ouch/inspircd
2
0
Fork 0
mirror of https://github.com/inspircd/inspircd.git synced 2025-04-17 05:30:04 -04:00
Code Issues Packages Projects Releases Wiki Activity
inspircd/src/users.cpp

807 lines
24 KiB
C++
Raw Blame History

/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* Inspire is copyright (C) 2002-2004 ChatSpike-Dev.
* E-mail:
* <brain@chatspike.net>
* <Craig@chatspike.net>
*
* Written by Craig Edwards, Craig McLure, and others.
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
using namespace std;
#include "inspircd_config.h"
#include "channels.h"
#include "connection.h"
#include "users.h"
#include "inspircd.h"
#include <stdio.h>
#ifdef THREADED_DNS
#include <pthread.h>
#include <signal.h>
#endif
#include "inspstring.h"
#include "commands.h"
#include "helperfuncs.h"
#include "typedefs.h"
#include "socketengine.h"
#include "hashcomp.h"
#include "message.h"
#include "wildcard.h"
#include "xline.h"
extern InspIRCd* ServerInstance;
extern int WHOWAS_STALE;
extern int WHOWAS_MAX;
extern std::vector<Module*> modules;
extern std::vector<ircd_module*> factory;
extern std::vector<InspSocket*> module_sockets;
extern int MODCOUNT;
extern InspSocket* socket_ref[65535];
extern time_t TIME;
extern userrec* fd_ref_table[65536];
extern ServerConfig *Config;
extern user_hash clientlist;
extern whowas_hash whowas;
extern Module* IOHookModule;
std::vector<userrec*> local_users;
std::vector<userrec*> all_opers;
template<typename T> inline string ConvToStr(const T &in)
{
stringstream tmp;
if (!(tmp << in)) return string();
return tmp.str();
}
userrec::userrec()
{
// the PROPER way to do it, AVOID bzero at *ALL* costs
strcpy(nick,"");
strcpy(ip,"127.0.0.1");
timeout = 0;
strcpy(ident,"");
strcpy(host,"");
strcpy(dhost,"");
strcpy(fullname,"");
strcpy(modes,"");
server = (char*)FindServerNamePtr(Config->ServerName);
strcpy(awaymsg,"");
strcpy(oper,"");
reset_due = TIME;
lines_in = 0;
fd = lastping = signon = idle_lastmsg = nping = registered = 0;
flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0;
haspassed = false;
dns_done = false;
recvq = "";
sendq = "";
chans.clear();
invites.clear();
}
userrec::~userrec()
{
}
void userrec::CloseSocket()
{
shutdown(this->fd,2);
close(this->fd);
}
char* userrec::GetFullHost()
{
static char result[MAXBUF];
snprintf(result,MAXBUF,"%s!%s@%s",nick,ident,dhost);
return result;
}
int userrec::ReadData(void* buffer, size_t size)
{
if (this->fd > -1)
{
return read(this->fd, buffer, size);
}
else return 0;
}
char* userrec::GetFullRealHost()
{
static char fresult[MAXBUF];
snprintf(fresult,MAXBUF,"%s!%s@%s",nick,ident,host);
return fresult;
}
bool userrec::IsInvited(irc::string &channel)
{
for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
{
irc::string compare = i->channel;
if (compare == channel)
{
return true;
}
}
return false;
}
InvitedList* userrec::GetInviteList()
{
return &invites;
}
void userrec::InviteTo(irc::string &channel)
{
Invited i;
i.channel = channel;
invites.push_back(i);
}
void userrec::RemoveInvite(irc::string &channel)
{
log(DEBUG,"Removing invites");
if (invites.size())
{
for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
{
irc::string compare = i->channel;
if (compare == channel)
{
invites.erase(i);
return;
}
}
}
}
bool userrec::HasPermission(std::string &command)
{
char TypeName[MAXBUF],Classes[MAXBUF],ClassName[MAXBUF],CommandList[MAXBUF];
char* mycmd;
char* savept;
char* savept2;
// users on u-lined servers can completely bypass
// all permissions based checks.
