acc_mod.c

来自「性能优秀的SIP Proxy」· C语言 代码 · 共 853 行 · 第 1/2 页

	attrs[A_SIP_METHOD].n			= "Sip-Method";
	attrs[A_USER_NAME].n			= "User-Name";
	attrs[A_TIME_STAMP].n			= "Event-Timestamp";
	if (multileg_enabled) {
		attrs[A_SRC_LEG].n			= "Sip-Leg-Source";
		attrs[A_DST_LEG].n			= "Sip-Leg-Destination";
	}
	vals[V_STATUS_START].n			= "Start";
	vals[V_STATUS_STOP].n			= "Stop";
	vals[V_STATUS_FAILED].n			= "Failed";
	vals[V_SIP_SESSION].n			= "Sip-Session";
	/* add and count the extras as attributes */
	nr_extra_rad = extra2attrs( rad_extra, attrs, A_MAX);

	/* read config */
	if ((rh = rc_read_config(radius_config)) == NULL) {
		LOG(L_ERR, "ERROR: acc: error opening radius config file: %s\n", 
			radius_config );
		return -1;
	}
	/* read dictionary */
	if (rc_read_dictionary(rh, rc_conf_str(rh, "dictionary"))!=0) {
		LOG(L_ERR, "ERROR: acc: error reading radius dictionary\n");
		return -1;
	}

	INIT_AV(rh, attrs, A_MAX+nr_extra_rad, vals, "acc", -1, -1);

	if (service_type != -1)
		vals[V_SIP_SESSION].v = service_type;
#endif

#ifdef DIAM_ACC
	/* parse the extra string, if any */
	if (dia_extra_str && (dia_extra=parse_acc_extra(dia_extra_str))==0 ) {
		LOG(L_ERR,"ERROR:acc:mod_init: failed to parse dia_extra param\n");
		return -1;
	}

	if (extra2int(dia_extra)!=0) {
		LOG(L_ERR,"ERROR:acc:mod_init: extar names for DIAMTER must be "
			" integer AVP codes\n");
		return -1;
	}
#endif
	return 0;
}



static int child_init(int rank)
{
#ifdef SQL_ACC
	if (db_url && acc_db_init(db_url)<0)
		return -1;
#endif

	/* DIAMETER */
#ifdef DIAM_ACC
	/* open TCP connection */
	DBG(M_NAME": Initializing TCP connection\n");

	sockfd = init_mytcp(diameter_client_host, diameter_client_port);
	if(sockfd==-1) 
	{
		DBG(M_NAME": TCP connection not established\n");
		return -1;
	}

	DBG(M_NAME": TCP connection established on sockfd=%d\n", sockfd);

	/* every child with its buffer */
	rb = (rd_buf_t*)pkg_malloc(sizeof(rd_buf_t));
	if(!rb)
	{
		DBG("acc: mod_child_init: no more free memory\n");
		return -1;
	}
	rb->buf = 0;

#endif

	return 0;
}



static void destroy(void)
{
	if (log_extra)
		destroy_extras( log_extra);
#ifdef SQL_ACC
	acc_db_close();
	if (db_extra)
		destroy_extras( db_extra);
#endif
#ifdef RAD_ACC
	if (rad_extra)
		destroy_extras( rad_extra);
#endif
#ifdef DIAM_ACC
	close_tcp_connection(sockfd);
	if (dia_extra)
		destroy_extras( dia_extra);
#endif
}



static inline void acc_preparse_req(struct sip_msg *rq)
{
	/* try to parse from for From-tag for accounted transactions; 
	 * don't be worried about parsing outcome -- if it failed, 
	 * we will report N/A
	 */
	parse_headers(rq, HDR_CALLID_F| HDR_FROM_F| HDR_TO_F, 0 );
	parse_from_header(rq);

	if (strchr(log_fmt, 'p') || strchr(log_fmt, 'D')) {
		parse_orig_ruri(rq);
	}
}



/* prepare message and transaction context for later accounting */
static void acc_onreq( struct cell* t, int type, struct tmcb_params *ps )
{
	int tmcb_types;

