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-rw-r--r--docs/inspircd.conf.example21
-rw-r--r--src/modules/m_dccallow.cpp513
2 files changed, 534 insertions, 0 deletions
diff --git a/docs/inspircd.conf.example b/docs/inspircd.conf.example
index 1d34c369c..3945a2ece 100644
--- a/docs/inspircd.conf.example
+++ b/docs/inspircd.conf.example
@@ -945,6 +945,27 @@
# quitmsg="Throttled" bootwait="10">
#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
+# DCCALLOW module: Adds the /DCCALLOW command
+#<module name="m_dccallow.so">
+#
+#-#-#-#-#-#-#-#-#-#-#- DCCALLOW CONFIGURATION -#-#-#-#-#-#-#-#-#-#-#
+# blockchat - Whether to block DCC CHAT as well as DCC SEND
+# length - Default duration of entries in DCCALLOW list
+# action - Default action to take if no action is specified
+# can be 'block' or 'allow'
+#
+# File configuration:
+# pattern - The glob pattern to match against
+# action - Action to take if a user attempts to send a file
+# that matches this pattern, can be 'block' or 'allow'
+#
+#<dccallow blockchat="yes" length="5m" action="block">
+#<banfile pattern="*.exe" action="block">
+#<banfile pattern="*.txt" action="allow">
+#
+#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
+
+#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
# Deny Channels: Deny Channels from being used by users
#<module name="m_denychans.so">
#
diff --git a/src/modules/m_dccallow.cpp b/src/modules/m_dccallow.cpp
new file mode 100644
index 000000000..033138a98
--- /dev/null
+++ b/src/modules/m_dccallow.cpp
@@ -0,0 +1,513 @@
+ /* m_dccallow - Jamie Penman-Smithson <jamie@silverdream.org> - September 2006 */
+
+using namespace std;
+
+#include <stdio.h>
+#include <vector>
+#include <string.h>
+#include "users.h"
+#include "channels.h"
+#include "modules.h"
+#include "inspircd.h"
+
+/* $ModDesc: Povides support for the /DCCALLOW command */
+
+static ConfigReader *Conf;
+
+class BannedFileList
+{
+ public:
+ std::string filemask;
+ std::string action;
+};
+
+class DCCAllow
+{
+ public:
+ std::string nickname;
+ std::string hostmask;
+ time_t set_on;
+ long length;
+
+ DCCAllow() { }
+
+ DCCAllow(std::string nick, std::string hm, time_t so, long ln) : nickname(nick), hostmask(hm), set_on(so), length(ln) { }
+};
+
+typedef std::vector<userrec *> userlist;
+userlist ul;
+typedef std::vector<DCCAllow> dccallowlist;
+dccallowlist* dl;
+typedef std::vector<BannedFileList> bannedfilelist;
+bannedfilelist bfl;
+
+class cmd_dccallow : public command_t
+{
+ public:
+ cmd_dccallow(InspIRCd* Me) : command_t(Me, "DCCALLOW", 0, 0)
+ {
+ this->source = "m_dccallow.so";
+ syntax = "{[+|-]<nick> <time>}";
+ }
+
+ CmdResult Handle(const char **parameters, int pcnt, userrec *user)
+ {
+ /* syntax: DCCALLOW [+|-]<nick> (<time>) */
+
+ if (!pcnt)
+ {
+ // display current DCCALLOW list
+ DisplayDCCAllowList(user);
+
+ return CMD_SUCCESS;
+ }
+ else if (pcnt > 0)
+ {
+ char action = *parameters[0];
+
+ // if they didn't specify an action, this is probably a command
+ if (action != '+' && action != '-')
+ {
+ if (strcmp(parameters[0], "LIST") == 0 || strcmp(parameters[0], "list") == 0)
+ {
+ // list current DCCALLOW list
+ DisplayDCCAllowList(user);
+ return CMD_SUCCESS;
+ }
+ else if (strcmp(parameters[0], "HELP") == 0 || strcmp(parameters[0], "help") == 0)
+ {
+ // display help
+ DisplayHelp(user);
+ return CMD_SUCCESS;
+ }
+ }
+
+ std::string nick = parameters[0] + 1;
+ userrec *target = ServerInstance->FindNick(nick);
+
+ if (target)
+ {
+ ServerInstance->Log(DEBUG, "m_dccallow.so: got target %s and action %c", target->nick, action);
+
+ if (action == '-')
+ {
