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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) 1997-2014 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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* USA |
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*/ |
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|
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/*! \file channel.c |
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* \brief Responsible for managing channels, members, bans and topics |
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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 "conf.h" |
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#include "hostmask.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 "server.h" |
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#include "send.h" |
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#include "event.h" |
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#include "memory.h" |
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#include "mempool.h" |
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#include "misc.h" |
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#include "resv.h" |
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|
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|
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dlink_list channel_list; |
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mp_pool_t *ban_pool; /*! \todo ban_pool shouldn't be a global var */ |
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|
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struct event splitmode_event = |
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{ |
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.name = "check_splitmode", |
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.handler = check_splitmode, |
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.when = 5 |
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}; |
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|
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static mp_pool_t *member_pool, *channel_pool; |
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|
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|
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/*! \brief Initializes the channel blockheap, adds known channel CAPAB |
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*/ |
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void |
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channel_init(void) |
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{ |
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add_capability("EX", CAP_EX, 1); |
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add_capability("IE", CAP_IE, 1); |
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|
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channel_pool = mp_pool_new(sizeof(struct Channel), MP_CHUNK_SIZE_CHANNEL); |
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ban_pool = mp_pool_new(sizeof(struct Ban), MP_CHUNK_SIZE_BAN); |
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member_pool = mp_pool_new(sizeof(struct Membership), MP_CHUNK_SIZE_MEMBER); |
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} |
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|
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/*! \brief Adds a user to a channel by adding another link to the |
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* channels member chain. |
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* \param chptr Pointer to channel to add client to |
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* \param who Pointer to client (who) to add |
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* \param flags Flags for chanops etc |
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* \param flood_ctrl Whether to count this join in flood calculations |
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*/ |
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void |
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add_user_to_channel(struct Channel *chptr, struct Client *who, |
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unsigned int flags, int flood_ctrl) |
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{ |
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struct Membership *ms = NULL; |
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|
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if (GlobalSetOptions.joinfloodtime > 0) |
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{ |
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if (flood_ctrl) |
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++chptr->number_joined; |
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|
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chptr->number_joined -= (CurrentTime - chptr->last_join_time) * |
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(((float)GlobalSetOptions.joinfloodcount) / |
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(float)GlobalSetOptions.joinfloodtime); |
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|
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if (chptr->number_joined <= 0) |
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{ |
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chptr->number_joined = 0; |
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ClearJoinFloodNoticed(chptr); |
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} |
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else if (chptr->number_joined >= GlobalSetOptions.joinfloodcount) |
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{ |
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chptr->number_joined = GlobalSetOptions.joinfloodcount; |
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|
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if (!IsSetJoinFloodNoticed(chptr)) |
