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/* |
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* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
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* |
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* Copyright (c) 1997-2017 ircd-hybrid development team |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
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* USA |
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*/ |
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|
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/*! \file m_join.c |
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* \brief Includes required functions for processing the JOIN command. |
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* \version $Id$ |
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*/ |
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|
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#include "stdinc.h" |
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#include "list.h" |
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#include "channel.h" |
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#include "channel_mode.h" |
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#include "client.h" |
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#include "hash.h" |
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#include "irc_string.h" |
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#include "ircd.h" |
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#include "numeric.h" |
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#include "send.h" |
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#include "server.h" |
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#include "conf.h" |
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#include "conf_resv.h" |
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#include "parse.h" |
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#include "modules.h" |
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|
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|
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static void set_final_mode(const struct Mode *, const struct Mode *); |
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static void remove_our_modes(struct Channel *, struct Client *); |
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static void remove_a_mode(struct Channel *, struct Client *, int, const char); |
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|
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static char modebuf[MODEBUFLEN]; |
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static char parabuf[MODEBUFLEN]; |
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static char sendbuf[MODEBUFLEN]; |
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static char *mbuf; |
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|
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/*! \brief JOIN command handler |
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* |
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* \param source_p Pointer to allocated Client struct from which the message |
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* originally comes from. This can be a local or remote client. |
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* \param parc Integer holding the number of supplied arguments. |
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* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
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* pointers. |
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* \note Valid arguments for this command are: |
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* - parv[0] = command |
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* - parv[1] = channel |
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* - parv[2] = channel password (key) |
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*/ |
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static int |
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m_join(struct Client *source_p, int parc, char *parv[]) |
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{ |
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if (EmptyString(parv[1])) |
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{ |
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sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "JOIN"); |
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return 0; |
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} |
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|
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channel_do_join(source_p, parv[1], parv[2]); |
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return 0; |
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} |
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|
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/* ms_join() |
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* |
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* inputs - parv[0] = command |
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* parv[1] = ts |
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* parv[2] = channel name |
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* parv[3] = modes (Deprecated) |
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* output - none |
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* side effects - handles remote JOIN's sent by servers. In TSora |
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* remote clients are joined using SJOIN, hence a |
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* JOIN sent by a server on behalf of a client is an error. |
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* here, the initial code is in to take an extra parameter |
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* and use it for the TimeStamp on a new channel. |
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*/ |
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static int |
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ms_join(struct Client *source_p, int parc, char *parv[]) |
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{ |
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uintmax_t newts = 0; |
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uintmax_t oldts = 0; |
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int keep_our_modes = 1; |
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int keep_new_modes = 1; |
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int isnew = 0; |
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const char *servername = NULL; |
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struct Channel *chptr = NULL; |
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struct Mode mode, *oldmode; |
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|
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if (!IsClient(source_p)) |
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return 0; |
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|
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if (parc == 2 && !strcmp(parv[1], "0")) |
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{ |
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channel_do_join_0(source_p); |
