p-cscf: Add attribute handler for P-CSCF server addresses
This commit is contained in:
Tobias Brunner
@@ -13,6 +13,7 @@ plugin_LTLIBRARIES = libstrongswan-p-cscf.la
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endif
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libstrongswan_p_cscf_la_SOURCES = \
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p_cscf_plugin.c p_cscf_plugin.h
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p_cscf_plugin.c p_cscf_plugin.h \
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p_cscf_handler.c p_cscf_handler.h
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libstrongswan_p_cscf_la_LDFLAGS = -module -avoid-version
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@@ -0,0 +1,153 @@
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/*
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* Copyright (C) 2016 Tobias Brunner
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "p_cscf_handler.h"
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#include <networking/host.h>
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#include <utils/debug.h>
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typedef struct private_p_cscf_handler_t private_p_cscf_handler_t;
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/**
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* Private data
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*/
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struct private_p_cscf_handler_t {
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/**
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* Public interface
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*/
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p_cscf_handler_t public;
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};
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METHOD(attribute_handler_t, handle, bool,
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private_p_cscf_handler_t *this, ike_sa_t *ike_sa,
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configuration_attribute_type_t type, chunk_t data)
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{
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host_t *server;
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int family = AF_INET6;
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switch (type)
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{
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case P_CSCF_IP4_ADDRESS:
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family = AF_INET;
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/* fall-through */
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case P_CSCF_IP6_ADDRESS:
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server = host_create_from_chunk(family, data, 0);
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if (!server)
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{
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DBG1(DBG_CFG, "received invalid P-CSCF server IP");
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return FALSE;
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}
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DBG1(DBG_CFG, "received P-CSCF server IP %H", server);
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server->destroy(server);
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return TRUE;
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default:
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return FALSE;
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}
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}
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METHOD(attribute_handler_t, release, void,
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private_p_cscf_handler_t *this, ike_sa_t *ike_sa,
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configuration_attribute_type_t type, chunk_t data)
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{
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switch (type)
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{
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case P_CSCF_IP4_ADDRESS:
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case P_CSCF_IP6_ADDRESS:
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/* nothing to do as we only log the server IPs */
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break;
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default:
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break;
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}
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}
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/**
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* Data for attribute enumerator
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*/
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typedef struct {
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enumerator_t public;
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bool request_ipv4;
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bool request_ipv6;
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} attr_enumerator_t;
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METHOD(enumerator_t, enumerate_attrs, bool,
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attr_enumerator_t *this, configuration_attribute_type_t *type,
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chunk_t *data)
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{
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if (this->request_ipv4)
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{
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*type = P_CSCF_IP4_ADDRESS;
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*data = chunk_empty;
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this->request_ipv4 = FALSE;
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return TRUE;
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}
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if (this->request_ipv6)
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{
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*type = P_CSCF_IP6_ADDRESS;
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*data = chunk_empty;
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this->request_ipv6 = FALSE;
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return TRUE;
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}
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return FALSE;
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}
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METHOD(attribute_handler_t, create_attribute_enumerator, enumerator_t *,
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private_p_cscf_handler_t *this, ike_sa_t *ike_sa,
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linked_list_t *vips)
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{
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attr_enumerator_t *enumerator;
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if (ike_sa->get_version(ike_sa) == IKEV1)
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{
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return enumerator_create_empty();
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}
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INIT(enumerator,
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.public = {
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.enumerate = (void*)_enumerate_attrs,
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.destroy = (void*)free,
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},
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.request_ipv4 = TRUE,
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.request_ipv6 = TRUE,
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);
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return &enumerator->public;
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}
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METHOD(p_cscf_handler_t, destroy, void,
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private_p_cscf_handler_t *this)
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{
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free(this);
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}
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/**
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* See header
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*/
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p_cscf_handler_t *p_cscf_handler_create()
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{
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private_p_cscf_handler_t *this;
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INIT(this,
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.public = {
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.handler = {
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.handle = _handle,
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.release = _release,
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.create_attribute_enumerator = _create_attribute_enumerator,
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},
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.destroy = _destroy,
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},
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);
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return &this->public;
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}
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@@ -0,0 +1,49 @@
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/*
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* Copyright (C) 2016 Tobias Brunner
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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/**
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* @defgroup p_cscf_handler p_cscf_handler
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* @{ @ingroup p_cscf
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*/
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#ifndef P_CSCF_HANDLER_H_
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#define P_CSCF_HANDLER_H_
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#include <attributes/attribute_handler.h>
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typedef struct p_cscf_handler_t p_cscf_handler_t;
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/**
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* Attribute handler for P-CSCF server addresses.
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*/
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struct p_cscf_handler_t {
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/**
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* Implements attribute_handler_t.
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*/
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attribute_handler_t handler;
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/**
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* Destroy a p_cscf_handler_t.
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*/
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void (*destroy)(p_cscf_handler_t *this);
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};
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/**
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* Create an p_cscf_handler_t instance.
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*/
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p_cscf_handler_t *p_cscf_handler_create();
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#endif /** P_CSCF_HANDLER_H_ @}*/
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@@ -14,6 +14,7 @@
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*/
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#include "p_cscf_plugin.h"
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#include "p_cscf_handler.h"
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#include <daemon.h>
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@@ -28,6 +29,11 @@ struct private_p_cscf_plugin_t {
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* Public interface
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*/
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p_cscf_plugin_t public;
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/**
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* P-CSCF server address attribute handler
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*/
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p_cscf_handler_t *handler;
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};
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METHOD(plugin_t, get_name, char*,
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@@ -36,9 +42,40 @@ METHOD(plugin_t, get_name, char*,
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return "p-cscf";
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}
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/**
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* Register handler
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*/
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static bool plugin_cb(private_p_cscf_plugin_t *this,
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plugin_feature_t *feature, bool reg, void *cb_data)
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{
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if (reg)
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{
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charon->attributes->add_handler(charon->attributes,
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&this->handler->handler);
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}
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else
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{
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charon->attributes->remove_handler(charon->attributes,
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&this->handler->handler);
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}
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return TRUE;
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}
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METHOD(plugin_t, get_features, int,
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private_p_cscf_plugin_t *this, plugin_feature_t *features[])
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{
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static plugin_feature_t f[] = {
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PLUGIN_CALLBACK((plugin_feature_callback_t)plugin_cb, NULL),
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PLUGIN_PROVIDE(CUSTOM, "p-cscf"),
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};
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*features = f;
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return countof(f);
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}
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METHOD(plugin_t, destroy, void,
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private_p_cscf_plugin_t *this)
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{
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this->handler->destroy(this->handler);
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free(this);
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}
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@@ -53,9 +90,11 @@ plugin_t *p_cscf_plugin_create()
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.public = {
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.plugin = {
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.get_name = _get_name,
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.get_features = _get_features,
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.destroy = _destroy,
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},
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},
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.handler = p_cscf_handler_create(),
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);
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return &this->public.plugin;
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