--- /dev/null
+/*
+ * IRC - Internet Relay Chat, ircd/s_serv.c (formerly ircd/s_msg.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.
+ */
+/** @file
+ * @brief Miscellaneous server support functions.
+ * @version $Id$
+ */
+#include "config.h"
+
+#include "s_serv.h"
+#include "IPcheck.h"
+#include "channel.h"
+#include "client.h"
+#include "gline.h"
+#include "hash.h"
+#include "ircd.h"
+#include "ircd_alloc.h"
+#include "ircd_log.h"
+#include "ircd_reply.h"
+#include "ircd_string.h"
+#include "ircd_snprintf.h"
+#include "ircd_crypt.h"
+#include "jupe.h"
+#include "list.h"
+#include "match.h"
+#include "msg.h"
+#include "msgq.h"
+#include "numeric.h"
+#include "numnicks.h"
+#include "parse.h"
+#include "querycmds.h"
+#include "s_bsd.h"
+#include "s_conf.h"
+#include "s_debug.h"
+#include "s_misc.h"
+#include "s_user.h"
+#include "send.h"
+#include "struct.h"
+#include "sys.h"
+#include "userload.h"
+
+/* #include <assert.h> -- Now using assert in ircd_log.h */
+#include <stdlib.h>
+#include <string.h>
+
+/** Maximum connection count since last restart. */
+unsigned int max_connection_count = 0;
+/** Maximum (local) client count since last restart. */
+unsigned int max_client_count = 0;
+
+/** Squit a new (pre-burst) server.
+ * @param cptr Local client that tried to introduce the server.
+ * @param sptr Server to disconnect.
+ * @param host Name of server being disconnected.
+ * @param timestamp Link time of server being disconnected.
+ * @param pattern Format string for squit message.
+ * @return CPTR_KILLED if cptr == sptr, else 0.
+ */
+int exit_new_server(struct Client *cptr, struct Client *sptr, const char *host,
+ time_t timestamp, const char *pattern, ...)
+{
+ struct VarData vd;
+ int retval = 0;
+
+ vd.vd_format = pattern;
+ va_start(vd.vd_args, pattern);
+
+ if (!IsServer(sptr))
+ retval = vexit_client_msg(cptr, cptr, &me, pattern, vd.vd_args);
+ else
+ sendcmdto_one(&me, CMD_SQUIT, cptr, "%s %Tu :%v", host, timestamp, &vd);
+
+ va_end(vd.vd_args);
+
+ return retval;
+}
+
+/** Indicate whether \a a is between \a b and #me (that is, \a b would
+ * be killed if \a a squits).
+ * @param a A server that may be between us and \a b.
+ * @param b A client that may be on the far side of \a a.
+ * @return Non-zero if \a a is between \a b and #me.
+ */
+int a_kills_b_too(struct Client *a, struct Client *b)
+{
+ for (; b != a && b != &me; b = cli_serv(b)->up);
+ return (a == b ? 1 : 0);
+}
+
+/** Handle a connection that has sent a valid PASS and SERVER.
+ * @param cptr New peer server.
+ * @param aconf Connect block for \a cptr.
+ * @return Zero.
+ */
+int server_estab(struct Client *cptr, struct ConfItem *aconf)
+{
+ struct Client* acptr = 0;
+ const char* inpath;
+ int i;
+
+ assert(0 != cptr);
+ assert(0 != cli_local(cptr));
+
+ inpath = cli_name(cptr);
+
+ if (IsUnknown(cptr)) {
+ if (aconf->passwd[0])
+ sendrawto_one(cptr, MSG_PASS " :%s", aconf->passwd);
+ /*
+ * Pass my info to the new server
+ */
+ sendrawto_one(cptr, MSG_SERVER " %s 1 %Tu %Tu J%s %s%s +%s6 :%s",
+ cli_name(&me), cli_serv(&me)->timestamp,
+ cli_serv(cptr)->timestamp, MAJOR_PROTOCOL, NumServCap(&me),
+ feature_bool(FEAT_HUB) ? "h" : "",
+ *(cli_info(&me)) ? cli_info(&me) : "IRCers United");
+ }
+
+ det_confs_butmask(cptr, CONF_SERVER | CONF_UWORLD);
+
+ if (!IsHandshake(cptr))
+ hAddClient(cptr);
+ SetServer(cptr);
+ cli_handler(cptr) = SERVER_HANDLER;
+ Count_unknownbecomesserver(UserStats);
+ SetBurst(cptr);
+
+/* nextping = CurrentTime; */
+
+ /*
+ * NOTE: check for acptr->user == cptr->serv->user is necessary to insure
+ * that we got the same one... bleah
+ */
+ if (cli_serv(cptr)->user && *(cli_serv(cptr))->by &&
+ (acptr = findNUser(cli_serv(cptr)->by))) {
+ if (cli_user(acptr) == cli_serv(cptr)->user) {
+ sendcmdto_one(&me, CMD_NOTICE, acptr, "%C :Link with %s established.",
+ acptr, inpath);
+ }
+ else {
+ /*
+ * if not the same client, set by to empty string
+ */
+ acptr = 0;
+ *(cli_serv(cptr))->by = '\0';
+ }
+ }
+
+ sendto_opmask_butone(acptr, SNO_OLDSNO, "Link with %s established.", inpath);
+ cli_serv(cptr)->up = &me;
+ cli_serv(cptr)->updown = add_dlink(&(cli_serv(&me))->down, cptr);
+ sendto_opmask_butone(0, SNO_NETWORK, "Net junction: %s %s", cli_name(&me),
+ cli_name(cptr));
+ SetJunction(cptr);
+ /*
+ * Old sendto_serv_but_one() call removed because we now
+ * need to send different names to different servers
+ * (domain name matching) Send new server to other servers.
