130 lines
2.6 KiB
C++
130 lines
2.6 KiB
C++
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// NetworkInterfaceEnum.cpp
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// Implements the cNetwork::EnumLocalIPAddresses() interface enumeration function
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#include "Globals.h"
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#include "Network.h"
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#include "event2/util.h"
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#ifdef _WIN32
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#include <IPHlpApi.h>
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#pragma comment(lib, "IPHLPAPI.lib")
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#else // _WIN32
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#endif // else _WIN32
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#ifdef SELF_TEST
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static class cEnumIPAddressTest
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{
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public:
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cEnumIPAddressTest(void)
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{
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printf("Enumerating all IP addresses...\n");
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auto IPs = cNetwork::EnumLocalIPAddresses();
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for (auto & ip: IPs)
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{
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printf(" %s\n", ip.c_str());
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}
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printf("done.\n");
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}
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} g_EnumIPAddressTest;
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#endif // SELF_TEST
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#ifdef _WIN32
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/** Converts the SOCKET_ADDRESS structure received from the OS into an IP address string. */
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static AString PrintAddress(SOCKET_ADDRESS & a_Addr)
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{
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char IP[128];
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switch (a_Addr.lpSockaddr->sa_family)
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{
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case AF_INET:
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{
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auto sin = reinterpret_cast<const sockaddr_in *>(a_Addr.lpSockaddr);
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evutil_inet_ntop(a_Addr.lpSockaddr->sa_family, &(sin->sin_addr), IP, sizeof(IP));
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break;
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}
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case AF_INET6:
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{
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auto sin = reinterpret_cast<const sockaddr_in6 *>(a_Addr.lpSockaddr);
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evutil_inet_ntop(a_Addr.lpSockaddr->sa_family, &(sin->sin6_addr), IP, sizeof(IP));
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break;
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}
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default:
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{
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IP[0] = 0;
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break;
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}
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}
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return AString(IP);
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}
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#endif // _WIN32
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AStringVector cNetwork::EnumLocalIPAddresses(void)
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{
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AStringVector res;
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#ifdef _WIN32
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// Query the OS for all adapters' addresses:
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char buffer[64 KiB]; // A buffer backing the address list
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PIP_ADAPTER_ADDRESSES pAddresses = reinterpret_cast<PIP_ADAPTER_ADDRESSES>(&buffer);
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ULONG outBufLen = sizeof(buffer);
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DWORD dwRetVal = GetAdaptersAddresses(
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AF_UNSPEC,
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GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER | GAA_FLAG_SKIP_FRIENDLY_NAME, nullptr,
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pAddresses, &outBufLen
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);
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if (dwRetVal != ERROR_SUCCESS)
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{
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LOG("GetAdaptersAddresses() failed: %u", dwRetVal);
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return res;
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}
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// Enumerate all active adapters
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for (auto pCurrAddresses = pAddresses; pCurrAddresses != nullptr; pCurrAddresses = pCurrAddresses->Next)
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{
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if (pCurrAddresses->OperStatus != 1)
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{
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// Adapter not active, skip it:
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continue;
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}
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// Collect all IP addresses on this adapter:
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for (auto pUnicast = pCurrAddresses->FirstUnicastAddress; pUnicast != nullptr; pUnicast = pUnicast->Next)
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{
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auto Address = PrintAddress(pUnicast->Address);
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if (!Address.empty())
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{
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res.push_back(Address);
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}
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} // for pUnicast
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} // for pCurrAddresses
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#else // _WIN32
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// TODO: Enumerate network interfaces on Linux
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#endif // else _WIN32
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return res;
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}
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