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414 lines
12 KiB
C++
414 lines
12 KiB
C++
// https://learn.microsoft.com/en-us/previous-versions/windows/desktop/ics/c-adding-an-application-rule-edge-traversal
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/********************************************************************
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Copyright (C) Microsoft. All Rights Reserved.
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Abstract:
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This C++ file includes sample code that adds a firewall rule with
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EdgeTraversalOptions (one of the EdgeTraversalOptions values).
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********************************************************************/
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#include "pch.h"
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#include <windows.h>
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#include <stdio.h>
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#include <netfw.h>
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#include <strsafe.h>
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#pragma comment(lib, "ole32.lib")
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#pragma comment(lib, "oleaut32.lib")
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#define STRING_BUFFER_SIZE 500
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// Forward declarations
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HRESULT WFCOMInitialize(INetFwPolicy2** ppNetFwPolicy2);
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void WFCOMCleanup(INetFwPolicy2* pNetFwPolicy2);
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HRESULT RemoveFirewallRule(
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__in INetFwPolicy2* pNetFwPolicy2,
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__in LPWSTR exeName);
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HRESULT AddFirewallRuleWithEdgeTraversal(__in INetFwPolicy2* pNetFwPolicy2,
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__in bool in,
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__in LPWSTR exeName,
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__in LPWSTR exeFile);
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bool AddFirewallRule(bool add, LPWSTR exeName, LPWSTR exeFile)
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{
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bool result = false;
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HRESULT hrComInit = S_OK;
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HRESULT hr = S_OK;
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INetFwPolicy2* pNetFwPolicy2 = NULL;
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// Initialize COM.
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hrComInit = CoInitializeEx(
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0,
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COINIT_APARTMENTTHREADED
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);
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// Ignore RPC_E_CHANGED_MODE; this just means that COM has already been
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// initialized with a different mode. Since we don't care what the mode is,
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// we'll just use the existing mode.
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if (hrComInit != RPC_E_CHANGED_MODE)
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{
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if (FAILED(hrComInit))
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{
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WcaLog(LOGMSG_STANDARD, "CoInitializeEx failed: 0x%08lx\n", hrComInit);
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goto Cleanup;
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}
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}
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// Retrieve INetFwPolicy2
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hr = WFCOMInitialize(&pNetFwPolicy2);
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if (FAILED(hr))
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{
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goto Cleanup;
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}
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if (add) {
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// Add firewall rule with EdgeTraversalOption=DeferApp (Windows7+) if available
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// else add with Edge=True (Vista and Server 2008).
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hr = AddFirewallRuleWithEdgeTraversal(pNetFwPolicy2, true, exeName, exeFile);
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hr = AddFirewallRuleWithEdgeTraversal(pNetFwPolicy2, false, exeName, exeFile);
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}
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else {
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hr = RemoveFirewallRule(pNetFwPolicy2, exeName);
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}
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result = SUCCEEDED(hr);
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Cleanup:
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// Release INetFwPolicy2
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WFCOMCleanup(pNetFwPolicy2);
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// Uninitialize COM.
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if (SUCCEEDED(hrComInit))
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{
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CoUninitialize();
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}
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return result;
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}
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BSTR MakeRuleName(__in LPWSTR exeName)
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{
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WCHAR pwszTemp[STRING_BUFFER_SIZE] = L"";
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HRESULT hr = StringCchPrintfW(pwszTemp, STRING_BUFFER_SIZE, L"%ls Service", exeName);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed to compose a resource identifier string: 0x%08lx\n", hr);
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return NULL;
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}
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return SysAllocString(pwszTemp);
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}
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HRESULT RemoveFirewallRule(
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__in INetFwPolicy2* pNetFwPolicy2,
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__in LPWSTR exeName)
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{
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HRESULT hr = S_OK;
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INetFwRules* pNetFwRules = NULL;
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WCHAR pwszTemp[STRING_BUFFER_SIZE] = L"";
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BSTR RuleName = NULL;
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RuleName = MakeRuleName(exeName);
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if (NULL == RuleName)
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{
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WcaLog(LOGMSG_STANDARD, "\nERROR: Insufficient memory\n");
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goto Cleanup;
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}
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hr = pNetFwPolicy2->get_Rules(&pNetFwRules);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed to retrieve firewall rules collection : 0x%08lx\n", hr);
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goto Cleanup;
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}
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// We need to "Remove()" twice, because both "in" and "out" rules are added?
