--- /dev/null
+/*
+ * IRC - Internet Relay Chat, ircd/m_join.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.
+ *
+ * $Id$
+ */
+
+#include "config.h"
+
+#include "channel.h"
+#include "client.h"
+#include "gline.h"
+#include "hash.h"
+#include "ircd.h"
+#include "ircd_chattr.h"
+#include "ircd_features.h"
+#include "ircd_log.h"
+#include "ircd_reply.h"
+#include "ircd_string.h"
+#include "msg.h"
+#include "numeric.h"
+#include "numnicks.h"
+#include "s_debug.h"
+#include "s_user.h"
+#include "send.h"
+#include "sys.h"
+
+/* #include <assert.h> -- Now using assert in ircd_log.h */
+#include <stdlib.h>
+#include <string.h>
+
+/** Searches for and handles a 0 in a join list.
+ * @param[in] cptr Client that sent us the message.
+ * @param[in] sptr Original source of message.
+ * @param[in] chanlist List of channels to join.
+ * @return First token in \a chanlist after the final 0 entry, which
+ * may be its nul terminator (if the final entry is a 0 entry).
+ */
+static char *
+last0(struct Client *cptr, struct Client *sptr, char *chanlist)
+{
+ char *p;
+ int join0 = 0;
+
+ for (p = chanlist; p[0]; p++) /* find last "JOIN 0" */
+ if (p[0] == '0' && (p[1] == ',' || p[1] == '\0')) {
+ if (p[1] == ',')
+ p++;
+ chanlist = p + 1;
+ join0 = 1;
+ } else {
+ while (p[0] != ',' && p[0] != '\0') /* skip past channel name */
+ p++;
+
+ if (!p[0]) /* hit the end */
+ break;
+ }
+
+ if (join0) {
+ struct JoinBuf part;
+ struct Membership *member;
+
+ joinbuf_init(&part, sptr, cptr, JOINBUF_TYPE_PARTALL,
+ "Left all channels", 0);
+
+ joinbuf_join(&part, 0, 0);
+
+ while ((member = cli_user(sptr)->channel))
+ joinbuf_join(&part, member->channel,
+ IsZombie(member) ? CHFL_ZOMBIE :
+ IsDelayedJoin(member) ? CHFL_DELAYED :
+ 0);
+
+ joinbuf_flush(&part);
+ }
+
+ return chanlist;
+}
+
+/** Handle a JOIN message from a client connection.
+ * 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 m_join(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
+{
+ struct Channel *chptr;
+ struct JoinBuf join;
+ struct JoinBuf create;
+ struct Gline *gline;
+ char *p = 0;
+ char *chanlist;
+ char *name;
+ char *keys;
+
+ if (parc < 2 || *parv[1] == '\0')
+ return need_more_params(sptr, "JOIN");
+
+ joinbuf_init(&join, sptr, cptr, JOINBUF_TYPE_JOIN, 0, 0);
+ joinbuf_init(&create, sptr, cptr, JOINBUF_TYPE_CREATE, 0, TStime());
+
+ chanlist = last0(cptr, sptr, parv[1]); /* find last "JOIN 0" */
+
+ keys = parv[2]; /* remember where keys are */
+
+ for (name = ircd_strtok(&p, chanlist, ","); name;
+ name = ircd_strtok(&p, 0, ",")) {
+ char *key = 0;
+
+ /* If we have any more keys, take the first for this channel. */
