route.c

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/* Poor man's route
 *
 * Supported commands:
 *
 * "print"
 * "add" target ["mask" mask] gw ["metric" metric]
 * "delete" target gw
 *
 * Goals:
 *
 * Flexible, simple
 */
 
#define WIN32_NO_STATUS
#include <stdarg.h>
#include <stdlib.h>
#include <windef.h>
#include <winbase.h>
#include <winreg.h>
#include <stdio.h>
#include <malloc.h>
#define _INC_WINDOWS
#include <winsock2.h>
#include <iphlpapi.h>
#include <ws2tcpip.h>
#include <ip2string.h>
#include <conutils.h>
 
#include "resource.h"
 
#define IPBUF 17
#define IN_ADDR_OF(x) *((struct in_addr *)&(x))
 
#define DELETE_FLAG       0x1
#define PERSISTENT_FLAG   0x2
 
static
BOOL
MatchWildcard(
    _In_ PWSTR Text,
    _In_ PWSTR Pattern)
{
    size_t TextLength, PatternLength, TextIndex = 0, PatternIndex = 0;
    size_t StartIndex = -1, MatchIndex = 0;
 
    if (Pattern == NULL)
        return TRUE;
 
    TextLength = wcslen(Text);
    PatternLength = wcslen(Pattern);
 
    while (TextIndex < TextLength)
    {
        if ((PatternIndex < PatternLength) &&
            ((Pattern[PatternIndex] == L'?') ||
             (towlower(Pattern[PatternIndex]) == towlower(Text[TextIndex]))))
        {
            TextIndex++;
            PatternIndex++;
        }
        else if ((PatternIndex < PatternLength) &&
                 (Pattern[PatternIndex] == L'*'))
        {
            StartIndex = PatternIndex;
            MatchIndex = TextIndex;
            PatternIndex++;
        }
        else if (StartIndex != -1)
        {
            PatternIndex = StartIndex + 1;
            MatchIndex++;
            TextIndex = MatchIndex;
        }
        else
        {
            return FALSE;
        }
    }
 
    while ((PatternIndex < PatternLength) &&
           (Pattern[PatternIndex] == L'*'))
    {
        PatternIndex++;
    }
 
    return (PatternIndex == PatternLength);
}
 
static
VOID
ParsePersistentRouteValue(
    _In_ PWSTR RouteValue,
    _Out_ PWSTR *Destination,
    _Out_ PWSTR *Netmask,
    _Out_ PWSTR *Gateway,
    _Out_ PWSTR *Metric)
{
    PWSTR Ptr, DestPtr;
 
    if (Destination)
        *Destination = NULL;
 
    if (Netmask)
        *Netmask = NULL;
 
    if (Gateway)
        *Gateway = NULL;
 
    if (Metric)
        *Metric = NULL;
 
    DestPtr = RouteValue;
    if (Destination)
        *Destination = DestPtr;
 
    Ptr = wcschr(DestPtr, L',');
    if (Ptr == NULL)
        return;
 
    *Ptr = L'\0';
    Ptr++;
 
    DestPtr = Ptr;
    if (Netmask)
        *Netmask = DestPtr;
 
    Ptr = wcschr(DestPtr, L',');
    if (Ptr == NULL)
        return;
 
    *Ptr = L'\0';
    Ptr++;
 
    DestPtr = Ptr;
    if (Gateway)
        *Gateway = DestPtr;
 
    Ptr = wcschr(DestPtr, L',');
    if (Ptr == NULL)
        return;
 
    *Ptr = L'\0';
    Ptr++;
 
    if (Metric)
        *Metric = Ptr;
}
 
static
BOOL
ParseCmdLine(
    _In_ int argc,
    _In_ WCHAR **argv,
    _In_ int start,
    _Out_ PWSTR *Destination,
    _Out_ PWSTR *Netmask,
    _Out_ PWSTR *Gateway,
    _Out_ PWSTR *Metric)
{
    int i;
 
    if (Destination)
        *Destination = NULL;
 
    if (Netmask)
        *Netmask = NULL;
 
    if (Gateway)
        *Gateway = NULL;
 
    if (Metric)
        *Metric = NULL;
 
    if (argc > start)
    {
        if (Destination)
            *Destination = argv[start];
    }
    else
        return FALSE;
 
