/
dlg_hash.c
1803 lines (1514 loc) · 46.6 KB
/
dlg_hash.c
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/*
* Copyright (C) 2006-2009 Voice System SRL
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* History:
* --------
* 2006-04-14 initial version (bogdan)
* 2007-03-06 syncronized state machine added for dialog state. New tranzition
* design based on events; removed num_1xx and num_2xx (bogdan)
* 2007-04-30 added dialog matching without DID (dialog ID), but based only
* on RFC3261 elements - based on an original patch submitted
* by Michel Bensoussan <michel@extricom.com> (bogdan)
* 2007-07-06 additional information stored in order to save it in the db:
* cseq, route_set, contact and sock_info for both caller and
* callee (ancuta)
* 2007-07-10 Optimized dlg_match_mode 2 (DID_NONE), it now employs a proper
* hash table lookup and isn't dependant on the is_direction
* function (which requires an RR param like dlg_match_mode 0
* anyways.. ;) ; based on a patch from
* Tavis Paquette <tavis@galaxytelecom.net>
* and Peter Baer <pbaer@galaxytelecom.net> (bogdan)
* 2008-04-17 added new type of callback to be triggered right before the
* dialog is destroyed (deleted from memory) (bogdan)
* 2008-04-17 added new dialog flag to avoid state tranzitions from DELETED to
* CONFIRMED_NA due delayed "200 OK" (bogdan)
* 2009-09-09 support for early dialogs added; proper handling of cseq
* while PRACK is used (bogdan)
*/
#include <stdlib.h>
#include <string.h>
#include "../../dprint.h"
#include "../../ut.h"
#include "../../hash_func.h"
#include "../../mi/mi.h"
#include "../../route.h"
#include "../../md5utils.h"
#include "../../parser/parse_to.h"
#include "../../parser/contact/parse_contact.h"
#include "../tm/tm_load.h"
#include "../../script_cb.h"
#include "dlg_hash.h"
#include "dlg_profile.h"
#include "dlg_replication.h"
#include "dlg_req_within.h"
#include "dlg_db_handler.h"
#include "../../evi/evi_params.h"
#include "../../evi/evi_modules.h"
#define MAX_LDG_LOCKS 2048
#define MIN_LDG_LOCKS 2
/* useful for dialog ref debugging, once -DDBG_DIALOG is enabled */
struct struct_hist_list *dlg_hist;
struct dlg_table *d_table = NULL;
int ctx_dlg_idx = 0;
static inline void raise_state_changed_event(struct dlg_cell *dlg,
unsigned int ostate, unsigned int nstate);
static str ei_st_ch_name = str_init("E_DLG_STATE_CHANGED");
static evi_params_p event_params;
static str ei_h_entry = str_init("hash_entry");
static str ei_h_id = str_init("hash_id");
static str ei_c_id = str_init("callid");
static str ei_from_tag = str_init("from_tag");
static str ei_to_tag = str_init("to_tag");
static str ei_old_state = str_init("old_state");
static str ei_new_state = str_init("new_state");
static event_id_t ei_st_ch_id = EVI_ERROR;
static evi_param_p hentry_p, hid_p, cid_p, fromt_p, tot_p;
static evi_param_p ostate_p, nstate_p;
int dialog_cleanup( struct sip_msg *msg, void *param )
{
if (current_processing_ctx && ctx_dialog_get()) {
unref_dlg( ctx_dialog_get(), 1);
