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/* +------------------------------------+
* | 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 "configreader.h"
#include <algorithm>
#include "users.h"
#include "modules.h"
#include "wildcard.h"
#include "xline.h"
#include "socketengine.h"
#include "socket.h"
#include "command_parse.h"
/* Directory Searching for Unix-Only */
#ifndef WIN32
#include <dirent.h>
#include <dlfcn.h>
#endif
bool InspIRCd::ULine(const char* server)
{
if (!server)
return false;
if (!*server)
return true;
return (Config->ulines.find(server) != Config->ulines.end());
}
bool InspIRCd::SilentULine(const char* server)
{
std::map<irc::string,bool>::iterator n = Config->ulines.find(server);
if (n != Config->ulines.end())
return n->second;
else return false;
}
int InspIRCd::OperPassCompare(const char* data,const char* input, int tagnumber)
{
int MOD_RESULT = 0;
FOREACH_RESULT_I(this,I_OnOperCompare,OnOperCompare(data, input, tagnumber))
if (MOD_RESULT == 1)
return 0;
if (MOD_RESULT == -1)
return 1;
return strcmp(data,input);
}
std::string InspIRCd::TimeString(time_t curtime)
{
return std::string(ctime(&curtime),24);
}
/** Refactored by Brain, Jun 2007. Much faster with some clever O(1) array
* lookups and pointer maths.
*/
long InspIRCd::Duration(const std::string &str)
{
unsigned char multiplier = 0;
long total = 0;
long times = 1;
long subtotal = 0;
/* Iterate each item in the string, looking for number or multiplier */
for (std::string::const_reverse_iterator i = str.rbegin(); i != str.rend(); ++i)
{
/* Found a number, queue it onto the current number */
if ((*i >= '0') && (*i <= '9'))
{
subtotal = subtotal + ((*i - '0') * times);
times = times * 10;
}
else
{
/* Found something thats not a number, find out how much
* it multiplies the built up number by, multiply the total
* and reset the built up number.
*/
if (subtotal)
total += subtotal * duration_multi[multiplier];
/* Next subtotal please */
subtotal = 0;
multiplier = *i;
times = 1;
}
}
if (multiplier)
{
total += subtotal * duration_multi[multiplier];
subtotal = 0;
}
/* Any trailing values built up are treated as raw seconds */
return total + subtotal;
}
/* 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(userrec* user, command_t* CommandObj, const char** parameters, int pcnt, unsigned int splithere, unsigned int extra)
{
/* 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 (!strchr(parameters[splithere],','))
return 0;
/** Some lame ircds will weed out dupes using some shitty O(n^2) algorithm.
* By using std::map (thanks for the idea w00t) we can cut this down a ton.
* ...VOOODOOOO!
*/
std::map<irc::string, bool> dupes;
/* Create two lists, one for channel names, one for keys
*/
irc::commasepstream items1(parameters[splithere]);
irc::commasepstream items2(parameters[extra]);
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 (((item = items1.GetToken()) != "") && (max++ < ServerInstance->Config->MaxTargets))
{
if (dupes.find(item.c_str()) == dupes.end())
{
const char* new_parameters[127];
for (int t = 0; (t < pcnt) && (t < 127); t++)
new_parameters[t] = parameters[t];
std::string extrastuff = items2.GetToken();
new_parameters[splithere] = item.c_str();
new_parameters[extra] = extrastuff.c_str();
CommandObj->Handle(new_parameters,pcnt,user);
dupes[item.c_str()] = true;
}
}
return 1;
}
int CommandParser::LoopCall(userrec* user, command_t* CommandObj, const char** parameters, int pcnt, unsigned int splithere)
{
/* 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 (!strchr(parameters[splithere],','))
return 0;
std::map<irc::string, bool> dupes;
/* Only one commasepstream here */
irc::commasepstream items1(parameters[splithere]);
std::string item("*");
unsigned int max = 0;
/* Parse the commasepstream until there are no tokens remaining.
* Each token we parse out, call the command handler that called us
* with it
*/
while (((item = items1.GetToken()) != "") && (max++ < ServerInstance->Config->MaxTargets))
{
if (dupes.find(item.c_str()) == dupes.end())
{
const char* new_parameters[127];
for (int t = 0; (t < pcnt) && (t < 127); t++)
new_parameters[t] = parameters[t];
new_parameters[splithere] = item.c_str();
parameters[splithere] = item.c_str();
/* Execute the command handler over and over. If someone pulls our user
* record out from under us (e.g. if we /kill a comma sep list, and we're
* in that list ourselves) abort if we're gone.
