X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_dccallow.cpp;h=007f0efef0b084d5bd5231ad72359a8e3697c224;hb=d848034590bc402277da975b7efdbc78ce1722fc;hp=edf9d012f72277171a5803713d0341c5dd666279;hpb=bcdc3b0bb0ba957a9e99cd6db7f1242a9e587400;p=user%2Fhenk%2Fcode%2Finspircd.git

diff --git a/src/modules/m_dccallow.cpp b/src/modules/m_dccallow.cpp
index edf9d012f..007f0efef 100644
--- a/src/modules/m_dccallow.cpp
+++ b/src/modules/m_dccallow.cpp
@@ -1,13 +1,19 @@
 /*
  * InspIRCd -- Internet Relay Chat Daemon
  *
- *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
- *   Copyright (C) 2008 John Brooks <john.brooks@dereferenced.net>
- *   Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
- *   Copyright (C) 2006-2008 Craig Edwards <craigedwards@brainbox.cc>
+ *   Copyright (C) 2019 Matt Schatz <genius3000@g3k.solutions>
+ *   Copyright (C) 2018 linuxdaemon <linuxdaemon.irc@gmail.com>
+ *   Copyright (C) 2016 Adam <Adam@anope.org>
+ *   Copyright (C) 2013, 2017-2020 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2012-2016 Attila Molnar <attilamolnar@hush.com>
+ *   Copyright (C) 2012, 2014, 2019 Robby <robby@chatbelgie.be>
+ *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2009 Matt Smith <dz@inspircd.org>
+ *   Copyright (C) 2008, 2010 Craig Edwards <brain@inspircd.org>
+ *   Copyright (C) 2008 John Brooks <special@inspircd.org>
  *   Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
- *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
- *   Copyright (C) 2006 Jamie ??? <???@???>
+ *   Copyright (C) 2007-2008 Dennis Friis <peavey@inspircd.org>
+ *   Copyright (C) 2006 jamie <jamie@e03df62e-2008-0410-955e-edbf42e46eb7>
  *
  * This file is part of InspIRCd.  InspIRCd is free software: you can
  * redistribute it and/or modify it under the terms of the GNU General Public
@@ -25,9 +31,27 @@
 
 #include "inspircd.h"
 
+enum
+{
+	// From ircd-ratbox.
+	RPL_HELPSTART = 704,
+	RPL_HELPTXT = 705,
+	RPL_ENDOFHELP = 706,
+
+	// InspIRCd-specific?
+	RPL_DCCALLOWSTART = 990,
+	RPL_DCCALLOWLIST = 991,
+	RPL_DCCALLOWEND = 992,
+	RPL_DCCALLOWTIMED = 993,
+	RPL_DCCALLOWPERMANENT = 994,
+	RPL_DCCALLOWREMOVED = 995,
+	ERR_DCCALLOWINVALID = 996,
+	RPL_DCCALLOWEXPIRED = 997,
+	ERR_UNKNOWNDCCALLOWCMD = 998
+};
+
 static const char* const helptext[] =
 {
-	"DCCALLOW [(+|-)<nick> [<time>]]|[LIST|HELP]",
 	"You may allow DCCs from specific users by specifying a",
 	"DCC allow for the user you want to receive DCCs from.",
 	"For example, to allow the user Brain to send you inspircd.exe",
@@ -36,7 +60,7 @@ static const char* const helptext[] =
 	"Brain would then be able to send you files. They would have to",
 	"resend the file again if the server gave them an error message",
 	"before you added them to your DCCALLOW list.",
-	"DCCALLOW entries will be temporary by default, if you want to add",
+	"DCCALLOW entries will be temporary. If you want to add",
 	"them to your DCCALLOW list until you leave IRC, type:",
 	"/DCCALLOW +Brain 0",
 	"To remove the user from your DCCALLOW list, type:",
@@ -45,7 +69,7 @@ static const char* const helptext[] =
 	"/DCCALLOW LIST",
 	"NOTE: If the user leaves IRC or changes their nickname",
 	"  they will be removed from your DCCALLOW list.",
-	"  your DCCALLOW list will be deleted when you leave IRC."
+	"  Your DCCALLOW list will be deleted when you leave IRC."
 };
 
 class BannedFileList
@@ -61,11 +85,17 @@ class DCCAllow
 	std::string nickname;
 	std::string hostmask;
 	time_t set_on;
-	long length;
+	unsigned long length;
 