ctx_dialog_set(NULL);
}
return SCB_RUN_ALL;
}
struct dlg_cell *get_current_dialog(void)
{
struct cell *trans;
if (current_processing_ctx && ctx_dialog_get()) {
/* use the processing context */
return ctx_dialog_get();
}
/* look into transaction */
trans = d_tmb.t_gett();
if (trans==NULL || trans==T_UNDEFINED) {
/* no transaction */
return NULL;
}
if (current_processing_ctx && trans->dialog_ctx) {
/* if we have context, but no dlg info, and we
found dlg info into transaction, populate
the dialog too */
ref_dlg((struct dlg_cell*)trans->dialog_ctx, 1);
ctx_dialog_set(trans->dialog_ctx);
}
return (struct dlg_cell*)trans->dialog_ctx;
}
int init_dlg_table(unsigned int size)
{
unsigned int n;
unsigned int i;
d_table = (struct dlg_table*)shm_malloc
( sizeof(struct dlg_table) + size*sizeof(struct dlg_entry));
if (d_table==0) {
LM_ERR("no more shm mem (1)\n");
goto error0;
}
#if defined(DBG_STRUCT_HIST) && defined(DBG_DIALOG)
dlg_hist = shl_init("dialog hist", 10000, 0);
if (!dlg_hist) {
LM_ERR("oom\n");
goto error1;
}
#endif
memset( d_table, 0, sizeof(struct dlg_table) );
d_table->size = size;
d_table->entries = (struct dlg_entry*)(d_table+1);
n = (size<MAX_LDG_LOCKS)?size:MAX_LDG_LOCKS;
for( ; n>=MIN_LDG_LOCKS ; n-- ) {
d_table->locks = lock_set_alloc(n);
if (d_table->locks==0)
continue;
if (lock_set_init(d_table->locks)==0) {
lock_set_dealloc(d_table->locks);
d_table->locks = 0;
continue;
}
d_table->locks_no = n;
break;
}
if (d_table->locks==0) {
LM_ERR("unable to allocted at least %d locks for the hash table\n",
MIN_LDG_LOCKS);
goto error1;
}
for( i=0 ; i<size; i++ ) {
memset( &(d_table->entries[i]), 0, sizeof(struct dlg_entry) );
d_table->entries[i].next_id = rand();
d_table->entries[i].lock_idx = i % d_table->locks_no;
}
return 0;
error1:
shm_free( d_table );
error0:
return -1;
}
static inline void free_dlg_dlg(struct dlg_cell *dlg)
{
struct dlg_val *dv;
unsigned int i;
if (dlg->cbs.first)
destroy_dlg_callbacks_list(dlg->cbs.first);
context_destroy(CONTEXT_DIALOG, context_of(dlg));
if (dlg->profile_links) {
destroy_linkers_unsafe(dlg);
remove_dlg_prof_table(dlg, 0);
}
if (dlg->legs) {
for( i=0 ; i<dlg->legs_no[DLG_LEGS_USED] ; i++) {
shm_free(dlg->legs[i].tag.s);
shm_free(dlg->legs[i].r_cseq.s);
if (dlg->legs[i].inv_cseq.s)
shm_free(dlg->legs[i].inv_cseq.s);
if (dlg->legs[i].prev_cseq.s)
shm_free(dlg->legs[i].prev_cseq.s);
if (dlg->legs[i].contact.s)
shm_free(dlg->legs[i].contact.s);
if (dlg->legs[i].route_set.s)
shm_free(dlg->legs[i].route_set.s);
if (dlg->legs[i].adv_contact.s)
shm_free(dlg->legs[i].adv_contact.s);
if (dlg->legs[i].from_uri.s)
shm_free(dlg->legs[i].from_uri.s);
if (dlg->legs[i].to_uri.s)
shm_free(dlg->legs[i].to_uri.s);
if (dlg->legs[i].out_sdp.s)
shm_free(dlg->legs[i].out_sdp.s);
if (dlg->legs[i].in_sdp.s)
shm_free(dlg->legs[i].in_sdp.s);
}
shm_free(dlg->legs);
}
while (dlg->vals) {
dv = dlg->vals;
dlg->vals = dlg->vals->next;
shm_free(dv);
}
if (dlg->shtag.s)
shm_free(dlg->shtag.s);
if (dlg->terminate_reason.s)
