nua_params.c 42.3 KB
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/*
 * This file is part of the Sofia-SIP package
 *
 * Copyright (C) 2006 Nokia Corporation.
 *
 * Contact: Pekka Pessi <pekka.pessi@nokia.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

/**@CFILE nua_register.c
 * @brief REGISTER and registrations
 *
 * @author Pekka Pessi <Pekka.Pessi@nokia.com>
 *
 * @date Created: Wed Mar  8 11:48:49 EET 2006 ppessi
 */

#include "config.h"

#include <sofia-sip/string0.h>
#include <sofia-sip/su_strlst.h>
#include <sofia-sip/token64.h>
#include <sofia-sip/su_tagarg.h>
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#include <sofia-sip/su_tag_inline.h>
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#include <sofia-sip/bnf.h>

#include <sofia-sip/sip_protos.h>
#include <sofia-sip/sip_util.h>
#include <sofia-sip/sip_status.h>
#include <sofia-sip/msg_parser.h>

#include "nua_stack.h"

#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>

#include <assert.h>

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#if !HAVE_STRCASESTR
char *strcasestr(char const *haystack, char const *needle);
#endif

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/* ====================================================================== */
/* Helper macros and functions for handling #nua_handle_preferences_t. */

#define NHP_IS_ANY_SET(nhp) nhp_is_any_set((nhp))

/** Check if any preference is set in @a nhp. */
su_inline int nhp_is_any_set(nua_handle_preferences_t const *nhp)
{
  char nhp_zero[sizeof nhp->nhp_set] = { 0 };
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  return memcmp(&nhp->nhp_set, nhp_zero, sizeof nhp->nhp_set) != 0;
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}

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/** Copy set parameters from @a b to @a a.
 *
 * If preference is set in @a b, mark it set also in @a a.
 */
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su_inline void nhp_or_set(nua_handle_preferences_t *a,
			  nua_handle_preferences_t const *b)
{
  unsigned *ap = (unsigned *)&a->nhp_set;
  unsigned const *bp = (unsigned const *)&b->nhp_set;
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  size_t i;
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  memcpy(a, b, offsetof(nua_handle_preferences_t, nhp_set));

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  for (i = 0; i < (sizeof a->nhp_set); i += (sizeof *ap))
    *ap++ |= *bp++;
}

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static int nhp_set_tags(su_home_t *home, 
			nua_handle_preferences_t *nhp,
			int global,
			tagi_t const *tags);
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static int nhp_merge_lists(su_home_t *home,
			   msg_hclass_t *hc,
			   msg_list_t **return_new_list,
			   msg_list_t const *old_list,
			   int already_set,
			   int already_parsed,
			   int always_merge,
			   tag_value_t value);
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static
nua_handle_preferences_t *nhp_move_params(su_home_t *home,
					  nua_handle_preferences_t *dst,
					  su_home_t *tmphome,
					  nua_handle_preferences_t const *src);
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/* ====================================================================== */
/* Magical NUTAG_USER_AGENT() - add NHP_USER_AGENT there if it is not there */

#define NHP_USER_AGENT PACKAGE_NAME "/" PACKAGE_VERSION

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static int already_contains_package_name(char const *s)
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{
  char const pn[] = " " PACKAGE_NAME "/";
  size_t pnlen = strlen(pn + 1);
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  return strncasecmp(s, pn + 1, pnlen) == 0 || strcasestr(s, pn);
}
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/* ====================================================================== */
/* Stack and handle parameters */

static int nua_stack_set_smime_params(nua_t *nua, tagi_t const *tags);

/** @internal Methods allowed by default. */
static char const nua_allow_str[] =
"INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, "
"MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE";

/** @internal Set default parameters */
int nua_stack_set_defaults(nua_handle_t *nh, 
			   nua_handle_preferences_t *nhp)
{
  su_home_t *home = (su_home_t *)nh;

  /* Set some defaults */
  NHP_SET(nhp, retry_count, 3);
  NHP_SET(nhp, max_subscriptions, 20);

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  NHP_SET(nhp, media_enable, 1);
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  NHP_SET(nhp, invite_enable, 1);
  NHP_SET(nhp, auto_alert, 0);
  NHP_SET(nhp, early_media, 0);
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  NHP_SET(nhp, only183_100rel, 0);
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  NHP_SET(nhp, auto_answer, 0);
  NHP_SET(nhp, auto_ack, 1);
  NHP_SET(nhp, invite_timeout, 120);

  NHP_SET(nhp, session_timer, 1800);
  NHP_SET(nhp, min_se, 120);
  NHP_SET(nhp, refresher, nua_no_refresher);
  NHP_SET(nhp, update_refresh, 0);

  NHP_SET(nhp, message_enable, 1);
  NHP_SET(nhp, win_messenger_enable, 0);
  if (getenv("PIMIW_HACK") != 0)
    NHP_SET(nhp, message_auto_respond, 1);

  NHP_SET(nhp, media_features,  0);
  NHP_SET(nhp, callee_caps, 0);
  NHP_SET(nhp, service_route_enable, 1);
  NHP_SET(nhp, path_enable, 1);

  NHP_SET(nhp, refer_expires, 300);
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  NHP_SET(nhp, refer_with_id, 1);
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  NHP_SET(nhp, substate, nua_substate_active);

  NHP_SET(nhp, allow, sip_allow_make(home, nua_allow_str));
  NHP_SET(nhp, supported, sip_supported_make(home, "timer, 100rel"));
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  NHP_SET(nhp, user_agent, su_strdup(home, NHP_USER_AGENT));
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  NHP_SET(nhp, outbound, su_strdup(home, "natify"));
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  NHP_SET(nhp, keepalive, 120000);
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  if (!nhp->nhp_allow ||
      !nhp->nhp_supported ||
      !nhp->nhp_user_agent ||
      !nhp->nhp_outbound)
    return -1;

  return 0;
}

/** @internal Set the default from field */
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int nua_stack_set_from(nua_t *nua, int initial, tagi_t const *tags)
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{
  sip_from_t const *from = NONE;
  char const *str = NONE;
  sip_from_t *f = NULL,  f0[1];

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  char const *uicc_name = "default";

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  tl_gets(tags,
	  /* By nua_stack_set_from() */
	  SIPTAG_FROM_REF(from),
	  SIPTAG_FROM_STR_REF(str),
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	  NUTAG_UICC_REF(uicc_name),
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	  TAG_END());

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#if HAVE_UICC_H
  if (initial && uicc_name)
    nua->nua_uicc = uicc_create(root, uicc_name);
#endif

