Deduplicate and move the *MatchesEveryone() functions to core_xline

7 files changed, 105 insertions, 5 deletions

diff --git a/src/coremods/core_xline/cmd_eline.cpp b/src/coremods/core_xline/cmd_eline.cpp
index c92bed25f..26b49894b 100644
--- a/src/coremods/core_xline/cmd_eline.cpp
+++ b/src/coremods/core_xline/cmd_eline.cpp
@@ -54,7 +54,8 @@ CmdResult CommandEline::Handle (const std::vector<std::string>& parameters, User
 			return CMD_FAILURE;
 		}
 
-		if (ServerInstance->HostMatchesEveryone(ih.first+"@"+ih.second,user))
+		InsaneBan::IPHostMatcher matcher;
+		if (InsaneBan::MatchesEveryone(ih.first+"@"+ih.second, matcher, user, "E", "hostmasks"))
 			return CMD_FAILURE;
 
 		unsigned long duration = InspIRCd::Duration(parameters[1]);
diff --git a/src/coremods/core_xline/cmd_gline.cpp b/src/coremods/core_xline/cmd_gline.cpp
index 44b2192b5..3f042c366 100644
--- a/src/coremods/core_xline/cmd_gline.cpp
+++ b/src/coremods/core_xline/cmd_gline.cpp
@@ -55,7 +55,8 @@ CmdResult CommandGline::Handle (const std::vector<std::string>& parameters, User
 			return CMD_FAILURE;
 		}
 
-		if (ServerInstance->HostMatchesEveryone(ih.first+"@"+ih.second,user))
+		InsaneBan::IPHostMatcher matcher;
+		if (InsaneBan::MatchesEveryone(ih.first+"@"+ih.second, matcher, user, "G", "hostmasks"))
 			return CMD_FAILURE;
 
 		else if (target.find('!') != std::string::npos)
diff --git a/src/coremods/core_xline/cmd_kline.cpp b/src/coremods/core_xline/cmd_kline.cpp
index 686f4b9b3..50ab88398 100644
--- a/src/coremods/core_xline/cmd_kline.cpp
+++ b/src/coremods/core_xline/cmd_kline.cpp
@@ -55,7 +55,8 @@ CmdResult CommandKline::Handle (const std::vector<std::string>& parameters, User
             return CMD_FAILURE;
         }
 
-		if (ServerInstance->HostMatchesEveryone(ih.first+"@"+ih.second,user))
+		InsaneBan::IPHostMatcher matcher;
+		if (InsaneBan::MatchesEveryone(ih.first+"@"+ih.second, matcher, user, "K", "hostmasks"))
 			return CMD_FAILURE;
 
 		if (target.find('!') != std::string::npos)
diff --git a/src/coremods/core_xline/cmd_qline.cpp b/src/coremods/core_xline/cmd_qline.cpp
index 24e8581b6..955efeaf0 100644
--- a/src/coremods/core_xline/cmd_qline.cpp
+++ b/src/coremods/core_xline/cmd_qline.cpp
@@ -35,7 +35,8 @@ CmdResult CommandQline::Handle (const std::vector<std::string>& parameters, User
 {
 	if (parameters.size() >= 3)
 	{
-		if (ServerInstance->NickMatchesEveryone(parameters[0],user))
+		NickMatcher matcher;
+		if (InsaneBan::MatchesEveryone(parameters[0], matcher, user, "Q", "nickmasks"))
 			return CMD_FAILURE;
 
 		if (parameters[0].find('@') != std::string::npos || parameters[0].find('!') != std::string::npos || parameters[0].find('.') != std::string::npos)
@@ -82,3 +83,8 @@ CmdResult CommandQline::Handle (const std::vector<std::string>& parameters, User
 
 	return CMD_SUCCESS;
 }
+
+bool CommandQline::NickMatcher::Check(User* user, const std::string& nick) const
+{
+	return InspIRCd::Match(user->nick, nick);
+}
diff --git a/src/coremods/core_xline/cmd_zline.cpp b/src/coremods/core_xline/cmd_zline.cpp
index 5eeebf175..859be1004 100644
--- a/src/coremods/core_xline/cmd_zline.cpp
+++ b/src/coremods/core_xline/cmd_zline.cpp
@@ -59,7 +59,8 @@ CmdResult CommandZline::Handle (const std::vector<std::string>& parameters, User
 			ipaddr++;
 		}
 