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{ |
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SetJoinFloodNoticed(chptr); |
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sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE, |
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"Possible Join Flooder %s on %s target: %s", |
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get_client_name(who, HIDE_IP), |
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who->servptr->name, chptr->chname); |
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} |
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} |
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|
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chptr->last_join_time = CurrentTime; |
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} |
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|
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ms = mp_pool_get(member_pool); |
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ms->client_p = who; |
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ms->chptr = chptr; |
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ms->flags = flags; |
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|
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dlinkAdd(ms, &ms->channode, &chptr->members); |
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|
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if (MyConnect(who)) |
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dlinkAdd(ms, &ms->locchannode, &chptr->locmembers); |
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|
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dlinkAdd(ms, &ms->usernode, &who->channel); |
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} |
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|
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/*! \brief Deletes an user from a channel by removing a link in the |
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* channels member chain. |
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* \param member Pointer to Membership struct |
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*/ |
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void |
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remove_user_from_channel(struct Membership *member) |
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{ |
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struct Client *client_p = member->client_p; |
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struct Channel *chptr = member->chptr; |
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|
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dlinkDelete(&member->channode, &chptr->members); |
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|
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if (MyConnect(client_p)) |
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dlinkDelete(&member->locchannode, &chptr->locmembers); |
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|
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dlinkDelete(&member->usernode, &client_p->channel); |
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|
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mp_pool_release(member); |
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|
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if (chptr->members.head == NULL) |
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destroy_channel(chptr); |
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} |
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|
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/* send_members() |
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* |
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* inputs - |
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* output - NONE |
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* side effects - |
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*/ |
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static void |
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send_members(struct Client *client_p, struct Channel *chptr, |
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char *modebuf, char *parabuf) |
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{ |
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char buf[IRCD_BUFSIZE] = ""; |
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const dlink_node *ptr = NULL; |
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int tlen; /* length of text to append */ |
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char *t, *start; /* temp char pointer */ |
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|
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start = t = buf + snprintf(buf, sizeof(buf), ":%s SJOIN %lu %s %s %s:", |
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me.id, (unsigned long)chptr->channelts, |
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chptr->chname, modebuf, parabuf); |
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|
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DLINK_FOREACH(ptr, chptr->members.head) |
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{ |
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const struct Membership *ms = ptr->data; |
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|
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tlen = strlen(ms->client_p->id) + 1; /* +1 for space */ |
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|
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if (ms->flags & CHFL_CHANOP) |
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++tlen; |
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if (ms->flags & CHFL_HALFOP) |
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++tlen; |
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if (ms->flags & CHFL_VOICE) |