*/
CommandObj->Handle(new_parameters,pcnt,user);
dupes[item.c_str()] = true;
}
}
/* By returning 1 we tell our caller that nothing is to be done,
* as all the previous calls handled the data. This makes the parent
* return without doing any processing.
*/
return 1;
}
bool CommandParser::IsValidCommand(const std::string &commandname, int pcnt, userrec * user)
{
command_table::iterator n = cmdlist.find(commandname);
if (n != cmdlist.end())
{
if ((pcnt>=n->second->min_params) && (n->second->source != "<core>"))
{
if ((!n->second->flags_needed) || (user->modes[n->second->flags_needed-65]))
{
if (n->second->flags_needed)
{
return ((user->HasPermission(commandname)) || (ServerInstance->ULine(user->server)));
}
return true;
}
}
}
return false;
}
command_t* CommandParser::GetHandler(const std::string &commandname)
{
command_table::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 char** parameters, int pcnt, userrec *user)
{
command_table::iterator n = cmdlist.find(commandname);
if (n != cmdlist.end())
{
if (pcnt >= n->second->min_params)
{
if ((!n->second->flags_needed) || (user->modes[n->second->flags_needed-65]))
{
if (n->second->flags_needed)
{
if ((user->HasPermission(commandname)) || (!IS_LOCAL(user)))
{
return n->second->Handle(parameters,pcnt,user);
}
}
else
{
return n->second->Handle(parameters,pcnt,user);
}
}
}
}
return CMD_INVALID;
}
void CommandParser::ProcessCommand(userrec *user, std::string &cmd)
{
const char *command_p[127];
int items = 0;
irc::tokenstream tokens(cmd);
std::string command;
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.c_str() == ':')
tokens.GetToken(command);
while (tokens.GetToken(para[items]) && (items < 127))
{
command_p[items] = para[items].c_str();
items++;
}
std::transform(command.begin(), command.end(), command.begin(), ::toupper);
int MOD_RESULT = 0;
FOREACH_RESULT(I_OnPreCommand,OnPreCommand(command,command_p,items,user,false,cmd));
if (MOD_RESULT == 1) {
return;
}
command_table::iterator cm = cmdlist.find(command);
if (cm != cmdlist.end())
{
if (user)
{
/* activity resets the ping pending timer */
user->nping = ServerInstance->Time() + user->pingmax;
if (cm->second->flags_needed)
{
if (!user->IsModeSet(cm->second->flags_needed))
{
user->WriteServ("481 %s :Permission Denied - You do not have the required operator privileges",user->nick);
return;
}
if (!user->HasPermission(command))
{
user->WriteServ("481 %s :Permission Denied - Oper type %s does not have access to command %s",user->nick,user->oper,command.c_str());
return;
}
}
if ((user->registered == REG_ALL) && (!IS_OPER(user)) && (cm->second->IsDisabled()))
{
/* command is disabled! */
user->WriteServ("421 %s %s :This command has been disabled.",user->nick,command.c_str());
return;
}
if (items < cm->second->min_params)
{
user->WriteServ("461 %s %s :Not enough parameters.", user->nick, command.c_str());
/* If syntax is given, display this as the 461 reply */
if ((ServerInstance->Config->SyntaxHints) && (user->registered == REG_ALL) && (cm->second->syntax.length()))
user->WriteServ("304 %s :SYNTAX %s %s", user->nick, cm->second->command.c_str(), cm->second->syntax.c_str());
return;
}
if ((user->registered == REG_ALL) || (cm->second->WorksBeforeReg()))
{
/* ikky /stats counters */
cm->second->use_count++;
cm->second->total_bytes += cmd.length();
int MOD_RESULT = 0;
FOREACH_RESULT(I_OnPreCommand,OnPreCommand(command,command_p,items,user,true,cmd));
if (MOD_RESULT == 1)
return;
/*
* WARNING: nothing may come after the
* command handler call, as the handler
* may free the user structure!
