C++ dlg_release函数代码示例

int dlg_cfg_cb(sip_msg_t *msg, unsigned int flags, void *cbp)
{
	dlg_cell_t *dlg;
	if(flags&POST_SCRIPT_CB) {
		dlg = dlg_get_ctx_dialog();
		if(dlg!=NULL) {
			if(_dlg_ctx.t==0 && (dlg->state==DLG_STATE_UNCONFIRMED
						|| _dlg_ctx.expect_t==1)) {
				if(_dlg_ctx.cpid!=0 && _dlg_ctx.cpid==my_pid()) {
					/* release to destroy dialog if created by this process
					 * and request was not forwarded */
					if(dlg->state==DLG_STATE_UNCONFIRMED) {
						LM_DBG("new dialog with no transaction after config"
									" execution\n");
					} else {
						LM_DBG("dialog with no expected transaction after"
								" config execution\n");
					}
					dlg_release(dlg);
				}
			}
			/* get ctx dlg increased ref count - release now */
			dlg_release(dlg);
		}
	}
	memset(&_dlg_ctx, 0, sizeof(dlg_ctx_t));

	return 1;
}

static int w_dlg_bye(struct sip_msg *msg, char *side, char *s2)
{
	dlg_cell_t *dlg = NULL;
	int n;

	dlg = dlg_get_ctx_dialog();
	if(dlg==NULL)
		return -1;
	
	n = (int)(long)side;
	if(n==1)
	{
		if(dlg_bye(dlg, NULL, DLG_CALLER_LEG)!=0)
			goto error;
		goto done;
	} else if(n==2) {
		if(dlg_bye(dlg, NULL, DLG_CALLEE_LEG)!=0)
			goto error;
		goto done;
	} else {
		if(dlg_bye_all(dlg, NULL)!=0)
			goto error;
		goto done;
	}

done:
	dlg_release(dlg);
	return 1;

error:
	dlg_release(dlg);
	return -1;
}

/*!
 * \brief Unset a dialog profile
 * \param msg SIP message
 * \param value value
 * \param profile dialog profile table
 * \return 1 on success, -1 on failure
 */
int unset_dlg_profile(sip_msg_t *msg, str *value,
		dlg_profile_table_t *profile)
{
	dlg_cell_t *dlg;
	dlg_profile_link_t *linker;
	dlg_profile_link_t *linker_prev;
	dlg_entry_t *d_entry;

	if (is_route_type(REQUEST_ROUTE)) {
		LM_ERR("dialog delete profile cannot be used in request route\n");
		return -1;
	}

	/* get current dialog */
	dlg = dlg_get_msg_dialog(msg);

	if (dlg==NULL) {
		LM_WARN("dialog is NULL for delete profile\n");
		return -1;
	}

	/* check the dialog linkers */
	d_entry = &d_table->entries[dlg->h_entry];
	dlg_lock( d_table, d_entry);
	linker = dlg->profile_links;
	linker_prev = NULL;
	for( ; linker ; linker_prev=linker,linker=linker->next) {
		if (linker->profile==profile) {
			if (profile->has_value==0) {
				goto found;
			} else if (value && value->len==linker->hash_linker.value.len &&
			memcmp(value->s,linker->hash_linker.value.s,value->len)==0){
				goto found;
			}
			/* allow further search - maybe the dialog is inserted twice in
			 * the same profile, but with different values -bogdan
			 */
		}
	}
	atomic_or_int((volatile int*)&dlg->dflags, DLG_FLAG_CHANGED_PROF);
	dlg_unlock( d_table, d_entry);
	dlg_release(dlg);
	return -1;

found:
	/* table still locked */
	/* remove the linker element from dialog */
	if (linker_prev==NULL) {
		dlg->profile_links = linker->next;
	} else {
		linker_prev->next = linker->next;
	}
	linker->next = NULL;
	dlg_unlock( d_table, d_entry);
	/* remove linker from profile table and free it */
	destroy_linkers(linker);
	dlg_release(dlg);
	return 1;
}

int	update_dlg_timeout(dlg_cell_t *dlg, int timeout)
{
	if(update_dlg_timer(&dlg->tl, timeout) < 0) {
		LM_ERR("failed to update dialog lifetime\n");
		dlg_release(dlg);
		return -1;
	} 

	dlg->lifetime = timeout;
	dlg->dflags |= DLG_FLAG_CHANGED;

	dlg_release(dlg);

