avpops_parse.c

性能优秀的SIP Proxy

/*
 * $Id: avpops_parse.c,v 1.8 2006/05/07 20:48:51 miconda Exp $
 *
 * Copyright (C) 2004 Voice Sistem SRL
 *
 * This file is part of Open SIP Express Router.
 *
 * AVPOPS OpenSER-module 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.
 *
 * AVPOPS OpenSER-module 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.
 *
 * For any questions about this software and its license, please contact
 * Voice Sistem at following e-mail address:
 *         [e-mail]
 *
 *
 * History:
 * ---------
 *  2004-10-04  first version (ramona)
 *  2004-11-11  DB scheme added (ramona)
 *  2004-11-17  aligned to new AVP core global aliases (ramona)
 */



#include <stdlib.h>
#include <ctype.h>

#include "../../ut.h"
#include "../../dprint.h"
#include "../../usr_avp.h"
#include "../../mem/mem.h"
#include "avpops_parse.h"


#define SCHEME_UUID_COL          "uuid_col"
#define SCHEME_UUID_COL_LEN      (sizeof(SCHEME_UUID_COL)-1)
#define SCHEME_USERNAME_COL      "username_col"
#define SCHEME_USERNAME_COL_LEN  (sizeof(SCHEME_USERNAME_COL)-1)
#define SCHEME_DOMAIN_COL        "domain_col"
#define SCHEME_DOMAIN_COL_LEN    (sizeof(SCHEME_DOMAIN_COL)-1)
#define SCHEME_VALUE_COL         "value_col"
#define SCHEME_VALUE_COL_LEN     (sizeof(SCHEME_VALUE_COL)-1)
#define SCHEME_TABLE             "table"
#define SCHEME_TABLE_LEN         (sizeof(SCHEME_TABLE)-1)
#define SCHEME_VAL_TYPE          "value_type"
#define SCHEME_VAL_TYPE_LEN      (sizeof(SCHEME_VAL_TYPE)-1)
#define SCHEME_INT_TYPE          "integer"
#define SCHEME_INT_TYPE_LEN      (sizeof(SCHEME_INT_TYPE)-1)
#define SCHEME_STR_TYPE          "string"
#define SCHEME_STR_TYPE_LEN      (sizeof(SCHEME_STR_TYPE)-1)


char *parse_avp_attr(char *s, struct fis_param *attr, char end)
{
	unsigned int uint;
	str tmp;

	/*DBG("s=%p s=%c(%d)\n",s,*s,*s);*/
	/* search for type identifier */
	if ( s[0] && s[1]==':' )
	{
		switch (s[0])
		{
			case 'i':
			case 'I':
				attr->opd |= AVPOPS_VAL_INT;
				break;
			case 's':
			case 'S':
				attr->opd |= AVPOPS_VAL_STR;
				break;
			default:
				LOG(L_ERR,"ERROR:avpops:parse_avp_attr: invalid type '%c'\n",
					s[0]);
				goto error;
		}
		s += 2;
	}
	/* search for the avp name */
	tmp.s = s;
	while ( *s && *s!=end && !isspace((int)*s)) s++;
	tmp.len = s - tmp.s;
	if (tmp.len==0)
	{
		attr->opd |= AVPOPS_VAL_NONE;
	} else {
		if ( attr->opd&AVPOPS_VAL_INT)
		{
			/* convert to ID (int) */
			if ( str2int( &tmp, &uint)==-1 )
			{
				LOG(L_ERR,"ERROR:avpops:parse_avp_attr: attribute is not "
					"int as type says <%s>\n", tmp.s);
				goto error;
			}
			attr->sval.p.val.s = 0;
			attr->sval.p.val.len = (int)uint;
		} else {
			/* duplicate name as str NULL terminated */
			attr->sval.p.val.s = (char*)pkg_malloc(tmp.len + 1);
			if (attr->sval.p.val.s==0)
			{
				LOG(L_ERR,"ERROR:avpops:parse_avp_attr: no more pkg mem\n");
				goto error;
			}
			attr->sval.p.val.len = tmp.len;
			memcpy(attr->sval.p.val.s, tmp.s, tmp.len);
			attr->sval.p.val.s[attr->sval.p.val.len] = 0;
		}
	}

	return s;
error:
	return 0;
}

struct fis_param *avpops_parse_pvar(char *s, int flags)
{
	struct fis_param *ap;
	char *p;

