1 /* +------------------------------------+
\r * | Inspire Internet Relay Chat Daemon |
\r * +------------------------------------+
\r *
\r * InspIRCd: (C) 2002-2007 InspIRCd Development Team
\r * See: http://www.inspircd.org/wiki/index.php/Credits
\r *
\r * This program is free but copyrighted software; see
\r * the file COPYING for details.
\r *
\r * ---------------------------------------------------
\r */
\r\r#include "inspircd.h"
\r#include "configreader.h"
\r#include <algorithm>
\r#include "users.h"
\r#include "modules.h"
\r#include "wildcard.h"
\r#include "xline.h"
\r#include "socketengine.h"
\r#include "socket.h"
\r#include "command_parse.h"
\r\r/* Directory Searching for Unix-Only */
\r#ifndef WIN32
\r#include <dirent.h>
\r#include <dlfcn.h>
\r#endif
\r\rbool InspIRCd::ULine(const char* server)
\r{
\r if (!server)
\r return false;
\r if (!*server)
\r return true;
\r\r return (Config->ulines.find(server) != Config->ulines.end());
\r}
\r\rbool InspIRCd::SilentULine(const char* server)
\r{
\r std::map<irc::string,bool>::iterator n = Config->ulines.find(server);
\r if (n != Config->ulines.end())
\r return n->second;
\r else return false;
\r}
\r\rint InspIRCd::OperPassCompare(const char* data,const char* input, int tagnumber)
\r{
\r int MOD_RESULT = 0;
\r FOREACH_RESULT_I(this,I_OnOperCompare,OnOperCompare(data, input, tagnumber))
\r if (MOD_RESULT == 1)
\r return 0;
\r if (MOD_RESULT == -1)
\r return 1;
\r return strcmp(data,input);
\r}
\r\rstd::string InspIRCd::TimeString(time_t curtime)
\r{
\r return std::string(ctime(&curtime),24);
\r}
\r\r/** Refactored by Brain, Jun 2007. Much faster with some clever O(1) array
\r * lookups and pointer maths.
\r */
\rlong InspIRCd::Duration(const std::string &str)
\r{
\r unsigned char multiplier = 0;
\r long total = 0;
\r long times = 1;
\r long subtotal = 0;
\r\r /* Iterate each item in the string, looking for number or multiplier */
\r for (std::string::const_reverse_iterator i = str.rbegin(); i != str.rend(); ++i)
\r {
\r /* Found a number, queue it onto the current number */
\r if ((*i >= '0') && (*i <= '9'))
\r {
\r subtotal = subtotal + ((*i - '0') * times);
\r times = times * 10;
\r }
\r else
\r {
\r /* Found something thats not a number, find out how much
\r * it multiplies the built up number by, multiply the total
\r * and reset the built up number.
\r */
\r if (subtotal)
\r total += subtotal * duration_multi[multiplier];
\r\r /* Next subtotal please */
\r subtotal = 0;
\r multiplier = *i;
\r times = 1;
\r }
\r }
\r if (multiplier)
\r {
\r total += subtotal * duration_multi[multiplier];
\r subtotal = 0;
\r }
\r /* Any trailing values built up are treated as raw seconds */
\r return total + subtotal;
\r}
\r\r/* LoopCall is used to call a command classes handler repeatedly based on the contents of a comma seperated list.
\r * There are two overriden versions of this method, one of which takes two potential lists and the other takes one.
\r * We need a version which takes two potential lists for JOIN, because a JOIN may contain two lists of items at once,
\r * the channel names and their keys as follows:
\r * JOIN #chan1,#chan2,#chan3 key1,,key3
\r * Therefore, we need to deal with both lists concurrently. The first instance of this method does that by creating
\r * two instances of irc::commasepstream and reading them both together until the first runs out of tokens.
\r * The second version is much simpler and just has the one stream to read, and is used in NAMES, WHOIS, PRIVMSG etc.
\r * Both will only parse until they reach ServerInstance->Config->MaxTargets number of targets, to stop abuse via spam.
\r */
\rint CommandParser::LoopCall(userrec* user, command_t* CommandObj, const char** parameters, int pcnt, unsigned int splithere, unsigned int extra)
\r{
\r /* First check if we have more than one item in the list, if we don't we return zero here and the handler
\r * which called us just carries on as it was.
\r */
\r if (!strchr(parameters[splithere],','))
\r return 0;
\r\r /** Some lame ircds will weed out dupes using some shitty O(n^2) algorithm.
\r * By using std::map (thanks for the idea w00t) we can cut this down a ton.
\r * ...VOOODOOOO!
