void dlg_ping_routine(unsigned int ticks , void * attr)
{
struct dlg_ping_list *expired,*it,*curr;
struct dlg_cell *dlg;
expired = get_timeout_dlgs();
it = expired;
while (it) {
dlg = it->dlg;
LM_DBG("dialog %p has expired\n",dlg);
curr = it->next;
shm_free(it);
dlg->pl = 0;
it = curr;
/* no longer reffed in list */
unref_dlg(dlg,1);
/* dlg is still reffed in TM callback. deletion from memory
* will happen only on 408 timeout */
/* FIXME - maybe better not to send BYE both ways as we know for sure one
* end in down . */
dlg_end_dlg(dlg,0);
}
/* ping_timer->first now contains all active dialogs */
it = ping_timer->first;
while (it) {
dlg = it->dlg;
/* do not ping ended dialogs */
if (dlg->state != DLG_STATE_DELETED) {
if (dlg->flags & DLG_FLAG_PING_CALLER) {
ref_dlg(dlg,1);
if (send_leg_msg(dlg,&options_str,callee_idx(dlg),
DLG_CALLER_LEG,0,0,reply_from_caller,dlg,unref_dlg_cb) < 0) {
LM_ERR("failed to ping caller\n");
unref_dlg(dlg,1);
}
}
if (dlg->flags & DLG_FLAG_PING_CALLEE) {
ref_dlg(dlg,1);
if (send_leg_msg(dlg,&options_str,DLG_CALLER_LEG,
callee_idx(dlg),0,0,reply_from_callee,dlg,unref_dlg_cb) < 0) {
LM_ERR("failed to ping callee\n");
unref_dlg(dlg,1);
}
}
}
it = it->next;
}
}
/*!
* \brief Register a transaction on a dialog
* \param t transaction
* \param type type of the entered callback
* \param param saved dialog structure in the callback
*/
static int store_dlg_in_tm(struct sip_msg* msg,
struct cell* t,
struct dlg_cell *dlg) {
if (!msg || msg == FAKED_REPLY || !t || !dlg) {
LM_ERR("invalid parameter msg(%p), t(%p), dlg(%p)\n", msg, t, dlg);
return -1;
}
if (get_dialog_from_tm(t)) {
LM_NOTICE("dialog %p is already set for this transaction!\n", dlg);
return 1;
}
// facilitate referencing of dialog through TMCB_MAX
if (d_tmb.register_tmcb(msg,
t,
TMCB_MAX,
dlg_tmcb_dummy,
(void*) dlg, unreference_dialog) < 0) {
LM_ERR("failed cache in T the shortcut to dlg %p\n", dlg);
return -3;
}
// registering succeeded, we must increase the reference counter
ref_dlg(dlg, 1);
return 0;
}
/* cell- pointer to a struct dlg_cell
* leg - a dialog leg to be BYE'ed :
* = 0: caller leg
* > 0: callee legs
*/
static inline int send_leg_bye(struct dlg_cell *cell, int dst_leg, int src_leg,
str *extra_hdrs)
{
context_p old_ctx;
context_p *new_ctx;
dlg_t* dialog_info;
str met = {"BYE", 3};
int result;
if ((dialog_info = build_dlg_t(cell, dst_leg, src_leg)) == 0){
LM_ERR("failed to create dlg_t\n");
goto err;
}
LM_DBG("sending BYE to %s (%d)\n",
(dst_leg==DLG_CALLER_LEG)?"caller":"callee", dst_leg);
/* set new processing context */
if (push_new_processing_context( cell, &old_ctx, &new_ctx, NULL)!=0)
goto err;
ctx_lastdstleg_set(dst_leg);
ref_dlg(cell, 1);
result = d_tmb.t_request_within
(&met, /* method*/
extra_hdrs, /* extra headers*/
NULL, /* body*/
dialog_info, /* dialog structure*/
bye_reply_cb, /* callback function*/
(void*)cell, /* callback parameter*/
NULL); /* release function*/
/* reset the processing contect */
if (current_processing_ctx == NULL)
*new_ctx = NULL;
else
context_destroy(CONTEXT_GLOBAL, *new_ctx);
current_processing_ctx = old_ctx;
if(result < 0){
LM_ERR("failed to send the BYE request\n");
goto err1;
}
free_tm_dlg(dialog_info);
LM_DBG("BYE sent to %s\n", (dst_leg==DLG_CALLER_LEG)?"caller":"callee");
return 0;
err1:
unref_dlg(cell, 1);
err:
return -1;
}
int dlg_th_onroute(struct dlg_cell *dlg, struct sip_msg *req, int dir)
{
struct hdr_field *it;
char* buf = req->buf;
/* delete vias */
if(dlg_del_vias(req) < 0) {
LM_ERR("Failed to remove via headers\n");
return -1;
}
/* delete record route */
for (it=req->record_route;it;it=it->sibling) {
if (del_lump(req, it->name.s - buf, it->len,HDR_RECORDROUTE_T) == 0) {
LM_ERR("del_lump failed\n");
return -1;
}
LM_DBG("Delete record route: [%.*s]\n", it->len, it->name.s);
}
/* add route headers */
fix_route_dialog(req, dlg);
/* replace contact*/
if(dlg_replace_contact(req, dlg) < 0) {
LM_ERR("Failed to replace contact\n");
return -1;
}
/* register tm callback for response in */
ref_dlg( dlg , 1);
if ( d_tmb.register_tmcb( req, 0, TMCB_RESPONSE_FWDED,
(dir==DLG_DIR_UPSTREAM)?dlg_th_down_onreply:dlg_th_up_onreply,
(void*)dlg, unreference_dialog)<0 ) {
LM_ERR("failed to register TMCB\n");
unref_dlg( dlg , 1);
}
if (dir == DLG_DIR_UPSTREAM) {
/* destination leg is the caller - force the send socket
* as the one the caller was inited from */
req->force_send_socket = dlg->legs[DLG_CALLER_LEG].bind_addr;
LM_DBG("forcing send socket for req going to caller\n");
} else {
/* destination leg is the callee - force the send socket
* as the one the callee was inited from */
req->force_send_socket = dlg->legs[callee_idx(dlg)].bind_addr;
LM_DBG("forcing send socket for req going to callee\n");
}
return 0;
}
/* cell- pointer to a struct dlg_cell
* leg - a dialog leg to be BYE'ed :
* = 0: caller leg
* > 0: callee legs
*/
static inline int send_leg_bye(struct dlg_cell *cell, int dst_leg, int src_leg,
str *extra_hdrs)
{
dlg_t* dialog_info;
struct dlg_cell *old_cell;
str met = {"BYE", 3};
int result;
if ((dialog_info = build_dlg_t(cell, dst_leg, src_leg)) == 0){
LM_ERR("failed to create dlg_t\n");
goto err;
}
LM_DBG("sending BYE to %s (%d)\n",
(dst_leg==DLG_CALLER_LEG)?"caller":"callee", dst_leg);
ref_dlg(cell, 1);
old_cell = current_dlg_pointer;
current_dlg_pointer = cell;
result = d_tmb.t_request_within
(&met, /* method*/
extra_hdrs, /* extra headers*/
NULL, /* body*/
dialog_info, /* dialog structure*/
bye_reply_cb, /* callback function*/
(void*)cell, /* callback parameter*/
NULL); /* release function*/
current_dlg_pointer = old_cell;
if(result < 0){
LM_ERR("failed to send the BYE request\n");
goto err1;
}
free_tm_dlg(dialog_info);
LM_DBG("BYE sent to %s\n", (dst_leg==DLG_CALLER_LEG)?"caller":"callee");
return 0;
err1:
unref_dlg(cell, 1);
err:
return -1;
}
int dlg_th_onroute(struct dlg_cell *dlg, struct sip_msg *req, int dir)
{
struct hdr_field *it;
char* buf = req->buf;
int leg_id;
if(dir == DLG_DIR_UPSTREAM)
leg_id = callee_idx(dlg);
else
leg_id = DLG_CALLER_LEG;
/* delete vias */
if(dlg_save_del_vias(req, &dlg->legs[leg_id]) < 0) {
LM_ERR("Failed to save and remove via headers\n");
return -1;
}
/* delete record route */
for (it=req->record_route;it;it=it->sibling) {
if (del_lump(req, it->name.s - buf, it->len,HDR_RECORDROUTE_T) == 0) {
LM_ERR("del_lump failed \n");
return -1;
}
LM_DBG("Delete record route: [%.*s]\n", it->len, it->name.s);
}
/* add route headers */
fix_route_dialog(req, dlg);
/* replace contact*/
if(dlg_replace_contact(req, dlg) < 0) {
LM_ERR("Failed to replace contact\n");
return -1;
}
/* register tm callback for response in */
ref_dlg( dlg , 1);
if ( d_tmb.register_tmcb( req, 0, TMCB_RESPONSE_FWDED,
(dir==DLG_DIR_UPSTREAM)?dlg_th_down_onreply:dlg_th_up_onreply,
(void*)dlg, unreference_dialog)<0 ) {
LM_ERR("failed to register TMCB\n");
unref_dlg( dlg , 1);
}
return 0;
}
/* cell- pointer to a struct dlg_cell
* dir- direction: the request will be sent to:
* DLG_CALLER_LEG (0): caller
* DLG_CALLEE_LEG (1): callee
*/
static inline int send_bye(struct dlg_cell * cell, int dir, str *hdrs) {
uac_req_t uac_r;
dlg_t* dialog_info;
str met = {"BYE", 3};
int result;
/* do not send BYE request for non-confirmed dialogs (not supported) */
if (cell->state != DLG_STATE_CONFIRMED) {
LM_ERR("terminating only 1 side of non-confirmed dialogs not supported by this function\n");
return -1;
}
/*verify direction*/
if ((dialog_info = build_dlg_t(cell, dir)) == 0) {
LM_ERR("failed to create dlg_t\n");
goto err;
}
LM_DBG("sending BYE to %s\n", (dir == DLG_CALLER_LEG) ? "caller" : "callee");
ref_dlg(cell, 1);
memset(&uac_r, '\0', sizeof (uac_req_t));
set_uac_req(&uac_r, &met, hdrs, NULL, dialog_info, TMCB_LOCAL_COMPLETED,
bye_reply_cb, (void*) cell);
result = d_tmb.t_request_within(&uac_r);
if (result < 0) {
LM_ERR("failed to send the BYE request\n");
goto err1;
}
free_tm_dlg(dialog_info);
LM_DBG("BYE sent to %s\n", (dir == 0) ? "caller" : "callee");
return 0;
err1:
unref_dlg(cell, 1);
err:
if (dialog_info)
free_tm_dlg(dialog_info);
return -1;
}
void dlg_onreq(struct cell* t, int type, struct tmcb_params *param)
{
/* is the dialog already created? */
if (current_dlg_pointer!=NULL) {
/* new, un-initialized dialog ? */
if ( current_dlg_pointer->flags & DLG_FLAG_ISINIT ) {
/* fully init dialog -> check if attached to the transaction */
if (t->dialog_ctx==NULL) {
/* set a callback to remove the ref when transaction
* is destroied */
if ( d_tmb.register_tmcb( NULL, t, TMCB_TRANS_DELETED,
tmcb_unreference_dialog, (void*)current_dlg_pointer, NULL)<0){
LM_ERR("failed to register TMCB\n");
return;
}
/* and attached the dialog to the transaction */
t->dialog_ctx = (void*)current_dlg_pointer;
/* and keep a reference on it */
ref_dlg( current_dlg_pointer , 1);
}
return;
}
/* dialog was previously created by create_dialog()
-> just do the last settings */
run_create_callbacks( current_dlg_pointer, param->req);
LM_DBG("t hash_index = %u, t label = %u\n",t->hash_index,t->label);
current_dlg_pointer->initial_t_hash_index = t->hash_index;
current_dlg_pointer->initial_t_label = t->label;
current_dlg_pointer->lifetime = get_dlg_timeout(param->req);
t->dialog_ctx = (void*)current_dlg_pointer;
/* dialog is fully initialized */
current_dlg_pointer->flags |= DLG_FLAG_ISINIT;
}
}
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( trans->dialog_ctx, 1);
ctx_dialog_set(trans->dialog_ctx);
}
return (struct dlg_cell*)trans->dialog_ctx;
}
/*!
