--- /dev/null
+/*
+ * 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 <assert.h> -- Now using assert in ircd_log.h */
+#include <stdlib.h>
+
+/*
+ * 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;
+}
projects / ircu2.10.12-pk.git / blobdiff