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  if (!initial && from == NONE && str == NONE)
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    return 0;
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  sip_from_init(f0);

  if (from && from != NONE) {
    f0->a_display = from->a_display;
    *f0->a_url = *from->a_url;
    f = sip_from_dup(nua->nua_home, f0);
  }
  else if (str && str != NONE) {
    f = sip_from_make(nua->nua_home, str);
    if (f)
      *f0 = *f, f = f0, f->a_params = NULL;
  }
  else {
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    sip_contact_t const *m;

    m = nua_stack_get_contact(nua->nua_registrations);
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    if (m) {
      f0->a_display = m->m_display;
      *f0->a_url = *m->m_url;
      f = sip_from_dup(nua->nua_home, f0);
    }
  }

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  if (!f)
    return -1;

  *nua->nua_from = *f;
  return 0;
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}

/** @internal Initialize instance ID. */
int nua_stack_init_instance(nua_handle_t *nh, tagi_t const *tags)
{
  nua_handle_preferences_t *nhp = nh->nh_prefs;

  char const *instance = NONE;

  tl_gets(tags, NUTAG_INSTANCE_REF(instance), TAG_END());

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  if (instance != NONE) {
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    NHP_SET(nhp, instance, su_strdup(nh->nh_home, instance));
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    if (instance && !nhp->nhp_instance)
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      return -1;
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  }

  return 0;
}

/**@fn void nua_set_params(nua_t *nua, tag_type_t tag, tag_value_t value, ...)
 *
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 * Set @nua parameters, shared by all handles.
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 *
 * @param nua             Pointer to NUA stack object
 * @param tag, value, ... List of tagged parameters
 *
 * @return
 *     nothing
 *
 * @par Related tags:
 *   NUTAG_ALLOW() \n
 *   NUTAG_AUTOACK() \n
 *   NUTAG_AUTOALERT() \n
 *   NUTAG_AUTOANSWER() \n
 *   NUTAG_CALLEE_CAPS() \n
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 *   NUTAG_DETECT_NETWORK_UPDATES() \n
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 *   NUTAG_EARLY_MEDIA() \n
 *   NUTAG_ENABLEINVITE() \n
 *   NUTAG_ENABLEMESSAGE() \n
 *   NUTAG_ENABLEMESSENGER() \n
 *   NUTAG_INSTANCE() \n
 *   NUTAG_INVITE_TIMER() \n
 *   NUTAG_KEEPALIVE() \n
 *   NUTAG_KEEPALIVE_STREAM() \n
 *   NUTAG_MAX_SUBSCRIPTIONS() \n
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 *   NUTAG_MEDIA_ENABLE() \n
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 *   NUTAG_MEDIA_FEATURES() \n
 *   NUTAG_MIN_SE() \n
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 *   NUTAG_M_DISPLAY() \n
 *   NUTAG_M_FEATURES() \n
 *   NUTAG_M_PARAMS() \n
 *   NUTAG_M_USERNAME() \n
 *   NUTAG_ONLY183_100REL() \n
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 *   NUTAG_OUTBOUND() \n
 *   NUTAG_PATH_ENABLE() \n
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 *   NUTAG_REFER_EXPIRES() \n
 *   NUTAG_REFER_WITH_ID() \n
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 *   NUTAG_REGISTRAR() \n
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 *   NUTAG_RETRY_COUNT() \n
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 *   NUTAG_SERVICE_ROUTE_ENABLE() \n
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 *   NUTAG_SESSION_REFRESHER() \n
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 *   NUTAG_SESSION_TIMER() \n
 *   NUTAG_SMIME_ENABLE() \n
 *   NUTAG_SMIME_KEY_ENCRYPTION() \n
 *   NUTAG_SMIME_MESSAGE_DIGEST() \n
 *   NUTAG_SMIME_MESSAGE_ENCRYPTION() \n
 *   NUTAG_SMIME_OPT() \n
 *   NUTAG_SMIME_PROTECTION_MODE() \n
 *   NUTAG_SMIME_SIGNATURE() \n
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 *   NUTAG_SOA_NAME() \n
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 *   NUTAG_SUBSTATE() \n
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 *   NUTAG_SUPPORTED() \n
 *   NUTAG_UPDATE_REFRESH() \n
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 *   NUTAG_USER_AGENT() \n
 *   SIPTAG_ALLOW() \n
 *   SIPTAG_ALLOW_STR() \n
 *   SIPTAG_FROM() \n
 *   SIPTAG_FROM_STR() \n
 *   SIPTAG_ORGANIZATION() \n
 *   SIPTAG_ORGANIZATION_STR() \n
 *   SIPTAG_SUPPORTED() \n
 *   SIPTAG_SUPPORTED_STR() \n
 *   SIPTAG_USER_AGENT() \n
 *   SIPTAG_USER_AGENT_STR() \n
 *
 * nua_set_params() also accepts any soa tags, defined in
 * <sofia-sip/soa_tag.h>, and nta tags, defined in <sofia-sip/nta_tag.h>.
 * 
 * @par Events:
 *     nua_r_set_params
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 *
 * @par SIP Header as NUA Parameters
 * The @nua parameters include SIP headers @Allow, @Supported, @Organization,
 * @UserAgent and @From. They are included in most of the SIP messages sent
 * by @nua. They are set in the same way as the tagged arguments are
 * used to populate a SIP message.
 * @par
 * When multiple tags for the same header are specified, the behaviour
 * depends on the header type. If only a single header field can be included
 * in a SIP message, the latest non-NULL value is used, e.g., @Organization. 
 * However, if the SIP header can consist of multiple lines or header fields
 * separated by comma, in this case, @Allow and @Supported, all the tagged
 * values are concatenated.
 * @par
 * However, if the tag value is #SIP_NONE (-1 casted as a void pointer), the
 * values from previous tags are ignored.
 *
 * For example, the nua_set_params() call like this:
 * @code
 * nua_set_params(nua,
 *                SIPTAG_USER_AGENT_STR("tester/1.0"),
 *                SIPTAG_ALLOW_STR("INVITE,CANCEL,BYE,ACK"),
 *                SIPTAG_ORGANIZATION(NULL),
 *                SIPTAG_USER_AGENT(NULL),
 *                SIPTAG_ALLOW(SIP_NONE),
 *                TAG_END());
 * @endcode
 * will leave @Allow and @Organization headers empty. The @UserAgent header
 * will contain value "tester/1.0".
 * @code
 * nua_set_params(nua,
 *                SIPTAG_ORGANIZATION_STR("Malevolent Microwavers"),
 *                SIPTAG_ALLOW_STR("OPTIONS"),
 *                SIPTAG_ALLOW(SIP_NONE),
 *                SIPTAG_ORGANIZATION_STR("The Phone Company"),
 *                SIPTAG_ALLOW_STR("SUBSCRIBE"),
 *                SIPTAG_ALLOW(NULL),
 *                SIPTAG_ORGANIZATION_STR(NULL),
 *                TAG_END());
 * @endcode
 * sets the header @Allow with value <code>SUBSCRIBE</code> and the
 * header @Organization will have value <code>The Phone Company</code>.
 *
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 */

