--- /dev/null
+/*
+ * IRC - Internet Relay Chat, ircd/m_server.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 Handlers for the SERVER command.
+ * @version $Id$
+ */
+
+#include "config.h"
+
+#include "client.h"
+#include "hash.h"
+#include "ircd.h"
+#include "ircd_log.h"
+#include "ircd_features.h"
+#include "ircd_reply.h"
+#include "ircd_string.h"
+#include "jupe.h"
+#include "list.h"
+#include "match.h"
+#include "msg.h"
+#include "numeric.h"
+#include "numnicks.h"
+#include "querycmds.h"
+#include "s_bsd.h"
+#include "s_conf.h"
+#include "s_debug.h"
+#include "s_misc.h"
+#include "s_serv.h"
+#include "send.h"
+#include "userload.h"
+
+/* #include <assert.h> -- Now using assert in ircd_log.h */
+#include <stdlib.h>
+#include <string.h>
+
+/** Clean up a server name.
+ * @param[in] host Input server name.
+ * @return NULL if the name is invalid, else pointer to cleaned-up name.
+ */
+static char *
+clean_servername(char *host)
+{
+ char* ch;
+ /*
+ * Check for "FRENCH " infection ;-) (actually this should
+ * be replaced with routine to check the hostname syntax in
+ * general). [ This check is still needed, even after the parse
+ * is fixed, because someone can send "SERVER :foo bar " ].
+ * Also, changed to check other "difficult" characters, now
+ * that parse lets all through... --msa
+ */
+ if (strlen(host) > HOSTLEN)
+ host[HOSTLEN] = '\0';
+
+ for (ch = host; *ch; ch++)
+ if (*ch <= ' ' || *ch > '~')
+ break;
+ if (*ch || !strchr(host, '.') || strlen(host) > HOSTLEN)
+ return NULL;
+ return host;
+}
+
+/** Parse protocol version from a string.
+ * @param[in] proto String version of protocol number.
+ * @return Zero if \a proto is unrecognized, else protocol version.
+ */
+static unsigned short
+parse_protocol(const char *proto)
+{
+ unsigned short prot;
+ if (strlen(proto) != 3 || (proto[0] != 'P' && proto[0] != 'J'))
+ return 0;
+ prot = atoi(proto+1);
+ if (prot > atoi(MAJOR_PROTOCOL))
+ prot = atoi(MAJOR_PROTOCOL);
+ return prot;
+}
+
+/** Reason not to accept a server's new announcement. */
+enum lh_type {
+ ALLOWED, /**< The new server link is accepted. */
+ MAX_HOPS_EXCEEDED, /**< The path to the server is too long. */
+ NOT_ALLOWED_TO_HUB, /**< My peer is not allowed to hub for the server. */
+ I_AM_NOT_HUB /**< I have another active server link but not FEAT_HUB. */
+};
+
+/** Check whether the introduction of a new server would cause a loop
+ * or be disallowed by leaf and hub configuration directives.
+ * @param[in] cptr Neighbor who sent the message.
+ * @param[in] sptr Client that originated the message.
+ * @param[out] ghost If non-NULL, receives ghost timestamp for new server.
+ * @param[in] host Name of new server.
+ * @param[in] numnick Numnick mask of new server.
+ * @param[in] timestamp Claimed link timestamp of new server.
+ * @param[in] hop Number of hops to the new server.
+ * @param[in] junction Non-zero if the new server is still bursting.
+ * @return CPTR_KILLED if \a cptr was SQUIT. 0 if some other server
+ * was SQUIT. 1 if the new server is allowed.
+ */
+static int
+check_loop_and_lh(struct Client* cptr, struct Client *sptr, time_t *ghost, const char *host, const char *numnick, time_t timestamp, int hop, int junction)
+{
+ struct Client* acptr;
+ struct Client* LHcptr = NULL;
+ struct ConfItem* lhconf;
+ enum lh_type active_lh_line = ALLOWED;
+ int ii;
+
+ if (ghost)
+ *ghost = 0;
+
+ /*
+ * Calculate type of connect limit and applicable config item.