* \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) {
struct dlg_cell *dlg;
struct dlg_cell_out *dlg_out = 0;
int new_state, old_state, unref, event;
str to_tag, to_uri;
struct sip_msg *req = param->req;
struct sip_msg *rpl = param->rpl;
struct dlg_entry_out* dlg_entry_out = 0;
if (t && t->fwded_totags)
LM_DBG("ONREPLY CALL_BACK from TM received and type is [%i] and TO is [%.*s]\n", type, t->fwded_totags->tag.len, t->fwded_totags->tag.s);
else
LM_DBG("ONREPLY CALL_BACK from TM received and type is [%i]\n", type);
dlg = (struct dlg_cell *) (*param->param);
if (shutdown_done || dlg == 0)
return;
if (t) {
dlg->transaction = t;
}
LM_DBG("DLG dialogid is entry:id [%i:%i]\n", dlg->h_entry, dlg->h_id);
if (type == TMCB_RESPONSE_FWDED) {
// The state does not change, but the msg is mutable in this callback
LM_DBG("TMCB_RESPONSE_FWDED from TM received");
run_dlg_callbacks(DLGCB_RESPONSE_FWDED, dlg, req, rpl, DLG_DIR_UPSTREAM, 0);
return;
}
if (type == TMCB_RESPONSE_OUT) {
LM_DBG("TMCB_RESPONSE_OUT\n");
return;
}
if (type == TMCB_RESPONSE_READY) {
if (rpl == FAKED_REPLY) {
LM_DBG("Faked reply\n");
return;
}
// get to tag
LM_DBG("Extracting to-tag from reply");
if (!rpl->to && ((parse_headers(rpl, HDR_TO_F, 0) < 0) || !rpl->to)) {
LM_ERR("bad reply or missing TO hdr :-/\n");
to_tag.s = 0;
to_tag.len = 0;
} else {
//populate to uri for this branch.
to_uri = get_to(rpl)->uri;
to_tag = get_to(rpl)->tag_value;
if (to_tag.s == 0 || to_tag.len == 0) {
LM_ERR("missing TAG param in TO hdr :-/\n");
to_tag.s = 0;
to_tag.len = 0;
//Here we assume that the transaction module timer will remove any early dialogs
return;
}
}
LM_DBG("Got to-tag from response: %.*s \n", to_tag.len, to_tag.s);
}
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;
LM_DBG("Calling next_state_dlg and event is %i\n", event);
next_state_dlg(dlg, event, &old_state, &new_state, &unref, &to_tag);
if (type == TMCB_RESPONSE_READY) {
LM_DBG("Checking if there is an existing dialog_out entry with same to-tag");
dlg_entry_out = &dlg->dlg_entry_out;
lock_get(dlg->dlg_out_entries_lock);
dlg_out = dlg_entry_out->first;
LM_DBG("Scanning dlg_entry_out list for dlg_out");
while (dlg_out) {
//Check if there is an already dialog_out entry with same To-tag
if (dlg_out->to_tag.len == to_tag.len &&
memcmp(dlg_out->to_tag.s, to_tag.s, dlg_out->to_tag.len) == 0) {
//Found a dialog_out entry with same to_tag!
LM_DBG("Found dlg_out for to-tag: %.*s\n", dlg_out->to_tag.len, dlg_out->to_tag.s);
break;
}
dlg_out = dlg_out->next;
}
lock_release(dlg->dlg_out_entries_lock);
if (!dlg_out) {
LM_DBG("No dlg_out entry found - creating a new dialog_out entry on dialog [%p]\n", dlg);
dlg_out = build_new_dlg_out(dlg, &to_uri, &to_tag);
link_dlg_out(dlg, dlg_out, 0);
/* save callee's cseq, caller cseq, callee contact and callee record route*/
if (populate_leg_info(dlg, rpl, t, DLG_CALLEE_LEG, &to_tag) != 0) {
LM_ERR("could not add further info to the dlg out\n");
}
if (!dlg_out) {
LM_ERR("failed to create new dialog out structure\n");
//TODO do something on this error!
}
} else {
//This dlg_out already exists, update cseq and contact if present
LM_DBG("dlg_out entry found - updating cseq's for dialog out [%p] for to-tag [%.*s] \n", dlg_out, dlg_out->to_tag.len, dlg_out->to_tag.s);
if ((!rpl->cseq && parse_headers(rpl, HDR_CSEQ_F, 0) < 0) || !rpl->cseq ||
!rpl->cseq->parsed) {
LM_ERR("bad sip message or missing CSeq hdr :-/\n");
}
dlg_update_cseq(dlg, DLG_CALLEE_LEG, &((get_cseq(rpl))->number), &(dlg_out->to_tag));
/* extract the contact address to update if present*/
if (!rpl->contact && (parse_headers(rpl, HDR_CONTACT_F, 0) < 0 || !rpl->contact)) {
LM_ERR("Can not update callee contact: bad sip message or missing Contact hdr\n");
}
else if (parse_contact(rpl->contact) < 0 ||
((contact_body_t *) rpl->contact->parsed)->contacts == NULL ||
((contact_body_t *) rpl->contact->parsed)->contacts->next != NULL) {
LM_ERR("Can not update callee contact: bad Contact HDR\n");
}
else
{
str contact;
contact = ((contact_body_t *) rpl->contact->parsed)->contacts->uri;
dlg_update_contact(dlg, DLG_CALLEE_LEG, &contact, &(dlg_out->to_tag));
}
}
}
if (new_state == DLG_STATE_EARLY) {
run_dlg_callbacks(DLGCB_EARLY, dlg, req, rpl, DLG_DIR_UPSTREAM, 0);
return;
}
LM_DBG("new state is %i and old state is %i\n", new_state, old_state);
if ((new_state == DLG_STATE_CONFIRMED) && (event == DLG_EVENT_RPL2xx)) {
LM_DBG("dialog %p confirmed \n", dlg);
//Remove all the other entries in dialog_out for the same dialog after TM expires the transaction
//(not before in order to absorb late in-early-dialog requests).
