1
|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2007 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "users.h"
#include "channels.h"
#include "modules.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(const std::string &nick, const std::string &hm, const time_t so, const 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>|HELP|LIST}";
}
CmdResult Handle(const char **parameters, int pcnt, userrec *user)
{
/* syntax: DCCALLOW [+|-]<nick> (<time>) */
if (!pcnt)
{
// display current DCCALLOW list
DisplayDCCAllowList(user);
return CMD_FAILURE;
}
else if (pcnt > 0)
{
char action = *parameters[0];
// if they didn't specify an action, this is probably a command
if (action != '+' && action != '-')
{
if (!strcasecmp(parameters[0], "LIST"))
{
// list current DCCALLOW list
DisplayDCCAllowList(user);
return CMD_FAILURE;
}
else if (!strcasecmp(parameters[0], "HELP"))
{
// display help
DisplayHelp(user);
return CMD_FAILURE;
}
}
std::string nick = parameters[0] + 1;
userrec *target = ServerInstance->FindNick(nick);
if (target)
{
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 == user)
{
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("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_FAILURE;
}
else if (ServerInstance->MatchText(user->GetFullHost(), k->hostmask))
{
user->WriteServ("996 %s %s :You cannot add yourself to your own DCCALLOW list!", user->nick, user->nick);
return CMD_FAILURE;
}
}
std::string mask = std::string(target->nick)+"!"+std::string(target->ident)+"@"+std::string(target->dhost);
std::string default_length = Conf->ReadValue("dccallow", "length", 0);
long length;
if (pcnt < 2)
{
length = ServerInstance->Duration(default_length);
}
else if (!atoi(parameters[1]))
{
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);
}
/* route it. */
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_FAILURE;
}
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(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(userrec* user, const std::string ¶meter)
{
delete Conf;
Conf = new ConfigReader(ServerInstance);
}
virtual void OnUserQuit(userrec* user, const std::string &reason, const std::string &oper_message)
{
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, CUList &exempt_list)
{
return OnUserPreNotice(user, dest, target_type, text, status, exempt_list);
}
virtual int OnUserPreNotice(userrec* user, void* dest, int target_type, std::string &text, char status, CUList &exempt_list)
{
if (!IS_LOCAL(user))
return 0;
if (target_type == TYPE_USER)
{
userrec* u = (userrec*)dest;
/* Always allow a user to dcc themselves (although... why?) */
if (user == u)
return 0;
if ((text.length()) && (text[0] == '\1'))
{
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)
{
u->GetExt("dccallow_list", dl);
if (dl && dl->size())
{
for (dccallowlist::const_iterator iter = dl->begin(); iter != dl->end(); ++iter)
if (ServerInstance->MatchText(user->GetFullHost(), iter->hostmask))
return 0;
}
// tokenize
std::stringstream ss(text);
std::string buf;
std::vector<std::string> tokens;
while (ss >> buf)
tokens.push_back(buf);
irc::string type = tokens[1].c_str();
bool blockchat = Conf->ReadFlag("dccallow", "blockchat", 0);
if (type == "SEND")
{
std::string defaultaction = Conf->ReadValue("dccallow", "action", 0);
std::string filename = tokens[2];
if (defaultaction == "allow")
return 0;
for (unsigned int i = 0; i < bfl.size(); i++)
{
if (ServerInstance->MatchText(filename, bfl[i].filemask))
{
if (bfl[i].action == "allow")
return 0;
}
else
{
if (defaultaction == "allow")
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);
return 1;
}
}
else if ((type == "CHAT") && (blockchat))
{
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
{
RemoveFromUserlist(u);
}
}
}
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
{
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 == user)
{
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(1,1,0,0,VF_COMMON|VF_VENDOR,API_VERSION);
}
};
MODULE_INIT(ModuleDCCAllow)
|