+ */
+ lhconf = find_conf_byname(cli_confs(cptr), cli_name(cptr), CONF_SERVER);
+ assert(lhconf != NULL);
+ if (ghost)
+ {
+ if (!feature_bool(FEAT_HUB))
+ for (ii = 0; ii <= HighestFd; ii++)
+ if (LocalClientArray[ii] && IsServer(LocalClientArray[ii])) {
+ active_lh_line = I_AM_NOT_HUB;
+ break;
+ }
+ }
+ else if (hop > lhconf->maximum)
+ {
+ /* Because "maximum" should be 0 for non-hub links, check whether
+ * there is a hub mask -- if not, complain that the server isn't
+ * allowed to hub.
+ */
+ active_lh_line = lhconf->hub_limit ? MAX_HOPS_EXCEEDED : NOT_ALLOWED_TO_HUB;
+ }
+ else if (lhconf->hub_limit && match(lhconf->hub_limit, host))
+ {
+ struct Client *ac3ptr;
+ active_lh_line = NOT_ALLOWED_TO_HUB;
+ if (junction)
+ for (ac3ptr = sptr; ac3ptr != &me; ac3ptr = cli_serv(ac3ptr)->up)
+ if (IsJunction(ac3ptr)) {
+ LHcptr = ac3ptr;
+ break;
+ }
+ }
+
+ /*
+ * We want to find IsConnecting() and IsHandshake() too,
+ * use FindClient().
+ * The second finds collisions with numeric representation of existing
+ * servers - these shouldn't happen anymore when all upgraded to 2.10.
+ * -- Run
+ */
+ while ((acptr = FindClient(host))
+ || (numnick && (acptr = FindNServer(numnick))))
+ {
+ /*
+ * This link is trying feed me a server that I already have
+ * access through another path
+ *
+ * Do not allow Uworld to do this.
+ * Do not allow servers that are juped.
+ * Do not allow servers that have older link timestamps
+ * then this try.
+ * Do not allow servers that use the same numeric as an existing
+ * server, but have a different name.
+ *
+ * If my ircd.conf sucks, I can try to connect to myself:
+ */
+ if (acptr == &me)
+ return exit_client_msg(cptr, cptr, &me, "nick collision with me (%s), check server number in M:?", host);
+ /*
+ * Detect wrong numeric.
+ */
+ if (0 != ircd_strcmp(cli_name(acptr), host))
+ {
+ sendcmdto_serv_butone(&me, CMD_WALLOPS, cptr,
+ ":SERVER Numeric Collision: %s != %s",
+ cli_name(acptr), host);
+ return exit_client_msg(cptr, cptr, &me,
+ "NUMERIC collision between %s and %s."
+ " Is your server numeric correct ?", host, cli_name(acptr));
+ }
+ /*
+ * Kill our try, if we had one.
+ */
+ if (IsConnecting(acptr))
+ {
+ if (active_lh_line == ALLOWED && exit_client(cptr, acptr, &me,
+ "Just connected via another link") == CPTR_KILLED)
+ return CPTR_KILLED;
+ /*
+ * We can have only ONE 'IsConnecting', 'IsHandshake' or
+ * 'IsServer', because new 'IsConnecting's are refused to
+ * the same server if we already had it.
+ */
+ break;
+ }
+ /*
+ * Avoid other nick collisions...
+ * This is a doubtful test though, what else would it be
+ * when it has a server.name ?