//remove all other dlg_out objects
if (dlg_out) {
if (d_tmb.register_tmcb(req, NULL, TMCB_DESTROY, unlink_dlgouts_from_cb, (void*) dlg, NULL) < 0) {
LM_ERR("failed to register deletion delay function\n");
LM_DBG("Removing all other DLGs");
dlg_remove_dlg_out(dlg_out, dlg, 0);
} else {
//mark the outs for deletion
dlg_remove_dlg_out(dlg_out, dlg, 1);
}
} else {
LM_ERR("There is no dlg_out structure - this is bad\n");
//TODO: add error handling here
}
/* 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 (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' \n",
dlg, dlg->h_entry, dlg->h_id, event, old_state, new_state,
dlg->callid.len, dlg->callid.s,
dlg->from_tag.len, dlg->from_tag.s);
} else {
ref_dlg(dlg, 1);
}
run_dlg_callbacks(DLGCB_CONFIRMED, dlg, req, rpl, DLG_DIR_UPSTREAM, 0);
if (unref) unref_dlg(dlg, unref);
return;
}
if (new_state == DLG_STATE_CONCURRENTLY_CONFIRMED && (old_state == DLG_STATE_CONFIRMED || old_state == DLG_STATE_CONCURRENTLY_CONFIRMED)) {
//This is a concurrently confirmed call
LM_DBG("This is a concurrently confirmed call.");
//Create a new Dialog ID token “X”
//Not sure how to do this so just going to use existing Did and add an X character to it
str new_did;
create_concurrent_did(dlg, &new_did);
//assign new did to the created or updated dialog_out entry.
update_dlg_out_did(dlg_out, &new_did);
//Then, duplicate the dialog_in entry and set its Dialog ID value to new_did
//for now rather just create new dlg structure with the correct params - this should be fixed if future use requires
struct dlg_cell *new_dlg = 0;
new_dlg = build_new_dlg(&(dlg->callid) /*callid*/,
&(dlg->from_uri) /*from uri*/,
&(dlg->from_tag)/*from_tag*/,
&(dlg->req_uri) /*r-uri*/);
//assign new did to dlg_in
update_dlg_did(new_dlg, &new_did);
if (new_dlg == 0) {
LM_ERR("failed to create new dialog\n");
return;
}
//link the new_dlg with dlg_out object
link_dlg_out(new_dlg, dlg_out, 0);
}
if (old_state != DLG_STATE_DELETED && new_state == DLG_STATE_DELETED) {
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);
/* do unref */
if (unref)
unref_dlg(dlg, unref);
return;
}
if (unref) unref_dlg(dlg, unref);
return;
}
/*!
* \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) {
struct dlg_cell *dlg;
str val, callid, ftag, ttag;
int h_entry, h_id, new_state, old_state, unref, event, timeout;
unsigned int dir;
int ret = 0;
if (current_dlg_pointer != NULL)
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 = lookup_dlg(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
unref_dlg(dlg, 1);
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\n",
dlg->callid.len, dlg->callid.s, dlg->callid.len,
dlg->from_tag.len, dlg->from_tag.s,
dlg->from_tag.len);
// lookup_dlg has incremented the ref count by 1
unref_dlg(dlg, 1);
// 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) {
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.dlg = dlg;
if (d_tmb.register_tmcb(req, NULL, TMCB_REQUEST_FWDED,
store_dlg_in_tm_cb, (void*) dlg, NULL) < 0) {
LM_ERR("failed to store dialog in transaction during dialog creation for later reference\n");
}
/* 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, 0);
LM_DBG("unref after next state is %i\n", unref);
CURR_DLG_ID = req->id;
CURR_DLG_LIFETIME = (unsigned int) (time(0)) - dlg->start_ts;
CURR_DLG_STATUS = new_state;
/* 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'\n",
dlg, dlg->h_entry, dlg->h_id,
dlg->callid.len, dlg->callid.s,
dlg->from_tag.len, dlg->from_tag.s);
} else if (ret > 0) {
LM_WARN("inconsitent dlg timer data on dlg %p [%u:%u] "
"with clid '%.*s' and tags '%.*s' \n",
dlg, dlg->h_entry, dlg->h_id,
dlg->callid.len, dlg->callid.s,
dlg->from_tag.len, dlg->from_tag.s);
} else {
unref++;
}
/* dialog terminated (BYE) */
dlg_terminated(req, dlg, dir);
unref_dlg(dlg, unref);
return;
}
if ((event == DLG_EVENT_REQ || event == DLG_EVENT_REQACK)
&& new_state == DLG_STATE_CONFIRMED) {
timeout = get_dlg_timeout(req);
if (timeout != default_timeout) {
dlg->lifetime = timeout;
}
if (update_dlg_timer(&dlg->tl, dlg->lifetime) == -1) {
LM_ERR("failed to update dialog lifetime\n");
}
if (update_cseqs(dlg, req, dir, &ttag) != 0) {
LM_ERR("cseqs update failed\n");
} else {
dlg->dflags |= DLG_FLAG_CHANGED;
}
if (old_state != DLG_STATE_CONFIRMED) {
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 ((event != DLG_EVENT_REQACK) &&
(dlg->cbs.types) & DLGCB_RESPONSE_WITHIN) {
/* ref the dialog as registered into the transaction callback.
* unref will be done when the callback will be destroyed */
ref_dlg(dlg, 1);
/* 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*) dlg, unreference_dialog) < 0) {
LM_ERR("failed to register TMCB (2)\n");
unref_dlg(dlg, 1);
}
}
}
}
if (new_state == DLG_STATE_CONFIRMED && old_state != DLG_STATE_CONFIRMED) {
dlg->dflags |= DLG_FLAG_CHANGED;
}
return;
}
/**
* replicates the remote update of an ongoing dialog locally
* by reading the relevant information using the Binary Packet Interface
*/
int dlg_replicated_update(bin_packet_t *packet)
{
struct dlg_cell *dlg;
str call_id, from_tag, to_tag, from_uri, to_uri, vars, profiles;
unsigned int dir, dst_leg;
int timeout, h_entry;
str st;
struct dlg_entry *d_entry;
int rcv_flags, save_new_flag;
bin_pop_str(packet, &call_id);
bin_pop_str(packet, &from_tag);
bin_pop_str(packet, &to_tag);
bin_pop_str(packet, &from_uri);
bin_pop_str(packet, &to_uri);
LM_DBG("replicated update for ['%.*s' '%.*s' '%.*s' '%.*s' '%.*s']\n",
call_id.len, call_id.s, from_tag.len, from_tag.s, to_tag.len, to_tag.s,
from_uri.len, from_uri.s, to_uri.len, to_uri.s);
dlg = get_dlg(&call_id, &from_tag, &to_tag, &dir, &dst_leg);
h_entry = dlg_hash(&call_id);
d_entry = &d_table->entries[h_entry];
dlg_lock(d_table, d_entry);
if (!dlg) {
LM_DBG("dialog not found, building new\n");
dlg = build_new_dlg(&call_id, &from_uri, &to_uri, &from_tag);
if (!dlg) {
LM_ERR("Failed to create replicated dialog!\n");
goto error;
}
return dlg_replicated_create(packet ,dlg, &from_tag, &to_tag, 0);
}
bin_skip_int(packet, 2);
bin_pop_int(packet, &dlg->state);
bin_skip_str(packet, 2);
bin_pop_str(packet, &st);
if (dlg_update_cseq(dlg, DLG_CALLER_LEG, &st, 0) != 0) {
LM_ERR("failed to update caller cseq\n");
goto error;
}
bin_pop_str(packet, &st);
if (dlg_update_cseq(dlg, callee_idx(dlg), &st, 0) != 0) {
LM_ERR("failed to update callee cseq\n");
goto error;
}
bin_skip_str(packet, 6);
bin_pop_str(packet, &vars);
bin_pop_str(packet, &profiles);
bin_pop_int(packet, &dlg->user_flags);
bin_pop_int(packet, &dlg->mod_flags);
bin_pop_int(packet, &rcv_flags);
/* make sure an update received immediately after a create can't
* incorrectly erase the DLG_FLAG_NEW before locally writing to DB */
save_new_flag = dlg->flags & DLG_FLAG_NEW;
dlg->flags = rcv_flags;
dlg->flags |= ((save_new_flag ? DLG_FLAG_NEW : 0) | DLG_FLAG_CHANGED);
bin_pop_int(packet, &timeout);
bin_skip_int(packet, 2);
timeout -= time(0);
LM_DBG("Received updated timeout of %d for dialog %.*s\n",
timeout, call_id.len, call_id.s);
if (dlg->lifetime != timeout) {
dlg->lifetime = timeout;
switch (update_dlg_timer(&dlg->tl, dlg->lifetime) ) {
case -1:
LM_ERR("failed to update dialog lifetime!\n");
/* continue */
case 0:
/* timeout value was updated */
break;
case 1:
/* dlg inserted in timer list with new expire (reference it)*/
ref_dlg(dlg,1);
}
}
unref_dlg_unsafe(dlg, 1, d_entry);
if (vars.s && vars.len != 0)
read_dialog_vars(vars.s, vars.len, dlg);
dlg->flags |= DLG_FLAG_VP_CHANGED;
dlg_unlock(d_table, d_entry);
if (profiles.s && profiles.len != 0)
read_dialog_profiles(profiles.s, profiles.len, dlg, 1, 1);
return 0;
error:
dlg_unlock(d_table, d_entry);
return -1;
}
static void dlg_onreply(struct cell* t, int type, struct tmcb_params *param)
{
struct sip_msg *rpl,*req;
struct dlg_cell *dlg;
int new_state;
int old_state;
int unref;
int event;
str mangled_from = {0,0};
str mangled_to = {0,0};
str *req_out_buff;
dlg = (struct dlg_cell *)(*param->param);
if (shutdown_done || dlg==0)
return;
rpl = param->rpl;
req = param->req;
if (type==TMCB_RESPONSE_FWDED) {
/* this callback is under transaction lock (by TM), so it is save
to operate at write level, but we need to take care on write-read
conflicts -bogdan */
if (rpl!=FAKED_REPLY) {
if (req->msg_flags & (FL_USE_UAC_FROM | FL_USE_UAC_TO ) ) {
req_out_buff = &t->uac[d_tmb.get_branch_index()].request.buffer;
if (extract_ftc_hdrs(req_out_buff->s,req_out_buff->len,
(req->msg_flags & FL_USE_UAC_FROM )?&mangled_from:0,
(req->msg_flags & FL_USE_UAC_TO )?&mangled_to:0,0,0) != 0) {
LM_ERR("failed to extract mangled FROM and TO hdrs\n");
mangled_from.len = 0;
mangled_from.s = NULL;
mangled_to.len = 0;
mangled_to.s = NULL;
} else {
if ((req->msg_flags & FL_USE_UAC_FROM) && (mangled_from.len == 0 || mangled_from.s == NULL))
LM_CRIT("extract_ftc_hdrs ok but no from extracted : [%.*s]\n",req_out_buff->len,req_out_buff->s);
if ((req->msg_flags & FL_USE_UAC_TO) && (mangled_to.len == 0 || mangled_to.s == NULL))
LM_CRIT("extract_ftc_hdrs ok but no to extracted : [%.*s]\n",req_out_buff->len,req_out_buff->s);
}
}
push_reply_in_dialog( rpl, t, dlg,&mangled_from,&mangled_to);
if((dlg->flags & DLG_FLAG_TOPHIDING) &&
dlg_th_onreply(dlg, rpl,req, 1, DLG_DIR_UPSTREAM) < 0)
LM_ERR("Failed to transform the reply for topology hiding\n");
} else {
LM_DBG("dialog replied from script - cannot get callee info\n");
}
/* The state does not change, but the msg is mutable in this callback*/
run_dlg_callbacks(DLGCB_RESPONSE_FWDED, dlg, rpl, DLG_DIR_UPSTREAM, 0);
return;
}
if (type==TMCB_TRANS_CANCELLED) {
/* only if we did force match the Cancel to the
* dialog before ( from the script ) */
if (current_dlg_pointer == NULL) {
/* reference and attached to script */
ref_dlg(dlg,1);
current_dlg_pointer = t->dialog_ctx;
}
return;
}
if (type==TMCB_TRANS_DELETED)
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);
if (new_state==DLG_STATE_EARLY && old_state!=DLG_STATE_EARLY) {
run_dlg_callbacks(DLGCB_EARLY, dlg, rpl, DLG_DIR_UPSTREAM, 0);
if_update_stat(dlg_enable_stats, early_dlgs, 1);
return;
}
if (new_state==DLG_STATE_CONFIRMED_NA &&
old_state!=DLG_STATE_CONFIRMED_NA && old_state!=DLG_STATE_CONFIRMED ) {
LM_DBG("dialog %p confirmed\n",dlg);
/* set start time */
dlg->start_ts = (unsigned int)(time(0));
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->legs[DLG_CALLER_LEG].tag.len,
dlg->legs[DLG_CALLER_LEG].tag.s,
dlg->legs[callee_idx(dlg)].tag.len,
ZSW(dlg->legs[callee_idx(dlg)].tag.s));
} else {
/* reference dialog as kept in timer list */
ref_dlg(dlg,1);
}
if (dlg->flags & DLG_FLAG_PING_CALLER || dlg->flags & DLG_FLAG_PING_CALLEE) {
if (0 != insert_ping_timer( dlg)) {
LM_CRIT("Unable to insert ping 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->legs[DLG_CALLER_LEG].tag.len,
dlg->legs[DLG_CALLER_LEG].tag.s,
dlg->legs[callee_idx(dlg)].tag.len,
ZSW(dlg->legs[callee_idx(dlg)].tag.s));
} else {
/* reference dialog as kept in ping timer list */
ref_dlg(dlg,1);
}
}
/* 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->flags |= DLG_FLAG_NEW;
if ( dlg_db_mode==DB_MODE_REALTIME )
update_dialog_dbinfo(dlg);
/* dialog confirmed */
run_dlg_callbacks( DLGCB_CONFIRMED, dlg, rpl, DLG_DIR_UPSTREAM, 0);
if (replication_dests)
replicate_dialog_created(dlg);
if (old_state==DLG_STATE_EARLY)
if_update_stat(dlg_enable_stats, early_dlgs, -1);
if_update_stat(dlg_enable_stats, active_dlgs, 1);
return;
}
if ( old_state!=DLG_STATE_DELETED && new_state==DLG_STATE_DELETED ) {
LM_DBG("dialog %p failed (negative reply)\n", dlg);
/*destroy linkers */
destroy_linkers(dlg->profile_links);
dlg->profile_links = NULL;
/* dialog setup not completed (3456XX) */
run_dlg_callbacks( DLGCB_FAILED, dlg, rpl, DLG_DIR_UPSTREAM, 0);
/* do unref */
if (unref)
unref_dlg(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);
return;
}
/* in any other case, check if the dialog state machine
requests to unref the dialog */
if (unref)
unref_dlg(dlg,unref);
return;
}
static int sync_dlg_db_mem(void)
{
db_res_t * res;
db_val_t * values;
db_row_t * rows;
struct dlg_entry *d_entry;
struct dlg_cell *it,*known_dlg,*dlg=NULL;
int i, nr_rows,callee_leg_idx,next_id,db_timeout;
int no_rows = 10;
unsigned int db_caller_cseq,db_callee_cseq,dlg_caller_cseq,dlg_callee_cseq;
struct socket_info *caller_sock,*callee_sock;
str callid, from_uri, to_uri, from_tag, to_tag;
str cseq1,cseq2,contact1,contact2,rroute1,rroute2,mangled_fu,mangled_tu;
res = 0;
if((nr_rows = select_entire_dialog_table(&res,&no_rows)) < 0)
goto error;
nr_rows = RES_ROW_N(res);
do {
LM_DBG("loading information from database for %i dialogs\n", nr_rows);
rows = RES_ROWS(res);
/* for every row---dialog */
for(i=0; i<nr_rows; i++){
values = ROW_VALUES(rows + i);
if (VAL_NULL(values) || VAL_NULL(values+1)) {
LM_ERR("columns %.*s or/and %.*s cannot be null -> skipping\n",
h_entry_column.len, h_entry_column.s,
h_id_column.len, h_id_column.s);
continue;
}
if (VAL_NULL(values+7) || VAL_NULL(values+8)) {
LM_ERR("columns %.*s or/and %.*s cannot be null -> skipping\n",
start_time_column.len, start_time_column.s,
state_column.len, state_column.s);
continue;
}
if ( VAL_INT(values+8) == DLG_STATE_DELETED ) {
LM_DBG("dialog already terminated -> skipping\n");
continue;
}
/*restore the dialog info*/
GET_STR_VALUE(callid, values, 2, 1, 0);
GET_STR_VALUE(from_tag, values, 4, 1, 0);
GET_STR_VALUE(to_tag, values, 6, 1, 1);
/* TODO - check about hash resize ? maybe hash was lowered & we overflow the hash */
known_dlg = 0;
d_entry = &(d_table->entries[VAL_INT(values)]);
for (it=d_entry->first;it;it=it->next)
if (it->callid.len == callid.len &&
it->legs[DLG_CALLER_LEG].tag.len == from_tag.len &&
memcmp(it->callid.s,callid.s,callid.len)==0 &&
memcmp(it->legs[DLG_CALLER_LEG].tag.s,from_tag.s,from_tag.len)==0) {
/* callid & ftag match */
callee_leg_idx = callee_idx(it);
if (it->legs[callee_leg_idx].tag.len == to_tag.len &&
memcmp(it->legs[callee_leg_idx].tag.s,to_tag.s,to_tag.len)==0) {
/* full dlg match */
known_dlg = it;
break;
}
}
if (known_dlg == 0) {
LM_DBG("First seen dialog - load all stuff - callid = [%.*s]\n",callid.len,callid.s);
GET_STR_VALUE(from_uri, values, 3, 1, 0);
GET_STR_VALUE(to_uri, values, 5, 1, 0);
caller_sock = create_socket_info(values, 16);
callee_sock = create_socket_info(values, 17);
if (caller_sock == NULL || callee_sock == NULL) {
LM_ERR("Dialog in DB doesn't match any listening sockets");
continue;
}
/* first time we see this dialog - build it from scratch */
if((dlg=build_new_dlg(&callid, &from_uri, &to_uri, &from_tag))==0){
