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kamailio/modules/dialog/dlg_handlers.c

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/*
* Copyright (C) 2006 Voice System SRL
*
* 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 Functions related to dialog handling
* \ingroup dialog
* Module: \ref dialog
*/
#include <string.h>
#include <time.h>
#include "../../trim.h"
#include "../../pvar.h"
#include "../../timer.h"
#include "../../lib/kcore/statistics.h"
#include "../../action.h"
#include "../../script_cb.h"
#include "../../pt.h"
#include "../../lib/kcore/faked_msg.h"
#include "../../parser/parse_from.h"
#include "../../parser/parse_cseq.h"
#include "../../parser/contact/parse_contact.h"
#include "../../parser/parse_from.h"
#include "../../parser/parse_rr.h"
#include "../../modules/tm/tm_load.h"
#include "../rr/api.h"
#include "dlg_hash.h"
#include "dlg_timer.h"
#include "dlg_cb.h"
#include "dlg_cseq.h"
#include "dlg_handlers.h"
#include "dlg_req_within.h"
#include "dlg_db_handler.h"
#include "dlg_profile.h"
#include "dlg_var.h"
static str rr_param; /*!< record-route parameter for matching */
static int dlg_flag_mask=0; /*!< flag for dialog tracking */
static pv_spec_t *timeout_avp; /*!< AVP for timeout setting */
static int default_timeout; /*!< default dialog timeout */
static int seq_match_mode; /*!< dlg_match mode */
static int shutdown_done = 0; /*!< 1 when destroy_dlg_handlers was called */
extern int detect_spirals;
extern int dlg_timeout_noreset;
extern int initial_cbs_inscript;
extern int dlg_send_bye;
extern int dlg_event_rt[DLG_EVENTRT_MAX];
extern int dlg_wait_ack;
int spiral_detected = -1;
extern struct rr_binds d_rrb; /*!< binding to record-routing module */
/* statistic variables */
extern stat_var *early_dlgs; /*!< number of early dialogs */
extern stat_var *processed_dlgs; /*!< number of processed dialogs */
extern stat_var *expired_dlgs; /*!< number of expired dialogs */
extern stat_var *failed_dlgs; /*!< number of failed dialogs */
extern pv_elem_t *ruri_param_model; /*!< pv-string to get r-uri */
static unsigned int CURR_DLG_LIFETIME = 0; /*!< current dialog lifetime */
static unsigned int CURR_DLG_STATUS = 0; /*!< current dialog state */
static unsigned int CURR_DLG_ID = 0xffffffff; /*!< current dialog id */
/*! size of the dialog record-route parameter */
#define RR_DLG_PARAM_SIZE (2*2*sizeof(int)+3+MAX_DLG_RR_PARAM_NAME)
/*! separator inside the record-route paramter */
#define DLG_SEPARATOR '.'
int dlg_set_tm_callbacks(tm_cell_t *t, sip_msg_t *req, dlg_cell_t *dlg,
int mode);
int dlg_set_tm_waitack(tm_cell_t *t, dlg_cell_t *dlg);
/*!
* \brief Initialize the dialog handlers
* \param rr_param_p added record-route parameter
* \param dlg_flag_p dialog flag
* \param timeout_avp_p AVP for timeout setting
* \param default_timeout_p default timeout
* \param seq_match_mode_p matching mode
*/
void init_dlg_handlers(char *rr_param_p, int dlg_flag_p,
pv_spec_t *timeout_avp_p ,int default_timeout_p,
int seq_match_mode_p)
{
rr_param.s = rr_param_p;
rr_param.len = strlen(rr_param.s);
if(dlg_flag_p>=0) dlg_flag_mask = 1<<dlg_flag_p;
timeout_avp = timeout_avp_p;
default_timeout = default_timeout_p;
seq_match_mode = seq_match_mode_p;
}
/*!
* \brief Shutdown operation of the module
*/
void destroy_dlg_handlers(void)
{
shutdown_done = 1;
}
/*!
* \brief Add record-route parameter for dialog tracking
* \param req SIP request
* \param entry dialog hash entry
* \param id dialog hash id
* \return 0 on success, -1 on failure
*/
static inline int add_dlg_rr_param(struct sip_msg *req, unsigned int entry,
unsigned int id)
{
static char buf[RR_DLG_PARAM_SIZE];
str s;
int n;
char *p;
s.s = p = buf;
*(p++) = ';';
memcpy(p, rr_param.s, rr_param.len);
p += rr_param.len;
*(p++) = '=';
n = RR_DLG_PARAM_SIZE - (p-buf);
if (int2reverse_hex( &p, &n, entry)==-1)
return -1;
*(p++) = DLG_SEPARATOR;
n = RR_DLG_PARAM_SIZE - (p-buf);
if (int2reverse_hex( &p, &n, id)==-1)
return -1;
s.len = p-buf;
if (d_rrb.add_rr_param( req, &s)<0) {
LM_ERR("failed to add rr param\n");
return -1;
}
return 0;
}
/*!
* \brief Parse SIP message and populate leg informations
*
* Parse SIP message and populate leg informations.
* \param dlg the dialog to add cseq, contact & record_route
* \param msg sip message
* \param t transaction
* \param leg type of the call leg
* \param tag SIP To tag
* \return 0 on success, -1 on failure
* \note for a request: get record route in normal order, for a reply get
* in reverse order, skipping the ones from the request and the proxies' own
*/
int populate_leg_info( struct dlg_cell *dlg, struct sip_msg *msg,
struct cell* t, unsigned int leg, str *tag)
{
unsigned int skip_recs;
str cseq;
str contact;
str rr_set;
dlg->bind_addr[leg] = msg->rcv.bind_address;
/* extract the cseq number as string */
if (leg==DLG_CALLER_LEG) {
if((!msg->cseq && (parse_headers(msg,HDR_CSEQ_F,0)<0 || !msg->cseq))
|| !msg->cseq->parsed){
LM_ERR("bad sip message or missing CSeq hdr :-/\n");
goto error0;
}
cseq = (get_cseq(msg))->number;
} else {
/* use the same as in request */
cseq = dlg->cseq[DLG_CALLEE_LEG];
}
/* extract the contact address */
if (!msg->contact&&(parse_headers(msg,HDR_CONTACT_F,0)<0||!msg->contact)){
LM_ERR("bad sip message or missing Contact hdr\n");
goto error0;
}
if ( parse_contact(msg->contact)<0 ||
((contact_body_t *)msg->contact->parsed)->contacts==NULL ||
((contact_body_t *)msg->contact->parsed)->contacts->next!=NULL ) {
LM_ERR("bad Contact HDR\n");
goto error0;
}
contact = ((contact_body_t *)msg->contact->parsed)->contacts->uri;
/* extract the RR parts */
if(!msg->record_route && (parse_headers(msg,HDR_EOH_F,0)<0) ){
LM_ERR("failed to parse record route header\n");
goto error0;
}
if (leg==DLG_CALLER_LEG) {
skip_recs = 0;
} else {
/* was the 200 OK received or local generated */
skip_recs = dlg->from_rr_nb +
((t->relayed_reply_branch>=0)?