+ */
+ else if (!IsServer(acptr) && !IsHandshake(acptr))
+ return exit_client_msg(cptr, cptr, &me,
+ "Nickname %s already exists!", host);
+ /*
+ * Our new server might be a juped server,
+ * or someone trying abuse a second Uworld:
+ */
+ else if (IsServer(acptr) && (0 == ircd_strncmp(cli_info(acptr), "JUPE", 4) ||
+ find_conf_byhost(cli_confs(cptr), cli_name(acptr), CONF_UWORLD)))
+ {
+ if (!IsServer(sptr))
+ return exit_client(cptr, sptr, &me, cli_info(acptr));
+ sendcmdto_serv_butone(&me, CMD_WALLOPS, cptr,
+ ":Received :%s SERVER %s from %s !?!",
+ NumServ(cptr), host, cli_name(cptr));
+ return exit_new_server(cptr, sptr, host, timestamp, "%s", cli_info(acptr));
+ }
+ /*
+ * Of course we find the handshake this link was before :)
+ */
+ else if (IsHandshake(acptr) && acptr == cptr)
+ break;
+ /*
+ * Here we have a server nick collision...
+ * We don't want to kill the link that was last /connected,
+ * but we neither want to kill a good (old) link.
+ * Therefor we kill the second youngest link.
+ */
+ if (1)
+ {
+ struct Client* c2ptr = 0;
+ struct Client* c3ptr = acptr;
+ struct Client* ac2ptr;
+ struct Client* ac3ptr;
+
+ /* Search youngest link: */
+ for (ac3ptr = acptr; ac3ptr != &me; ac3ptr = cli_serv(ac3ptr)->up)
+ if (cli_serv(ac3ptr)->timestamp > cli_serv(c3ptr)->timestamp)
+ c3ptr = ac3ptr;
+ if (IsServer(sptr))
+ {
+ for (ac3ptr = sptr; ac3ptr != &me; ac3ptr = cli_serv(ac3ptr)->up)
+ if (cli_serv(ac3ptr)->timestamp > cli_serv(c3ptr)->timestamp)
+ c3ptr = ac3ptr;
+ }
+ if (timestamp > cli_serv(c3ptr)->timestamp)
+ {
+ c3ptr = 0;
+ c2ptr = acptr; /* Make sure they differ */
+ }
+ /* Search second youngest link: */
+ for (ac2ptr = acptr; ac2ptr != &me; ac2ptr = cli_serv(ac2ptr)->up)
+ if (ac2ptr != c3ptr &&
+ cli_serv(ac2ptr)->timestamp >
+ (c2ptr ? cli_serv(c2ptr)->timestamp : timestamp))
+ c2ptr = ac2ptr;
+ if (IsServer(sptr))
+ {
+ for (ac2ptr = sptr; ac2ptr != &me; ac2ptr = cli_serv(ac2ptr)->up)
+ if (ac2ptr != c3ptr &&
+ cli_serv(ac2ptr)->timestamp >
+ (c2ptr ? cli_serv(c2ptr)->timestamp : timestamp))
+ c2ptr = ac2ptr;
+ }
+ if (c3ptr && timestamp > (c2ptr ? cli_serv(c2ptr)->timestamp : timestamp))
+ c2ptr = 0;
+ /* If timestamps are equal, decide which link to break
+ * by name.
+ */
+ if ((c2ptr ? cli_serv(c2ptr)->timestamp : timestamp) ==
+ (c3ptr ? cli_serv(c3ptr)->timestamp : timestamp))
+ {
+ const char *n2, *n2up, *n3, *n3up;
+ if (c2ptr)
+ {
+ n2 = cli_name(c2ptr);
+ n2up = MyConnect(c2ptr) ? cli_name(&me) : cli_name(cli_serv(c2ptr)->up);
+ }
+ else
+ {
+ n2 = host;
+ n2up = IsServer(sptr) ? cli_name(sptr) : cli_name(&me);
+ }
+ if (c3ptr)
+ {
+ n3 = cli_name(c3ptr);
+ n3up = MyConnect(c3ptr) ? cli_name(&me) : cli_name(cli_serv(c3ptr)->up);
+ }
+ else
+ {
+ n3 = host;
+ n3up = IsServer(sptr) ? cli_name(sptr) : cli_name(&me);
+ }
+ if (strcmp(n2, n2up) > 0)
+ n2 = n2up;
+ if (strcmp(n3, n3up) > 0)
+ n3 = n3up;
+ if (strcmp(n3, n2) > 0)
+ {
+ ac2ptr = c2ptr;
+ c2ptr = c3ptr;
+ c3ptr = ac2ptr;
+ }
+ }
+ /* Now squit the second youngest link: */
+ if (!c2ptr)
+ return exit_new_server(cptr, sptr, host, timestamp,
+ "server %s already exists and is %ld seconds younger.",
+ host, (long)cli_serv(acptr)->timestamp - (long)timestamp);
+ else if (cli_from(c2ptr) == cptr || IsServer(sptr))
+ {
+ struct Client *killedptrfrom = cli_from(c2ptr);
+ if (active_lh_line != ALLOWED)
+ {
+ /*
+ * If the L: or H: line also gets rid of this link,
+ * we sent just one squit.