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++tlen; |
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|
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/* |
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* Space will be converted into CR, but we also need space for LF.. |
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* That's why we use '- 1' here -adx |
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*/ |
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if (t + tlen - buf > IRCD_BUFSIZE - 1) |
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{ |
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*(t - 1) = '\0'; /* Kill the space and terminate the string */ |
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sendto_one(client_p, "%s", buf); |
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t = start; |
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} |
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|
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if (ms->flags & CHFL_CHANOP) |
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*t++ = '@'; |
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if (ms->flags & CHFL_HALFOP) |
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*t++ = '%'; |
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if (ms->flags & CHFL_VOICE) |
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*t++ = '+'; |
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|
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strcpy(t, ms->client_p->id); |
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|
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t += strlen(t); |
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*t++ = ' '; |
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} |
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|
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/* Should always be non-NULL unless we have a kind of persistent channels */ |
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if (chptr->members.head) |
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t--; /* Take the space out */ |
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*t = '\0'; |
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sendto_one(client_p, "%s", buf); |
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} |
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|
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/*! \brief Sends +b/+e/+I |
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* \param client_p Client pointer to server |
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* \param chptr Pointer to channel |
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* \param list Pointer to list of modes to send |
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* \param flag Char flag flagging type of mode. Currently this can be 'b', e' or 'I' |
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*/ |
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static void |
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send_mode_list(struct Client *client_p, struct Channel *chptr, |
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const dlink_list *list, const char flag) |
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{ |
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const dlink_node *ptr = NULL; |
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char mbuf[IRCD_BUFSIZE] = ""; |
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char pbuf[IRCD_BUFSIZE] = ""; |
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int tlen, mlen, cur_len; |
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char *pp = pbuf; |
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|
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if (list->length == 0) |
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return; |
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|
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mlen = snprintf(mbuf, sizeof(mbuf), ":%s BMASK %lu %s %c :", me.id, |
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(unsigned long)chptr->channelts, chptr->chname, flag); |
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cur_len = mlen; |
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|
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DLINK_FOREACH(ptr, list->head) |
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{ |
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const struct Ban *banptr = ptr->data; |
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|
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tlen = banptr->len + 3; /* +3 for ! + @ + space */ |
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|
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/* |
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* Send buffer and start over if we cannot fit another ban |
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*/ |
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if (cur_len + (tlen - 1) > IRCD_BUFSIZE - 2) |
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{ |
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*(pp - 1) = '\0'; /* Get rid of trailing space on buffer */ |
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sendto_one(client_p, "%s%s", mbuf, pbuf); |
252 |
|
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cur_len = mlen; |
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pp = pbuf; |
255 |
} |
256 |
|
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pp += sprintf(pp, "%s!%s@%s ", banptr->name, banptr->user, |
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banptr->host); |
259 |
cur_len += tlen; |
260 |
} |
261 |
|
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*(pp - 1) = '\0'; /* Get rid of trailing space on buffer */ |
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sendto_one(client_p, "%s%s", mbuf, pbuf); |
264 |
} |
265 |
|
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/*! \brief Send "client_p" a full list of the modes for channel chptr |