((t->uac[t->relayed_reply_branch].flags&TM_UAC_FLAG_R2)?2:
((t->uac[t->relayed_reply_branch].flags&TM_UAC_FLAG_RR)?1:0))
:0);
}
if(msg->record_route){
if( print_rr_body(msg->record_route, &rr_set, leg,
&skip_recs) != 0 ){
LM_ERR("failed to print route records \n");
goto error0;
}
} else {
rr_set.s = 0;
rr_set.len = 0;
}
if(leg==DLG_CALLER_LEG)
dlg->from_rr_nb = skip_recs;
LM_DBG("route_set %.*s, contact %.*s, cseq %.*s and bind_addr %.*s\n",
rr_set.len, rr_set.s, contact.len, contact.s,
cseq.len, cseq.s,
msg->rcv.bind_address->sock_str.len,
msg->rcv.bind_address->sock_str.s);
if (dlg_set_leg_info( dlg, tag, &rr_set, &contact, &cseq, leg)!=0) {
LM_ERR("dlg_set_leg_info failed\n");
if (rr_set.s) pkg_free(rr_set.s);
goto error0;
}
if (rr_set.s) pkg_free(rr_set.s);
return 0;
error0:
return -1;
}
/*!
* \brief Clone dialog internal unique id to shared memory
*/
dlg_iuid_t *dlg_get_iuid_shm_clone(dlg_cell_t *dlg)
{
dlg_iuid_t *iuid = NULL;
if(dlg==NULL)
return NULL;
iuid = (dlg_iuid_t*)shm_malloc(sizeof(dlg_iuid_t));
if(iuid==NULL)
{
LM_ERR("failed to clone dialog iuid\n");
return NULL;
}
memset(iuid, 0, sizeof(dlg_iuid_t));
iuid->h_entry = dlg->h_entry;
iuid->h_id = dlg->h_id;
return iuid;
}
/*!
* \brief Free dialog internal unique id stored in shared memory
*/
void dlg_iuid_sfree(void *iuid)
{
if(iuid) {
LM_DBG("freeing dlg iuid [%u:%u] (%p)\n",
((dlg_iuid_t*)iuid)->h_entry,
((dlg_iuid_t*)iuid)->h_id, iuid);
shm_free(iuid);
}
}
/*!
* \brief Function that executes BYE reply callbacks
* \param t transaction, unused
* \param type type of the callback, should be TMCB_RESPONSE_FWDED
* \param params saved dialog structure inside the callback
*/
static void dlg_terminated_confirmed(tm_cell_t *t, int type,
struct tmcb_params* params)
{
dlg_cell_t *dlg = NULL;
dlg_iuid_t *iuid = NULL;
if(!params || !params->req || !params->param)
{
LM_ERR("invalid parameters!\n");
return;
}
iuid = (dlg_iuid_t*)*params->param;
if(iuid==NULL)
return;
dlg = dlg_get_by_iuid(iuid);
if(dlg==NULL)
{
LM_ERR("failed to get dialog from params!\n");
return;
}
/* dialog termination confirmed (BYE reply) */
run_dlg_callbacks(DLGCB_TERMINATED_CONFIRMED,
dlg,
params->req,
params->rpl,
DLG_DIR_UPSTREAM,
0);
dlg_release(dlg);
}
/*!
* \brief Execute callback for the BYE request and register callback for the BYE reply
* \param req request message
* \param dlg corresponding dialog
* \param dir message direction
*/
static void dlg_terminated(sip_msg_t *req, dlg_cell_t *dlg, unsigned int dir)
{
dlg_iuid_t *iuid = NULL;
if(!req) {
LM_ERR("request is empty!");
return;
}
if(!dlg) {
LM_ERR("dialog is empty!");
return;
}
/* dialog terminated (BYE) */
run_dlg_callbacks(DLGCB_TERMINATED, dlg, req, NULL, dir, 0);
iuid = dlg_get_iuid_shm_clone(dlg);
if(iuid==NULL)
return;
/* register callback for the coresponding reply */
if (d_tmb.register_tmcb(req,
0,
TMCB_RESPONSE_OUT,
dlg_terminated_confirmed,
(void*)iuid,
dlg_iuid_sfree) <= 0 ) {
LM_ERR("cannot register response callback for BYE request\n");
return;
}
}
/*!
* \brief Function that is registered as TM callback and called on T destroy
*
* - happens when wait_ack==1
*
*/
static void dlg_ontdestroy(struct cell* t, int type, struct tmcb_params *param)
{
dlg_cell_t *dlg = NULL;
dlg_iuid_t *iuid = NULL;
iuid = (dlg_iuid_t*)(*param->param);
dlg = dlg_get_by_iuid(iuid);
if(dlg==0)
return;
/* 1 for callback and 1 for dlg lookup */
dlg_unref(dlg, 2);
}
/*!
* \brief Function that is registered as TM callback and called on replies
*
* Function that is registered as TM callback and called on replies. It
* parses the reply and set the appropriate event. This is then used to
* update the dialog state, run eventual dialog callbacks and save or
* update the necessary informations about the dialog.
