X-Git-Url: http://git.pk910.de/?p=ircu2.10.12-pk.git;a=blobdiff_plain;f=ircd%2Fm_connect.c;fp=ircd%2Fm_connect.c;h=ca4856d9d829bef15145e423787fb49ebaf0dbf0;hp=0000000000000000000000000000000000000000;hb=0400a5a6479398d82526785c18c0df8bc8b92dce;hpb=d17e10da972ce5776c60b4c317267c6abe0e1ead diff --git a/ircd/m_connect.c b/ircd/m_connect.c new file mode 100644 index 0000000..ca4856d --- /dev/null +++ b/ircd/m_connect.c @@ -0,0 +1,343 @@ +/* + * IRC - Internet Relay Chat, ircd/m_connect.c + * Copyright (C) 1990 Jarkko Oikarinen and + * University of Oulu, Computing Center + * + * See file AUTHORS in IRC package for additional names of + * the programmers. + * + * 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 1, 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., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * $Id$ + */ + +/* + * m_functions execute protocol messages on this server: + * + * cptr is always NON-NULL, pointing to a *LOCAL* client + * structure (with an open socket connected!). This + * identifies the physical socket where the message + * originated (or which caused the m_function to be + * executed--some m_functions may call others...). + * + * sptr is the source of the message, defined by the + * prefix part of the message if present. If not + * or prefix not found, then sptr==cptr. + * + * (!IsServer(cptr)) => (cptr == sptr), because + * prefixes are taken *only* from servers... + * + * (IsServer(cptr)) + * (sptr == cptr) => the message didn't + * have the prefix. + * + * (sptr != cptr && IsServer(sptr) means + * the prefix specified servername. (?) + * + * (sptr != cptr && !IsServer(sptr) means + * that message originated from a remote + * user (not local). + * + * combining + * + * (!IsServer(sptr)) means that, sptr can safely + * taken as defining the target structure of the + * message in this server. + * + * *Always* true (if 'parse' and others are working correct): + * + * 1) sptr->from == cptr (note: cptr->from == cptr) + * + * 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr + * *cannot* be a local connection, unless it's + * actually cptr!). [MyConnect(x) should probably + * be defined as (x == x->from) --msa ] + * + * parc number of variable parameter strings (if zero, + * parv is allowed to be NULL) + * + * parv a NULL terminated list of parameter pointers, + * + * parv[0], sender (prefix string), if not present + * this points to an empty string. + * parv[1]...parv[parc-1] + * pointers to additional parameters + * parv[parc] == NULL, *always* + * + * note: it is guaranteed that parv[0]..parv[parc-1] are all + * non-NULL pointers. + */ +#include "config.h" + +#include "client.h" +#include "crule.h" +#include "hash.h" +#include "ircd.h" +#include "ircd_features.h" +#include "ircd_log.h" +#include "ircd_reply.h" +#include "ircd_string.h" +#include "jupe.h" +#include "match.h" +#include "msg.h" +#include "numeric.h" +#include "numnicks.h" +#include "s_bsd.h" +#include "s_conf.h" +#include "s_user.h" +#include "send.h" + +/* #include -- Now using assert in ircd_log.h */ +#include + +/* + * ms_connect - server message handler + * - Added by Jto 11 Feb 1989 + * + * parv[0] = sender prefix + * parv[1] = servername + * parv[2] = port number + * parv[3] = remote server + */ +int ms_connect(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) +{ + unsigned short port; + unsigned short tmpport; + const char* rule; + struct ConfItem* aconf; + struct Client* acptr; + struct Jupe* ajupe; + + assert(0 != cptr); + assert(0 != sptr); + + if (!IsPrivileged(sptr)) + return send_reply(sptr, ERR_NOPRIVILEGES); + + if (parc < 4) { + /* + * this is coming from a server which should have already + * checked it's args, if we don't have parc == 4, something + * isn't right. + */ + protocol_violation(sptr, "Too few parameters to connect"); + return need_more_params(sptr, "CONNECT"); + } + + if (hunt_server_cmd(sptr, CMD_CONNECT, cptr, 1, "%s %s :%C", 3, parc, parv) + != HUNTED_ISME) + return 0; + + /* + * need to find the conf entry first so we can use the server name from + * the conf entry instead of parv[1] to find out if the server is already + * present below. --Bleep + */ + if (0 == (aconf = conf_find_server(parv[1]))) { + sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Host %s not listed " + "in ircd.conf", sptr, parv[1]); + return 0; + } + /* + * use aconf->name to look up the server + */ + if ((acptr = FindServer(aconf->name))) { + sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Server %s already " + "exists from %s", sptr, parv[1], cli_name(cli_from(acptr))); + return 0; + } + /* + * Evaluate connection rules... If no rules found, allow the + * connect. Otherwise stop with the first true rule (ie: rules + * are ored together. Oper connects are effected only by D + * lines (CRULEALL) not d lines (CRULEAUTO). + */ + if ((rule = conf_eval_crule(aconf->name, CRULE_ALL))) { + sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Disallowed by rule: %s", sptr, rule); + return 0; + } + /* + * Check to see if the server is juped; if it is, disallow the connect + */ + if ((ajupe = jupe_find(aconf->name)) && JupeIsActive(ajupe)) { + sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Server %s is juped: %s", + sptr, JupeServer(ajupe), JupeReason(ajupe)); + return 0; + } + + /* + * Allow opers to /connect foo.