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;
  int 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

static
int already_contains_package_name(char const *s)
{
  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
 */
static int 
nhp_set_tags(su_home_t *home, 
	     nua_handle_preferences_t *nhp,
	     int global,
	     tagi_t const *tags)
{

/* 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;
654 655

  for (t = tags; t; t = tl_next(t)) {
656 657 658 659
    tag_type_t tag = t->t_tag;
    tag_value_t value = t->t_value;

    if (tag == NULL)
660 661
      break;
    /* NUTAG_RETRY_COUNT(retry_count) */
662 663
    else if (tag == nutag_retry_count) {
      NHP_SET(nhp, retry_count, (unsigned)value);
664 665
    }
    /* NUTAG_MAX_SUBSCRIPTIONS(max_subscriptions) */
666 667 668 669 670 671 672 673 674 675
    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);
676 677
    }
    /* NUTAG_ENABLEINVITE(invite_enable) */
678 679
    else if (tag == nutag_enableinvite) {
      NHP_SET(nhp, invite_enable, value != 0);
680 681
    }
    /* NUTAG_AUTOALERT(auto_alert) */
682 683
    else if (tag == nutag_autoalert) {
      NHP_SET(nhp, auto_alert, value != 0);
684 685
    }
    /* NUTAG_EARLY_MEDIA(early_media) */
686 687
    else if (tag == nutag_early_media) {
      NHP_SET(nhp, early_media, value != 0);
688
    }
689
    /* NUTAG_ONLY183_100REL(only183_100rel) */
690 691
    else if (tag == nutag_only183_100rel) {
      NHP_SET(nhp, only183_100rel, value != 0);
692
    }
693
    /* NUTAG_AUTOANSWER(auto_answer) */
694 695
    else if (tag == nutag_autoanswer) {
      NHP_SET(nhp, auto_answer, value != 0);
696 697
    }
    /* NUTAG_AUTOACK(auto_ack) */
698 699
    else if (tag == nutag_autoack) {
      NHP_SET(nhp, auto_ack, value != 0);
700 701
    }
    /* NUTAG_INVITE_TIMER(invite_timeout) */
702 703
    else if (tag == nutag_invite_timer) {
      NHP_SET(nhp, invite_timeout, (unsigned)value);
704 705
    }
    /* NUTAG_SESSION_TIMER(session_timer) */
706 707
    else if (tag == nutag_session_timer) {
      NHP_SET(nhp, session_timer, (unsigned)value);
708 709
    }
    /* NUTAG_MIN_SE(min_se) */
710 711
    else if (tag == nutag_min_se) {
      NHP_SET(nhp, min_se, (unsigned)value);
712 713
    }
    /* NUTAG_SESSION_REFRESHER(refresher) */
714 715 716 717 718 719 720 721 722
    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);
723 724
    }
    /* NUTAG_UPDATE_REFRESH(update_refresh) */
725 726
    else if (tag == nutag_update_refresh) {
      NHP_SET(nhp, update_refresh, value != 0);
727 728
    }
    /* NUTAG_ENABLEMESSAGE(message_enable) */
729 730
    else if (tag == nutag_enablemessage) {
      NHP_SET(nhp, message_enable, value != 0);
731 732
    }
    /* NUTAG_ENABLEMESSENGER(win_messenger_enable) */
733 734
    else if (tag == nutag_enablemessenger) {
      NHP_SET(nhp, win_messenger_enable, value != 0);
735 736 737
    }
#if 0
    /* NUTAG_MESSAGE_AUTOANSWER(message_auto_respond) */
738 739
    else if (tag == nutag_message_autoanwer) {
      NHP_SET(nhp, message_auto_respond, value);
740 741 742
    }
#endif
    /* NUTAG_CALLEE_CAPS(callee_caps) */
743 744
    else if (tag == nutag_callee_caps) {
      NHP_SET(nhp, callee_caps, value != 0);
745 746
    }
    /* NUTAG_MEDIA_FEATURES(media_features) */
747 748
    else if (tag == nutag_media_features) {
      NHP_SET(nhp, media_features, value != 0);
749 750
    }
    /* NUTAG_SERVICE_ROUTE_ENABLE(service_route_enable) */
751 752
    else if (tag == nutag_service_route_enable) {
      NHP_SET(nhp, service_route_enable, value != 0);
753 754
    }
    /* NUTAG_PATH_ENABLE(path_enable) */
755 756
    else if (tag == nutag_path_enable) {
      NHP_SET(nhp, path_enable, value != 0);
757
    }
758
    /* NUTAG_REFER_EXPIRES(refer_expires) */
759 760
    else if (tag == nutag_refer_expires) {
      NHP_SET(nhp, refer_expires, value);
761 762
    }
    /* NUTAG_REFER_WITH_ID(refer_with_id) */
763 764
    else if (tag == nutag_refer_with_id) {
      NHP_SET(nhp, refer_with_id, value != 0);
765
    }
766
    /* NUTAG_SUBSTATE(substate) */
767 768
    else if (tag == nutag_substate) {
      NHP_SET(nhp, substate, (int)value);
769 770
    }
    /* NUTAG_KEEPALIVE(keepalive) */
771 772
    else if (tag == nutag_keepalive) {
      NHP_SET(nhp, keepalive, (unsigned)value);
773 774
    }
    /* NUTAG_KEEPALIVE_STREAM(keepalive_stream) */
775 776
    else if (tag == nutag_keepalive_stream) {
      NHP_SET(nhp, keepalive_stream, (unsigned)value);
777 778
    }