* \see next_state_dlg
* \param t transaction, unused
* \param type type of the entered callback
* \param param saved dialog structure in the callback
*/
static void dlg_onreply(struct cell* t, int type, struct tmcb_params *param)
{
dlg_cell_t *dlg = NULL;
dlg_iuid_t *iuid = NULL;
int new_state, old_state, unref, event;
str tag;
sip_msg_t *req = param->req;
sip_msg_t *rpl = param->rpl;
if (shutdown_done)
return;
iuid = (dlg_iuid_t*)(*param->param);
dlg = dlg_get_by_iuid(iuid);
if(dlg==0)
return;
unref = 0;
if (type & (TMCB_RESPONSE_IN|TMCB_ON_FAILURE)) {
/* Set the dialog context so it is available in onreply_route and failure_route*/
set_current_dialog(req, dlg);
dlg_set_ctx_iuid(dlg);
goto done;
}
if (type==TMCB_RESPONSE_FWDED) {
/* The state does not change, but the msg is mutable in this callback*/
run_dlg_callbacks(DLGCB_RESPONSE_FWDED, dlg, req, rpl, DLG_DIR_UPSTREAM, 0);
goto done;
}
if (type==TMCB_DESTROY)
event = DLG_EVENT_TDEL;
else if (param->code<200)
event = DLG_EVENT_RPL1xx;
else if (param->code<300)
event = DLG_EVENT_RPL2xx;
else
event = DLG_EVENT_RPL3xx;
next_state_dlg( dlg, event, &old_state, &new_state, &unref);
dlg_run_event_route(dlg, (rpl==FAKED_REPLY)?NULL:rpl, old_state, new_state);
if (new_state==DLG_STATE_EARLY) {
run_dlg_callbacks(DLGCB_EARLY, dlg, req, rpl, DLG_DIR_UPSTREAM, 0);
if (old_state!=DLG_STATE_EARLY)
if_update_stat(dlg_enable_stats, early_dlgs, 1);
goto done;
}
if (new_state==DLG_STATE_CONFIRMED_NA &&
old_state!=DLG_STATE_CONFIRMED_NA && old_state!=DLG_STATE_CONFIRMED ) {
LM_DBG("dialog %p confirmed (ACK pending)\n",dlg);
if (rpl != FAKED_REPLY) {
/* get to tag*/
if ( !rpl->to && ((parse_headers(rpl, HDR_TO_F,0)<0)
|| !rpl->to) ) {
LM_ERR("bad reply or missing TO hdr :-/\n");
tag.s = 0;
tag.len = 0;
} else {
tag = get_to(rpl)->tag_value;
if (tag.s==0 || tag.len==0) {
LM_ERR("missing TAG param in TO hdr :-/\n");
tag.s = 0;
tag.len = 0;
}
}
/* save callee's tag, cseq, contact and record route*/
if (populate_leg_info( dlg, rpl, t, DLG_CALLEE_LEG, &tag) !=0) {
LM_ERR("could not add further info to the dialog\n");
}
} else {
LM_ERR("Faked reply!\n");
}
/* set start time */
dlg->start_ts = (unsigned int)(time(0));
/* save the settings to the database,
* if realtime saving mode configured- save dialog now
* else: the next time the timer will fire the update*/
dlg->dflags |= DLG_FLAG_NEW;
if ( dlg_db_mode==DB_MODE_REALTIME )
update_dialog_dbinfo(dlg);
if (0 != insert_dlg_timer( &dlg->tl, dlg->lifetime )) {
LM_CRIT("Unable to insert dlg %p [%u:%u] on event %d [%d->%d] "
"with clid '%.*s' and tags '%.*s' '%.*s'\n",
dlg, dlg->h_entry, dlg->h_id, event, old_state, new_state,
dlg->callid.len, dlg->callid.s,
dlg->tag[DLG_CALLER_LEG].len, dlg->tag[DLG_CALLER_LEG].s,
dlg->tag[DLG_CALLEE_LEG].len, dlg->tag[DLG_CALLEE_LEG].s);
} else {
/* dialog pointer inserted in timer list */
dlg_ref(dlg, 1);
}
/* dialog confirmed (ACK pending) */
run_dlg_callbacks( DLGCB_CONFIRMED_NA, dlg, req, rpl, DLG_DIR_UPSTREAM, 0);
if (old_state==DLG_STATE_EARLY)
if_update_stat(dlg_enable_stats, early_dlgs, -1);
if (unref) dlg_unref(dlg, unref);
if_update_stat(dlg_enable_stats, active_dlgs, 1);
goto done;
}
if(new_state==DLG_STATE_DELETED && old_state!=DLG_STATE_DELETED) {
/* set end time */
dlg->end_ts = (unsigned int)(time(0));
}
if ( new_state==DLG_STATE_DELETED
&& (old_state==DLG_STATE_UNCONFIRMED
|| old_state==DLG_STATE_EARLY) ) {
LM_DBG("dialog %p failed (negative reply)\n", dlg);
/* dialog setup not completed (3456XX) */
run_dlg_callbacks( DLGCB_FAILED, dlg, req, rpl, DLG_DIR_UPSTREAM, 0);
if(dlg_wait_ack==1)
dlg_set_tm_waitack(t, dlg);
/* do unref */
if (unref)
dlg_unref(dlg, unref);
if (old_state==DLG_STATE_EARLY)
if_update_stat(dlg_enable_stats, early_dlgs, -1);
if_update_stat(dlg_enable_stats, failed_dlgs, 1);
goto done;
}
if (unref) dlg_unref(dlg, unref);
done:
/* unref due to dlg_get_by_iuid() */
dlg_release(dlg);
return;
}
/*!
* \brief Helper function that run dialog callbacks on forwarded requests
* \see dlg_seq_up_onreply
* \see dlg_seq_down_onreply
* \param t transaction, unused
* \param type type of the callback, should be TMCB_RESPONSE_FWDED
* \param param saved dialog structure inside the callback
* \param direction direction of the request
*/
static void dlg_seq_onreply_helper(struct cell* t, int type,
struct tmcb_params *param, const int direction)
{
dlg_cell_t *dlg = NULL;
dlg_iuid_t *iuid = NULL;
if (shutdown_done)
return;
iuid = (dlg_iuid_t*)(*param->param);
dlg = dlg_get_by_iuid(iuid);
if (dlg==0)
return;
if (type==TMCB_RESPONSE_FWDED)
{
run_dlg_callbacks( DLGCB_RESPONSE_WITHIN,
dlg,
param->req,
param->rpl,
direction,
0);
}
dlg_release(dlg);
return;
}
/*!
* \brief Run dialog callbacks on forwarded requests in upstream direction
* \see dlg_seq_onreply_helper
* \param t transaction, unused
* \param type type of the callback, should be TMCB_RESPONSE_FWDED
* \param param saved dialog structure inside the callback
*/
static void dlg_seq_up_onreply(struct cell* t, int type, struct tmcb_params *param)
{
dlg_seq_onreply_helper(t, type, param, DLG_DIR_UPSTREAM);
}
/*!
* \brief Run dialog callbacks on forwarded requests in downstream direction
* \see dlg_seq_onreply_helper
* \param t transaction, unused
* \param type type of the callback, should be TMCB_RESPONSE_FWDED
* \param param saved dialog structure inside the callback
*/
static void dlg_seq_down_onreply(struct cell* t, int type, struct tmcb_params *param)
{
dlg_seq_onreply_helper(t, type, param, DLG_DIR_DOWNSTREAM);
}
/*!
* \brief Return the timeout for a dialog
* \param req SIP message
* \return value from timeout AVP if present or default timeout
*/
inline static int get_dlg_timeout(struct sip_msg *req)
{
pv_value_t pv_val;
if( timeout_avp ) {
if ( pv_get_spec_value( req, timeout_avp, &pv_val)==0 &&
pv_val.flags&PV_VAL_INT && pv_val.ri>0 ) {
return pv_val.ri;
}
LM_DBG("invalid AVP value, using default timeout\n");
}
return default_timeout;
}
/*!
