len) sep=0;
if(sep && strncmp(sep+1, "winfo", 5)== 0)
{
ev->type= WINFO_TYPE;
wipeer_name.s= parsed_event.name.s;
wipeer_name.len= sep - parsed_event.name.s;
ev->wipeer= contains_event(&wipeer_name, NULL);
if (ev->wipeer) {
LM_DBG("Found wipeer event [%.*s] for event [%.*s]\n",
wipeer_name.len,wipeer_name.s,
parsed_event.name.len,parsed_event.name.s);
}
}
else
{
ev->type= PUBL_TYPE;
if (parsed_event.name.len + 6 > 50) {
LM_ERR("buffer too small\n");
goto error;
}
wipeer_name.s= buf;
memcpy(wipeer_name.s, parsed_event.name.s, parsed_event.name.len);
wipeer_name.len= parsed_event.name.len;
memcpy(wipeer_name.s+ wipeer_name.len, ".winfo", 6);
wipeer_name.len+= 6;
ev->wipeer= contains_event(&wipeer_name, NULL);
if (ev->wipeer) {
LM_DBG("Found wipeer event [%.*s] for event [%.*s]\n",
wipeer_name.len,wipeer_name.s,
parsed_event.name.len,parsed_event.name.s);
}
}
if(ev->wipeer)
ev->wipeer->wipeer= ev;
if(event->req_auth &&
( event->get_auth_status==0 ||event->get_rules_doc== 0))
{
LM_ERR("bad event structure\n");
goto error;
}
ev->req_auth= event->req_auth;
ev->agg_nbody= event->agg_nbody;
ev->apply_auth_nbody= event->apply_auth_nbody;
ev->get_auth_status= event->get_auth_status;
ev->get_rules_doc= event->get_rules_doc;
ev->get_pidf_doc= event->get_pidf_doc;
ev->evs_publ_handl= event->evs_publ_handl;
ev->evs_subs_handl= event->evs_subs_handl;
ev->etag_not_new= event->etag_not_new;
ev->aux_body_processing= event->aux_body_processing;
ev->aux_free_body= event->aux_free_body;
ev->free_body= event->free_body;
ev->default_expires= event->default_expires;
if(not_in_list)
{
ev->next= EvList->events;
EvList->events= ev;
}
EvList->ev_count++;
LM_DBG("successfully added event: %.*s - len= %d\n",ev->name.len,
ev->name.s, ev->name.len);
done:
free_event_params(parsed_event.params.list, PKG_MEM_TYPE);
return 0;
error:
free_event_params(parsed_event.params.list, PKG_MEM_TYPE);
if(ev && not_in_list)
{
free_pres_event(ev);
}
return -1;
}
void free_pres_event(pres_ev_t* ev)
{
if(ev== NULL)
return;
if(ev->name.s)
shm_free(ev->name.s);
if(ev->content_type.s)
shm_free(ev->content_type.s);
if(ev->wipeer)
ev->wipeer->wipeer = 0;
shm_free_event(ev->evp);
shm_free(ev);
}
evlist_t* init_evlist(void)
{
evlist_t* list= NULL;
list= (evlist_t*)shm_malloc(sizeof(evlist_t));
if(list== NULL)
{
LM_ERR("no more share memory\n");
return NULL;
}
list->ev_count= 0;
list->events= NULL;
return list;
}
pres_ev_t* contains_event(str* sname, event_t* parsed_event)
{
event_t event;
event_t *pe;
pres_ev_t* e;
pe = (parsed_event)?parsed_event:&event;
memset(pe, 0, sizeof(event_t));
if(event_parser(sname->s, sname->len, pe)< 0)
{
LM_ERR("parsing event\n");
return NULL;
}
e= search_event(pe);
if(parsed_event==0)
{
free_event_params(pe->params.list, PKG_MEM_TYPE);
pe->params.list = NULL;
}
return e;
}
void free_event_params(param_t* params, int mem_type)
{
param_t* t1, *t2;
t2= t1= params;
while(t1)
{
t2= t1->next;
if(mem_type == SHM_MEM_TYPE)
shm_free(t1);
else
pkg_free(t1);
t1= t2;
}
}
pres_ev_t* search_event(event_t* event)
{
pres_ev_t* pres_ev;
pres_ev= EvList->events;
LM_DBG("start event= [%.*s/%d]\n", event->name.len, event->name.s,
event->type);
while(pres_ev)
{
if((pres_ev->evp->type== event->type && event->type!=EVENT_OTHER)
|| (pres_ev->evp->name.len== event->name.len &&
strncasecmp(pres_ev->evp->name.s,event->name.s,
pres_ev->evp->name.len)== 0))
{
if(event->params.list== NULL && pres_ev->evp->params.list== NULL)
{
return pres_ev;
}
/* search all parameters in event in ev */
if(search_event_params(event, pres_ev->evp)< 0)
goto cont;
/* search all parameters in ev in event */
if(search_event_params(pres_ev->evp, event)< 0)
goto cont;
return pres_ev;
}
cont: pres_ev= pres_ev->next;
}
return NULL;
}
int search_event_params(event_t* ev, event_t* searched_ev)
{
param_t* ps, *p;
int found;
ps= ev->params.list;
while(ps)
{
p= searched_ev->params.list;
found= 0;
while(p)
{
if(p->name.len==ps->name.len &&
strncmp(p->name.s, ps->name.s, ps->name.len)==0) {
if(p->body.s==0 && ps->body.s==0) {
found= 1;
break;
}
if(p->body.s!=0 && ps->body.s!=0 && p->body.len==ps->body.len
&& (strncmp(p->body.s, ps->body.s, ps->body.len)==0)) {
found= 1;
break;
}
}
p= p->next;
}
if(found== 0)
return -1;
ps= ps->next;
}
return 1;
}
int get_event_list(str** ev_list)
{
pres_ev_t* ev= EvList->events;
int i;
str* list;
*ev_list= NULL;
if(EvList->ev_count== 0)
return 0;
list= (str*)pkg_malloc(sizeof(str));
if(list== NULL)
{
LM_ERR("No more memory\n");
return -1;
}
memset(list, 0, sizeof(str));
list->s= (char*)pkg_malloc(EvList->ev_count* MAX_EVNAME_SIZE);
if(list->s== NULL)
{
LM_ERR("No more memory\n");
pkg_free(list);
return -1;
}
list->s[0]= '\0';
for(i= 0; i< EvList->ev_count; i++)
{
if(i> 0)
{
memcpy(list->s+ list->len, ", ", 2);
list->len+= 2;
}
memcpy(list->s+ list->len, ev->name.s, ev->name.len );
list->len+= ev->name.len ;
ev= ev->next;
}
*ev_list= list;
return 0;
}
void destroy_evlist(void)
{
pres_ev_t* e1, *e2;
if (EvList) {
e1= EvList->events;
while(e1) {
e2= e1->next;
free_pres_event(e1);
e1= e2;
}
shm_free(EvList);
}
}