routing_utils.h

/*
 * Copyright (c) 2017, Matias Fontanini
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following disclaimer
 *   in the documentation and/or other materials provided with the
 *   distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef TINS_ROUTING_UTILS_H
#define TINS_ROUTING_UTILS_H

#include <vector>
#include <set>
#include <tins/macros.h>
#include <tins/ip_address.h>
#include <tins/ipv6_address.h>

// Fix for Windows interface define on combaseapi.h
#undef interface

namespace Tins {
namespace Utils {

struct RouteEntry {
    std::string interface;
    
    IPv4Address destination;
    
    IPv4Address gateway;
    
    IPv4Address mask;

    int metric;
};

struct Route6Entry {
    std::string interface;

    IPv6Address destination;

    IPv6Address mask;

    IPv6Address gateway;

    int metric;
};

template<typename ForwardIterator>
void route_entries(ForwardIterator output);

template<typename ForwardIterator>
void route6_entries(ForwardIterator output);

TINS_API std::vector<RouteEntry> route_entries();


TINS_API std::vector<Route6Entry> route6_entries();

TINS_API std::set<std::string> network_interfaces();

TINS_API bool gateway_from_ip(IPv4Address ip, IPv4Address& gw_addr);

TINS_API bool gateway_from_ip(IPv6Address ip, IPv6Address& gw_addr);

} // Utils
} // Tins

template<typename ForwardIterator>
void Tins::Utils::route_entries(ForwardIterator output) {
    std::vector<RouteEntry> entries = route_entries();
    for (size_t i = 0; i < entries.size(); ++i) {
        *output = entries[i];
        ++output;
    }
}

template<typename ForwardIterator>
void Tins::Utils::route6_entries(ForwardIterator output) {
    std::vector<Route6Entry> entries = route6_entries();
    for (size_t i = 0; i < entries.size(); ++i) {
        *output = entries[i];
        ++output;
    }
}

#endif // TINS_ROUTING_UTILS_H