LM_ERR("failed to build new dialog\n");
goto error;
}
if(dlg->h_entry != VAL_INT(values)){
LM_ERR("inconsistent hash data in the dialog database: "
"you may have restarted opensips using a different "
"hash_size: please erase %.*s database and restart\n",
dialog_table_name.len, dialog_table_name.s);
shm_free(dlg);
goto error;
}
/*link the dialog*/
link_dlg(dlg, 0);
dlg->h_id = VAL_INT(values+1);
next_id = d_table->entries[dlg->h_entry].next_id;
d_table->entries[dlg->h_entry].next_id =
(next_id < dlg->h_id) ? (dlg->h_id+1) : next_id;
dlg->start_ts = VAL_INT(values+7);
dlg->state = VAL_INT(values+8);
if (dlg->state==DLG_STATE_CONFIRMED_NA ||
dlg->state==DLG_STATE_CONFIRMED) {
if_update_stat(dlg_enable_stats, active_dlgs, 1);
} else if (dlg->state==DLG_STATE_EARLY) {
if_update_stat(dlg_enable_stats, early_dlgs, 1);
}
GET_STR_VALUE(cseq1, values, 10 , 1, 1);
GET_STR_VALUE(cseq2, values, 11 , 1, 1);
GET_STR_VALUE(rroute1, values, 12, 0, 0);
GET_STR_VALUE(rroute2, values, 13, 0, 0);
GET_STR_VALUE(contact1, values, 14, 0, 1);
GET_STR_VALUE(contact2, values, 15, 0, 1);
GET_STR_VALUE(mangled_fu, values, 24,0,1);
GET_STR_VALUE(mangled_tu, values, 25,0,1);
/* add the 2 legs */
if ( (dlg_add_leg_info( dlg, &from_tag, &rroute1, &contact1,
&cseq1, caller_sock,0,0)!=0) ||
(dlg_add_leg_info( dlg, &to_tag, &rroute2, &contact2,
&cseq2, callee_sock,&mangled_fu,&mangled_tu)!=0) ) {
LM_ERR("dlg_set_leg_info failed\n");
/* destroy the dialog */
unref_dlg(dlg,1);
continue;
}
dlg->legs_no[DLG_LEG_200OK] = DLG_FIRST_CALLEE_LEG;
/* script variables */
if (!VAL_NULL(values+18))
read_dialog_vars( VAL_STR(values+18).s,
VAL_STR(values+18).len, dlg);
/* profiles */
if (!VAL_NULL(values+19))
read_dialog_profiles( VAL_STR(values+19).s,
strlen(VAL_STR(values+19).s), dlg,0);
/* script flags */
if (!VAL_NULL(values+20)) {
dlg->user_flags = VAL_INT(values+20);
}
/* top hiding */
dlg->flags = VAL_INT(values+23);
if (dlg_db_mode==DB_MODE_SHUTDOWN)
dlg->flags |= DLG_FLAG_NEW;
/* calculcate timeout */
dlg->tl.timeout = (unsigned int)(VAL_INT(values+9)) + get_ticks();
if (dlg->tl.timeout<=(unsigned int)time(0))
dlg->tl.timeout = 0;
else
dlg->tl.timeout -= (unsigned int)time(0);
/* restore the timer values */
if (0 != insert_dlg_timer( &(dlg->tl), (int)dlg->tl.timeout )) {
LM_CRIT("Unable to insert 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->legs[DLG_CALLER_LEG].tag.len,
dlg->legs[DLG_CALLER_LEG].tag.s,
dlg->legs[callee_idx(dlg)].tag.len,
ZSW(dlg->legs[callee_idx(dlg)].tag.s));
/* destroy the dialog */
unref_dlg(dlg,1);
continue;
}
/* reference the dialog as kept in the timer list */
ref_dlg(dlg,1);
LM_DBG("current dialog timeout is %u\n", dlg->tl.timeout);
dlg->lifetime = 0;
dlg->legs[DLG_CALLER_LEG].last_gen_cseq =
(unsigned int)(VAL_INT(values+21));
dlg->legs[callee_idx(dlg)].last_gen_cseq =
(unsigned int)(VAL_INT(values+22));
if (dlg->flags & DLG_FLAG_PING_CALLER || dlg->flags & DLG_FLAG_PING_CALLEE) {
if (0 != insert_ping_timer(dlg))
LM_CRIT("Unable to insert dlg %p into ping timer\n",dlg);
else {
/* reference dialog as kept in ping timer list */
ref_dlg(dlg,1);
}
}
} else {
/* we already saw this dialog before
* check which is the newer version */
if (known_dlg->state > VAL_INT(values+8)) {
LM_DBG("mem has a newer state - ignore \n");
/* we know a newer version compared to the DB
* ignore it */
goto next_dialog;
} else if (known_dlg->state == VAL_INT(values+8)) {
LM_DBG("mem has same state as DB \n");
/* same state :-( no way to tell which is newer */
/* play nice and store longest timeout, although not always correct*/
db_timeout = (unsigned int)(VAL_INT(values+9)) +
get_ticks();
if (db_timeout<=(unsigned int)time(0))
db_timeout = 0;
else
db_timeout -= (unsigned int)time(0);
if (known_dlg->tl.timeout < db_timeout)
known_dlg->tl.timeout = db_timeout;
/* check with is newer cseq for caller leg */
if (!VAL_NULL(values+10)) {
cseq1.s = VAL_STR(values+10).s;
cseq1.len = strlen(cseq1.s);
str2int(&cseq1,&db_caller_cseq);
str2int(&known_dlg->legs[DLG_CALLER_LEG].r_cseq,&dlg_caller_cseq);
/* Is DB cseq newer ? */
if (db_caller_cseq > dlg_caller_cseq) {
if (known_dlg->legs[DLG_CALLER_LEG].r_cseq.len < cseq1.len) {
known_dlg->legs[DLG_CALLER_LEG].r_cseq.s =
shm_realloc(known_dlg->legs[DLG_CALLER_LEG].r_cseq.s,cseq1.len);
if (!known_dlg->legs[DLG_CALLER_LEG].r_cseq.s) {
LM_ERR("no more shm\n");
goto next_dialog;
}
}
memcpy(known_dlg->legs[DLG_CALLER_LEG].r_cseq.s,cseq1.s,cseq1.len);
known_dlg->legs[DLG_CALLER_LEG].r_cseq.len = cseq1.len;
}
} else {
/* DB has a null cseq - just keep
* what we have so far */
;
}
/* check with is newer cseq for caller leg */
if (!VAL_NULL(values+11)) {
cseq2.s = VAL_STR(values+11).s;
cseq2.len = strlen(cseq2.s);
callee_leg_idx = callee_idx(known_dlg);
str2int(&cseq2,&db_callee_cseq);
str2int(&known_dlg->legs[callee_leg_idx].r_cseq,&dlg_callee_cseq);
/* Is DB cseq newer ? */
if (db_callee_cseq > dlg_callee_cseq) {
if (known_dlg->legs[callee_leg_idx].r_cseq.len < cseq2.len) {
known_dlg->legs[callee_leg_idx].r_cseq.s =
shm_realloc(known_dlg->legs[callee_leg_idx].r_cseq.s,cseq2.len);
if (!known_dlg->legs[callee_leg_idx].r_cseq.s) {
LM_ERR("no more shm\n");
goto next_dialog;
}
}
memcpy(known_dlg->legs[callee_leg_idx].r_cseq.s,cseq2.s,cseq2.len);
known_dlg->legs[callee_leg_idx].r_cseq.len = cseq2.len;
}
} else {
/* DB has a null cseq - just keep
* what we have so far */
;
}
/* update ping cseqs, whichever is newer */
if (known_dlg->legs[DLG_CALLER_LEG].last_gen_cseq <
(unsigned int)(VAL_INT(values+21)))
known_dlg->legs[DLG_CALLER_LEG].last_gen_cseq =
(unsigned int)(VAL_INT(values+21));
if (known_dlg->legs[callee_idx(known_dlg)].last_gen_cseq <
(unsigned int)(VAL_INT(values+22)))
known_dlg->legs[callee_idx(known_dlg)].last_gen_cseq =
(unsigned int)(VAL_INT(values+22));
/* update script variables
* if already found, delete the old ones
* and replace with new one */
if (!VAL_NULL(values+18))
read_dialog_vars( VAL_STR(values+18).s,
VAL_STR(values+18).len, known_dlg);
/* skip flags - keep what we have - anyway can't tell which is new */
/* profiles - do not insert into a profile
* is dlg is already in that profile*/
if (!VAL_NULL(values+19))
read_dialog_profiles( VAL_STR(values+19).s,
strlen(VAL_STR(values+19).s), known_dlg,1);
} else {
/* DB has newer state, just update fields from DB */
LM_DBG("DB has newer state \n");
/* set new state */
known_dlg->state = VAL_INT(values+8);
/* update timeout */
known_dlg->tl.timeout = (unsigned int)(VAL_INT(values+9)) +
get_ticks();
if (known_dlg->tl.timeout<=(unsigned int)time(0))
known_dlg->tl.timeout = 0;
else
known_dlg->tl.timeout -= (unsigned int)time(0);
/* update cseqs */
if (!VAL_NULL(values+10)) {
cseq1.s = VAL_STR(values+10).s;
cseq1.len = strlen(cseq1.s);
if (known_dlg->legs[DLG_CALLER_LEG].r_cseq.len < cseq1.len) {
known_dlg->legs[DLG_CALLER_LEG].r_cseq.s =
shm_realloc(known_dlg->legs[DLG_CALLER_LEG].r_cseq.s,cseq1.len);
if (!known_dlg->legs[DLG_CALLER_LEG].r_cseq.s) {
LM_ERR("no more shm\n");
goto next_dialog;
}
}
memcpy(known_dlg->legs[DLG_CALLER_LEG].r_cseq.s,cseq1.s,cseq1.len);
known_dlg->legs[DLG_CALLER_LEG].r_cseq.len = cseq1.len;
}
if (!VAL_NULL(values+11)) {
cseq2.s = VAL_STR(values+11).s;
cseq2.len = strlen(cseq1.s);
callee_leg_idx = callee_idx(known_dlg);