shm_free(dlg->terminate_reason.s);
#ifdef DBG_DIALOG
sh_log(dlg->hist, DLG_DESTROY, "ref %d", dlg->ref);
sh_unref(dlg->hist);
dlg->hist = NULL;
#endif
shm_free(dlg);
}
void destroy_dlg(struct dlg_cell *dlg)
{
int ret = 0;
LM_DBG("destroying dialog %p\n",dlg);
ret = remove_dlg_timer(&dlg->tl);
if (ret < 0) {
LM_CRIT("unable to unlink the timer on dlg %p [%u:%u] "
"with clid '%.*s' and tags '%.*s' '%.*s'\n",
dlg, dlg->h_entry, dlg->h_id,
dlg->callid.len, dlg->callid.s,
dlg_leg_print_info( dlg, DLG_CALLER_LEG, tag),
dlg_leg_print_info( dlg, callee_idx(dlg), tag));
} else if (ret > 0) {
LM_DBG("dlg expired or not in list - dlg %p [%u:%u] "
"with clid '%.*s' and tags '%.*s' '%.*s'\n",
dlg, dlg->h_entry, dlg->h_id,
dlg->callid.len, dlg->callid.s,
dlg_leg_print_info( dlg, DLG_CALLER_LEG, tag),
dlg_leg_print_info( dlg, callee_idx(dlg), tag));
}
run_dlg_callbacks(DLGCB_DESTROY , dlg, 0, DLG_DIR_NONE, NULL, 0, 1);
free_dlg_dlg(dlg);
}
void destroy_dlg_table(void)
{
struct dlg_cell *dlg, *l_dlg;
unsigned int i;
if (d_table==0)
return;
if (d_table->locks) {
lock_set_destroy(d_table->locks);
lock_set_dealloc(d_table->locks);
}
for( i=0 ; i<d_table->size; i++ ) {
dlg = d_table->entries[i].first;
while (dlg) {
l_dlg = dlg;
dlg = dlg->next;
free_dlg_dlg(l_dlg);
}
}
shm_free(d_table);
d_table = 0;
return;
}
struct dlg_cell* build_new_dlg( str *callid, str *from_uri, str *to_uri,
str *from_tag)
{
struct dlg_cell *dlg;
int len;
char *p;
len = sizeof(struct dlg_cell) + callid->len + from_uri->len +
to_uri->len + context_size(CONTEXT_DIALOG);
dlg = (struct dlg_cell*)shm_malloc( len );
if (dlg==0) {
LM_ERR("no more shm mem (%d)\n",len);
return 0;
}
memset(dlg, 0, len);
#if defined(DBG_STRUCT_HIST) && defined(DBG_DIALOG)
dlg->hist = sh_push(dlg, dlg_hist);
if (!dlg->hist) {
LM_ERR("oom\n");
shm_free(dlg);
return NULL;
}
#endif
dlg->state = DLG_STATE_UNCONFIRMED;
dlg->h_entry = dlg_hash( callid);
LM_DBG("new dialog %p (c=%.*s,f=%.*s,t=%.*s,ft=%.*s) on hash %u\n",
dlg, callid->len,callid->s, from_uri->len, from_uri->s,
to_uri->len,to_uri->s, from_tag->len, from_tag->s, dlg->h_entry);
p = (char*)(dlg+1);
/* dialog context has to be first, otherwise context_of will break */
p += context_size(CONTEXT_DIALOG);
dlg->callid.s = p;
dlg->callid.len = callid->len;
memcpy( p, callid->s, callid->len);
p += callid->len;
dlg->from_uri.s = p;
dlg->from_uri.len = from_uri->len;
memcpy( p, from_uri->s, from_uri->len);
p += from_uri->len;
dlg->to_uri.s = p;
dlg->to_uri.len = to_uri->len;
memcpy( p, to_uri->s, to_uri->len);
p += to_uri->len;
return dlg;
}
int dlg_clone_callee_leg(struct dlg_cell *dlg, int cloned_leg_idx)
{
struct dlg_leg *leg, *src_leg;
if (ensure_leg_array(dlg->legs_no[DLG_LEGS_USED] + 1, dlg) != 0)
return -1;
src_leg = &dlg->legs[cloned_leg_idx];
leg = &dlg->legs[dlg->legs_no[DLG_LEGS_USED]];
if (shm_str_dup(&leg->adv_contact, &src_leg->adv_contact) != 0) {
LM_ERR("oom contact\n");
return -1;
}
if (src_leg->out_sdp.s && shm_str_dup(&leg->out_sdp, &src_leg->out_sdp) != 0) {