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return 0; |
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} |
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|
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if (parc < 4) |
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return 0; |
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|
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if (!channel_check_name(parv[2], 0)) |
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{ |
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sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE, |
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"*** Too long or invalid channel name from %s(via %s): %s", |
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source_p->name, source_p->from->name, parv[2]); |
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return 0; |
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} |
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|
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mbuf = modebuf; |
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mode.mode = mode.limit = 0; |
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mode.key[0] = '\0'; |
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|
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if ((chptr = hash_find_channel(parv[2])) == NULL) |
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{ |
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isnew = 1; |
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chptr = channel_make(parv[2]); |
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} |
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|
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newts = strtoumax(parv[1], NULL, 10); |
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oldts = chptr->creationtime; |
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oldmode = &chptr->mode; |
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|
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if (ConfigGeneral.ignore_bogus_ts) |
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{ |
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if (newts < 800000000) |
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{ |
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sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE, |
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"*** Bogus TS %ju on %s ignored from %s(via %s)", |
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newts, chptr->name, |
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source_p->name, source_p->from->name); |
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|
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newts = (oldts == 0) ? 0 : 800000000; |
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} |
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} |
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else |
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{ |
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if (!newts && !isnew && oldts) |
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{ |
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sendto_channel_local(NULL, chptr, 0, 0, 0, |
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":%s NOTICE %s :*** Notice -- TS for %s changed from %ju to 0", |
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me.name, chptr->name, chptr->name, oldts); |
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sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
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"Server %s changing TS on %s from %ju to 0", |
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source_p->name, chptr->name, oldts); |
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} |
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} |
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|
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if (isnew) |
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chptr->creationtime = newts; |
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else if (newts == 0 || oldts == 0) |
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chptr->creationtime = 0; |
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else if (newts == oldts) |
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; |
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else if (newts < oldts) |
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{ |
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keep_our_modes = 0; |
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chptr->creationtime = newts; |
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} |
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else |
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keep_new_modes = 0; |
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|
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if (!keep_new_modes) |
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mode = *oldmode; |
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else if (keep_our_modes) |
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{ |
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mode.mode |= oldmode->mode; |
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|
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if (oldmode->limit > mode.limit) |
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mode.limit = oldmode->limit; |
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if (strcmp(mode.key, oldmode->key) < 0) |
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strlcpy(mode.key, oldmode->key, sizeof(mode.key)); |
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} |
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|
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set_final_mode(&mode, oldmode); |
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chptr->mode = mode; |
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|
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/* Lost the TS, other side wins, so remove modes on this side */ |
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if (!keep_our_modes) |
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{ |
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remove_our_modes(chptr, source_p); |
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|
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if (chptr->topic[0]) |
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{ |
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channel_set_topic(chptr, "", "", 0, 0); |
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sendto_channel_local(NULL, chptr, 0, 0, 0, ":%s TOPIC %s :", |
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(IsHidden(source_p) || |
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ConfigServerHide.hide_servers) ? |
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me.name : source_p->name, chptr->name); |
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} |
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|
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sendto_channel_local(NULL, chptr, 0, 0, 0, |
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":%s NOTICE %s :*** Notice -- TS for %s changed from %ju to %ju", |
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me.name, chptr->name, chptr->name, |