 	DCCAllow() { }
 
-	DCCAllow(const std::string &nick, const std::string &hm, const time_t so, const long ln) : nickname(nick), hostmask(hm), set_on(so), length(ln) { }
+	DCCAllow(const std::string& nick, const std::string& hm, time_t so, unsigned long ln)
+		: nickname(nick)
+		, hostmask(hm)
+		, set_on(so)
+		, length(ln)
+	{
+	}
 };
 
 typedef std::vector<User *> userlist;
@@ -74,25 +104,97 @@ typedef std::vector<DCCAllow> dccallowlist;
 dccallowlist* dl;
 typedef std::vector<BannedFileList> bannedfilelist;
 bannedfilelist bfl;
-typedef SimpleExtItem<dccallowlist> DCCAllowExt;
 
-class CommandDccallow : public Command
+class DCCAllowExt : public SimpleExtItem<dccallowlist>
 {
-	DCCAllowExt& ext;
-
  public:
 	unsigned int maxentries;
+
+	DCCAllowExt(Module* Creator)
+		: SimpleExtItem<dccallowlist>("dccallow", ExtensionItem::EXT_USER, Creator)
+	{
+	}
+
+	void FromInternal(Extensible* container, const std::string& value) CXX11_OVERRIDE
+	{
+		LocalUser* user = IS_LOCAL(static_cast<User*>(container));
+		if (!user)
+			return;
+
+		// Remove the old list and create a new one.
+		unset(user);
+		dccallowlist* list = new dccallowlist();
+
+		irc::spacesepstream ts(value);
+		while (!ts.StreamEnd())
+		{
+			// Check we have space for another entry.
+			if (list->size() >= maxentries)
+			{
+				ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Oversized DCC allow list received for %s: %s",
+					user->uuid.c_str(), value.c_str());
+				delete list;
+				return;
+			}
+
+			// Extract the fields.
+			DCCAllow dccallow;
+			if (!ts.GetToken(dccallow.nickname) ||
+				!ts.GetToken(dccallow.hostmask) ||
+				!ts.GetNumericToken(dccallow.set_on) ||
+				!ts.GetNumericToken(dccallow.length))
+			{
+				ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Malformed DCC allow list received for %s: %s",
+					user->uuid.c_str(), value.c_str());
+				delete list;
+				return;
+			}
+
+			// Store the DCC allow entry.
+			list->push_back(dccallow);
+		}
+
+		// The value was well formed.
+		set(user, list);
+	}
+
+	std::string ToInternal(const Extensible* container, void* item) const CXX11_OVERRIDE
+	{
+		dccallowlist* list = static_cast<dccallowlist*>(item);
+		std::string buf;
+		for (dccallowlist::const_iterator iter = list->begin(); iter != list->end(); ++iter)
+		{
+			if (iter != list->begin())
+				buf.push_back(' ');
+
+			buf.append(iter->nickname);
+			buf.push_back(' ');
+			buf.append(iter->hostmask);
+			buf.push_back(' ');
+			buf.append(ConvToStr(iter->set_on));
+			buf.push_back(' ');
+			buf.append(ConvToStr(iter->length));
+		}
+		return buf;
+	}
+};
+
+class CommandDccallow : public Command
+{
+ public:
+	DCCAllowExt& ext;
+	unsigned long defaultlength;
 	CommandDccallow(Module* parent, DCCAllowExt& Ext)
 		: Command(parent, "DCCALLOW", 0)
 		, ext(Ext)
 	{
 		syntax = "[(+|-)<nick> [<time>]]|[LIST|HELP]";
-		/* XXX we need to fix this so it can work with translation stuff (i.e. move +- into a seperate param */
+		/* XXX we need to fix this so it can work with translation stuff (i.e. move +- into a separate param */
 	}
 