    for (i = start + 1; i < argc; i++)
    {
        if (!_wcsicmp(argv[i], L"mask"))
        {
            i++;
            if (i >= argc)
                return FALSE;
            if (Netmask)
                *Netmask = argv[i];
        }
        else if (!_wcsicmp(argv[i], L"metric"))
        {
            i++;
            if (i >= argc) 
                return FALSE;
            if (Metric)
                *Metric = argv[i];
        }
        else
        {
            if (Gateway)
                *Gateway = argv[i];
        }
    }
 
    return TRUE;
}
 
static
VOID
PrintMacAddress(
    _In_ PBYTE Mac,
    _In_ PWSTR Buffer)
{
    swprintf(Buffer, L"%02X %02X %02X %02X %02X %02X ",
        Mac[0], Mac[1], Mac[2], Mac[3], Mac[4],  Mac[5]);
}
 
static
DWORD
PrintPersistentRoutes(
    _In_ PWSTR Filter)
{
    WCHAR szBuffer[64];
    DWORD dwIndex = 0, dwBufferSize;
    BOOL EntriesFound = FALSE;
    HKEY hKey;
    DWORD Error = ERROR_SUCCESS;
    PWSTR Destination, Netmask, Gateway, Metric;
 
    ConResPrintf(StdOut, IDS_SEPARATOR);
    ConResPrintf(StdOut, IDS_PERSISTENT_ROUTES);
 
    Error = RegOpenKeyExW(HKEY_LOCAL_MACHINE,
                          L"SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\PersistentRoutes",
                          0,
                          KEY_READ,
                          &hKey);
    if (Error == ERROR_SUCCESS)
    {
        for (;;)
        {
            dwBufferSize = 64;
 
            Error = RegEnumValueW(hKey,
                                  dwIndex,
                                  szBuffer,
                                  &dwBufferSize,
                                  NULL,
                                  NULL,
                                  NULL,
                                  NULL);
            if (Error != ERROR_SUCCESS)
            {
                if (Error == ERROR_NO_MORE_ITEMS)
                    Error = ERROR_SUCCESS;
 
                break;
            }
 
            ParsePersistentRouteValue(szBuffer,
                                      &Destination,
                                      &Netmask,
                                      &Gateway,
                                      &Metric);
 
            if (MatchWildcard(Destination, Filter))
            {
                if (EntriesFound == FALSE)
                    ConResPrintf(StdOut, IDS_PERSISTENT_HEADER);
                ConResPrintf(StdOut, IDS_PERSISTENT_ENTRY, Destination, Netmask, Gateway, Metric);
                EntriesFound = TRUE;
            }
 
            dwIndex++;
        }
 
        RegCloseKey(hKey);
    }
 
    if (EntriesFound == FALSE)
        ConResPrintf(StdOut, IDS_NONE);
 
    return Error;
}
 
static
VOID
FormatIPv4Address(
    _Out_ PWCHAR pBuffer,
    _In_ PIP_ADAPTER_UNICAST_ADDRESS UnicastAddress,
    _In_ DWORD IfIndex)
{
    PIP_ADAPTER_UNICAST_ADDRESS Ptr = UnicastAddress;
 
    while (Ptr)
    {
        if (Ptr->Address.lpSockaddr->sa_family == AF_INET)
        {
            struct sockaddr_in *si = (struct sockaddr_in *)(Ptr->Address.lpSockaddr);
            RtlIpv4AddressToStringW(&(si->sin_addr), pBuffer);
            return;
        }
 
        Ptr = Ptr->Next;
    }
 
    swprintf(pBuffer, L"%lx", IfIndex);
}
 
static
VOID
GetFirstIPv4AddressFromIndex(
    _Out_ PWSTR pBuffer,
    _In_ PIP_ADAPTER_ADDRESSES pAdapterAddresses,
    _In_ DWORD IfIndex)
{
    PIP_ADAPTER_ADDRESSES Ptr = pAdapterAddresses;
 
    while (Ptr)
    {
        if (Ptr->IfIndex == IfIndex)
        {
            FormatIPv4Address(pBuffer, Ptr->FirstUnicastAddress, Ptr->IfIndex);
            return;
        }
 
