/*
 * .============.
 * // M A K E / \
 * // C++ DEV / \
 * // E A S Y / \/ \
 * ++ ----------. \/\ .
 * \\ \ \ /\ /
 * \\ \ \ /
 * \\ \ \ /
 * -============'
 *
 * Copyright (c) 2018 Hevake and contributors, all rights reserved.
 *
 * This file is part of cpp-tbox (https://github.com/cpp-main/cpp-tbox)
 * Use of this source code is governed by MIT license that can be found
 * in the LICENSE file in the root of the source tree. All contributing
 * project authors may be found in the CONTRIBUTORS.md file in the root
 * of the source tree.
 */
#include "net_if.h"

#include <arpa/inet.h>
#include <ifaddrs.h>
#include <errno.h>
#include <cstring>
#include <sstream>

#include <tbox/base/log.h>

namespace tbox {
namespace network {
namespace {

bool LoadFrom(NetIF &net_if, const struct ifaddrs *ifa)
{
 if (ifa->ifa_addr->sa_family != AF_INET) {
 LogWarn("%s is not IPv4", ifa->ifa_name);
 return false;
 }

 net_if.name = ifa->ifa_name;
 net_if.flags = ifa->ifa_flags;
 struct sockaddr_in *addr_v4 = (struct sockaddr_in*)ifa->ifa_addr;
 net_if.ip = addr_v4->sin_addr.s_addr;
 struct sockaddr_in *mask_v4 = (struct sockaddr_in*)ifa->ifa_netmask;
 net_if.mask = mask_v4->sin_addr.s_addr;
 return true;
}

}

bool GetNetIF(std::vector<NetIF> &net_if_vec)
{
 struct ifaddrs *if_list = nullptr;
 if (getifaddrs(&if_list) == 0) {
 for (auto ifa = if_list; ifa != nullptr; ifa = ifa->ifa_next) {
 NetIF net_if;
 if (LoadFrom(net_if, ifa))
 net_if_vec.push_back(std::move(net_if));
 }
 freeifaddrs(if_list);
 return true;

 } else {
 LogWarn("fail: errno:%d, %s", errno, strerror(errno));
 return false;
 }
}

bool GetNetIF(const std::string &name, std::vector<NetIF> &net_if_vec)
{
 struct ifaddrs *if_list = nullptr;
 if (getifaddrs(&if_list) == 0) {
 for (auto ifa = if_list; ifa != nullptr; ifa = ifa->ifa_next) {
 if (name != ifa->ifa_name)
 continue;

 NetIF net_if;
 if (LoadFrom(net_if, ifa))
 net_if_vec.push_back(std::move(net_if));
 }
 freeifaddrs(if_list);
 return true;

 } else {
 LogWarn("fail: errno:%d, %s", errno, strerror(errno));
 return false;
 }
}

}
}