if (known_dlg->legs[callee_leg_idx].r_cseq.len < cseq2.len) {
known_dlg->legs[callee_leg_idx].r_cseq.s =
shm_realloc(known_dlg->legs[callee_leg_idx].r_cseq.s,cseq2.len);
if (!known_dlg->legs[callee_leg_idx].r_cseq.s) {
LM_ERR("no more shm\n");
goto next_dialog;
}
}
memcpy(known_dlg->legs[callee_leg_idx].r_cseq.s,cseq2.s,cseq2.len);
known_dlg->legs[callee_leg_idx].r_cseq.len = cseq2.len;
}
/* update ping cseqs */
known_dlg->legs[DLG_CALLER_LEG].last_gen_cseq =
(unsigned int)(VAL_INT(values+21));
known_dlg->legs[callee_idx(known_dlg)].last_gen_cseq =
(unsigned int)(VAL_INT(values+22));
/* update flags */
known_dlg->flags = VAL_INT(values+23);
if (dlg_db_mode==DB_MODE_SHUTDOWN)
known_dlg->flags |= DLG_FLAG_NEW;
/* update script variables
* if already found, delete the old one
* and replace with new one */
if (!VAL_NULL(values+18))
read_dialog_vars( VAL_STR(values+18).s,
VAL_STR(values+18).len, known_dlg);
/* profiles - do not insert into a profile
* is dlg is already in that profile*/
if (!VAL_NULL(values+19))
read_dialog_profiles( VAL_STR(values+19).s,
strlen(VAL_STR(values+19).s), known_dlg,1);
}
}
next_dialog:
;
}
/* any more data to be fetched ?*/
if (DB_CAPABILITY(dialog_dbf, DB_CAP_FETCH)) {
if (dialog_dbf.fetch_result( dialog_db_handle, &res,no_rows) < 0) {
LM_ERR("fetching more rows failed\n");
goto error;
}
nr_rows = RES_ROW_N(res);
} else {
nr_rows = 0;
}
}while (nr_rows>0);
return 0;
error:
return -1;
}
/**
* replicates a confirmed dialog from another OpenSIPS instance
* by reading the relevant information using the Binary Packet Interface
*/
int dlg_replicated_create(struct dlg_cell *cell, str *ftag, str *ttag, int safe)
{
int next_id, h_entry;
unsigned int dir, dst_leg;
str callid, from_uri, to_uri, from_tag, to_tag;
str cseq1,cseq2,contact1,contact2,rroute1,rroute2,mangled_fu,mangled_tu;
str sock, vars, profiles;
struct dlg_cell *dlg = NULL;
struct socket_info *caller_sock, *callee_sock;
struct dlg_entry *d_entry;
if_update_stat(dlg_enable_stats, processed_dlgs, 1);
LM_DBG("Received replicated dialog!\n");
if (!cell) {
bin_pop_str(&callid);
bin_pop_str(&from_tag);
bin_pop_str(&to_tag);
bin_pop_str(&from_uri);
bin_pop_str(&to_uri);
dlg = get_dlg(&callid, &from_tag, &to_tag, &dir, &dst_leg);
h_entry = dlg_hash(&callid);
d_entry = &d_table->entries[h_entry];
if (safe)
dlg_lock(d_table, d_entry);
if (dlg) {
/* TODO: change to LM_DBG */
LM_ERR("Dialog with ci '%.*s' is already created\n",
callid.len, callid.s);
unref_dlg_unsafe(dlg, 1, d_entry);
dlg_unlock(d_table, d_entry);
return 0;
}
dlg = build_new_dlg(&callid, &from_uri, &to_uri, &from_tag);
if (!dlg) {
LM_ERR("Failed to create replicated dialog!\n");
goto error;
}
} else {
h_entry = dlg_hash(&cell->callid);
d_entry = &d_table->entries[h_entry];
if (safe)
dlg_lock(d_table, d_entry);
from_tag = *ftag;
to_tag = *ttag;
dlg = cell;
}
/* link the dialog into the hash */
dlg->h_id = d_entry->next_id++;
if (!d_entry->first)
d_entry->first = d_entry->last = dlg;
else {
d_entry->last->next = dlg;
dlg->prev = d_entry->last;
d_entry->last = dlg;
}
dlg->ref++;
d_entry->cnt++;
bin_pop_int(&dlg->h_id);
bin_pop_int(&dlg->start_ts);
bin_pop_int(&dlg->state);
next_id = d_table->entries[dlg->h_entry].next_id;
d_table->entries[dlg->h_entry].next_id =
(next_id < dlg->h_id) ? (dlg->h_id + 1) : next_id;
if (bin_pop_str(&sock))
goto packet_error;
caller_sock = fetch_socket_info(&sock);
if (bin_pop_str(&sock))
goto packet_error;
callee_sock = fetch_socket_info(&sock);
if (!caller_sock || !callee_sock) {
LM_ERR("Dialog in DB doesn't match any listening sockets\n");
goto packet_error;
}
bin_pop_str(&cseq1);
bin_pop_str(&cseq2);
bin_pop_str(&rroute1);
bin_pop_str(&rroute2);
bin_pop_str(&contact1);
bin_pop_str(&contact2);
bin_pop_str(&mangled_fu);
bin_pop_str(&mangled_tu);
/* add the 2 legs */
if (dlg_add_leg_info(dlg, &from_tag, &rroute1, &contact1,
&cseq1, caller_sock, 0, 0) != 0 ||
dlg_add_leg_info(dlg, &to_tag, &rroute2, &contact2,
&cseq2, callee_sock, &mangled_fu, &mangled_tu) != 0) {
LM_ERR("dlg_set_leg_info failed\n");
goto error;
}
dlg->legs_no[DLG_LEG_200OK] = DLG_FIRST_CALLEE_LEG;
bin_pop_str(&vars);
bin_pop_str(&profiles);
bin_pop_int(&dlg->user_flags);
bin_pop_int(&dlg->flags);
bin_pop_int((void *)&dlg->tl.timeout);
bin_pop_int(&dlg->legs[DLG_CALLER_LEG].last_gen_cseq);
bin_pop_int(&dlg->legs[callee_idx(dlg)].last_gen_cseq);
if (dlg->tl.timeout <= (unsigned int)time(0))
dlg->tl.timeout = 0;
else
dlg->tl.timeout -= (unsigned int)time(0);
/* restore the timer values */
if (insert_dlg_timer(&dlg->tl, (int)dlg->tl.timeout) != 0) {
LM_CRIT("Unable to insert 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->legs[DLG_CALLER_LEG].tag.len,
dlg->legs[DLG_CALLER_LEG].tag.s,
dlg->legs[callee_idx(dlg)].tag.len,
ZSW(dlg->legs[callee_idx(dlg)].tag.s));
goto error;
}
if (dlg->state == DLG_STATE_CONFIRMED_NA ||
dlg->state == DLG_STATE_CONFIRMED)
active_dlgs_cnt++;
/* reference the dialog as kept in the timer list */
ref_dlg_unsafe(dlg, 1);
LM_DBG("current dialog timeout is %u\n", dlg->tl.timeout);
dlg->lifetime = 0;
if (dlg->flags & DLG_FLAG_PING_CALLER || dlg->flags & DLG_FLAG_PING_CALLEE) {
if (insert_ping_timer(dlg) != 0)
LM_CRIT("Unable to insert dlg %p into ping timer\n",dlg);
else {
/* reference dialog as kept in ping timer list */
ref_dlg(dlg, 1);
}
}
if (dlg_db_mode == DB_MODE_DELAYED) {
/* to be later removed by timer */
ref_dlg_unsafe(dlg, 1);
}
if (vars.s && vars.len != 0)
read_dialog_vars(vars.s, vars.len, dlg);
dlg_unlock(d_table, d_entry);
if (profiles.s && profiles.len != 0)
read_dialog_profiles(profiles.s, profiles.len, dlg, 0);
if_update_stat(dlg_enable_stats, active_dlgs, 1);
return 0;
error:
dlg_unlock(d_table, d_entry);
if (dlg)
unref_dlg(dlg, 1);
return -1;
packet_error:
dlg_unlock(d_table, d_entry);
LM_ERR("Received malformed UDP binary packet!\n");
return -2;
}
void dlg_onroute(struct sip_msg* req, str *route_params, void *param)
{
struct dlg_cell *dlg;
str val = {0,0};
str callid;
str ftag;
str ttag;
int h_entry;
int h_id;
int new_state;
int old_state;
int unref;
int event;
int timeout;
unsigned int update_val;
unsigned int dir,dst_leg,src_leg;
int ret = 0,ok = 1;
struct dlg_entry *d_entry;
str *msg_cseq;
char *final_cseq;
/* as this callback is triggered from loose_route, which can be
accidentaly called more than once from script, we need to be sure
we do this only once !*/
if (current_dlg_pointer)
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;
dst_leg = -1;
/* From RR callback, param will be NULL
* From match_dialog, param might have a value, if we
* are in the topology hiding case & we were able to extract the
* DID from the R-URI */
if (param)
val = *((str *)param);
if ( seq_match_mode!=SEQ_MATCH_NO_ID ) {
if( val.s == NULL && 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 = lookup_dlg( h_entry, h_id);
if (dlg==0) {
LM_DBG("unable to find dialog for %.*s "
"with route param '%.*s'\n",
req->first_line.u.request.method.len,
req->first_line.u.request.method.s,
val.len,val.s);
} else {
/* lookup_dlg has incremented the ref count by 1 */
if (pre_match_parse( req, &callid, &ftag, &ttag)<0) {
unref_dlg(dlg, 1);
return;
}
if (match_dialog(dlg,&callid,&ftag,&ttag,&dir, &dst_leg )==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->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,
