/*
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * This file is part of Kamailio, a free SIP server.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 *
 * Kamailio 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
 *
 * Kamailio 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

/*! \file
 *  \brief USRLOC - Usrloc contact handling functions
 *  \ingroup usrloc
 *
 * - Module: \ref usrloc
 */

#include "ucontact.h"
#include <string.h> /* memcpy */
#include "../../core/mem/shm_mem.h"
#include "../../core/ut.h"
#include "../../core/ip_addr.h"
#include "../../core/socket_info.h"
#include "../../core/dprint.h"
#include "../../lib/srdb1/db.h"
#include "p_usrloc_mod.h"
#include "../usrloc/ul_callback.h"
#include "urecord.h"
#include "ul_db_layer.h"
#include "dlist.h"
#include "config.h"


/*!
 * \brief Create a new contact structure
 * \param _dom domain
 * \param _aor address of record
 * \param _contact contact string
 * \param _ci contact informations
 * \return new created contact on success, 0 on failure
 */
ucontact_t *new_ucontact(
		str *_dom, str *_aor, str *_contact, ucontact_info_t *_ci)
{
	ucontact_t *c;

	c = (ucontact_t *)shm_malloc(sizeof(ucontact_t));
	if(!c) {
		LM_ERR("no more shm memory\n");
		return 0;
	}
	memset(c, 0, sizeof(ucontact_t));

	if(_contact->s && _contact->len > 0) {
		if(shm_str_dup(&c->c, _contact) < 0)
			goto error;
	}

	if(_ci->callid->s && _ci->callid->len > 0) {
		if(shm_str_dup(&c->callid, _ci->callid) < 0)
			goto error;
	}

	if(_ci->user_agent->s && _ci->user_agent->len > 0) {
		if(shm_str_dup(&c->user_agent, _ci->user_agent) < 0)
			goto error;
	}

	if(_ci->received.s && _ci->received.len > 0) {
		if(shm_str_dup(&c->received, &_ci->received) < 0)
			goto error;
	}

	if(_ci->path && _ci->path->len > 0) {
		if(shm_str_dup(&c->path, _ci->path) < 0)
			goto error;
	}

	if(_ci->ruid.s && _ci->ruid.len > 0) {
		if(shm_str_dup(&c->ruid, &_ci->ruid) < 0)
			goto error;
	}

	if(_ci->instance.s && _ci->instance.len > 0) {
		if(shm_str_dup(&c->instance, &_ci->instance) < 0)
			goto error;
	}

	c->domain = _dom;
	c->aor = _aor;
	c->expires = _ci->expires;
	c->q = _ci->q;
	c->sock = _ci->sock;
	c->cseq = _ci->cseq;
	c->state = CS_NEW;
	c->flags = _ci->flags;
	c->cflags = _ci->cflags;
	c->methods = _ci->methods;
	c->reg_id = _ci->reg_id;
	c->last_modified = _ci->last_modified;

	return c;
error:
	LM_ERR("no more shm memory\n");
	if(c->path.s)
		shm_free(c->path.s);
	if(c->received.s)
		shm_free(c->received.s);
	if(c->user_agent.s)
		shm_free(c->user_agent.s);
	if(c->callid.s)
		shm_free(c->callid.s);
	if(c->c.s)
		shm_free(c->c.s);
	if(c->ruid.s)
		shm_free(c->ruid.s);
	if(c->instance.s)
		shm_free(c->instance.s);
	shm_free(c);
	return 0;
}


/*!
 * \brief Free all memory associated with given contact structure
 * \param _c freed contact
 */
void free_ucontact(ucontact_t *_c)
{
	if(!_c)
		return;
	if(_c->path.s)
		shm_free(_c->path.s);
	if(_c->received.s)
		shm_free(_c->received.s);
	if(_c->user_agent.s)
		shm_free(_c->user_agent.s);
	if(_c->callid.s)
		shm_free(_c->callid.s);
	if(_c->c.s)
		shm_free(_c->c.s);
	if(_c->ruid.s)
		shm_free(_c->ruid.s);
	if(_c->instance.s)
		shm_free(_c->instance.s);
	shm_free(_c);
}


/*!
 * \brief Print contact, for debugging purposes only
 * \param _f output file
 * \param _c printed contact
 */
void print_ucontact(FILE *_f, ucontact_t *_c)
{
	time_t t = time(0);
	char *st;

	switch(_c->state) {
		case CS_NEW:
			st = "CS_NEW";
			break;
		case CS_SYNC:
			st = "CS_SYNC";
			break;
		case CS_DIRTY:
			st = "CS_DIRTY";
			break;
		default:
			st = "CS_UNKNOWN";
			break;
	}

	fprintf(_f, "~~~Contact(%p)~~~\n", _c);
	fprintf(_f, "domain    : '%.*s'\n", _c->domain->len, ZSW(_c->domain->s));
	fprintf(_f, "aor       : '%.*s'\n", _c->aor->len, ZSW(_c->aor->s));
	fprintf(_f, "Contact   : '%.*s'\n", _c->c.len, ZSW(_c->c.s));
	fprintf(_f, "Expires   : ");
	if(_c->expires == 0) {
		fprintf(_f, "Permanent\n");
	} else if(_c->expires == UL_EXPIRED_TIME) {
		fprintf(_f, "Deleted\n");
	} else if(t > _c->expires) {
		fprintf(_f, "Expired\n");
	} else {
		fprintf(_f, "%u\n", (unsigned int)(_c->expires - t));
	}
	fprintf(_f, "q         : %s\n", q2str(_c->q, 0));
	fprintf(_f, "Call-ID   : '%.*s'\n", _c->callid.len, ZSW(_c->callid.s));
	fprintf(_f, "CSeq      : %d\n", _c->cseq);
	fprintf(_f, "User-Agent: '%.*s'\n", _c->user_agent.len,
			ZSW(_c->user_agent.s));
	fprintf(_f, "received  : '%.*s'\n", _c->received.len, ZSW(_c->received.s));
	fprintf(_f, "Path      : '%.*s'\n", _c->path.len, ZSW(_c->path.s));
	fprintf(_f, "State     : %s\n", st);
	fprintf(_f, "Flags     : %u\n", _c->flags);
	if(_c->sock) {
		fprintf(_f, "Sock      : %.*s (%p)\n", _c->sock->sock_str.len,
				_c->sock->sock_str.s, _c->sock);
	} else {
		fprintf(_f, "Sock      : none (null)\n");
	}
	fprintf(_f, "Methods   : %u\n", _c->methods);
	fprintf(_f, "ruid      : '%.*s'\n", _c->ruid.len, ZSW(_c->ruid.s));
	fprintf(_f, "instance  : '%.*s'\n", _c->instance.len, ZSW(_c->instance.s));
	fprintf(_f, "reg-id    : %u\n", _c->reg_id);
	fprintf(_f, "next      : %p\n", _c->next);
	fprintf(_f, "prev      : %p\n", _c->prev);
	fprintf(_f, "~~~/Contact~~~~\n");
}