+ */
+ if (LHcptr && a_kills_b_too(LHcptr, c2ptr))
+ break;
+ /*
+ * If breaking the loop here solves the L: or H:
+ * line problem, we don't squit that.
+ */
+ if (cli_from(c2ptr) == cptr || (LHcptr && a_kills_b_too(c2ptr, LHcptr)))
+ active_lh_line = ALLOWED;
+ else
+ {
+ /*
+ * If we still have a L: or H: line problem,
+ * we prefer to squit the new server, solving
+ * loop and L:/H: line problem with only one squit.
+ */
+ LHcptr = 0;
+ break;
+ }
+ }
+ /*
+ * If the new server was introduced by a server that caused a
+ * Ghost less then 20 seconds ago, this is probably also
+ * a Ghost... (20 seconds is more then enough because all
+ * SERVER messages are at the beginning of a net.burst). --Run
+ */
+ if (CurrentTime - cli_serv(cptr)->ghost < 20)
+ {
+ killedptrfrom = cli_from(acptr);
+ if (exit_client(cptr, acptr, &me, "Ghost loop") == CPTR_KILLED)
+ return CPTR_KILLED;
+ }
+ else if (exit_client_msg(cptr, c2ptr, &me,
+ "Loop <-- %s (new link is %ld seconds younger)", host,
+ (c3ptr ? (long)cli_serv(c3ptr)->timestamp : timestamp) -
+ (long)cli_serv(c2ptr)->timestamp) == CPTR_KILLED)
+ return CPTR_KILLED;
+ /*
+ * Did we kill the incoming server off already ?
+ */
+ if (killedptrfrom == cptr)
+ return 0;
+ }
+ else
+ {
+ if (active_lh_line != ALLOWED)
+ {
+ if (LHcptr && a_kills_b_too(LHcptr, acptr))
+ break;
+ if (cli_from(acptr) == cptr || (LHcptr && a_kills_b_too(acptr, LHcptr)))
+ active_lh_line = ALLOWED;
+ else
+ {
+ LHcptr = 0;
+ break;
+ }
+ }
+ /*
+ * We can't believe it is a lagged server message
+ * when it directly connects to us...
+ * kill the older link at the ghost, rather then
+ * at the second youngest link, assuming it isn't
+ * a REAL loop.
+ */
+ if (ghost)
+ *ghost = CurrentTime; /* Mark that it caused a ghost */
+ if (exit_client(cptr, acptr, &me, "Ghost") == CPTR_KILLED)
+ return CPTR_KILLED;
+ break;
+ }
+ }
+ }
+
+ if (active_lh_line != ALLOWED)
+ {
+ if (!LHcptr)
+ LHcptr = sptr;
+ if (active_lh_line == MAX_HOPS_EXCEEDED)
+ {
+ return exit_client_msg(cptr, LHcptr, &me,
+ "Maximum hops exceeded for %s at %s",
+ cli_name(cptr), host);
+ }
+ else if (active_lh_line == NOT_ALLOWED_TO_HUB)
+ {
+ return exit_client_msg(cptr, LHcptr, &me,
+ "%s is not allowed to hub for %s",
+ cli_name(cptr), host);
+ }
+ else /* I_AM_NOT_HUB */
+ {
+ ServerStats->is_ref++;
+ return exit_client(cptr, LHcptr, &me, "I'm a leaf, define the HUB feature");
+ }
+ }
+
+ return 1;
+}
+
+/** Update server start timestamps and TS offsets.