ZSW(dlg->legs[callee_idx(dlg)].tag.s),
dlg->legs[callee_idx(dlg)].tag.len);
unref_dlg(dlg, 1);
dlg = NULL;
}
}
if (dlg==NULL && seq_match_mode==SEQ_MATCH_STRICT_ID )
return;
}
}
if (dlg==0) {
if (pre_match_parse( req, &callid, &ftag, &ttag)<0)
return;
/* TODO - try to use the RR dir detection to speed up here the
* search -bogdan */
dlg = get_dlg(&callid, &ftag, &ttag, &dir, &dst_leg);
if (!dlg){
LM_DBG("Callid '%.*s' not found\n",
req->callid->body.len, req->callid->body.s);
return;
}
}
/* 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;
}
/* save last_dst_leg before running state machine
* helpful for logging various bogus cases according to the RFC */
last_dst_leg = dst_leg;
next_state_dlg( dlg, event, &old_state, &new_state, &unref);
/* set current dialog - it will keep a ref! */
set_current_dialog(dlg);
log_bogus_dst_leg(dlg);
d_entry = &(d_table->entries[dlg->h_entry]);
if(dlg->flags & DLG_FLAG_TOPHIDING) {
dlg_th_onroute(dlg, req, dir);
}
/* run actions for the transition */
if (event==DLG_EVENT_REQBYE && new_state==DLG_STATE_DELETED &&
old_state!=DLG_STATE_DELETED) {
/*destroy linkers */
destroy_linkers(dlg->profile_links);
dlg->profile_links = NULL;
if (!dlg->terminate_reason.s) {
if (last_dst_leg == 0)
init_dlg_term_reason(dlg,"Upstream BYE",sizeof("Upstream BYE")-1);
else
init_dlg_term_reason(dlg,"Downstream BYE",sizeof("Downstream BYE")-1);
}
LM_DBG("BYE successfully processed - dst_leg = %d\n",last_dst_leg);
if (dlg->flags & DLG_FLAG_PING_CALLER || dlg->flags & DLG_FLAG_PING_CALLEE) {
dlg_lock (d_table,d_entry);
if (dlg->legs[dst_leg].last_gen_cseq) {
update_val = ++(dlg->legs[dst_leg].last_gen_cseq);
dlg_unlock (d_table,d_entry);
if (update_msg_cseq(req,0,update_val) != 0)
LM_ERR("failed to update BYE msg cseq\n");
msg_cseq = &((struct cseq_body *)req->cseq->parsed)->number;
final_cseq = shm_malloc(msg_cseq->len + 1);
if (final_cseq == 0) {
LM_ERR("no more shm mem\n");
goto after_unlock5;
}
memcpy(final_cseq,msg_cseq->s,msg_cseq->len);
final_cseq[msg_cseq->len] = 0;
if ( d_tmb.register_tmcb( req, 0, TMCB_RESPONSE_FWDED,
fix_final_cseq,
(void*)final_cseq, 0)<0 ) {
LM_ERR("failed to register TMCB (2)\n");
}
}
else
dlg_unlock (d_table,d_entry);
}
after_unlock5:
/* remove from timer */
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->legs[DLG_CALLER_LEG].tag.len,
dlg->legs[DLG_CALLER_LEG].tag.s,
dlg->legs[callee_idx(dlg)].tag.len,
ZSW(dlg->legs[callee_idx(dlg)].tag.s));
} else if (ret > 0) {
LM_DBG("dlg expired (not in timer list) 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->legs[DLG_CALLER_LEG].tag.len,
dlg->legs[DLG_CALLER_LEG].tag.s,
dlg->legs[callee_idx(dlg)].tag.len,
ZSW(dlg->legs[callee_idx(dlg)].tag.s));
} else {
/* dialog sucessfully removed from timer -> unref */
unref++;
}
/* dialog terminated (BYE) */
run_dlg_callbacks( DLGCB_TERMINATED, dlg, req, dir, 0);
/* delete the dialog from DB */
if (should_remove_dlg_db())
remove_dialog_from_db(dlg);
/* destroy dialog */
unref_dlg(dlg, unref);
if_update_stat( dlg_enable_stats, active_dlgs, -1);
return;
}
if ( (event==DLG_EVENT_REQ || event==DLG_EVENT_REQACK)
&& new_state==DLG_STATE_CONFIRMED) {
LM_DBG("sequential request successfully processed (dst_leg=%d)\n",
dst_leg);
/* within dialog request */
run_dlg_callbacks( DLGCB_REQ_WITHIN, dlg, req, dir, 0);
timeout = get_dlg_timeout_update(req);
/* update timer during sequential request? */
if (timeout != 0) {
dlg->lifetime = timeout;
if (update_dlg_timer( &dlg->tl, dlg->lifetime )==-1)
LM_ERR("failed to update dialog lifetime\n");
}
if ( event!=DLG_EVENT_REQACK ) {
if (dst_leg==-1 || switch_cseqs(dlg, dst_leg) != 0 ||
update_cseqs(dlg,req,dst_leg,0)) {
ok = 0;
LM_ERR("cseqs update failed on leg=%d\n",dst_leg);
}
if (req->first_line.u.request.method_value == METHOD_INVITE) {
if (dst_leg == DLG_CALLER_LEG)
src_leg = callee_idx(dlg);
else
src_leg = DLG_CALLER_LEG;
if (update_cseqs(dlg,req,src_leg,1) != 0) {
ok=0;
LM_ERR("failed to update inv cseq on leg %d\n",src_leg);
}
}
if (dlg->flags & DLG_FLAG_PING_CALLER ||
dlg->flags & DLG_FLAG_PING_CALLEE) {
dlg_lock (d_table, d_entry);
if (dlg->legs[dst_leg].last_gen_cseq) {
update_val = ++(dlg->legs[dst_leg].last_gen_cseq);
dlg_unlock( d_table, d_entry );
if (update_msg_cseq(req,0,update_val) != 0) {
LM_ERR("failed to update sequential request msg cseq\n");
ok = 0;
}
}
else
dlg_unlock( d_table, d_entry );
}
if (ok) {
dlg->flags |= DLG_FLAG_CHANGED;
if ( dlg_db_mode==DB_MODE_REALTIME )
update_dialog_dbinfo(dlg);
if (replication_dests)
replicate_dialog_updated(dlg);
}
}
else
{
if (dlg->flags & DLG_FLAG_PING_CALLER ||
dlg->flags & DLG_FLAG_PING_CALLEE) {
dlg_lock (d_table, d_entry);
if (dlg->legs[dst_leg].last_gen_cseq) {
update_val = dlg->legs[dst_leg].last_gen_cseq;
dlg_unlock( d_table, d_entry );
if (update_msg_cseq(req,0,update_val) != 0) {
LM_ERR("failed to update ACK msg cseq\n");
}
}
else
dlg_unlock( d_table, d_entry );
}
}
if ( event!=DLG_EVENT_REQACK) {
/* register callback for the replies of this request */
if (dlg->flags & DLG_FLAG_PING_CALLER || dlg->flags & DLG_FLAG_PING_CALLEE) {
dlg_lock( d_table, d_entry);
if (dlg->legs[dst_leg].last_gen_cseq) {
/* ref the dialog as registered into the transaction callback.
* unref will be done when the callback will be destroyed */
ref_dlg_unsafe( dlg, 1);
dlg_unlock( d_table,d_entry);
if(parse_headers(req, HDR_CSEQ_F, 0) <0 ) {
LM_ERR("failed to parse cseq header \n");
unref_dlg(dlg,1);
goto early_check;
}
msg_cseq = &((struct cseq_body *)req->cseq->parsed)->number;
dlg_cseq_wrapper *wrap = shm_malloc(sizeof(dlg_cseq_wrapper) +
msg_cseq->len);
if (wrap == 0){
LM_ERR("No more shm mem\n");
unref_dlg(dlg, 1);
goto early_check;
}
wrap->dlg = dlg;
wrap->cseq.s = (char *)(wrap + 1);
wrap->cseq.len = msg_cseq->len;
memcpy(wrap->cseq.s,msg_cseq->s,msg_cseq->len);
if ( d_tmb.register_tmcb( req, 0, TMCB_RESPONSE_FWDED,
(dir==DLG_DIR_UPSTREAM)?dlg_seq_down_onreply_mod_cseq:dlg_seq_up_onreply_mod_cseq,
(void*)wrap, unreference_dialog_cseq)<0 ) {
LM_ERR("failed to register TMCB (2)\n");
unref_dlg( dlg , 1);
shm_free(wrap);
}
}
else {
/* dialog is in ping timer list
* but no pings have been generated yet */
dlg_unlock ( d_table, d_entry );
goto regular_indlg_req;
}
} else {
regular_indlg_req:
if (dlg->cbs.types & DLGCB_RESPONSE_WITHIN)
{
ref_dlg( dlg , 1);
if ( d_tmb.register_tmcb( req, 0, TMCB_RESPONSE_FWDED,
(dir==DLG_DIR_UPSTREAM)?dlg_seq_down_onreply:dlg_seq_up_onreply,
(void*)dlg, unreference_dialog)<0 ) {
LM_ERR("failed to register TMCB (2)\n");
unref_dlg( dlg , 1);
}
}
}
}
}
early_check:
if ( (event==DLG_EVENT_REQPRACK || event == DLG_EVENT_REQ)
&& new_state==DLG_STATE_EARLY) {
/* within dialog request */
run_dlg_callbacks( DLGCB_REQ_WITHIN, dlg, req, dir, 0);
LM_DBG("EARLY event %d successfully processed (dst_leg=%d)\n",event,dst_leg);
if (dst_leg==-1 || switch_cseqs(dlg, dst_leg) != 0 ||
update_cseqs(dlg,req,dst_leg,0))
LM_ERR("cseqs update failed on leg=%d\n",dst_leg);
}
if(new_state==DLG_STATE_CONFIRMED && old_state==DLG_STATE_CONFIRMED_NA){
dlg->flags |= DLG_FLAG_CHANGED;
if(dlg_db_mode == DB_MODE_REALTIME)
update_dialog_dbinfo(dlg);
if (replication_dests)
replicate_dialog_updated(dlg);
}
return;
}
/*!