/*!
 * \brief Update existing contact in memory with new values
 * \param _c contact
 * \param _ci contact informations
 * \return 0 on success, -1 on failure
 */
int mem_update_ucontact(ucontact_t *_c, ucontact_info_t *_ci)
{
#define update_str(_old, _new)                         \
	do {                                               \
		if((_old)->len < (_new)->len) {                \
			ptr = (char *)shm_malloc((_new)->len);     \
			if(ptr == 0) {                             \
				LM_ERR("no more shm memory\n");        \
				return -1;                             \
			}                                          \
			memcpy(ptr, (_new)->s, (_new)->len);       \
			if((_old)->s)                              \
				shm_free((_old)->s);                   \
			(_old)->s = ptr;                           \
		} else {                                       \
			memcpy((_old)->s, (_new)->s, (_new)->len); \
		}                                              \
		(_old)->len = (_new)->len;                     \
	} while(0)

	char *ptr;

	/* Update gruu */
	if(_ci->instance.s != NULL && _ci->instance.len > 0) {
		update_str(&_c->instance, &_ci->instance);
	}
	/* Update contact */
	if(_ci->c != NULL && _ci->c->s != NULL && _ci->c->len > 0) {
		update_str(&_c->c, _ci->c);
	}
	/* Update callid */
	if(_ci->callid != NULL && _ci->callid->s != NULL && _ci->callid->len > 0) {
		update_str(&_c->callid, _ci->callid);
	}

	/* No need to update Callid as it is constant
	 * per ucontact (set at insert time)  -bogdan */

	update_str(&_c->user_agent, _ci->user_agent);

	if(_ci->received.s && _ci->received.len) {
		update_str(&_c->received, &_ci->received);
	} else {
		if(_c->received.s)
			shm_free(_c->received.s);
		_c->received.s = 0;
		_c->received.len = 0;
	}

	if(_ci->path) {
		update_str(&_c->path, _ci->path);
	} else {
		if(_c->path.s)
			shm_free(_c->path.s);
		_c->path.s = 0;
		_c->path.len = 0;
	}

	_c->sock = _ci->sock;
	_c->expires = _ci->expires;
	_c->q = _ci->q;
	_c->cseq = _ci->cseq;
	_c->methods = _ci->methods;
	_c->last_modified = _ci->last_modified;
	_c->flags = _ci->flags;
	_c->cflags = _ci->cflags;

	return 0;
}


/* ================ State related functions =============== */

/*!
 * \brief Update state of the contact if we are using write-back scheme
 * \param _c updated contact
 */
void st_update_ucontact(ucontact_t *_c)
{
	switch(_c->state) {
		case CS_NEW:
			/* Contact is new and is not in the database yet,
			  * we remain in the same state here because the
			  * contact must be inserted later in the timer
			  */
			break;

		case CS_SYNC:
			/* For db mode 1 & 2 a modified contact needs to be
			  * updated also in the database, so transit into
			  * CS_DIRTY and let the timer to do the update
			  * again. For db mode 1 we try to update right
			  * now and if fails, let the timer to do the job
			  */
			if(db_mode == WRITE_BACK || db_mode == WRITE_THROUGH) {
				_c->state = CS_DIRTY;
			}
			break;

		case CS_DIRTY:
			/* Modification of dirty contact results in
			  * dirty contact again, don't change anything
			  */
			break;
	}
}


/*!
 * \brief Update state of the contact
 * \param _c updated contact
 * \return 1 if the contact should be deleted from memory immediately, 0 otherwise
 */
int st_delete_ucontact(ucontact_t *_c)
{
	switch(_c->state) {
		case CS_NEW:
			/* Contact is new and isn't in the database
		      * yet, we can delete it from the memory
		      * safely.
		      */
			return 1;

		case CS_SYNC:
		case CS_DIRTY:
			/* Contact is in the database,
		      * we cannot remove it from the memory
		      * directly, but we can set expires to zero
		      * and the timer will take care of deleting
		      * the contact from the memory as well as
		      * from the database
		      */
			if(db_mode == WRITE_BACK) {
				_c->expires = UL_EXPIRED_TIME;
				return 0;
			} else {
				/* WRITE_THROUGH or NO_DB -- we can
			      * remove it from memory immediately and
			      * the calling function would also remove
			      * it from the database if needed
			      */
				return 1;
			}
	}

	return 0; /* Makes gcc happy */
}


/*!
 * \brief Called when the timer is about to delete an expired contact
 * \param _c expired contact
 * \return 1 if the contact should be removed from the database and 0 otherwise
 */
int st_expired_ucontact(ucontact_t *_c)
{
	/* There is no need to change contact
	      * state, because the contact will
	      * be deleted anyway
	      */

	switch(_c->state) {
		case CS_NEW:
			/* Contact is not in the database
		      * yet, remove it from memory only
		      */
			return 0;

		case CS_SYNC:
		case CS_DIRTY:
			/* Remove from database here */
			return 1;
	}

	return 0; /* Makes gcc happy */
}


/*!
 * \brief Called when the timer is about flushing the contact, updates contact state
 * \param _c flushed contact
 * \return 1 if the contact should be inserted, 2 if update and 0 otherwise
 */
int st_flush_ucontact(ucontact_t *_c)
{
	switch(_c->state) {
		case CS_NEW:
			/* Contact is new and is not in
		      * the database yet so we have
		      * to insert it
		      */
			_c->state = CS_SYNC;
			return 1;

		case CS_SYNC:
			/* Contact is synchronized, do
		      * nothing
		      */
			return 0;

		case CS_DIRTY:
			/* Contact has been modified and
		      * is in the db already so we
		      * have to update it
		      */
			_c->state = CS_SYNC;
			return 2;
	}

	return 0; /* Makes gcc happy */
}


/* ============== Database related functions ================ */

/*!
 * \brief Insert contact into the database
 * \param _c inserted contact
 * \return 0 on success, -1 on failure
 */
int db_insert_ucontact(ucontact_t *_c)
{
	char *dom;
	db_key_t keys[18];
	db_val_t vals[18];
	int nr_cols = 0;

	int nr_cols_key = 0;
	struct udomain *_d;
	str user = {0, 0};
	str domain = {0, 0};

	if(_c->flags & FL_MEM) {
		return 0;
	}

	if(register_udomain(_c->domain->s, &_d) < 0) {
		return -1;
	}
	LM_INFO("Domain set for contact %.*s\n", _c->domain->len, _c->domain->s);

	keys[nr_cols] = &user_col;
	vals[nr_cols].type = DB1_STR;
	vals[nr_cols].nul = 0;
	vals[nr_cols].val.str_val = *_c->aor;
	nr_cols++;

	keys[nr_cols] = &contact_col;
	vals[nr_cols].type = DB1_STR;
	vals[nr_cols].nul = 0;
	vals[nr_cols].val.str_val = _c->c;
	nr_cols++;

	if(use_domain) {
		keys[nr_cols] = &domain_col;
		vals[nr_cols].type = DB1_STR;
		vals[nr_cols].nul = 0;