+ user->GetExt("dccallow_list", dl);
+ // check if it contains any entries
+ if (dl)
+ {
+ if (dl->size())
+ {
+ for (dccallowlist::iterator i = dl->begin(); i != dl->end(); ++i)
+ {
+ // search through list
+ if (i->nickname == target->nick)
+ {
+ dl->erase(i);
+ user->WriteServ("995 %s %s :Removed %s from your DCCALLOW list", user->nick, user->nick, target->nick);
+ break;
+ }
+ }
+ }
+ }
+ else
+ {
+ DELETE(dl);
+ user->Shrink("dccallow_list");
+
+ // remove from userlist
+ for (userlist::iterator j = ul.begin(); j != ul.end(); ++j)
+ {
+ userrec* u = (userrec*)(*j);
+ if (u->nick == user->nick)
+ {
+ ul.erase(j);
+ break;
+ }
+ }
+ }
+ }
+ else if (action == '+')
+ {
+ // fetch current DCCALLOW list
+ user->GetExt("dccallow_list", dl);
+ // they don't have one, create it
+ if (!dl)
+ {
+ dl = new dccallowlist;
+ user->Extend(std::string("dccallow_list"), dl);
+ // add this user to the userlist
+ ul.push_back(user);
+ }
+ for (dccallowlist::const_iterator k = dl->begin(); k != dl->end(); ++k)
+ {
+ if (k->nickname == target->nick)
+ {
+ user->WriteServ("996 %s %s :%s is already on your DCCALLOW list", user->nick, user->nick, target->nick);
+ return CMD_SUCCESS;
+ }
+ }
+
+ std::string mask = std::string(target->nick)+"!"+std::string(target->ident)+"@"+std::string(target->dhost);
+ const char* default_length = Conf->ReadValue("dccallow", "length", 0).c_str();
+
+ long length;
+ if (pcnt == 1 || ServerInstance->Duration(parameters[1]) < 1)
+ {
+ length = ServerInstance->Duration(default_length);
+ }
+ else if (parameters[1] == 0)
+ {
+ length = 0;
+ }
+ else
+ {
+ length = ServerInstance->Duration(parameters[1]);
+ }
+
+ if (!ServerInstance->IsValidMask(mask.c_str()))
+ {
+ return CMD_FAILURE;
+ }
+
+ dl->push_back(DCCAllow(target->nick, mask, ServerInstance->Time(), length));
+
+ if (length > 0)
+ {
+ user->WriteServ("993 %s %s :Added %s to DCCALLOW list for %d seconds", user->nick, user->nick, target->nick, length);
+ }
+ else
+ {
+ user->WriteServ("994 %s %s :Added %s to DCCALLOW list for this session", user->nick, user->nick, target->nick);
+ }
+
+ return CMD_SUCCESS;
+ }
+ }
+ else
+ {
+ // nick doesn't exist
+ user->WriteServ("401 %s %s :No such nick/channel", user->nick, nick.c_str());
+ return CMD_FAILURE;
+ }
+ }
+ return CMD_SUCCESS;
+ }
+
+ void DisplayHelp(userrec* user)
+ {
+ user->WriteServ("998 %s :DCCALLOW [<+|->nick [time]] [list] [help]", user->nick);
+ user->WriteServ("998 %s :You may allow DCCs from specific users by specifying a", user->nick);
+ user->WriteServ("998 %s :DCC allow for the user you want to receive DCCs from.", user->nick);
+ user->WriteServ("998 %s :For example, to allow the user Brain to send you inspircd.exe", user->nick);
+ user->WriteServ("998 %s :you would type:", user->nick);
+ user->WriteServ("998 %s :/DCCALLOW +Brain", user->nick);
+ user->WriteServ("998 %s :Brain would then be able to send you files. They would have to", user->nick);
+ user->WriteServ("998 %s :resend the file again if the server gave them an error message", user->nick);
+ user->WriteServ("998 %s :before you added them to your DCCALLOW list.", user->nick);
+ user->WriteServ("998 %s :DCCALLOW entries will be temporary by default, if you want to add", user->nick);
+ user->WriteServ("998 %s :them to your DCCALLOW list until you leave IRC, type:", user->nick);
+ user->WriteServ("998 %s :/DCCALLOW +Brain 0", user->nick);
+ user->WriteServ("998 %s :To remove the user from your DCCALLOW list, type:", user->nick);
+ user->WriteServ("998 %s :/DCCALLOW -Brain", user->nick);
+ user->WriteServ("998 %s :To see the users in your DCCALLOW list, type:", user->nick);