        Ptr = Ptr->Next;
    }
 
    swprintf(pBuffer, L"%lx", IfIndex);
}
 
static
int
CompareAdapters(
    _In_ const void *elem1,
    _In_ const void *elem2)
{
    return ((PIP_ADAPTER_ADDRESSES)elem2)->IfIndex - ((PIP_ADAPTER_ADDRESSES)elem1)->IfIndex;
}
 
static
DWORD
PrintActiveRoutes(
    _In_ PWSTR DestinationPattern)
{
    PMIB_IPFORWARDTABLE IpForwardTable = NULL;
    PIP_ADAPTER_ADDRESSES pAdapterAddresses = NULL, Ptr, *pAdapterSortArray = NULL;
    ULONG Size = 0;
    DWORD Error = ERROR_SUCCESS;
    ULONG adaptOutBufLen = 15000;
    WCHAR Destination[IPBUF], Gateway[IPBUF], Netmask[IPBUF], Interface[IPBUF];
    unsigned int i, AdapterCount, AdapterIndex;
    BOOL EntriesFound;
    ULONG Flags = /*GAA_FLAG_SKIP_UNICAST |*/ GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST |
                  GAA_FLAG_SKIP_DNS_SERVER;
 
    /* set required buffer size */
    pAdapterAddresses = (PIP_ADAPTER_ADDRESSES)malloc(adaptOutBufLen);
    if (pAdapterAddresses == NULL)
    {
        Error = ERROR_NOT_ENOUGH_MEMORY;
        goto Error;
    }
 
    if (GetAdaptersAddresses(AF_INET, Flags, NULL, pAdapterAddresses, &adaptOutBufLen) == ERROR_BUFFER_OVERFLOW)
    {
       free(pAdapterAddresses);
       pAdapterAddresses = (PIP_ADAPTER_ADDRESSES)malloc(adaptOutBufLen);
       if (pAdapterAddresses == NULL)
       {
           Error = ERROR_NOT_ENOUGH_MEMORY;
           goto Error;
       }
    }
 
    if ((GetIpForwardTable(NULL, &Size, TRUE)) == ERROR_INSUFFICIENT_BUFFER)
    {
        if (!(IpForwardTable = malloc(Size)))
        {
            Error = ERROR_NOT_ENOUGH_MEMORY;
            goto Error;
        }
    }
 
    if (((Error = GetAdaptersAddresses(AF_INET, Flags, NULL, pAdapterAddresses, &adaptOutBufLen)) == NO_ERROR) &&
        ((Error = GetIpForwardTable(IpForwardTable, &Size, TRUE)) == NO_ERROR))
    {
        ConResPrintf(StdOut, IDS_SEPARATOR);
        ConResPrintf(StdOut, IDS_INTERFACE_LIST);
 
        AdapterCount = 0;
        Ptr = pAdapterAddresses;
        while (Ptr)
        {
            AdapterCount++;
            Ptr = Ptr->Next;
        }
 
        pAdapterSortArray = (PIP_ADAPTER_ADDRESSES*)malloc(AdapterCount * sizeof(PVOID));
        if (pAdapterSortArray == NULL)
        {
            Error = ERROR_NOT_ENOUGH_MEMORY;
            goto Error;
        }
 
        AdapterIndex = 0;
        Ptr = pAdapterAddresses;
        while (Ptr)
        {
            pAdapterSortArray[AdapterIndex] = Ptr;
            AdapterIndex++;
            Ptr = Ptr->Next;
        }
 
        qsort(pAdapterSortArray, AdapterCount, sizeof(PVOID), CompareAdapters);
 
        for (AdapterIndex = 0; AdapterIndex < AdapterCount; AdapterIndex++)
        {
            Ptr = pAdapterSortArray[AdapterIndex];
            if (Ptr->IfType == IF_TYPE_ETHERNET_CSMACD)
            {
                WCHAR PhysicalAddress[20];
                PrintMacAddress(Ptr->PhysicalAddress, PhysicalAddress);
                ConResPrintf(StdOut, IDS_ETHERNET_ENTRY, Ptr->IfIndex, PhysicalAddress, Ptr->Description);
            }
            else
            {
                ConResPrintf(StdOut, IDS_INTERFACE_ENTRY, Ptr->IfIndex, Ptr->Description);
            }
        }
        ConResPrintf(StdOut, IDS_SEPARATOR);
 