		dom = memchr(_c->aor->s, '@', _c->aor->len);
		if(dom == 0) {
			LM_INFO("*** use domain and AOR does not contain @\n");
			vals[nr_cols].val.str_val.len = 0;
			vals[nr_cols].val.str_val.s = 0;
		} else {
			vals[0].val.str_val.len = dom - _c->aor->s;
			vals[nr_cols].val.str_val.s = dom + 1;
			vals[nr_cols].val.str_val.len = _c->aor->s + _c->aor->len - dom - 1;
		}
		domain = vals[nr_cols].val.str_val;
		LM_INFO("** Username=%.*s  Domain=%.*s\n", vals[0].val.str_val.len,
				vals[0].val.str_val.s, vals[nr_cols].val.str_val.len,
				vals[nr_cols].val.str_val.s);
		nr_cols++;
	}
	user = vals[0].val.str_val;

	keys[nr_cols] = &expires_col;
	vals[nr_cols].type = DB1_DATETIME;
	vals[nr_cols].nul = 0;
	vals[nr_cols].val.time_val = ul_db_datetime_set(_c->expires);
	nr_cols++;

	keys[nr_cols] = &q_col;
	vals[nr_cols].type = DB1_DOUBLE;
	vals[nr_cols].nul = 0;
	vals[nr_cols].val.double_val = q2double(_c->q);
	nr_cols++;

	keys[nr_cols] = &callid_col;
	vals[nr_cols].type = DB1_STR;
	vals[nr_cols].nul = 0;
	vals[nr_cols].val.str_val = _c->callid;
	nr_cols++;

	keys[nr_cols] = &cseq_col;
	vals[nr_cols].type = DB1_INT;
	vals[nr_cols].nul = 0;
	vals[nr_cols].val.int_val = _c->cseq;
	nr_cols++;

	keys[nr_cols] = &flags_col;
	vals[nr_cols].type = DB1_INT;
	vals[nr_cols].nul = 0;
	vals[nr_cols].val.bitmap_val = _c->flags;
	nr_cols++;

	keys[nr_cols] = &cflags_col;
	vals[nr_cols].type = DB1_INT;
	vals[nr_cols].nul = 0;
	vals[nr_cols].val.bitmap_val = _c->cflags;
	nr_cols++;

	keys[nr_cols] = &user_agent_col;
	vals[nr_cols].type = DB1_STR;
	vals[nr_cols].nul = 0;
	vals[nr_cols].val.str_val = _c->user_agent;
	nr_cols++;

	keys[nr_cols] = &received_col;
	vals[nr_cols].type = DB1_STR;
	if(_c->received.s == 0) {
		vals[nr_cols].nul = 1;
	} else {
		vals[nr_cols].nul = 0;
		vals[nr_cols].val.str_val = _c->received;
	}
	nr_cols++;

	keys[nr_cols] = &path_col;
	vals[nr_cols].type = DB1_STR;
	if(_c->path.s == 0) {
		vals[nr_cols].nul = 1;
	} else {
		vals[nr_cols].nul = 0;
		vals[nr_cols].val.str_val = _c->path;
	}
	nr_cols++;

	keys[nr_cols] = &sock_col;
	vals[nr_cols].type = DB1_STR;
	if(_c->sock) {
		vals[nr_cols].val.str_val = _c->sock->sock_str;
		vals[nr_cols].nul = 0;
	} else {
		vals[nr_cols].nul = 1;
	}
	nr_cols++;

	keys[nr_cols] = &methods_col;
	vals[nr_cols].type = DB1_BITMAP;
	if(_c->methods == 0xFFFFFFFF) {
		vals[nr_cols].nul = 1;
	} else {
		vals[nr_cols].val.bitmap_val = _c->methods;
		vals[nr_cols].nul = 0;
	}
	nr_cols++;

	keys[nr_cols] = &last_mod_col;
	vals[nr_cols].type = DB1_DATETIME;
	vals[nr_cols].nul = 0;
	vals[nr_cols].val.time_val = ul_db_datetime_set(_c->last_modified);
	nr_cols++;

	keys[nr_cols] = &ruid_col;
	if(_c->ruid.len > 0) {
		vals[nr_cols].type = DB1_STR;
		vals[nr_cols].nul = 0;
		vals[nr_cols].val.str_val = _c->ruid;
	} else {
		vals[nr_cols].nul = 1;
	}
	nr_cols++;

	keys[nr_cols] = &instance_col;
	if(_c->instance.len > 0) {
		vals[nr_cols].type = DB1_STR;
		vals[nr_cols].nul = 0;
		vals[nr_cols].val.str_val = _c->instance;
	} else {
		vals[nr_cols].nul = 1;
	}
	nr_cols++;

	keys[nr_cols] = &reg_id_col;
	vals[nr_cols].type = DB1_INT;
	vals[nr_cols].nul = 0;
	vals[nr_cols].val.int_val = (int)_c->reg_id;
	nr_cols++;

	nr_cols_key = nr_cols;
	/* to prevent errors from the DB because of duplicated entries */

	if(ul_db_layer_replace(_d, &user, &domain, keys, vals, nr_cols, nr_cols_key)
			< 0) {
		LM_ERR("inserting contact in db failed\n");
		return -1;
	}

	return 0;
}


/*!
 * \brief Update contact in the database by address
 * \param _c updated contact
 * \return 0 on success, -1 on failure
 */

int db_update_ucontact_addr_new(ucontact_t *_c)
{
	char *dom;
	db_key_t keys1[4];
	db_val_t vals1[4];
	int n1 = 0;

	db_key_t keys2[18];
	db_val_t vals2[18];
	int nr_cols2 = 0;


	if(_c->flags & FL_MEM) {
		return 0;
	}

	struct udomain *_d;
	if(register_udomain(_c->domain->s, &_d) < 0) {
		return -1;
	}

	keys1[n1] = &user_col;
	vals1[n1].type = DB1_STR;
	vals1[n1].nul = 0;
	vals1[n1].val.str_val = *_c->aor;
	LM_DBG("aor:%.*s\n", vals1[n1].val.str_val.len, vals1[n1].val.str_val.s);
	n1++;

	keys1[n1] = &contact_col;
	vals1[n1].type = DB1_STR;
	vals1[n1].nul = 0;
	vals1[n1].val.str_val = _c->c;
	LM_DBG("contact:%.*s\n", vals1[n1].val.str_val.len,
			vals1[n1].val.str_val.s);
	n1++;