+ user->WriteServ("998 %s :/DCCALLOW LIST", user->nick);
+ user->WriteServ("998 %s :NOTE: If the user leaves IRC or changes their nickname", user->nick);
+ user->WriteServ("998 %s : they will be removed from your DCCALLOW list.", user->nick);
+ user->WriteServ("998 %s : your DCCALLOW list will be deleted when you leave IRC.", user->nick);
+ user->WriteServ("999 %s :End of DCCALLOW HELP", user->nick);
+ }
+
+ void DisplayDCCAllowList(userrec* user)
+ {
+ // display current DCCALLOW list
+ user->WriteServ("990 %s :Users on your DCCALLOW list:", user->nick);
+ user->GetExt("dccallow_list", dl);
+
+ if (dl)
+ {
+ for (dccallowlist::const_iterator c = dl->begin(); c != dl->end(); ++c)
+ {
+ user->WriteServ("991 %s %s :%s (%s)", user->nick, user->nick, c->nickname.c_str(), c->hostmask.c_str());
+ }
+ }
+
+ user->WriteServ("992 %s :End of DCCALLOW list", user->nick);
+ }
+
+};
+
+class ModuleDCCAllow : public Module
+{
+ cmd_dccallow* mycommand;
+
+ public:
+ ModuleDCCAllow(InspIRCd* Me)
+ : Module::Module(Me)
+ {
+ Conf = new ConfigReader(ServerInstance);
+ mycommand = new cmd_dccallow(ServerInstance);
+ ServerInstance->AddCommand(mycommand);
+ ReadFileConf();
+ }
+
+ void Implements(char* List)
+ {
+ List[I_OnUserPreMessage] = List[I_OnUserPreNotice] = List[I_OnUserQuit] = List[I_OnUserPreNick] = List[I_OnRehash] = 1;
+ }
+
+ virtual void OnRehash(const std::string &parameter)
+ {
+ delete Conf;
+ Conf = new ConfigReader(ServerInstance);
+ }
+
+ virtual void OnUserQuit(userrec* user, const std::string &reason)
+ {
+ dccallowlist* dl;
+
+ // remove their DCCALLOW list if they have one
+ user->GetExt("dccallow_list", dl);
+ if (dl)
+ {
+ DELETE(dl);
+ user->Shrink("dccallow_list");
+ RemoveFromUserlist(user);
+ }
+
+ // remove them from any DCCALLOW lists
+ // they are currently on
+ RemoveNick(user);
+ }
+
+
+ virtual int OnUserPreNick(userrec* user, const std::string &newnick)
+ {
+ RemoveNick(user);
+ return 0;
+ }
+
+ virtual int OnUserPreMessage(userrec* user, void* dest, int target_type, std::string &text, char status)
+ {
+ return OnUserPreNotice(user, dest, target_type, text, status);
+ }
+
+ virtual int OnUserPreNotice(userrec* user, void* dest, int target_type, std::string &text, char status)
+ {
+ Expire();
+
+ if (target_type == TYPE_USER)
+ {
+ userrec* u = (userrec*)dest;
+
+ if ((text.length()) && (text[0] == '\1'))
+ {
+ // :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)
+ {
+ u->GetExt("dccallow_list", dl);
+
+ if (dl)
+ {
+ if (dl->size())
+ {
+ for (dccallowlist::const_iterator iter = dl->begin(); iter != dl->end(); ++iter)
+ {
+ if (ServerInstance->MatchText(user->GetFullHost(), iter->hostmask))
+ {
+ return 0;
+ }
+ }
+ }
+ }
+
+ // tokenize
+ stringstream ss(text);
+ std::string buf;
+ vector<string> tokens;
+
+ while (ss >> buf)
+ tokens.push_back(buf);
+
+ std::string type = tokens[1];
+ ServerInstance->Log(DEBUG, "m_dccallow.so: got DCC type %s", type.c_str());
+
+ const char* blockchat = Conf->ReadValue("dccallow", "blockchat", 0).c_str();
+ ServerInstance->Log(DEBUG, "m_dccallow.so: got blockchat: %s", blockchat);
+
+ if (type == "SEND")
+ {
+ const char* defaultaction = Conf->ReadValue("dccallow", "action", 0).c_str();
+ std::string filename = tokens[2];
+
+ if (strcmp(defaultaction, "allow") == 0)
+ {
+ return 0;
+ }
+
+ for (unsigned int i = 0; i < bfl.size(); i++)
+ {
+ if (ServerInstance->MatchText(filename, bfl[i].filemask))
+ {
+ if (strcmp(bfl[i].action.c_str(), "allow") == 0)
+ {
+ return 0;
+ }
+ }
+ else
+ {
+ if (strcmp(defaultaction, "allow") == 0)
+ {