-	CmdResult Handle(const std::vector<std::string> &parameters, User *user)
+	CmdResult Handle(User* user, const Params& parameters) CXX11_OVERRIDE
 	{
-		/* syntax: DCCALLOW [+|-]<nick> (<time>) */
+		/* syntax: DCCALLOW [(+|-)<nick> [<time>]]|[LIST|HELP] */
 		if (!parameters.size())
 		{
 			// display current DCCALLOW list
@@ -106,13 +208,13 @@ class CommandDccallow : public Command
 			// if they didn't specify an action, this is probably a command
 			if (action != '+' && action != '-')
 			{
-				if (!strcasecmp(parameters[0].c_str(), "LIST"))
+				if (irc::equals(parameters[0], "LIST"))
 				{
 					// list current DCCALLOW list
 					DisplayDCCAllowList(user);
 					return CMD_FAILURE;
 				}
-				else if (!strcasecmp(parameters[0].c_str(), "HELP"))
+				else if (irc::equals(parameters[0], "HELP"))
 				{
 					// display help
 					DisplayHelp(user);
@@ -120,7 +222,7 @@ class CommandDccallow : public Command
 				}
 				else
 				{
-					user->WriteNumeric(998, "DCCALLOW command not understood. For help on DCCALLOW, type /DCCALLOW HELP");
+					user->WriteNumeric(ERR_UNKNOWNDCCALLOWCMD, "DCCALLOW command not understood. For help on DCCALLOW, type /DCCALLOW HELP");
 					return CMD_FAILURE;
 				}
 			}
@@ -143,7 +245,7 @@ class CommandDccallow : public Command
 							if (i->nickname == target->nick)
 							{
 								dl->erase(i);
-								user->WriteNumeric(995, user->nick, InspIRCd::Format("Removed %s from your DCCALLOW list", target->nick.c_str()));
+								user->WriteNumeric(RPL_DCCALLOWREMOVED, user->nick, InspIRCd::Format("Removed %s from your DCCALLOW list", target->nick.c_str()));
 								break;
 							}
 						}
@@ -153,7 +255,7 @@ class CommandDccallow : public Command
 				{
 					if (target == user)
 					{
-						user->WriteNumeric(996, user->nick, "You cannot add yourself to your own DCCALLOW list!");
+						user->WriteNumeric(ERR_DCCALLOWINVALID, user->nick, "You cannot add yourself to your own DCCALLOW list!");
 						return CMD_FAILURE;
 					}
 
@@ -166,9 +268,9 @@ class CommandDccallow : public Command
 						ul.push_back(user);
 					}
 
-					if (dl->size() >= maxentries)
+					if (dl->size() >= ext.maxentries)
 					{
-						user->WriteNumeric(996, user->nick, "Too many nicks on DCCALLOW list");
+						user->WriteNumeric(ERR_DCCALLOWINVALID, user->nick, "Too many nicks on DCCALLOW list");
 						return CMD_FAILURE;
 					}
 
@@ -176,26 +278,29 @@ class CommandDccallow : public Command
 					{
 						if (k->nickname == target->nick)
 						{
-							user->WriteNumeric(996, user->nick, InspIRCd::Format("%s is already on your DCCALLOW list", target->nick.c_str()));
+							user->WriteNumeric(ERR_DCCALLOWINVALID, user->nick, InspIRCd::Format("%s is already on your DCCALLOW list", target->nick.c_str()));
 							return CMD_FAILURE;
 						}
 					}
 
