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network: retrieve subnet mask and gateway info

This commit is contained in:
Sönke Holz 2021-08-16 10:32:25 +02:00
parent 068c66672d
commit 70419f7a17
5 changed files with 137 additions and 24 deletions
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24
src/core/hle/service/nifm/nifm.cpp
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@ -11,6 +11,7 @@
#include "core/hle/service/nifm/nifm.h"
#include "core/hle/service/service.h"
#include "core/network/network.h"
#include "core/network/network_interface.h"
namespace Service::NIFM {
@ -357,16 +358,10 @@ private:
static_assert(sizeof(IpConfigInfo) == sizeof(IpAddressSetting) + sizeof(DnsSetting),
"IpConfigInfo has incorrect size.");
auto ipv4 = Network::GetHostIPv4Address();
if (!ipv4) {
LOG_ERROR(Service_NIFM, "Couldn't get host IPv4 address, defaulting to 0.0.0.0");
ipv4.emplace(Network::IPv4Address{0, 0, 0, 0});
}
const IpConfigInfo ip_config_info{
IpConfigInfo ip_config_info{
.ip_address_setting{
.is_automatic{true},
.current_address{*ipv4},
.current_address{0, 0, 0, 0},
.subnet_mask{255, 255, 255, 0},
.gateway{192, 168, 1, 1},
},
@ -377,6 +372,19 @@ private:
},
};
const auto iface = Network::GetSelectedNetworkInterface();
if (iface) {
ip_config_info.ip_address_setting =
IpAddressSetting{.is_automatic{true},
.current_address{Network::TranslateIPv4(iface->ip_address)},
.subnet_mask{Network::TranslateIPv4(iface->subnet_mask)},
.gateway{Network::TranslateIPv4(iface->gateway)}};
} else {
LOG_ERROR(Service_NIFM,
"Couldn't get host network configuration info, using default values");
}
IPC::ResponseBuilder rb{ctx, 2 + (sizeof(IpConfigInfo) + 3) / sizeof(u32)};
rb.Push(ResultSuccess);
rb.PushRaw<IpConfigInfo>(ip_config_info);

11
src/core/network/network.cpp
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@ -50,11 +50,6 @@ void Finalize() {
WSACleanup();
}
constexpr IPv4Address TranslateIPv4(in_addr addr) {
auto& bytes = addr.S_un.S_un_b;
return IPv4Address{bytes.s_b1, bytes.s_b2, bytes.s_b3, bytes.s_b4};
}
sockaddr TranslateFromSockAddrIn(SockAddrIn input) {
sockaddr_in result;
@ -141,12 +136,6 @@ void Initialize() {}
void Finalize() {}
constexpr IPv4Address TranslateIPv4(in_addr addr) {
const u32 bytes = addr.s_addr;
return IPv4Address{static_cast<u8>(bytes), static_cast<u8>(bytes >> 8),
static_cast<u8>(bytes >> 16), static_cast<u8>(bytes >> 24)};
}
sockaddr TranslateFromSockAddrIn(SockAddrIn input) {
sockaddr_in result;

19
src/core/network/network.h
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@ -11,6 +11,12 @@
#include "common/common_funcs.h"
#include "common/common_types.h"
#ifdef _WIN32
#include <winsock2.h>
#elif YUZU_UNIX
#include <netinet/in.h>
#endif
namespace Network {
class Socket;
@ -93,6 +99,19 @@ public:
~NetworkInstance();
};
#ifdef _WIN32
constexpr IPv4Address TranslateIPv4(in_addr addr) {
auto& bytes = addr.S_un.S_un_b;
return IPv4Address{bytes.s_b1, bytes.s_b2, bytes.s_b3, bytes.s_b4};
}
#elif YUZU_UNIX
constexpr IPv4Address TranslateIPv4(in_addr addr) {
const u32 bytes = addr.s_addr;
return IPv4Address{static_cast<u8>(bytes), static_cast<u8>(bytes >> 8),
static_cast<u8>(bytes >> 16), static_cast<u8>(bytes >> 24)};
}
#endif
/// @brief Returns host's IPv4 address
/// @return human ordered IPv4 address (e.g. 192.168.0.1) as an array
std::optional<IPv4Address> GetHostIPv4Address();

103
src/core/network/network_interface.cpp
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@ -2,11 +2,15 @@
// 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"
@ -29,8 +33,9 @@ std::vector<NetworkInterface> GetAvailableNetworkInterfaces() {
// 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,
nullptr, adapter_addresses.data(), &buf_size);
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);
@ -57,9 +62,26 @@ std::vector<NetworkInterface> GetAvailableNetworkInterfaces() {
*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 = {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}});
.ip_address{ip_addr},
.subnet_mask = in_addr{.S_un{.S_addr{mask}}},
.gateway = gateway});
}
return result;
@ -83,7 +105,7 @@ std::vector<NetworkInterface> GetAvailableNetworkInterfaces() {
}
for (auto ifa = ifaddr; ifa != nullptr; ifa = ifa->ifa_next) {
if (ifa->ifa_addr == nullptr) {
if (ifa->ifa_addr == nullptr || ifa->ifa_netmask == nullptr) {
continue;
}
@ -95,9 +117,59 @@ std::vector<NetworkInterface> GetAvailableNetworkInterfaces() {
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}});
.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);
@ -107,4 +179,25 @@ std::vector<NetworkInterface> GetAvailableNetworkInterfaces() {
#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

4
src/core/network/network_interface.h
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@ -4,6 +4,7 @@
#pragma once
#include <optional>
#include <string>
#include <vector>
@ -18,8 +19,11 @@ namespace Network {
struct NetworkInterface {
std::string name;
struct in_addr ip_address;
struct in_addr subnet_mask;
struct in_addr gateway;
};
std::vector<NetworkInterface> GetAvailableNetworkInterfaces();
std::optional<NetworkInterface> GetSelectedNetworkInterface();
} // namespace Network