//
// of course, if this is sent to a remote server and this
// server is not ulined there, then that other server
// silently drops the command.
if (is_uline(this->server))
return true;
// are they even an oper at all?
if (strchr(this->modes,'o'))
{
for (int j =0; j < Config->ConfValueEnum("type",&Config->config_f); j++)
{
Config->ConfValue("type","name",j,TypeName,&Config->config_f);
if (!strcmp(TypeName,this->oper))
{
Config->ConfValue("type","classes",j,Classes,&Config->config_f);
char* myclass = strtok_r(Classes," ",&savept);
while (myclass)
{
for (int k =0; k < Config->ConfValueEnum("class",&Config->config_f); k++)
{
Config->ConfValue("class","name",k,ClassName,&Config->config_f);
if (!strcmp(ClassName,myclass))
{
Config->ConfValue("class","commands",k,CommandList,&Config->config_f);
mycmd = strtok_r(CommandList," ",&savept2);
while (mycmd)
{
if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
{
return true;
}
mycmd = strtok_r(NULL," ",&savept2);
}
}
}
myclass = strtok_r(NULL," ",&savept);
}
}
}
}
return false;
}
bool userrec::AddBuffer(std::string a)
{
std::string b = "";
for (unsigned int i = 0; i < a.length(); i++)
if ((a[i] != '\r') && (a[i] != '\0') && (a[i] != 7))
b = b + a[i];
std::stringstream stream(recvq);
stream << b;
recvq = stream.str();
unsigned int i = 0;
// count the size of the first line in the buffer.
while (i < recvq.length())
{
if (recvq[i++] == '\n')
break;
}
if (recvq.length() > (unsigned)this->recvqmax)
{
this->SetWriteError("RecvQ exceeded");
WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
}
// return false if we've had more than 600 characters WITHOUT
// a carriage return (this is BAD, drop the socket)
return (i < 600);
}
bool userrec::BufferIsReady()
{
for (unsigned int i = 0; i < recvq.length(); i++)
if (recvq[i] == '\n')
return true;
return false;
}
void userrec::ClearBuffer()
{
recvq = "";
}
std::string userrec::GetBuffer()
{
if (recvq == "")
return "";
char* line = (char*)recvq.c_str();
std::string ret = "";
while ((*line != '\n') && (strlen(line)))
{
ret = ret + *line;
line++;
}
if ((*line == '\n') || (*line == '\r'))
line++;
recvq = line;
return ret;
}
void userrec::AddWriteBuf(std::string data)
{
if (this->GetWriteError() != "")
return;
if (sendq.length() + data.length() > (unsigned)this->sendqmax)
{
/* Fix by brain - Set the error text BEFORE calling writeopers, because
* if we dont it'll recursively call here over and over again trying
* to repeatedly add the text to the sendq!
*/
this->SetWriteError("SendQ exceeded");
WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
return;
}
std::stringstream stream;
stream << sendq << data;
sendq = stream.str();
}
// send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
void userrec::FlushWriteBuf()
{
if (sendq.length())
{
char* tb = (char*)this->sendq.c_str();
int n_sent = write(this->fd,tb,this->sendq.length());
if (n_sent == -1)
{
this->SetWriteError(strerror(errno));
}
else
{
// advance the queue
tb += n_sent;
this->sendq = tb;
// update the user's stats counters
this->bytes_out += n_sent;
this->cmds_out++;
}
}
}
void userrec::SetWriteError(std::string error)
{
log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
// don't try to set the error twice, its already set take the first string.