* 0 bah.* to connect foo and bah + * using the conf's configured port + */ + port = atoi(parv[2]); + /* + * save the old port + */ + tmpport = aconf->address.port; + if (port) + aconf->address.port = port; + else + port = aconf->address.port; + + /* + * Notify all operators about remote connect requests + */ + sendwallto_group_butone(&me, WALL_WALLOPS, 0, + "Remote CONNECT %s %s from %s", parv[1], + parv[2] ? parv[2] : "", + get_client_name(sptr, HIDE_IP)); + log_write(LS_NETWORK, L_INFO, 0, "CONNECT From %C : %s %s", sptr, parv[1], + parv[2] ? parv[2] : ""); + + if (connect_server(aconf, sptr)) { + sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :*** Connecting to %s.", sptr, + aconf->name); + } + else { + sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :*** Connection to %s failed", + sptr, aconf->name); + } + aconf->address.port = tmpport; + return 0; +} + +/* + * mo_connect - oper message handler + * - Added by Jto 11 Feb 1989 + * + * parv[0] = sender prefix + * parv[1] = servername + * parv[2] = port number + * parv[3] = remote server + */ +int mo_connect(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) +{ + unsigned short port; + unsigned short tmpport; + const char* rule; + struct ConfItem* aconf; + struct Client* acptr; + struct Jupe* ajupe; + + assert(0 != cptr); + assert(cptr == sptr); + assert(IsAnOper(sptr)); + + if (parc < 2) + return need_more_params(sptr, "CONNECT"); + + if (parc > 3) { + /* + * if parc > 3, we are trying to connect two remote + * servers to each other + */ + if (IsLocOp(sptr)) { + /* + * Only allow LocOps to make local CONNECTS --SRB + */ + return send_reply(cptr, ERR_NOPRIVILEGES); + } + else { + struct Client* acptr2; + struct Client* acptr3; + + if (!(acptr3 = find_match_server(parv[3]))) { + return send_reply(sptr, ERR_NOSUCHSERVER, parv[3]); + } + + /* + * Look for closest matching server + * needed for "/connect blah 4400 *"? + */ + for (acptr2 = acptr3; acptr2 != &me; acptr2 = cli_serv(acptr2)->up) { + if (!match(parv[3], cli_name(acptr2))) + acptr3 = acptr2; + } + parv[3] = cli_name(acptr3); + if (hunt_server_cmd(sptr, CMD_CONNECT, cptr, 1, "%s %s :%C", 3, parc, + parv) != HUNTED_ISME) + return 0; + } + } + /* + * need to find the conf entry first so we can use the server name from + * the conf entry instead of parv[1] to find out if the server is already + * present below. --Bleep + */ + if (0 == (aconf = conf_find_server(parv[1]))) { + sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Host %s not listed " + "in ircd.conf", sptr, parv[1]); + return 0; + } + /* + * use aconf->name to look up the server, see above + */ + if ((acptr = FindServer(aconf->name))) { + sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Server %s already " + "exists from %s", sptr, parv[1], cli_name(cli_from(acptr))); + return 0; + } + /* + * Evaluate connection rules... If no rules found, allow the + * connect. Otherwise stop with the first true rule (ie: rules + * are ored together. Oper connects are effected only by D + * lines (CRULEALL) not d lines (CRULEAUTO). + */ + if ((rule = conf_eval_crule(aconf->name, CRULE_ALL))) { + sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Disallowed by rule: %s", sptr, rule); + return 0; + } + /* + * Check to see if the server is juped; if it is, disallow the connect + */ + if ((ajupe = jupe_find(aconf->name)) && JupeIsActive(ajupe)) { + sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Server %s is juped: %s", + sptr, JupeServer(ajupe), JupeReason(ajupe)); + return 0; + } + /* + * Get port number from user, if given. If not specified, + * use the default from configuration structure. If missing + * from there, then use the precompiled default. + */ + port = aconf->address.port; + if (parc > 2) { + assert(0 != parv[2]); + if (0 == (port = atoi(parv[2]))) { + sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Invalid port number", + sptr); + return 0; + } + } + if (0 == port && 0 == (port = feature_int(FEAT_SERVER_PORT))) { + sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: missing port number", + sptr); + return 0; + } + + tmpport = aconf->address.port; + aconf->address.port = port; + + if (connect_server(aconf, sptr)) { + sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :*** Connecting to %s.", sptr, + aconf->name); + } + else { + sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :*** Connection to %s failed", + sptr, aconf->name); + } + aconf->address.port = tmpport; + return 0; +}