	switch(cfg_get(p_usrloc, p_usrloc_cfg, matching_mode)) {
		case CONTACT_ONLY:
			/* update call-id */
			keys2[nr_cols2] = &callid_col;
			vals2[nr_cols2].type = DB1_STR;
			vals2[nr_cols2].nul = 0;
			vals2[nr_cols2].val.str_val = _c->callid;
			nr_cols2++;
			/* update path */
			keys2[nr_cols2] = &path_col;
			vals2[nr_cols2].type = DB1_STR;
			if(_c->path.s == 0) {
				vals2[nr_cols2].nul = 1;
			} else {
				vals2[nr_cols2].nul = 0;
				vals2[nr_cols2].val.str_val = _c->path;
			}
			nr_cols2++;
			break;
		case CONTACT_CALLID:
			keys1[n1] = &callid_col;
			vals1[n1].type = DB1_STR;
			vals1[n1].nul = 0;
			vals1[n1].val.str_val = _c->callid;
			LM_DBG("callid:%.*s\n", vals1[n1].val.str_val.len,
					vals1[n1].val.str_val.s);
			n1++;
			/* update path */
			keys2[nr_cols2] = &path_col;
			vals2[nr_cols2].type = DB1_STR;
			if(_c->path.s == 0) {
				vals2[nr_cols2].nul = 1;
			} else {
				vals2[nr_cols2].nul = 0;
				vals2[nr_cols2].val.str_val = _c->path;
			}
			nr_cols2++;
			break;
		case CONTACT_PATH:
			keys1[n1] = &path_col;
			vals1[n1].type = DB1_STR;
			if(_c->path.s == 0) {
				vals1[n1].nul = 1;
				LM_DBG("path: NULL\n");
			} else {
				vals1[n1].nul = 0;
				vals1[n1].val.str_val = _c->path;
				LM_DBG("path:%.*s\n", vals1[n1].val.str_val.len,
						vals1[n1].val.str_val.s);
			}
			n1++;
			/* update call-id */
			keys2[nr_cols2] = &callid_col;
			vals2[nr_cols2].type = DB1_STR;
			vals2[nr_cols2].nul = 0;
			vals2[nr_cols2].val.str_val = _c->callid;
			nr_cols2++;
			break;
		default:
			LM_CRIT("unknown matching_mode %d\n",
					cfg_get(p_usrloc, p_usrloc_cfg, matching_mode));
			return -1;
	}

	keys2[nr_cols2] = &expires_col;
	vals2[nr_cols2].type = DB1_DATETIME;
	vals2[nr_cols2].nul = 0;
	vals2[nr_cols2].val.time_val = _c->expires;
	nr_cols2++;

	keys2[nr_cols2] = &q_col;
	vals2[nr_cols2].type = DB1_DOUBLE;
	vals2[nr_cols2].nul = 0;
	vals2[nr_cols2].val.double_val = q2double(_c->q);
	nr_cols2++;

	keys2[nr_cols2] = &cseq_col;
	vals2[nr_cols2].type = DB1_INT;
	vals2[nr_cols2].nul = 0;
	vals2[nr_cols2].val.int_val = _c->cseq;
	nr_cols2++;

	keys2[nr_cols2] = &flags_col;
	vals2[nr_cols2].type = DB1_INT;
	vals2[nr_cols2].nul = 0;
	vals2[nr_cols2].val.bitmap_val = _c->flags;
	nr_cols2++;

	keys2[nr_cols2] = &cflags_col;
	vals2[nr_cols2].type = DB1_INT;
	vals2[nr_cols2].nul = 0;
	vals2[nr_cols2].val.bitmap_val = _c->cflags;
	nr_cols2++;

	keys2[nr_cols2] = &user_agent_col;
	vals2[nr_cols2].type = DB1_STR;
	vals2[nr_cols2].nul = 0;
	vals2[nr_cols2].val.str_val = _c->user_agent;
	nr_cols2++;

	keys2[nr_cols2] = &received_col;
	vals2[nr_cols2].type = DB1_STR;
	if(_c->received.s == 0) {
		vals2[nr_cols2].nul = 1;
	} else {
		vals2[nr_cols2].nul = 0;
		vals2[nr_cols2].val.str_val = _c->received;
	}
	nr_cols2++;

	keys2[nr_cols2] = &sock_col;
	vals2[nr_cols2].type = DB1_STR;
	if(_c->sock) {
		vals2[nr_cols2].val.str_val = _c->sock->sock_str;
		vals2[nr_cols2].nul = 0;
	} else {
		vals2[nr_cols2].nul = 1;
	}
	nr_cols2++;

	keys2[nr_cols2] = &methods_col;
	vals2[nr_cols2].type = DB1_BITMAP;
	if(_c->methods == 0xFFFFFFFF) {
		vals2[nr_cols2].nul = 1;
	} else {
		vals2[nr_cols2].val.bitmap_val = _c->methods;
		vals2[nr_cols2].nul = 0;
	}
	nr_cols2++;

	keys2[nr_cols2] = &last_mod_col;
	vals2[nr_cols2].type = DB1_DATETIME;
	vals2[nr_cols2].nul = 0;
	vals2[nr_cols2].val.time_val = _c->last_modified;
	nr_cols2++;

	keys2[nr_cols2] = &ruid_col;
	if(_c->ruid.len > 0) {
		vals2[nr_cols2].type = DB1_STR;
		vals2[nr_cols2].nul = 0;
		vals2[nr_cols2].val.str_val = _c->ruid;
	} else {
		vals2[nr_cols2].nul = 1;
	}
	nr_cols2++;

	keys2[nr_cols2] = &instance_col;
	if(_c->instance.len > 0) {
		vals2[nr_cols2].type = DB1_STR;
		vals2[nr_cols2].nul = 0;
		vals2[nr_cols2].val.str_val = _c->instance;
	} else {
		vals2[nr_cols2].nul = 1;
	}
	nr_cols2++;

	keys2[nr_cols2] = &reg_id_col;
	vals2[nr_cols2].type = DB1_INT;
	vals2[nr_cols2].nul = 0;
	vals2[nr_cols2].val.int_val = (int)_c->reg_id;
	nr_cols2++;

	keys2[nr_cols2] = &uniq_col;
	if(_c->uniq.len > 0) {
		vals2[nr_cols2].type = DB1_STR;
		vals2[nr_cols2].nul = 0;
		vals2[nr_cols2].val.str_val = _c->uniq;
	} else {
		vals2[nr_cols2].nul = 1;
	}
	nr_cols2++;
	keys2[nr_cols2] = &contact_col;
	vals2[nr_cols2].type = DB1_STR;
	vals2[nr_cols2].nul = 0;
	vals2[nr_cols2].val.str_val = _c->c;
	LM_DBG("contact:%.*s\n", vals2[nr_cols2].val.str_val.len,
			vals2[nr_cols2].val.str_val.s);
	nr_cols2++;

	keys2[nr_cols2] = &user_col;
	vals2[nr_cols2].type = DB1_STR;
	vals2[nr_cols2].nul = 0;
	vals2[nr_cols2].val.str_val = *_c->aor;
	LM_DBG("aor:%.*s\n", vals2[nr_cols2].val.str_val.len,
			vals2[nr_cols2].val.str_val.s);
	nr_cols2++;
	if(use_domain) {
		keys1[n1] = &domain_col;
		vals1[n1].type = DB1_STR;
		vals1[n1].nul = 0;
		dom = memchr(_c->aor->s, '@', _c->aor->len);
		if(dom == 0) {
			vals1[0].val.str_val.len = 0;
			vals1[n1].val.str_val = *_c->aor;
		} else {
			vals1[0].val.str_val.len = dom - _c->aor->s;
			vals1[n1].val.str_val.s = dom + 1;
			vals1[n1].val.str_val.len = _c->aor->s + _c->aor->len - dom - 1;
		}
		n1++;
	}
	/*
	if (ul_dbf.use_table(ul_dbh, _c->domain) < 0) {
		LM_ERR("sql use_table failed\n");
		return -1;
	}
*/

