diff options
Diffstat (limited to '')
| -rw-r--r-- | src/OSSupport/CMakeLists.txt | 1 | ||||
| -rw-r--r-- | src/OSSupport/Network.h | 3 | ||||
| -rw-r--r-- | src/OSSupport/NetworkInterfaceEnum.cpp | 185 |
3 files changed, 189 insertions, 0 deletions
diff --git a/src/OSSupport/CMakeLists.txt b/src/OSSupport/CMakeLists.txt index 81b37ef0e..0d3c9a63e 100644 --- a/src/OSSupport/CMakeLists.txt +++ b/src/OSSupport/CMakeLists.txt @@ -13,6 +13,7 @@ SET (SRCS HostnameLookup.cpp IPLookup.cpp IsThread.cpp + NetworkInterfaceEnum.cpp NetworkSingleton.cpp Semaphore.cpp ServerHandleImpl.cpp diff --git a/src/OSSupport/Network.h b/src/OSSupport/Network.h index 5dd596223..95a935bbe 100644 --- a/src/OSSupport/Network.h +++ b/src/OSSupport/Network.h @@ -318,6 +318,9 @@ public: If a_Port is 0, the OS is free to assign any port number it likes to the endpoint. Returns the endpoint object that can be interacted with. */ static cUDPEndpointPtr CreateUDPEndpoint(UInt16 a_Port, cUDPEndpoint::cCallbacks & a_Callbacks); + + /** Returns all local IP addresses for network interfaces currently available. */ + static AStringVector EnumLocalIPAddresses(void); }; diff --git a/src/OSSupport/NetworkInterfaceEnum.cpp b/src/OSSupport/NetworkInterfaceEnum.cpp new file mode 100644 index 000000000..c4af1e93c --- /dev/null +++ b/src/OSSupport/NetworkInterfaceEnum.cpp @@ -0,0 +1,185 @@ + +// NetworkInterfaceEnum.cpp + +// Implements the cNetwork::EnumLocalIPAddresses() interface enumeration function + +#include "Globals.h" +#include "Network.h" +#include "event2/util.h" +#ifdef _WIN32 + #include <IPHlpApi.h> + #pragma comment(lib, "IPHLPAPI.lib") +#else // _WIN32 + #include <sys/types.h> + #include <ifaddrs.h> + #include <netinet/in.h> + #include <arpa/inet.h> +#endif // else _WIN32 + + + + + +#ifdef SELF_TEST + +static class cEnumIPAddressTest +{ +public: + cEnumIPAddressTest(void) + { + printf("Enumerating all IP addresses...\n"); + auto IPs = cNetwork::EnumLocalIPAddresses(); + for (auto & ip: IPs) + { + printf(" %s\n", ip.c_str()); + } + printf("Done.\n"); + } +} g_EnumIPAddressTest; + +#endif // SELF_TEST + + + + + +#ifdef _WIN32 + +/** Converts the SOCKET_ADDRESS structure received from the OS into an IP address string. */ +static AString PrintAddress(SOCKET_ADDRESS & a_Addr) +{ + char IP[128]; + switch (a_Addr.lpSockaddr->sa_family) + { + case AF_INET: + { + auto sin = reinterpret_cast<const sockaddr_in *>(a_Addr.lpSockaddr); + evutil_inet_ntop(a_Addr.lpSockaddr->sa_family, &(sin->sin_addr), IP, sizeof(IP)); + break; + } + case AF_INET6: + { + auto sin = reinterpret_cast<const sockaddr_in6 *>(a_Addr.lpSockaddr); + evutil_inet_ntop(a_Addr.lpSockaddr->sa_family, &(sin->sin6_addr), IP, sizeof(IP)); + break; + } + default: + { + IP[0] = 0; + break; + } + } + return IP; +} + +#else // _WIN32 + +static AString PrintAddress(ifaddrs * InterfaceAddress) +{ + switch (InterfaceAddress->ifa_addr->sa_family) + { + case AF_INET: + { // IPv4 + char AddressBuffer[INET_ADDRSTRLEN]; + sockaddr_in InternetSocket; + + std::memcpy(&InternetSocket, InterfaceAddress->ifa_addr, sizeof(InternetSocket)); + inet_ntop(AF_INET, &InternetSocket.sin_addr, AddressBuffer, INET_ADDRSTRLEN); + return AddressBuffer; + } + case AF_INET6: + { // IPv6 + char AddressBuffer[INET6_ADDRSTRLEN]; + sockaddr_in6 InternetSocket; + + std::memcpy(&InternetSocket, InterfaceAddress->ifa_addr, sizeof(InternetSocket)); + inet_ntop(AF_INET6, &InternetSocket.sin6_addr, AddressBuffer, INET6_ADDRSTRLEN); + return AddressBuffer; + } + default: + { + LOG("Unknown address family: %i", InterfaceAddress->ifa_addr->sa_family); + return ""; + } + } +} + +#endif // else _WIN32 + + + + + +AStringVector cNetwork::EnumLocalIPAddresses(void) +{ + AStringVector res; + + #ifdef _WIN32 + + // Query the OS for all adapters' addresses: + char buffer[64 KiB]; // A buffer backing the address list + PIP_ADAPTER_ADDRESSES pAddresses = reinterpret_cast<PIP_ADAPTER_ADDRESSES>(&buffer); + ULONG outBufLen = sizeof(buffer); + DWORD dwRetVal = GetAdaptersAddresses( + AF_UNSPEC, + GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER | GAA_FLAG_SKIP_FRIENDLY_NAME, nullptr, + pAddresses, &outBufLen + ); + if (dwRetVal != ERROR_SUCCESS) + { + LOG("GetAdaptersAddresses() failed: %u", dwRetVal); + return res; + } + + // Enumerate all active adapters + for (auto pCurrAddresses = pAddresses; pCurrAddresses != nullptr; pCurrAddresses = pCurrAddresses->Next) + { + if (pCurrAddresses->OperStatus != IfOperStatusUp) + { + // Adapter not active, skip it: + continue; + } + + // Collect all IP addresses on this adapter: + for (auto pUnicast = pCurrAddresses->FirstUnicastAddress; pUnicast != nullptr; pUnicast = pUnicast->Next) + { + auto Address = PrintAddress(pUnicast->Address); + if (!Address.empty()) + { + res.push_back(Address); + } + } // for pUnicast + } // for pCurrAddresses + + #else // _WIN32 + + struct ifaddrs * ifAddrStruct = nullptr; + getifaddrs(&ifAddrStruct); + + for (auto ifa = ifAddrStruct; ifa != nullptr; ifa = ifa->ifa_next) + { + if (ifa->ifa_addr == nullptr) + { + continue; + } + + auto Address = PrintAddress(ifa); + if (!Address.empty()) + { + res.emplace_back(Address); + } + } + + if (ifAddrStruct != nullptr) + { + freeifaddrs(ifAddrStruct); + } + + #endif // else _WIN32 + + return res; +} + + + + |