	/* compose the param structure */
	ap = (struct fis_param*)pkg_malloc(sizeof(struct fis_param));
	if (ap==0)
	{
		LOG(L_ERR,"ERROR:avpops:avpops_parse_pvar: no more pkg mem\n");
		return NULL;
	}
	memset( ap, 0, sizeof(struct fis_param));
	p = xl_parse_spec(s, &ap->sval, flags);
	if(p==0)
	{
		pkg_free(ap);
		return NULL;
	}

	ap->opd |= AVPOPS_VAL_PVAR;
	return ap;
}


int parse_avp_db(char *s, struct db_param *dbp, int allow_scheme)
{
	unsigned long ul;
	str   tmp;
	str   s0;
	char  have_scheme;
	char *p;
	char *p0;
	unsigned int flags;

	tmp.s = s;
	/* parse the attribute name - check first if it's not an alias */
	p0=strchr(tmp.s, '/');
	if(p0!=NULL)
		*p0=0;
	if ( *s!='$')
	{
		if(strlen(s)<1)
		{
			LOG(L_ERR,"ERROR:avops:parse_avp_db: bad param - "
				"expected : $avp(name), *, s or i value\n");
			return E_UNSPEC;
		}
		switch(*s) {
			case 's': case 'S':
				dbp->a.opd = AVPOPS_VAL_NONE|AVPOPS_VAL_STR;
			break;
			case 'i': case 'I':
				dbp->a.opd = AVPOPS_VAL_NONE|AVPOPS_VAL_INT;
			break;
			case '*': case 'a': case 'A':
				dbp->a.opd = AVPOPS_VAL_NONE;
			break;
			default:
				LOG(L_ERR,"ERROR:avops:parse_avp_db: bad param - "
					"expected : *, s or i AVP flag\n");
			return E_UNSPEC;
		}
		/* flags */
		flags = 0;
		if(*(s+1)!='\0')
		{
			s0.s = s+1;
			s0.len = strlen(s0.s);
			if(str2int(&s0, &flags)!=0)
			{
				LOG(L_ERR, "ERROR:avops:parse_avp_db:: error - bad avp flags\n");
				goto error;
			}
		}
		dbp->a.sval.flags |= flags<<24;
	} else {
		p = xl_parse_spec(s, &dbp->a.sval,
				XL_THROW_ERROR|XL_DISABLE_MULTI|XL_DISABLE_COLORS);
		if (p==0 || *p!='\0' || dbp->a.sval.type!=XL_AVP)
		{
			LOG(L_ERR,"ERROR:avops:parse_avp_db: bad param - "
				"expected : $avp(name) or int/str value\n");
			return E_UNSPEC;
		}
		if(dbp->a.sval.flags&XL_DPARAM)
		{
			dbp->a.opd = AVPOPS_VAL_PVAR;
		} else {
			dbp->a.opd = (dbp->a.sval.p.val.s)?AVPOPS_VAL_STR:AVPOPS_VAL_INT;
		}
	}

	/* optimize and keep the attribute name as str also to
	 * speed up db querie builds */
	if (!(dbp->a.opd&AVPOPS_VAL_PVAR) && !(dbp->a.opd&AVPOPS_VAL_NONE))
	{
		if (dbp->a.opd&AVPOPS_VAL_STR)
		{
			dbp->sa = dbp->a.sval.p.val;
			dbp->sa.s[dbp->sa.len] = '\0';
		} else {
			ul = (unsigned long)dbp->a.sval.p.val.len;
			tmp.s = int2str( ul, &(tmp.len) );
			dbp->sa.s = (char*)pkg_malloc( tmp.len + 1 );
			if (dbp->sa.s==0)
			{
				LOG(L_ERR,"ERROR:avpops:parse_avp_db: no more pkg mem\n");
				goto error;
			}
			memcpy( dbp->sa.s, tmp.s, tmp.len);
			dbp->sa.len = tmp.len;
			dbp->sa.s[dbp->sa.len] = 0;
		}
	}