	if(ul_db_layer_update(_d, &vals1[0].val.str_val, &vals1[n1 - 1].val.str_val,
			   keys1, 0, vals1, keys2, vals2, n1, nr_cols2)
			< 0) {
		LM_ERR("updating database failed\n");
		return -1;
	}


	return 0;
}

int db_update_ucontact_addr(ucontact_t *_c)
{
	char *dom;
	db_key_t keys1[4];
	db_val_t vals1[4];
	int n1;

	db_key_t keys2[14];
	db_val_t vals2[14];
	int nr_cols2;

	if(_c->flags & FL_MEM) {
		return 0;
	}
	struct udomain *_d;
	if(register_udomain(_c->domain->s, &_d) < 0) {
		return -1;
	}

	keys2[0] = &expires_col;
	keys2[1] = &q_col;
	keys2[2] = &cseq_col;
	keys2[3] = &flags_col;
	keys2[4] = &cflags_col;
	keys2[5] = &user_agent_col;
	keys2[6] = &received_col;
	keys2[7] = &path_col;
	keys2[8] = &sock_col;
	keys2[9] = &methods_col;
	keys2[10] = &last_mod_col;
	keys2[11] = &ruid_col;
	keys2[12] = &instance_col;
	keys2[13] = &reg_id_col;

	n1 = 0;
	keys1[n1] = &user_col;
	vals1[n1].type = DB1_STR;
	vals1[n1].nul = 0;
	vals1[n1].val.str_val = *_c->aor;

	n1++;
	keys1[n1] = &contact_col;
	vals1[n1].type = DB1_STR;
	vals1[n1].nul = 0;
	vals1[n1].val.str_val = _c->c;

	n1++;
	keys1[n1] = &callid_col;
	vals1[n1].type = DB1_STR;
	vals1[n1].nul = 0;
	vals1[n1].val.str_val = _c->callid;

	n1++;

	vals2[0].type = DB1_DATETIME;
	vals2[0].nul = 0;
	vals2[0].val.time_val = ul_db_datetime_set(_c->expires);

	vals2[1].type = DB1_DOUBLE;
	vals2[1].nul = 0;
	vals2[1].val.double_val = q2double(_c->q);

	vals2[2].type = DB1_INT;
	vals2[2].nul = 0;
	vals2[2].val.int_val = _c->cseq;

	vals2[3].type = DB1_INT;
	vals2[3].nul = 0;
	vals2[3].val.bitmap_val = _c->flags;

	vals2[4].type = DB1_INT;
	vals2[4].nul = 0;
	vals2[4].val.bitmap_val = _c->cflags;

	vals2[5].type = DB1_STR;
	vals2[5].nul = 0;
	vals2[5].val.str_val = _c->user_agent;

	vals2[6].type = DB1_STR;
	if(_c->received.s == 0) {
		vals2[6].nul = 1;
	} else {
		vals2[6].nul = 0;
		vals2[6].val.str_val = _c->received;
	}

	vals2[7].type = DB1_STR;
	if(_c->path.s == 0) {
		vals2[7].nul = 1;
	} else {
		vals2[7].nul = 0;
		vals2[7].val.str_val = _c->path;
	}

	vals2[8].type = DB1_STR;
	if(_c->sock) {
		vals2[8].val.str_val = _c->sock->sock_str;
		vals2[8].nul = 0;
	} else {
		vals2[8].nul = 1;
	}

	vals2[9].type = DB1_BITMAP;
	if(_c->methods == 0xFFFFFFFF) {
		vals2[9].nul = 1;
	} else {
		vals2[9].val.bitmap_val = _c->methods;
		vals2[9].nul = 0;
	}

	vals2[10].type = DB1_DATETIME;
	vals2[10].nul = 0;
	vals2[10].val.time_val = ul_db_datetime_set(_c->last_modified);

	nr_cols2 = 11;
	if(_c->ruid.len > 0) {
		vals2[nr_cols2].type = DB1_STR;
		vals2[nr_cols2].nul = 0;
		vals2[nr_cols2].val.str_val = _c->ruid;
	} else {
		vals2[nr_cols2].nul = 1;
	}

	nr_cols2++;
	if(_c->instance.len > 0) {
		vals2[nr_cols2].type = DB1_STR;
		vals2[nr_cols2].nul = 0;
		vals2[nr_cols2].val.str_val = _c->instance;
	} else {
		vals2[nr_cols2].nul = 1;
	}

	nr_cols2++;
	vals2[nr_cols2].type = DB1_INT;
	vals2[nr_cols2].nul = 0;
	vals2[nr_cols2].val.int_val = (int)_c->reg_id;

	nr_cols2++;

	if(use_domain) {
		keys1[n1] = &domain_col;
		vals1[n1].type = DB1_STR;
		vals1[n1].nul = 0;
		dom = memchr(_c->aor->s, '@', _c->aor->len);
		if(dom == 0) {
			vals1[0].val.str_val.len = 0;
			vals1[n1].val.str_val = *_c->aor;
		} else {
			vals1[0].val.str_val.len = dom - _c->aor->s;
			vals1[n1].val.str_val.s = dom + 1;
			vals1[n1].val.str_val.len = _c->aor->s + _c->aor->len - dom - 1;
		}
		n1++;
	}

	if(ul_db_layer_update(_d, &vals1[0].val.str_val, &vals1[n1 - 1].val.str_val,
			   keys1, 0, vals1, keys2, vals2, n1, nr_cols2)
			< 0) {
		LM_ERR("updating database failed\n");
		return -1;
	}

	return 0;
}

int db_update_ucontact_uniq(ucontact_t *_c)
{
	char *dom;

	db_key_t keys1[4];
	db_val_t vals1[4];
	db_op_t op1[4];
	int n1;

	db_key_t keys2[15];
	db_val_t vals2[15];
	int n2;

	str user, domain, uniq_c;

	if(_c->flags & FL_MEM) {
		return 0;
	}

	struct udomain *_d;
	if(register_udomain(_c->domain->s, &_d) < 0) {
		return -1;
	}

	if(_c->uniq.len > 0) {
		LM_INFO("updating database uniq: %.*s\n", _c->uniq.len, _c->uniq.s);
		n1 = 0;

		keys1[n1] = &user_col;
		op1[n1] = OP_EQ;
		vals1[n1].type = DB1_STR;
		vals1[n1].nul = 0;
		vals1[n1].val.str_val = *_c->aor;
		n1++;

		user = *_c->aor;

		if(use_domain) {
			keys1[n1] = &domain_col;
			op1[n1] = OP_EQ;
			vals1[n1].type = DB1_STR;
			vals1[n1].nul = 0;
			dom = memchr(_c->aor->s, '@', _c->aor->len);
			if(dom == 0) {
				vals1[n1].val.str_val.len = 0;
				vals1[n1].val.str_val.s = 0;
			} else {
				vals1[n1 - 1].val.str_val.len = dom - _c->aor->s;
				user = vals1[n1 - 1].val.str_val;
				vals1[n1].val.str_val.s = dom + 1;
				vals1[n1].val.str_val.len = _c->aor->s + _c->aor->len - dom - 1;
			}
			domain = vals1[n1].val.str_val;
			n1++;
		}