shm_free(leg->adv_contact.s);
LM_ERR("oom sdp\n");
return -1;
}
return dlg->legs_no[DLG_LEGS_USED]++;
}
static inline int translate_contact_ipport( str *ct, struct socket_info *sock,
str *dst)
{
struct hdr_field ct_hdr;
struct contact_body *cb;
contact_t *c;
struct sip_uri puri;
str hostport;
str *send_address_str, *send_port_str;
char *p;
/* rely on the fact that the replicated hdr is well formated, so
* skip the hdr name */
if ((p=q_memchr(ct->s, ':', ct->len))==NULL) {
LM_ERR("failed find hdr body in "
"advertised contact <%.*s>\n", ct->len, ct->s);
}
memset( &ct_hdr, 0, sizeof(ct_hdr));
ct_hdr.body.s = p+1;
ct_hdr.body.len = (ct->s+ct->len)-ct_hdr.body.s;
if (parse_contact( &ct_hdr )<0 ||
(cb=(contact_body_t*)ct_hdr.parsed)==NULL ||
(c=cb->contacts)==NULL || c->next!=NULL ) {
LM_ERR("failed to parsed or wrong nr of contacts in "
"advertised contact <%.*s>\n", ct->len, ct->s);
return -1;
}
if (parse_uri( c->uri.s, c->uri.len, &puri)<0) {
LM_ERR("failed to parsed URI in contact <%.*s>\n",
c->uri.len, c->uri.s);
goto error;
}
hostport.s = puri.host.s;
hostport.len = puri.port.len ?
(puri.port.s+puri.port.len-puri.host.s) : puri.host.len ;
LM_DBG("replacing <%.*s> from ct <%.*s>\n",
hostport.len, hostport.s, ct->len, ct->s);
/* init send_address_str & send_port_str */
if(sock->adv_name_str.len)
send_address_str=&(sock->adv_name_str);
else if (default_global_address.s)
send_address_str=&default_global_address;
else
send_address_str=&(sock->address_str);
if(sock->adv_port_str.len)
send_port_str=&(sock->adv_port_str);
else if (default_global_port.s)
send_port_str=&default_global_port;
else
send_port_str=&(sock->port_no_str);
dst->len = (hostport.s - ct->s) + /* staring preserved part */
(send_address_str->len + 1 + send_port_str->len) + /*new ip:port part*/
(ct->s + ct->len - hostport.s - hostport.len);
dst->s = (char*)shm_malloc( dst->len );
if (dst->s==NULL) {
LM_ERR("failed to allocated new host:port, len %d\n",dst->len);
goto error;
}
/* start building the new ct hdr */
p = dst->s;
memcpy( p, ct->s, hostport.s - ct->s);
p += hostport.s - ct->s;
memcpy( p, send_address_str->s, send_address_str->len);
p += send_address_str->len;
*(p++) = ':';
memcpy( p, send_port_str->s, send_port_str->len);
p += send_port_str->len;
memcpy( p, hostport.s+hostport.len, ct->s+ct->len-hostport.s-hostport.len);
p += ct->s+ct->len-hostport.s-hostport.len;
LM_DBG("resulting ct is <%.*s> / %d\n",
dst->len, dst->s, dst->len);
free_contact( &cb );
return 0;
error:
free_contact( &cb );
return -1;
}
/* first time it will called for a CALLER leg - at that time there will
be no leg allocated, so automatically CALLER gets the first position, while
the CALLEE legs will follow into the array in the same order they came */
int dlg_update_leg_info(int leg_idx, struct dlg_cell *dlg, str* tag, str *rr,
str *contact, str *adv_ct, str *cseq, struct socket_info *sock,
str *mangled_from,str *mangled_to,str *in_sdp, str *out_sdp)
{
struct dlg_leg *leg;