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* \param client_p Pointer to client client_p |
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* \param chptr Pointer to channel pointer |
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*/ |
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void |
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send_channel_modes(struct Client *client_p, struct Channel *chptr) |
272 |
{ |
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char modebuf[MODEBUFLEN] = ""; |
274 |
char parabuf[MODEBUFLEN] = ""; |
275 |
|
276 |
channel_modes(chptr, client_p, modebuf, parabuf); |
277 |
send_members(client_p, chptr, modebuf, parabuf); |
278 |
|
279 |
send_mode_list(client_p, chptr, &chptr->banlist, 'b'); |
280 |
send_mode_list(client_p, chptr, &chptr->exceptlist, 'e'); |
281 |
send_mode_list(client_p, chptr, &chptr->invexlist, 'I'); |
282 |
} |
283 |
|
284 |
/*! \brief Check channel name for invalid characters |
285 |
* \param name Pointer to channel name string |
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* \param local Indicates whether it's a local or remote creation |
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* \return 0 if invalid, 1 otherwise |
288 |
*/ |
289 |
int |
290 |
check_channel_name(const char *name, const int local) |
291 |
{ |
292 |
const char *p = name; |
293 |
|
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assert(name != NULL); |
295 |
|
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if (!IsChanPrefix(*p)) |
297 |
return 0; |
298 |
|
299 |
if (!local || !ConfigChannel.disable_fake_channels) |
300 |
{ |
301 |
while (*++p) |
302 |
if (!IsChanChar(*p)) |
303 |
return 0; |
304 |
} |
305 |
else |
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{ |
307 |
while (*++p) |
308 |
if (!IsVisibleChanChar(*p)) |
309 |
return 0; |
310 |
} |
311 |
|
312 |
return p - name <= CHANNELLEN; |
313 |
} |
314 |
|
315 |
void |
316 |
remove_ban(struct Ban *bptr, dlink_list *list) |
317 |
{ |
318 |
dlinkDelete(&bptr->node, list); |
319 |
|
320 |
MyFree(bptr->name); |
321 |
MyFree(bptr->user); |
322 |
MyFree(bptr->host); |
323 |
MyFree(bptr->who); |
324 |
|
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mp_pool_release(bptr); |
326 |
} |
327 |
|
328 |
/* free_channel_list() |
329 |
* |
330 |
* inputs - pointer to dlink_list |
331 |
* output - NONE |
332 |
* side effects - |
333 |
*/ |
334 |
void |
335 |
free_channel_list(dlink_list *list) |
336 |
{ |
337 |
dlink_node *ptr = NULL, *ptr_next = NULL; |
338 |
|
339 |
DLINK_FOREACH_SAFE(ptr, ptr_next, list->head) |
340 |
remove_ban(ptr->data, list); |
341 |
|
342 |
assert(list->tail == NULL && list->head == NULL); |
343 |
} |
344 |
|
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/*! \brief Get Channel block for chname (and allocate a new channel |
346 |
* block, if it didn't exist before) |
347 |
* \param chname Channel name |
348 |
* \return Channel block |
349 |
*/ |
350 |
struct Channel * |
351 |
make_channel(const char *chname) |
352 |
{ |
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struct Channel *chptr = NULL; |
354 |
|
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assert(!EmptyString(chname)); |
356 |
|
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chptr = mp_pool_get(channel_pool); |
358 |
|
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/* Doesn't hurt to set it here */ |
360 |
chptr->channelts = CurrentTime; |
361 |
chptr->last_join_time = CurrentTime; |
362 |
|
363 |
strlcpy(chptr->chname, chname, sizeof(chptr->chname)); |
364 |
dlinkAdd(chptr, &chptr->node, &channel_list); |
365 |
|
366 |
hash_add_channel(chptr); |
367 |
|
368 |
return chptr; |
369 |
} |
370 |
|
371 |
/*! \brief Walk through this channel, and destroy it. |
372 |
* \param chptr Channel pointer |
373 |
*/ |
374 |
void |
375 |
destroy_channel(struct Channel *chptr) |
376 |
{ |
377 |
dlink_node *ptr = NULL, *ptr_next = NULL; |
378 |
|
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DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->invites.head) |
380 |
del_invite(chptr, ptr->data); |
381 |
|
382 |
/* Free ban/exception/invex lists */ |
383 |
free_channel_list(&chptr->banlist); |
384 |
free_channel_list(&chptr->exceptlist); |
385 |
free_channel_list(&chptr->invexlist); |
386 |
|
387 |
dlinkDelete(&chptr->node, &channel_list); |
388 |
hash_del_channel(chptr); |
389 |
|
390 |
mp_pool_release(chptr); |
391 |
} |
392 |
|
393 |
/*! |
394 |
* \param chptr Pointer to channel |
395 |
* \return String pointer "=" if public, "@" if secret else "*" |
396 |
*/ |
397 |
static const char * |
398 |
channel_pub_or_secret(const struct Channel *chptr) |
399 |
{ |
400 |
if (SecretChannel(chptr)) |
401 |
return "@"; |
402 |
if (PrivateChannel(chptr)) |
403 |
return "*"; |
404 |
return "="; |
405 |
} |
406 |
|
407 |
/*! \brief lists all names on given channel |
408 |
* \param source_p Pointer to client struct requesting names |
409 |
* \param chptr Pointer to channel block |
410 |
* \param show_eon Show RPL_ENDOFNAMES numeric or not |
411 |
* (don't want it with /names with no params) |
412 |
*/ |
413 |
void |
414 |
channel_member_names(struct Client *source_p, struct Channel *chptr, |
415 |
int show_eon) |
416 |
{ |
417 |
const dlink_node *ptr = NULL; |
418 |
char buf[IRCD_BUFSIZE + 1] = ""; |
419 |
char *t = NULL, *start = NULL; |
420 |
int tlen = 0; |
421 |
int is_member = IsMember(source_p, chptr); |
422 |
int multi_prefix = HasCap(source_p, CAP_MULTI_PREFIX) != 0; |
423 |
int uhnames = HasCap(source_p, CAP_UHNAMES) != 0; |
424 |
|
425 |
if (PubChannel(chptr) || is_member) |
426 |
{ |
427 |
t = buf + snprintf(buf, sizeof(buf), numeric_form(RPL_NAMREPLY), |
428 |
me.name, source_p->name, |
429 |
channel_pub_or_secret(chptr), chptr->chname); |
430 |
start = t; |
431 |
|
432 |
DLINK_FOREACH(ptr, chptr->members.head) |
433 |
{ |
434 |
const struct Membership *ms = ptr->data; |
435 |
|
436 |
if (HasUMode(ms->client_p, UMODE_INVISIBLE) && !is_member) |
437 |
continue; |
438 |
