155 lines
3.2 KiB
C
155 lines
3.2 KiB
C
/**
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* @file interfaces.c
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*
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* @brief Implementation of interfaces_t.
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*
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*/
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/*
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* Copyright (C) 2006 Tobias Brunner, Daniel Roethlisberger
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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 <net/if.h>
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#include <ifaddrs.h>
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#include <string.h>
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#include "interfaces.h"
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typedef struct private_interfaces_t private_interfaces_t;
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/**
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* Private data of an interfaces_t object.
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*/
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struct private_interfaces_t {
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/**
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* Public part of a interfaces_t object.
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*/
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interfaces_t public;
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/**
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* port that gets added to the host_t obbjects
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*/
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u_int16_t port;
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/**
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* list of addresses
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*/
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linked_list_t *addresses;
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};
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/**
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* Implements interfaces_t.get_addresses
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*/
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static linked_list_t* get_addresses(private_interfaces_t *this)
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{
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return this->addresses;
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}
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/**
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* Implements interfaces_t.is_local_address
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*/
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static bool is_local_address(private_interfaces_t *this, host_t *host)
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{
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iterator_t *iterator;
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host_t *lhost;
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if (host->is_anyaddr(host))
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{
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return FALSE;
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}
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iterator = this->addresses->create_iterator(this->addresses, TRUE);
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while (iterator->iterate(iterator, (void**)&lhost))
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{
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if (host->get_family(host) == lhost->get_family(lhost) &&
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streq(host->get_address(host), lhost->get_address(lhost)))
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{
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iterator->destroy(iterator);
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return TRUE;
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}
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}
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iterator->destroy(iterator);
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return FALSE;
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}
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/**
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* Implements interfaces_t.destroy.
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*/
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static void destroy(private_interfaces_t *this)
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{
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host_t *host;
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while (this->addresses->remove_last(this->addresses, (void**)&host) == SUCCESS)
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{
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host->destroy(host);
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}
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this->addresses->destroy(this->addresses);
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free(this);
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}
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static status_t initialize(private_interfaces_t *this)
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{
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struct ifaddrs *list;
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struct ifaddrs *cur;
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host_t *host;
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if (getifaddrs(&list) < 0)
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{
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return FAILED;
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}
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for (cur = list; cur != NULL; cur = cur->ifa_next)
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{
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if (!(cur->ifa_flags & IFF_UP))
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continue;
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if (cur->ifa_addr == NULL || cur->ifa_addr->sa_family != AF_INET)
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continue;
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host = host_create_from_sockaddr(cur->ifa_addr);
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if (host) {
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host->set_port(host, this->port);
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this->addresses->insert_last(this->addresses, (void*) host);
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}
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}
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freeifaddrs(list);
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return SUCCESS;
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}
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/*
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* Documented in header
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*/
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interfaces_t *interfaces_create(u_int16_t port)
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{
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private_interfaces_t *this = malloc_thing(private_interfaces_t);
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this->port = port;
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this->public.get_addresses = (linked_list_t* (*) (interfaces_t*)) get_addresses;
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this->public.is_local_address = (bool (*) (interfaces_t*, host_t*)) is_local_address;
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this->public.destroy = (void (*) (interfaces_t*)) destroy;
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this->addresses = linked_list_create();
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if (initialize(this) != SUCCESS)
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{
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destroy(this);
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return NULL;
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}
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return &this->public;
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}
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