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vlmcsd/msrpc-server.c

299 lines
6.9 KiB
C

#ifndef CONFIG
#define CONFIG "config.h"
#endif // CONFIG
#include CONFIG
#ifdef USE_MSRPC
#if !defined(_WIN32) && !defined(__CYGWIN__)
#error MSRPC is only available with native Windows or Cygwin
#endif
#if _WIN32 && !defined(NO_PRIVATE_IP_DETECT)
#include <winsock2.h>
#endif
#include "msrpc-server.h"
#include "output.h"
#include "kms.h"
#include "helpers.h"
#include "shared_globals.h"
#include "ntservice.h"
#include "endian.h"
#include "types.h"
#if __amd64 || defined(_M_AMD64) // 64-bit
#ifndef _M_AMD64
#define _M_AMD64
#endif // _M_AMD64
#include "KMSServer_s2_x64_mingw_gcc.c"
#else // 32-bit
#include "KMSServer_s2_mingw_gcc.c"
#endif // 32-bit
#if !defined(NO_LIMIT)
#define MAXCALLS MaxTasks
#else // defined(NO_LIMIT)
#define MAXCALLS RPC_C_LISTEN_MAX_CALLS_DEFAULT
#endif
/*
* This is the main run loop for the KMS server
* We actually just setup things (must be after Cygwin fork) and then sleep
*/
int runServer()
{
# if !defined(NO_SOCKETS) && !defined(NO_SIGHUP) && !defined(_WIN32)
// The RPC setup survives a Cygwin exec without problems but no daemonizing
// SIGHUP is currently disabled for Cygwin. So this code should never compile
if (IsRestarted)
{
# ifndef NO_LOG
logger("vlmcsd %s started successfully\n", Version);
# endif // NO_LOG
}
else
# endif // !defined(NO_SOCKETS) && !defined(NO_SIGHUP) && !defined(_WIN32)
{
RPC_STATUS status;
// Endpoint is actually a TCP port for "ncacn_ip_tcp"
status = RpcServerUseProtseqEpA
(
(RPC_CSTR)"ncacn_ip_tcp",
RPC_C_PROTSEQ_MAX_REQS_DEFAULT,
(RPC_CSTR)defaultport,
NULL
);
if (status)
{
printerrorf("Fatal: Cannot bind to port %s: %s\n", defaultport, win_strerror(status));
return status;
}
# ifndef NO_LOG
logger("Listening on port %s\n", defaultport);
# endif // NO_LOG
// Registers the KMSServer interface.
status = RpcServerRegisterIf2
(
KMSServer_v1_0_s_ifspec,
NULL,
NULL,
RPC_IF_ALLOW_CALLBACKS_WITH_NO_AUTH | RPC_IF_AUTOLISTEN,
MAXCALLS,
MAX_RESPONSE_SIZE, // currently set to sizeof(RESPONSE_V6)
NULL
);
if (status)
{
printerrorf("Fatal: Cannot register RPC interface: %s\n", win_strerror(status));
return status;
}
# ifndef NO_LOG
logger("vlmcsd %s started successfully\n", Version);
# endif // NO_LOG
if (IsNTService) ReportServiceStatus(SERVICE_RUNNING, NO_ERROR, 200);
}
// We could run RpcServerListen here but we need something
// that can be signaled from Cygwin. So we just sleep 24h (POSIX sleep, no Windows Sleep),
// wake up for some nanoseconds and sleep again.
