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Dynamically load and detect iphlpapi. Makes rpcrt4 work on systems without the DLL and also does not force every app on the system to load the network libraries like before

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svn path=/trunk/; revision=15513
This commit is contained in:
Alex Ionescu 2005-05-26 13:45:08 +00:00
parent acec4be2e4
commit 1883e277ac
1 changed files with 37 additions and 17 deletions
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30
reactos/lib/rpcrt4/rpcrt4_main.c
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@ -319,6 +319,8 @@ static void RPC_UuidGetSystemTime(ULONGLONG *time)
*time += TICKS_15_OCT_1582_TO_1601;
}
typedef DWORD WINAPI (*LPGETADAPTERSINFO)(PIP_ADAPTER_INFO pAdapterInfo, PULONG pOutBufLen);
/* Assume that a hardware address is at least 6 bytes long */
#define ADDRESS_BYTES_NEEDED 6
@ -329,28 +331,46 @@ static RPC_STATUS RPC_UuidGetNodeAddress(BYTE *address)
ULONG buflen = sizeof(IP_ADAPTER_INFO);
PIP_ADAPTER_INFO adapter = HeapAlloc(GetProcessHeap(), 0, buflen);
HANDLE hIpHlpApi;
LPGETADAPTERSINFO pGetAdaptersInfo;
if (GetAdaptersInfo(adapter, &buflen) == ERROR_BUFFER_OVERFLOW) {
hIpHlpApi = LoadLibrary("iphlpapi.dll");
if (hIpHlpApi)
{
pGetAdaptersInfo = (LPGETADAPTERSINFO)GetProcAddress(hIpHlpApi, "GetAdaptersInfo");
if (pGetAdaptersInfo)
{
if (pGetAdaptersInfo(adapter, &buflen) == ERROR_BUFFER_OVERFLOW) {
HeapFree(GetProcessHeap(), 0, adapter);
adapter = HeapAlloc(GetProcessHeap(), 0, buflen);
}
if (GetAdaptersInfo(adapter, &buflen) == NO_ERROR) {
if (pGetAdaptersInfo(adapter, &buflen) == NO_ERROR) {
for (i = 0; i < ADDRESS_BYTES_NEEDED; i++) {
address[i] = adapter->Address[i];
}
}
else
{
goto local;
}
}
/* Free the Library */
FreeLibrary(hIpHlpApi);
goto exit;
}
local:
/* We can't get a hardware address, just use random numbers.
Set the multicast bit to prevent conflicts with real cards. */
else {
for (i = 0; i < ADDRESS_BYTES_NEEDED; i++) {
address[i] = rand() & 0xff;
}
address[0] |= 0x01;
status = RPC_S_UUID_LOCAL_ONLY;
}
exit:
HeapFree(GetProcessHeap(), 0, adapter);
return status;
}