+ if (!BadPtr(keys)
+ && (keys = strchr(key = keys, ',')))
+ *keys++ = '\0';
+
+ /* Empty keys are the same as no keys. */
+ if (key && !key[0])
+ key = 0;
+
+ if (!IsChannelName(name) || !strIsIrcCh(name))
+ {
+ /* bad channel name */
+ send_reply(sptr, ERR_NOSUCHCHANNEL, name);
+ continue;
+ }
+
+ if (cli_user(sptr)->joined >= feature_int(FEAT_MAXCHANNELSPERUSER)
+ && !HasPriv(sptr, PRIV_CHAN_LIMIT)) {
+ send_reply(sptr, ERR_TOOMANYCHANNELS, name);
+ break; /* no point processing the other channels */
+ }
+
+ /* BADCHANed channel */
+ if ((gline = gline_find(name, GLINE_BADCHAN | GLINE_EXACT)) &&
+ GlineIsActive(gline) && !IsAnOper(sptr)) {
+ send_reply(sptr, ERR_BANNEDFROMCHAN, name);
+ continue;
+ }
+
+ if (!(chptr = FindChannel(name))) {
+ if (((name[0] == '&') && !feature_bool(FEAT_LOCAL_CHANNELS))
+ || strlen(name) > IRCD_MIN(CHANNELLEN, feature_int(FEAT_CHANNELLEN))) {
+ send_reply(sptr, ERR_NOSUCHCHANNEL, name);
+ continue;
+ }
+
+ if (!(chptr = get_channel(sptr, name, CGT_CREATE)))
+ continue;
+
+ /* Try to add the new channel as a recent target for the user. */
+ if (check_target_limit(sptr, chptr, chptr->chname, 0)) {
+ chptr->members = 0;
+ destruct_channel(chptr);
+ continue;
+ }
+
+ joinbuf_join(&create, chptr, CHFL_CHANOP | CHFL_CHANNEL_MANAGER);
+ } else if (find_member_link(chptr, sptr)) {
+ continue; /* already on channel */
+ } else if (check_target_limit(sptr, chptr, chptr->chname, 0)) {
+ continue;
+ } else {
+ int flags = CHFL_DEOPPED;
+ int err = 0;
+
+ /* Check Apass/Upass -- since we only ever look at a single
+ * "key" per channel now, this hampers brute force attacks. */
+ if (key && !strcmp(key, chptr->mode.apass))
+ flags = CHFL_CHANOP | CHFL_CHANNEL_MANAGER;
+ else if (key && !strcmp(key, chptr->mode.upass))
+ flags = CHFL_CHANOP;
+ else if (chptr->users == 0 && !chptr->mode.apass[0]) {
+ /* Joining a zombie channel (zannel): give ops and increment TS. */
+ flags = CHFL_CHANOP;
+ chptr->creationtime++;
+ } else if (IsInvited(sptr, chptr)) {
+ /* Invites bypass these other checks. */
+ } else if (chptr->mode.mode & MODE_INVITEONLY)
+ err = ERR_INVITEONLYCHAN;
+ else if (chptr->mode.limit && (chptr->users >= chptr->mode.limit))
+ err = ERR_CHANNELISFULL;
+ else if ((chptr->mode.mode & MODE_REGONLY) && !IsAccount(sptr))
+ err = ERR_NEEDREGGEDNICK;
+ else if (find_ban(sptr, chptr->banlist))
+ err = ERR_BANNEDFROMCHAN;
+ else if (*chptr->mode.key && (!key || strcmp(key, chptr->mode.key)))
+ err = ERR_BADCHANNELKEY;
+
+ /* An oper with WALK_LCHAN privilege can join a local channel
+ * he otherwise could not join by using "OVERRIDE" as the key.