* \brief Helper function to get the necessary content from SIP message
* \param req SIP request
* \param callid found callid
* \param ftag found from tag
* \param ttag found to tag
* \param with_ttag flag set if to tag must be found for success
* \return 0 on success, -1 on failure
*/
static inline int pre_match_parse( struct sip_msg *req, str *callid,
str *ftag, str *ttag, int with_ttag)
{
if (parse_headers(req,HDR_CALLID_F|HDR_TO_F,0)<0 || !req->callid ||
!req->to ) {
LM_ERR("bad request or missing CALLID/TO hdr :-/\n");
return -1;
}
if (get_to(req)->tag_value.len==0) {
if (with_ttag == 1) {
/* out of dialog request with preloaded Route headers; ignore. */
return -1;
} else {
ttag->s = NULL;
ttag->len = 0;
}
} else {
*ttag = get_to(req)->tag_value;
}
if (parse_from_header(req)<0 || get_from(req)->tag_value.len==0) {
LM_ERR("failed to get From header\n");
return -1;
}
/* callid */
*callid = req->callid->body;
trim(callid);
/* from tag */
*ftag = get_from(req)->tag_value;
return 0;
}
/*!
* \brief Function that is registered as TM callback and called on requests
* \see dlg_new_dialog
* \param t transaction, used to created the dialog
* \param type type of the entered callback
* \param param saved dialog structure in the callback
*/
void dlg_onreq(struct cell* t, int type, struct tmcb_params *param)
{
sip_msg_t *req = param->req;
dlg_cell_t *dlg = NULL;
if(req->first_line.u.request.method_value == METHOD_BYE) {
_dlg_ctx.t = 1;
return;
}
if(req->first_line.u.request.method_value != METHOD_INVITE)
return;
dlg = dlg_get_ctx_dialog();
if (dlg!=NULL) {
if (!initial_cbs_inscript) {
if (spiral_detected == 1)
run_dlg_callbacks( DLGCB_SPIRALED, dlg,
req, NULL, DLG_DIR_DOWNSTREAM, 0);
else if (spiral_detected == 0)
run_create_callbacks(dlg, req);
}
}
if (dlg==NULL) {
if((req->flags&dlg_flag_mask)!=dlg_flag_mask)
return;
LM_DBG("dialog creation on config flag\n");
dlg_new_dialog(req, t, 1);
dlg = dlg_get_ctx_dialog();
}
if (dlg!=NULL) {
LM_DBG("dialog added to tm callbacks\n");
dlg_set_tm_callbacks(t, req, dlg, spiral_detected);
_dlg_ctx.t = 1;
dlg_release(dlg);
}
}
/*!
* \brief Unreference a new dialog, helper function for dlg_onreq
* \see dlg_onreq
* \param dialog unreferenced dialog
*/
#if 0
static void unref_new_dialog(void *iuid)
{
struct tmcb_params p;
memset(&p, 0, sizeof(struct tmcb_params));
p.param = (void*)&iuid;
dlg_onreply(0, TMCB_DESTROY, &p);
}
#endif
/*!
* \brief Create a new dialog from a sip message
*
* Create a new dialog from a SIP message, register a callback
* to keep track of the dialog with help of the tm module.
* This function is either called from the request callback, or
* from the dlg_manage function in the configuration script.
* \see dlg_onreq
* \see w_dlg_manage
* \param req SIP message
* \param t transaction
* \param run_initial_cbs if set zero, initial callbacks are not executed
* \return 0 on success, -1 on failure
*/
int dlg_new_dialog(sip_msg_t *req, struct cell *t, const int run_initial_cbs)
{
dlg_cell_t *dlg;
str s;
str callid;
str ftag;
str ttag;
str req_uri;
unsigned int dir;
dlg = dlg_get_ctx_dialog();
if(dlg != NULL) {
dlg_release(dlg);
return -1;
}
if(req->first_line.u.request.method_value != METHOD_INVITE)
return -1;
if(pre_match_parse( req, &callid, &ftag, &ttag, 0)<0) {
LM_WARN("pre-matching failed\n");
return -1;
}
if(ttag.s!=0 && ttag.len!=0)
return -1;
if(pv_printf_s(req, ruri_param_model, &req_uri)<0) {
LM_ERR("error - cannot print the r-uri format\n");
return -1;
}
trim(&req_uri);
dir = DLG_DIR_NONE;
/* search dialog by SIP attributes
* - hash table slot is left locked */
dlg = dlg_search(&callid, &ftag, &ttag, &dir);
if(dlg) {
if (detect_spirals) {
if (spiral_detected == 1) {
dlg_hash_release(&callid);
return 0;
}
if ( dlg->state != DLG_STATE_DELETED ) {
LM_DBG("Callid '%.*s' found, must be a spiraled request\n",
callid.len, callid.s);
spiral_detected = 1;
if (run_initial_cbs)
run_dlg_callbacks( DLGCB_SPIRALED, dlg, req, NULL,
DLG_DIR_DOWNSTREAM, 0);
/* set ctx dlg id shortcuts */
_dlg_ctx.iuid.h_entry = dlg->h_entry;
_dlg_ctx.iuid.h_id = dlg->h_id;
/* search_dlg() has incremented the ref count by 1 */
dlg_release(dlg);
dlg_hash_release(&callid);
return 0;
}
dlg_release(dlg);
}
}
spiral_detected = 0;
dlg = build_new_dlg (&callid /*callid*/,
&(get_from(req)->uri) /*from uri*/,
&(get_to(req)->uri) /*to uri*/,
&ftag/*from_tag*/,
&req_uri /*r-uri*/ );
if (dlg==0) {
dlg_hash_release(&callid);
LM_ERR("failed to create new dialog\n");
return -1;
}
/* save caller's tag, cseq, contact and record route*/
if (populate_leg_info(dlg, req, t, DLG_CALLER_LEG,
&(get_from(req)->tag_value)) !=0) {
dlg_hash_release(&callid);
LM_ERR("could not add further info to the dialog\n");
shm_free(dlg);
return -1;
}
/* Populate initial varlist: */
dlg->vars = get_local_varlist_pointer(req, 1);
/* after dlg_search() slot was kept locked */
link_dlg(dlg, 0, 1);
/* unlock after dlg_search() */
dlg_hash_release(&callid);
dlg->lifetime = get_dlg_timeout(req);
s.s = _dlg_ctx.to_route_name;
s.len = strlen(s.s);
dlg_set_toroute(dlg, &s);
dlg->sflags |= _dlg_ctx.flags;
dlg->iflags |= _dlg_ctx.iflags;
if (dlg_send_bye!=0 || _dlg_ctx.to_bye!=0)
dlg->iflags |= DLG_IFLAG_TIMEOUTBYE;
if (run_initial_cbs) run_create_callbacks( dlg, req);
/* first INVITE seen (dialog created, unconfirmed) */
if ( seq_match_mode!=SEQ_MATCH_NO_ID &&
add_dlg_rr_param( req, dlg->h_entry, dlg->h_id)<0 ) {
LM_ERR("failed to add RR param\n");
goto error;
}
if_update_stat( dlg_enable_stats, processed_dlgs, 1);
_dlg_ctx.cpid = my_pid();
_dlg_ctx.iuid.h_entry = dlg->h_entry;
_dlg_ctx.iuid.h_id = dlg->h_id;
set_current_dialog(req, dlg);
return 0;
error:
if (!spiral_detected)
dlg_unref(dlg, 1); // undo ref regarding linking
return -1;
}
/*!