/**@fn void nua_set_hparams(nua_handle_t *nh, tag_type_t tag, tag_value_t value, ...);
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 *
 * Set the handle-specific parameters.
 *
 * The handle-specific parameters override default or global parameters set
 * by nua_set_params(). The handle-specific parameters are set by several
 * other operations: nua_invite(), nua_respond(), nua_ack(),
 * nua_prack(), nua_update(), nua_info(), nua_bye(), nua_options(),
 * nua_message(), nua_register(), nua_publish(), nua_refer(),
 * nua_subscribe(), nua_notify(), nua_refer(), and nua_notifier().
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 *
 * @param nh              Pointer to a NUA handle
 * @param tag, value, ... List of tagged parameters
 *
 * @return
 *     nothing
 *
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 * @par Tags Used to Set Handle-Specific Parameters:
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 *   NUTAG_ALLOW() \n
 *   NUTAG_AUTOACK() \n
 *   NUTAG_AUTOALERT() \n
 *   NUTAG_AUTOANSWER() \n
 *   NUTAG_CALLEE_CAPS() \n
 *   NUTAG_EARLY_MEDIA() \n
 *   NUTAG_ENABLEINVITE() \n
 *   NUTAG_ENABLEMESSAGE() \n
 *   NUTAG_ENABLEMESSENGER() \n
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 *   NUTAG_INSTANCE() \n
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 *   NUTAG_INVITE_TIMER() \n
 *   NUTAG_KEEPALIVE() \n
 *   NUTAG_KEEPALIVE_STREAM() \n
 *   NUTAG_MAX_SUBSCRIPTIONS() \n
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 *   NUTAG_MEDIA_ENABLE() \n
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 *   NUTAG_MEDIA_FEATURES() \n
 *   NUTAG_MIN_SE() \n
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 *   NUTAG_M_DISPLAY() \n
 *   NUTAG_M_FEATURES() \n
 *   NUTAG_M_PARAMS() \n
 *   NUTAG_M_USERNAME() \n
 *   NUTAG_ONLY183_100REL() \n
 *   NUTAG_OUTBOUND() \n
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 *   NUTAG_PATH_ENABLE() \n
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 *   NUTAG_REFER_EXPIRES() \n
 *   NUTAG_REFER_WITH_ID() \n
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 *   NUTAG_REGISTRAR() \n
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 *   NUTAG_RETRY_COUNT() \n
 *   NUTAG_SERVICE_ROUTE_ENABLE() \n
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 *   NUTAG_SESSION_REFRESHER() \n
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 *   NUTAG_SESSION_TIMER() \n
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 *   NUTAG_SOA_NAME() \n
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 *   NUTAG_SUBSTATE() \n
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 *   NUTAG_SUPPORTED() \n
 *   NUTAG_UPDATE_REFRESH() \n
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 *   NUTAG_USER_AGENT() \n
 *   SIPTAG_ALLOW() \n
 *   SIPTAG_ALLOW_STR() \n
 *   SIPTAG_ORGANIZATION() \n
 *   SIPTAG_ORGANIZATION_STR() \n
 *   SIPTAG_SUPPORTED() \n
 *   SIPTAG_SUPPORTED_STR() \n
 *   SIPTAG_USER_AGENT() \n
 *   SIPTAG_USER_AGENT_STR() \n
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 * Any soa tags are also considered as handle-specific parameters. They are
 * defined in <sofia-sip/soa_tag.h>.
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 *
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 * The global parameters that can not be set by nua_set_hparams() include 
 * NUTAG_DETECT_NETWORK_UPDATES(), NUTAG_SMIME_* tags, and all NTA tags.
 * 
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 * @par Events:
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 *     nua_r_set_params
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 */

int nua_stack_set_params(nua_t *nua, nua_handle_t *nh, nua_event_t e,
			 tagi_t const *tags)
{
  nua_handle_t *dnh = nua->nua_dhandle;
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  nua_handle_preferences_t tmp[1], *nhp = nh->nh_prefs;
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  nua_handle_preferences_t const *dnhp = dnh->nh_prefs;

  su_home_t tmphome[1] = { SU_HOME_INIT(tmphome) };

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  tagi_t const *ptags;
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  int error, global;
  int status = 900;
  char const *phrase = "Error storing parameters";
  sip_supported_t const *supported = NULL;
  sip_allow_t const *allow = NULL;
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  enter;
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  ptags = !nh->nh_used_ptags ? nh->nh_ptags : NULL;
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  *tmp = *nhp; NHP_UNSET_ALL(tmp);

  /* Supported features and allowed methods can be merged with previous ones */
  if (!NHP_ISSET(nhp, supported)) 
    supported = tmp->nhp_supported = dnhp->nhp_supported;
  if (!NHP_ISSET(nhp, allow)) 
    allow = tmp->nhp_allow = dnhp->nhp_allow;

  error = 0;
  global = nh == dnh;			/* save also stack-specific params */
    
  /* Set and save parameters to tmp */
  if (nhp_set_tags(tmphome, tmp, global, ptags) < 0)
    error = 1, phrase = "Error storing default handle parameters";
  else if (nhp_set_tags(tmphome, tmp, global, tags) < 0)
    error = 1, phrase = "Error storing parameters";
  else {
    if (NHP_IS_ANY_SET(tmp)) {
      if (tmp->nhp_supported == supported)
	tmp->nhp_supported = NULL;
      if (tmp->nhp_allow == allow)
	tmp->nhp_allow = NULL;