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// There's no remarks for this case https://learn.microsoft.com/en-us/windows/win32/api/netfw/nf-netfw-inetfwrules-remove
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hr = pNetFwRules->Remove(RuleName);
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hr = pNetFwRules->Remove(RuleName);
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if (FAILED(hr)) {
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WcaLog(LOGMSG_STANDARD, "Failed to remove firewall rule \"%ls\" : 0x%08lx\n", exeName, hr);
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}
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else {
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WcaLog(LOGMSG_STANDARD, "Firewall rule \"%ls\" is removed\n", exeName);
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}
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Cleanup:
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SysFreeString(RuleName);
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if (pNetFwRules != NULL)
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{
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pNetFwRules->Release();
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}
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return hr;
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}
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// Add firewall rule with EdgeTraversalOption=DeferApp (Windows7+) if available
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// else add with Edge=True (Vista and Server 2008).
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HRESULT AddFirewallRuleWithEdgeTraversal(
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__in INetFwPolicy2* pNetFwPolicy2,
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__in bool in,
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__in LPWSTR exeName,
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__in LPWSTR exeFile)
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{
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HRESULT hr = S_OK;
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INetFwRules* pNetFwRules = NULL;
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INetFwRule* pNetFwRule = NULL;
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INetFwRule2* pNetFwRule2 = NULL;
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WCHAR pwszTemp[STRING_BUFFER_SIZE] = L"";
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BSTR RuleName = NULL;
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BSTR RuleGroupName = NULL;
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BSTR RuleDescription = NULL;
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BSTR RuleAppPath = NULL;
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long CurrentProfilesBitMask = 0;
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// For localization purposes, the rule name, description, and group can be
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// provided as indirect strings. These indirect strings can be defined in an rc file.
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// Examples of the indirect string definitions in the rc file -
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// 127 "EdgeTraversalOptions Sample Application"
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// 128 "Allow inbound TCP traffic to application EdgeTraversalOptions.exe"
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// 129 "Allow EdgeTraversalOptions.exe to receive inbound traffic for TCP protocol
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// from remote machines located within your network as well as from
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// the Internet (i.e from outside of your Edge device like Firewall or NAT"
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// Examples of using indirect strings -
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// hr = StringCchPrintfW(pwszTemp, STRING_BUFFER_SIZE, L"@EdgeTraversalOptions.exe,-128");
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RuleName = MakeRuleName(exeName);
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if (NULL == RuleName)
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{
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WcaLog(LOGMSG_STANDARD, "\nERROR: Insufficient memory\n");
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goto Cleanup;
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}
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// Examples of using indirect strings -
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// hr = StringCchPrintfW(pwszTemp, STRING_BUFFER_SIZE, L"@EdgeTraversalOptions.exe,-127");
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hr = StringCchPrintfW(pwszTemp, STRING_BUFFER_SIZE, exeName);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed to compose a resource identifier string: 0x%08lx\n", hr);
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goto Cleanup;
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}
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RuleGroupName = SysAllocString(pwszTemp); // Used for grouping together multiple rules
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if (NULL == RuleGroupName)
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{
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WcaLog(LOGMSG_STANDARD, "\nERROR: Insufficient memory\n");
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goto Cleanup;
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}
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// Examples of using indirect strings -
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// hr = StringCchPrintfW(pwszTemp, STRING_BUFFER_SIZE, L"@EdgeTraversalOptions.exe,-129");
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hr = StringCchPrintfW(pwszTemp, STRING_BUFFER_SIZE, L"Allow %ls to receive \
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inbound traffic from remote machines located within your network as well as \
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from the Internet", exeName);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed to compose a resource identifier string: 0x%08lx\n", hr);
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goto Cleanup;
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}
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RuleDescription = SysAllocString(pwszTemp);
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if (NULL == RuleDescription)
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{
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WcaLog(LOGMSG_STANDARD, "\nERROR: Insufficient memory\n");
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goto Cleanup;
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}
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RuleAppPath = SysAllocString(exeFile);
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if (NULL == RuleAppPath)
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{
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WcaLog(LOGMSG_STANDARD, "\nERROR: Insufficient memory\n");
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goto Cleanup;
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}
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hr = pNetFwPolicy2->get_Rules(&pNetFwRules);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed to retrieve firewall rules collection : 0x%08lx\n", hr);
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goto Cleanup;
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}
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hr = CoCreateInstance(
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__uuidof(NetFwRule), //CLSID of the class whose object is to be created
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NULL,
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CLSCTX_INPROC_SERVER,
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__uuidof(INetFwRule), // Identifier of the Interface used for communicating with the object
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(void**)&pNetFwRule);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "CoCreateInstance for INetFwRule failed: 0x%08lx\n", hr);
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goto Cleanup;
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}
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hr = pNetFwRule->put_Name(RuleName);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed INetFwRule::put_Name failed with error: 0x %x.\n", hr);
