From: Remi Gacogne <remi.gacogne@powerdns.com>
Date: Fri, 6 Oct 2023 15:43:11 +0000 (+0200)
Subject: dnsdist: Add a DynBlockRulesGroup:removeRange() binding
X-Git-Tag: dnsdist-1.8.3^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=482274c024801787cac1d50170d6058edfb379b6;p=thirdparty%2Fpdns.git

dnsdist: Add a DynBlockRulesGroup:removeRange() binding

This adds the ability to remove an existing range from the list of
existing included/excluded ranges.

(cherry picked from commit 59a8b3389bb12e127165a9e3fb0f2f28f97adcde)
---

diff --git a/pdns/dnsdist-dynblocks.hh b/pdns/dnsdist-dynblocks.hh
index a26e41530d..c9b1e4a19b 100644
--- a/pdns/dnsdist-dynblocks.hh
+++ b/pdns/dnsdist-dynblocks.hh
@@ -310,6 +310,16 @@ public:
     d_excludedSubnets.addMasks(group, false);
   }
 
+  void removeRange(const Netmask& range)
+  {
+    d_excludedSubnets.deleteMask(range);
+  }
+
+  void removeRange(const NetmaskGroup& group)
+  {
+    d_excludedSubnets.deleteMasks(group);
+  }
+
   void excludeDomain(const DNSName& domain)
   {
     d_excludedDomains.add(domain);
diff --git a/pdns/dnsdist-lua-inspection.cc b/pdns/dnsdist-lua-inspection.cc
index 4cc46ef654..ec7790851c 100644
--- a/pdns/dnsdist-lua-inspection.cc
+++ b/pdns/dnsdist-lua-inspection.cc
@@ -879,6 +879,19 @@ void setupLuaInspection(LuaContext& luaCtx)
         group->includeRange(Netmask(*boost::get<std::string>(&ranges)));
       }
     });
+  luaCtx.registerFunction<void(std::shared_ptr<DynBlockRulesGroup>::*)(boost::variant<std::string, LuaArray<std::string>, NetmaskGroup>)>("removeRange", [](std::shared_ptr<DynBlockRulesGroup>& group, boost::variant<std::string, LuaArray<std::string>, NetmaskGroup> ranges) {
+      if (ranges.type() == typeid(LuaArray<std::string>)) {
+        for (const auto& range : *boost::get<LuaArray<std::string>>(&ranges)) {
+          group->removeRange(Netmask(range.second));
+        }
+      }
+      else if (ranges.type() == typeid(NetmaskGroup)) {
+        group->removeRange(*boost::get<NetmaskGroup>(&ranges));
+      }
+      else {
+        group->removeRange(Netmask(*boost::get<std::string>(&ranges)));
+      }
+    });
   luaCtx.registerFunction<void(std::shared_ptr<DynBlockRulesGroup>::*)(LuaTypeOrArrayOf<std::string>)>("excludeDomains", [](std::shared_ptr<DynBlockRulesGroup>& group, LuaTypeOrArrayOf<std::string> domains) {
       if (domains.type() == typeid(LuaArray<std::string>)) {
         for (const auto& range : *boost::get<LuaArray<std::string>>(&domains)) {
diff --git a/pdns/dnsdistdist/docs/reference/config.rst b/pdns/dnsdistdist/docs/reference/config.rst
index d7c41e7317..5b5d427234 100644
--- a/pdns/dnsdistdist/docs/reference/config.rst
+++ b/pdns/dnsdistdist/docs/reference/config.rst
@@ -1614,6 +1614,14 @@ faster than the existing rules.
 
     :param list netmasks: A :class:`NetmaskGroup` object, or a netmask or list of netmasks as strings, like for example "192.0.2.1/24"
 
+  .. method:: DynBlockRulesGroup:removeRange(netmasks)
+
+    .. versionadded:: 1.6.0
+
+    Remove a previously included or excluded range. The range should be an exact match of the existing entry to remove.
+
+    :param list netmasks: A :class:`NetmaskGroup` object, or a netmask or list of netmasks as strings, like for example "192.0.2.1/24"
+
   .. method:: DynBlockRulesGroup:toString()
 
     Return a string describing the rules and range exclusions of this DynBlockRulesGroup.
diff --git a/pdns/iputils.hh b/pdns/iputils.hh
index 459167e97b..dafc24a546 100644
--- a/pdns/iputils.hh
+++ b/pdns/iputils.hh
@@ -1416,6 +1416,13 @@ public:
     tree.erase(nm);
   }
 
+  void deleteMasks(const NetmaskGroup& group)
+  {
+    for (const auto& entry : group.tree) {
+      deleteMask(entry.first);
+    }
+  }
+
   void deleteMask(const std::string& ip)
   {
     if (!ip.empty())