+ return 0;
+ }
+ }
+ user->WriteServ("NOTICE %s :The user %s is not accepting DCC SENDs from you. Your file %s was not sent.", user->nick, u->nick, filename.c_str());
+ u->WriteServ("NOTICE %s :%s (%s@%s) attempted to send you a file named %s, which was blocked.", u->nick, user->nick, user->ident, user->dhost, filename.c_str());
+ u->WriteServ("NOTICE %s :If you trust %s and were expecting this, you can type /DCCALLOW HELP for information on the DCCALLOW system.", u->nick, user->nick);
+ }
+ }
+ else if ((type == "CHAT") && (strcmp(blockchat, "yes") == 0))
+ {
+ user->WriteServ("NOTICE %s :The user %s is not accepting DCC CHAT requests from you.", user->nick, u->nick);
+ u->WriteServ("NOTICE %s :%s (%s@%s) attempted to initiate a DCC CHAT session, which was blocked.", u->nick, user->nick, user->ident, user->dhost);
+ u->WriteServ("NOTICE %s :If you trust %s and were expecting this, you can type /DCCALLOW HELP for information on the DCCALLOW system.", u->nick, user->nick);
+ }
+ return 1;
+ }
+ }
+ }
+ return 0;
+ }
+
+ void Expire()
+ {
+ for (userlist::iterator iter = ul.begin(); iter != ul.end(); ++iter)
+ {
+ userrec* u = (userrec*)(*iter);
+ u->GetExt("dccallow_list", dl);
+
+ if (dl)
+ {
+ if (dl->size())
+ {
+ dccallowlist::iterator iter = dl->begin();
+ while (iter != dl->end())
+ {
+ if ((iter->set_on + iter->length) <= ServerInstance->Time())
+ {
+ u->WriteServ("997 %s %s :DCCALLOW entry for %s has expired", u->nick, u->nick, iter->nickname.c_str());
+ iter = dl->erase(iter);
+ }
+ else
+ {
+ ++iter;
+ }
+ }
+ }
+ }
+ else
+ {
+ DELETE(dl);
+ u->Shrink("dccallow_list");
+ RemoveFromUserlist(u);
+ ServerInstance->Log(DEBUG, "m_dccallow.so: UH OH! Couldn't get DCCALLOW list for %s", u->nick);
+ }
+ }
+ }
+
+ void RemoveNick(userrec* user)
+ {
+ /* Iterate through all DCCALLOW lists and remove user */
+ for (userlist::iterator iter = ul.begin(); iter != ul.end(); ++iter)
+ {
+ userrec *u = (userrec*)(*iter);
+ u->GetExt("dccallow_list", dl);
+
+ if (dl)
+ {
+ if (dl->size())
+ {
+ for (dccallowlist::iterator i = dl->begin(); i != dl->end(); ++i)
+ {
+ if (i->nickname == user->nick)
+ {
+
+ u->WriteServ("NOTICE %s :%s left the network or changed their nickname and has been removed from your DCCALLOW list", u->nick, i->nickname.c_str());
+ u->WriteServ("995 %s %s :Removed %s from your DCCALLOW list", u->nick, u->nick, i->nickname.c_str());
+ dl->erase(i);
+ break;
+ }
+ }
+ }
+ }
+ else
+ {
+ DELETE(dl);
+ u->Shrink("dccallow_list");
+ RemoveFromUserlist(u);
+ }
+ }
+ }
+
+ void RemoveFromUserlist(userrec *user)
+ {
+ // remove user from userlist
+ for (userlist::iterator j = ul.begin(); j != ul.end(); ++j)
+ {
+ userrec* u = (userrec*)(*j);
+ if (u->nick == user->nick)
+ {
+ ul.erase(j);
+ break;
+ }
+ }
+ }
+
+ void ReadFileConf()
+ {
+ bfl.clear();
+ for (int i = 0; i < Conf->Enumerate("banfile"); i++)
+ {
+ BannedFileList bf;
+ std::string fileglob = Conf->ReadValue("banfile", "pattern", i);
+ std::string action = Conf->ReadValue("banfile", "action", i);
+ bf.filemask = fileglob;
+ bf.action = action;
+ bfl.push_back(bf);
+ }
+
+ }
+
+ virtual ~ModuleDCCAllow()
+ {
+ }
+
+ virtual Version GetVersion()
+ {
+ return Version(1,0,0,0,VF_COMMON,API_VERSION);
+ }
+};
+
+class ModuleDCCAllowFactory : public ModuleFactory
+{
+ public:
+ ModuleDCCAllowFactory()
+ {
+ }
+
+ ~ModuleDCCAllowFactory()
+ {
+ }
+
+ virtual Module * CreateModule(InspIRCd* Me)
+ {
+ return new ModuleDCCAllow(Me);
+ }
+
+};
+
+extern "C" void * init_module( void )
+{
+ return new ModuleDCCAllowFactory;
+}
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