      /* Move parameters from tmp to nhp (or allocate new nhp) */
      if (nh != dnh && nhp == dnh->nh_prefs)
	nhp = NULL;
      nhp = nhp_move_params(nh->nh_home, nhp, tmphome, tmp);

      if (nhp)
	nh->nh_prefs = nhp;
      else
	/* Fail miserably with ENOMEM */
	error = 1, status = 900, phrase = su_strerror(ENOMEM);
    }

    if (!error)
      nh->nh_used_ptags = 1;
  }

  su_home_deinit(tmphome);

  if (error)
    ;
  else if (!nh->nh_soa && NHP_GET(nhp, dnhp, media_enable)) {
    /* Create soa when needed */
    char const *soa_name = NHP_GET(nhp, dnhp, soa_name);

    if (dnh->nh_soa)
      nh->nh_soa = soa_clone(dnh->nh_soa, nua->nua_root, nh);
    else  
      nh->nh_soa = soa_create(soa_name, nua->nua_root, nh);
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    ptags = nh->nh_ptags;

    if (!nh->nh_soa)
      error = 1, status = 900, phrase = "Error Creating SOA Object";
  }
  else if (nh->nh_soa && !NHP_GET(nhp, dnhp, media_enable)) {
    /* ... destroy soa when not needed */
    soa_destroy(nh->nh_soa), nh->nh_soa = NULL;
  }

  if (!error && nh->nh_soa) {
    if ((ptags && soa_set_params(nh->nh_soa, TAG_NEXT(ptags)) < 0) ||
	(tags && soa_set_params(nh->nh_soa, TAG_NEXT(tags)) < 0))
      error = 1, status = 900, phrase = "Error Setting SOA Parameters";
  }

  if (error || nh != dnh) {
    ;
  }
  else if (nua_stack_set_smime_params(nua, tags) < 0) {
    error = 1, status = 900, phrase = "Error setting S/MIME parameters";
  }
  else if (!nua->nua_nta) {
  }
  /* Set stack-specific things below */
  else if (nta_agent_set_params(nua->nua_nta, TAG_NEXT(tags)) < 0) {
    status = 900, phrase = "Error setting NTA parameters";
    error = 1;
  }
  else {
    nua_stack_set_from(nua, 0, tags);
    if (NHP_ISSET(nhp, detect_network_updates))
      nua_stack_launch_network_change_detector(nua);
  }

  if (error) {
    if (e == nua_i_none)
      SU_DEBUG_1(("nua_set_params(): failed: %s\n", phrase));
    return UA_EVENT2(e, status, phrase), -1;
  }

  if (e == nua_r_set_params)
    UA_EVENT2(e, 200, "OK");

  return 0;
}

/** Parse parameters from tags to @a nhp.
 *
 * @param home allocate new values from @a home
 * @param nhp  structure to store handle preferences
 * @param global  if true, save also global parameters
 * @param tags list of tags to parse
 */
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static int nhp_set_tags(su_home_t *home, 
			nua_handle_preferences_t *nhp,
			int global,
			tagi_t const *tags)
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{

/* Set copy of string to handle pref structure */
#define NHP_SET_STR(nhp, name, v)				 \
  if ((v) != (tag_value_t)0) {					 \
    char const *_value = (char const *)v;			 \
    char *_new = _value ? su_strdup(home, _value) : NULL;	 \
    if (NHP_ISSET(nhp, name))					 \
      su_free(home, (void *)nhp->nhp_##name);			 \
    NHP_SET(nhp, name, _new);					 \
    if (_new == NULL && _value != NULL)				 \
      return -1;						 \
  }

/* Set copy of string from url to handle pref structure */
#define NHP_SET_STR_BY_URL(nhp, name, v)			 \
  if ((v) != (tag_value_t)-1) {					 \
    url_t const *_value = (url_t const *)(v);			 \
    char *_new;							 \
    _new = url_as_string(home, (void *)_value);			 \
    if (NHP_ISSET(nhp, name))					 \
      su_free(home, (void *)nhp->nhp_##name);			 \
    NHP_SET(nhp, name, _new);					 \
    if (_new == NULL && _value != NULL)				 \
      return -1;						 \
  }

/* Set copy of header to handle pref structure */
#define NHP_SET_HEADER(nhp, name, v)				 \
  if ((v) != 0) {						 \
    sip_##name##_t const *_value = (sip_##name##_t const *)(v);	 \
    sip_##name##_t *_new = NULL;				 \
    if (_value != SIP_NONE)					 \
      _new = sip_##name##_dup(home, _value);			 \
    if (NHP_ISSET(nhp, name))					 \
      msg_header_free_all(home, (void *)nhp->nhp_##name);	 \
    NHP_SET(nhp, name, _new);					 \
    if (_new == NULL && _value != SIP_NONE)			 \
      return -1;						 \
  }

/* Set header made of string to handle pref structure */
#define NHP_SET_HEADER_STR(nhp, name, v)			 \
  if ((v) != 0) {						 \
    char const *_value = (char const *)(v);			 \
    sip_##name##_t *_new = NULL;				 \
    if (_value != SIP_NONE)					 \
      _new = sip_##name##_make(home, _value);			 \
    if (NHP_ISSET(nhp, name))					 \
      msg_header_free_all(home, (void *)nhp->nhp_##name);	 \
    NHP_SET(nhp, name, _new);					 \
    if (_new == NULL && _value != SIP_NONE)			 \
      return -1;						 \
  }

/* Set copy of string from header to handle pref structure */
#define NHP_SET_STR_BY_HEADER(nhp, name, v)			 \
  if ((v) != 0) {					 \
    sip_##name##_t const *_value = (sip_##name##_t const *)(v);	 \
    char *_new = NULL;						 \
    if (_value != SIP_NONE)					 \
      _new = sip_header_as_string(home, (void *)_value);	 \
    if (NHP_ISSET(nhp, name))					 \
      su_free(home, (void *)nhp->nhp_##name);			 \
    NHP_SET(nhp, name, _new);					 \
    if (_new == NULL && _value != SIP_NONE)			 \
      return -1;						 \
  }


  tagi_t const *t;
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  for (t = tags; t; t = tl_next(t)) {
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    tag_type_t tag = t->t_tag;
    tag_value_t value = t->t_value;