if (this->WriteError == "")
this->WriteError = error;
}
std::string userrec::GetWriteError()
{
return this->WriteError;
}
void AddOper(userrec* user)
{
log(DEBUG,"Oper added to optimization list");
all_opers.push_back(user);
}
void DeleteOper(userrec* user)
{
for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
{
if (*a == user)
{
log(DEBUG,"Oper removed from optimization list");
all_opers.erase(a);
return;
}
}
}
void kill_link(userrec *user,const char* r)
{
user_hash::iterator iter = clientlist.find(user->nick);
char reason[MAXBUF];
strncpy(reason,r,MAXBUF);
if (strlen(reason)>MAXQUIT)
{
reason[MAXQUIT-1] = '\0';
}
log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
if (user->registered == 7) {
FOREACH_MOD OnUserQuit(user,reason);
WriteCommonExcept(user,"QUIT :%s",reason);
}
user->FlushWriteBuf();
FOREACH_MOD OnUserDisconnect(user);
if (user->fd > -1)
{
if (IOHookModule)
{
IOHookModule->OnRawSocketClose(user->fd);
}
ServerInstance->SE->DelFd(user->fd);
user->CloseSocket();
}
// this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
// if they were an oper with +s.
if (user->registered == 7) {
purge_empty_chans(user);
// fix by brain: only show local quits because we only show local connects (it just makes SENSE)
if (user->fd > -1)
WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
AddWhoWas(user);
}
if (iter != clientlist.end())
{
log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
if (user->fd > -1)
{
fd_ref_table[user->fd] = NULL;
if (find(local_users.begin(),local_users.end(),user) != local_users.end())
{
local_users.erase(find(local_users.begin(),local_users.end(),user));
log(DEBUG,"Delete local user");
}
}
clientlist.erase(iter);
}
delete user;
}
void kill_link_silent(userrec *user,const char* r)
{
user_hash::iterator iter = clientlist.find(user->nick);
char reason[MAXBUF];
strncpy(reason,r,MAXBUF);
if (strlen(reason)>MAXQUIT)
{
reason[MAXQUIT-1] = '\0';
}
log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
user->FlushWriteBuf();
if (user->registered == 7) {
FOREACH_MOD OnUserQuit(user,reason);
WriteCommonExcept(user,"QUIT :%s",reason);
}
FOREACH_MOD OnUserDisconnect(user);
if (user->fd > -1)
{
if (IOHookModule)
{
IOHookModule->OnRawSocketClose(user->fd);
}
ServerInstance->SE->DelFd(user->fd);
user->CloseSocket();
}
if (user->registered == 7) {
purge_empty_chans(user);
}
if (iter != clientlist.end())
{
log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
if (user->fd > -1)
{
fd_ref_table[user->fd] = NULL;
if (find(local_users.begin(),local_users.end(),user) != local_users.end())
{
log(DEBUG,"Delete local user");
local_users.erase(find(local_users.begin(),local_users.end(),user));
}
}
clientlist.erase(iter);
}
delete user;
}
/* adds or updates an entry in the whowas list */
void AddWhoWas(userrec* u)
{
whowas_hash::iterator iter = whowas.find(u->nick);
WhoWasUser *a = new WhoWasUser();
strlcpy(a->nick,u->nick,NICKMAX);
strlcpy(a->ident,u->ident,IDENTMAX);
strlcpy(a->dhost,u->dhost,160);
strlcpy(a->host,u->host,160);
strlcpy(a->fullname,u->fullname,MAXGECOS);
strlcpy(a->server,u->server,256);
a->signon = u->signon;
/* MAX_WHOWAS: max number of /WHOWAS items
* WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
* can be replaced by a newer one
*/
if (iter == whowas.end())
{
if (whowas.size() >= (unsigned)WHOWAS_MAX)
{
for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
{
// 3600 seconds in an hour ;)
if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
{
// delete the old one
if (i->second) delete i->second;
// replace with new one
i->second = a;
log(DEBUG,"added WHOWAS entry, purged an old record");
return;
}
}
// no space left and user doesnt exist. Don't leave ram in use!
log(DEBUG,"Not able to update whowas (list at WHOWAS_MAX entries and trying to add new?), freeing excess ram");
delete a;
}
else
{
log(DEBUG,"added fresh WHOWAS entry");
whowas[a->nick] = a;
}
}
else
{
log(DEBUG,"updated WHOWAS entry");
if (iter->second) delete iter->second;
iter->second = a;
}
}
/* add a client connection to the sockets list */
void AddClient(int socket, char* host, int port, bool iscached, char* ip)
{
string tempnick;
char tn2[MAXBUF];
user_hash::iterator iter;
tempnick = ConvToStr(socket) + "-unknown";
sprintf(tn2,"%lu-unknown",(unsigned long)socket);
iter = clientlist.find(tempnick);
// fix by brain.
