intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 79 insertions, 0 deletions

diff --git a/util/network/interface.cpp b/util/network/interface.cpp
new file mode 100644
index 0000000000..256776c6d3
--- /dev/null
+++ b/util/network/interface.cpp
@@ -0,0 +1,79 @@
+#include "interface.h"
+
+#if defined(_unix_)
+    #include <ifaddrs.h>
+#endif
+
+#ifdef _win_
+    #include <iphlpapi.h>
+    #pragma comment(lib, "Iphlpapi.lib")
+#endif
+
+namespace NAddr {
+    static bool IsInetAddress(sockaddr* addr) {
+        return (addr != nullptr) && ((addr->sa_family == AF_INET) || (addr->sa_family == AF_INET6));
+    }
+
+    TNetworkInterfaceList GetNetworkInterfaces() {
+        TNetworkInterfaceList result;
+
+#ifdef _win_
+        TVector<char> buf;
+        buf.resize(1000000);
+        PIP_ADAPTER_ADDRESSES adapterBuf = (PIP_ADAPTER_ADDRESSES)&buf[0];
+        ULONG bufSize = buf.ysize();
+
+        if (GetAdaptersAddresses(AF_UNSPEC, 0, nullptr, adapterBuf, &bufSize) == ERROR_SUCCESS) {
+            for (PIP_ADAPTER_ADDRESSES ptr = adapterBuf; ptr != 0; ptr = ptr->Next) {
+                // The check below makes code working on Vista+
+                if ((ptr->Flags & (IP_ADAPTER_IPV4_ENABLED | IP_ADAPTER_IPV6_ENABLED)) == 0) {
+                    continue;
+                }
+                if (ptr->IfType == IF_TYPE_TUNNEL) {
+                    // ignore tunnels
+                    continue;
+                }
+                if (ptr->OperStatus != IfOperStatusUp) {
+                    // ignore disable adapters
+                    continue;
+                }
+
+                for (IP_ADAPTER_UNICAST_ADDRESS* addr = ptr->FirstUnicastAddress; addr != 0; addr = addr->Next) {
+                    sockaddr* a = (sockaddr*)addr->Address.lpSockaddr;
+                    if (IsInetAddress(a)) {
+                        TNetworkInterface networkInterface;
+
+                        // Not very efficient but straightforward
+                        for (size_t i = 0; ptr->FriendlyName[i] != 0; i++) {
+                            CHAR w = ptr->FriendlyName[i];
+                            char c = (w < 0x80) ? char(w) : '?';
+                            networkInterface.Name.append(1, c);
+                        }
+
+                        networkInterface.Address = new TOpaqueAddr(a);
+                        result.push_back(networkInterface);
+                    }
+                }
+            }
+        }
+#else
+        ifaddrs* ifap;
+        if (getifaddrs(&ifap) != -1) {
+            for (ifaddrs* ifa = ifap; ifa != nullptr; ifa = ifa->ifa_next) {
+                if (IsInetAddress(ifa->ifa_addr)) {
+                    TNetworkInterface interface;
+                    interface.Name = ifa->ifa_name;
+                    interface.Address = new TOpaqueAddr(ifa->ifa_addr);
+                    if (IsInetAddress(ifa->ifa_netmask)) {
+                        interface.Mask = new TOpaqueAddr(ifa->ifa_netmask);
+                    }
+                    result.push_back(interface);
+                }
+            }
+            freeifaddrs(ifap);
+        }
+#endif
+
+        return result;
+    }
+}