/*
 * Copyright (c) 2011 Tobias Markmann
 * Licensed under the simplified BSD license.
 * See Documentation/Licenses/BSD-simplified.txt for more information.
 */

/*
 * Copyright (c) 2016 Isode Limited.
 * All rights reserved.
 * See the COPYING file for more information.
 */

#include <Swiften/Network/UnixNetworkEnvironment.h>

#include <map>
#include <string>
#include <vector>

#include <boost/optional.hpp>
#include <boost/signals2.hpp>

#include <arpa/inet.h>
#include <net/if.h>
#include <sys/socket.h>
#include <sys/types.h>

#ifndef __ANDROID__
#include <ifaddrs.h>
#endif

#include <Swiften/Network/HostAddress.h>
#include <Swiften/Network/NetworkInterface.h>

namespace Swift {

std::vector<NetworkInterface> UnixNetworkEnvironment::getNetworkInterfaces() const {
    std::map<std::string, NetworkInterface> interfaces;
#ifndef __ANDROID__
    ifaddrs* addrs = nullptr;
    int ret = getifaddrs(&addrs);
    if (ret != 0) {
        return std::vector<NetworkInterface>();
    }

    for (ifaddrs* a = addrs; a != nullptr; a = a->ifa_next) {
        std::string name(a->ifa_name);
        boost::optional<HostAddress> address;
        if (a->ifa_addr->sa_family == PF_INET) {
            sockaddr_in* sa = reinterpret_cast<sockaddr_in*>(a->ifa_addr);
            address = HostAddress(reinterpret_cast<const unsigned char*>(&(sa->sin_addr)), 4);
        }
        else if (a->ifa_addr->sa_family == PF_INET6) {
            sockaddr_in6* sa = reinterpret_cast<sockaddr_in6*>(a->ifa_addr);
            address = HostAddress(reinterpret_cast<const unsigned char*>(&(sa->sin6_addr)), 16);
        }
        if (address && !address->isLocalhost()) {
            std::map<std::string, NetworkInterface>::iterator i = interfaces.insert(std::make_pair(name, NetworkInterface(name, a->ifa_flags & IFF_LOOPBACK))).first;
            i->second.addAddress(*address);
        }
    }

    freeifaddrs(addrs);
#endif
    std::vector<NetworkInterface> result;
    for (std::map<std::string,NetworkInterface>::const_iterator i = interfaces.begin(); i != interfaces.end(); ++i) {
        result.push_back(i->second);
    }
    return result;
}

}