+ * @param[in] cptr Server that just connected.
+ * @param[in] timestamp Current time according to \a cptr.
+ * @param[in] start_timestamp Time that \a cptr started.
+ * @param[in] recv_time Current time as we know it.
+ */
+static void
+check_start_timestamp(struct Client *cptr, time_t timestamp, time_t start_timestamp, time_t recv_time)
+{
+ Debug((DEBUG_DEBUG, "My start time: %Tu; other's start time: %Tu",
+ cli_serv(&me)->timestamp, start_timestamp));
+ Debug((DEBUG_DEBUG, "Receive time: %Tu; received timestamp: %Tu; "
+ "difference %ld", recv_time, timestamp, timestamp - recv_time));
+ if (feature_bool(FEAT_RELIABLE_CLOCK)) {
+ if (start_timestamp < cli_serv(&me)->timestamp)
+ cli_serv(&me)->timestamp = start_timestamp;
+ if (IsUnknown(cptr))
+ cli_serv(cptr)->timestamp = TStime();
+ } else if (start_timestamp < cli_serv(&me)->timestamp) {
+ sendto_opmask_butone(0, SNO_OLDSNO, "got earlier start time: "
+ "%Tu < %Tu", start_timestamp,
+ cli_serv(&me)->timestamp);
+ cli_serv(&me)->timestamp = start_timestamp;
+ TSoffset += timestamp - recv_time;
+ sendto_opmask_butone(0, SNO_OLDSNO, "clock adjusted by adding %d",
+ (int)(timestamp - recv_time));
+ } else if ((start_timestamp > cli_serv(&me)->timestamp) &&
+ IsUnknown(cptr)) {
+ cli_serv(cptr)->timestamp = TStime();
+ } else if (timestamp != recv_time) {
+ /*
+ * Equal start times, we have a collision. Let the connected-to
+ * server decide. This assumes leafs issue more than half of the
+ * connection attempts.
+ */
+ if (IsUnknown(cptr))
+ cli_serv(cptr)->timestamp = TStime();
+ else if (IsHandshake(cptr)) {
+ sendto_opmask_butone(0, SNO_OLDSNO, "clock adjusted by adding %d",
+ (int)(timestamp - recv_time));
+ TSoffset += timestamp - recv_time;
+ }
+ }
+}
+
+/** Interpret a server's flags.
+ *
+ * @param[in] cptr New server structure.
+ * @param[in] flags String listing server's P10 flags.
+ */
+void set_server_flags(struct Client *cptr, const char *flags)
+{
+ while (*flags) switch (*flags++) {
+ case 'h': SetHub(cptr); break;
+ case 's': SetService(cptr); break;
+ case '6': SetIPv6(cptr); break;
+ }
+}
+
+/** Handle a SERVER message from an unregistered connection.
+ *
+ * \a parv has the following elements:
+ * \li \a parv[1] is the server name
+ * \li \a parv[2] is the hop count to the server
+ * \li \a parv[3] is the start timestamp for the server
+ * \li \a parv[4] is the link timestamp
+ * \li \a parv[5] is the protocol version (P10 or J10)
+ * \li \a parv[6] is the numnick mask for the server
+ * \li \a parv[7] is a string of flags like +hs to mark hubs and services
+ * \li \a parv[\a parc - 1] is the server description
+ *
+ * See @ref m_functions for discussion of the arguments.
+ * @param[in] cptr Client that sent us the message.
+ * @param[in] sptr Original source of message.
+ * @param[in] parc Number of arguments.
+ * @param[in] parv Argument vector.