* \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 msg SIP message
* \param t transaction
* \return 0 on success, -1 on failure
*/
int dlg_new_dialog(struct sip_msg *req, struct cell *t, const int run_initial_cbs) {
struct dlg_cell *dlg;
str s;
str callid;
str ftag;
str ttag;
str req_uri;
unsigned int dir;
LM_DBG("starting dlg_new_dialog and method is [%.*s]\n", req->first_line.u.request.method.len, req->first_line.u.request.method.s);
if (current_dlg_pointer != NULL)
return -1;
if (req->first_line.u.request.method_value == METHOD_CANCEL)
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);
if (detect_spirals) {
if (spiral_detected == 1)
return 0;
dir = DLG_DIR_NONE;
dlg = get_dlg(&callid, &ftag, &ttag, &dir);
if (dlg) {
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);
//Add did to rr header for all spiralled requested INVITEs
if (req->first_line.u.request.method_value == METHOD_INVITE) {
if (add_dlg_rr_param(dlg, req, dlg->h_entry, dlg->h_id) < 0) {
LM_ERR("failed to add RR param\n");
}
}
// get_dlg has incremented the ref count by 1
unref_dlg(dlg, 1);
goto finish;
}
}
spiral_detected = 0;
LM_DBG("Building new Dialog for call-id %.*s\n", callid.len, callid.s);
LM_DBG("SIP Method: %.*s \n", req->first_line.u.request.method.len, req->first_line.u.request.method.s);
dlg = build_new_dlg(&callid /*callid*/,
&(get_from(req)->uri) /*from uri*/,
&ftag/*from_tag*/,
&req_uri /*r-uri*/);
if (dlg == 0) {
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) {
LM_ERR("could not add further info to the dialog\n");
lock_destroy(dlg->dlg_out_entries_lock);
lock_dealloc(dlg->dlg_out_entries_lock);
shm_free(dlg);
return -1;
}
dlg->transaction = t;
/* Populate initial varlist: */
dlg->vars = get_local_varlist_pointer(req, 1);
link_dlg(dlg, 0);
if (run_initial_cbs) run_create_callbacks(dlg, req);
//Dialog will *always* use DID cookie so no need for match mode anymore
if (add_dlg_rr_param(dlg, req, dlg->h_entry, dlg->h_id) < 0) {
LM_ERR("failed to add RR param\n");
goto error;
}
if (d_tmb.register_tmcb(req, t,
TMCB_RESPONSE_READY | TMCB_RESPONSE_FWDED | TMCB_RESPONSE_OUT,
dlg_onreply, (void*) dlg, unref_new_dialog) < 0) {
LM_ERR("failed to register TMCB\n");
goto error;
}
// increase reference counter because of registered callback
ref_dlg(dlg, 1);
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;
if (_dlg_ctx.to_bye != 0)
dlg->dflags |= DLG_FLAG_TOBYE;
finish:
if (t) {
// transaction exists ==> keep ref counter large enough to
// avoid premature cleanup and ensure proper dialog referencing
if (store_dlg_in_tm(req, t, dlg) < 0) {
LM_ERR("failed to store dialog in transaction\n");
goto error;
}
} else {
// no transaction exists ==> postpone work until we see the
// request being forwarded statefully
if (d_tmb.register_tmcb(req, NULL, TMCB_REQUEST_FWDED,
store_dlg_in_tm_cb, (void*) dlg, NULL) < 0) {
LM_ERR("failed to register callback for storing dialog in transaction\n");
goto error;
}
}
LM_DBG("Setting current dialog\n");
set_current_dialog(req, dlg);
_dlg_ctx.dlg = dlg;
ref_dlg(dlg, 1);
return 0;
error:
LM_DBG("Error in build_new_dlg");
if (!spiral_detected)
unref_dlg(dlg, 1); // undo ref regarding linking
return -1;
}
static int load_dialog_info_from_db(int dlg_hash_size)
{
db_res_t * res;
db_val_t * values;
db_row_t * rows;
int i, nr_rows;
struct dlg_cell *dlg;
str callid, from_uri, to_uri, from_tag, to_tag;
str cseq1,cseq2,contact1,contact2,rroute1,rroute2,mangled_fu,mangled_tu;
unsigned int next_id;
int no_rows = 10;
struct socket_info *caller_sock,*callee_sock;
res = 0;
if((nr_rows = select_entire_dialog_table(&res,&no_rows)) < 0)
goto end;
nr_rows = RES_ROW_N(res);
do {
LM_DBG("loading information from database for %i dialogs\n", nr_rows);
rows = RES_ROWS(res);
/* for every row---dialog */
for(i=0; i<nr_rows; i++){
values = ROW_VALUES(rows + i);
if (VAL_NULL(values) || VAL_NULL(values+1)) {
LM_ERR("columns %.*s or/and %.*s cannot be null -> skipping\n",
h_entry_column.len, h_entry_column.s,
h_id_column.len, h_id_column.s);
continue;
}
if (VAL_NULL(values+7) || VAL_NULL(values+8)) {
LM_ERR("columns %.*s or/and %.*s cannot be null -> skipping\n",
start_time_column.len, start_time_column.s,
state_column.len, state_column.s);
continue;
}
if ( VAL_INT(values+8) == DLG_STATE_DELETED ) {
LM_DBG("dialog already terminated -> skipping\n");
continue;
}
caller_sock = create_socket_info(values, 16);
callee_sock = create_socket_info(values, 17);
if (caller_sock == NULL || callee_sock == NULL) {
LM_ERR("Dialog in DB doesn't match any listening sockets");
continue;
}
/*restore the dialog info*/
GET_STR_VALUE(callid, values, 2, 1, 0);
GET_STR_VALUE(from_uri, values, 3, 1, 0);
GET_STR_VALUE(from_tag, values, 4, 1, 0);
GET_STR_VALUE(to_uri, values, 5, 1, 0);
if((dlg=build_new_dlg(&callid, &from_uri, &to_uri, &from_tag))==0){
LM_ERR("failed to build new dialog\n");
goto error;
}
if(dlg->h_entry != VAL_INT(values)){
LM_ERR("inconsistent hash data in the dialog database: "
"you may have restarted opensips using a different "
"hash_size: please erase %.*s database and restart\n",
dialog_table_name.len, dialog_table_name.s);
shm_free(dlg);
goto error;
}
/*link the dialog*/
link_dlg(dlg, 0);
dlg->h_id = VAL_INT(values+1);
next_id = d_table->entries[dlg->h_entry].next_id;
d_table->entries[dlg->h_entry].next_id =
(next_id < dlg->h_id) ? (dlg->h_id+1) : next_id;
GET_STR_VALUE(to_tag, values, 6, 1, 1);
dlg->start_ts = VAL_INT(values+7);
dlg->state = VAL_INT(values+8);
if (dlg->state==DLG_STATE_CONFIRMED_NA ||
dlg->state==DLG_STATE_CONFIRMED) {
active_dlgs_cnt++;
} else if (dlg->state==DLG_STATE_EARLY) {
early_dlgs_cnt++;
}
GET_STR_VALUE(cseq1, values, 10 , 1, 1);
GET_STR_VALUE(cseq2, values, 11 , 1, 1);
GET_STR_VALUE(rroute1, values, 12, 0, 0);
GET_STR_VALUE(rroute2, values, 13, 0, 0);
GET_STR_VALUE(contact1, values, 14, 0, 1);
GET_STR_VALUE(contact2, values, 15, 0, 1);
GET_STR_VALUE(mangled_fu, values, 24,0,1);
GET_STR_VALUE(mangled_tu, values, 25,0,1);
/* add the 2 legs */
if ( (dlg_add_leg_info( dlg, &from_tag, &rroute1, &contact1,
&cseq1, caller_sock,0,0)!=0) ||
(dlg_add_leg_info( dlg, &to_tag, &rroute2, &contact2,
&cseq2, callee_sock,&mangled_fu,&mangled_tu)!=0) ) {
LM_ERR("dlg_set_leg_info failed\n");
/* destroy the dialog */
unref_dlg(dlg,1);
continue;
}
dlg->legs_no[DLG_LEG_200OK] = DLG_FIRST_CALLEE_LEG;
/* script variables */
if (!VAL_NULL(values+18))
read_dialog_vars( VAL_STR(values+18).s,
VAL_STR(values+18).len, dlg);
/* profiles */
if (!VAL_NULL(values+19))
read_dialog_profiles( VAL_STR(values+19).s,
strlen(VAL_STR(values+19).s), dlg,0);
/* script flags */
if (!VAL_NULL(values+20)) {
dlg->user_flags = VAL_INT(values+20);
}
/* top hiding */
dlg->flags = VAL_INT(values+23);
if (dlg_db_mode==DB_MODE_SHUTDOWN)
dlg->flags |= DLG_FLAG_NEW;
/* calculcate timeout */
dlg->tl.timeout = (unsigned int)(VAL_INT(values+9)) + get_ticks();
if (dlg->tl.timeout<=(unsigned int)time(0))
dlg->tl.timeout = 0;
else
dlg->tl.timeout -= (unsigned int)time(0);
/* restore the timer values */
if (0 != insert_dlg_timer( &(dlg->tl), (int)dlg->tl.timeout )) {
LM_CRIT("Unable to insert 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->legs[DLG_CALLER_LEG].tag.len,
dlg->legs[DLG_CALLER_LEG].tag.s,
dlg->legs[callee_idx(dlg)].tag.len,
ZSW(dlg->legs[callee_idx(dlg)].tag.s));
/* destroy the dialog */
unref_dlg(dlg,1);
continue;
}
/* reference the dialog as kept in the timer list */
ref_dlg(dlg,1);
LM_DBG("current dialog timeout is %u\n", dlg->tl.timeout);
dlg->lifetime = 0;
dlg->legs[DLG_CALLER_LEG].last_gen_cseq =
(unsigned int)(VAL_INT(values+21));
dlg->legs[callee_idx(dlg)].last_gen_cseq =
(unsigned int)(VAL_INT(values+22));
if (dlg->flags & DLG_FLAG_PING_CALLER || dlg->flags & DLG_FLAG_PING_CALLEE) {
if (0 != insert_ping_timer(dlg))
LM_CRIT("Unable to insert dlg %p into ping timer\n",dlg);
else {
/* reference dialog as kept in ping timer list */
ref_dlg(dlg,1);
}
}
next_dialog:
;
}
/* any more data to be fetched ?*/
if (DB_CAPABILITY(dialog_dbf, DB_CAP_FETCH)) {
if (dialog_dbf.fetch_result( dialog_db_handle, &res,no_rows) < 0) {
LM_ERR("fetching more rows failed\n");
goto error;
}
nr_rows = RES_ROW_N(res);
} else {
nr_rows = 0;
}
}while (nr_rows>0);
end:
dialog_dbf.free_result(dialog_db_handle, res);
return 0;
error:
dialog_dbf.free_result(dialog_db_handle, res);
return -1;
}