rr_t *head = NULL, *rrp;
if (leg_idx >= MAX_BRANCHES) {
LM_WARN("invalid callee leg index (branch id part): %d\n", leg_idx);
return -1;
}
if (ensure_leg_array(leg_idx + 1, dlg) != 0)
return -1;
leg = &dlg->legs[leg_idx];
leg->tag.s = (char*)shm_malloc(tag->len);
if ( leg->tag.s==NULL) {
LM_ERR("no more shm mem for tag\n");
return -1;
}
leg->r_cseq.s = (char*)shm_malloc( cseq->len );
if (leg->r_cseq.s==NULL) {
LM_ERR("no more shm mem for cseq\n");
goto error1;
}
if (dlg->legs_no[DLG_LEGS_USED] == 0) {
/* first leg = caller. also store inv cseq */
leg->inv_cseq.s = (char *)shm_malloc( cseq->len);
if (leg->inv_cseq.s == NULL) {
LM_ERR("no more shm mem\n");
goto error2;
}
}
if (contact->len) {
/* contact */
leg->contact.s = shm_malloc(contact->len);
if (leg->contact.s==NULL) {
LM_ERR("no more shm mem\n");
goto error2;
}
leg->contact.len = contact->len;
memcpy( leg->contact.s, contact->s, contact->len);
/* rr */
if (rr->len) {
leg->route_set.s = shm_malloc(rr->len);
if (leg->route_set.s==NULL) {
LM_ERR("no more shm mem for rr set\n");
goto error_all;
}
leg->route_set.len = rr->len;
memcpy(leg->route_set.s, rr->s, rr->len);
if (parse_rr_body(leg->route_set.s,leg->route_set.len,&head) != 0) {
LM_ERR("failed parsing route set\n");
goto error_all;
}
rrp = head;
leg->nr_uris = 0;
while (rrp) {
leg->route_uris[leg->nr_uris++] = rrp->nameaddr.uri;
rrp = rrp->next;
}
free_rr(&head);
}
}
/* save mangled FROM/TO URIs, if any */
if (mangled_from && mangled_from->s && mangled_from->len &&
shm_str_dup( &leg->from_uri, mangled_from)==-1 ) {
LM_ERR("failed to shm duplicate mangled FROM hdr\n");
goto error_all;
}
if (mangled_to && mangled_to->s && mangled_to->len &&
shm_str_dup( &leg->to_uri, mangled_to)==-1 ) {
LM_ERR("failed to shm duplicate mangled TO hdr\n");
goto error_all;
}
/* these are the inbound/outbound SDPs for this leg */
if (in_sdp && in_sdp->s && in_sdp->len &&
shm_str_dup( &leg->in_sdp, in_sdp)==-1 ) {
LM_ERR("failed to shm duplicate inbound SDP\n");
goto error_all;
}
if (out_sdp && out_sdp->s && out_sdp->len &&
shm_str_dup( &leg->out_sdp, out_sdp)==-1 ) {
LM_ERR("failed to shm duplicate outbound SDP\n");
goto error_all;
}
/* this is the advertised contact for this leg */
if (adv_ct && adv_ct->s && adv_ct->len) {
/* if the advertised tag is correlated with an interface indetified
* by a TAG, it means that the actual IP of the interface may be
* different, so we better re-compute the IP:port part of the contact*/
if (sock->tag.s) {
if (translate_contact_ipport(adv_ct,sock, &leg->adv_contact)<0){
LM_ERR("failed to shm translate advertised contact\n");
goto error_all;
}
} else if (shm_str_dup( &leg->adv_contact, adv_ct)==-1 ) {
LM_ERR("failed to shm duplicate advertised contact\n");
goto error_all;
}
}
/* tag */
leg->tag.len = tag->len;
memcpy( leg->tag.s, tag->s, tag->len);
/* socket */
leg->bind_addr = sock;
if (dlg->legs_no[DLG_LEGS_USED] == 0)
{
/* first leg = caller . store inv cseq */
leg->inv_cseq.len = cseq->len;