|
439 |
if (!uhnames) |
440 |
tlen = strlen(ms->client_p->name) + 1; /* +1 for space */ |
441 |
else |
442 |
tlen = strlen(ms->client_p->name) + strlen(ms->client_p->username) + |
443 |
strlen(ms->client_p->host) + 3; /* +3 for ! + @ + space */ |
444 |
|
445 |
if (!multi_prefix) |
446 |
{ |
447 |
if (ms->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE)) |
448 |
++tlen; |
449 |
} |
450 |
else |
451 |
{ |
452 |
if (ms->flags & CHFL_CHANOP) |
453 |
++tlen; |
454 |
if (ms->flags & CHFL_HALFOP) |
455 |
++tlen; |
456 |
if (ms->flags & CHFL_VOICE) |
457 |
++tlen; |
458 |
} |
459 |
|
460 |
if (t + tlen - buf > IRCD_BUFSIZE - 2) |
461 |
{ |
462 |
*(t - 1) = '\0'; |
463 |
sendto_one(source_p, "%s", buf); |
464 |
t = start; |
465 |
} |
466 |
|
467 |
if (!uhnames) |
468 |
t += sprintf(t, "%s%s ", get_member_status(ms, multi_prefix), |
469 |
ms->client_p->name); |
470 |
else |
471 |
t += sprintf(t, "%s%s!%s@%s ", get_member_status(ms, multi_prefix), |
472 |
ms->client_p->name, ms->client_p->username, |
473 |
ms->client_p->host); |
474 |
} |
475 |
|
476 |
if (tlen) |
477 |
{ |
478 |
*(t - 1) = '\0'; |
479 |
sendto_one(source_p, "%s", buf); |
480 |
} |
481 |
} |
482 |
|
483 |
if (show_eon) |
484 |
sendto_one_numeric(source_p, &me, RPL_ENDOFNAMES, chptr->chname); |
485 |
} |
486 |
|
487 |
/*! \brief Adds client to invite list |
488 |
* \param chptr Pointer to channel block |
489 |
* \param who Pointer to client to add invite to |
490 |
*/ |
491 |
void |
492 |
add_invite(struct Channel *chptr, struct Client *who) |
493 |
{ |
494 |
del_invite(chptr, who); |
495 |
|
496 |
/* |
497 |
* Delete last link in chain if the list is max length |
498 |
*/ |
499 |
if (dlink_list_length(&who->localClient->invited) >= |
500 |
ConfigChannel.max_channels) |
501 |
del_invite(who->localClient->invited.tail->data, who); |
502 |
|
503 |
/* Add client to channel invite list */ |
504 |
dlinkAdd(who, make_dlink_node(), &chptr->invites); |
505 |
|
506 |
/* Add channel to the end of the client invite list */ |
507 |
dlinkAdd(chptr, make_dlink_node(), &who->localClient->invited); |
508 |
} |
509 |
|
510 |
/*! \brief Delete Invite block from channel invite list |
511 |
* and client invite list |
512 |
* \param chptr Pointer to Channel struct |
513 |
* \param who Pointer to client to remove invites from |
514 |
*/ |
515 |
void |
516 |
del_invite(struct Channel *chptr, struct Client *who) |
517 |
{ |
518 |
dlink_node *ptr = NULL; |
519 |
|
520 |
if ((ptr = dlinkFindDelete(&who->localClient->invited, chptr))) |
521 |
free_dlink_node(ptr); |
522 |
|
523 |
if ((ptr = dlinkFindDelete(&chptr->invites, who))) |
524 |
free_dlink_node(ptr); |
525 |
} |
526 |
|
527 |
/* get_member_status() |
528 |
* |
529 |
* inputs - pointer to struct Membership |
530 |
* - YES if we can combine different flags |
531 |
* output - string either @, +, % or "" depending on whether |
532 |
* chanop, voiced or user |
533 |
* side effects - |
534 |
* |
535 |
* NOTE: Returned string is usually a static buffer |
536 |
* (like in get_client_name) |
537 |
*/ |
538 |
const char * |
539 |
get_member_status(const struct Membership *ms, const int combine) |
540 |
{ |
541 |
static char buffer[4]; /* 4 for @%+\0 */ |
542 |
char *p = buffer; |
543 |
|
544 |
if (ms->flags & CHFL_CHANOP) |
545 |
{ |
546 |
if (!combine) |
547 |
return "@"; |
548 |
*p++ = '@'; |
549 |
} |
550 |
|
551 |
if (ms->flags & CHFL_HALFOP) |
552 |
{ |
553 |
if (!combine) |
554 |
return "%"; |
555 |
*p++ = '%'; |
556 |
} |
557 |
|
558 |
if (ms->flags & CHFL_VOICE) |
559 |
*p++ = '+'; |
560 |
*p = '\0'; |
561 |
|
562 |
return buffer; |
563 |
} |
564 |
|
565 |
/*! |
566 |
* \param who Pointer to Client to check |
567 |
* \param list Pointer to ban list to search |
568 |
* \return 1 if ban found for given n!u\@h mask, 0 otherwise |
569 |
* |
570 |
*/ |
571 |
static int |
572 |
find_bmask(const struct Client *who, const dlink_list *const list) |
573 |
{ |
574 |
const dlink_node *ptr = NULL; |
575 |
|
576 |
DLINK_FOREACH(ptr, list->head) |
577 |
{ |
578 |
const struct Ban *bp = ptr->data; |
579 |
|
580 |
if (!match(bp->name, who->name) && !match(bp->user, who->username)) |
581 |
{ |
582 |
switch (bp->type) |
583 |
{ |
584 |
case HM_HOST: |
585 |
if (!match(bp->host, who->host) || !match(bp->host, who->sockhost)) |
586 |
return 1; |
587 |
break; |
588 |
case HM_IPV4: |
589 |
if (who->localClient->aftype == AF_INET) |
590 |
if (match_ipv4(&who->localClient->ip, &bp->addr, bp->bits)) |
591 |
return 1; |
592 |
break; |
593 |
case HM_IPV6: |
594 |
if (who->localClient->aftype == AF_INET6) |
595 |
if (match_ipv6(&who->localClient->ip, &bp->addr, bp->bits)) |
596 |
return 1; |
597 |
break; |
598 |
default: |
599 |
assert(0); |
600 |
} |
601 |
} |
602 |
} |
603 |
|
604 |
return 0; |
605 |
} |
606 |
|
607 |
/*! |
608 |
* \param chptr Pointer to channel block |
609 |
* \param who Pointer to client to check access fo |
610 |
* \return 0 if not banned, 1 otherwise |
611 |
*/ |
612 |
int |
613 |
is_banned(const struct Channel *chptr, const struct Client *who) |
614 |
{ |
615 |
if (find_bmask(who, &chptr->banlist)) |
616 |
if (!find_bmask(who, &chptr->exceptlist)) |
617 |
return 1; |
618 |
|
619 |
return 0; |
620 |
} |
621 |
|
622 |
/*! Tests if a client can join a certain channel |
623 |
* \param source_p Pointer to client attempting to join |
624 |
* \param chptr Pointer to channel |
625 |
* \param key Key sent by client attempting to join if present |
626 |
* \return ERR_BANNEDFROMCHAN, ERR_INVITEONLYCHAN, ERR_CHANNELISFULL |
627 |
* or 0 if allowed to join. |
628 |
*/ |
629 |
int |
630 |
can_join(struct Client *source_p, struct Channel *chptr, const char *key) |
631 |
{ |
632 |
if ((chptr->mode.mode & MODE_SSLONLY) && !HasUMode(source_p, UMODE_SSL)) |
633 |
return ERR_SSLONLYCHAN; |
634 |
|
635 |
if ((chptr->mode.mode & MODE_REGONLY) && !HasUMode(source_p, UMODE_REGISTERED)) |
636 |
return ERR_NEEDREGGEDNICK; |
637 |
|
638 |
if ((chptr->mode.mode & MODE_OPERONLY) && !HasUMode(source_p, UMODE_OPER)) |
639 |
return ERR_OPERONLYCHAN; |
640 |
|
641 |
if (chptr->mode.mode & MODE_INVITEONLY) |
