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/**
* @file interfaces.c
*
* @brief Implementation of interfaces_t.
*
*/
/*
* Copyright (C) 2006 Tobias Brunner, Daniel Roethlisberger
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <net/if.h>
#include <ifaddrs.h>
#include <string.h>
#include "interfaces.h"
typedef struct private_interfaces_t private_interfaces_t;
/**
* Private data of an interfaces_t object.
*/
struct private_interfaces_t {
/**
* Public part of a interfaces_t object.
*/
interfaces_t public;
/**
* port that gets added to the host_t obbjects
*/
u_int16_t port;
/**
* list of addresses
*/
linked_list_t *addresses;
};
/**
* Implements interfaces_t.create_address_iterator
*/
static iterator_t* create_address_iterator(private_interfaces_t *this)
{
return this->addresses->create_iterator(this->addresses, TRUE);
}
/**
* Implements interfaces_t.is_local_address
*/
static bool is_local_address(private_interfaces_t *this, host_t *host)
{
iterator_t *iterator;
host_t *lhost;
if (host->is_anyaddr(host))
{
return FALSE;
}
iterator = this->addresses->create_iterator(this->addresses, TRUE);
while (iterator->iterate(iterator, (void**)&lhost))
{
if (host->get_family(host) == lhost->get_family(lhost) &&
streq(host->get_string(host), lhost->get_string(lhost)))
{
iterator->destroy(iterator);
return TRUE;
}
}
iterator->destroy(iterator);
return FALSE;
}
/**
* Implements interfaces_t.destroy.
*/
static void destroy(private_interfaces_t *this)
{
host_t *host;
while (this->addresses->remove_last(this->addresses, (void**)&host) == SUCCESS)
{
host->destroy(host);
}
this->addresses->destroy(this->addresses);
free(this);
}
static status_t initialize(private_interfaces_t *this)
{
struct ifaddrs *list;
struct ifaddrs *cur;
host_t *host;
if (getifaddrs(&list) < 0)
{
return FAILED;
}
for (cur = list; cur != NULL; cur = cur->ifa_next)
{
if (!(cur->ifa_flags & IFF_UP))
continue;
if (cur->ifa_addr == NULL || cur->ifa_addr->sa_family != AF_INET)
continue;
host = host_create_from_sockaddr(cur->ifa_addr);
if (host) {
host->set_port(host, this->port);
this->addresses->insert_last(this->addresses, (void*) host);
}
}
freeifaddrs(list);
return SUCCESS;
}
/*
* Documented in header
*/
interfaces_t *interfaces_create(u_int16_t port)
{
private_interfaces_t *this = malloc_thing(private_interfaces_t);
this->port = port;
this->public.create_address_iterator = (iterator_t* (*) (interfaces_t*)) create_address_iterator;
this->public.is_local_address = (bool (*) (interfaces_t*, host_t*)) is_local_address;
this->public.destroy = (void (*) (interfaces_t*)) destroy;
this->addresses = linked_list_create();
if (initialize(this) != SUCCESS)
{
destroy(this);
return NULL;
}
return &this->public;
}
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