* \brief add dlg structure to tm callbacks
* \param t current transaction
* \param req current sip request
* \param dlg current dialog
* \param smode if the sip request was spiraled
* \return 0 on success, -1 on failure
*/
int dlg_set_tm_callbacks(tm_cell_t *t, sip_msg_t *req, dlg_cell_t *dlg,
int smode)
{
dlg_iuid_t *iuid = NULL;
if(t==NULL)
return -1;
if(smode==0) {
iuid = dlg_get_iuid_shm_clone(dlg);
if(iuid==NULL)
{
LM_ERR("failed to create dialog unique id clone\n");
goto error;
}
if ( d_tmb.register_tmcb( req, t,
TMCB_RESPONSE_IN|TMCB_RESPONSE_READY|TMCB_RESPONSE_FWDED|TMCB_ON_FAILURE,
dlg_onreply, (void*)iuid, dlg_iuid_sfree)<0 ) {
LM_ERR("failed to register TMCB\n");
goto error;
}
}
dlg->dflags |= DLG_FLAG_TM;
return 0;
error:
dlg_iuid_sfree(iuid);
return -1;
}
/*!
* \brief add dlg structure to tm callbacks to wait for negative ACK
* \param t current transaction
* \param dlg current dialog
* \return 0 on success, -1 on failure
*/
int dlg_set_tm_waitack(tm_cell_t *t, dlg_cell_t *dlg)
{
dlg_iuid_t *iuid = NULL;
if(t==NULL)
return -1;
LM_DBG("registering TMCB to wait for negative ACK\n");
iuid = dlg_get_iuid_shm_clone(dlg);
if(iuid==NULL)
{
LM_ERR("failed to create dialog unique id clone\n");
goto error;
}
dlg_ref(dlg, 1);
if ( d_tmb.register_tmcb( NULL, t,
TMCB_DESTROY,
dlg_ontdestroy, (void*)iuid, dlg_iuid_sfree)<0 ) {
LM_ERR("failed to register TMCB to wait for negative ACK\n");
dlg_unref(dlg, 1);
goto error;
}
return 0;
error:
dlg_iuid_sfree(iuid);
return -1;
}
/*!
* \brief Parse the record-route parameter, to get dialog information back
* \param p start of parameter string
* \param end end of parameter string
* \param h_entry found dialog hash entry
* \param h_id found dialog hash id
* \return 0 on success, -1 on failure
*/
static inline int parse_dlg_rr_param(char *p, char *end, int *h_entry, int *h_id)
{
char *s;
/* sanity checks */
if (!p) {
LM_ERR("NULL start of parameter string");
return -1;
}
if (!end) {
LM_ERR("NULL end of parameter string");
return -1;
}
if (!h_entry) {
LM_ERR("NULL h_entry");
return -1;
}
if (!h_id) {
LM_ERR("NULL h_id");
return -1;
}
for ( s=p ; p<end && *p!=DLG_SEPARATOR ; p++ );
if (*p!=DLG_SEPARATOR) {
LM_ERR("malformed rr param '%.*s'\n", (int)(long)(end-s), s);
return -1;
}
if ( reverse_hex2int( s, p-s, (unsigned int*)h_entry)<0 ) {
LM_ERR("invalid hash entry '%.*s'\n", (int)(long)(p-s), s);
return -1;
}
if ( reverse_hex2int( p+1, end-(p+1), (unsigned int*)h_id)<0 ) {
LM_ERR("invalid hash id '%.*s'\n", (int)(long)(end-(p+1)), p+1 );
return -1;
}
return 0;
}
/*!
* \brief Update the saved Contact information in dialog from SIP message
* \param dlg updated dialog
* \param req SIP request
* \param dir direction of request, must DLG_DIR_UPSTREAM or DLG_DIR_DOWNSTREAM
* \return 0 on success, -1 on failure
*/
static inline int dlg_refresh_contacts(struct dlg_cell *dlg, struct sip_msg *req,
unsigned int dir)
{
str contact;
if(req->first_line.type == SIP_REPLY)
return 0;
if(req->first_line.u.request.method_value != METHOD_INVITE)
return 0;
/* extract the contact address */
if (!req->contact&&(parse_headers(req,HDR_CONTACT_F,0)<0||!req->contact)){
LM_ERR("bad sip message or missing Contact hdr\n");
return -1;
}
if ( parse_contact(req->contact)<0 ||
((contact_body_t *)req->contact->parsed)->contacts==NULL ||
((contact_body_t *)req->contact->parsed)->contacts->next!=NULL ) {
LM_ERR("bad Contact HDR\n");
return -1;
}
contact = ((contact_body_t *)req->contact->parsed)->contacts->uri;
if ( dir==DLG_DIR_UPSTREAM) {
return dlg_update_contact(dlg, DLG_CALLEE_LEG, &contact);
} else if ( dir==DLG_DIR_DOWNSTREAM) {
return dlg_update_contact(dlg, DLG_CALLER_LEG, &contact);
} else {
LM_CRIT("dir is not set!\n");
return -1;
}
}
/*!
* \brief Update the saved CSEQ information in dialog from SIP message
* \param dlg updated dialog
* \param req SIP request
* \param dir direction of request, must DLG_DIR_UPSTREAM or DLG_DIR_DOWNSTREAM
* \return 0 on success, -1 on failure
*/
static inline int update_cseqs(struct dlg_cell *dlg, struct sip_msg *req,
unsigned int dir)
{
if ( (!req->cseq && parse_headers(req,HDR_CSEQ_F,0)<0) || !req->cseq ||
!req->cseq->parsed) {
LM_ERR("bad sip message or missing CSeq hdr :-/\n");
return -1;
}
if ( dir==DLG_DIR_UPSTREAM) {
return dlg_update_cseq(dlg, DLG_CALLEE_LEG,&((get_cseq(req))->number));
} else if ( dir==DLG_DIR_DOWNSTREAM) {
return dlg_update_cseq(dlg, DLG_CALLER_LEG,&((get_cseq(req))->number));
} else {
LM_CRIT("dir is not set!\n");
return -1;
}
}
/*!