    if (tag == NULL)
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      break;
    /* NUTAG_RETRY_COUNT(retry_count) */
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    else if (tag == nutag_retry_count) {
      NHP_SET(nhp, retry_count, (unsigned)value);
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    }
    /* NUTAG_MAX_SUBSCRIPTIONS(max_subscriptions) */
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    else if (tag == nutag_max_subscriptions) {
      NHP_SET(nhp, max_subscriptions, (unsigned)value);
    }
    /* NUTAG_SOA_NAME(soa_name) */
    else if (tag == nutag_soa_name) {
      NHP_SET_STR(nhp, soa_name, value);
    }
    /* NUTAG_MEDIA_ENABLE(media_enable) */
    else if (tag == nutag_media_enable) {
      NHP_SET(nhp, media_enable, value != 0);
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    }
    /* NUTAG_ENABLEINVITE(invite_enable) */
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    else if (tag == nutag_enableinvite) {
      NHP_SET(nhp, invite_enable, value != 0);
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    }
    /* NUTAG_AUTOALERT(auto_alert) */
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    else if (tag == nutag_autoalert) {
      NHP_SET(nhp, auto_alert, value != 0);
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    }
    /* NUTAG_EARLY_MEDIA(early_media) */
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    else if (tag == nutag_early_media) {
      NHP_SET(nhp, early_media, value != 0);
686
    }
687
    /* NUTAG_ONLY183_100REL(only183_100rel) */
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    else if (tag == nutag_only183_100rel) {
      NHP_SET(nhp, only183_100rel, value != 0);
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    }
691
    /* NUTAG_AUTOANSWER(auto_answer) */
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    else if (tag == nutag_autoanswer) {
      NHP_SET(nhp, auto_answer, value != 0);
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    }
    /* NUTAG_AUTOACK(auto_ack) */
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    else if (tag == nutag_autoack) {
      NHP_SET(nhp, auto_ack, value != 0);
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    }
    /* NUTAG_INVITE_TIMER(invite_timeout) */
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    else if (tag == nutag_invite_timer) {
      NHP_SET(nhp, invite_timeout, (unsigned)value);
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    }
    /* NUTAG_SESSION_TIMER(session_timer) */
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    else if (tag == nutag_session_timer) {
      NHP_SET(nhp, session_timer, (unsigned)value);
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    }
    /* NUTAG_MIN_SE(min_se) */
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    else if (tag == nutag_min_se) {
      NHP_SET(nhp, min_se, (unsigned)value);
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    }
    /* NUTAG_SESSION_REFRESHER(refresher) */
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    else if (tag == nutag_session_refresher) {
      int refresher = value;

      if (refresher >= nua_remote_refresher)
	refresher = nua_remote_refresher;
      else if (refresher <= nua_no_refresher)
	refresher = nua_no_refresher;

      NHP_SET(nhp, refresher, refresher);
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    }
    /* NUTAG_UPDATE_REFRESH(update_refresh) */
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    else if (tag == nutag_update_refresh) {
      NHP_SET(nhp, update_refresh, value != 0);
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    }
    /* NUTAG_ENABLEMESSAGE(message_enable) */
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    else if (tag == nutag_enablemessage) {
      NHP_SET(nhp, message_enable, value != 0);
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    }
    /* NUTAG_ENABLEMESSENGER(win_messenger_enable) */
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    else if (tag == nutag_enablemessenger) {
      NHP_SET(nhp, win_messenger_enable, value != 0);
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    }
#if 0
    /* NUTAG_MESSAGE_AUTOANSWER(message_auto_respond) */
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    else if (tag == nutag_message_autoanwer) {
      NHP_SET(nhp, message_auto_respond, value);
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    }
#endif
    /* NUTAG_CALLEE_CAPS(callee_caps) */
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    else if (tag == nutag_callee_caps) {
      NHP_SET(nhp, callee_caps, value != 0);
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    }
    /* NUTAG_MEDIA_FEATURES(media_features) */
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    else if (tag == nutag_media_features) {
      NHP_SET(nhp, media_features, value != 0);
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    }
    /* NUTAG_SERVICE_ROUTE_ENABLE(service_route_enable) */
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    else if (tag == nutag_service_route_enable) {
      NHP_SET(nhp, service_route_enable, value != 0);
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    }
    /* NUTAG_PATH_ENABLE(path_enable) */
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    else if (tag == nutag_path_enable) {
      NHP_SET(nhp, path_enable, value != 0);
755
    }
756
    /* NUTAG_REFER_EXPIRES(refer_expires) */
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    else if (tag == nutag_refer_expires) {
      NHP_SET(nhp, refer_expires, value);
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    }
    /* NUTAG_REFER_WITH_ID(refer_with_id) */
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    else if (tag == nutag_refer_with_id) {
      NHP_SET(nhp, refer_with_id, value != 0);
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    }
764
    /* NUTAG_SUBSTATE(substate) */
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    else if (tag == nutag_substate) {
      NHP_SET(nhp, substate, (int)value);
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    }
    /* NUTAG_KEEPALIVE(keepalive) */
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    else if (tag == nutag_keepalive) {
      NHP_SET(nhp, keepalive, (unsigned)value);
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    }
    /* NUTAG_KEEPALIVE_STREAM(keepalive_stream) */
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    else if (tag == nutag_keepalive_stream) {
      NHP_SET(nhp, keepalive_stream, (unsigned)value);
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    }

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    /* NUTAG_SUPPORTED(feature) */
    /* SIPTAG_SUPPORTED_STR(supported_str) */
    /* SIPTAG_SUPPORTED(supported) */
    else if (tag == nutag_supported ||
	     tag == siptag_supported || 
	     tag == siptag_supported_str) {
      int ok;
      sip_supported_t *supported = NULL;

      ok = nhp_merge_lists(home, 
			   sip_supported_class, &supported, nhp->nhp_supported,
			   NHP_ISSET(nhp, supported), /* already set by tags */
			   tag == siptag_supported, /* dup it, don't make */
			   tag == nutag_supported, /* merge with old value */
			   t->t_value);
      if (ok < 0)
	return -1;
      else if (ok)
	NHP_SET(nhp, supported, supported);
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    }
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    /* NUTAG_ALLOW(allowing) */
    /* SIPTAG_ALLOW_STR(allow_str) */
    /* SIPTAG_ALLOW(allow) */
    else if (tag == nutag_allow ||
	     tag == siptag_allow_str ||
	     tag == siptag_allow) {
      int ok;
      sip_allow_t *allow = NULL;

      ok = nhp_merge_lists(home, 
			   sip_allow_class, &allow, nhp->nhp_allow,
			   NHP_ISSET(nhp, allow), /* already set by tags */
			   tag == siptag_allow, /* dup it, don't make */
			   tag == nutag_allow, /* merge with old value */
			   t->t_value);
      if (ok < 0)
	return -1;
      else if (ok)
	NHP_SET(nhp, allow, allow);
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    }
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    /* SIPTAG_USER_AGENT(user_agent) */
    else if (tag == siptag_user_agent) {
      NHP_SET_STR_BY_HEADER(nhp, user_agent, value);
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    }
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    /* SIPTAG_USER_AGENT_STR(user_agent_str) */
    else if (tag == siptag_user_agent_str && value != 0) {
      if (value == -1)
	value = 0;
      NHP_SET_STR(nhp, user_agent, value);
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    }
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    /* NUTAG_USER_AGENT(ua_name) */
    else if (tag == nutag_user_agent) {
      /* Add contents of NUTAG_USER_AGENT() to our distribution name */
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      char const *str = (void *)value, *ua;
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      if (str && !already_contains_package_name(str))
	ua = su_sprintf(home, "%s %s", str, NHP_USER_AGENT);
      else if (str)
	ua = su_strdup(home, str);
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      else
	ua = su_strdup(home, NHP_USER_AGENT);