\r */
\r std::map<irc::string, bool> dupes;
\r\r /* Create two lists, one for channel names, one for keys
\r */
\r irc::commasepstream items1(parameters[splithere]);
\r irc::commasepstream items2(parameters[extra]);
\r std::string item("*");
\r unsigned int max = 0;
\r\r /* Attempt to iterate these lists and call the command objech
\r * which called us, for every parameter pair until there are
\r * no more left to parse.
\r */
\r while (((item = items1.GetToken()) != "") && (max++ < ServerInstance->Config->MaxTargets))
\r {
\r if (dupes.find(item.c_str()) == dupes.end())
\r {
\r const char* new_parameters[127];
\r\r for (int t = 0; (t < pcnt) && (t < 127); t++)
\r new_parameters[t] = parameters[t];
\r\r std::string extrastuff = items2.GetToken();
\r\r new_parameters[splithere] = item.c_str();
\r new_parameters[extra] = extrastuff.c_str();
\r\r CommandObj->Handle(new_parameters,pcnt,user);
\r\r dupes[item.c_str()] = true;
\r }
\r }
\r return 1;
\r}
\r\rint CommandParser::LoopCall(userrec* user, command_t* CommandObj, const char** parameters, int pcnt, unsigned int splithere)
\r{
\r /* First check if we have more than one item in the list, if we don't we return zero here and the handler
\r * which called us just carries on as it was.
\r */
\r if (!strchr(parameters[splithere],','))
\r return 0;
\r\r std::map<irc::string, bool> dupes;
\r\r /* Only one commasepstream here */
\r irc::commasepstream items1(parameters[splithere]);
\r std::string item("*");
\r unsigned int max = 0;
\r\r /* Parse the commasepstream until there are no tokens remaining.
\r * Each token we parse out, call the command handler that called us
\r * with it
\r */
\r while (((item = items1.GetToken()) != "") && (max++ < ServerInstance->Config->MaxTargets))
\r {
\r if (dupes.find(item.c_str()) == dupes.end())
\r {
\r const char* new_parameters[127];
\r\r for (int t = 0; (t < pcnt) && (t < 127); t++)
\r new_parameters[t] = parameters[t];
\r\r new_parameters[splithere] = item.c_str();
\r\r parameters[splithere] = item.c_str();
\r\r /* Execute the command handler over and over. If someone pulls our user
\r * record out from under us (e.g. if we /kill a comma sep list, and we're
\r * in that list ourselves) abort if we're gone.
\r */
\r CommandObj->Handle(new_parameters,pcnt,user);
\r\r dupes[item.c_str()] = true;
\r }
\r }
\r /* By returning 1 we tell our caller that nothing is to be done,
\r * as all the previous calls handled the data. This makes the parent
\r * return without doing any processing.
\r */
\r return 1;
\r}
\r\rbool CommandParser::IsValidCommand(const std::string &commandname, int pcnt, userrec * user)
\r{
\r command_table::iterator n = cmdlist.find(commandname);
\r\r if (n != cmdlist.end())
\r {
\r if ((pcnt>=n->second->min_params) && (n->second->source != "<core>"))
\r {
\r if ((!n->second->flags_needed) || (user->modes[n->second->flags_needed-65]))
\r {
\r if (n->second->flags_needed)
\r {
\r return ((user->HasPermission(commandname)) || (ServerInstance->ULine(user->server)));
\r }
\r return true;
\r }
\r }
\r }
\r return false;
\r}
\r\rcommand_t* CommandParser::GetHandler(const std::string &commandname)
\r{
\r command_table::iterator n = cmdlist.find(commandname);
\r if (n != cmdlist.end())
\r return n->second;
\r\r return NULL;
\r}
\r\r// calls a handler function for a command
\r\rCmdResult CommandParser::CallHandler(const std::string &commandname,const char** parameters, int pcnt, userrec *user)
\r{
\r command_table::iterator n = cmdlist.find(commandname);
\r\r if (n != cmdlist.end())
\r {
\r if (pcnt >= n->second->min_params)
\r {
\r if ((!n->second->flags_needed) || (user->modes[n->second->flags_needed-65]))
\r {
\r if (n->second->flags_needed)
\r {
\r if ((user->HasPermission(commandname)) || (!IS_LOCAL(user)))
\r {
\r return n->second->Handle(parameters,pcnt,user);
\r }
\r }
\r else
\r {
\r return n->second->Handle(parameters,pcnt,user);
\r }
\r }
\r }
\r }
\r return CMD_INVALID;
\r}
\r\rvoid CommandParser::ProcessCommand(userrec *user, std::string &cmd)
\r{
\r const char *command_p[127];
\r int items = 0;
\r irc::tokenstream tokens(cmd);
\r std::string command;
\r tokens.GetToken(command);
\r\r /* A client sent a nick prefix on their command (ick)
\r * rhapsody and some braindead bouncers do this --
\r * the rfc says they shouldnt but also says the ircd should
\r * discard it if they do.