* \brief Unreference a dialog from tm callback (another wrapper)
* \param t transaction, unused
* \param type type of the entered callback
* \param param saved dialog structure in the callback
*/
static void unref_dlg_from_cb(struct cell* t, int type, struct tmcb_params *param)
{
dlg_cell_t *dlg = NULL;
dlg_iuid_t *iuid = NULL;
iuid = (dlg_iuid_t*)(*param->param);
if (iuid==NULL)
return;
dlg = dlg_get_by_iuid(iuid);
if(dlg==NULL)
return;
/* unref by 2: 1 set when adding in tm cb, 1 sent by dlg_get_by_iuid() */
dlg_unref(dlg, 2);
}
/*!
*
*/
dlg_cell_t *dlg_lookup_msg_dialog(sip_msg_t *msg, unsigned int *dir)
{
dlg_cell_t *dlg = NULL;
str callid;
str ftag;
str ttag;
unsigned int vdir;
/* Retrieve the current dialog */
dlg = dlg_get_ctx_dialog();
if(dlg!=NULL) {
if(dir) {
if (pre_match_parse(msg, &callid, &ftag, &ttag, 0)<0) {
dlg_release(dlg);
return NULL;
}
if (dlg->tag[DLG_CALLER_LEG].len == ftag.len &&
strncmp(dlg->tag[DLG_CALLER_LEG].s, ftag.s, ftag.len)==0 &&
strncmp(dlg->callid.s, callid.s, callid.len)==0) {
*dir = DLG_DIR_DOWNSTREAM;
} else {
if (ttag.len>0 && dlg->tag[DLG_CALLER_LEG].len == ttag.len &&
strncmp(dlg->tag[DLG_CALLER_LEG].s, ttag.s, ttag.len)==0 &&
strncmp(dlg->callid.s, callid.s, callid.len)==0) {
*dir = DLG_DIR_UPSTREAM;
}
}
}
return dlg;
}
if (pre_match_parse(msg, &callid, &ftag, &ttag, 0)<0)
return NULL;
vdir = DLG_DIR_NONE;
dlg = get_dlg(&callid, &ftag, &ttag, &vdir);
if (dlg==NULL){
LM_DBG("dlg with callid '%.*s' not found\n",
msg->callid->body.len, msg->callid->body.s);
return NULL;
}
if(dir) *dir = vdir;
return dlg;
}
/*!
*
*/
dlg_cell_t *dlg_get_msg_dialog(sip_msg_t *msg)
{
return dlg_lookup_msg_dialog(msg, NULL);
}
/*!
* \brief Function that is registered as RR callback for dialog tracking
*
* Function that is registered as RR callback for dialog tracking. It
* sets the appropriate events after the SIP method and run the state
* machine to update the dialog state. It updates then the saved
* dialogs and also the statistics.
* \param req SIP request
* \param route_params record-route parameter
* \param param unused
*/
void dlg_onroute(struct sip_msg* req, str *route_params, void *param)
{
dlg_cell_t *dlg;
dlg_iuid_t *iuid;
str val, callid, ftag, ttag;
int h_entry, h_id, new_state, old_state, unref, event, timeout, reset;
unsigned int dir;
int ret = 0;
dlg = dlg_get_ctx_dialog();
if (dlg!=NULL) {
dlg_release(dlg);
return;
}
/* skip initial requests - they may end up here because of the
* preloaded route */
if ( (!req->to && parse_headers(req, HDR_TO_F,0)<0) || !req->to ) {
LM_ERR("bad request or missing TO hdr :-/\n");
return;
}
if ( get_to(req)->tag_value.len==0 )
return;
dlg = 0;
dir = DLG_DIR_NONE;
if ( seq_match_mode!=SEQ_MATCH_NO_ID ) {
if( d_rrb.get_route_param( req, &rr_param, &val)!=0) {
LM_DBG("Route param '%.*s' not found\n", rr_param.len,rr_param.s);
if (seq_match_mode==SEQ_MATCH_STRICT_ID )
return;
} else {
LM_DBG("route param is '%.*s' (len=%d)\n",val.len,val.s,val.len);
if ( parse_dlg_rr_param( val.s, val.s+val.len, &h_entry, &h_id)<0 )
return;
dlg = dlg_lookup(h_entry, h_id);
if (dlg==0) {
LM_WARN("unable to find dialog for %.*s "
"with route param '%.*s' [%u:%u]\n",
req->first_line.u.request.method.len,
req->first_line.u.request.method.s,
val.len,val.s, h_entry, h_id);
if (seq_match_mode==SEQ_MATCH_STRICT_ID )
return;
} else {
if (pre_match_parse( req, &callid, &ftag, &ttag, 1)<0) {
// lookup_dlg has incremented the ref count by 1
dlg_release(dlg);
return;
}
if (match_dialog( dlg, &callid, &ftag, &ttag, &dir )==0) {
LM_WARN("tight matching failed for %.*s with callid='%.*s'/%d, "
"ftag='%.*s'/%d, ttag='%.*s'/%d and direction=%d\n",
req->first_line.u.request.method.len,
req->first_line.u.request.method.s,
callid.len, callid.s, callid.len,
ftag.len, ftag.s, ftag.len,
ttag.len, ttag.s, ttag.len, dir);
LM_WARN("dialog identification elements are callid='%.*s'/%d, "
"caller tag='%.*s'/%d, callee tag='%.*s'/%d\n",
dlg->callid.len, dlg->callid.s, dlg->callid.len,
dlg->tag[DLG_CALLER_LEG].len, dlg->tag[DLG_CALLER_LEG].s,
dlg->tag[DLG_CALLER_LEG].len,
dlg->tag[DLG_CALLEE_LEG].len, dlg->tag[DLG_CALLEE_LEG].s,
dlg->tag[DLG_CALLEE_LEG].len);
// lookup_dlg has incremented the ref count by 1
dlg_release(dlg);
// Reset variables in order to do a lookup based on SIP-Elements.
