acc.c

性能优秀的SIP Proxy

/*
 * $Id: acc.c,v 1.16 2006/06/30 18:05:29 bogdan_iancu Exp $
 *
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * This file is part of openser, a free SIP server.
 *
 * openser 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
 *
 * openser 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * History:
 * --------
 * 2003-04-04  grand acc cleanup (jiri)
 * 2003-11-04  multidomain support for mysql introduced (jiri)
 * 2004-06-06  updated to the new DB api, cleanup: acc_db_{bind, init,close)
 *              added (andrei)
 * 2005-05-30  acc_extra patch commited (ramona)
 * 2005-06-28  multi leg call support added (bogdan)
 * 2006-01-13  detect_direction (for sequential requests) added (bogdan)
 */


#include <stdio.h>
#include <time.h>

#include "../../dprint.h"
#include "../../error.h"
#include "../../ut.h"      /* q_memchr */
#include "../../mem/mem.h"
#include "../../usr_avp.h"
#include "../../parser/hf.h"
#include "../../parser/msg_parser.h"
#include "../../parser/parse_from.h"
#include "../../parser/digest/digest.h"
#include "../tm/t_funcs.h"
#include "acc_mod.h"
#include "acc.h"
#include "acc_extra.h"
#include "dict.h"
#ifdef RAD_ACC
#include <radiusclient-ng.h>
#endif

#ifdef DIAM_ACC
#include "diam_dict.h"
#include "diam_message.h"
#include "diam_tcp.h"

#define AA_REQUEST 265
#define AA_ANSWER  265

#define ACCOUNTING_REQUEST 271
#define ACCOUNTING_ANSWER  271

#define M_NAME	"acc"
#endif

#define ATR(atr)  atr_arr[cnt].s=A_##atr;\
				atr_arr[cnt].len=A_##atr##_LEN;

static str na={NA, NA_LEN};

extern struct acc_extra *log_extra;

#ifdef RAD_ACC
/* caution: keep these aligned to RAD_ACC_FMT !! */
static int rad_attr[] = { A_CALLING_STATION_ID, A_CALLED_STATION_ID,
	A_SIP_TRANSLATED_REQUEST_URI, A_ACCT_SESSION_ID, A_SIP_TO_TAG,
	A_SIP_FROM_TAG, A_SIP_CSEQ };
extern struct acc_extra *rad_extra;
#endif

#ifdef DIAM_ACC
extern char *diameter_client_host;
extern int diameter_client_port;
extern struct acc_extra *dia_extra;

/* caution: keep these aligned to DIAM_ACC_FMT !! */
static int diam_attr[] = { AVP_SIP_FROM_URI, AVP_SIP_TO_URI, AVP_SIP_OURI, 
	AVP_SIP_CALLID, AVP_SIP_TO_TAG, AVP_SIP_FROM_TAG, AVP_SIP_CSEQ };
#endif

#ifdef SQL_ACC
static db_func_t acc_dbf;
static db_con_t* db_handle=0;
extern struct acc_extra *db_extra;
#endif


static inline struct hdr_field *valid_to( struct cell *t, 
				struct sip_msg *reply)
{
	if (reply==FAKED_REPLY || !reply || !reply->to) 
		return t->uas.request->to;
	return reply->to;
}

static inline str *cred_user(struct sip_msg *rq)
{
	struct hdr_field* h;
	auth_body_t* cred;

	get_authorized_cred(rq->proxy_auth, &h);
	if (!h) get_authorized_cred(rq->authorization, &h);
	if (!h) return 0;
	cred=(auth_body_t*)(h->parsed);
	if (!cred || !cred->digest.username.user.len) 
			return 0;
	return &cred->digest.username.user;
}

static inline str *cred_realm(struct sip_msg *rq)
{
	str* realm;
	struct hdr_field* h;
	auth_body_t* cred;

	get_authorized_cred(rq->proxy_auth, &h);
	if (!h) get_authorized_cred(rq->authorization, &h);
	if (!h) return 0;
	cred=(auth_body_t*)(h->parsed);
	if (!cred) return 0;
	realm = GET_REALM(&cred->digest);
	if (!realm->len || !realm->s) {
		return 0;
	}
	return realm;
}