memcpy(leg->inv_cseq.s,cseq->s,cseq->len);
/* set cseq for caller to 0
* future requests to the caller leg will update this
* needed for proper validation of in-dialog requests
*
* TM also increases this value by one, if dialog
* is terminated from the middle, so 0 is ok*/
leg->r_cseq.len = 1;
leg->r_cseq.s[0]='0';
} else {
/* cseq */
leg->r_cseq.len = cseq->len;
memcpy( leg->r_cseq.s, cseq->s, cseq->len);
}
/* make leg visible for searchers */
if (leg_idx >= dlg->legs_no[DLG_LEGS_USED])
dlg->legs_no[DLG_LEGS_USED] = leg_idx + 1;
LM_DBG("set leg %d for %p: tag=<%.*s> rcseq=<%.*s>\n",
dlg->legs_no[DLG_LEGS_USED]-1, dlg,
leg->tag.len,leg->tag.s,
leg->r_cseq.len,leg->r_cseq.s );
return 0;
error_all:
if (leg->to_uri.s) {
shm_free(leg->to_uri.s);
leg->to_uri.s = NULL;
}
if (leg->from_uri.s) {
shm_free(leg->from_uri.s);
leg->from_uri.s = NULL;
}
if (leg->route_set.s) {
shm_free(leg->route_set.s);
leg->route_set.s = NULL;
}
if (leg->contact.s) {
shm_free(leg->contact.s);
leg->contact.s = NULL;
}
if (leg->in_sdp.s) {
shm_free(leg->in_sdp.s);
leg->in_sdp.s = NULL;
}
error2:
shm_free(leg->r_cseq.s);
error1:
shm_free(leg->tag.s);
return -1;
}
/* update cseq filed in leg
* if inv = 1, update the inv_cseq field
* else, update the r_cseq */
int dlg_update_cseq(struct dlg_cell * dlg, unsigned int leg, str *cseq,int inv)
{
str* update_cseq;
if (inv == 1)
update_cseq = &dlg->legs[leg].inv_cseq;
else
update_cseq = &dlg->legs[leg].r_cseq;
if ( update_cseq->s ) {
if (update_cseq->len < cseq->len) {
update_cseq->s = (char*)shm_realloc(update_cseq->s,cseq->len);
if (update_cseq->s==NULL) {
LM_ERR("no more shm mem for realloc (%d)\n",cseq->len);
goto error;
}
}
} else {
update_cseq->s = (char*)shm_malloc(cseq->len);
if (update_cseq->s==NULL) {
LM_ERR("no more shm mem for malloc (%d)\n",cseq->len);
goto error;
}
}
memcpy( update_cseq->s, cseq->s, cseq->len );
update_cseq->len = cseq->len;
if (inv == 1)
LM_DBG("dlg %p[%d]: last invite cseq is %.*s\n", dlg,leg,
dlg->legs[leg].inv_cseq.len, dlg->legs[leg].inv_cseq.s);
else
LM_DBG("dlg %p[%d]: cseq is %.*s\n", dlg,leg,
dlg->legs[leg].r_cseq.len, dlg->legs[leg].r_cseq.s);
return 0;
error:
LM_ERR("not more shm mem\n");
return -1;
}
int dlg_update_routing(struct dlg_cell *dlg, unsigned int leg,
str *rr, str *contact)
{
rr_t *head = NULL, *rrp;
LM_DBG("dialog %p[%d]: rr=<%.*s> contact=<%.*s>\n",
dlg, leg,
rr->len,rr->s,
contact->len,contact->s );
if (dlg->legs[leg].contact.s)
shm_free(dlg->legs[leg].contact.s);
dlg->legs[leg].contact.s = shm_malloc(contact->len);
if (dlg->legs[leg].contact.s==NULL) {
LM_ERR("no more shm mem\n");
return -1;
}
dlg->legs[leg].contact.len = contact->len;
memcpy( dlg->legs[leg].contact.s, contact->s, contact->len);
/* rr */
if (rr->len) {
if (dlg->legs[leg].route_set.s)
shm_free(dlg->legs[leg].route_set.s);
dlg->legs[leg].route_set.s = shm_malloc(rr->len);
if (!dlg->legs[leg].route_set.s) {
LM_ERR("failed to alloc route set!\n");
/* leave the contact there, otherwise we will get no contact at