      NHP_SET(nhp, user_agent, ua);
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    }
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    /* SIPTAG_ORGANIZATION(organization) */
    else if (tag == siptag_organization) {
      NHP_SET_STR_BY_HEADER(nhp, organization, value);
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    }
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    /* SIPTAG_ORGANIZATION_STR(organization_str) */
    else if (tag == siptag_organization_str) {
      if (value == -1)
	value = 0;
      NHP_SET_STR(nhp, organization, value);
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    }
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    /* NUTAG_REGISTRAR(registrar) */
    else if (tag == nutag_registrar) {
      NHP_SET_STR_BY_URL(nhp, registrar, value);
      if (NHP_ISSET(nhp, registrar) && !str0cmp(nhp->nhp_registrar, "*"))
	NHP_SET_STR(nhp, registrar, 0);
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    }
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    /* NUTAG_INSTANCE(instance) */
    else if (tag == nutag_instance) {
      NHP_SET_STR(nhp, instance, value);
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    }
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    /* NUTAG_M_DISPLAY(m_display) */
    else if (tag == nutag_m_display) {
      NHP_SET_STR(nhp, m_display, value);
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    }
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    /* NUTAG_M_USERNAME(m_username) */
    else if (tag == nutag_m_username) {
      NHP_SET_STR(nhp, m_username, value);
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    }
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    /* NUTAG_M_PARAMS(m_params) */
    else if (tag == nutag_m_params) {
      NHP_SET_STR(nhp, m_params, value);
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    }
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    /* NUTAG_M_FEATURES(m_features) */
    else if (tag == nutag_m_features) {
      NHP_SET_STR(nhp, m_features, value);
876
    }
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    /* NUTAG_OUTBOUND(outbound) */
    else if (tag == nutag_outbound) {
      NHP_SET_STR(nhp, outbound, value);
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    }
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    /* NUTAG_DETECT_NETWORK_UPDATES(detect_network_updates) */
    else if (global && tag == nutag_detect_network_updates) {
      int detector = (int)value;

      if (detector < NUA_NW_DETECT_NOTHING)
	detector = NUA_NW_DETECT_NOTHING;
      else if (detector > NUA_NW_DETECT_TRY_FULL)
	detector = NUA_NW_DETECT_TRY_FULL;

      NHP_SET(nhp, detect_network_updates, detector);
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    }
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  }

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  return 0;
}

/** Merge (when needed) new values with old values. */
static int nhp_merge_lists(su_home_t *home,
			   msg_hclass_t *hc,
			   msg_list_t **return_new_list,
			   msg_list_t const *old_list,
			   int already_set,
			   int already_parsed,
			   int always_merge,
			   tag_value_t value)
{
  msg_list_t *list, *elems;

  if (value == -1) {
    *return_new_list = NULL;
    return 1;
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  }

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  if (value == 0) {
    if (!already_set && !always_merge) {
      *return_new_list = NULL;
      return 1;
    }
    return 0;
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  }

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  if (already_parsed) 
    elems = (void *)msg_header_dup_as(home, hc, (msg_header_t *)value);
  else
    elems = (void *)msg_header_make(home, hc, (char const *)value);
926

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  if (!elems)
    return -1;

  list = (msg_list_t *)old_list;
931

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  if (!already_set) {
    if (always_merge && list) {
      list = (void *)msg_header_dup_as(home, hc, (void *)old_list);
      if (!list)
	return -1;
    }
    else
      list = NULL;
  }
941

942 943 944
  if (!list) {
    *return_new_list = elems;
    return 1;
945 946
  }

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  /* Add contents to the new list to the old list */
  if (msg_params_join(home, (msg_param_t **)&list->k_items, elems->k_items,
		      2 /* prune */, 0 /* don't dup */) < 0)
    return -1;
  
  *return_new_list = 
    (msg_list_t *)msg_header_dup_as(home, hc, (msg_header_t *)list);
  if (!*return_new_list)
    return -1;

  msg_header_free(home, (msg_header_t *)list);
  msg_header_free(home, (msg_header_t *)elems);

  return 1;
}

static
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nua_handle_preferences_t *nhp_move_params(su_home_t *home,
					  nua_handle_preferences_t *dst,
					  su_home_t *tmphome,
					  nua_handle_preferences_t const *src)
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{
  /* Update prefs structure */
  nua_handle_preferences_t tbf[1];

  if (dst == NULL)
    dst = su_zalloc(home, sizeof *dst);
  if (dst == NULL)
    return NULL;
  if (su_home_move(home, tmphome) < 0)
    return NULL;

  *tbf = *dst;
  nhp_or_set(dst, src);

  /* Handle pointer items. Free changed ones and zap unset ones. */
#define NHP_ZAP_OVERRIDEN(tbf, nhp, pref)				\
  (((tbf)->nhp_set.nhb_##pref						\
    && (tbf)->nhp_##pref != (nhp)->nhp_##pref				\
    ? su_free(home, (void *)(tbf)->nhp_##pref) : (void)0),		\
   (void)(!(nhp)->nhp_set.nhb_##pref ? (nhp)->nhp_##pref = NULL : NULL))

  NHP_ZAP_OVERRIDEN(tbf, dst, soa_name);
  NHP_ZAP_OVERRIDEN(tbf, dst, registrar);
  NHP_ZAP_OVERRIDEN(tbf, dst, supported);
  NHP_ZAP_OVERRIDEN(tbf, dst, allow);
  NHP_ZAP_OVERRIDEN(tbf, dst, user_agent);
  NHP_ZAP_OVERRIDEN(tbf, dst, organization);
  NHP_ZAP_OVERRIDEN(tbf, dst, instance);
  NHP_ZAP_OVERRIDEN(tbf, dst, m_display);
  NHP_ZAP_OVERRIDEN(tbf, dst, m_username);
  NHP_ZAP_OVERRIDEN(tbf, dst, m_params);
  NHP_ZAP_OVERRIDEN(tbf, dst, m_features);
  NHP_ZAP_OVERRIDEN(tbf, dst, outbound);

  return dst;
}

static int nua_handle_tags_filter(tagi_t const *f, tagi_t const *t);
static int nua_handle_param_filter(tagi_t const *f, tagi_t const *t);

