/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2011 InspIRCd Development Team
* See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "command_parse.h"
int InspIRCd::PassCompare(Extensible* ex, const std::string &data, const std::string &input, const std::string &hashtype)
{
ModResult res;
FIRST_MOD_RESULT(OnPassCompare, res, (ex, data, input, hashtype));
/* Module matched */
if (res == MOD_RES_ALLOW)
return 0;
/* Module explicitly didnt match */
if (res == MOD_RES_DENY)
return 1;
/* We dont handle any hash types except for plaintext - Thanks tra26 */
if (hashtype != "" && hashtype != "plaintext")
/* See below. 1 because they dont match */
return 1;
return (data != input); // this seems back to front, but returns 0 if they *match*, 1 else
}
/* LoopCall is used to call a command classes handler repeatedly based on the contents of a comma seperated list.
* There are two overriden versions of this method, one of which takes two potential lists and the other takes one.
* We need a version which takes two potential lists for JOIN, because a JOIN may contain two lists of items at once,
* the channel names and their keys as follows:
* JOIN #chan1,#chan2,#chan3 key1,,key3
* Therefore, we need to deal with both lists concurrently. The first instance of this method does that by creating
* two instances of irc::commasepstream and reading them both together until the first runs out of tokens.
* The second version is much simpler and just has the one stream to read, and is used in NAMES, WHOIS, PRIVMSG etc.
* Both will only parse until they reach ServerInstance->Config->MaxTargets number of targets, to stop abuse via spam.
*/
int CommandParser::LoopCall(User* user, Command* CommandObj, const std::vector<std::string>& parameters, unsigned int splithere, int extra, bool usemax)
{
if (splithere >= parameters.size())
return 0;
if (extra >= (signed)parameters.size())
extra = -1;
/* First check if we have more than one item in the list, if we don't we return zero here and the handler
* which called us just carries on as it was.
*/
if (parameters[splithere].find(',') == std::string::npos)
return 0;
/** Some lame ircds will weed out dupes using some shitty O(n^2) algorithm.
* By using std::set (thanks for the idea w00t) we can cut this down a ton.
* ...VOOODOOOO!
*/
std::set<irc::string> dupes;
/* Create two lists, one for channel names, one for keys
*/
irc::commasepstream items1(parameters[splithere], false);
irc::commasepstream items2(extra >= 0 ? parameters[extra] : "", false);
std::string extrastuff;
std::string item;
unsigned int max = 0;
/* Attempt to iterate these lists and call the command objech
* which called us, for every parameter pair until there are
* no more left to parse.
*/
while (items1.GetToken(item) && (!usemax || max++ < ServerInstance->Config->MaxTargets))
{
if (dupes.find(item.c_str()) == dupes.end())
{
std::vector<std::string> new_parameters(parameters);
if (!items2.GetToken(extrastuff))
extrastuff = "";
new_parameters[splithere] = item;
if (extra >= 0)
new_parameters[extra] = extrastuff;
CommandObj->Handle(new_parameters, user);
dupes.insert(item.c_str());
}
}
return 1;
}
bool CommandParser::IsValidCommand(const std::string &commandname, unsigned int pcnt, User * user)
{
Commandtable::iterator n = cmdlist.find(commandname);
if (n != cmdlist.end())
{
if ((pcnt >= n->second->min_params))
{
if (IS_LOCAL(user) && n->second->flags_needed)
{
if (user->IsModeSet(n->second->flags_needed))
{
return (user->HasPermission(commandname));
}
}
else
{
return true;
}
}
}
return false;
}
Command* CommandParser::GetHandler(const std::string &commandname)
{
Commandtable::iterator n = cmdlist.find(commandname);
if (n != cmdlist.end())
return n->second;
return NULL;
}
// calls a handler function for a command
CmdResult CommandParser::CallHandler(const std::string &commandname, const std::vector<std::string>& parameters, User *user)
{
Commandtable::iterator n = cmdlist.find(commandname);
if (n != cmdlist.end())
{
if (parameters.size() >= n->second->min_params)
{
bool bOkay = false;
if (IS_LOCAL(user) && n->second->flags_needed)
{
/* if user is local, and flags are needed .. */
if (user->IsModeSet(n->second->flags_needed))
{
/* if user has the flags, and now has the permissions, go ahead */
if (user->HasPermission(commandname))
bOkay = true;
}
}
else
{
/* remote or no flags required anyway */
bOkay = true;
}
if (bOkay)
{
return n->second->Handle(parameters,user);
}
}
}
return CMD_INVALID;
}
bool CommandParser::ProcessCommand(LocalUser *user, const std::string &cmd)
{
CrashState cmd_tracer(HERE_STR, cmd.c_str());
std::vector<std::string> command_p;
irc::tokenstream tokens(cmd);
std::string command, token;
tokens.GetToken(command);
/* A client sent a nick prefix on their command (ick)
* rhapsody and some braindead bouncers do this --
* the rfc says they shouldnt but also says the ircd should
* discard it if they do.