	if (is_acc_on(ps->req) || is_mc_on(ps->req)) {
		/* install additional handlers */
		tmcb_types =
			/* report on completed transactions */
			TMCB_RESPONSE_OUT |
			/* account e2e acks if configured to do so */
			(report_ack?TMCB_E2EACK_IN:0) |
			/* get incoming replies ready for processing */
			TMCB_RESPONSE_IN |
			/* report on missed calls */
			((ps->req->REQ_METHOD!=METHOD_CANCEL && is_mc_on(ps->req))?
				TMCB_ON_FAILURE:0) ;
		if (tmb.register_tmcb( 0, t, tmcb_types, tmcb_func, 0 )<=0) {
			LOG(L_ERR,"ERROR:acc:acc_onreq: cannot register additional "
				"callbacks\n");
			return;
		}
		/* do some parsing in advance */
		acc_preparse_req(ps->req);
		/* also, if that is INVITE, disallow silent t-drop */
		if (ps->req->REQ_METHOD==METHOD_INVITE) {
			DBG("DEBUG: noisy_timer set for accounting\n");
			t->flags |= T_NOISY_CTIMER_FLAG;
		}
		/* if required, determine request direction */
		if( detect_direction && !rrb.is_direction(ps->req,RR_FLOW_UPSTREAM) ) {
			DBG("DBUG:acc:acc_onreq: UPSTREAM req detected -> flaging it\n");
			ps->req->msg_flags |= FL_REQ_UPSTREAM;
		}
	}
}


/* is this reply of interest for accounting ? */
static inline int should_acc_reply(struct sip_msg *req, int code)
{
	/* validation */
	if (req==0) {
		LOG(L_ERR, "ERROR: acc: should_acc_reply: 0 request\n");
		return 0;
	}

	/* negative transactions reported otherwise only if explicitly 
	 * demanded */
	if (!is_failed_acc_on(req) && code >=300) return 0;
	if (!is_acc_on(req))
		return 0;
	if (skip_cancel(req))
		return 0;
	if (code < 200 && ! (early_media && code==183))
		return 0;

	return 1; /* seed is through, we will account this reply */
}

/* parse incoming replies before cloning */
static inline void acc_onreply_in(struct cell *t, struct sip_msg *req,
											struct sip_msg *reply, int code)
{
	/* validation */
	if (req==0) {
		LOG(L_ERR, "ERROR: acc: should_acc_reply: 0 request\n");
		return;
	}

	/* don't parse replies in which we are not interested */
	/* missed calls enabled ? */
	if ( (reply && reply!=FAKED_REPLY) && (should_acc_reply(req,code)
	|| (is_invite(t) && code>=300 && is_mc_on(req))) ) {
		parse_headers(reply, HDR_TO_F, 0 );
	}
}

/* initiate a report if we previously enabled MC accounting for this t */
static inline void on_missed(struct cell *t, struct sip_msg *req,
											struct sip_msg *reply, int code)
{
	int reset_lmf; 
#ifdef SQL_ACC
	int reset_dmf;
#endif
#ifdef RAD_ACC
	int reset_rmf;
#endif
/* DIAMETER */
#ifdef DIAM_ACC
	int reset_dimf;
#endif
	str new_uri_bk;

	/* validation */
	if (req==0) {
		DBG("DBG: acc: on_missed: no request, local t; skipping\n");
		return;
	}

	if (is_invite(t) && code>=300) {
		/* set as new_uri the last branch */
		new_uri_bk = req->new_uri;
		req->new_uri = t->uac[t->nr_of_outgoings-1].uri;

		if (is_log_mc_on(req)) {
			acc_log_missed( t, req, reply, code);
			reset_lmf=1;
		} else reset_lmf=0;
#ifdef SQL_ACC
		if (db_url && is_db_mc_on(req)) {
			acc_db_missed( t, req, reply, code);
			reset_dmf=1;
		} else reset_dmf=0;
#endif
#ifdef RAD_ACC
		if (is_rad_mc_on(req)) {
			acc_rad_missed(t, req, reply, code );
			reset_rmf=1;
		} else reset_rmf=0;
#endif
/* DIAMETER */
#ifdef DIAM_ACC
		if (is_diam_mc_on(req)) {
			acc_diam_missed(t, req, reply, code );
			reset_dimf=1;
		} else reset_dimf=0;
#endif
		req->new_uri = new_uri_bk;

		/* we report on missed calls when the first
		 * forwarding attempt fails; we do not wish to
		 * report on every attempt; so we clear the flags; 
		 * we do it after all reporting is over to be sure
		 * that all reporting functions got a fair chance
		 */
		if (reset_lmf) resetflag(req, log_missed_flag);
#ifdef SQL_ACC
		if (reset_dmf) resetflag(req, db_missed_flag);
#endif
#ifdef RAD_ACC
		if (reset_rmf) resetflag(req, radius_missed_flag);
#endif
/* DIAMETER */
#ifdef DIAM_ACC
		if (reset_dimf) resetflag(req, diameter_missed_flag);
#endif
	}
}