779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797
    /* 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);
798
    }
799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817
    /* 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);
818
    }
819 820 821
    /* SIPTAG_USER_AGENT(user_agent) */
    else if (tag == siptag_user_agent) {
      NHP_SET_STR_BY_HEADER(nhp, user_agent, value);
822
    }
823 824 825 826 827
    /* 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);
828
    }
829 830 831 832 833 834 835 836 837 838 839 840 841
    /* NUTAG_USER_AGENT(ua_name) */
    else if (tag == nutag_user_agent) {
      /* Add contents of NUTAG_USER_AGENT() to our distribution name */
      char const *value = (void *)value, *ua;

      if (value && !already_contains_package_name(value))
	ua = su_sprintf(home, "%s %s", value, NHP_USER_AGENT);
      else if (value)
	ua = su_strdup(home, value);
      else
	ua = su_strdup(home, NHP_USER_AGENT);

      NHP_SET(nhp, user_agent, ua);
842
    }
843 844 845
    /* SIPTAG_ORGANIZATION(organization) */
    else if (tag == siptag_organization) {
      NHP_SET_STR_BY_HEADER(nhp, organization, value);
846
    }
847 848 849 850 851
    /* SIPTAG_ORGANIZATION_STR(organization_str) */
    else if (tag == siptag_organization_str) {
      if (value == -1)
	value = 0;
      NHP_SET_STR(nhp, organization, value);
852
    }
853 854 855 856 857
    /* 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);
858
    }
859 860 861
    /* NUTAG_INSTANCE(instance) */
    else if (tag == nutag_instance) {
      NHP_SET_STR(nhp, instance, value);
862
    }
863 864 865
    /* NUTAG_M_DISPLAY(m_display) */
    else if (tag == nutag_m_display) {
      NHP_SET_STR(nhp, m_display, value);
866
    }
867 868 869
    /* NUTAG_M_USERNAME(m_username) */
    else if (tag == nutag_m_username) {
      NHP_SET_STR(nhp, m_username, value);
870
    }
871 872 873
    /* NUTAG_M_PARAMS(m_params) */
    else if (tag == nutag_m_params) {
      NHP_SET_STR(nhp, m_params, value);
874
    }
875 876 877
    /* NUTAG_M_FEATURES(m_features) */
    else if (tag == nutag_m_features) {
      NHP_SET_STR(nhp, m_features, value);
878
    }
879 880 881
    /* NUTAG_OUTBOUND(outbound) */
    else if (tag == nutag_outbound) {
      NHP_SET_STR(nhp, outbound, value);
882
    }
883 884 885 886 887 888 889 890 891 892
    /* 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);
893
    }
894 895
  }

896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913
  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;
914 915
  }

916 917 918 919 920 921
  if (value == 0) {
    if (!already_set && !always_merge) {
      *return_new_list = NULL;
      return 1;
    }
    return 0;
922 923
  }

924 925 926 927
  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);
928

929 930 931 932
  if (!elems)
    return -1;

  list = (msg_list_t *)old_list;
933

934 935 936 937 938 939 940 941 942
  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;
  }
943

944 945 946
  if (!list) {
    *return_new_list = elems;
    return 1;
947 948
  }

949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068
  /* 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
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)
{
  /* 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 */
int
nua_handle_save_tags(nua_handle_t *nh, tagi_t *tags)
{
  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;
1069 1070 1071
    }
  }