+ */
+int mr_server(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
+{
+ char* host;
+ struct ConfItem* aconf;
+ struct Jupe* ajupe;
+ int hop;
+ int ret;
+ unsigned short prot;
+ time_t start_timestamp;
+ time_t timestamp;
+ time_t recv_time;
+ time_t ghost;
+
+ if (IsUserPort(cptr))
+ return exit_client_msg(cptr, cptr, &me,
+ "Cannot connect a server to a user port");
+
+ if (parc < 8)
+ {
+ need_more_params(sptr, "SERVER");
+ return exit_client(cptr, cptr, &me, "Need more parameters");
+ }
+ host = clean_servername(parv[1]);
+ if (!host)
+ {
+ sendto_opmask_butone(0, SNO_OLDSNO, "Bogus server name (%s) from %s",
+ host, cli_name(cptr));
+ return exit_client_msg(cptr, cptr, &me, "Bogus server name (%s)", host);
+ }
+
+ if ((ajupe = jupe_find(host)) && JupeIsActive(ajupe))
+ return exit_client_msg(cptr, sptr, &me, "Juped: %s", JupeReason(ajupe));
+
+ /* check connection rules */
+ if (0 != conf_eval_crule(host, CRULE_ALL)) {
+ ServerStats->is_ref++;
+ sendto_opmask_butone(0, SNO_OLDSNO, "Refused connection from %s.", cli_name(cptr));
+ return exit_client(cptr, cptr, &me, "Disallowed by connection rule");
+ }
+
+ log_write(LS_NETWORK, L_NOTICE, LOG_NOSNOTICE, "SERVER: %s %s[%s]", host,
+ cli_sockhost(cptr), cli_sock_ip(cptr));
+
+ /*
+ * Detect protocol
+ */
+ hop = atoi(parv[2]);
+ start_timestamp = atoi(parv[3]);
+ timestamp = atoi(parv[4]);
+ prot = parse_protocol(parv[5]);
+ if (!prot)
+ return exit_client_msg(cptr, sptr, &me, "Bogus protocol (%s)", parv[5]);
+ else if (prot < atoi(MINOR_PROTOCOL))
+ return exit_new_server(cptr, sptr, host, timestamp,
+ "Incompatible protocol: %s", parv[5]);
+
+ Debug((DEBUG_INFO, "Got SERVER %s with timestamp [%s] age %Tu (%Tu)",
+ host, parv[4], start_timestamp, cli_serv(&me)->timestamp));
+
+ if (timestamp < OLDEST_TS || start_timestamp < OLDEST_TS)
+ return exit_client_msg(cptr, sptr, &me,
+ "Bogus timestamps (%s %s)", parv[3], parv[4]);
+
+ /* If the server had a different name before, change it. */
+ if (!EmptyString(cli_name(cptr)) &&
+ (IsUnknown(cptr) || IsHandshake(cptr)) &&
+ 0 != ircd_strcmp(cli_name(cptr), host))
+ hChangeClient(cptr, host);
+ ircd_strncpy(cli_name(cptr), host, HOSTLEN);
+ ircd_strncpy(cli_info(cptr), parv[parc-1][0] ? parv[parc-1] : cli_name(&me), REALLEN);
+ cli_hopcount(cptr) = hop;
+
+ if (conf_check_server(cptr)) {
+ ++ServerStats->is_ref;
+ sendto_opmask_butone(0, SNO_OLDSNO, "Received unauthorized connection "
+ "from %s.", cli_name(cptr));
+ log_write(LS_NETWORK, L_NOTICE, LOG_NOSNOTICE, "Received unauthorized "
+ "connection from %C [%s]", cptr,
+ ircd_ntoa(&cli_ip(cptr)));