        ConResPrintf(StdOut, IDS_IPV4_ROUTE_TABLE);
        ConResPrintf(StdOut, IDS_SEPARATOR);
        ConResPrintf(StdOut, IDS_ACTIVE_ROUTES);
        EntriesFound = FALSE;
        for (i = 0; i < IpForwardTable->dwNumEntries; i++)
        {
            mbstowcs(Destination, inet_ntoa(IN_ADDR_OF(IpForwardTable->table[i].dwForwardDest)), IPBUF);
            mbstowcs(Netmask, inet_ntoa(IN_ADDR_OF(IpForwardTable->table[i].dwForwardMask)), IPBUF);
            mbstowcs(Gateway, inet_ntoa(IN_ADDR_OF(IpForwardTable->table[i].dwForwardNextHop)), IPBUF);
            GetFirstIPv4AddressFromIndex(Interface, pAdapterAddresses, IpForwardTable->table[i].dwForwardIfIndex);
 
            if (MatchWildcard(Destination, DestinationPattern))
            {
                if (EntriesFound == FALSE)
                    ConResPrintf(StdOut, IDS_ROUTES_HEADER);
                ConResPrintf(StdOut, IDS_ROUTES_ENTRY,
                             Destination,
                             Netmask,
                             Gateway,
                             Interface,
                             IpForwardTable->table[i].dwForwardMetric1);
                EntriesFound = TRUE;
            }
        }
 
        if (DestinationPattern == NULL)
        {
            for (i = 0; i < IpForwardTable->dwNumEntries; i++)
            {
                if (IpForwardTable->table[i].dwForwardDest == 0)
                {
                    mbstowcs(Gateway, inet_ntoa(IN_ADDR_OF(IpForwardTable->table[i].dwForwardNextHop)), IPBUF);
                    ConResPrintf(StdOut, IDS_DEFAULT_GATEWAY, Gateway);
                }
            }
        }
        else if (EntriesFound == FALSE)
            ConResPrintf(StdOut, IDS_NONE);
    }
 
Error:
    if (pAdapterSortArray)
        free(pAdapterSortArray);
    if (pAdapterAddresses)
        free(pAdapterAddresses);
    if (IpForwardTable)
        free(IpForwardTable);
 
    if (Error != ERROR_SUCCESS)
        ConResPrintf(StdErr, IDS_ROUTE_ENUM_ERROR);
 
    return Error;
}
 
static
int
PrintRoutes(
    _In_ int argc,
    _In_ WCHAR **argv,
    _In_ int start,
    _In_ int flags)
{
    PWSTR DestinationPattern = NULL;
    DWORD Error;
 
    if (argc > start)
        ParseCmdLine(argc, argv, start, 
                     &DestinationPattern, NULL, NULL, NULL);
 
    Error = PrintActiveRoutes(DestinationPattern);
    if (Error == ERROR_SUCCESS)
        Error = PrintPersistentRoutes(DestinationPattern);
 
    return (Error == ERROR_SUCCESS) ? 0 : 2;
}
 
static
BOOL
ConvertAddCmdLine(
    _Out_ PMIB_IPFORWARDROW RowToAdd,
    _In_ int argc,
    _In_ WCHAR **argv,
    _In_ int start)
{
    int i;
    char addr[16];
 
    if (argc > start)
    {
        wcstombs(addr, argv[start], 16);
        RowToAdd->dwForwardDest = inet_addr(addr);
    }
    else
        return FALSE;
 
    for (i = start + 1; i < argc; i++)
    {
        if (!_wcsicmp(argv[i], L"mask"))
        {
            i++;
            if (i >= argc)
                return FALSE;
            wcstombs(addr, argv[i], 16);
            RowToAdd->dwForwardMask = inet_addr(addr);
        }
        else if (!_wcsicmp(argv[i], L"metric"))
        {
            i++;
            if (i >= argc) 
                return FALSE;
            RowToAdd->dwForwardMetric1 = _wtoi(argv[i]);
        }
        else
        {
            wcstombs(addr, argv[i], 16);
            RowToAdd->dwForwardNextHop = inet_addr(addr);
        }
    }
 
    /* Restrict metric value to range 1 to 9999 */
    if (RowToAdd->dwForwardMetric1 == 0)
        RowToAdd->dwForwardMetric1 = 1;
    else if (RowToAdd->dwForwardMetric1 > 9999)
        RowToAdd->dwForwardMetric1 = 9999;
 
    return TRUE;
}
 
static
DWORD
CreatePersistentIpForwardEntry(
    _In_ PMIB_IPFORWARDROW RowToAdd)
{
    WCHAR Destination[IPBUF], Gateway[IPBUF], Netmask[IPBUF];
    WCHAR ValueName[64];
    HKEY hKey;
    DWORD Error = ERROR_SUCCESS;
 
    mbstowcs(Destination, inet_ntoa(IN_ADDR_OF(RowToAdd->dwForwardDest)), IPBUF);
    mbstowcs(Netmask, inet_ntoa(IN_ADDR_OF(RowToAdd->dwForwardMask)), IPBUF);
    mbstowcs(Gateway, inet_ntoa(IN_ADDR_OF(RowToAdd->dwForwardNextHop)), IPBUF);
 
    swprintf(ValueName, L"%s,%s,%s,%ld", Destination, Netmask, Gateway, RowToAdd->dwForwardMetric1);
 