*/
if (command[0] == ':')
tokens.GetToken(command);
while (tokens.GetToken(token) && (command_p.size() <= MAXPARAMETERS))
command_p.push_back(token);
std::transform(command.begin(), command.end(), command.begin(), ::toupper);
/* find the command, check it exists */
Commandtable::iterator cm = cmdlist.find(command);
bool do_more = true;
if (cm == cmdlist.end())
{
ModResult MOD_RESULT;
FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, command_p, user, false, cmd));
if (MOD_RESULT == MOD_RES_DENY)
return true;
/*
* This double lookup is in case a module (abbreviation) wishes to change a command.
* Sure, the double lookup is a bit painful, but bear in mind this only happens for unknowns anyway.
*
* Thanks dz for making me actually understand why this is necessary!
* -- w00t
*/
cm = cmdlist.find(command);
if (cm == cmdlist.end())
{
if (user->registered == REG_ALL)
user->WriteNumeric(ERR_UNKNOWNCOMMAND, "%s %s :Unknown command",user->nick.c_str(),command.c_str());
// don't flood crap, please
user->CommandFloodPenalty += 2000;
ServerInstance->stats->statsUnknown++;
return true;
}
}
// account for the penalty of the command
user->CommandFloodPenalty += cm->second->Penalty * 1000;
if (cm->second->max_params && command_p.size() > cm->second->max_params)
{
/*
* command_p input (assuming max_params 1):
* this
* is
* a
* test
*/
std::string lparam = "";
/*
* The '-1' here is a clever trick, we'll go backwards throwing everything into a temporary param
* and then just toss that into the array.
* -- w00t
*/
while (command_p.size() > (cm->second->max_params - 1))
{
// BE CAREFUL: .end() returns past the end of the vector, hence decrement.
std::vector<std::string>::iterator it = --command_p.end();
lparam.insert(0, " " + *(it));
command_p.erase(it); // remove last element
}
/* we now have (each iteration):
* ' test'
* ' a test'
* ' is a test' <-- final string
* ...now remove the ' ' at the start...
*/
lparam.erase(lparam.begin());
/* param is now 'is a test', which is exactly what we wanted! */
command_p.push_back(lparam);
}
/*
* We call OnPreCommand here seperately if the command exists, so the magic above can
* truncate to max_params if necessary. -- w00t
*/
ModResult MOD_RESULT;
FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, command_p, user, false, cmd));
if (MOD_RESULT == MOD_RES_DENY)
return true;
/* activity resets the ping pending timer */
user->nping = ServerInstance->Time() + user->MyClass->pingtime;
if (cm->second->flags_needed)
{
if (!user->IsModeSet(cm->second->flags_needed))
{
user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - You do not have the required operator privileges",user->nick.c_str());
return do_more;
}
if (!user->HasPermission(command))
{
user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - Oper type %s does not have access to command %s",
user->nick.c_str(), user->oper->NameStr(), command.c_str());
return do_more;
}
}
if ((user->registered == REG_ALL) && (!IS_OPER(user)) && (cm->second->IsDisabled()))
{
/* command is disabled! */
if (ServerInstance->Config->DisabledDontExist)
{
user->WriteNumeric(ERR_UNKNOWNCOMMAND, "%s %s :Unknown command",user->nick.c_str(),command.c_str());
}
else
{
user->WriteNumeric(ERR_UNKNOWNCOMMAND, "%s %s :This command has been disabled.",
user->nick.c_str(), command.c_str());
}
ServerInstance->SNO->WriteToSnoMask('t', "%s denied for %s (%s@%s)",