	/* restore '/' */
	if(p0)
		*p0 = '/';
	/* is there a table name ? */
	s = p0;
	if (s && *s)
	{
		s++;
		if (*s=='$')
		{
			if (allow_scheme==0)
			{
				LOG(L_ERR,"ERROR:avpops:parse_avp_db: function doesn't "
					"support DB schemes\n");
				goto error;
			}
			if (dbp->a.opd&AVPOPS_VAL_NONE)
			{
				LOG(L_ERR,"ERROR:avpops:parse_avp_db: inconsistent usage of "
					"DB scheme without complet specification of AVP name\n");
				goto error;
			}
			have_scheme = 1;
			s++;
		} else {
			have_scheme = 0;
		}
		tmp.s = s;
		tmp.len = 0;
		while ( *s ) s++;
		tmp.len = s - tmp.s;
		if (tmp.len==0)
		{
			LOG(L_ERR,"ERROR:avpops:parse_av_dbp: empty scheme/table name\n");
			goto error;
		}
		if (have_scheme)
		{
			dbp->scheme = avp_get_db_scheme( tmp.s );
			if (dbp->scheme==0) 
			{
				LOG(L_ERR,"ERROR:avpops:parse_avp_db: scheme <%s> not found\n",
					tmp.s);
				goto error;
			}
			/* update scheme flags with AVP name type*/
			dbp->scheme->db_flags|=dbp->a.opd&AVPOPS_VAL_STR?AVP_NAME_STR:0;
		} else {
			/* duplicate table as str NULL terminated */
			dbp->table = (char*)pkg_malloc( tmp.len + 1 );
			if (dbp->table==0)
			{
				LOG(L_ERR,"ERROR:avpops:parse_avp_db: no more pkg mem\n");
				goto error;;
			}
			memcpy( dbp->table, tmp.s, tmp.len);
			dbp->table[tmp.len] = 0;
		}
	}

	return 0;
error:
	return -1;
}


struct fis_param* parse_intstr_value(char *p, int len)
{
	struct fis_param *vp;
	int uint;
	str val_str;
	int flags;

	if (p==0 || len==0)
			goto error;

	if (len>1 && *(p+1)==':')
	{
		if (*p=='i' || *p=='I')
			flags = AVPOPS_VAL_INT;
		else if (*p=='s' || *p=='S')
			flags = AVPOPS_VAL_STR;
		else
		{
			LOG(L_ERR,"ERROR:avpops:parse_intstr_value: unknown value type "
				"<%c>\n",*p);
			goto error;
		}
		p += 2;
		len -= 2;
		if (*p==0 || len<=0 )
		{
			LOG(L_ERR,"ERROR:avpops:parse_intstr_value: parse error arround "
				"<%.*s>\n",len,p);
				goto error;
		}
	} else {
		flags = AVPOPS_VAL_STR;
	}
	/* get the value */
	vp = (struct fis_param*)pkg_malloc(sizeof(struct fis_param));
	if (vp==0)
	{
		LOG(L_ERR,"ERROR:avpops:parse_intstr_value: no more pkg mem\n");
		goto error;;
	}
	memset( vp, 0, sizeof(struct fis_param));
	vp->opd = flags;
	val_str.s = p;
	val_str.len = len;
	if (flags&AVPOPS_VAL_INT) {
		/* convert the value to integer */
		if(val_str.len>2 && p[0]=='0' && (p[1]=='x' || p[1]=='X'))
		{
			if(hexstr2int(val_str.s+2, val_str.len-2, &uint))
			{
				LOG(L_ERR,"ERROR:avpops:parse_intstr_value: value is not hex"
					" int as type says <%.*s>\n", val_str.len, val_str.s);
				goto error;
			}
		} else {
			if(str2sint( &val_str, &uint)==-1)
			{
				LOG(L_ERR,"ERROR:avpops:parse_intstr_value: value is not int"
					" as type says <%.*s>\n", val_str.len, val_str.s);
				goto error;
			}
		}
		vp->sval.p.val.len = uint;
	} else {
		/* duplicate the value as string */
		vp->sval.p.val.s = (char*)pkg_malloc((val_str.len+1)*sizeof(char));
		if (vp->sval.p.val.s==0)
		{
			LOG(L_ERR,"ERROR:avpops:parse_intstr_value: no more pkg mem\n");
			goto error;
		}
		vp->sval.p.val.len = val_str.len;
		memcpy(vp->sval.p.val.s, val_str.s, val_str.len);
		vp->sval.p.val.s[vp->sval.p.val.len] = 0;
	}

	return vp;
error:
	return 0;
}


#define  duplicate_str(_p, _str, _error) \
	do { \
		_p = (char*)pkg_malloc(_str.len+1); \
		if (_p==0) \
		{ \
			LOG(L_ERR,"ERROR:avpops:parse_avp_sb_scheme: " \
				"no more pkg memory\n");\
			goto _error; \
		} \
		memcpy( _p, _str.s, _str.len); \
		_p[_str.len] = 0; \
	}while(0)

int parse_avp_db_scheme( char *s, struct db_scheme *scheme)
{
	str foo;
	str bar;
	char *p;

	if (s==0 || *s==0)
		goto error;