-					std::string mask = target->nick+"!"+target->ident+"@"+target->dhost;
-					std::string default_length = ServerInstance->Config->ConfValue("dccallow")->getString("length");
-
+					std::string mask = target->nick+"!"+target->ident+"@"+target->GetDisplayedHost();
 					unsigned long length;
 					if (parameters.size() < 2)
 					{
-						length = InspIRCd::Duration(default_length);
+						length = defaultlength;
 					}
-					else if (!atoi(parameters[1].c_str()))
+					else if (!InspIRCd::IsValidDuration(parameters[1]))
 					{
-						length = 0;
+						user->WriteNumeric(ERR_DCCALLOWINVALID, user->nick, InspIRCd::Format("%s is not a valid DCCALLOW duration", parameters[1].c_str()));
+						return CMD_FAILURE;
 					}
 					else
 					{
-						length = InspIRCd::Duration(parameters[1]);
+						if (!InspIRCd::Duration(parameters[1], length))
+						{
+							user->WriteNotice("*** Invalid duration for DCC allow");
+							return CMD_FAILURE;
+						}
 					}
 
 					if (!InspIRCd::IsValidMask(mask))
@@ -207,11 +312,11 @@ class CommandDccallow : public Command
 
 					if (length > 0)
 					{
-						user->WriteNumeric(993, user->nick, InspIRCd::Format("Added %s to DCCALLOW list for %ld seconds", target->nick.c_str(), length));
+						user->WriteNumeric(RPL_DCCALLOWTIMED, user->nick, InspIRCd::Format("Added %s to DCCALLOW list for %s", target->nick.c_str(), InspIRCd::DurationString(length).c_str()));
 					}
 					else
 					{
-						user->WriteNumeric(994, user->nick, InspIRCd::Format("Added %s to DCCALLOW list for this session", target->nick.c_str()));
+						user->WriteNumeric(RPL_DCCALLOWPERMANENT, user->nick, InspIRCd::Format("Added %s to DCCALLOW list for this session", target->nick.c_str()));
 					}
 
 					/* route it. */
@@ -228,16 +333,17 @@ class CommandDccallow : public Command
 		return CMD_FAILURE;
 	}
 
-	RouteDescriptor GetRouting(User* user, const std::vector<std::string>& parameters)
+	RouteDescriptor GetRouting(User* user, const Params& parameters) CXX11_OVERRIDE
 	{
 		return ROUTE_BROADCAST;
 	}
 
 	void DisplayHelp(User* user)
 	{
+		user->WriteNumeric(RPL_HELPSTART, "*", "DCCALLOW [(+|-)<nick> [<time>]]|[LIST|HELP]");
 		for (size_t i = 0; i < sizeof(helptext)/sizeof(helptext[0]); i++)
-			user->WriteNumeric(998, helptext[i]);
-		user->WriteNumeric(999, "End of DCCALLOW HELP");
+			user->WriteNumeric(RPL_HELPTXT, "*", helptext[i]);
+		user->WriteNumeric(RPL_ENDOFHELP, "*", "End of DCCALLOW HELP");
 
 		LocalUser* localuser = IS_LOCAL(user);
 		if (localuser)
@@ -246,19 +352,19 @@ class CommandDccallow : public Command
 
 	void DisplayDCCAllowList(User* user)
 	{
-		 // display current DCCALLOW list
-		user->WriteNumeric(990, "Users on your DCCALLOW list:");
+		// display current DCCALLOW list
+		user->WriteNumeric(RPL_DCCALLOWSTART, "Users on your DCCALLOW list:");
 
 		dl = ext.get(user);
 		if (dl)
 		{
 			for (dccallowlist::const_iterator c = dl->begin(); c != dl->end(); ++c)
 			{
-				user->WriteNumeric(991, user->nick, InspIRCd::Format("%s (%s)", c->nickname.c_str(), c->hostmask.c_str()));
+				user->WriteNumeric(RPL_DCCALLOWLIST, user->nick, InspIRCd::Format("%s (%s)", c->nickname.c_str(), c->hostmask.c_str()));
 			}
 		}
 
-		user->WriteNumeric(992, "End of DCCALLOW list");
+		user->WriteNumeric(RPL_DCCALLOWEND, "End of DCCALLOW list");
 	}
 