while(TRUE) sleep(86400); // Sleep one day
}
/*
* Get's the IP address from an RPC_BINDING_HANDLE. Caller must call RpcStringFreeA to
* release memory allocated in *ipAddress
*/
#ifndef NO_LOG
RPC_STATUS getClientIp(const RPC_BINDING_HANDLE clientBinding, RPC_CSTR *ipAddress)
{
RPC_STATUS result;
RPC_CSTR stringBinding;
RPC_BINDING_HANDLE serverBinding;
// Fix for wine (disabled by default, because vlmcsd runs natively on all platforms where wine runs)
// Feel free to #define SUPPORT_WINE if you really want to run the Windows version with MS RPC (Wine RPC in this case)
#ifdef SUPPORT_WINE
HMODULE h = GetModuleHandleA("kernel32.dll");
if (h)
{
// Since wine simply terminates the thread when RpcBindingServerFromClient is called, we exit with an error
if (GetProcAddress(h, "wine_get_unix_file_name")) return RPC_S_CANNOT_SUPPORT;
}
#endif // SUPPORT_WINE
if ((result = RpcBindingServerFromClient(clientBinding, &serverBinding)) != RPC_S_OK) return result;
if ((result = RpcBindingToStringBindingA(serverBinding, &stringBinding)) != RPC_S_OK)
{
RpcBindingFree(&serverBinding);
return result;
}
result = RpcStringBindingParseA(stringBinding, NULL, NULL, ipAddress, NULL, NULL);
RpcStringFreeA(&stringBinding);
RpcBindingFree(&serverBinding);
return result;
}
#endif // NO_LOG
#ifndef NO_PRIVATE_IP_DETECT
static int_fast8_t IsPrivateIPAddress(char* ipAddress)
{
int family = strchr(ipAddress,'.') ? AF_INET : AF_INET6;
switch(family)
{
case AF_INET:
{
int i;
char* current;
char* next;
uint32_t ip;
for (ip = 0, i = 0, current = ipAddress; i < 4; i++, current = next + 1)
{
ip = (ip << 8) | strtoul(current, &next, 10);
if (*next != '.') break;
}
if
(
(ip & 0xff000000) == 0x7f000000 || // 127.x.x.x localhost
(ip & 0xffff0000) == 0xc0a80000 || // 192.168.x.x private routeable
(ip & 0xffff0000) == 0xa9fe0000 || // 169.254.x.x link local
(ip & 0xff000000) == 0x0a000000 || // 10.x.x.x private routeable
(ip & 0xfff00000) == 0xac100000 // 172.16-31.x.x private routeable
)
{
return TRUE;
}
break;
}
case AF_INET6:
{
if (!strcmp(ipAddress, "::1")) return TRUE;
if (strchr(ipAddress, ':') - ipAddress != 4) break;
int16_t firstWord;
hex2bin((BYTE*)&firstWord, ipAddress, 2);
if ((BE16(firstWord) & 0xe000) != 0x2000) return TRUE;
}
}
return FALSE;
}
#endif // NO_PRIVATE_IP_DETECT
/*
* This is the callback function for the RPC request as defined in KMSServer.idl
* Output from the MIDL compiler has been modified manually to support gcc (and compatible compilers)
* as well as Cygwin and MingW-w64 toolchains.
*/
int ProcessActivationRequest(handle_t IDL_handle, int requestSize, unsigned char *request, int *responseSize, unsigned char **response)
{
RPC_CSTR clientIpAddress;
RPC_STATUS result;
int status = RPC_S_OK;
result = getClientIp(IDL_handle, &clientIpAddress);
# ifndef NO_LOG
logger("RPC connection accepted: %s\n", !result ? (const char*)clientIpAddress : "Unknown IP");
# endif // NO_LOG
# ifndef NO_PRIVATE_IP_DETECT
if (result && (PublicIPProtectionLevel & 2))
{
# ifndef NO_LOG
logger ("Cannot verify that client has a private IP address\n");
# endif
return RPC_S_ACCESS_DENIED;
}
if (!result && (PublicIPProtectionLevel & 2) && !IsPrivateIPAddress((char*)clientIpAddress))
{
# ifndef NO_LOG
logger("Client with public IP address rejected\n");
# endif
RpcStringFreeA(&clientIpAddress);
return RPC_S_ACCESS_DENIED;
}
# endif // NO_PRIVATE_IP_DETECT
// Discard any packet smaller than a v4 request
if (requestSize < (int)sizeof(REQUEST_V4))
{
if (!result) RpcStringFreeA(&clientIpAddress);
return RPC_S_CANNOT_SUPPORT;
}
*response = (uint8_t *)midl_user_allocate(MAX_RESPONSE_SIZE);
switch(LE16(((REQUEST*)(request))->MajorVer))
{
case 4:
*responseSize = CreateResponseV4((REQUEST_V4 *)request, *response, (char*)clientIpAddress);
break;
case 5:
case 6:
*responseSize = CreateResponseV6((REQUEST_V6 *) request, *response, (char*)clientIpAddress);
break;
default:
status = RPC_S_INVALID_ARG;
break;
}
if (!result) RpcStringFreeA(&clientIpAddress);
return status;
}
// Memory allocation function for RPC.
void *__RPC_USER midl_user_allocate(SIZE_T len)
{
return vlmcsd_malloc(len);
}
// Memory deallocation function for RPC.
void __RPC_USER midl_user_free(void __RPC_FAR *ptr)
{
if (ptr) free(ptr);
ptr = NULL;
}
#endif // USE_MSRPC