[IFMON] Implement a basic dump functionality

Author: EricKohl

dll/win32/ifmon/interface.c

@@ -60,6 +60,33 @@ InterfaceShowInterface(
 }
 
 
+static
+DWORD
+WINAPI
+InterfaceDumpFn(
+    _In_ LPCWSTR pwszRouter,
+    _In_ LPWSTR *ppwcArguments,
+    _In_ DWORD dwArgCount,
+    _In_ LPCVOID pvData)
+{
+    DPRINT("InterfaceDumpFn(%S %p %lu %p)\n", pwszRouter, ppwcArguments, dwArgCount, pvData);
+
+    PrintMessageFromModule(hDllInstance, IDS_DUMP_HEADERLINE);
+    PrintMessage(L"# Interface Configuration\n");
+    PrintMessageFromModule(hDllInstance, IDS_DUMP_HEADERLINE);
+    PrintMessage(L"pushd\n");
+    PrintMessage(L"interface\n");
+    PrintMessageFromModule(hDllInstance, IDS_DUMP_NEWLINE);
+
+    PrintMessageFromModule(hDllInstance, IDS_DUMP_NEWLINE);
+    PrintMessage(L"popd\n");
+    PrintMessage(L"# End of Interface Configuration\n");
+    PrintMessageFromModule(hDllInstance, IDS_DUMP_NEWLINE);
+
+    return ERROR_SUCCESS;
+}
+
+
 DWORD
 WINAPI
 InterfaceStart(
@@ -68,7 +95,7 @@ InterfaceStart(
 {
     NS_CONTEXT_ATTRIBUTES ContextAttributes;
 
-    DPRINT1("InterfaceStart()\n");
+    DPRINT("InterfaceStart()\n");
 
     ZeroMemory(&ContextAttributes, sizeof(ContextAttributes));
     ContextAttributes.dwVersion = 1;
@@ -81,6 +108,8 @@ InterfaceStart(
     ContextAttributes.ulNumGroups = sizeof(InterfaceGroups) / sizeof(CMD_GROUP_ENTRY);
     ContextAttributes.pCmdGroups = InterfaceGroups;
 
+    ContextAttributes.pfnDumpFn = InterfaceDumpFn;
+
     RegisterContext(&ContextAttributes);
 
     return ERROR_SUCCESS;
@@ -93,7 +122,7 @@ RegisterInterfaceHelper(VOID)
 {
     NS_HELPER_ATTRIBUTES HelperAttributes;
 
-    DPRINT1("RegisterInterfaceHelper()\n");
+    DPRINT("RegisterInterfaceHelper()\n");
 
     ZeroMemory(&HelperAttributes, sizeof(HelperAttributes));
     HelperAttributes.dwVersion = 1;