 };
@@ -267,11 +373,14 @@ class ModuleDCCAllow : public Module
 {
 	DCCAllowExt ext;
 	CommandDccallow cmd;
+	bool blockchat;
+	std::string defaultaction;
 
  public:
 	ModuleDCCAllow()
-		: ext("dccallow", ExtensionItem::EXT_USER, this)
+		: ext(this)
 		, cmd(this, ext)
+		, blockchat(false)
 	{
 	}
 
@@ -293,27 +402,29 @@ class ModuleDCCAllow : public Module
 		RemoveNick(user);
 	}
 
-	ModResult OnUserPreMessage(User* user, void* dest, int target_type, std::string& text, char status, CUList& exempt_list, MessageType msgtype) CXX11_OVERRIDE
+	ModResult OnUserPreMessage(User* user, const MessageTarget& target, MessageDetails& details) CXX11_OVERRIDE
 	{
 		if (!IS_LOCAL(user))
 			return MOD_RES_PASSTHRU;
 
-		if (target_type == TYPE_USER)
+		if (target.type == MessageTarget::TYPE_USER)
 		{
-			User* u = (User*)dest;
+			User* u = target.Get<User>();
 
 			/* Always allow a user to dcc themselves (although... why?) */
 			if (user == u)
 				return MOD_RES_PASSTHRU;
 
-			if ((text.length()) && (text[0] == '\1'))
+			std::string ctcpname;
+			std::string ctcpbody;
+			if (details.IsCTCP(ctcpname, ctcpbody))
 			{
 				Expire();
 
 				// :jamie!jamie@test-D4457903BA652E0F.silverdream.org PRIVMSG eimaj :DCC SEND m_dnsbl.cpp 3232235786 52650 9676
 				// :jamie!jamie@test-D4457903BA652E0F.silverdream.org PRIVMSG eimaj :VERSION
 
-				if (strncmp(text.c_str(), "\1DCC ", 5) == 0)
+				if (irc::equals(ctcpname, "DCC") && !ctcpbody.empty())
 				{
 					dl = ext.get(u);
 					if (dl && dl->size())
@@ -323,21 +434,17 @@ class ModuleDCCAllow : public Module
 								return MOD_RES_PASSTHRU;
 					}
 
-					std::string buf = text.substr(5);
-					size_t s = buf.find(' ');
+					size_t s = ctcpbody.find(' ');
 					if (s == std::string::npos)
 						return MOD_RES_PASSTHRU;
 
-					const std::string type = buf.substr(0, s);
+					const std::string type = ctcpbody.substr(0, s);
 
-					ConfigTag* conftag = ServerInstance->Config->ConfValue("dccallow");
-					bool blockchat = conftag->getBool("blockchat");
-
-					if (stdalgo::string::equalsci(type, "SEND"))
+					if (irc::equals(type, "SEND"))
 					{
 						size_t first;
 
-						buf = buf.substr(s + 1);
+						std::string buf = ctcpbody.substr(s + 1);
 
 						if (!buf.empty() && buf[0] == '"')
 						{
@@ -358,7 +465,6 @@ class ModuleDCCAllow : public Module
 						if (s == std::string::npos)
 							return MOD_RES_PASSTHRU;
 
-						std::string defaultaction = conftag->getString("action");
 						std::string filename = buf.substr(first, s);
 
 						bool found = false;
@@ -367,7 +473,7 @@ class ModuleDCCAllow : public Module
 							if (InspIRCd::Match(filename, bfl[i].filemask, ascii_case_insensitive_map))
 							{
 								/* We have a matching badfile entry, override whatever the default action is */
-								if (bfl[i].action == "allow")
+								if (stdalgo::string::equalsci(bfl[i].action, "allow"))
 									return MOD_RES_PASSTHRU;
 								else
 								{
@@ -382,14 +488,14 @@ class ModuleDCCAllow : public Module
 							return MOD_RES_PASSTHRU;
 