+ return exit_client(cptr, cptr, &me, "No Connect block");
+ }
+
+ host = cli_name(cptr);
+
+ update_load();
+
+ if (!(aconf = find_conf_byname(cli_confs(cptr), host, CONF_SERVER))) {
+ ++ServerStats->is_ref;
+ sendto_opmask_butone(0, SNO_OLDSNO, "Access denied. No conf line for "
+ "server %s", cli_name(cptr));
+ return exit_client_msg(cptr, cptr, &me,
+ "Access denied. No conf line for server %s", cli_name(cptr));
+ }
+
+ if (*aconf->passwd && !!strcmp(aconf->passwd, cli_passwd(cptr))) {
+ ++ServerStats->is_ref;
+ sendto_opmask_butone(0, SNO_OLDSNO, "Access denied (passwd mismatch) %s",
+ cli_name(cptr));
+ return exit_client_msg(cptr, cptr, &me,
+ "No Access (passwd mismatch) %s", cli_name(cptr));
+ }
+
+ memset(cli_passwd(cptr), 0, sizeof(cli_passwd(cptr)));
+
+ ret = check_loop_and_lh(cptr, sptr, &ghost, host, (parc > 7 ? parv[6] : NULL), timestamp, hop, 1);
+ if (ret != 1)
+ return ret;
+
+ make_server(cptr);
+ cli_serv(cptr)->timestamp = timestamp;
+ cli_serv(cptr)->prot = prot;
+ cli_serv(cptr)->ghost = ghost;
+ memset(cli_privs(cptr), 255, sizeof(struct Privs));
+ ClrPriv(cptr, PRIV_SET);
+ SetServerYXX(cptr, cptr, parv[6]);
+
+ /* Attach any necessary UWorld config items. */
+ attach_confs_byhost(cptr, host, CONF_UWORLD);
+
+ if (*parv[7] == '+')
+ set_server_flags(cptr, parv[7] + 1);
+
+ recv_time = TStime();
+ check_start_timestamp(cptr, timestamp, start_timestamp, recv_time);
+ ret = server_estab(cptr, aconf);
+
+ if (feature_bool(FEAT_RELIABLE_CLOCK) &&
+ abs(cli_serv(cptr)->timestamp - recv_time) > 30) {
+ sendto_opmask_butone(0, SNO_OLDSNO, "Connected to a net with a "
+ "timestamp-clock difference of %Td seconds! "
+ "Used SETTIME to correct this.",
+ timestamp - recv_time);
+ sendcmdto_prio_one(&me, CMD_SETTIME, cptr, "%Tu :%s", TStime(),
+ cli_name(&me));
+ }
+
+ return ret;
+}
+
+/** Handle a SERVER message from another server.
+ *
+ * \a parv has the following elements:
+ * \li \a parv[1] is the server name
+ * \li \a parv[2] is the hop count to the server
+ * \li \a parv[3] is the start timestamp for the server
+ * \li \a parv[4] is the link timestamp
+ * \li \a parv[5] is the protocol version (P10 or J10)
+ * \li \a parv[6] is the numnick mask for the server
+ * \li \a parv[7] is a string of flags like +hs to mark hubs and services
+ * \li \a parv[\a parc - 1] is the server description
+ *
+ * See @ref m_functions for discussion of the arguments.
+ * @param[in] cptr Client that sent us the message.
+ * @param[in] sptr Original source of message.
+ * @param[in] parc Number of arguments.
+ * @param[in] parv Argument vector.
