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153 lines
3.8 KiB
153 lines
3.8 KiB
/*
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* $Id$
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*
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* Path handling for intermediate proxies
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*
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* Copyright (C) 2006 Inode GmbH (Andreas Granig <andreas.granig@inode.info>)
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*
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* This file is part of Kamailio, a free SIP server.
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*
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* Kamailio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version
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*
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* Kamailio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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/*! \file
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* \brief Path :: Core
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*
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* \ingroup path
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* - Module: path
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*/
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/*! \defgroup path Path:: Handling of "path" header for intermediate proxies
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* This module is designed to be used at intermediate sip proxies
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* like loadbalancers in front of registrars and proxies. It
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* provides functions for inserting a Path header including a
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* parameter for passing forward the received-URI of a
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* registration to the next hop. It also provides a mechanism for
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* evaluating this parameter in subsequent requests and to set the
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* destination URI according to it.
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*
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* - No developer API
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* - No MI functions
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "../../sr_module.h"
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#include "../../mem/mem.h"
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#include "../../mod_fix.h"
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#include "../outbound/api.h"
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#include "../rr/api.h"
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#include "path.h"
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#include "path_mod.h"
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MODULE_VERSION
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/*! \brief If received-param of current Route uri should be used
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* as dst-uri. */
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int use_received = 0;
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/*! \brief
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* Module initialization function prototype
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*/
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static int mod_init(void);
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/*! \brief
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* rr callback API
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*/
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struct rr_binds path_rrb;
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/*! \brief
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* outbound API
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*/
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ob_api_t path_obb;
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/*! \brief
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* Exported functions
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*/
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static cmd_export_t cmds[] = {
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{ "add_path", (cmd_function)add_path, 0,
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0, 0, REQUEST_ROUTE },
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{ "add_path", (cmd_function)add_path_usr, 1,
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fixup_spve_null, 0, REQUEST_ROUTE },
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{ "add_path", (cmd_function)add_path_usr, 2,
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fixup_spve_spve, 0, REQUEST_ROUTE },
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{ "add_path_received", (cmd_function)add_path_received, 0,
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0, 0, REQUEST_ROUTE },
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{ "add_path_received", (cmd_function)add_path_received_usr, 1,
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fixup_spve_null, 0, REQUEST_ROUTE },
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{ "add_path_received", (cmd_function)add_path_received_usr, 2,
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fixup_spve_spve, 0, REQUEST_ROUTE },
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{ 0, 0, 0, 0, 0, 0 }
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};
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/*! \brief
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* Exported parameters
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*/
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static param_export_t params[] = {
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{"use_received", INT_PARAM, &use_received },
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{ 0, 0, 0 }
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};
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/*! \brief
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* Module interface
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*/
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struct module_exports exports = {
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"path",
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DEFAULT_DLFLAGS, /* dlopen flags */
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cmds, /* Exported functions */
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params, /* Exported parameters */
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0, /* exported statistics */
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0, /* exported MI functions */
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0, /* exported pseudo-variables */
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0, /* extra processes */
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mod_init, /* module initialization function */
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0, /* response function */
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0, /* destroy function */
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0 /* child initialization function */
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};
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static int mod_init(void)
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{
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if (use_received) {
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if (load_rr_api(&path_rrb) != 0) {
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LM_ERR("failed to load rr-API\n");
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return -1;
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}
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if (path_rrb.register_rrcb(path_rr_callback, 0) != 0) {
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LM_ERR("failed to register rr callback\n");
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return -1;
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}
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}
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if (ob_load_api(&path_obb) == 0)
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LM_DBG("Bound path module to outbound module\n");
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else {
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LM_INFO("outbound module not available\n");
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memset(&path_obb, 0, sizeof(ob_api_t));
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}
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return 0;
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}
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