dlg = 0;
dir = DLG_DIR_NONE;
if (seq_match_mode==SEQ_MATCH_STRICT_ID )
return;
}
}
}
}
if (dlg==0) {
if (pre_match_parse(req, &callid, &ftag, &ttag, 1)<0)
return;
/* TODO - try to use the RR dir detection to speed up here the
* search -bogdan */
dlg = get_dlg(&callid, &ftag, &ttag, &dir);
if (dlg==0){
LM_DBG("Callid '%.*s' not found\n",
req->callid->body.len, req->callid->body.s);
return;
}
}
/* set current dialog - re-use ref increment from dlg_get() above */
set_current_dialog( req, dlg);
_dlg_ctx.iuid.h_entry = dlg->h_entry;
_dlg_ctx.iuid.h_id = dlg->h_id;
if(dlg->iflags & DLG_IFLAG_CSEQ_DIFF) {
if(dlg_cseq_refresh(req, dlg, dir)<0) {
LM_ERR("failed to refresh cseq update\n");
}
}
if (req->first_line.u.request.method_value != METHOD_ACK) {
iuid = dlg_get_iuid_shm_clone(dlg);
if(iuid!=NULL)
{
/* register callback for the replies of this request */
if ( d_tmb.register_tmcb( req, 0, TMCB_RESPONSE_IN|TMCB_ON_FAILURE,
dlg_onreply, (void*)iuid, dlg_iuid_sfree)<0 ) {
LM_ERR("failed to register TMCB (3)\n");
shm_free(iuid);
}
iuid = NULL;
}
}
/* run state machine */
switch ( req->first_line.u.request.method_value ) {
case METHOD_PRACK:
event = DLG_EVENT_REQPRACK; break;
case METHOD_ACK:
event = DLG_EVENT_REQACK; break;
case METHOD_BYE:
event = DLG_EVENT_REQBYE; break;
default:
event = DLG_EVENT_REQ;
}
next_state_dlg( dlg, event, &old_state, &new_state, &unref);
CURR_DLG_ID = req->id;
CURR_DLG_LIFETIME = (unsigned int)(time(0))-dlg->start_ts;
CURR_DLG_STATUS = new_state;
dlg_run_event_route(dlg, req, old_state, new_state);
/* delay deletion of dialog until transaction has died off in order
* to absorb in-air messages */
if (new_state==DLG_STATE_DELETED && old_state!=DLG_STATE_DELETED) {
/* set end time */
dlg->end_ts = (unsigned int)(time(0));
iuid = dlg_get_iuid_shm_clone(dlg);
if(iuid!=NULL) {
if ( d_tmb.register_tmcb(req, NULL, TMCB_DESTROY,
unref_dlg_from_cb, (void*)iuid, dlg_iuid_sfree)<0 ) {
LM_ERR("failed to register deletion delay function\n");
shm_free(iuid);
} else {
dlg_ref(dlg, 1);
}
}
}
if (new_state==DLG_STATE_CONFIRMED && old_state!=DLG_STATE_CONFIRMED)
dlg_ka_add(dlg);
/* run actions for the transition */
if (event==DLG_EVENT_REQBYE && new_state==DLG_STATE_DELETED &&
old_state!=DLG_STATE_DELETED) {
LM_DBG("BYE successfully processed\n");
/* remove from timer */
ret = remove_dialog_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->tag[DLG_CALLER_LEG].len, dlg->tag[DLG_CALLER_LEG].s,
dlg->tag[DLG_CALLEE_LEG].len, dlg->tag[DLG_CALLEE_LEG].s);
} else if (ret > 0) {
LM_WARN("inconsitent dlg timer data 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->tag[DLG_CALLER_LEG].len, dlg->tag[DLG_CALLER_LEG].s,
dlg->tag[DLG_CALLEE_LEG].len, dlg->tag[DLG_CALLEE_LEG].s);
} else {
/* one extra unref due to removal from timer list */
unref++;
}
/* dialog terminated (BYE) */
dlg_terminated( req, dlg, dir);
dlg_unref(dlg, unref);
_dlg_ctx.cpid = my_pid();
_dlg_ctx.expect_t = 1;
dlg_set_ctx_iuid(dlg);
if_update_stat( dlg_enable_stats, active_dlgs, -1);
goto done;
}
if ( (event==DLG_EVENT_REQ || event==DLG_EVENT_REQACK)
&& (new_state==DLG_STATE_CONFIRMED || new_state==DLG_STATE_EARLY)) {
timeout = get_dlg_timeout(req);
if (timeout!=default_timeout) {
dlg->lifetime = timeout;
}
reset = !((dlg->iflags & DLG_IFLAG_TIMER_NORESET) || dlg_timeout_noreset);
if ((new_state!=DLG_STATE_EARLY) && (old_state!=DLG_STATE_CONFIRMED || reset)) {
if (update_dlg_timer( &dlg->tl, dlg->lifetime )==-1) {
LM_ERR("failed to update dialog lifetime\n");
} else {
dlg->dflags |= DLG_FLAG_CHANGED;
}
}
if(event != DLG_EVENT_REQACK) {
if(dlg_refresh_contacts(dlg, req, dir)!=0) {
LM_ERR("contacts update failed\n");
} else {
dlg->dflags |= DLG_FLAG_CHANGED;
}
if(update_cseqs(dlg, req, dir)!=0) {
LM_ERR("cseqs update failed\n");
} else {
dlg->dflags |= DLG_FLAG_CHANGED;
}
}
if(dlg_db_mode==DB_MODE_REALTIME && (dlg->dflags&DLG_FLAG_CHANGED)) {
update_dialog_dbinfo(dlg);
}
if (old_state==DLG_STATE_CONFIRMED_NA) {
LM_DBG("confirming ACK successfully processed\n");
/* confirming ACK request */
run_dlg_callbacks( DLGCB_CONFIRMED, dlg, req, NULL, dir, 0);
} else {
LM_DBG("sequential request successfully processed\n");
/* within dialog request */
run_dlg_callbacks( DLGCB_REQ_WITHIN, dlg, req, NULL, dir, 0);
if (add_dlg_rr_param( req, dlg->h_entry, dlg->h_id)<0 ) {
LM_ERR("failed to add RR param\n");
goto done;
}
if ( (event!=DLG_EVENT_REQACK) &&
(dlg->cbs.types)&DLGCB_RESPONSE_WITHIN ) {
iuid = dlg_get_iuid_shm_clone(dlg);
if(iuid!=NULL)
{
/* register callback for the replies of this request */
if ( d_tmb.register_tmcb( req, 0, TMCB_RESPONSE_FWDED,
(dir==DLG_DIR_UPSTREAM)?dlg_seq_down_onreply:
dlg_seq_up_onreply,
(void*)iuid, dlg_iuid_sfree)<0 ) {
LM_ERR("failed to register TMCB (2)\n");
shm_free(iuid);
}
}
}
}
}
if(new_state==DLG_STATE_CONFIRMED && old_state==DLG_STATE_CONFIRMED_NA){
dlg->dflags |= DLG_FLAG_CHANGED;
if(dlg_db_mode == DB_MODE_REALTIME)
update_dialog_dbinfo(dlg);
}
done:
dlg_release(dlg);
return;
}
/*!