// as these nicknames are 'RFC impossible', we can be sure nobody is going to be
// using one as a registered connection. As theyre per fd, we can also safely assume
// that we wont have collisions. Therefore, if the nick exists in the list, its only
// used by a dead socket, erase the iterator so that the new client may reclaim it.
// this was probably the cause of 'server ignores me when i hammer it with reconnects'
// issue in earlier alphas/betas
if (iter != clientlist.end())
{
userrec* goner = iter->second;
delete goner;
clientlist.erase(iter);
}
/*
* It is OK to access the value here this way since we know
* it exists, we just created it above.
*
* At NO other time should you access a value in a map or a
* hash_map this way.
*/
clientlist[tempnick] = new userrec();
NonBlocking(socket);
log(DEBUG,"AddClient: %lu %s %d %s",(unsigned long)socket,host,port,ip);
clientlist[tempnick]->fd = socket;
strlcpy(clientlist[tempnick]->nick, tn2,NICKMAX);
strlcpy(clientlist[tempnick]->host, host,160);
strlcpy(clientlist[tempnick]->dhost, host,160);
clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
strlcpy(clientlist[tempnick]->ident, "unknown",IDENTMAX);
clientlist[tempnick]->registered = 0;
clientlist[tempnick]->signon = TIME + Config->dns_timeout;
clientlist[tempnick]->lastping = 1;
clientlist[tempnick]->port = port;
strlcpy(clientlist[tempnick]->ip,ip,16);
// set the registration timeout for this user
unsigned long class_regtimeout = 90;
int class_flood = 0;
long class_threshold = 5;
long class_sqmax = 262144; // 256kb
long class_rqmax = 4096; // 4k
for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
{
if (match(clientlist[tempnick]->host,i->host) && (i->type == CC_ALLOW))
{
class_regtimeout = (unsigned long)i->registration_timeout;
class_flood = i->flood;
clientlist[tempnick]->pingmax = i->pingtime;
class_threshold = i->threshold;
class_sqmax = i->sendqmax;
class_rqmax = i->recvqmax;
break;
}
}
clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
clientlist[tempnick]->timeout = TIME+class_regtimeout;
clientlist[tempnick]->flood = class_flood;
clientlist[tempnick]->threshold = class_threshold;
clientlist[tempnick]->sendqmax = class_sqmax;
clientlist[tempnick]->recvqmax = class_rqmax;
ucrec a;
a.channel = NULL;
a.uc_modes = 0;
for (int i = 0; i < MAXCHANS; i++)
clientlist[tempnick]->chans.push_back(a);
if (clientlist.size() > Config->SoftLimit)
{
kill_link(clientlist[tempnick],"No more connections allowed");
return;
}
if (clientlist.size() >= MAXCLIENTS)
{
kill_link(clientlist[tempnick],"No more connections allowed");
return;
}
// this is done as a safety check to keep the file descriptors within range of fd_ref_table.
// its a pretty big but for the moment valid assumption:
// file descriptors are handed out starting at 0, and are recycled as theyre freed.
// therefore if there is ever an fd over 65535, 65536 clients must be connected to the
// irc server at once (or the irc server otherwise initiating this many connections, files etc)
// which for the time being is a physical impossibility (even the largest networks dont have more
// than about 10,000 users on ONE server!)