642 |
if (!dlinkFind(&source_p->localClient->invited, chptr)) |
643 |
if (!find_bmask(source_p, &chptr->invexlist)) |
644 |
return ERR_INVITEONLYCHAN; |
645 |
|
646 |
if (chptr->mode.key[0] && (!key || strcmp(chptr->mode.key, key))) |
647 |
return ERR_BADCHANNELKEY; |
648 |
|
649 |
if (chptr->mode.limit && dlink_list_length(&chptr->members) >= |
650 |
chptr->mode.limit) |
651 |
return ERR_CHANNELISFULL; |
652 |
|
653 |
if (is_banned(chptr, source_p)) |
654 |
return ERR_BANNEDFROMCHAN; |
655 |
|
656 |
return 0; |
657 |
} |
658 |
|
659 |
int |
660 |
has_member_flags(const struct Membership *ms, const unsigned int flags) |
661 |
{ |
662 |
return ms && (ms->flags & flags); |
663 |
} |
664 |
|
665 |
struct Membership * |
666 |
find_channel_link(struct Client *client_p, struct Channel *chptr) |
667 |
{ |
668 |
dlink_node *ptr = NULL; |
669 |
|
670 |
if (!IsClient(client_p)) |
671 |
return NULL; |
672 |
|
673 |
if (dlink_list_length(&chptr->members) < dlink_list_length(&client_p->channel)) |
674 |
{ |
675 |
DLINK_FOREACH(ptr, chptr->members.head) |
676 |
if (((struct Membership *)ptr->data)->client_p == client_p) |
677 |
return ptr->data; |
678 |
} |
679 |
else |
680 |
{ |
681 |
DLINK_FOREACH(ptr, client_p->channel.head) |
682 |
if (((struct Membership *)ptr->data)->chptr == chptr) |
683 |
return ptr->data; |
684 |
} |
685 |
|
686 |
return NULL; |
687 |
} |
688 |
|
689 |
/*! Tests if a client can send to a channel |
690 |
* \param message The actual message string the client wants to send |
691 |
* \return 1 if the message does contain any control codes, 0 otherwise |
692 |
*/ |
693 |
static int |
694 |
msg_has_ctrls(const char *message) |
695 |
{ |
696 |
const unsigned char *p = (const unsigned char *)message; |
697 |
|
698 |
for (; *p; ++p) |
699 |
{ |
700 |
if (*p > 31 || *p == 1) |
701 |
continue; /* No control code or CTCP */ |
702 |
|
703 |
if (*p == 27) /* Escape */ |
704 |
{ |
705 |
/* ISO 2022 charset shift sequence */ |
706 |
if (*(p + 1) == '$' || |
707 |
*(p + 1) == '(') |
708 |
{ |
709 |
++p; |
710 |
continue; |
711 |
} |
712 |
} |
713 |
|
714 |
return 1; /* Control code */ |
715 |
} |
716 |
|
717 |
return 0; |
718 |
} |
719 |
|
720 |
/*! Tests if a client can send to a channel |
721 |
* \param chptr Pointer to Channel struct |
722 |
* \param source_p Pointer to Client struct |
723 |
* \param ms Pointer to Membership struct (can be NULL) |
724 |
* \param message The actual message string the client wants to send |
725 |
* \return CAN_SEND_OPV if op or voiced on channel\n |
726 |
* CAN_SEND_NONOP if can send to channel but is not an op\n |
727 |
* ERR_CANNOTSENDTOCHAN or ERR_NEEDREGGEDNICK if they cannot send to channel\n |
728 |
*/ |
729 |
int |
730 |
can_send(struct Channel *chptr, struct Client *source_p, |
731 |
struct Membership *ms, const char *message) |
732 |
{ |
733 |
struct MaskItem *conf = NULL; |
734 |
|
735 |
if (IsServer(source_p) || HasFlag(source_p, FLAGS_SERVICE)) |
736 |
return CAN_SEND_OPV; |
737 |
|
738 |
if (MyClient(source_p) && !IsExemptResv(source_p)) |
739 |
if (!(HasUMode(source_p, UMODE_OPER) && ConfigGeneral.oper_pass_resv)) |
740 |
if ((conf = match_find_resv(chptr->chname)) && !resv_find_exempt(source_p, conf)) |
741 |
return ERR_CANNOTSENDTOCHAN; |
742 |
|
743 |
if ((chptr->mode.mode & MODE_NOCTRL) && msg_has_ctrls(message)) |
744 |
return ERR_NOCTRLSONCHAN; |
745 |
if (ms || (ms = find_channel_link(source_p, chptr))) |
746 |
if (ms->flags & (CHFL_CHANOP|CHFL_HALFOP|CHFL_VOICE)) |
747 |
return CAN_SEND_OPV; |
748 |
if (!ms && (chptr->mode.mode & MODE_NOPRIVMSGS)) |
749 |
return ERR_CANNOTSENDTOCHAN; |
750 |
if (chptr->mode.mode & MODE_MODERATED) |
751 |
return ERR_CANNOTSENDTOCHAN; |
752 |
if ((chptr->mode.mode & MODE_MODREG) && !HasUMode(source_p, UMODE_REGISTERED)) |
753 |
return ERR_NEEDREGGEDNICK; |
754 |
|
755 |
/* Cache can send if banned */ |
756 |
if (MyClient(source_p)) |
757 |
{ |
758 |
if (ms) |
759 |
{ |
760 |
if (ms->flags & CHFL_BAN_SILENCED) |
761 |
return ERR_CANNOTSENDTOCHAN; |
762 |
|
763 |
if (!(ms->flags & CHFL_BAN_CHECKED)) |
764 |
{ |
765 |
if (is_banned(chptr, source_p)) |
766 |
{ |
767 |
ms->flags |= (CHFL_BAN_CHECKED|CHFL_BAN_SILENCED); |
768 |
return ERR_CANNOTSENDTOCHAN; |
769 |
} |
770 |
|
771 |
ms->flags |= CHFL_BAN_CHECKED; |
772 |
} |
773 |
} |
774 |
else if (is_banned(chptr, source_p)) |
775 |
return ERR_CANNOTSENDTOCHAN; |
776 |
} |
777 |
|
778 |
return CAN_SEND_NONOP; |
779 |
} |
780 |
|
781 |
/*! \brief Updates the client's oper_warn_count_down, warns the |
782 |
* IRC operators if necessary, and updates |
783 |
* join_leave_countdown as needed. |
784 |
* \param source_p Pointer to struct Client to check |
785 |
* \param name Channel name or NULL if this is a part. |
786 |
*/ |
787 |
void |
788 |
check_spambot_warning(struct Client *source_p, const char *name) |
789 |
{ |
790 |
int t_delta = 0; |
791 |
int decrement_count = 0; |
792 |
|
793 |
if ((GlobalSetOptions.spam_num && |
794 |
(source_p->localClient->join_leave_count >= |
795 |
GlobalSetOptions.spam_num))) |
796 |
{ |
797 |
if (source_p->localClient->oper_warn_count_down > 0) |
798 |
source_p->localClient->oper_warn_count_down--; |
799 |
else |
800 |
source_p->localClient->oper_warn_count_down = 0; |
801 |
|
802 |
if (source_p->localClient->oper_warn_count_down == 0) |
803 |
{ |
804 |
/* It's already known as a possible spambot */ |
805 |
if (name) |
806 |
sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE, |
807 |
"User %s (%s@%s) trying to join %s is a possible spambot", |
808 |
source_p->name, source_p->username, |
809 |
source_p->host, name); |
810 |
else |
811 |
sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE, |
812 |
"User %s (%s@%s) is a possible spambot", |
813 |
source_p->name, source_p->username, |
814 |
source_p->host); |
815 |
source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN; |
816 |
} |
817 |
} |
818 |
else |
819 |
{ |
820 |
if ((t_delta = (CurrentTime - source_p->localClient->last_leave_time)) > |
821 |
JOIN_LEAVE_COUNT_EXPIRE_TIME) |
822 |
{ |
823 |
decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME); |