* all, or worse, we will use free'd memory */
return -1;
}
dlg->legs[leg].route_set.len = rr->len;
memcpy( dlg->legs[leg].route_set.s, rr->s, rr->len);
/* also update URI pointers */
if (parse_rr_body(dlg->legs[leg].route_set.s,
dlg->legs[leg].route_set.len,&head) != 0) {
LM_ERR("failed parsing route set\n");
shm_free(dlg->legs[leg].route_set.s);
dlg->legs[leg].route_set.s = NULL;
return -1;
}
rrp = head;
dlg->legs[leg].nr_uris = 0;
while (rrp) {
dlg->legs[leg].route_uris[dlg->legs[leg].nr_uris++] = rrp->nameaddr.uri;
rrp = rrp->next;
}
free_rr(&head);
}
return 0;
}
struct dlg_cell* lookup_dlg( unsigned int h_entry, unsigned int h_id)
{
struct dlg_cell *dlg;
struct dlg_entry *d_entry;
if (h_entry>=d_table->size)
goto not_found;
d_entry = &(d_table->entries[h_entry]);
dlg_lock( d_table, d_entry);
for( dlg=d_entry->first ; dlg ; dlg=dlg->next ) {
if (dlg->h_id == h_id) {
if (dlg->state==DLG_STATE_DELETED) {
dlg_unlock( d_table, d_entry);
goto not_found;
}
DBG_REF(dlg, 1);
dlg->ref++;
dlg_unlock( d_table, d_entry);
LM_DBG("dialog id=%u found on entry %u\n", h_id, h_entry);
return dlg;
}
}
dlg_unlock( d_table, d_entry);
not_found:
LM_DBG("no dialog id=%u found on entry %u\n", h_id, h_entry);
return 0;
}
/* Get dialog that correspond to CallId, From Tag and To Tag */
/* See RFC 3261, paragraph 4. Overview of Operation: */
/* "The combination of the To tag, From tag, and Call-ID completely */
/* defines a peer-to-peer SIP relationship between [two UAs] and is */
/* referred to as a dialog."*/
struct dlg_cell* get_dlg( str *callid, str *ftag, str *ttag,
unsigned int *dir, unsigned int *dst_leg)
{
struct dlg_cell *dlg;
struct dlg_entry *d_entry;
unsigned int h_entry;
h_entry = dlg_hash(callid);
d_entry = &(d_table->entries[h_entry]);
dlg_lock( d_table, d_entry);
LM_DBG("input ci=<%.*s>(%d), tt=<%.*s>(%d), ft=<%.*s>(%d)\n",
callid->len,callid->s, callid->len,
ftag->len, ftag->s, ftag->len,
ttag->len, ttag->s, ttag->len);
for( dlg = d_entry->first ; dlg ; dlg = dlg->next ) {
/* Check callid / fromtag / totag */
#ifdef EXTRA_DEBUG
LM_DBG("DLG (%p)(%d): ci=<%.*s>(%d), ft=<%.*s>(%d), tt=<%.*s>(%d),"
"ct_er=%d, ct_ee=%d\n",
dlg,dlg->state,dlg->callid.len,dlg->callid.s, dlg->callid.len,
dlg->legs[DLG_CALLER_LEG].tag.len,dlg->legs[DLG_CALLER_LEG].tag.s,
dlg->legs[DLG_CALLER_LEG].tag.len,
dlg->legs[callee_idx(dlg)].tag.len,dlg->legs[callee_idx(dlg)].tag.s,
dlg->legs[callee_idx(dlg)].tag.len,
dlg->legs[DLG_CALLER_LEG].contact.len,
dlg->legs[DLG_CALLER_LEG].contact.len);
#endif
if (match_dialog( dlg, callid, ftag, ttag, dir, dst_leg)==1) {
if (dlg->state==DLG_STATE_DELETED)
/* even if matched, skip the deleted dialogs as they may be
a previous unsuccessful attempt of established call
with the same callid and fromtag - like in auth/challenge
case -bogdan */
continue;
DBG_REF(dlg, 1);
dlg->ref++;
dlg_unlock( d_table, d_entry);
LM_DBG("dialog callid='%.*s' found\n on entry %u, dir=%d\n",
callid->len, callid->s,h_entry,*dir);
return dlg;
}
}