-		if (ServerInstance->IPMatchesEveryone(ipaddr,user))
+		IPMatcher matcher;
+		if (InsaneBan::MatchesEveryone(ipaddr, matcher, user, "Z", "ipmasks"))
 			return CMD_FAILURE;
 
 		unsigned long duration = InspIRCd::Duration(parameters[1]);
@@ -100,3 +101,8 @@ CmdResult CommandZline::Handle (const std::vector<std::string>& parameters, User
 
 	return CMD_SUCCESS;
 }
+
+bool CommandZline::IPMatcher::Check(User* user, const std::string& ip) const
+{
+	return InspIRCd::Match(user->GetIPString(), ip, ascii_case_insensitive_map);
+}
diff --git a/src/coremods/core_xline/core_xline.cpp b/src/coremods/core_xline/core_xline.cpp
index dcd85b4f6..94183d829 100644
--- a/src/coremods/core_xline/core_xline.cpp
+++ b/src/coremods/core_xline/core_xline.cpp
@@ -20,6 +20,35 @@
 #include "inspircd.h"
 #include "core_xline.h"
 
+bool InsaneBan::MatchesEveryone(const std::string& mask, MatcherBase& test, User* user, const char* bantype, const char* confkey)
+{
+	ConfigTag* insane = ServerInstance->Config->ConfValue("insane");
+
+	if (insane->getBool(confkey))
+		return false;
+
+	float itrigger = insane->getFloat("trigger", 95.5);
+
+	long matches = test.Run(mask);
+
+	if (!matches)
+		return false;
+
+	float percent = ((float)matches / (float)ServerInstance->Users->clientlist->size()) * 100;
+	if (percent > itrigger)
+	{
+		ServerInstance->SNO->WriteToSnoMask('a', "\2WARNING\2: %s tried to set a %s-line mask of %s, which covers %.2f%% of the network!", user->nick.c_str(), bantype, mask.c_str(), percent);
+		return true;
+	}
+	return false;
+}
+
+bool InsaneBan::IPHostMatcher::Check(User* user, const std::string& mask) const
+{
+	return ((InspIRCd::Match(user->MakeHost(), mask, ascii_case_insensitive_map)) ||
+			(InspIRCd::Match(user->MakeHostIP(), mask, ascii_case_insensitive_map)));
+}
+
 class CoreModXLine : public Module
 {
 	CommandEline cmdeline;
diff --git a/src/coremods/core_xline/core_xline.h b/src/coremods/core_xline/core_xline.h
index c2e171410..6101d79bf 100644
--- a/src/coremods/core_xline/core_xline.h
+++ b/src/coremods/core_xline/core_xline.h
@@ -21,6 +21,50 @@
 
 #include "inspircd.h"
 
+class InsaneBan
+{
+ public:
+	class MatcherBase
+	{
+	 public:
+		virtual long Run(const std::string& mask) = 0;
+	};
+
+	template <typename T>
+	class Matcher : public MatcherBase
+	{
+	 public:
+		long Run(const std::string& mask)
+		{
+			long matches = 0;
+			const T* c = static_cast<T*>(this);
+			const user_hash& users = *ServerInstance->Users->clientlist;
+			for (user_hash::const_iterator i = users.begin(); i != users.end(); ++i)
+			{
+				if (c->Check(i->second, mask))
+					matches++;
+			}
+			return matches;
+		}
+	};
+
+	class IPHostMatcher : public Matcher<IPHostMatcher>
+	{
+	 public:
+		bool Check(User* user, const std::string& mask) const;
+	};
+
+	/** Check if the given mask matches too many users according to the config, send an announcement if yes
+	 * @param mask A mask to match against
+	 * @param test The test that determines if a user matches the mask or not
+	 * @param user A user whose nick will be included in the announcement if one is made
+	 * @param bantype Type of the ban being set, will be used in the announcement if one is made
+	 * @param confkey Name of the config key (inside the insane tag) which if false disables any checking
+	 * @return True if the given mask matches too many users, false if not
+	 */
+	static bool MatchesEveryone(const std::string& mask, MatcherBase& test, User* user, const char* bantype, const char* confkey);
+};
+
 /** Handle /ELINE.
  */
 class CommandEline : public Command
@@ -76,6 +120,12 @@ class CommandKline : public Command
  */
 class CommandQline : public Command
 {
+	class NickMatcher : public InsaneBan::Matcher<NickMatcher>
+	{
+	 public:
+		bool Check(User* user, const std::string& mask) const;
+	};
+
  public:
 	/** Constructor for qline.
 	 */
@@ -94,6 +144,12 @@ class CommandQline : public Command
  */
 class CommandZline : public Command
 {
+	class IPMatcher : public InsaneBan::Matcher<IPMatcher>
+	{
+	 public:
+		bool Check(User* user, const std::string& mask) const;
+	};
+
  public:
 	/** Constructor for zline.
 	 */