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oldts, newts); |
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} |
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|
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if (*modebuf) |
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{ |
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servername = (ConfigServerHide.hide_servers || IsHidden(source_p)) ? |
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me.name : source_p->name; |
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|
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/* This _SHOULD_ be to ALL_MEMBERS |
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* It contains only +imnpstlk, etc */ |
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sendto_channel_local(NULL, chptr, 0, 0, 0, ":%s MODE %s %s %s", |
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servername, chptr->name, modebuf, parabuf); |
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} |
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|
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if (!IsMember(source_p, chptr)) |
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{ |
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add_user_to_channel(chptr, source_p, 0, 1); |
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|
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sendto_channel_local(NULL, chptr, 0, CAP_EXTENDED_JOIN, 0, ":%s!%s@%s JOIN %s %s :%s", |
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source_p->name, source_p->username, |
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source_p->host, chptr->name, source_p->account, source_p->info); |
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sendto_channel_local(NULL, chptr, 0, 0, CAP_EXTENDED_JOIN, ":%s!%s@%s JOIN :%s", |
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source_p->name, source_p->username, |
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source_p->host, chptr->name); |
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|
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if (source_p->away[0]) |
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sendto_channel_local(source_p, chptr, 0, CAP_AWAY_NOTIFY, 0, |
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":%s!%s@%s AWAY :%s", |
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source_p->name, source_p->username, |
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source_p->host, source_p->away); |
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} |
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|
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sendto_server(source_p, 0, 0, ":%s JOIN %ju %s +", |
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source_p->id, chptr->creationtime, chptr->name); |
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return 0; |
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} |
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|
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/* set_final_mode |
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* |
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* inputs - channel mode |
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* - old channel mode |
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* output - NONE |
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* side effects - walk through all the channel modes turning off modes |
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* that were on in oldmode but aren't on in mode. |
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* Then walk through turning on modes that are on in mode |
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* but were not set in oldmode. |
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*/ |
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static void |
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set_final_mode(const struct Mode *mode, const struct Mode *oldmode) |
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{ |
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char *pbuf = parabuf; |
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int what = 0, len = 0; |
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|
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for (const struct chan_mode *tab = cmode_tab; tab->letter; ++tab) |
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{ |
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if (tab->mode && (tab->mode & mode->mode) && !(tab->mode & oldmode->mode)) |
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{ |
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if (what != 1) |
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{ |
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*mbuf++ = '+'; |
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what = 1; |
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} |
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|
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*mbuf++ = tab->letter; |
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} |
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} |
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|
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for (const struct chan_mode *tab = cmode_tab; tab->letter; ++tab) |
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{ |
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if (tab->mode && (tab->mode & oldmode->mode) && !(tab->mode & mode->mode)) |
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{ |
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if (what != -1) |
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{ |
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*mbuf++ = '-'; |
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what = -1; |
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} |
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|
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*mbuf++ = tab->letter; |
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} |
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} |
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|
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if (oldmode->limit && mode->limit == 0) |
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{ |
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if (what != -1) |
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{ |
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*mbuf++ = '-'; |
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what = -1; |
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} |
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|
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*mbuf++ = 'l'; |
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} |
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|
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if (oldmode->key[0] && mode->key[0] == '\0') |
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{ |
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if (what != -1) |
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{ |
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*mbuf++ = '-'; |
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what = -1; |
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} |