/* create an array of str's for accounting using a formatting string;
 * this is the heart of the accounting module -- it prints whatever
 * requested in a way, that can be used for syslog, radius, 
 * sql, whatsoever */
static int fmt2strar( char *fmt, /* what would you like to account ? */
		struct sip_msg *rq, /* accounted message */
		struct hdr_field *to_hdr,
		str *phrase,
		int *total_len, /* total length of accounted values */
		int *attr_len,  /* total length of accounted attribute names */
		str **val_arr, /* that's the output -- must have MAX_ACC_COLUMNS */
		str *atr_arr)
{
#define get_from_to( _msg, _from, _to) \
	do{ \
		if (!from_to_set) {\
			if(_msg->msg_flags&FL_REQ_UPSTREAM){\
				DBG("DBUG:acc:fmt2strar: UPSTREAM flag set -> swap F/T\n"); \
				/* swap from and to */ \
				_from = to_hdr; \
				_to = _msg->from; \
			} else { \
				_from = _msg->from; \
				_to = to_hdr; \
			} \
			from_to_set = 1; \
		} \
	}while(0)

#define get_ft_body( _ft_hdr) ((struct to_body*)_ft_hdr->parsed)

	int cnt, tl, al;
	struct to_body *ft_body;
	static struct sip_uri f_puri;
	static struct sip_uri t_puri;
	static str mycode;
	str *cr;
	struct cseq_body *cseq;
	int from_to_set;
	struct hdr_field *from , *to;

	cnt=tl=al=0;
	from_to_set = 0;
	from = to = 0;

	/* we don't care about parsing here; either the function
	 * was called from script, in which case the wrapping function
	 * is supposed to parse, or from reply processing in which case
	 * TM should have preparsed from REQUEST_IN callback; what's not
	 * here is replaced with NA
	 */

