1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
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
|