\r */
\r if (*command.c_str() == ':')
\r tokens.GetToken(command);
\r\r while (tokens.GetToken(para[items]) && (items < 127))
\r {
\r command_p[items] = para[items].c_str();
\r items++;
\r }
\r\r std::transform(command.begin(), command.end(), command.begin(), ::toupper);
\r \r int MOD_RESULT = 0;
\r FOREACH_RESULT(I_OnPreCommand,OnPreCommand(command,command_p,items,user,false,cmd));
\r if (MOD_RESULT == 1) {
\r return;
\r }
\r\r command_table::iterator cm = cmdlist.find(command);
\r \r if (cm != cmdlist.end())
\r {
\r if (user)
\r {
\r /* activity resets the ping pending timer */
\r user->nping = ServerInstance->Time() + user->pingmax;
\r if (cm->second->flags_needed)
\r {
\r if (!user->IsModeSet(cm->second->flags_needed))
\r {
\r user->WriteServ("481 %s :Permission Denied - You do not have the required operator privileges",user->nick);
\r return;
\r }
\r if (!user->HasPermission(command))
\r {
\r user->WriteServ("481 %s :Permission Denied - Oper type %s does not have access to command %s",user->nick,user->oper,command.c_str());
\r return;
\r }
\r }
\r if ((user->registered == REG_ALL) && (!IS_OPER(user)) && (cm->second->IsDisabled()))
\r {
\r /* command is disabled! */
\r user->WriteServ("421 %s %s :This command has been disabled.",user->nick,command.c_str());
\r return;
\r }
\r if (items < cm->second->min_params)
\r {
\r user->WriteServ("461 %s %s :Not enough parameters.", user->nick, command.c_str());
\r /* If syntax is given, display this as the 461 reply */
\r if ((ServerInstance->Config->SyntaxHints) && (user->registered == REG_ALL) && (cm->second->syntax.length()))
\r user->WriteServ("304 %s :SYNTAX %s %s", user->nick, cm->second->command.c_str(), cm->second->syntax.c_str());
\r return;
\r }
\r if ((user->registered == REG_ALL) || (cm->second->WorksBeforeReg()))
\r {
\r /* ikky /stats counters */
\r cm->second->use_count++;
\r cm->second->total_bytes += cmd.length();
\r\r int MOD_RESULT = 0;
\r FOREACH_RESULT(I_OnPreCommand,OnPreCommand(command,command_p,items,user,true,cmd));
\r if (MOD_RESULT == 1)
\r return;
\r\r /*
\r * WARNING: nothing may come after the
\r * command handler call, as the handler
\r * may free the user structure!
\r */
\r CmdResult result = cm->second->Handle(command_p,items,user);
\r\r FOREACH_MOD(I_OnPostCommand,OnPostCommand(command, command_p, items, user, result,cmd));
\r return;
\r }
\r else
\r {
\r user->WriteServ("451 %s :You have not registered",command.c_str());
\r return;
\r }
\r }
\r }
\r else if (user)
\r {
\r ServerInstance->stats->statsUnknown++;
\r user->WriteServ("421 %s %s :Unknown command",user->nick,command.c_str());
\r }
\r}
\r\rbool CommandParser::RemoveCommands(const char* source)
\r{
\r command_table::iterator i,safei;
\r for (i = cmdlist.begin(); i != cmdlist.end(); i++)
\r {
\r safei = i;
\r safei++;
\r if (safei != cmdlist.end())
\r {
\r RemoveCommand(safei, source);
\r }
\r }
\r safei = cmdlist.begin();
\r if (safei != cmdlist.end())
\r {
\r RemoveCommand(safei, source);
\r }
\r return true;
\r}
\r\rvoid CommandParser::RemoveCommand(command_table::iterator safei, const char* source)
\r{
\r command_t* x = safei->second;
\r if (x->source == std::string(source))
\r {
\r cmdlist.erase(safei);
\r delete x;
\r }
\r}
\r\rvoid CommandParser::ProcessBuffer(std::string &buffer,userrec *user)
\r{
\r std::string::size_type a;
\r\r if (!user)
\r return;
\r\r while ((a = buffer.rfind("\n")) != std::string::npos)
\r buffer.erase(a);
\r while ((a = buffer.rfind("\r")) != std::string::npos)
\r buffer.erase(a);
\r\r if (buffer.length())
\r {
