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// 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
#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 AString(IP);
}
#endif // _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
// TODO: Enumerate network interfaces on Linux
#endif // else _WIN32
return res;
}
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