	while(*fmt) {
		if (cnt==ALL_LOG_FMT_LEN) {
			LOG(L_ERR, "ERROR: fmt2strar: too long formatting string\n");
			return 0;
		}
		switch(*fmt) {
			case 'n': /* CSeq number */
				if (rq->cseq && (cseq=get_cseq(rq)) && cseq->number.len) 
					val_arr[cnt]=&cseq->number;
				else val_arr[cnt]=&na;
				ATR(CSEQ);
				break;
			case 'c':	/* Callid */
				val_arr[cnt]=rq->callid && rq->callid->body.len
						? &rq->callid->body : &na;
				ATR(CALLID);
				break;
			case 'i': /* incoming uri */
				val_arr[cnt]=&rq->first_line.u.request.uri;
				ATR(IURI);
				break;
			case 'm': /* method */
				val_arr[cnt]=&rq->first_line.u.request.method;
				ATR(METHOD);
				break;
			case 'o': /* outgoing uri */
				if (rq->new_uri.len) val_arr[cnt]=&rq->new_uri;
				else val_arr[cnt]=&rq->first_line.u.request.uri;
				ATR(OURI);
				break;
			case 'f': /* from-body */
				get_from_to( rq, from, to);
				val_arr[cnt]=(from && from->body.len) 
					? &from->body : &na;
				ATR(FROM);
				break;
			case 'r': /* from-tag */
				get_from_to( rq, from, to);
				if (from && (ft_body=get_ft_body(from))
							&& ft_body->tag_value.len) {
						val_arr[cnt]=&ft_body->tag_value;
				} else val_arr[cnt]=&na;
				ATR(FROMTAG);
				break;
			case 'U': /* digest, from-uri otherwise */
				cr=cred_user(rq);
				if (cr) {
					ATR(UID);
					val_arr[cnt]=cr;
					break;
				}
				/* fallback to from-uri if digest unavailable ... */
			case 'F': /* from-uri */
				get_from_to( rq, from, to);
				if (from && (ft_body=get_ft_body(from)) && ft_body->uri.len) {
						val_arr[cnt]=&ft_body->uri;
				} else val_arr[cnt]=&na;
				ATR(FROMURI);
				break;
			case '0': /* from-user */
				get_from_to( rq, from, to);
				val_arr[cnt]=&na;
				if (from && (ft_body=get_ft_body(from)) && ft_body->uri.len) {
					parse_uri(ft_body->uri.s, ft_body->uri.len, &f_puri);
					if (f_puri.user.len) 
							val_arr[cnt]=&f_puri.user;
				} 
				ATR(FROMUSER);
				break;
			case 'X': /* from-domain */
				get_from_to( rq, from, to);
				val_arr[cnt]=&na;
				if (from && (ft_body=get_ft_body(from)) && ft_body->uri.len) {
					parse_uri(ft_body->uri.s, ft_body->uri.len, &f_puri);
					if (f_puri.host.len) 
							val_arr[cnt]=&f_puri.host;
				} 
				ATR(FROMDOMAIN);
				break;
			case 't': /* to-body */
				get_from_to( rq, from, to);
				val_arr[cnt]=(to && to->body.len) ? &to->body : &na;
				ATR(TO);
				break;
			case 'd': /* to-tag */
				get_from_to( rq, from, to);
				val_arr[cnt]=(to && (ft_body=get_ft_body(to))
					&& ft_body->tag_value.len) ? &ft_body->tag_value : &na;
				ATR(TOTAG);
				break;
			case 'T': /* to-uri */
				get_from_to( rq, from, to);
				if (to && (ft_body=get_ft_body(to))
							&& ft_body->uri.len) {
						val_arr[cnt]=&ft_body->uri;
				} else val_arr[cnt]=&na;
				ATR(TOURI);
				break;
			case '1': /* to user */ 
				get_from_to( rq, from, to);
				val_arr[cnt]=&na;
				if (to && (ft_body=get_ft_body(to)) && ft_body->uri.len) {
					parse_uri(ft_body->uri.s, ft_body->uri.len, &t_puri);
					if (t_puri.user.len)
						val_arr[cnt]=&t_puri.user;
				} 
				ATR(TOUSER);
				break;
			case 'S':
				if (phrase->len>=3) {
					mycode.s=phrase->s;mycode.len=3;
					val_arr[cnt]=&mycode;
				} else val_arr[cnt]=&na;
				ATR(CODE);
				break;
			case 's':
				val_arr[cnt]=phrase;
				ATR(STATUS);
				break;
			case 'u':
				cr=cred_user(rq);
				val_arr[cnt]=cr?cr:&na;
				ATR(UID);
				break;
			case 'p': /* user part of request-uri */
				val_arr[cnt]=rq->parsed_orig_ruri.user.len ?
					& rq->parsed_orig_ruri.user : &na;
				ATR(UP_IURI);
				break;
			case 'D': /* domain part of request-uri */
				val_arr[cnt]=rq->parsed_orig_ruri.host.len ?
					& rq->parsed_orig_ruri.host : &na;
				ATR(RURI_DOMAIN);
				break;
			default:
				LOG(L_CRIT, "BUG: acc_log_request: unknown char: %c\n",
					*fmt);
				return 0;
		} /* switch (*fmt) */
		tl+=val_arr[cnt]->len;
		al+=atr_arr[cnt].len;
		fmt++;
		cnt++;
	} /* while (*fmt) */
	*total_len=tl;
	*attr_len=al;
	return cnt;
}

/****************************************************
 *        macros for embedded multi-leg logging
 ****************************************************/
#define leg_loop_VARS \
	struct usr_avp *dst; \
	struct usr_avp *src; \
	int_str dst_val; \
	int_str src_val; \


#define BEGIN_loop_all_legs \
	src = search_first_avp(0,(int_str)src_avp_id,&src_val,0); \
	dst = search_first_avp(0,(int_str)dst_avp_id,&dst_val,0); \
	do { \
		while (src && (src->flags&AVP_VAL_STR)==0 ) \
			src = search_next_avp(src,&src_val); \
		while (dst && (dst->flags&AVP_VAL_STR)==0 ) \
			dst = search_next_avp(dst,&dst_val);