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goto Cleanup;
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}
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hr = pNetFwRule->put_Grouping(RuleGroupName);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed INetFwRule::put_Grouping failed with error: 0x %x.\n", hr);
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goto Cleanup;
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}
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hr = pNetFwRule->put_Description(RuleDescription);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed INetFwRule::put_Description failed with error: 0x %x.\n", hr);
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goto Cleanup;
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}
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// If you want the rule to avoid public, you can refer to
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// https://learn.microsoft.com/en-us/previous-versions/windows/desktop/ics/c-adding-an-outbound-rule
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CurrentProfilesBitMask = NET_FW_PROFILE2_ALL;
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hr = pNetFwRule->put_Direction(in ? NET_FW_RULE_DIR_IN : NET_FW_RULE_DIR_OUT);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed INetFwRule::put_Direction failed with error: 0x %x.\n", hr);
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goto Cleanup;
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}
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hr = pNetFwRule->put_Action(NET_FW_ACTION_ALLOW);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed INetFwRule::put_Action failed with error: 0x %x.\n", hr);
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goto Cleanup;
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}
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hr = pNetFwRule->put_ApplicationName(RuleAppPath);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed INetFwRule::put_ApplicationName failed with error: 0x %x.\n", hr);
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goto Cleanup;
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}
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//hr = pNetFwRule->put_Protocol(6); // TCP
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//if (FAILED(hr))
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//{
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// WcaLog(LOGMSG_STANDARD, "Failed INetFwRule::put_Protocol failed with error: 0x %x.\n", hr);
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// goto Cleanup;
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//}
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hr = pNetFwRule->put_Profiles(CurrentProfilesBitMask);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed INetFwRule::put_Profiles failed with error: 0x %x.\n", hr);
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goto Cleanup;
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}
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hr = pNetFwRule->put_Enabled(VARIANT_TRUE);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed INetFwRule::put_Enabled failed with error: 0x %x.\n", hr);
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goto Cleanup;
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}
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if (in) {
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// Check if INetFwRule2 interface is available (i.e Windows7+)
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// If supported, then use EdgeTraversalOptions
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// Else use the EdgeTraversal boolean flag.
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if (SUCCEEDED(pNetFwRule->QueryInterface(__uuidof(INetFwRule2), (void**)&pNetFwRule2)))
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{
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hr = pNetFwRule2->put_EdgeTraversalOptions(NET_FW_EDGE_TRAVERSAL_TYPE_DEFER_TO_APP);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed INetFwRule::put_EdgeTraversalOptions failed with error: 0x %x.\n", hr);
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goto Cleanup;
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}
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}
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else
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{
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hr = pNetFwRule->put_EdgeTraversal(VARIANT_TRUE);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed INetFwRule::put_EdgeTraversal failed with error: 0x %x.\n", hr);
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goto Cleanup;
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}
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}
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}
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hr = pNetFwRules->Add(pNetFwRule);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "Failed to add firewall rule to the firewall rules collection : 0x%08lx\n", hr);
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goto Cleanup;
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}
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WcaLog(LOGMSG_STANDARD, "Successfully added firewall rule !\n");
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Cleanup:
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SysFreeString(RuleName);
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SysFreeString(RuleGroupName);
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SysFreeString(RuleDescription);
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SysFreeString(RuleAppPath);
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if (pNetFwRule2 != NULL)
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{
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pNetFwRule2->Release();
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}
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if (pNetFwRule != NULL)
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{
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pNetFwRule->Release();
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}
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if (pNetFwRules != NULL)
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{
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pNetFwRules->Release();
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}
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return hr;
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}
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// Instantiate INetFwPolicy2
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HRESULT WFCOMInitialize(INetFwPolicy2** ppNetFwPolicy2)
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{
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HRESULT hr = S_OK;
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hr = CoCreateInstance(
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__uuidof(NetFwPolicy2),
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NULL,
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CLSCTX_INPROC_SERVER,
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__uuidof(INetFwPolicy2),
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(void**)ppNetFwPolicy2);
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if (FAILED(hr))
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{
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WcaLog(LOGMSG_STANDARD, "CoCreateInstance for INetFwPolicy2 failed: 0x%08lx\n", hr);
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goto Cleanup;
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}
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Cleanup:
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return hr;
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}
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// Release INetFwPolicy2
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void WFCOMCleanup(INetFwPolicy2* pNetFwPolicy2)
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{
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// Release the INetFwPolicy2 object (Vista+)
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if (pNetFwPolicy2 != NULL)
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{
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pNetFwPolicy2->Release();
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}
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}
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