diff options
Diffstat (limited to 'src/core/network/network_interface.cpp')
| -rw-r--r-- | src/core/network/network_interface.cpp | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/src/core/network/network_interface.cpp b/src/core/network/network_interface.cpp new file mode 100644 index 000000000..cecc9aa11 --- /dev/null +++ b/src/core/network/network_interface.cpp @@ -0,0 +1,203 @@ +// Copyright 2021 yuzu emulator team +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include <algorithm> +#include <fstream> +#include <sstream> +#include <vector> + +#include "common/bit_cast.h" +#include "common/common_types.h" +#include "common/logging/log.h" +#include "common/settings.h" +#include "common/string_util.h" +#include "core/network/network_interface.h" + +#ifdef _WIN32 +#include <iphlpapi.h> +#else +#include <cerrno> +#include <ifaddrs.h> +#include <net/if.h> +#endif + +namespace Network { + +#ifdef _WIN32 + +std::vector<NetworkInterface> GetAvailableNetworkInterfaces() { + std::vector<IP_ADAPTER_ADDRESSES> adapter_addresses; + DWORD ret = ERROR_BUFFER_OVERFLOW; + DWORD buf_size = 0; + + // retry up to 5 times + for (int i = 0; i < 5 && ret == ERROR_BUFFER_OVERFLOW; i++) { + ret = GetAdaptersAddresses( + AF_INET, GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER | GAA_FLAG_INCLUDE_GATEWAYS, + nullptr, adapter_addresses.data(), &buf_size); + + if (ret == ERROR_BUFFER_OVERFLOW) { + adapter_addresses.resize((buf_size / sizeof(IP_ADAPTER_ADDRESSES)) + 1); + } else { + break; + } + } + + if (ret == NO_ERROR) { + std::vector<NetworkInterface> result; + + for (auto current_address = adapter_addresses.data(); current_address != nullptr; + current_address = current_address->Next) { + if (current_address->FirstUnicastAddress == nullptr || + current_address->FirstUnicastAddress->Address.lpSockaddr == nullptr) { + continue; + } + + if (current_address->OperStatus != IfOperStatusUp) { + continue; + } + + const auto ip_addr = Common::BitCast<struct sockaddr_in>( + *current_address->FirstUnicastAddress->Address.lpSockaddr) + .sin_addr; + + ULONG mask = 0; + if (ConvertLengthToIpv4Mask(current_address->FirstUnicastAddress->OnLinkPrefixLength, + &mask) != NO_ERROR) { + LOG_ERROR(Network, "Failed to convert IPv4 prefix length to subnet mask"); + continue; + } + + struct in_addr gateway = {.S_un{.S_addr{0}}}; + if (current_address->FirstGatewayAddress != nullptr && + current_address->FirstGatewayAddress->Address.lpSockaddr != nullptr) { + gateway = Common::BitCast<struct sockaddr_in>( + *current_address->FirstGatewayAddress->Address.lpSockaddr) + .sin_addr; + } + + result.push_back(NetworkInterface{ + .name{Common::UTF16ToUTF8(std::wstring{current_address->FriendlyName})}, + .ip_address{ip_addr}, + .subnet_mask = in_addr{.S_un{.S_addr{mask}}}, + .gateway = gateway}); + } + + return result; + } else { + LOG_ERROR(Network, "Failed to get network interfaces with GetAdaptersAddresses"); + return {}; + } +} + +#else + +std::vector<NetworkInterface> GetAvailableNetworkInterfaces() { + std::vector<NetworkInterface> result; + + struct ifaddrs* ifaddr = nullptr; + + if (getifaddrs(&ifaddr) != 0) { + LOG_ERROR(Network, "Failed to get network interfaces with getifaddrs: {}", + std::strerror(errno)); + return result; + } + + for (auto ifa = ifaddr; ifa != nullptr; ifa = ifa->ifa_next) { + if (ifa->ifa_addr == nullptr || ifa->ifa_netmask == nullptr) { + continue; + } + + if (ifa->ifa_addr->sa_family != AF_INET) { + continue; + } + + if ((ifa->ifa_flags & IFF_UP) == 0 || (ifa->ifa_flags & IFF_LOOPBACK) != 0) { + continue; + } + + std::uint32_t gateway{0}; + std::ifstream file{"/proc/net/route"}; + if (file.is_open()) { + + // ignore header + file.ignore(std::numeric_limits<std::streamsize>::max(), '\n'); + + bool gateway_found = false; + + for (std::string line; std::getline(file, line);) { + std::istringstream iss{line}; + + std::string iface_name{}; + iss >> iface_name; + if (iface_name != ifa->ifa_name) { + continue; + } + + iss >> std::hex; + + std::uint32_t dest{0}; + iss >> dest; + if (dest != 0) { + // not the default route + continue; + } + + iss >> gateway; + + std::uint16_t flags{0}; + iss >> flags; + + // flag RTF_GATEWAY (defined in <linux/route.h>) + if ((flags & 0x2) == 0) { + continue; + } + + gateway_found = true; + break; + } + + if (!gateway_found) { + gateway = 0; + } + } else { + LOG_ERROR(Network, "Failed to open \"/proc/net/route\""); + } + + result.push_back(NetworkInterface{ + .name{ifa->ifa_name}, + .ip_address{Common::BitCast<struct sockaddr_in>(*ifa->ifa_addr).sin_addr}, + .subnet_mask{Common::BitCast<struct sockaddr_in>(*ifa->ifa_netmask).sin_addr}, + .gateway{in_addr{.s_addr = gateway}}}); + } + + freeifaddrs(ifaddr); + + return result; +} + +#endif + +std::optional<NetworkInterface> GetSelectedNetworkInterface() { + const std::string& selected_network_interface = Settings::values.network_interface.GetValue(); + const auto network_interfaces = Network::GetAvailableNetworkInterfaces(); + if (network_interfaces.size() == 0) { + LOG_ERROR(Network, "GetAvailableNetworkInterfaces returned no interfaces"); + return {}; + } + + const auto res = + std::ranges::find_if(network_interfaces, [&selected_network_interface](const auto& iface) { + return iface.name == selected_network_interface; + }); + + if (res != network_interfaces.end()) { + return *res; + } else { + LOG_ERROR(Network, "Couldn't find selected interface \"{}\"", selected_network_interface); + return {}; + } +} + +} // namespace Network |