command.c_str(), user->nick.c_str(), user->ident.c_str(), user->host.c_str());
return do_more;
}
if (command_p.size() < cm->second->min_params)
{
user->WriteNumeric(ERR_NEEDMOREPARAMS, "%s %s :Not enough parameters.", user->nick.c_str(), command.c_str());
if ((ServerInstance->Config->SyntaxHints) && (user->registered == REG_ALL) && (cm->second->syntax.length()))
user->WriteNumeric(RPL_SYNTAX, "%s :SYNTAX %s %s", user->nick.c_str(), cm->second->name.c_str(), cm->second->syntax.c_str());
return do_more;
}
if ((user->registered != REG_ALL) && (!cm->second->WorksBeforeReg()))
{
user->WriteNumeric(ERR_NOTREGISTERED, "%s :You have not registered",command.c_str());
return do_more;
}
else
{
/* passed all checks.. first, do the (ugly) stats counters. */
cm->second->use_count++;
cm->second->total_bytes += cmd.length();
/* module calls too */
FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, command_p, user, true, cmd));
if (MOD_RESULT == MOD_RES_DENY)
return do_more;
/*
* WARNING: be careful, the user may be deleted soon
*/
CmdResult result = cm->second->Handle(command_p, user);
FOREACH_MOD(I_OnPostCommand,OnPostCommand(command, command_p, user, result,cmd));
return do_more;
}
}
void CommandParser::RemoveCommand(Command* x)
{
Commandtable::iterator n = cmdlist.find(x->name);
if (n != cmdlist.end() && n->second == x)
cmdlist.erase(n);
}
Command::~Command()
{
ServerInstance->Parser->RemoveCommand(this);
}
bool CommandParser::ProcessBuffer(std::string &buffer,LocalUser *user)
{
if (!user || buffer.empty())
return true;
ServerInstance->Logs->Log("USERINPUT", RAWIO, "C[%s] I :%s %s",
user->uuid.c_str(), user->nick.c_str(), buffer.c_str());
return ProcessCommand(user,buffer);
}
bool CommandParser::AddCommand(Command *f)
{
/* create the command and push it onto the table */
if (cmdlist.find(f->name) == cmdlist.end())
{
cmdlist[f->name] = f;
return true;
}
return false;
}
CommandParser::CommandParser()
{
para.resize(128);
}
int CommandParser::TranslateUIDs(const std::vector<TranslateType> &to, const std::vector<std::string> &source, std::string &dest, bool prefix_final, Command* custom_translator)
{
std::vector<TranslateType>::const_iterator types = to.begin();
User* user = NULL;
unsigned int i;
int translations = 0;
dest.clear();
for(i=0; i < source.size(); i++)
{
TranslateType t;
std::string item = source[i];
if (types == to.end())
t = TR_TEXT;
else
{
t = *types;
types++;
}
if (prefix_final && i == source.size() - 1)
dest.append(":");
switch (t)
{
case TR_NICK:
/* Translate single nickname */
user = ServerInstance->FindNick(item);
if (user)
{
dest.append(user->uuid);
translations++;
}
else
dest.append(item);
break;
case TR_CUSTOM:
if (custom_translator)
custom_translator->EncodeParameter(item, i);
dest.append(item);
break;
case TR_END:
case TR_TEXT:
default:
/* Do nothing */
dest.append(item);
break;
}
if (i != source.size() - 1)
dest.append(" ");
}
return translations;
}
int CommandParser::TranslateUIDs(TranslateType to, const std::string &source, std::string &dest)
{
User* user = NULL;
std::string item;
int translations = 0;
dest.clear();
switch (to)
{
case TR_NICK:
/* Translate single nickname */
user = ServerInstance->FindNick(source);
if (user)
{
dest = user->uuid;
translations++;
}
else
dest = source;
break;
case TR_END:
case TR_TEXT:
default:
/* Do nothing */
dest = source;
break;
}
return translations;
}