+ * This will generate a HACK(4) notice, but fails if the oper
+ * could normally join the channel. */
+ if (IsLocalChannel(chptr->chname)
+ && HasPriv(sptr, PRIV_WALK_LCHAN)
+ && !(flags & CHFL_CHANOP)
+ && key && !strcmp(key, "OVERRIDE"))
+ {
+ switch (err) {
+ case 0:
+ if (strcmp(chptr->mode.key, "OVERRIDE")
+ && strcmp(chptr->mode.apass, "OVERRIDE")
+ && strcmp(chptr->mode.upass, "OVERRIDE")) {
+ send_reply(sptr, ERR_DONTCHEAT, chptr->chname);
+ continue;
+ }
+ break;
+ case ERR_INVITEONLYCHAN: err = 'i'; break;
+ case ERR_CHANNELISFULL: err = 'l'; break;
+ case ERR_BANNEDFROMCHAN: err = 'b'; break;
+ case ERR_BADCHANNELKEY: err = 'k'; break;
+ case ERR_NEEDREGGEDNICK: err = 'r'; break;
+ default: err = '?'; break;
+ }
+ /* send accountability notice */
+ if (err)
+ sendto_opmask_butone(0, SNO_HACK4, "OPER JOIN: %C JOIN %H "
+ "(overriding +%c)", sptr, chptr, err);
+ err = 0;
+ }
+
+ /* Is there some reason the user may not join? */
+ if (err) {
+ switch(err) {
+ case ERR_NEEDREGGEDNICK:
+ send_reply(sptr,
+ ERR_NEEDREGGEDNICK,
+ chptr->chname,
+ feature_str(FEAT_URLREG));
+ break;
+ default:
+ send_reply(sptr, err, chptr->chname);
+ break;
+ }
+ continue;
+ }
+
+ joinbuf_join(&join, chptr, flags);
+ if (flags & CHFL_CHANOP) {
+ struct ModeBuf mbuf;
+ /* Always let the server op him: this is needed on a net with older servers
+ because they 'destruct' channels immediately when they become empty without
+ sending out a DESTRUCT message. As a result, they would always bounce a mode
+ (as HACK(2)) when the user ops himself.
+ (There is also no particularly good reason to have the user op himself.)
+ */
+ modebuf_init(&mbuf, &me, cptr, chptr, MODEBUF_DEST_SERVER);
+ modebuf_mode_client(&mbuf, MODE_ADD | MODE_CHANOP, sptr,
+ chptr->mode.apass[0] ? ((flags & CHFL_CHANNEL_MANAGER) ? 0 : 1) : MAXOPLEVEL);
+ modebuf_flush(&mbuf);
+ }
+ }
+
+ del_invite(sptr, chptr);
+
+ if (chptr->topic[0]) {
+ send_reply(sptr, RPL_TOPIC, chptr->chname, chptr->topic);
+ send_reply(sptr, RPL_TOPICWHOTIME, chptr->chname, chptr->topic_nick,
+ chptr->topic_time);
+ }
+
+ do_names(sptr, chptr, NAMES_ALL|NAMES_EON); /* send /names list */
+ }
+
+ joinbuf_flush(&join); /* must be first, if there's a JOIN 0 */
+ joinbuf_flush(&create);
+
+ return 0;
+}
+
+/** Handle a JOIN message from a server connection.
+ * 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_join(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
+{
+ struct Membership *member;
+ struct Channel *chptr;
+ struct JoinBuf join;
+ unsigned int flags;
+ time_t creation = 0;
+ char *p = 0;
+ char *chanlist;
+ char *name;
+
+ if (IsServer(sptr))
+ {
+ return protocol_violation(cptr,
+ "%s tried to JOIN %s, duh!",
+ cli_name(sptr),
+ (parc < 2 || *parv[1] == '\0') ? "a channel" :
+ parv[1]
+ );
+ }
+
+ if (parc < 2 || *parv[1] == '\0')
+ return need_more_params(sptr, "JOIN");
+
+ if (parc > 2 && parv[2])
+ creation = atoi(parv[2]);
+
+ joinbuf_init(&join, sptr, cptr, JOINBUF_TYPE_JOIN, 0, 0);
+
+ chanlist = last0(cptr, sptr, parv[1]); /* find last "JOIN 0" */
+
+ for (name = ircd_strtok(&p, chanlist, ","); name;
+ name = ircd_strtok(&p, 0, ",")) {
+
+ flags = CHFL_DEOPPED;
+
+ if (IsLocalChannel(name) || !IsChannelName(name))
+ {
+ protocol_violation(cptr, "%s tried to join %s", cli_name(sptr), name);
+ continue;
+ }
+
+ if (!(chptr = FindChannel(name)))
+ {
+ /* No channel exists, so create one */
+ if (!(chptr = get_channel(sptr, name, CGT_CREATE)))
+ {
+ protocol_violation(sptr,"couldn't get channel %s for %s",
+ name,cli_name(sptr));
+ continue;
+ }
+ flags |= HasFlag(sptr, FLAG_TS8) ? CHFL_SERVOPOK : 0;
+
+ chptr->creationtime = creation;
+ }
+ else { /* We have a valid channel? */
+ if ((member = find_member_link(chptr, sptr)))
+ {
+ /* It is impossible to get here --Run */
+ if (!IsZombie(member)) /* already on channel */
+ continue;
+
+ flags = member->status & (CHFL_DEOPPED | CHFL_SERVOPOK);
+ remove_user_from_channel(sptr, chptr);
+ chptr = FindChannel(name);
+ }
+ else
+ flags |= HasFlag(sptr, FLAG_TS8) ? CHFL_SERVOPOK : 0;
+ /* Always copy the timestamp when it is older, that is the only way to
+ ensure network-wide synchronization of creation times.