 						user->WriteNotice("The user " + u->nick + " is not accepting DCC SENDs from you. Your file " + filename + " was not sent.");
-						u->WriteNotice(user->nick + " (" + user->ident + "@" + user->dhost + ") attempted to send you a file named " + filename + ", which was blocked.");
+						u->WriteNotice(user->nick + " (" + user->ident + "@" + user->GetDisplayedHost() + ") attempted to send you a file named " + filename + ", which was blocked.");
 						u->WriteNotice("If you trust " + user->nick + " and were expecting this, you can type /DCCALLOW HELP for information on the DCCALLOW system.");
 						return MOD_RES_DENY;
 					}
-					else if ((blockchat) && (stdalgo::string::equalsci(type, "CHAT")))
+					else if (blockchat && irc::equals(type, "CHAT"))
 					{
 						user->WriteNotice("The user " + u->nick + " is not accepting DCC CHAT requests from you.");
-						u->WriteNotice(user->nick + " (" + user->ident + "@" + user->dhost + ") attempted to initiate a DCC CHAT session, which was blocked.");
+						u->WriteNotice(user->nick + " (" + user->ident + "@" + user->GetDisplayedHost() + ") attempted to initiate a DCC CHAT session, which was blocked.");
 						u->WriteNotice("If you trust " + user->nick + " and were expecting this, you can type /DCCALLOW HELP for information on the DCCALLOW system.");
 						return MOD_RES_DENY;
 					}
@@ -412,9 +518,10 @@ class ModuleDCCAllow : public Module
 					dccallowlist::iterator iter2 = dl->begin();
 					while (iter2 != dl->end())
 					{
-						if (iter2->length != 0 && (iter2->set_on + iter2->length) <= ServerInstance->Time())
+						time_t expires = iter2->set_on + iter2->length;
+						if (iter2->length != 0 && expires <= ServerInstance->Time())
 						{
-							u->WriteNumeric(997, u->nick, InspIRCd::Format("DCCALLOW entry for %s has expired", iter2->nickname.c_str()));
+							u->WriteNumeric(RPL_DCCALLOWEXPIRED, u->nick, InspIRCd::Format("DCCALLOW entry for %s has expired", iter2->nickname.c_str()));
 							iter2 = dl->erase(iter2);
 						}
 						else
@@ -449,7 +556,7 @@ class ModuleDCCAllow : public Module
 						{
 
 							u->WriteNotice(i->nickname + " left the network or changed their nickname and has been removed from your DCCALLOW list");
-							u->WriteNumeric(995, u->nick, InspIRCd::Format("Removed %s from your DCCALLOW list", i->nickname.c_str()));
+							u->WriteNumeric(RPL_DCCALLOWREMOVED, u->nick, InspIRCd::Format("Removed %s from your DCCALLOW list", i->nickname.c_str()));
 							dl->erase(i);
 							break;
 						}
@@ -480,23 +587,27 @@ class ModuleDCCAllow : public Module
 
 	void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
 	{
-		ConfigTag* tag = ServerInstance->Config->ConfValue("dccallow");
-		cmd.maxentries = tag->getInt("maxentries", 20);
-
-		bfl.clear();
+		bannedfilelist newbfl;
 		ConfigTagList tags = ServerInstance->Config->ConfTags("banfile");
 		for (ConfigIter i = tags.first; i != tags.second; ++i)
 		{
 			BannedFileList bf;
 			bf.filemask = i->second->getString("pattern");
 			bf.action = i->second->getString("action");
-			bfl.push_back(bf);
+			newbfl.push_back(bf);
 		}
+		bfl.swap(newbfl);
+
+		ConfigTag* tag = ServerInstance->Config->ConfValue("dccallow");
+		cmd.ext.maxentries = tag->getUInt("maxentries", 20);
+		cmd.defaultlength = tag->getDuration("length", 0);
+		blockchat = tag->getBool("blockchat");
+		defaultaction = tag->getString("action");
 	}
 
 	Version GetVersion() CXX11_OVERRIDE
 	{
-		return Version("Provides support for the /DCCALLOW command", VF_COMMON | VF_VENDOR);
+		return Version("Allows the server administrator to configure what files are allowed to be sent via DCC SEND and allows users to configure who can send them DCC CHAT and DCC SEND requests.", VF_COMMON | VF_VENDOR);
 	}
 };