dlg_unlock( d_table, d_entry);
LM_DBG("no dialog callid='%.*s' found\n", callid->len, callid->s);
return 0;
}
struct dlg_cell* get_dlg_by_val(str *attr, str *val)
{
struct dlg_entry *d_entry;
struct dlg_cell *dlg;
unsigned int h;
/* go through all hash entries (entire table) */
for ( h=0 ; h<d_table->size ; h++ ) {
d_entry = &(d_table->entries[h]);
dlg_lock( d_table, d_entry);
/* go through all dialogs on entry */
for( dlg = d_entry->first ; dlg ; dlg = dlg->next ) {
LM_DBG("dlg in state %d to check\n",dlg->state);
if ( dlg->state>DLG_STATE_CONFIRMED )
continue;
if (check_dlg_value_unsafe( dlg, attr, val)==0) {
ref_dlg_unsafe( dlg, 1);
dlg_unlock( d_table, d_entry);
return dlg;
}
}
dlg_unlock( d_table, d_entry);
}
return NULL;
}
struct dlg_cell* get_dlg_by_callid( str *callid, int active_only)
{
struct dlg_cell *dlg;
struct dlg_entry *d_entry;
unsigned int h_entry;
h_entry = dlg_hash(callid);
d_entry = &(d_table->entries[h_entry]);
dlg_lock( d_table, d_entry);
LM_DBG("input ci=<%.*s>(%d)\n", callid->len,callid->s, callid->len);
for( dlg = d_entry->first ; dlg ; dlg = dlg->next ) {
if ( active_only && dlg->state>DLG_STATE_CONFIRMED )
continue;
if ( dlg->callid.len==callid->len &&
strncmp( dlg->callid.s, callid->s, callid->len)==0 ) {
ref_dlg_unsafe( dlg, 1);
dlg_unlock( d_table, d_entry);
return dlg;
}
}
dlg_unlock( d_table, d_entry);
return NULL;
}
void link_dlg(struct dlg_cell *dlg, int extra_refs)
{
struct dlg_entry *d_entry;
d_entry = &(d_table->entries[dlg->h_entry]);
dlg_lock(d_table, d_entry);
link_dlg_unsafe(d_entry, dlg);
DBG_REF(dlg, extra_refs);
dlg->ref += extra_refs;
LM_DBG("ref dlg %p with %d -> %d in h_entry %p - %d \n",
dlg, extra_refs + 1, dlg->ref, d_entry, dlg->h_entry);
dlg_unlock( d_table, d_entry);
}
void unlink_unsafe_dlg(struct dlg_entry *d_entry,
struct dlg_cell *dlg)
{
if (dlg->next)
dlg->next->prev = dlg->prev;
else
d_entry->last = dlg->prev;
if (dlg->prev)
dlg->prev->next = dlg->next;
else
d_entry->first = dlg->next;
dlg->next = dlg->prev = 0;
d_entry->cnt--;
return;
}
void _ref_dlg(struct dlg_cell *dlg, unsigned int cnt)
{
struct dlg_entry *d_entry;
d_entry = &(d_table->entries[dlg->h_entry]);
dlg_lock( d_table, d_entry);
ref_dlg_unsafe( dlg, cnt);
dlg_unlock( d_table, d_entry);
}
void _unref_dlg(struct dlg_cell *dlg, unsigned int cnt)
{
struct dlg_entry *d_entry;
d_entry = &(d_table->entries[dlg->h_entry]);
dlg_lock( d_table, d_entry);
unref_dlg_unsafe( dlg, cnt, d_entry);
dlg_unlock( d_table, d_entry);
}
/*
* create DLG_STATE_CHANGED_EVENT
*/
int state_changed_event_init(void)
{
/* publish the event */
ei_st_ch_id = evi_publish_event(ei_st_ch_name);
if (ei_st_ch_id == EVI_ERROR) {
LM_ERR("cannot register dialog state changed event\n");
return -1;
}
event_params = pkg_malloc(sizeof(evi_params_t));
if (event_params == NULL) {
LM_ERR("no more pkg mem\n");
return -1;
}
memset(event_params, 0, sizeof(evi_params_t));
hentry_p = evi_param_create(event_params, &ei_h_entry);
if (hentry_p == NULL)
goto create_error;