dll/win32/ifmon/ip.c

@@ -328,6 +328,124 @@ IpShowDns(
 }
 
 
+static
+DWORD
+WINAPI
+IpDumpFn(
+    _In_ LPCWSTR pwszRouter,
+    _In_ LPWSTR *ppwcArguments,
+    _In_ DWORD dwArgCount,
+    _In_ LPCVOID pvData)
+{
+    PIP_ADAPTER_ADDRESSES pAdapterAddresses = NULL, Ptr;
+    PIP_ADAPTER_UNICAST_ADDRESS pUnicastAddress;
+    PIP_ADAPTER_DNS_SERVER_ADDRESS pDnsServer;
+    WCHAR AddressBuffer[17], MaskBuffer[17];
+    ULONG adaptOutBufLen = 15000;
+    ULONG Flags = GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST;
+    DWORD Error = ERROR_SUCCESS;
+
+    DPRINT("IpDumpFn(%S %p %lu %p)\n", pwszRouter, ppwcArguments, dwArgCount, pvData);
+
+    PrintMessageFromModule(hDllInstance, IDS_DUMP_HEADERLINE);
+    PrintMessage(L"# Interface IP Configuration\n");
+    PrintMessageFromModule(hDllInstance, IDS_DUMP_HEADERLINE);
+    PrintMessage(L"pushd\n");
+    PrintMessage(L"interface ip\n");
+    PrintMessageFromModule(hDllInstance, IDS_DUMP_NEWLINE);
+
+    /* set required buffer size */
+    pAdapterAddresses = (PIP_ADAPTER_ADDRESSES)malloc(adaptOutBufLen);
+    if (pAdapterAddresses == NULL)
+    {
+        Error = ERROR_NOT_ENOUGH_MEMORY;
+        goto done;
+    }
+
+    Error = GetAdaptersAddresses(AF_INET, Flags, NULL, pAdapterAddresses, &adaptOutBufLen);
+    if (Error == ERROR_BUFFER_OVERFLOW)
+    {
+       free(pAdapterAddresses);
+       pAdapterAddresses = (PIP_ADAPTER_ADDRESSES)malloc(adaptOutBufLen);
+       if (pAdapterAddresses == NULL)
+       {
+           Error = ERROR_NOT_ENOUGH_MEMORY;
+           goto done;
+       }
+    }
+
+    Error = GetAdaptersAddresses(AF_INET, Flags, NULL, pAdapterAddresses, &adaptOutBufLen);
+    if (Error != ERROR_SUCCESS)
+        goto done;
+
+    Ptr = pAdapterAddresses;
+    while (Ptr)
+    {
+        if (Ptr->IfType != IF_TYPE_SOFTWARE_LOOPBACK)
+        {
+            PrintMessageFromModule(hDllInstance, IDS_DUMP_NEWLINE);
+            PrintMessageFromModule(hDllInstance, IDS_DUMP_IP_HEADER, Ptr->FriendlyName);
+            PrintMessageFromModule(hDllInstance, IDS_DUMP_NEWLINE);
+
+            if (Ptr->Flags & IP_ADAPTER_DHCP_ENABLED)
+            {
+                PrintMessage(L"set address name=\"%s\" source=dhcp\n",
+                             Ptr->FriendlyName);
+            }
+            else
+            {
+                pUnicastAddress = Ptr->FirstUnicastAddress;
+                while (pUnicastAddress)
+                {
+                    FormatIPv4Address(AddressBuffer, &pUnicastAddress->Address);
+                    wcscpy(MaskBuffer, L"?");
+
+                    PrintMessage(L"set address name=\"%s\" source=static address=%s mask=%s\n",
+                                 Ptr->FriendlyName, AddressBuffer, MaskBuffer);
+
+                    pUnicastAddress = pUnicastAddress->Next;
+                }
+            }
+
+            if (Ptr->Flags & IP_ADAPTER_DHCP_ENABLED)
+            {
+                PrintMessage(L"set dns name=\"%s\" source=dhcp\n",
+                             Ptr->FriendlyName);
+            }
+            else
+            {
+                pDnsServer = Ptr->FirstDnsServerAddress;
+                while (pDnsServer)
+                {
+                    FormatIPv4Address(AddressBuffer, &pDnsServer->Address);
+
+                    PrintMessage(L"set dns name=\"%s\" source=%s address=%s\n",
+                                 Ptr->FriendlyName);
+
+                    pDnsServer = pDnsServer->Next;
+                }
+
+            }
+
+            PrintMessageFromModule(hDllInstance, IDS_DUMP_NEWLINE);
+        }
+
+        Ptr = Ptr->Next;
+    }
+
+done:
+    if (pAdapterAddresses)
+        free(pAdapterAddresses);
+
+    PrintMessageFromModule(hDllInstance, IDS_DUMP_NEWLINE);
+    PrintMessage(L"popd\n");
+    PrintMessage(L"# End of Interface IP Configuration\n");
+    PrintMessageFromModule(hDllInstance, IDS_DUMP_NEWLINE);
+
+    return ERROR_SUCCESS;
+}
+
+
 static
 DWORD
 WINAPI
@@ -350,6 +468,8 @@ IpStart(
     ContextAttributes.ulNumGroups = sizeof(IpGroups) / sizeof(CMD_GROUP_ENTRY);
     ContextAttributes.pCmdGroups = IpGroups;
 
+    ContextAttributes.pfnDumpFn = IpDumpFn;
+
     RegisterContext(&ContextAttributes);
 
     return ERROR_SUCCESS;

dll/win32/ifmon/lang/en-US.rc

@@ -25,4 +25,13 @@ BEGIN
     IDS_SUBNETMASKS      "    Subnet Masks:                         %s\n"
 
     IDS_EMPTYLINE        "                                          %s\n"
+
+
+
+    IDS_DUMP_NEWLINE     "\n"
+    IDS_DUMP_HEADERLINE  "# ----------------------------------\n"
+
+    IDS_DUMP_IP_HEADER   "# Interface IP Configuration for ""%s""\n"
+
+
 END

dll/win32/ifmon/resource.h

@@ -22,3 +22,7 @@
 #define IDS_SUBNETMASKS      308
 
 #define IDS_EMPTYLINE        400
+
+#define IDS_DUMP_NEWLINE     800
+#define IDS_DUMP_HEADERLINE  801
+#define IDS_DUMP_IP_HEADER   802