* \brief Timer function that removes expired dialogs, run timeout route
* \param tl dialog timer list
*/
void dlg_ontimeout(struct dlg_tl *tl)
{
dlg_cell_t *dlg;
int new_state, old_state, unref;
sip_msg_t *fmsg;
void* timeout_cb = 0;
/* get the dialog tl payload */
dlg = ((struct dlg_cell*)((char *)(tl) -
(unsigned long)(&((struct dlg_cell*)0)->tl)));
/* mark dialog as expired */
dlg->dflags |= DLG_FLAG_EXPIRED;
if(dlg->state==DLG_STATE_CONFIRMED_NA
|| dlg->state==DLG_STATE_CONFIRMED)
{
if(dlg->toroute>0 && dlg->toroute<main_rt.entries
&& main_rt.rlist[dlg->toroute]!=NULL)
{
fmsg = faked_msg_next();
if (exec_pre_script_cb(fmsg, REQUEST_CB_TYPE)>0)
{
dlg_ref(dlg, 1);
dlg_set_ctx_iuid(dlg);
LM_DBG("executing route %d on timeout\n", dlg->toroute);
set_route_type(REQUEST_ROUTE);
run_top_route(main_rt.rlist[dlg->toroute], fmsg, 0);
dlg_reset_ctx_iuid();
exec_post_script_cb(fmsg, REQUEST_CB_TYPE);
dlg_unref(dlg, 1);
}
}
if(dlg->iflags&DLG_IFLAG_TIMEOUTBYE)
{
/* set the dialog context so that it's available in
* tm:local-request event route */
dlg_set_ctx_iuid(dlg);
if(dlg_bye_all(dlg, NULL)<0)
dlg_unref(dlg, 1);
dlg_reset_ctx_iuid();
dlg_unref(dlg, 1);
if_update_stat(dlg_enable_stats, expired_dlgs, 1);
return;
}
}
next_state_dlg( dlg, DLG_EVENT_REQBYE, &old_state, &new_state, &unref);
/* used for computing duration for timed out acknowledged dialog */
if (DLG_STATE_CONFIRMED == old_state) {
timeout_cb = (void *)CONFIRMED_DIALOG_STATE;
}
dlg_run_event_route(dlg, NULL, old_state, new_state);
if (new_state==DLG_STATE_DELETED && old_state!=DLG_STATE_DELETED) {
LM_WARN("timeout for dlg with CallID '%.*s' and tags '%.*s' '%.*s'\n",
dlg->callid.len, dlg->callid.s,
dlg->tag[DLG_CALLER_LEG].len, dlg->tag[DLG_CALLER_LEG].s,
dlg->tag[DLG_CALLEE_LEG].len, dlg->tag[DLG_CALLEE_LEG].s);
/* set end time */
dlg->end_ts = (unsigned int)(time(0));
/* dialog timeout */
run_dlg_callbacks( DLGCB_EXPIRED, dlg, NULL, NULL, DLG_DIR_NONE, timeout_cb);
dlg_unref(dlg, unref+1);
if_update_stat( dlg_enable_stats, expired_dlgs, 1);
if_update_stat( dlg_enable_stats, active_dlgs, -1);
} else {
dlg_unref(dlg, 1);
}
return;
}
/*!
* \brief Function that returns the dialog lifetime as pseudo-variable
* \param msg SIP message
* \param param pseudo-variable parameter
* \param res pseudo-variable result
* \return 0 on success, -1 on failure
*/
int pv_get_dlg_lifetime(struct sip_msg *msg, pv_param_t *param, pv_value_t *res)
{
int l = 0;
char *ch = NULL;
if(msg==NULL || res==NULL)
return -1;
if (CURR_DLG_ID!=msg->id)
return pv_get_null( msg, param, res);
res->ri = CURR_DLG_LIFETIME;
ch = int2str( (unsigned long)res->ri, &l);
res->rs.s = ch;
res->rs.len = l;
res->flags = PV_VAL_STR|PV_VAL_INT|PV_TYPE_INT;
return 0;
}
/*!
* \brief Function that returns the dialog state as pseudo-variable
* \param msg SIP message
* \param param pseudo-variable parameter
* \param res pseudo-variable result
* \return 0 on success, -1 on failure
*/
int pv_get_dlg_status(struct sip_msg *msg, pv_param_t *param, pv_value_t *res)
{
int l = 0;
char *ch = NULL;
if(msg==NULL || res==NULL)
return -1;
if (CURR_DLG_ID!=msg->id)
return pv_get_null( msg, param, res);
res->ri = CURR_DLG_STATUS;
ch = int2str( (unsigned long)res->ri, &l);
res->rs.s = ch;
res->rs.len = l;
res->flags = PV_VAL_STR|PV_VAL_INT|PV_TYPE_INT;
return 0;
}
/*!
* \brief Execute event routes based on new state
*
*/
void dlg_run_event_route(dlg_cell_t *dlg, sip_msg_t *msg, int ostate, int nstate)
{
sip_msg_t *fmsg;
int rt;
int bkroute;
if(dlg==NULL)
return;
if(ostate==nstate)
return;
rt = -1;
if(nstate==DLG_STATE_CONFIRMED_NA) {
rt = dlg_event_rt[DLG_EVENTRT_START];
} else if(nstate==DLG_STATE_DELETED) {
if(ostate==DLG_STATE_CONFIRMED || ostate==DLG_STATE_CONFIRMED_NA)
rt = dlg_event_rt[DLG_EVENTRT_END];
else if(ostate==DLG_STATE_UNCONFIRMED || ostate==DLG_STATE_EARLY)
rt = dlg_event_rt[DLG_EVENTRT_FAILED];
}
if(rt==-1 || event_rt.rlist[rt]==NULL)
return;
if(msg==NULL)
fmsg = faked_msg_next();
else
fmsg = msg;
if (exec_pre_script_cb(fmsg, LOCAL_CB_TYPE)>0)
{
dlg_ref(dlg, 1);
dlg_set_ctx_iuid(dlg);
LM_DBG("executing event_route %d on state %d\n", rt, nstate);
bkroute = get_route_type();
set_route_type(LOCAL_ROUTE);
run_top_route(event_rt.rlist[rt], fmsg, 0);
dlg_reset_ctx_iuid();
exec_post_script_cb(fmsg, LOCAL_CB_TYPE);
dlg_unref(dlg, 1);
set_route_type(bkroute);
}
}
int dlg_manage(sip_msg_t *msg)
{
str tag;
int backup_mode;
dlg_cell_t *dlg = NULL;
tm_cell_t *t = NULL;
if( (msg->to==NULL && parse_headers(msg, HDR_TO_F,0)<0) || msg->to==NULL )
{
LM_ERR("bad TO header\n");
return -1;
}
tag = get_to(msg)->tag_value;
if(tag.s!=0 && tag.len!=0)
{
backup_mode = seq_match_mode;
seq_match_mode = SEQ_MATCH_NO_ID;
dlg_onroute(msg, NULL, NULL);
seq_match_mode = backup_mode;
} else {
t = d_tmb.t_gett();
if(t==T_UNDEFINED)
t = NULL;
if(dlg_new_dialog(msg, t, initial_cbs_inscript)!=0)
return -1;
dlg = dlg_get_ctx_dialog();
if(dlg==NULL)
return -1;
if(t!=NULL) {
dlg_set_tm_callbacks(t, msg, dlg, spiral_detected);
_dlg_ctx.t = 1;
LM_DBG("dialog created on existing transaction\n");
} else {
LM_DBG("dialog created before transaction\n");
}
dlg_release(dlg);
}
return 1;
}
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