+ */
+int ms_server(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
+{
+ int i;
+ char* host;
+ struct Client* acptr;
+ struct Client* bcptr;
+ int hop;
+ int ret;
+ unsigned short prot;
+ time_t start_timestamp;
+ time_t timestamp;
+
+ if (parc < 8)
+ {
+ return need_more_params(sptr, "SERVER");
+ return exit_client(cptr, cptr, &me, "Need more parameters");
+ }
+ host = clean_servername(parv[1]);
+ if (!host)
+ {
+ sendto_opmask_butone(0, SNO_OLDSNO, "Bogus server name (%s) from %s",
+ host, cli_name(cptr));
+ return exit_client_msg(cptr, cptr, &me, "Bogus server name (%s)", host);
+ }
+
+ /*
+ * Detect protocol
+ */
+ hop = atoi(parv[2]);
+ start_timestamp = atoi(parv[3]);
+ timestamp = atoi(parv[4]);
+ prot = parse_protocol(parv[5]);
+ if (!prot)
+ return exit_client_msg(cptr, sptr, &me, "Bogus protocol (%s)", parv[5]);
+ else if (prot < atoi(MINOR_PROTOCOL))
+ return exit_new_server(cptr, sptr, host, timestamp,
+ "Incompatible protocol: %s", parv[5]);
+
+ Debug((DEBUG_INFO, "Got SERVER %s with timestamp [%s] age %Tu (%Tu)",
+ host, parv[4], start_timestamp, cli_serv(&me)->timestamp));
+
+ if (timestamp < OLDEST_TS)
+ return exit_client_msg(cptr, sptr, &me,
+ "Bogus timestamps (%s %s)", parv[3], parv[4]);
+
+ if (parv[parc - 1][0] == '\0')
+ return exit_client_msg(cptr, cptr, &me,
+ "No server info specified for %s", host);
+
+ ret = check_loop_and_lh(cptr, sptr, NULL, host, (parc > 7 ? parv[6] : NULL), timestamp, hop, parv[5][0] == 'J');
+ if (ret != 1)
+ return ret;
+
+ /*
+ * Server is informing about a new server behind
+ * this link. Create REMOTE server structure,
+ * add it to list and propagate word to my other
+ * server links...
+ */
+
+ acptr = make_client(cptr, STAT_SERVER);
+ make_server(acptr);
+ cli_serv(acptr)->prot = prot;
+ cli_serv(acptr)->timestamp = timestamp;
+ cli_hopcount(acptr) = hop;
+ ircd_strncpy(cli_name(acptr), host, HOSTLEN);
+ ircd_strncpy(cli_info(acptr), parv[parc-1], REALLEN);
+ cli_serv(acptr)->up = sptr;
+ cli_serv(acptr)->updown = add_dlink(&(cli_serv(sptr))->down, acptr);
+ /* Use cptr, because we do protocol 9 -> 10 translation
+ for numeric nicks ! */
+ SetServerYXX(cptr, acptr, parv[6]);
+
+ /* Attach any necessary UWorld config items. */
+ attach_confs_byhost(cptr, host, CONF_UWORLD);
+
+ if (*parv[7] == '+')
+ set_server_flags(acptr, parv[7] + 1);
+
+ Count_newremoteserver(UserStats);
+ if (Protocol(acptr) < 10)
+ SetFlag(acptr, FLAG_TS8);
+ add_client_to_list(acptr);
+ hAddClient(acptr);
+ if (*parv[5] == 'J')
+ {
+ SetBurst(acptr);
+ SetJunction(acptr);
+ for (bcptr = cli_serv(acptr)->up; !IsMe(bcptr); bcptr = cli_serv(bcptr)->up)
+ if (IsBurstOrBurstAck(bcptr))
+ break;
+ if (IsMe(bcptr))
+ sendto_opmask_butone(0, SNO_NETWORK, "Net junction: %s %s",
+ cli_name(sptr), cli_name(acptr));
+ }
+ /*
+ * Old sendto_serv_but_one() call removed because we now need to send
+ * different names to different servers (domain name matching).
+ */
+ for (i = 0; i <= HighestFd; i++)
+ {
+ if (!(bcptr = LocalClientArray[i]) || !IsServer(bcptr) ||
+ bcptr == cptr || IsMe(bcptr))
+ continue;
+ if (0 == match(cli_name(&me), cli_name(acptr)))
+ continue;
+ sendcmdto_one(sptr, CMD_SERVER, bcptr, "%s %d 0 %s %s %s%s +%s%s%s :%s",
+ cli_name(acptr), hop + 1, parv[4], parv[5],
+ NumServCap(acptr), IsHub(acptr) ? "h" : "",
+ IsService(acptr) ? "s" : "", IsIPv6(acptr) ? "6" : "",
+ cli_info(acptr));
+ }
+ return 0;
+}
projects / ircu2.10.12-pk.git / blobdiff