#define END_loop_all_legs \
		src = src?search_next_avp(src,&src_val):0; \
		dst = dst?search_next_avp(dst,&dst_val):0; \
	}while(src||dst);



	/* skip leading text and begin with first item's
	 * separator ", " which will be overwritten by the
	 * leading text later 
	 * */
/********************************************
 *        acc_request
 ********************************************/
#define MAX_LOG_SIZE  65536
int acc_log_request( struct sip_msg *rq, struct hdr_field *to, 
				str *txt, str *phrase)
{
	static char log_msg[MAX_LOG_SIZE];
	static str* val_arr[ALL_LOG_FMT_LEN+MAX_ACC_EXTRA];
	static str atr_arr[ALL_LOG_FMT_LEN+MAX_ACC_EXTRA];
	int len;
	char *p;
	int attr_cnt;
	int attr_len;
	int i;
	leg_loop_VARS;

	if (skip_cancel(rq)) return 1;

	attr_cnt=fmt2strar( log_fmt, rq, to, phrase, 
					&len, &attr_len, val_arr, atr_arr);
	if (!attr_cnt) {
		LOG(L_ERR, "ERROR:acc:acc_log_request: fmt2strar failed\n");
		return -1;
	}
	attr_cnt += extra2strar( log_extra, rq,
		&len, &attr_len,
		atr_arr+attr_cnt, val_arr+attr_cnt);
	
	if ( MAX_LOG_SIZE < len+ attr_len+ACC_LEN+txt->len+A_EOL_LEN 
	+ attr_cnt*(A_SEPARATOR_LEN+A_EQ_LEN)-A_SEPARATOR_LEN) {
		LOG(L_ERR, "ERROR:acc:acc_log_request: buffer to small\n");
		return -1;
	}

	/* skip leading text and begin with first item's
	 * separator ", " which will be overwritten by the
	 * leading text later 
	 * */
	p=log_msg+(ACC_LEN+txt->len-A_SEPARATOR_LEN);
	for (i=0; i<attr_cnt; i++) {
		memcpy(p, A_SEPARATOR, A_SEPARATOR_LEN );
		p+=A_SEPARATOR_LEN;
		memcpy(p, atr_arr[i].s, atr_arr[i].len);
		p+=atr_arr[i].len;
		memcpy(p, A_EQ, A_EQ_LEN);
		p+=A_EQ_LEN;
		memcpy(p, val_arr[i]->s, val_arr[i]->len);
		p+=val_arr[i]->len;
	}

	if ( multileg_enabled ) {
		BEGIN_loop_all_legs;
		if (p+A_SEPARATOR_LEN+7+A_EQ_LEN+A_SEPARATOR_LEN+7+A_EQ_LEN
		+(src?src_val.s.len:NA_LEN)+(dst?dst_val.s.len:NA_LEN) >
		log_msg+MAX_LOG_SIZE ) {
			LOG(L_ERR, "ERROR:acc:acc_log_request: buffer to small\n");
			return -1;
		}
		if (src) {
			memcpy(p, A_SEPARATOR"src_leg"A_EQ, A_SEPARATOR_LEN+7+A_EQ_LEN );
			p+=A_SEPARATOR_LEN+7+A_EQ_LEN;
			memcpy(p, src_val.s.s, src_val.s.len);
			p+=src_val.s.len;
		} else {
			memcpy(p, A_SEPARATOR"src_leg"A_EQ NA,
				A_SEPARATOR_LEN+7+A_EQ_LEN+NA_LEN);
			p+=A_SEPARATOR_LEN+7+A_EQ_LEN+NA_LEN;
		}
		if (dst) {
			memcpy(p, A_SEPARATOR"dst_leg"A_EQ, A_SEPARATOR_LEN+7+A_EQ_LEN );
			p+=A_SEPARATOR_LEN+7+A_EQ_LEN;
			memcpy(p, dst_val.s.s, dst_val.s.len);
			p+=dst_val.s.len;
		} else {
			memcpy(p, A_SEPARATOR"dst_leg"A_EQ NA,