    Error = RegCreateKeyExW(HKEY_LOCAL_MACHINE,
                            L"SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\PersistentRoutes",
                            0,
                            NULL,
                            REG_OPTION_NON_VOLATILE,
                            KEY_WRITE,
                            NULL,
                            &hKey,
                            NULL);
    if (Error == ERROR_SUCCESS)
    {
        Error = RegSetValueEx(hKey,
                              ValueName,
                              0,
                              REG_SZ,
                              (LPBYTE)L"",
                              sizeof(WCHAR));
 
        RegCloseKey(hKey);
    }
 
    return Error;
}
 
static
DWORD
DeleteCustomRoutes(VOID)
{
    WCHAR Destination[IPBUF], Netmask[IPBUF];
    PMIB_IPFORWARDTABLE IpForwardTable = NULL;
    ULONG Size = 0;
    DWORD Error = ERROR_SUCCESS;
    ULONG i;
 
    if ((GetIpForwardTable(NULL, &Size, TRUE)) == ERROR_INSUFFICIENT_BUFFER)
    {
        if (!(IpForwardTable = malloc(Size)))
        {
            Error = ERROR_NOT_ENOUGH_MEMORY;
            goto done;
        }
    }
 
    Error = GetIpForwardTable(IpForwardTable, &Size, TRUE);
    if (Error != ERROR_SUCCESS)
        goto done;
 
    for (i = 0; i < IpForwardTable->dwNumEntries; i++)
    {
        mbstowcs(Destination, inet_ntoa(IN_ADDR_OF(IpForwardTable->table[i].dwForwardDest)), IPBUF);
        mbstowcs(Netmask, inet_ntoa(IN_ADDR_OF(IpForwardTable->table[i].dwForwardMask)), IPBUF);
 
        if ((wcscmp(Netmask, L"255.255.255.255") != 0) &&
            ((wcscmp(Destination, L"127.0.0.0") != 0) || (wcscmp(Netmask, L"255.0.0.0") != 0)) &&
            ((wcscmp(Destination, L"224.0.0.0") != 0) || (wcscmp(Netmask, L"240.0.0.0") != 0)))
        {
            Error = DeleteIpForwardEntry(&IpForwardTable->table[i]);
            if (Error != ERROR_SUCCESS)
                break;
        }
    }
 
done:
    if (IpForwardTable)
        free(IpForwardTable);
 
    return Error;
}
 
static
int
AddRoute(
    _In_ int argc,
    _In_ WCHAR **argv,
    _In_ int start,
    _In_ int flags)
{
    MIB_IPFORWARDROW RowToAdd = { 0 };
    DWORD Error;
 
    if ((argc <= start) || !ConvertAddCmdLine(&RowToAdd, argc, argv, start))
        return 1;
 
    if (flags & DELETE_FLAG)
        DeleteCustomRoutes();
 
    if (flags & PERSISTENT_FLAG)
        Error = CreatePersistentIpForwardEntry(&RowToAdd);
    else
        Error = CreateIpForwardEntry(&RowToAdd);
    if (Error != ERROR_SUCCESS)
    {
        ConResPrintf(StdErr, IDS_ROUTE_ADD_ERROR);
        return 2;
    }
 
    return 0;
}
 
static
DWORD
DeleteActiveRoutes(
    PWSTR DestinationPattern)
{
    WCHAR Destination[IPBUF], Netmask[IPBUF];
    PMIB_IPFORWARDTABLE IpForwardTable = NULL;
    ULONG Size = 0;
    DWORD Error = ERROR_SUCCESS;
    ULONG i;
 
    if ((GetIpForwardTable(NULL, &Size, TRUE)) == ERROR_INSUFFICIENT_BUFFER)
    {
        if (!(IpForwardTable = malloc(Size)))
        {
            Error = ERROR_NOT_ENOUGH_MEMORY;
            goto done;
        }
    }
 