		keys1[n1] = &contact_col;
		op1[n1] = " like ";
		vals1[n1].type = DB1_STR;
		vals1[n1].nul = 0;
		vals1[n1].val.str_val.len = _c->uniq.len + 2;
		vals1[n1].val.str_val.s = pkg_malloc(vals1[n1].val.str_val.len);
		vals1[n1].val.str_val.s[0] = '%';
		strncpy(vals1[n1].val.str_val.s + 1, _c->uniq.s, _c->uniq.len);
		vals1[n1].val.str_val.s[vals1[n1].val.str_val.len - 1] = '%';
		uniq_c = vals1[n1].val.str_val;
		n1++;

		keys1[n1] = &ruid_col;
		op1[n1] = OP_EQ;
		vals1[n1].type = DB1_STR;
		vals1[n1].nul = 0;
		vals1[n1].val.str_val = _c->ruid;
		n1++;
	} else {
		LM_INFO("updating database uniq failed: NULL uniq; trying "
				"db_insert_ucontact()\n");
		return db_insert_ucontact(_c);
	}

	keys2[0] = &expires_col;
	keys2[1] = &q_col;
	keys2[2] = &cseq_col;
	keys2[3] = &flags_col;
	keys2[4] = &cflags_col;
	keys2[5] = &user_agent_col;
	keys2[6] = &received_col;
	keys2[7] = &path_col;
	keys2[8] = &sock_col;
	keys2[9] = &methods_col;
	keys2[10] = &last_mod_col;
	keys2[11] = &instance_col;
	keys2[12] = &reg_id_col;
	keys2[13] = &contact_col;
	keys2[14] = &callid_col;

	vals2[0].type = DB1_DATETIME;
	vals2[0].nul = 0;
	vals2[0].val.time_val = ul_db_datetime_set(_c->expires);

	vals2[1].type = DB1_DOUBLE;
	vals2[1].nul = 0;
	vals2[1].val.double_val = q2double(_c->q);

	vals2[2].type = DB1_INT;
	vals2[2].nul = 0;
	vals2[2].val.int_val = _c->cseq;

	vals2[3].type = DB1_INT;
	vals2[3].nul = 0;
	vals2[3].val.bitmap_val = _c->flags;

	vals2[4].type = DB1_INT;
	vals2[4].nul = 0;
	vals2[4].val.bitmap_val = _c->cflags;

	vals2[5].type = DB1_STR;
	vals2[5].nul = 0;
	vals2[5].val.str_val = _c->user_agent;

	vals2[6].type = DB1_STR;
	if(_c->received.s == 0) {
		vals2[6].nul = 1;
	} else {
		vals2[6].nul = 0;
		vals2[6].val.str_val = _c->received;
	}

	vals2[7].type = DB1_STR;
	if(_c->path.s == 0) {
		vals2[7].nul = 1;
	} else {
		vals2[7].nul = 0;
		vals2[7].val.str_val = _c->path;
	}

	vals2[8].type = DB1_STR;
	if(_c->sock) {
		vals2[8].val.str_val = _c->sock->sock_str;
		vals2[8].nul = 0;
	} else {
		vals2[8].nul = 1;
	}

	vals2[9].type = DB1_BITMAP;
	if(_c->methods == 0xFFFFFFFF) {
		vals2[9].nul = 1;
	} else {
		vals2[9].val.bitmap_val = _c->methods;
		vals2[9].nul = 0;
	}

	vals2[10].type = DB1_DATETIME;
	vals2[10].nul = 0;
	vals2[10].val.time_val = ul_db_datetime_set(_c->last_modified);

	n2 = 11;
	if(_c->instance.len > 0) {
		vals2[n2].type = DB1_STR;
		vals2[n2].nul = 0;
		vals2[n2].val.str_val = _c->instance;
	} else {
		vals2[n2].nul = 1;
	}
	n2++;

	vals2[n2].type = DB1_INT;
	vals2[n2].nul = 0;
	vals2[n2].val.int_val = (int)_c->reg_id;
	n2++;

	vals2[n2].type = DB1_STR;
	vals2[n2].nul = 0;
	vals2[n2].val.str_val = _c->c;
	n2++;

	vals2[n2].type = DB1_STR;
	vals2[n2].nul = 0;
	vals2[n2].val.str_val = _c->callid;
	n2++;

	if(ul_db_layer_update(
			   _d, &user, &domain, keys1, op1, vals1, keys2, vals2, n1, n2)
			< 0) {
		if(uniq_c.len > 0) {
			pkg_free(uniq_c.s);
			uniq_c.len = 0;
		}

		LM_ERR("updating database uniq failed: update error user:%.*s "
			   "domain:%.*s contact:%.*s ruid:%.*s\n",
				vals1[0].val.str_val.len, vals1[0].val.str_val.s,
				vals1[1].val.str_val.len, vals1[1].val.str_val.s,
				vals1[2].val.str_val.len, vals1[2].val.str_val.s,
				vals1[3].val.str_val.len, vals1[3].val.str_val.s);
		return -1;
	}

	if(uniq_c.len > 0) {
		pkg_free(uniq_c.s);
		uniq_c.len = 0;
	}

	return 0;
}
/*!
 * \brief Update contact in the database by ruid
 * \param _c updated contact
 * \return 0 on success, -1 on failure
 */
int db_update_ucontact_ruid(ucontact_t *_c)
{
	db_key_t keys1[1];
	db_val_t vals1[1];
	int n1;

	db_key_t keys2[17];
	db_val_t vals2[17];
	int n2;

	char *dom;
	str user, domain;

	if(_c->flags & FL_MEM) {
		return 0;
	}

	if(_c->ruid.len <= 0) {
		LM_ERR("updating record in database failed - empty ruid\n");
		return -1;
	}

	struct udomain *_d;
	if(register_udomain(_c->domain->s, &_d) < 0) {
		return -1;
	}

	n1 = 0;
	keys1[n1] = &ruid_col;
	vals1[n1].type = DB1_STR;
	vals1[n1].nul = 0;
	vals1[n1].val.str_val = _c->ruid;
	n1++;

	n2 = 0;
	keys2[n2] = &contact_col;
	vals2[n2].type = DB1_STR;
	vals2[n2].nul = 0;
	vals2[n2].val.str_val = _c->c;
	n2++;

	keys2[n2] = &expires_col;
	vals2[n2].type = DB1_DATETIME;
	vals2[n2].nul = 0;
	vals2[n2].val.time_val = ul_db_datetime_set(_c->expires);
	n2++;

	keys2[n2] = &q_col;
	vals2[n2].type = DB1_DOUBLE;
	vals2[n2].nul = 0;
	vals2[n2].val.double_val = q2double(_c->q);
	n2++;

	keys2[n2] = &cseq_col;
	vals2[n2].type = DB1_INT;
	vals2[n2].nul = 0;
	vals2[n2].val.int_val = _c->cseq;
	n2++;

	keys2[n2] = &flags_col;
	vals2[n2].type = DB1_INT;
	vals2[n2].nul = 0;
	vals2[n2].val.bitmap_val = _c->flags;
	n2++;

	keys2[n2] = &cflags_col;
	vals2[n2].type = DB1_INT;
	vals2[n2].nul = 0;
	vals2[n2].val.bitmap_val = _c->cflags;
	n2++;