/* initiate a report if we previously enabled accounting for this t */
static inline void acc_onreply( struct cell* t, struct sip_msg *req,
											struct sip_msg *reply, int code)
{
	str new_uri_bk;

	/* validation */
	if (req==0) {
		DBG("DBG: acc: onreply: no request, local t; skipping\n");
		return;
	}

	/* acc_onreply is bound to TMCB_REPLY which may be called
	   from _reply, like when FR hits; we should not miss this
	   event for missed calls either */
	on_missed(t, req, reply, code);

	/* for reply processing, set as new_uri the winning branch */
	if (t->relaied_reply_branch>=0) {
		new_uri_bk = req->new_uri;
		req->new_uri = t->uac[t->relaied_reply_branch].uri;
	} else {
		new_uri_bk.len = -1;
		new_uri_bk.s = 0;
	}

	if (!should_acc_reply(req, code)) return;
	if ( is_log_acc_on(req) )
		acc_log_reply(t, req, reply, code);
#ifdef SQL_ACC
	if (db_url && is_db_acc_on(req))
		acc_db_reply(t, req, reply, code);
#endif
#ifdef RAD_ACC
	if (is_rad_acc_on(req))
		acc_rad_reply(t, req, reply, code);
#endif
/* DIAMETER */
#ifdef DIAM_ACC
	if (is_diam_acc_on(req))
		acc_diam_reply(t, req, reply, code);
#endif

	if (new_uri_bk.len>=0)
		req->new_uri = new_uri_bk;
}



static inline void acc_onack( struct cell* t, struct sip_msg *req,
		struct sip_msg *ack, int code)
{
	/* only for those guys who insist on seeing ACKs as well */
	if (!report_ack) return;
	/* if acc enabled for flagged transaction, check if flag matches */
	if (is_log_acc_on(req)) {
		acc_preparse_req(ack);
		acc_log_ack(t, req, ack);
	}
#ifdef SQL_ACC
	if (db_url && is_db_acc_on(req)) {
		acc_preparse_req(ack);
		acc_db_ack(t, req, ack);
	}
#endif
#ifdef RAD_ACC
	if (is_rad_acc_on(req)) {
		acc_preparse_req(ack);
		acc_rad_ack(t, req, ack);
	}
#endif
/* DIAMETER */
#ifdef DIAM_ACC
	if (is_diam_acc_on(req)) {
		acc_preparse_req(ack);
		acc_diam_ack(t,ack);
	}
#endif
	
}


static void tmcb_func( struct cell* t, int type, struct tmcb_params *ps )
{
	if (type&TMCB_RESPONSE_OUT) {
		acc_onreply( t, ps->req, ps->rpl, ps->code);
	} else if (type&TMCB_E2EACK_IN) {
		acc_onack( t, t->uas.request, ps->req, ps->code);
	} else if (type&TMCB_ON_FAILURE) {
		on_missed( t, ps->req, ps->rpl, ps->code);
	} else if (type&TMCB_RESPONSE_IN) {
		acc_onreply_in( t, ps->req, ps->rpl, ps->code);
	}
}


/* these wrappers parse all what may be needed; they don't care about
 * the result -- accounting functions just display "unavailable" if there
 * is nothing meaningful
 */
static int w_acc_log_request(struct sip_msg *rq, char *comment, char *foo)
{
	str txt;

	txt.s=ACC_REQUEST;
	txt.len=ACC_REQUEST_LEN;
	acc_preparse_req(rq);
	return acc_log_request(rq, rq->to, &txt, (str*)comment);
}


#ifdef SQL_ACC
static int w_acc_db_request(struct sip_msg *rq, char *comment, char *table)
{
	if (!db_url) {
		LOG(L_ERR,"ERROR:acc:w_acc_db_request: DB support not configured\n");
		return -1;
	}
	acc_preparse_req(rq);
	return acc_db_request(rq, rq->to, (str*)comment, table, SQL_MC_FMT );
}
#endif


#ifdef RAD_ACC
static int w_acc_rad_request(struct sip_msg *rq, char *comment, 
				char *foo)
{
	acc_preparse_req(rq);
	return acc_rad_request(rq, rq->to, (str*)comment);
}
#endif


/* DIAMETER */
#ifdef DIAM_ACC
static int w_acc_diam_request(struct sip_msg *rq, char *comment, 
				char *foo)
{
	str phrase;

	phrase.s=comment;
	phrase.len=strlen(comment);	/* fix_param would be faster! */
	acc_preparse_req(rq);
	return acc_diam_request(rq, rq->to, (str*)comment);
}
#endif