+ We now also copy a creation time that only 1 second younger...
+ this is needed because the timestamp must be incremented
+ by one when someone joins an existing, but empty, channel.
+ However, this is only necessary when the channel is still
+ empty (also here) and when this channel doesn't have +A set.
+
+ To prevent this from allowing net-rides on the channel, we
+ clear all modes from the channel.
+
+ (Scenario for a net ride: c1 - s1 - s2 - c2, with c1 the only
+ user in the channel; c1 parts and rejoins, gaining ops.
+ Before s2 sees c1's part, c2 joins the channel and parts
+ immediately. s1 sees c1 part, c1 create, c2 join, c2 part;
+ c2's join resets the timestamp. s2 sees c2 join, c2 part, c1
+ part, c1 create; but since s2 sees the channel as a zannel or
+ non-existent, it does not bounce the create with the newer
+ timestamp.)
+ */
+ if (creation && (creation < chptr->creationtime ||
+ (!chptr->mode.apass[0] && chptr->users == 0))) {
+ struct Membership *member;
+ struct ModeBuf mbuf;
+
+ chptr->creationtime = creation;
+ /* Wipe out the current modes on the channel. */
+ modebuf_init(&mbuf, sptr, cptr, chptr, MODEBUF_DEST_CHANNEL | MODEBUF_DEST_HACK3);
+
+ modebuf_mode(&mbuf, MODE_DEL | chptr->mode.mode);
+ chptr->mode.mode &= MODE_BURSTADDED | MODE_WASDELJOINS;
+
+ if (chptr->mode.limit) {
+ modebuf_mode_uint(&mbuf, MODE_DEL | MODE_LIMIT, chptr->mode.limit);
+ chptr->mode.limit = 0;
+ }
+
+ if (chptr->mode.key[0]) {
+ modebuf_mode_string(&mbuf, MODE_DEL | MODE_KEY, chptr->mode.key, 0);
+ chptr->mode.key[0] = '\0';
+ }
+
+ if (chptr->mode.upass[0]) {
+ modebuf_mode_string(&mbuf, MODE_DEL | MODE_UPASS, chptr->mode.upass, 0);
+ chptr->mode.upass[0] = '\0';
+ }
+
+ if (chptr->mode.apass[0]) {
+ modebuf_mode_string(&mbuf, MODE_DEL | MODE_APASS, chptr->mode.apass, 0);
+ chptr->mode.apass[0] = '\0';
+ }
+
+ for (member = chptr->members; member; member = member->next_member)
+ {
+ if (IsChanOp(member)) {
+ modebuf_mode_client(&mbuf, MODE_DEL | MODE_CHANOP, member->user, OpLevel(member));
+ member->status &= ~CHFL_CHANOP;
+ }
+ if (HasVoice(member)) {
+ modebuf_mode_client(&mbuf, MODE_DEL | MODE_VOICE, member->user, OpLevel(member));
+ member->status &= ~CHFL_VOICE;
+ }
+ }
+ modebuf_flush(&mbuf);
+ }
+ }
+
+ joinbuf_join(&join, chptr, flags);
+ }
+
+ joinbuf_flush(&join); /* flush joins... */
+
+ return 0;
+}
projects / ircu2.10.12-pk.git / blobdiff