if ((unsigned)socket > 65534)
{
kill_link(clientlist[tempnick],"Server is full");
return;
}
char* e = matches_exception(ip);
if (!e)
{
char* r = matches_zline(ip);
if (r)
{
char reason[MAXBUF];
snprintf(reason,MAXBUF,"Z-Lined: %s",r);
kill_link(clientlist[tempnick],reason);
return;
}
}
fd_ref_table[socket] = clientlist[tempnick];
local_users.push_back(clientlist[tempnick]);
ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
}
void FullConnectUser(userrec* user)
{
ServerInstance->stats->statsConnects++;
user->idle_lastmsg = TIME;
log(DEBUG,"ConnectUser: %s",user->nick);
if ((strcmp(Passwd(user),"")) && (!user->haspassed))
{
kill_link(user,"Invalid password");
return;
}
if (IsDenied(user))
{
kill_link(user,"Unauthorised connection");
return;
}
char match_against[MAXBUF];
snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
char* e = matches_exception(match_against);
if (!e)
{
char* r = matches_gline(match_against);
if (r)
{
char reason[MAXBUF];
snprintf(reason,MAXBUF,"G-Lined: %s",r);
kill_link_silent(user,reason);
return;
}
r = matches_kline(user->host);
if (r)
{
char reason[MAXBUF];
snprintf(reason,MAXBUF,"K-Lined: %s",r);
kill_link_silent(user,reason);
return;
}
}
WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
WriteServ(user->fd,"004 %s %s %s iowghraAsORVSxNCWqBzvdHtGI lvhopsmntikrRcaqOALQbSeKVfHGCuzN",user->nick,Config->ServerName,VERSION);
// the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
std::stringstream v;
v << "WALLCHOPS MODES=13 CHANTYPES=# PREFIX=(ohv)@%+ MAP SAFELIST MAXCHANNELS=" << MAXCHANS;
v << " MAXBANS=60 NICKLEN=" << NICKMAX;
v << " TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=20 AWAYLEN=" << MAXAWAY << " CHANMODES=ohvb,k,l,psmnti NETWORK=";
v << Config->Network;
std::string data005 = v.str();
FOREACH_MOD On005Numeric(data005);
// anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
// so i'd better split it :)
std::stringstream out(data005);
std::string token = "";
std::string line5 = "";
int token_counter = 0;
while (!out.eof())
{
out >> token;
line5 = line5 + token + " ";
token_counter++;
if ((token_counter >= 13) || (out.eof() == true))
{
WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
line5 = "";
token_counter = 0;
}
}
ShowMOTD(user);
// fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
// onto the network and produce 'fake direction'
FOREACH_MOD OnUserConnect(user);
FOREACH_MOD OnGlobalConnect(user);
user->registered = 7;
WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,user->ip);
}
/* shows the message of the day, and any other on-logon stuff */
void ConnectUser(userrec *user)
{
// dns is already done, things are fast. no need to wait for dns to complete just pass them straight on
if ((user->dns_done) && (user->registered >= 3) && (AllModulesReportReady(user)))
{
FullConnectUser(user);
}
}
/* re-allocates a nick in the user_hash after they change nicknames,
* returns a pointer to the new user as it may have moved */
userrec* ReHashNick(char* Old, char* New)
{
//user_hash::iterator newnick;
user_hash::iterator oldnick = clientlist.find(Old);
log(DEBUG,"ReHashNick: %s %s",Old,New);
if (!strcasecmp(Old,New))
{
log(DEBUG,"old nick is new nick, skipping");
return oldnick->second;
}
if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
userrec* olduser = oldnick->second;
clientlist[New] = olduser;
clientlist.erase(oldnick);
log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
return clientlist[New];
}
void force_nickchange(userrec* user,const char* newnick)
{
char nick[MAXBUF];
int MOD_RESULT = 0;
strcpy(nick,"");
FOREACH_RESULT(OnUserPreNick(user,newnick));
if (MOD_RESULT) {
ServerInstance->stats->statsCollisions++;
kill_link(user,"Nickname collision");
return;
}
if (matches_qline(newnick))
{
ServerInstance->stats->statsCollisions++;
kill_link(user,"Nickname collision");
return;
}
if (user)
{
if (newnick)
{
strncpy(nick,newnick,MAXBUF);
}
if (user->registered == 7)
{
char* pars[1];
pars[0] = nick;
std::string cmd = "NICK";
ServerInstance->Parser->CallHandler(cmd,pars,1,user);
}
}
}
Reference in New Issue View Git Blame Copy Permalink