	keys2[n2] = &user_agent_col;
	vals2[n2].type = DB1_STR;
	vals2[n2].nul = 0;
	vals2[n2].val.str_val = _c->user_agent;
	n2++;

	keys2[n2] = &received_col;
	vals2[n2].type = DB1_STR;
	if(_c->received.s == 0) {
		vals2[n2].nul = 1;
	} else {
		vals2[n2].nul = 0;
		vals2[n2].val.str_val = _c->received;
	}
	n2++;

	keys2[n2] = &path_col;
	vals2[n2].type = DB1_STR;
	if(_c->path.s == 0) {
		vals2[n2].nul = 1;
	} else {
		vals2[n2].nul = 0;
		vals2[n2].val.str_val = _c->path;
	}
	n2++;

	keys2[n2] = &sock_col;
	vals2[n2].type = DB1_STR;
	if(_c->sock) {
		vals2[n2].val.str_val = _c->sock->sock_str;
		vals2[n2].nul = 0;
	} else {
		vals2[n2].nul = 1;
	}
	n2++;

	keys2[n2] = &methods_col;
	vals2[n2].type = DB1_BITMAP;
	if(_c->methods == 0xFFFFFFFF) {
		vals2[n2].nul = 1;
	} else {
		vals2[n2].val.bitmap_val = _c->methods;
		vals2[n2].nul = 0;
	}
	n2++;

	keys2[n2] = &last_mod_col;
	vals2[n2].type = DB1_DATETIME;
	vals2[n2].nul = 0;
	vals2[n2].val.time_val = ul_db_datetime_set(_c->last_modified);
	n2++;

	keys2[n2] = &callid_col;
	vals2[n2].type = DB1_STR;
	vals2[n2].nul = 0;
	vals2[n2].val.str_val = _c->callid;
	n2++;

	keys2[n2] = &instance_col;
	if(_c->instance.len > 0) {
		vals2[n2].type = DB1_STR;
		vals2[n2].nul = 0;
		vals2[n2].val.str_val = _c->instance;
	} else {
		vals2[n2].nul = 1;
	}
	n2++;

	keys2[n2] = &reg_id_col;
	vals2[n2].type = DB1_INT;
	vals2[n2].nul = 0;
	vals2[n2].val.int_val = (int)_c->reg_id;
	n2++;

	user = *_c->aor;

	if(use_domain) {
		dom = memchr(_c->aor->s, '@', _c->aor->len);
		if(dom == 0) {
			user.len = 0;
			domain = *_c->aor;
		} else {
			user.len = dom - _c->aor->s;
			domain.s = dom + 1;
			domain.len = _c->aor->s + _c->aor->len - dom - 1;
		}
	}


	if(ul_db_layer_update(
			   _d, &user, &domain, keys1, 0, vals1, keys2, vals2, n1, n2)
			< 0) {
		LM_ERR("updating database failed\n");
		return -1;
	}


	return 0;
}

/*!
 * \brief Update contact in the database
 * \param _c updated contact
 * \return 0 on success, -1 on failure
 */
int db_update_ucontact(ucontact_t *_c)
{
	unsigned int db_ops_ruid_cfg = cfg_get(p_usrloc, p_usrloc_cfg, db_ops_ruid);

	if(db_ops_ruid_cfg == 0)
		return db_update_ucontact_addr(_c);
	else if(db_ops_ruid_cfg == 1)
		return db_update_ucontact_ruid(_c);
	else if(db_ops_ruid_cfg == 2)
		return db_update_ucontact_addr_new(_c);
	else if(db_ops_ruid_cfg == 3)
		return db_update_ucontact_uniq(_c);

	return -1;
}


/*!
 * \brief Delete contact from the database by address
 * \param _c deleted contact
 * \return 0 on success, -1 on failure
 */
int db_delete_ucontact_addr(ucontact_t *_c)
{
	char *dom;
	db_key_t keys[4];
	db_val_t vals[4];
	int n;

	if(_c->flags & FL_MEM) {
		return 0;
	}
	struct udomain *_d;
	if(register_udomain(_c->domain->s, &_d) < 0) {
		return -1;
	}

	n = 0;
	keys[n] = &user_col;
	vals[n].type = DB1_STR;
	vals[n].nul = 0;
	vals[n].val.str_val = *_c->aor;
	n++;

	keys[n] = &contact_col;
	vals[n].type = DB1_STR;
	vals[n].nul = 0;
	vals[n].val.str_val = _c->c;
	n++;

	keys[n] = &callid_col;
	vals[n].type = DB1_STR;
	vals[n].nul = 0;
	vals[n].val.str_val = _c->callid;
	n++;

	if(use_domain) {
		keys[n] = &domain_col;
		vals[n].type = DB1_STR;
		vals[n].nul = 0;
		dom = memchr(_c->aor->s, '@', _c->aor->len);
		if(dom == 0) {
			vals[0].val.str_val.len = 0;
			vals[n].val.str_val = *_c->aor;
		} else {
			vals[0].val.str_val.len = dom - _c->aor->s;
			vals[n].val.str_val.s = dom + 1;
			vals[n].val.str_val.len = _c->aor->s + _c->aor->len - dom - 1;
		}
		n++;
	}

	if(ul_db_layer_delete(_d, &vals[0].val.str_val, &vals[3].val.str_val, keys,
			   0, vals, (use_domain) ? (4) : (3))
			< 0) {
		LM_ERR("deleting from database failed\n");
		return -1;
	}

	return 0;
}

/*!
 * \brief Delete contact from the database by address
 * \param _c deleted contact
 * \return 0 on success, -1 on failure
 */
int db_delete_ucontact_uniq(ucontact_t *_c)
{
	char *dom;
	db_key_t keys[4];
	db_val_t vals[4];
	db_op_t op[4];
	int n;
	struct udomain *_d;

	str user, domain, uniq_c;

	if(_c->flags & FL_MEM) {
		return 0;
	}
	if(register_udomain(_c->domain->s, &_d) < 0) {
		return -1;
	}

	if(_c->uniq.len > 0) {
		LM_INFO("deleting database uniq: %.*s\n", _c->uniq.len, _c->uniq.s);
		n = 0;

		keys[n] = &user_col;
		op[n] = OP_EQ;
		vals[n].type = DB1_STR;
		vals[n].nul = 0;
		vals[n].val.str_val = *_c->aor;
		n++;

		user = *_c->aor;

		if(use_domain) {
			keys[n] = &domain_col;
			op[n] = OP_EQ;
			vals[n].type = DB1_STR;
			vals[n].nul = 0;
			dom = memchr(_c->aor->s, '@', _c->aor->len);
			if(dom == 0) {
				vals[n].val.str_val.len = 0;
				vals[n].val.str_val.s = 0;
			} else {
				// user part
				vals[n - 1].val.str_val.len = dom - _c->aor->s;
				user = vals[n - 1].val.str_val;