	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_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)!=dlg_flag)
			return;
		dlg_new_dialog(req, t, 1);
		dlg = dlg_get_ctx_dialog();
	}
	if (dlg!=NULL) {
		dlg_set_tm_callbacks(t, req, dlg, spiral_detected);
		dlg_release(dlg);
	}
}

static int w_dlg_isflagset(struct sip_msg *msg, char *flag, str *s2)
{
	dlg_ctx_t *dctx;
	dlg_cell_t *d;
	int val;
	int ret;

	if(fixup_get_ivalue(msg, (gparam_p)flag, &val)!=0)
	{
		LM_ERR("no flag value\n");
		return -1;
	}
	if(val<0 || val>31)
		return -1;

	if ( (dctx=dlg_get_dlg_ctx())==NULL )
		return -1;

	d = dlg_get_by_iuid(&dctx->iuid);
	if(d!=NULL) {
		ret = (d->sflags&(1<<val))?1:-1;
		dlg_release(d);
		return ret;
	}
	return (dctx->flags&(1<<val))?1:-1;
}

/**
 * run keep-alive list
 *
 */
int dlg_ka_run(ticks_t ti)
{
	dlg_ka_t *dka;
	dlg_cell_t *dlg;

	if(dlg_ka_interval<=0)
		return 0;

	while(1) {
		/* get head item */
		lock_get(dlg_ka_list_lock);
		if(*dlg_ka_list_head==NULL) {
			lock_release(dlg_ka_list_lock);
			return 0;
		}
		dka = *dlg_ka_list_head;
#if 0
		LM_DBG("dlg ka timer at %lu for"
				" dlg[%u,%u] on %lu\n", (unsigned long)ti,
				dka->iuid.h_entry, dka->iuid.h_id,
				(unsigned long)dka->katime);
#endif
		if(dka->katime>ti) {
			lock_release(dlg_ka_list_lock);
			return 0;
		}
		if(*dlg_ka_list_head == *dlg_ka_list_tail) {
			*dlg_ka_list_head = NULL;
			*dlg_ka_list_tail = NULL;
		}
		*dlg_ka_list_head = dka->next;
		lock_release(dlg_ka_list_lock);

		/* send keep-alive for dka */
		dlg = dlg_get_by_iuid(&dka->iuid);
		if(dlg==NULL) {
			shm_free(dka);
			dka = NULL;
		} else {
			if(dka->iflags & DLG_IFLAG_KA_SRC)
				dlg_send_ka(dlg, DLG_CALLER_LEG, 0);
			if(dka->iflags & DLG_IFLAG_KA_DST)
				dlg_send_ka(dlg, DLG_CALLEE_LEG, 0);
			dlg_release(dlg);
		}
		/* append to tail */
		if(dka!=NULL)
		{
			lock_get(dlg_ka_list_lock);
			if(*dlg_ka_list_tail!=NULL)
				(*dlg_ka_list_tail)->next = dka;
			if(*dlg_ka_list_head==NULL)
				*dlg_ka_list_head = dka;
			*dlg_ka_list_tail = dka;
			lock_release(dlg_ka_list_lock);
		}
	}

	return 0;
}

/*!
 * \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;
}

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_release(dlg);
	}
	return 1;
}

/*!
 * \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);
}

static void rpc_end_dlg_entry_id(rpc_t *rpc, void *c) {
	unsigned int h_entry, h_id;
	dlg_cell_t * dlg = NULL;
	str rpc_extra_hdrs = {NULL,0};
	int n;

	n = rpc->scan(c, "dd", &h_entry, &h_id);
	if (n < 2) {
		LM_ERR("unable to read the parameters (%d)\n", n);
		rpc->fault(c, 500, "Invalid parameters");
		return;
	}
	if(rpc->scan(c, "*S", &rpc_extra_hdrs)<1)
	{
		rpc_extra_hdrs.s = NULL;
		rpc_extra_hdrs.len = 0;
	}

	dlg = dlg_lookup(h_entry, h_id);
	if(dlg==NULL) {
		rpc->fault(c, 404, "Dialog not found");
		return;
	}

	dlg_bye_all(dlg, (rpc_extra_hdrs.len>0)?&rpc_extra_hdrs:NULL);
	dlg_release(dlg);
}

static int w_dlg_set_property(struct sip_msg *msg, char *prop, char *s2)
{
	dlg_ctx_t *dctx;
	dlg_cell_t *d;
	str val;

	if(fixup_get_svalue(msg, (gparam_t*)prop, &val)!=0)
	{
		LM_ERR("no property value\n");
		return -1;
	}
	if(val.len<=0)
	{
		LM_ERR("empty property value\n");
		return -1;
	}
	if ( (dctx=dlg_get_dlg_ctx())==NULL )
		return -1;