/** Save taglist to a handle */
1009
int nua_handle_save_tags(nua_handle_t *nh, tagi_t *tags)
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{
  tagi_t const tagfilter[] = {
    { TAG_FILTER(nua_handle_tags_filter) },
    { TAG_NULL() }
  };
  tagi_t const paramfilter[] = {
    { TAG_FILTER(nua_handle_param_filter) },
    { TAG_NULL() }
  };

  /* Initialization parameters */
  url_string_t const *url = NULL;
  sip_to_t const *p_to = NULL;
  char const *to_str = NULL;
  sip_from_t from[1];
  sip_from_t const *p_from = NULL;
  char const *from_str = NULL;
  nua_handle_t *identity = NULL;

  tagi_t const *t;

  su_home_t tmphome[SU_HOME_AUTO_SIZE(1024)];

  int error;

  for (t = tags; t; t = tl_next(t)) {
    if (t->t_tag == NULL)
      break;
    /* SIPTAG_FROM_REF(p_from) */
    else if (t->t_tag == siptag_from) {
      p_from = (sip_from_t *)t->t_value, from_str = NULL;
    }
    /* SIPTAG_FROM_STR_REF(from_str) */
    else if (t->t_tag == siptag_from_str) {
      from_str = (char const *)t->t_value, p_from = NULL;
    }
    /* SIPTAG_TO_REF(p_to) */
    else if (t->t_tag == siptag_to) {
      p_to = (sip_to_t *)t->t_value, to_str = NULL;
    }
    /* SIPTAG_TO_STR_REF(to_str) */
    else if (t->t_tag == siptag_to_str) {
      to_str = (char const *)t->t_value, p_to = NULL;
    }
    /* NUTAG_IDENTITY_REF(identity) */
    else if (t->t_tag == nutag_identity) {
      identity = (nua_handle_t *)t->t_value;
    }
    /* NUTAG_URL_REF(url) */
    else if (t->t_tag == nutag_url) {
      url = (url_string_t *)t->t_value;
    }
    /* NUTAG_SIPS_URL_REF(url) */
    else if (t->t_tag == nutag_url) {
      url = (url_string_t *)t->t_value;
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    }
  }

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  su_home_auto(tmphome, sizeof tmphome);

  if (p_from)
    ;
  else if (from_str)
    p_from = sip_from_make(tmphome, from_str);
  else if (!p_from && nh->nh_nua->nua_from)
    *from = *nh->nh_nua->nua_from, from->a_params = NULL, p_from = from;
  else
    p_from = SIP_NONE;    /* XXX - why? */

  if (p_to)
    ;
  else if (to_str)
    p_to = sip_to_make(tmphome, to_str);
  else if (url) 
    p_to = sip_to_create(tmphome, url);
  else
    p_to = SIP_NONE;
  
  if (p_to == NULL || p_from == NULL) {
    su_home_deinit(tmphome);
    return -1;
  }

  nh->nh_tags = 
    tl_filtered_tlist(nh->nh_home, tagfilter,
		      SIPTAG_FROM(p_from),
		      TAG_FILTER(nua_handle_tags_filter),
		      SIPTAG_TO(p_to),
		      TAG_FILTER(nua_handle_tags_filter),
		      TAG_NEXT(tags));

  nh->nh_ptags = 
    tl_filtered_tlist(nh->nh_home, paramfilter, TAG_NEXT(tags));

  error = nh->nh_tags == NULL || nh->nh_ptags == NULL;

  if (!error)
    tl_gets(nh->nh_tags,	/* These does not change while nh lives */
	    SIPTAG_FROM_REF(nh->nh_ds->ds_local),
	    SIPTAG_TO_REF(nh->nh_ds->ds_remote),
	    TAG_END());

  if (nh->nh_ptags && nh->nh_ptags->t_tag == NULL)
    su_free(nh->nh_home, nh->nh_ptags), nh->nh_ptags = NULL;
    
  if (identity)
    nh->nh_identity = nua_handle_ref(identity);

1118 1119
  su_home_deinit(tmphome);

1120 1121 1122 1123 1124 1125 1126
  return -error;
}

/** Filter tags used for settings. */
static int nua_handle_param_filter(tagi_t const *f, tagi_t const *t)
{
  char const *ns;
1127

1128 1129
  if (!t || !t->t_tag)
    return 0;
1130

1131 1132 1133 1134 1135 1136 1137 1138
  if (t->t_tag == nutag_url || 
      t->t_tag == nutag_sips_url ||
      t->t_tag == nutag_identity)
    return 0;

  ns = t->t_tag->tt_ns; 
  if (!ns)
    return 0;
1139

1140 1141
  return strcmp(ns, "nua") == 0 && strcmp(ns, "soa") == 0;
}
1142

1143 1144 1145 1146
/** Filter tags stored permanently as taglist. */
static int nua_handle_tags_filter(tagi_t const *f, tagi_t const *t)
{
  tag_type_t tag;
1147

1148 1149
  if (!t || !t->t_tag)
    return 0;
1150

1151
  tag = t->t_tag;
1152

1153 1154 1155 1156 1157 1158 1159 1160 1161 1162
  if (tag == tag_filter)
    return 0;
  
  /* Accept @From or @To only when they are followed by
     TAG_FILTER(nua_handle_tags_filter) */
  if (tag == siptag_from || tag == siptag_to) {
    t = tl_next(t);
    return t && t->t_tag == tag_filter && 
      t->t_value == (tag_value_t)nua_handle_tags_filter;
  }
1163

1164 1165 1166 1167 1168 1169
  if (tag == nutag_identity)
    return 0;
  if (tag == siptag_from_str)
    return 0;
  if (tag == siptag_to_str)
    return 0;
1170

1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181
  /** Ignore @CSeq, @RSeq, @RAck, @Timestamp, and @ContentLength */
  if (tag == siptag_cseq || tag == siptag_cseq_str)
    return 0;
  if (tag == siptag_rseq || tag == siptag_rseq_str)
    return 0;
  if (tag == siptag_rack || tag == siptag_rack_str)
    return 0;
  if (tag == siptag_timestamp || tag == siptag_timestamp_str)
    return 0;
  if (tag == siptag_content_length || tag == siptag_content_length_str)
    return 0;
1182