				// domain part
				vals[n].val.str_val.s = dom + 1;
				vals[n].val.str_val.len = _c->aor->s + _c->aor->len - dom - 1;
			}
			domain = vals[n].val.str_val;
			n++;
		}

		keys[n] = &contact_col;
		op[n] = " like ";
		vals[n].type = DB1_STR;
		vals[n].nul = 0;
		vals[n].val.str_val.len = _c->uniq.len + 2;
		vals[n].val.str_val.s = pkg_malloc(vals[n].val.str_val.len);
		vals[n].val.str_val.s[0] = '%';
		strncpy(vals[n].val.str_val.s + 1, _c->uniq.s, _c->uniq.len);
		vals[n].val.str_val.s[vals[n].val.str_val.len - 1] = '%';
		uniq_c = vals[n].val.str_val;
		n++;

		keys[n] = &ruid_col;
		op[n] = OP_EQ;
		vals[n].type = DB1_STR;
		vals[n].nul = 0;
		vals[n].val.str_val = _c->ruid;
		n++;
	} else {
		LM_INFO("deleting database uniq failed: NULL uniq; trying "
				"db_delete_ucontact_addr()\n");
		return db_delete_ucontact_addr(_c);
	}

	if(ul_db_layer_delete(_d, &user, &domain, keys, op, vals, n) < 0) {
		if(uniq_c.len > 0) {
			pkg_free(uniq_c.s);
			uniq_c.len = 0;
		}
		LM_ERR("deleting from database failed\n");
		return -1;
	}

	if(uniq_c.len > 0) {
		pkg_free(uniq_c.s);
		uniq_c.len = 0;
	}
	return 0;
}

/*!
 * \brief Delete contact from the database by ruid
 * \param _c deleted contact
 * \return 0 on success, -1 on failure
 */
int db_delete_ucontact_ruid(ucontact_t *_c)
{
	db_key_t keys[1];
	db_val_t vals[1];
	int n;
	char *dom;
	str user, domain;

	if(_c->flags & FL_MEM) {
		return 0;
	}

	if(_c->ruid.len <= 0) {
		LM_ERR("deleting from database failed - empty ruid\n");
		return -1;
	}

	struct udomain *_d;
	if(register_udomain(_c->domain->s, &_d) < 0) {
		return -1;
	}

	n = 0;
	keys[n] = &ruid_col;
	vals[n].type = DB1_STR;
	vals[n].nul = 0;
	vals[n].val.str_val = _c->ruid;
	n++;

	user = *_c->aor;

	if(use_domain) {
		dom = memchr(_c->aor->s, '@', _c->aor->len);
		if(dom == 0) {
			user.len = 0;
			domain = *_c->aor;
		} else {
			user.len = dom - _c->aor->s;
			domain.s = dom + 1;
			domain.len = _c->aor->s + _c->aor->len - dom - 1;
		}
	}

	if(ul_db_layer_delete(_d, &user, &domain, keys, 0, vals, n) < 0) {
		LM_ERR("deleting from database failed\n");
		return -1;
	}

	return 0;
}

/*!
 * \brief Delete contact from the database
 * \param _c deleted contact
 * \return 0 on success, -1 on failure
 */
int db_delete_ucontact(ucontact_t *_c)
{
	unsigned int db_ops_ruid_cfg = cfg_get(p_usrloc, p_usrloc_cfg, db_ops_ruid);

	if(db_ops_ruid_cfg == 0)
		return db_delete_ucontact_addr(_c);
	else if(db_ops_ruid_cfg == 1)
		return db_delete_ucontact_ruid(_c);
	else if(db_ops_ruid_cfg == 2)
		return db_delete_ucontact_addr(_c);
	else if(db_ops_ruid_cfg == 3)
		return db_delete_ucontact_uniq(_c);

	return -1;
}

/*!
 * \brief Remove a contact from list belonging to a certain record
 * \param _r record the contact belongs
 * \param _c removed contact
 */
static inline void unlink_contact(struct urecord *_r, ucontact_t *_c)
{
	if(_c->prev) {
		_c->prev->next = _c->next;
		if(_c->next) {
			_c->next->prev = _c->prev;
		}
	} else {
		_r->contacts = _c->next;
		if(_c->next) {
			_c->next->prev = 0;
		}
	}
}


/*!
 * \brief Insert a new contact into the list at the correct position
 * \param _r record that holds the sorted contacts
 * \param _c new contact
 */
static inline void update_contact_pos(struct urecord *_r, ucontact_t *_c)
{
	ucontact_t *pos, *ppos;

	if(desc_time_order) {
		/* order by time - first the newest */
		if(_c->prev == 0)
			return;
		unlink_contact(_r, _c);
		/* insert it at the beginning */
		_c->next = _r->contacts;
		_c->prev = 0;
		_r->contacts->prev = _c;
		_r->contacts = _c;
	} else {
		/* order by q - first the smaller q */
		if((_c->prev == 0 || _c->q <= _c->prev->q)
				&& (_c->next == 0 || _c->q >= _c->next->q))
			return;
		/* need to move , but where? */
		unlink_contact(_r, _c);
		_c->next = _c->prev = 0;
		for(pos = _r->contacts, ppos = 0; pos && pos->q < _c->q;
				ppos = pos, pos = pos->next)
			;
		if(pos) {
			if(!pos->prev) {
				pos->prev = _c;
				_c->next = pos;
				_r->contacts = _c;
			} else {
				_c->next = pos;
				_c->prev = pos->prev;
				pos->prev->next = _c;
				pos->prev = _c;
			}
		} else if(ppos) {
			ppos->next = _c;
			_c->prev = ppos;
		} else {
			_r->contacts = _c;
		}
	}
}


/*!
 * \brief Update ucontact with new values
 * \param _r record the contact belongs to
 * \param _c updated contact
 * \param _ci new contact informations
 * \return 0 on success, -1 on failure
 */
int update_ucontact(struct urecord *_r, ucontact_t *_c, ucontact_info_t *_ci)
{
	int res;

	/* we have to update memory in any case, but database directly
	 * only in db_mode 1 */
	if(mem_update_ucontact(_c, _ci) < 0) {
		LM_ERR("failed to update memory\n");
		return -1;
	}

	/* run callbacks for UPDATE event */
	if(exists_ulcb_type(UL_CONTACT_UPDATE)) {
		LM_DBG("exists callback for type= UL_CONTACT_UPDATE\n");
		run_ul_callbacks(UL_CONTACT_UPDATE, _c);
	}

	if(_r && db_mode != DB_ONLY)
		update_contact_pos(_r, _c);

	st_update_ucontact(_c);

	if(db_mode == WRITE_THROUGH || db_mode == DB_ONLY) {
		/*
		 * prevent problems when we're in a failover situation: the first DB contains
		 * the complete location entries, the other misses some of them. Before the
		 * update it checks for an entry in the first DB, this is ok. But the update
		 * in the second DB will not work. Thus the expire mechanism don't work, it
		 * takes too long until both DBs have the same number of entries again.
		 */
		if(cfg_get(p_usrloc, p_usrloc_cfg, db_update_as_insert))
			res = db_insert_ucontact(_c);
		else
			res = db_update_ucontact(_c);
		if(res < 0) {
			LM_ERR("failed to update database\n");
			return -1;
		} else {
			_c->state = CS_SYNC;
		}
	}
	return 0;
}