1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121
  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);

1122 1123
  su_home_deinit(tmphome);

1124 1125 1126 1127 1128 1129 1130
  return -error;
}

/** Filter tags used for settings. */
static int nua_handle_param_filter(tagi_t const *f, tagi_t const *t)
{
  char const *ns;
1131

1132 1133
  if (!t || !t->t_tag)
    return 0;
1134

1135 1136 1137 1138 1139 1140 1141 1142
  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;
1143

1144 1145
  return strcmp(ns, "nua") == 0 && strcmp(ns, "soa") == 0;
}
1146

1147 1148 1149 1150
/** Filter tags stored permanently as taglist. */
static int nua_handle_tags_filter(tagi_t const *f, tagi_t const *t)
{
  tag_type_t tag;
1151

1152 1153
  if (!t || !t->t_tag)
    return 0;
1154

1155
  tag = t->t_tag;
1156

1157 1158 1159 1160 1161 1162 1163 1164 1165 1166
  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;
  }
1167

1168 1169 1170 1171 1172 1173
  if (tag == nutag_identity)
    return 0;
  if (tag == siptag_from_str)
    return 0;
  if (tag == siptag_to_str)
    return 0;
1174

1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185
  /** 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;
1186

1187
  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, ...)
 *
1228 1229
 * Get NUA parameters matching with the given filter.
 * The values of NUA parameters is returned in #nua_r_get_params event.
1230 1231 1232 1233 1234 1235 1236 1237
 *
 * @param nua             Pointer to NUA stack object
 * @param tag, value, ... List of tagged parameters
 *
 * @return
 *     nothing
 *
 * @par Related tags:
1238 1239
 *     TAG_ANY() \n
 *     otherwise same tags as nua_set_params()
1240 1241 1242
 *
 * @par Events:
 *     #nua_r_get_params
1243 1244 1245 1246 1247 1248
 *
 * @par Examples
 * Find out default values of all parameters:
 * @code
 *    nua_get_params(nua, TAG_ANY(), TAG_END());
 * @endcode
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 1275 1276 1277 1278
 */

/**@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:
1279
 *     #nua_r_get_params
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 1341 1342 1343 1344
 */

/**@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());

1345
  m = nua_stack_get_contact(nua->nua_registrations);
1346

1347
  /* Include tag in the list returned to user
1348 1349
   * if it has been earlier set (by user) */
#define TIF(TAG, pref) \
1350
  TAG_IF(nhp->nhp_set.nhb_##pref, TAG(nhp->nhp_##pref))
1351 1352 1353 1354

  /* Include string tag made out of SIP header
   * if it has been earlier set (by user) */
#define TIF_STR(TAG, pref)						\
1355 1356
  TAG_IF(nhp->nhp_set.nhb_##pref,				\
	 TAG(nhp->nhp_set.nhb_##pref && nhp->nhp_##pref	\
1357 1358
	     ? sip_header_as_string(tmphome, (void *)nhp->nhp_##pref) : NULL))

1359 1360 1361 1362 1363 1364 1365 1366
  /* 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))

1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377
  lst = tl_filtered_tlist
    (tmphome, tags,
     TAG_IF(has_from, SIPTAG_FROM(from)),
     TAG_IF(has_from,
	    SIPTAG_FROM_STR(has_from
			    ? sip_header_as_string(tmphome, (void *)from)
			    : NULL)),

     TIF(NUTAG_RETRY_COUNT, retry_count),
     TIF(NUTAG_MAX_SUBSCRIPTIONS, max_subscriptions),

1378 1379
     TIF(NUTAG_SOA_NAME, soa_name),
     TIF(NUTAG_MEDIA_ENABLE, media_enable),
1380 1381 1382
     TIF(NUTAG_ENABLEINVITE, invite_enable),
     TIF(NUTAG_AUTOALERT, auto_alert),
     TIF(NUTAG_EARLY_MEDIA, early_media),
1383
     TIF(NUTAG_ONLY183_100REL, only183_100rel),
1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400
     TIF(NUTAG_AUTOANSWER, auto_answer),
     TIF(NUTAG_AUTOACK, auto_ack),
     TIF(NUTAG_INVITE_TIMER, invite_timeout),

     TIF(NUTAG_SESSION_TIMER, session_timer),
     TIF(NUTAG_MIN_SE, min_se),
     TIF(NUTAG_SESSION_REFRESHER, refresher),
     TIF(NUTAG_UPDATE_REFRESH,