    Error = GetIpForwardTable(IpForwardTable, &Size, TRUE);
    if (Error != ERROR_SUCCESS)
        goto done;
 
    for (i = 0; i < IpForwardTable->dwNumEntries; i++)
    {
        mbstowcs(Destination, inet_ntoa(IN_ADDR_OF(IpForwardTable->table[i].dwForwardDest)), IPBUF);
        mbstowcs(Netmask, inet_ntoa(IN_ADDR_OF(IpForwardTable->table[i].dwForwardMask)), IPBUF);
 
        if (MatchWildcard(Destination, DestinationPattern))
        {
            Error = DeleteIpForwardEntry(&IpForwardTable->table[i]);
            if (Error != ERROR_SUCCESS)
                break;
        }
    }
 
done:
    if (IpForwardTable)
        free(IpForwardTable);
 
    return Error;
}
 
static
DWORD
DeletePersistentRoutes(
    PWSTR DestinationPattern)
{
 
    WCHAR szBuffer[64];
    DWORD dwIndex = 0, dwBufferSize;
    HKEY hKey;
    DWORD Error = ERROR_SUCCESS;
    PWSTR Destination = NULL;
 
    Error = RegOpenKeyExW(HKEY_LOCAL_MACHINE,
                          L"SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\PersistentRoutes",
                          0,
                          KEY_READ,
                          &hKey);
    if (Error == ERROR_SUCCESS)
    {
        for (;;)
        {
            dwBufferSize = 64;
 
            Error = RegEnumValueW(hKey,
                                  dwIndex,
                                  szBuffer,
                                  &dwBufferSize,
                                  NULL,
                                  NULL,
                                  NULL,
                                  NULL);
            if (Error != ERROR_SUCCESS)
            {
                if (Error == ERROR_NO_MORE_ITEMS)
                    Error = ERROR_SUCCESS;
 
                break;
            }
 
            ParsePersistentRouteValue(szBuffer,
                                      &Destination,
                                      NULL,
                                      NULL,
                                      NULL);
 
            if (MatchWildcard(Destination, DestinationPattern))
            {
                Error = RegDeleteValueW(hKey, szBuffer);
                if (Error != ERROR_SUCCESS)
                    break;
            }
 
            dwIndex++;
        }
 
        RegCloseKey(hKey);
    }
 
    return Error;
}
 
static int
DeleteRoutes(
    _In_ int argc,
    _In_ WCHAR **argv,
    _In_ int start,
    _In_ int flags)
{
    PWSTR DestinationPattern = NULL;
    DWORD Error;
 
    if ((argc <= start) ||
        !ParseCmdLine(argc, argv, start, 
                      &DestinationPattern, NULL, NULL, NULL))
        return 1;
 
    if (flags & DELETE_FLAG)
        DeleteCustomRoutes();
 
    Error = DeleteActiveRoutes(DestinationPattern);
    if (Error == ERROR_SUCCESS)
        Error = DeletePersistentRoutes(DestinationPattern);
 
    if (Error != ERROR_SUCCESS)
    {
        ConResPrintf(StdErr, IDS_ROUTE_DEL_ERROR);
        return 2;
    }
 
    return 0;
}
 
int
wmain(
    _In_ int argc,
    _In_ WCHAR **argv)
{
    int i, flags = 0, ret = 0;
 
    /* Initialize the Console Standard Streams */
    ConInitStdStreams();
 
    for (i = 1; i < argc; i++)
    {
        if (argv[i][0] == L'-' || argv[i][0] == L'/')
        {
            if (!_wcsicmp(&argv[i][1], L"f"))
            {
                flags |= DELETE_FLAG;
            }
            else if (!_wcsicmp(&argv[i][1], L"p"))
            {
                flags |= PERSISTENT_FLAG;
            }
            else
            {
                ret = 1;
                break;
            }
        }
        else
        {
            if (!_wcsicmp(argv[i], L"print"))
                ret = PrintRoutes(argc, argv, i + 1, flags);
            else if (!_wcsicmp(argv[i], L"add"))
                ret = AddRoute(argc, argv, i + 1, flags);
            else if (!_wcsicmp(argv[i], L"delete"))
                ret = DeleteRoutes(argc, argv, i + 1, flags);
            else
                ret = 1;
 
            break;
        }
    }
 
    if (argc == 1)
        ret = 1;
 
    if (ret == 1)
    {
        ConResPrintf(StdErr, IDS_USAGE1);
//        ConResPrintf(StdErr, IDS_USAGE2);
        ConResPrintf(StdErr, IDS_USAGE3);
    }
 
    return (ret == 0) ? 0 : 1;
}