*/
CmdResult result = cm->second->Handle(command_p,items,user);
FOREACH_MOD(I_OnPostCommand,OnPostCommand(command, command_p, items, user, result,cmd));
return;
}
else
{
user->WriteServ("451 %s :You have not registered",command.c_str());
return;
}
}
}
else if (user)
{
ServerInstance->stats->statsUnknown++;
user->WriteServ("421 %s %s :Unknown command",user->nick,command.c_str());
}
}
bool CommandParser::RemoveCommands(const char* source)
{
command_table::iterator i,safei;
for (i = cmdlist.begin(); i != cmdlist.end(); i++)
{
safei = i;
safei++;
if (safei != cmdlist.end())
{
RemoveCommand(safei, source);
}
}
safei = cmdlist.begin();
if (safei != cmdlist.end())
{
RemoveCommand(safei, source);
}
return true;
}
void CommandParser::RemoveCommand(command_table::iterator safei, const char* source)
{
command_t* x = safei->second;
if (x->source == std::string(source))
{
cmdlist.erase(safei);
delete x;
}
}
void CommandParser::ProcessBuffer(std::string &buffer,userrec *user)
{
std::string::size_type a;
if (!user)
return;
while ((a = buffer.rfind("\n")) != std::string::npos)
buffer.erase(a);
while ((a = buffer.rfind("\r")) != std::string::npos)
buffer.erase(a);
if (buffer.length())
{
if (!user->muted)
{
ServerInstance->Log(DEBUG,"C[%d] -> :%s %s",user->GetFd(), user->nick, buffer.c_str());
this->ProcessCommand(user,buffer);
}
}
}
bool CommandParser::CreateCommand(command_t *f, void* so_handle)
{
if (so_handle)
{
if (RFCCommands.find(f->command) == RFCCommands.end())
RFCCommands[f->command] = so_handle;
else
{
ServerInstance->Log(DEFAULT,"ERK! Somehow, we loaded a cmd_*.so file twice! Only the first instance is being recorded.");
return false;
}
}
/* create the command and push it onto the table */
if (cmdlist.find(f->command) == cmdlist.end())
{
cmdlist[f->command] = f;
return true;
}
else return false;
}
CommandParser::CommandParser(InspIRCd* Instance) : ServerInstance(Instance)
{
para.resize(128);
this->SetupCommandTable();
}
bool CommandParser::FindSym(void** v, void* h)
{
*v = dlsym(h, "init_command");
const char* err = dlerror();
if (err && !(*v))
{
ServerInstance->Log(SPARSE, "Error loading core command: %s\n", err);
return false;
}
return true;
}
bool CommandParser::ReloadCommand(const char* cmd)
{
char filename[MAXBUF];
char commandname[MAXBUF];
int y = 0;
for (const char* x = cmd; *x; x++, y++)
commandname[y] = toupper(*x);
commandname[y] = 0;
SharedObjectList::iterator command = RFCCommands.find(commandname);
if (command != RFCCommands.end())
{
command_t* cmdptr = cmdlist.find(commandname)->second;
cmdlist.erase(cmdlist.find(commandname));
for (char* x = commandname; *x; x++)
*x = tolower(*x);
delete cmdptr;
dlclose(command->second);
RFCCommands.erase(command);
snprintf(filename, MAXBUF, "cmd_%s.so", commandname);
this->LoadCommand(filename);
return true;
}
return false;
}
CmdResult cmd_reload::Handle(const char** parameters, int pcnt, userrec *user)
{
user->WriteServ("NOTICE %s :*** Reloading command '%s'",user->nick, parameters[0]);
if (ServerInstance->Parser->ReloadCommand(parameters[0]))
{
user->WriteServ("NOTICE %s :*** Successfully reloaded command '%s'", user->nick, parameters[0]);
ServerInstance->WriteOpers("*** RELOAD: %s reloaded the '%s' command.", user->nick, parameters[0]);
return CMD_SUCCESS;
}
else
{
user->WriteServ("NOTICE %s :*** Could not reload command '%s'", user->nick, parameters[0]);
return CMD_FAILURE;
}
}
void CommandParser::LoadCommand(const char* name)
{
char filename[MAXBUF];
void* h;
command_t* (*cmd_factory_func)(InspIRCd*);
snprintf(filename, MAXBUF, "%s/%s", LIBRARYDIR, name);
h = dlopen(filename, RTLD_NOW | RTLD_GLOBAL);
if (!h)
{
ServerInstance->Log(SPARSE, "Error loading core command: %s", dlerror());
return;
}
if (this->FindSym((void **)&cmd_factory_func, h))
{
command_t* newcommand = cmd_factory_func(ServerInstance);
this->CreateCommand(newcommand, h);
}
}
void CommandParser::SetupCommandTable()
{
RFCCommands.clear();
printf("\nLoading core commands");
fflush(stdout);
DIR* library = opendir(LIBRARYDIR);
if (library)
{
dirent* entry = NULL;
while ((entry = readdir(library)))
{
if (match(entry->d_name, "cmd_*.so"))
{
printf(".");
fflush(stdout);
this->LoadCommand(entry->d_name);
}
}
closedir(library);
printf("\n");
}
this->CreateCommand(new cmd_reload(ServerInstance));
}
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