824 |
if (decrement_count > source_p->localClient->join_leave_count) |
825 |
source_p->localClient->join_leave_count = 0; |
826 |
else |
827 |
source_p->localClient->join_leave_count -= decrement_count; |
828 |
} |
829 |
else |
830 |
{ |
831 |
if ((CurrentTime - (source_p->localClient->last_join_time)) < |
832 |
GlobalSetOptions.spam_time) |
833 |
source_p->localClient->join_leave_count++; /* It's a possible spambot */ |
834 |
} |
835 |
|
836 |
if (name) |
837 |
source_p->localClient->last_join_time = CurrentTime; |
838 |
else |
839 |
source_p->localClient->last_leave_time = CurrentTime; |
840 |
} |
841 |
} |
842 |
|
843 |
/*! \brief Compares usercount and servercount against their split |
844 |
* values and adjusts splitmode accordingly |
845 |
* \param unused Unused address pointer |
846 |
*/ |
847 |
void |
848 |
check_splitmode(void *unused) |
849 |
{ |
850 |
if (splitchecking && (ConfigChannel.no_join_on_split || |
851 |
ConfigChannel.no_create_on_split)) |
852 |
{ |
853 |
const unsigned int server = dlink_list_length(&global_server_list); |
854 |
|
855 |
if (!splitmode && ((server < split_servers) || (Count.total < split_users))) |
856 |
{ |
857 |
splitmode = 1; |
858 |
|
859 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
860 |
"Network split, activating splitmode"); |
861 |
event_add(&splitmode_event, NULL); |
862 |
} |
863 |
else if (splitmode && (server >= split_servers) && (Count.total >= split_users)) |
864 |
{ |
865 |
splitmode = 0; |
866 |
|
867 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
868 |
"Network rejoined, deactivating splitmode"); |
869 |
event_delete(&splitmode_event); |
870 |
} |
871 |
} |
872 |
} |
873 |
|
874 |
/*! \brief Sets the channel topic for a certain channel |
875 |
* \param chptr Pointer to struct Channel |
876 |
* \param topic The topic string |
877 |
* \param topic_info n!u\@h formatted string of the topic setter |
878 |
* \param topicts Timestamp on the topic |
879 |
* \param local Whether the topic is set by a local client |
880 |
*/ |
881 |
void |
882 |
channel_set_topic(struct Channel *chptr, const char *topic, |
883 |
const char *topic_info, time_t topicts, int local) |
884 |
{ |
885 |
if (local) |
886 |
strlcpy(chptr->topic, topic, IRCD_MIN(sizeof(chptr->topic), ConfigServerInfo.max_topic_length + 1)); |
887 |
else |
888 |
strlcpy(chptr->topic, topic, sizeof(chptr->topic)); |
889 |
|
890 |
strlcpy(chptr->topic_info, topic_info, sizeof(chptr->topic_info)); |
891 |
chptr->topic_time = topicts; |
892 |
} |
893 |
|
894 |
/* do_join_0() |
895 |
* |
896 |
* inputs - pointer to client doing join 0 |
897 |
* output - NONE |
898 |
* side effects - Use has decided to join 0. This is legacy |
899 |
* from the days when channels were numbers not names. *sigh* |
900 |
* There is a bunch of evilness necessary here due to |
901 |
* anti spambot code. |
902 |
*/ |
903 |
void |
904 |
channel_do_join_0(struct Client *source_p) |
905 |
{ |
906 |
dlink_node *ptr = NULL, *ptr_next = NULL; |
907 |
|
908 |
if (source_p->channel.head) |
909 |
if (MyConnect(source_p) && !HasUMode(source_p, UMODE_OPER)) |
910 |
check_spambot_warning(source_p, NULL); |
911 |
|
912 |
DLINK_FOREACH_SAFE(ptr, ptr_next, source_p->channel.head) |
913 |
{ |
914 |
struct Channel *chptr = ((struct Membership *)ptr->data)->chptr; |
915 |
|
916 |
sendto_server(source_p, NOCAPS, NOCAPS, ":%s PART %s", |
917 |
source_p->id, chptr->chname); |
918 |
sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s PART %s", |
919 |
source_p->name, source_p->username, |
920 |
source_p->host, chptr->chname); |
921 |
|
922 |
remove_user_from_channel(ptr->data); |
923 |
} |
924 |
} |
925 |
|
926 |
static char * |
927 |
channel_find_last0(struct Client *source_p, char *chanlist) |
928 |
{ |
929 |
int join0 = 0; |
930 |
|
931 |
for (char *p = chanlist; *p; ++p) /* Find last "JOIN 0" */ |
932 |
{ |
933 |
if (*p == '0' && (*(p + 1) == ',' || *(p + 1) == '\0')) |
934 |
{ |
935 |
if ((*p + 1) == ',') |
936 |
++p; |
937 |
|
938 |
chanlist = p + 1; |
939 |
join0 = 1; |
940 |
} |
941 |
else |
942 |
{ |
943 |
while (*p != ',' && *p != '\0') /* Skip past channel name */ |
944 |
++p; |
945 |
|
946 |
if (*p == '\0') /* Hit the end */ |
947 |
break; |
948 |
} |
949 |
} |
950 |
|
951 |
if (join0) |
952 |
channel_do_join_0(source_p); |
953 |
|
954 |
return chanlist; |
955 |
} |
956 |
|
957 |
void |
958 |
channel_do_join(struct Client *source_p, char *channel, char *key_list) |
959 |
{ |
960 |
char *p = NULL; |
961 |
char *chan = NULL; |
962 |
char *chan_list = NULL; |
963 |
struct Channel *chptr = NULL; |
964 |
struct MaskItem *conf = NULL; |
965 |
const struct ClassItem *class = get_class_ptr(&source_p->localClient->confs); |
966 |
int i = 0; |
967 |
unsigned int flags = 0; |
968 |
|
969 |
chan_list = channel_find_last0(source_p, channel); |
970 |
|
971 |
for (chan = strtoken(&p, chan_list, ","); chan; |
972 |
chan = strtoken(&p, NULL, ",")) |
973 |
{ |
974 |
const char *key = NULL; |
975 |
|
976 |
/* If we have any more keys, take the first for this channel. */ |
977 |
if (!EmptyString(key_list) && (key_list = strchr(key = key_list, ','))) |
978 |
*key_list++ = '\0'; |
979 |
|
980 |
/* Empty keys are the same as no keys. */ |
981 |
if (key && *key == '\0') |
982 |
key = NULL; |
983 |
|
984 |
if (!check_channel_name(chan, 1)) |
985 |
{ |
986 |
sendto_one_numeric(source_p, &me, ERR_BADCHANNAME, chan); |
987 |
continue; |
988 |
} |
989 |
|
990 |
if (!IsExemptResv(source_p) && |
991 |
!(HasUMode(source_p, UMODE_OPER) && ConfigGeneral.oper_pass_resv) && |
992 |
((conf = match_find_resv(chan)) && !resv_find_exempt(source_p, conf))) |
993 |
{ |
994 |
++conf->count; |
995 |
sendto_one_numeric(source_p, &me, ERR_CHANBANREASON, |
996 |
chan, conf->reason ? conf->reason : "Reserved channel"); |
997 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
998 |
"Forbidding reserved channel %s from user %s", |
999 |
chan, get_client_name(source_p, HIDE_IP)); |
1000 |
continue; |
1001 |
} |
1002 |
|
1003 |
if (dlink_list_length(&source_p->channel) >= |
1004 |