1183
  return ! nua_handle_param_filter(f, t);
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}

static
int nua_stack_set_smime_params(nua_t *nua, tagi_t const *tags)
{
#if HAVE_SOFIA_SMIME
  int           smime_enable = nua->sm->sm_enable;
  int           smime_opt = nua->sm->sm_opt;
  int           smime_protection_mode = nua->sm->sm_protection_mode;
  char const   *smime_message_digest = NONE;
  char const   *smime_signature = NONE;
  char const   *smime_key_encryption = NONE;
  char const   *smime_message_encryption = NONE;
  char const   *smime_path = NONE;

  int n;

  n = tl_gets(tags,
	      NUTAG_SMIME_ENABLE_REF(smime_enable),
	      NUTAG_SMIME_OPT_REF(smime_opt),
	      NUTAG_SMIME_PROTECTION_MODE_REF(smime_protection_mode),
	      NUTAG_SMIME_MESSAGE_DIGEST_REF(smime_message_digest),
	      NUTAG_SMIME_SIGNATURE_REF(smime_signature),
	      NUTAG_SMIME_KEY_ENCRYPTION_REF(smime_key_encryption),
	      NUTAG_SMIME_MESSAGE_ENCRYPTION_REF(smime_message_encryption),
	      NUTAG_CERTIFICATE_DIR_REF(smime_path),
	      TAG_NULL());
  if (n <= 0)
    return n;

  /* XXX - all other S/MIME parameters? */
  return sm_set_params(nua->sm, smime_enable, smime_opt, 
		       smime_protection_mode, smime_path);
#endif

  return 0;
}

/**@fn void nua_get_params(nua_t *nua, tag_type_t tag, tag_value_t value, ...)
 *
1224 1225
 * Get NUA parameters matching with the given filter.
 * The values of NUA parameters is returned in #nua_r_get_params event.
1226 1227 1228 1229 1230 1231 1232 1233
 *
 * @param nua             Pointer to NUA stack object
 * @param tag, value, ... List of tagged parameters
 *
 * @return
 *     nothing
 *
 * @par Related tags:
1234 1235
 *     TAG_ANY() \n
 *     otherwise same tags as nua_set_params()
1236 1237 1238
 *
 * @par Events:
 *     #nua_r_get_params
1239 1240 1241 1242 1243 1244
 *
 * @par Examples
 * Find out default values of all parameters:
 * @code
 *    nua_get_params(nua, TAG_ANY(), TAG_END());
 * @endcode
1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274
 */

/**@fn void nua_get_hparams(nua_handle_t *nh, tag_type_t tag, tag_value_t value, ...)
 * 
 * Get values of handle-specific parameters in nua_r_get_params event.
 *
 * Application will specify either expilicit list of tags it is interested
 * in, or a filter (at the moment, TAG_ANY()). The values are returned as a
 * list of tags in the nua_r_get_params event.
 *
 * @param nh              Pointer to operation handle
 * @param tag, value, ... List of tagged parameters
 *
 * The handle-specific parameters will contain only the parameters actually
 * modified by application, either by nua_set_hparams() or some other
 * handle-specific call. Currently, no NTA parameters are returned. They are
 * returned only when application asks for user-agent-level parameters using
 * either nua_get_params() or using default handle, eg.
 * @code
 * nua_get_hparams(nua_default(nua), TAG_ANY())
 * @endcode
 *
 * @return
 *     nothing
 *
 * @par Related tags:
 *     #TAG_ANY \n
 *     othervise same tags as nua_set_hparams()
 *
 * @par Events:
1275
 *     #nua_r_get_params
1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340
 */

/**@internal
 * Send a list of NUA parameters to the application.
 *
 * This function gets invoked when application calls either nua_get_params()
 * or nua_get_hparams().
 *
 * The parameter tag list will initially contain all the relevant parameter
 * tags, and it will be filtered down to parameters asked by application.
 *
 * The handle-specific parameters will contain only the parameters actually
 * modified by application, either by nua_set_hparams() or some other
 * handle-specific call. NTA parameters are returned only when application
 * asks for user-agent-level parameters using nua_get_params().
 *
 */
int nua_stack_get_params(nua_t *nua, nua_handle_t *nh, nua_event_t e,
			 tagi_t const *tags)
{
  nua_handle_t *dnh = nua->nua_dhandle;
  nua_handle_preferences_t const *nhp = nh->nh_prefs;

  tagi_t *lst;

  int has_from;
  sip_from_t from[1];

  sip_contact_t const *m;

  /* nta */
  unsigned udp_mtu = 0, sip_t1 = 0, sip_t2 = 0, sip_t4 = 0, sip_t1x64 = 0;
  unsigned debug_drop_prob = 0;
  url_string_t const *proxy = NULL;
  sip_contact_t const *aliases = NULL;
  unsigned flags = 0;

  /* soa */
  tagi_t *media_params = NULL;

  su_home_t tmphome[SU_HOME_AUTO_SIZE(16536)];

  enter;

  su_home_auto(tmphome, sizeof(tmphome));

  nta_agent_get_params(nua->nua_nta,
		       NTATAG_UDP_MTU_REF(udp_mtu),
		       NTATAG_SIP_T1_REF(sip_t1),
		       NTATAG_SIP_T2_REF(sip_t2),
		       NTATAG_SIP_T4_REF(sip_t4),
		       NTATAG_SIP_T1X64_REF(sip_t1x64),
		       NTATAG_DEBUG_DROP_PROB_REF(debug_drop_prob),
		       NTATAG_DEFAULT_PROXY_REF(proxy),
		       NTATAG_ALIASES_REF(aliases),
		       NTATAG_SIPFLAGS_REF(flags),
		       TAG_END());

  if (nh->nh_ds->ds_local)
    has_from = 1, *from = *nh->nh_ds->ds_local, from->a_params = NULL;
  else
    has_from = 0;

  media_params = soa_get_paramlist(nh->nh_soa, TAG_END());

1341
  m = nua_stack_get_contact(nua->nua_registrations);
1342

1343
  /* Include tag in the list returned to user
1344 1345
   * if it has been earlier set (by user) */
#define TIF(TAG, pref) \
1346
  TAG_IF(nhp->nhp_set.nhb_##pref, TAG(nhp->nhp_##pref))
1347 1348 1349 1350

  /* Include string tag made out of SIP header
   * if it has been earlier set (by user) */
#define TIF_STR(TAG, pref)						\
1351 1352
  TAG_IF(nhp->nhp_set.nhb_##pref,				\
	 TAG(nhp->nhp_set.nhb_##pref && nhp->nhp_##pref	\
1353 1354
	     ? sip_header_as_string(tmphome, (void *)nhp->nhp_##pref) : NULL))

1355 1356 1357 1358 1359 1360 1361 1362
  /* Include header tag made out of string
   * if it has been earlier set (by user) */
#define TIF_SIP(TAG, pref)						\
  TAG_IF(nhp->nhp_set.nhb_##pref,					\
	 TAG(nhp->nhp_set.nhb_##pref && nhp->nhp_##pref			\
	     ? sip_##pref##_make(tmphome, (char *)nhp->nhp_##pref)	\
	     : NULL))