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|
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*mbuf++ = 'k'; |
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len = sprintf(pbuf, "%s ", oldmode->key); |
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pbuf += len; |
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} |
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|
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if (mode->limit && oldmode->limit != mode->limit) |
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{ |
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if (what != 1) |
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{ |
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*mbuf++ = '+'; |
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what = 1; |
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} |
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|
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*mbuf++ = 'l'; |
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len = sprintf(pbuf, "%u ", mode->limit); |
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pbuf += len; |
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} |
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|
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if (mode->key[0] && strcmp(oldmode->key, mode->key)) |
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{ |
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if (what != 1) |
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{ |
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*mbuf++ = '+'; |
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what = 1; |
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} |
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|
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*mbuf++ = 'k'; |
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len = sprintf(pbuf, "%s ", mode->key); |
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pbuf += len; |
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} |
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|
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*mbuf = '\0'; |
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} |
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|
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/* remove_our_modes() |
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* |
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* inputs - pointer to channel to remove modes from |
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* - client pointer |
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* output - NONE |
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* side effects - Go through the local members, remove all their |
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* chanop modes etc., this side lost the TS. |
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*/ |
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static void |
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remove_our_modes(struct Channel *chptr, struct Client *source_p) |
| 352 |
{ |
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remove_a_mode(chptr, source_p, CHFL_CHANOP, 'o'); |
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remove_a_mode(chptr, source_p, CHFL_HALFOP, 'h'); |
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remove_a_mode(chptr, source_p, CHFL_VOICE, 'v'); |
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} |
| 357 |
|
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/* remove_a_mode() |
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* |
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* inputs - |
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* output - NONE |
| 362 |
* side effects - remove ONE mode from a channel |
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*/ |
| 364 |
static void |
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remove_a_mode(struct Channel *chptr, struct Client *source_p, int mask, const char flag) |
| 366 |
{ |
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dlink_node *node = NULL; |
| 368 |
char lmodebuf[MODEBUFLEN]; |
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const char *lpara[MAXMODEPARAMS]; |
| 370 |
int count = 0, lcount = 0; |
| 371 |
|
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mbuf = lmodebuf; |
| 373 |
*mbuf++ = '-'; |
| 374 |
|
| 375 |
for (lcount = 0; lcount < MAXMODEPARAMS; ++lcount) |
| 376 |
lpara[lcount] = ""; |
| 377 |
|
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sendbuf[0] = '\0'; |
| 379 |
|
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DLINK_FOREACH(node, chptr->members.head) |
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{ |
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struct Membership *member = node->data; |
| 383 |
|
| 384 |
if ((member->flags & mask) == 0) |
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continue; |
| 386 |
|
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member->flags &= ~mask; |
| 388 |
|
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lpara[count++] = member->client_p->name; |
| 390 |
|
| 391 |
*mbuf++ = flag; |
| 392 |
|
| 393 |
if (count >= MAXMODEPARAMS) |
| 394 |
{ |
| 395 |
for (lcount = 0; lcount < MAXMODEPARAMS; ++lcount) |
| 396 |
{ |
| 397 |
if (*lpara[lcount] == '\0') |
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break; |
| 399 |
|
| 400 |
strlcat(sendbuf, " ", sizeof(sendbuf)); |
| 401 |
strlcat(sendbuf, lpara[lcount], sizeof(sendbuf)); |
| 402 |
lpara[lcount] = ""; |
| 403 |
} |
| 404 |
|
| 405 |
*mbuf = '\0'; |
| 406 |
sendto_channel_local(NULL, chptr, 0, 0, 0, ":%s MODE %s %s%s", |
| 407 |
(IsHidden(source_p) || |
| 408 |
ConfigServerHide.hide_servers) ? |
| 409 |
me.name : source_p->name, |
| 410 |
chptr->name, lmodebuf, sendbuf); |
| 411 |
mbuf = lmodebuf; |
| 412 |
*mbuf++ = '-'; |
| 413 |
count = 0; |
| 414 |
sendbuf[0] = '\0'; |
| 415 |
} |
| 416 |
} |
| 417 |
|
| 418 |
if (count) |
| 419 |
{ |
| 420 |
*mbuf = '\0'; |
| 421 |
|
| 422 |
for (lcount = 0; lcount < MAXMODEPARAMS; ++lcount) |
| 423 |
{ |
| 424 |
if (*lpara[lcount] == '\0') |
| 425 |
break; |
| 426 |
|
| 427 |
strlcat(sendbuf, " ", sizeof(sendbuf)); |
| 428 |
strlcat(sendbuf, lpara[lcount], sizeof(sendbuf)); |
| 429 |
} |
| 430 |
|
| 431 |
sendto_channel_local(NULL, chptr, 0, 0, 0, ":%s MODE %s %s%s", |
| 432 |
(IsHidden(source_p) || ConfigServerHide.hide_servers) ? |
| 433 |
me.name : source_p->name, chptr->name, lmodebuf, sendbuf); |
| 434 |
} |
| 435 |
} |
| 436 |
|
| 437 |
static struct Message join_msgtab = |
| 438 |
{ |
| 439 |
.cmd = "JOIN", |
| 440 |
.args_min = 2, |
| 441 |
.args_max = MAXPARA, |
| 442 |
.handlers[UNREGISTERED_HANDLER] = m_unregistered, |
| 443 |
.handlers[CLIENT_HANDLER] = m_join, |
| 444 |
.handlers[SERVER_HANDLER] = ms_join, |
| 445 |
.handlers[ENCAP_HANDLER] = m_ignore, |
| 446 |
.handlers[OPER_HANDLER] = m_join |
| 447 |
}; |
| 448 |
|
| 449 |
static void |
| 450 |
module_init(void) |
| 451 |
{ |
| 452 |
mod_add_cmd(&join_msgtab); |
| 453 |
} |
| 454 |
|
| 455 |
static void |
| 456 |
module_exit(void) |
| 457 |
{ |
| 458 |
mod_del_cmd(&join_msgtab); |
| 459 |
} |
| 460 |
|
| 461 |
struct module module_entry = |
| 462 |
{ |
| 463 |
.version = "$Revision$", |
| 464 |
.modinit = module_init, |
| 465 |
.modexit = module_exit, |
| 466 |
.flags = MODULE_FLAG_CORE |
| 467 |
}; |