((class->max_channels) ? class->max_channels : ConfigChannel.max_channels)) |
1005 |
{ |
1006 |
sendto_one_numeric(source_p, &me, ERR_TOOMANYCHANNELS, chan); |
1007 |
break; |
1008 |
} |
1009 |
|
1010 |
if ((chptr = hash_find_channel(chan))) |
1011 |
{ |
1012 |
if (IsMember(source_p, chptr)) |
1013 |
continue; |
1014 |
|
1015 |
if (splitmode && !HasUMode(source_p, UMODE_OPER) && |
1016 |
ConfigChannel.no_join_on_split) |
1017 |
{ |
1018 |
sendto_one_numeric(source_p, &me, ERR_UNAVAILRESOURCE, chptr->chname); |
1019 |
continue; |
1020 |
} |
1021 |
|
1022 |
/* |
1023 |
* can_join checks for +i key, bans. |
1024 |
*/ |
1025 |
if ((i = can_join(source_p, chptr, key))) |
1026 |
{ |
1027 |
sendto_one_numeric(source_p, &me, i, chptr->chname); |
1028 |
continue; |
1029 |
} |
1030 |
|
1031 |
/* |
1032 |
* This should never be the case unless there is some sort of |
1033 |
* persistant channels. |
1034 |
*/ |
1035 |
if (dlink_list_length(&chptr->members) == 0) |
1036 |
flags = CHFL_CHANOP; |
1037 |
else |
1038 |
flags = 0; |
1039 |
} |
1040 |
else |
1041 |
{ |
1042 |
if (splitmode && !HasUMode(source_p, UMODE_OPER) && |
1043 |
(ConfigChannel.no_create_on_split || ConfigChannel.no_join_on_split)) |
1044 |
{ |
1045 |
sendto_one_numeric(source_p, &me, ERR_UNAVAILRESOURCE, chan); |
1046 |
continue; |
1047 |
} |
1048 |
|
1049 |
flags = CHFL_CHANOP; |
1050 |
chptr = make_channel(chan); |
1051 |
} |
1052 |
|
1053 |
if (!HasUMode(source_p, UMODE_OPER)) |
1054 |
check_spambot_warning(source_p, chptr->chname); |
1055 |
|
1056 |
add_user_to_channel(chptr, source_p, flags, 1); |
1057 |
|
1058 |
/* |
1059 |
* Set timestamp if appropriate, and propagate |
1060 |
*/ |
1061 |
if (flags == CHFL_CHANOP) |
1062 |
{ |
1063 |
chptr->channelts = CurrentTime; |
1064 |
chptr->mode.mode |= MODE_TOPICLIMIT; |
1065 |
chptr->mode.mode |= MODE_NOPRIVMSGS; |
1066 |
|
1067 |
sendto_server(source_p, NOCAPS, NOCAPS, ":%s SJOIN %lu %s +nt :@%s", |
1068 |
me.id, (unsigned long)chptr->channelts, |
1069 |
chptr->chname, source_p->id); |
1070 |
|
1071 |
/* |
1072 |
* Notify all other users on the new channel |
1073 |
*/ |
1074 |
sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s", |
1075 |
source_p->name, source_p->username, |
1076 |
source_p->host, chptr->chname); |
1077 |
sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s +nt", |
1078 |
me.name, chptr->chname); |
1079 |
|
1080 |
if (source_p->away[0]) |
1081 |
sendto_channel_local_butone(source_p, 0, CAP_AWAY_NOTIFY, chptr, |
1082 |
":%s!%s@%s AWAY :%s", |
1083 |
source_p->name, source_p->username, |
1084 |
source_p->host, source_p->away); |
1085 |
} |
1086 |
else |
1087 |
{ |
1088 |
sendto_server(source_p, NOCAPS, NOCAPS, ":%s JOIN %lu %s +", |
1089 |
source_p->id, (unsigned long)chptr->channelts, |
1090 |
chptr->chname); |
1091 |
sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s", |
1092 |
source_p->name, source_p->username, |
1093 |
source_p->host, chptr->chname); |
1094 |
|
1095 |
if (source_p->away[0]) |
1096 |
sendto_channel_local_butone(source_p, 0, CAP_AWAY_NOTIFY, chptr, |
1097 |
":%s!%s@%s AWAY :%s", |
1098 |
source_p->name, source_p->username, |
1099 |
source_p->host, source_p->away); |
1100 |
} |
1101 |
|
1102 |
del_invite(chptr, source_p); |
1103 |
|
1104 |
if (chptr->topic[0]) |
1105 |
{ |
1106 |
sendto_one_numeric(source_p, &me, RPL_TOPIC, chptr->chname, chptr->topic); |
1107 |
sendto_one_numeric(source_p, &me, RPL_TOPICWHOTIME, chptr->chname, |
1108 |
chptr->topic_info, chptr->topic_time); |
1109 |
} |
1110 |
|
1111 |
channel_member_names(source_p, chptr, 1); |
1112 |
|
1113 |
source_p->localClient->last_join_time = CurrentTime; |
1114 |
} |
1115 |
} |
1116 |
|
1117 |
/*! \brief Removes a client from a specific channel |
1118 |
* \param source_p Pointer to source client to remove |
1119 |
* \param name Name of channel to remove from |
1120 |
* \param reason Part reason to show |
1121 |
*/ |
1122 |
static void |
1123 |
channel_part_one_client(struct Client *source_p, const char *name, const char *reason) |
1124 |
{ |
1125 |
struct Channel *chptr = NULL; |
1126 |
struct Membership *ms = NULL; |
1127 |
|
1128 |
if ((chptr = hash_find_channel(name)) == NULL) |
1129 |
{ |
1130 |
sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, name); |
1131 |
return; |
1132 |
} |
1133 |
|
1134 |
if ((ms = find_channel_link(source_p, chptr)) == NULL) |
1135 |
{ |
1136 |
sendto_one_numeric(source_p, &me, ERR_NOTONCHANNEL, chptr->chname); |
1137 |
return; |
1138 |
} |
1139 |
|
1140 |
if (MyConnect(source_p) && !HasUMode(source_p, UMODE_OPER)) |
1141 |
check_spambot_warning(source_p, NULL); |
1142 |
|
1143 |
/* |
1144 |
* Remove user from the old channel (if any) |
1145 |
* only allow /part reasons in -m chans |
1146 |
*/ |
1147 |
if (*reason && (!MyConnect(source_p) || |
1148 |
((can_send(chptr, source_p, ms, reason) && |
1149 |
(source_p->localClient->firsttime + ConfigGeneral.anti_spam_exit_message_time) |
1150 |
< CurrentTime)))) |
1151 |
{ |
1152 |
sendto_server(source_p, NOCAPS, NOCAPS, ":%s PART %s :%s", |
1153 |
source_p->id, chptr->chname, reason); |
1154 |
sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s PART %s :%s", |
1155 |
source_p->name, source_p->username, |
1156 |
source_p->host, chptr->chname, reason); |
1157 |
} |
1158 |
else |
1159 |
{ |
1160 |
sendto_server(source_p, NOCAPS, NOCAPS, ":%s PART %s", |
1161 |
source_p->id, chptr->chname); |
1162 |
sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s PART %s", |
1163 |
source_p->name, source_p->username, |
1164 |
source_p->host, chptr->chname); |
1165 |
} |
1166 |
|
1167 |
remove_user_from_channel(ms); |
1168 |
} |
1169 |
|
1170 |
void |
1171 |
channel_do_part(struct Client *source_p, char *channel, char *reason) |
1172 |
{ |
1173 |
char *p = NULL, *name = NULL; |
1174 |
char reasonbuf[KICKLEN + 1] = ""; |
1175 |
|
1176 |
if (!EmptyString(reason)) |
1177 |
strlcpy(reasonbuf, reason, sizeof(reasonbuf)); |
1178 |
|
1179 |
for (name = strtoken(&p, channel, ","); name; |
1180 |
name = strtoken(&p, NULL, ",")) |
1181 |
channel_part_one_client(source_p, name, reasonbuf); |
1182 |
} |