	if(val.len==6 && strncmp(val.s, "ka-src", 6)==0) {
		dctx->iflags |= DLG_IFLAG_KA_SRC;
		d = dlg_get_by_iuid(&dctx->iuid);
		if(d!=NULL) {
			d->iflags |= DLG_IFLAG_KA_SRC;
			dlg_release(d);
		}
	} else if(val.len==6 && strncmp(val.s, "ka-dst", 6)==0) {
		dctx->iflags |= DLG_IFLAG_KA_DST;
		d = dlg_get_by_iuid(&dctx->iuid);
		if(d!=NULL) {
			d->iflags |= DLG_IFLAG_KA_DST;
			dlg_release(d);
		}
	} else if(val.len==15 && strncmp(val.s, "timeout-noreset", 15)==0) {
		dctx->iflags |= DLG_IFLAG_TIMER_NORESET;
		d = dlg_get_by_iuid(&dctx->iuid);
		if(d!=NULL) {
			d->iflags |= DLG_IFLAG_TIMER_NORESET;
			dlg_release(d);
		}
	} else {
		LM_ERR("unknown property value [%.*s]\n", val.len, val.s);
		return -1;
	}

	return 1;
}

int pv_get_dlg_variable(struct sip_msg *msg, pv_param_t *param, pv_value_t *res)
{

	dlg_cell_t *dlg;
	str * value;
	str spv;

	if (param==NULL || param->pvn.type!=PV_NAME_INTSTR
			|| param->pvn.u.isname.type!=AVP_NAME_STR
			|| param->pvn.u.isname.name.s.s==NULL) {
		LM_CRIT("BUG - bad parameters\n");
		return -1;
	}

	/* Retrieve the dialog for current message */
	dlg=dlg_get_msg_dialog( msg);

	if (dlg) {
		/* Lock the dialog */
		dlg_lock(d_table, &(d_table->entries[dlg->h_entry]));
	} else {
		/* Verify the local list */
		get_local_varlist_pointer(msg, 0);
	}

	/* dcm: todo - the value should be cloned for safe usage */
	value = get_dlg_variable_unsafe(dlg, &param->pvn.u.isname.name.s);

	spv.s = NULL;
	if(value) {
		spv.len = pv_get_buffer_size();
		if(spv.len<value->len+1) {
			LM_ERR("pv buffer too small (%d) - needed %d\n", spv.len, value->len);
		} else {
			spv.s = pv_get_buffer();
			strncpy(spv.s, value->s, value->len);
			spv.len = value->len;
			spv.s[spv.len] = '\0';
		}
	}

	print_lists(dlg);

	/* unlock dialog */
	if (dlg) {
		dlg_unlock(d_table, &(d_table->entries[dlg->h_entry]));
		dlg_release(dlg);
	}

	if (spv.s)
		return pv_get_strval(msg, param, res, &spv);


	return pv_get_null(msg, param, res);
}

static int w_dlg_get(struct sip_msg *msg, char *ci, char *ft, char *tt)
{
	dlg_cell_t *dlg = NULL;
	str sc = {0,0};
	str sf = {0,0};
	str st = {0,0};
	unsigned int dir = 0;

	if(ci==0 || ft==0 || tt==0)
	{
		LM_ERR("invalid parameters\n");
		return -1;
	}

	if(fixup_get_svalue(msg, (gparam_p)ci, &sc)!=0)
	{
		LM_ERR("unable to get Call-ID\n");
		return -1;
	}
	if(sc.s==NULL || sc.len == 0)
	{
		LM_ERR("invalid Call-ID parameter\n");
		return -1;
	}
	if(fixup_get_svalue(msg, (gparam_p)ft, &sf)!=0)
	{
		LM_ERR("unable to get From tag\n");
		return -1;
	}
	if(sf.s==NULL || sf.len == 0)
	{
		LM_ERR("invalid From tag parameter\n");
		return -1;
	}
	if(fixup_get_svalue(msg, (gparam_p)tt, &st)!=0)
	{
		LM_ERR("unable to get To Tag\n");
		return -1;
	}
	if(st.s==NULL || st.len == 0)
	{
		LM_ERR("invalid To tag parameter\n");
		return -1;
	}

	dlg = get_dlg(&sc, &sf, &st, &dir);
	if(dlg==NULL)
		return -1;
    /* set shorcut to dialog internal unique id */
	_dlg_ctx.iuid.h_entry = dlg->h_entry;
	_dlg_ctx.iuid.h_id = dlg->h_id;
	_dlg_ctx.dir = dir;
	dlg_release(dlg);
	return 1;
}

/*
 * Determine if message is in a dialog currently being tracked
 */
int	is_known_dlg(struct sip_msg *msg) {
	dlg_cell_t *dlg;

	dlg = dlg_get_msg_dialog(msg);
	
	if(dlg == NULL)
		return -1;

	dlg_release(dlg);

	return 1;
}