+ */
+ for (i = 0; i <= HighestFd; i++)
+ {
+ if (!(acptr = LocalClientArray[i]) || !IsServer(acptr) ||
+ acptr == cptr || IsMe(acptr))
+ continue;
+ if (!match(cli_name(&me), cli_name(cptr)))
+ continue;
+ sendcmdto_one(&me, CMD_SERVER, acptr,
+ "%s 2 0 %Tu J%02u %s%s +%s%s%s :%s", cli_name(cptr),
+ cli_serv(cptr)->timestamp, Protocol(cptr), NumServCap(cptr),
+ IsHub(cptr) ? "h" : "", IsService(cptr) ? "s" : "",
+ IsIPv6(cptr) ? "6" : "", cli_info(cptr));
+ }
+
+ /* Send these as early as possible so that glined users/juped servers can
+ * be removed from the network while the remote server is still chewing
+ * our burst.
+ */
+ gline_burst(cptr);
+ jupe_burst(cptr);
+
+ /*
+ * Pass on my client information to the new server
+ *
+ * First, pass only servers (idea is that if the link gets
+ * canceled because the server was already there,
+ * there are no NICK's to be canceled...). Of course,
+ * if cancellation occurs, all this info is sent anyway,
+ * and I guess the link dies when a read is attempted...? --msa
+ *
+ * Note: Link cancellation to occur at this point means
+ * that at least two servers from my fragment are building
+ * up connection this other fragment at the same time, it's
+ * a race condition, not the normal way of operation...
+ */
+
+ for (acptr = &me; acptr; acptr = cli_prev(acptr)) {
+ /* acptr->from == acptr for acptr == cptr */
+ if (cli_from(acptr) == cptr)
+ continue;
+ if (IsServer(acptr)) {
+ const char* protocol_str;
+
+ if (Protocol(acptr) > 9)
+ protocol_str = IsBurst(acptr) ? "J" : "P";
+ else
+ protocol_str = IsBurst(acptr) ? "J0" : "P0";
+
+ if (0 == match(cli_name(&me), cli_name(acptr)))
+ continue;
+ sendcmdto_one(cli_serv(acptr)->up, CMD_SERVER, cptr,
+ "%s %d 0 %Tu %s%u %s%s +%s%s%s :%s", cli_name(acptr),
+ cli_hopcount(acptr) + 1, cli_serv(acptr)->timestamp,
+ protocol_str, Protocol(acptr), NumServCap(acptr),
+ IsHub(acptr) ? "h" : "", IsService(acptr) ? "s" : "",
+ IsIPv6(acptr) ? "6" : "", cli_info(acptr));
+ }
+ }
+
+ for (acptr = &me; acptr; acptr = cli_prev(acptr))
+ {
+ /* acptr->from == acptr for acptr == cptr */
+ if (cli_from(acptr) == cptr)
+ continue;
+ if (IsUser(acptr))
+ {
+ char xxx_buf[25];
+ char *s = umode_str(acptr);
+ sendcmdto_one(cli_user(acptr)->server, CMD_NICK, cptr,
+ "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
+ cli_name(acptr), cli_hopcount(acptr) + 1, cli_lastnick(acptr),
+ cli_user(acptr)->username, cli_user(acptr)->realhost,
+ *s ? "+" : "", s, *s ? " " : "",
+ iptobase64(xxx_buf, &cli_ip(acptr), sizeof(xxx_buf), IsIPv6(cptr)),
+ NumNick(acptr), cli_info(acptr));
+ }
+ }
+ /*
+ * Last, send the BURST.
+ * (Or for 2.9 servers: pass all channels plus statuses)
+ */
+ {
+ struct Channel *chptr;
+ for (chptr = GlobalChannelList; chptr; chptr = chptr->next)
+ send_channel_modes(cptr, chptr);
+ }
+ sendcmdto_one(&me, CMD_END_OF_BURST, cptr, "");
+ return 0;
+}
+
projects / ircu2.10.12-pk.git / blobdiff