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/*
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
*
* Copyright (c) 1997-2018 ircd-hybrid development team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
* USA
*/
/*! \file m_connect.c
* \brief Includes required functions for processing the CONNECT command.
* \version $Id: m_connect.c 8430 2018-03-27 18:48:40Z michael $
*/
#include "stdinc.h"
#include "client.h"
#include "ircd.h"
#include "irc_string.h"
#include "numeric.h"
#include "conf.h"
#include "log.h"
#include "server.h"
#include "send.h"
#include "parse.h"
#include "hash.h"
#include "modules.h"
/*! \brief CONNECT command handler
*
* \param source_p Pointer to allocated Client struct from which the message
* originally comes from. This can be a local or remote client.
* \param parc Integer holding the number of supplied arguments.
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
* pointers.
* \note Valid arguments for this command are:
* - parv[0] = command
* - parv[1] = target server
* - parv[2] = unused/ignored
* - parv[3] = nickname/servername
*/
static int
mo_connect(struct Client *source_p, int parc, char *parv[])
{
const char *const name = parv[1];
if (EmptyString(name))
{
sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "CONNECT");
return 0;
}
if (parc > 3)
{
if (!HasOFlag(source_p, OPER_FLAG_CONNECT_REMOTE))
{
sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "connect:remote");
return 0;
}
if (server_hunt(source_p, ":%s CONNECT %s %s :%s", 3, parc, parv)->ret != HUNTED_ISME)
return 0;
}
if (!HasOFlag(source_p, OPER_FLAG_CONNECT))
{
sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "connect");
return 0;
}
/*
* Try to find the name. If it fails, notify and bail.
*/
struct MaskItem *conf;
if ((conf = connect_find(name, match)) == NULL)
{
sendto_one_notice(source_p, &me, ":Connect: Server %s not listed in configuration file", name);
return 0;
}
const struct Client *target_p;
if ((target_p = hash_find_server(conf->name)))
{
sendto_one_notice(source_p, &me, ":Connect: Server %s already exists from %s",
target_p->name, target_p->from->name);
return 0;
}
if (find_servconn_in_progress(conf->name))
{
sendto_one_notice(source_p, &me, ":Connect: a connection to %s is already in progress",
conf->name);
return 0;
}
ilog(LOG_TYPE_IRCD, "CONNECT %s %u from %s",
name, conf->port, get_oper_name(source_p));
/*
* At this point we should be calling connect_server with a valid
* connect{} block and a valid port in the connect{} block
*/
if (server_connect(conf, source_p))
{
if (!ConfigServerHide.hide_server_ips && HasUMode(source_p, UMODE_ADMIN))
sendto_one_notice(source_p, &me, ":*** Connecting to %s[%s].%u",
conf->host, conf->name, conf->port);
else
sendto_one_notice(source_p, &me, ":*** Connecting to %s.%u",
conf->name, conf->port);
}
else
sendto_one_notice(source_p, &me, ":*** Couldn't connect to %s.%u",
conf->name, conf->port);
/*
* Client is either connecting with all the data it needs or has been
* destroyed
*/
return 0;
}
/*! \brief CONNECT command handler
*
* \param source_p Pointer to allocated Client struct from which the message
* originally comes from. This can be a local or remote client.
* \param parc Integer holding the number of supplied arguments.
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
* pointers.
* \note Valid arguments for this command are:
* - parv[0] = command
* - parv[1] = target server
* - parv[2] = unused/ignored
* - parv[3] = nickname/servername
*/
static int
ms_connect(struct Client *source_p, int parc, char *parv[])
{
const char *const name = parv[1];
if (parc < 4 || EmptyString(parv[3]))
{
sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "CONNECT");
return 0;
}
if (server_hunt(source_p, ":%s CONNECT %s %s :%s", 3, parc, parv)->ret != HUNTED_ISME)
return 0;
/*
* Try to find the name. If it fails, notify and bail.
*/
struct MaskItem *conf;
if ((conf = connect_find(name, match)) == NULL)
{
sendto_one_notice(source_p, &me, ":Connect: Server %s not listed in configuration file", name);
return 0;
}
const struct Client *target_p;
if ((target_p = hash_find_server(conf->name)))
{
sendto_one_notice(source_p, &me, ":Connect: Server %s already exists from %s",
target_p->name, target_p->from->name);
return 0;
}
if (find_servconn_in_progress(conf->name))
{
sendto_one_notice(source_p, &me, ":Connect: a connection to %s is already in progress",
conf->name);
return 0;
}
/*
* Notify all operators about remote connect requests
*/
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_GLOBAL, "from %s: Remote CONNECT %s %u from %s",
me.name, name, conf->port, get_oper_name(source_p));
sendto_server(NULL, 0, 0, ":%s GLOBOPS :Remote CONNECT %s %u from %s",
me.id, name, conf->port, get_oper_name(source_p));
ilog(LOG_TYPE_IRCD, "Remote CONNECT %s %u from %s",
name, conf->port, get_oper_name(source_p));
/*
* At this point we should be calling connect_server with a valid
* connect{} block and a valid port in the connect{} block
*/
if (server_connect(conf, source_p))
sendto_one_notice(source_p, &me, ":*** Connecting to %s.%u",
conf->name, conf->port);
else
sendto_one_notice(source_p, &me, ":*** Couldn't connect to %s.%u",
conf->name, conf->port);
/*
* Client is either connecting with all the data it needs or has been
* destroyed
*/
return 0;
}
static struct Message connect_msgtab =
{
.cmd = "CONNECT",
.args_min = 2,
.args_max = MAXPARA,
.handlers[UNREGISTERED_HANDLER] = m_unregistered,
.handlers[CLIENT_HANDLER] = m_not_oper,
.handlers[SERVER_HANDLER] = ms_connect,
.handlers[ENCAP_HANDLER] = m_ignore,
.handlers[OPER_HANDLER] = mo_connect
};
static void
module_init(void)
{
mod_add_cmd(&connect_msgtab);
}
static void
module_exit(void)
{
mod_del_cmd(&connect_msgtab);
}
struct module module_entry =
{
.version = "$Revision: 8430 $",
.modinit = module_init,
.modexit = module_exit,
};
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