\r if (!user->muted)
\r {
\r ServerInstance->Log(DEBUG,"C[%d] -> :%s %s",user->GetFd(), user->nick, buffer.c_str());
\r this->ProcessCommand(user,buffer);
\r }
\r }
\r}
\r\rbool CommandParser::CreateCommand(command_t *f, void* so_handle)
\r{
\r if (so_handle)
\r {
\r if (RFCCommands.find(f->command) == RFCCommands.end())
\r RFCCommands[f->command] = so_handle;
\r else
\r {
\r ServerInstance->Log(DEFAULT,"ERK! Somehow, we loaded a cmd_*.so file twice! Only the first instance is being recorded.");
\r return false;
\r }
\r }
\r\r /* create the command and push it onto the table */
\r if (cmdlist.find(f->command) == cmdlist.end())
\r {
\r cmdlist[f->command] = f;
\r return true;
\r }
\r else return false;
\r}
\r\rCommandParser::CommandParser(InspIRCd* Instance) : ServerInstance(Instance)
\r{
\r para.resize(128);
\r this->SetupCommandTable();
\r}
\r\rbool CommandParser::FindSym(void** v, void* h)
\r{
\r *v = dlsym(h, "init_command");
\r const char* err = dlerror();
\r if (err && !(*v))
\r {
\r ServerInstance->Log(SPARSE, "Error loading core command: %s\n", err);
\r return false;
\r }
\r return true;
\r}
\r\rbool CommandParser::ReloadCommand(const char* cmd)
\r{
\r char filename[MAXBUF];
\r char commandname[MAXBUF];
\r int y = 0;
\r\r for (const char* x = cmd; *x; x++, y++)
\r commandname[y] = toupper(*x);
\r\r commandname[y] = 0;
\r\r SharedObjectList::iterator command = RFCCommands.find(commandname);
\r\r if (command != RFCCommands.end())
\r {
\r command_t* cmdptr = cmdlist.find(commandname)->second;
\r cmdlist.erase(cmdlist.find(commandname));
\r\r for (char* x = commandname; *x; x++)
\r *x = tolower(*x);
\r\r\r delete cmdptr;
\r dlclose(command->second);
\r RFCCommands.erase(command);
\r\r snprintf(filename, MAXBUF, "cmd_%s.so", commandname);
\r this->LoadCommand(filename);
\r\r return true;
\r }
\r\r return false;
\r}
\r\rCmdResult cmd_reload::Handle(const char** parameters, int pcnt, userrec *user)
\r{
\r user->WriteServ("NOTICE %s :*** Reloading command '%s'",user->nick, parameters[0]);
\r if (ServerInstance->Parser->ReloadCommand(parameters[0]))
\r {
\r user->WriteServ("NOTICE %s :*** Successfully reloaded command '%s'", user->nick, parameters[0]);
\r ServerInstance->WriteOpers("*** RELOAD: %s reloaded the '%s' command.", user->nick, parameters[0]);
\r return CMD_SUCCESS;
\r }
\r else
\r {
\r user->WriteServ("NOTICE %s :*** Could not reload command '%s'", user->nick, parameters[0]);
\r return CMD_FAILURE;
\r }
\r}
\r\rvoid CommandParser::LoadCommand(const char* name)
\r{
\r char filename[MAXBUF];
\r void* h;
\r command_t* (*cmd_factory_func)(InspIRCd*);
\r\r snprintf(filename, MAXBUF, "%s/%s", LIBRARYDIR, name);
\r h = dlopen(filename, RTLD_NOW | RTLD_GLOBAL);
\r\r if (!h)
\r {
\r ServerInstance->Log(SPARSE, "Error loading core command: %s", dlerror());
\r return;
\r }
\r\r if (this->FindSym((void **)&cmd_factory_func, h))
\r {
\r command_t* newcommand = cmd_factory_func(ServerInstance);
\r this->CreateCommand(newcommand, h);
\r }
\r}
\r\rvoid CommandParser::SetupCommandTable()
\r{
\r RFCCommands.clear();
\r\r printf("\nLoading core commands");
\r fflush(stdout);
\r\r DIR* library = opendir(LIBRARYDIR);
\r if (library)
\r {
\r dirent* entry = NULL;
\r while ((entry = readdir(library)))
\r {
\r if (match(entry->d_name, "cmd_*.so"))
\r {
\r printf(".");
\r fflush(stdout);
\r this->LoadCommand(entry->d_name);
\r }
\r }
\r closedir(library);
\r printf("\n");
\r }
\r\r this->CreateCommand(new cmd_reload(ServerInstance));
\r}
\r\r
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