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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) 1997-2015 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 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); |
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add_capability("IE", CAP_IE); |
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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 *member = NULL; |
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|
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assert(IsClient(who)); |
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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->name); |
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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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member = mp_pool_get(member_pool); |
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member->client_p = who; |
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member->chptr = chptr; |
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member->flags = flags; |
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|
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dlinkAdd(member, &member->channode, &chptr->members); |
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|
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if (MyConnect(who)) |
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dlinkAdd(member, &member->locchannode, &chptr->locmembers); |
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|
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dlinkAdd(member, &member->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 *const client_p = member->client_p; |
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struct Channel *const 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, const 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 *node = 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->creationtime, |
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chptr->name, modebuf, parabuf); |
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|
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DLINK_FOREACH(node, chptr->members.head) |
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{ |
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const struct Membership *member = node->data; |
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|
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tlen = strlen(member->client_p->id) + 1; /* +1 for space */ |
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|
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if (member->flags & CHFL_CHANOP) |
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++tlen; |
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if (member->flags & CHFL_HALFOP) |
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++tlen; |
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if (member->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 (member->flags & CHFL_CHANOP) |
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*t++ = '@'; |
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if (member->flags & CHFL_HALFOP) |
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*t++ = '%'; |
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if (member->flags & CHFL_VOICE) |
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*t++ = '+'; |
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|
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strcpy(t, member->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, const 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 *node = 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) |
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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->creationtime, chptr->name, flag); |
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cur_len = mlen; |
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|
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DLINK_FOREACH(node, list->head) |
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{ |
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const struct Ban *ban = node->data; |
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|
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tlen = ban->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); |
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|
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cur_len = mlen; |
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pp = pbuf; |
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} |
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|
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pp += sprintf(pp, "%s!%s@%s ", ban->name, ban->user, ban->host); |
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cur_len += tlen; |
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} |
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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); |
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} |
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|
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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) |
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{ |
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char modebuf[MODEBUFLEN] = ""; |
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char parabuf[MODEBUFLEN] = ""; |
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|
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channel_modes(chptr, client_p, modebuf, parabuf); |
278 |
send_members(client_p, chptr, modebuf, parabuf); |
279 |
|
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send_mode_list(client_p, chptr, &chptr->banlist, 'b'); |
281 |
send_mode_list(client_p, chptr, &chptr->exceptlist, 'e'); |
282 |
send_mode_list(client_p, chptr, &chptr->invexlist, 'I'); |
283 |
} |
284 |
|
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/*! \brief Check channel name for invalid characters |
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* \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 |
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*/ |
290 |
int |
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check_channel_name(const char *name, const int local) |
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{ |
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const char *p = name; |
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|
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assert(!EmptyString(p)); |
296 |
|
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if (!IsChanPrefix(*p)) |
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return 0; |
299 |
|
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if (!local || !ConfigChannel.disable_fake_channels) |
301 |
{ |
302 |
while (*++p) |
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if (!IsChanChar(*p)) |
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return 0; |
305 |
} |
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else |
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{ |
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while (*++p) |
309 |
if (!IsVisibleChanChar(*p)) |
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return 0; |
311 |
} |
312 |
|
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return p - name <= CHANNELLEN; |
314 |
} |
315 |
|
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void |
317 |
remove_ban(struct Ban *ban, dlink_list *list) |
318 |
{ |
319 |
dlinkDelete(&ban->node, list); |
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mp_pool_release(ban); |
321 |
} |
322 |
|
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/* free_channel_list() |
324 |
* |
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* inputs - pointer to dlink_list |
326 |
* output - NONE |
327 |
* side effects - |
328 |
*/ |
329 |
void |
330 |
free_channel_list(dlink_list *list) |
331 |
{ |
332 |
dlink_node *node = NULL, *node_next = NULL; |
333 |
|
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DLINK_FOREACH_SAFE(node, node_next, list->head) |
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remove_ban(node->data, list); |
336 |
} |
337 |
|
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/*! \brief Get Channel block for name (and allocate a new channel |
339 |
* block, if it didn't exist before) |
340 |
* \param name Channel name |
341 |
* \return Channel block |
342 |
*/ |
343 |
struct Channel * |
344 |
make_channel(const char *name) |
345 |
{ |
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struct Channel *chptr = NULL; |
347 |
|
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assert(!EmptyString(name)); |
349 |
|
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chptr = mp_pool_get(channel_pool); |
351 |
|
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/* Doesn't hurt to set it here */ |
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chptr->creationtime = CurrentTime; |
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chptr->last_join_time = CurrentTime; |
355 |
|
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strlcpy(chptr->name, name, sizeof(chptr->name)); |
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dlinkAdd(chptr, &chptr->node, &channel_list); |
358 |
|
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hash_add_channel(chptr); |
360 |
|
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return chptr; |
362 |
} |
363 |
|
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/*! \brief Walk through this channel, and destroy it. |
365 |
* \param chptr Channel pointer |
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*/ |
367 |
void |
368 |
destroy_channel(struct Channel *chptr) |
369 |
{ |
370 |
clear_invites_channel(chptr); |
371 |
|
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/* Free ban/exception/invex lists */ |
373 |
free_channel_list(&chptr->banlist); |
374 |
free_channel_list(&chptr->exceptlist); |
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free_channel_list(&chptr->invexlist); |
376 |
|
377 |
dlinkDelete(&chptr->node, &channel_list); |
378 |
hash_del_channel(chptr); |
379 |
|
380 |
mp_pool_release(chptr); |
381 |
} |
382 |
|
383 |
/*! |
384 |
* \param chptr Pointer to channel |
385 |
* \return String pointer "=" if public, "@" if secret else "*" |
386 |
*/ |
387 |
static const char * |
388 |
channel_pub_or_secret(const struct Channel *chptr) |
389 |
{ |
390 |
if (SecretChannel(chptr)) |
391 |
return "@"; |
392 |
if (PrivateChannel(chptr)) |
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return "*"; |
394 |
return "="; |
395 |
} |
396 |
|
397 |
/*! \brief lists all names on given channel |
398 |
* \param source_p Pointer to client struct requesting names |
399 |
* \param chptr Pointer to channel block |
400 |
* \param show_eon Show RPL_ENDOFNAMES numeric or not |
401 |
* (don't want it with /names with no params) |
402 |
*/ |
403 |
void |
404 |
channel_member_names(struct Client *source_p, struct Channel *chptr, |
405 |
int show_eon) |
406 |
{ |
407 |
const dlink_node *node = NULL; |
408 |
char buf[IRCD_BUFSIZE + 1] = ""; |
409 |
char *t = NULL, *start = NULL; |
410 |
int tlen = 0; |
411 |
const int is_member = IsMember(source_p, chptr); |
412 |
const int multi_prefix = HasCap(source_p, CAP_MULTI_PREFIX) != 0; |
413 |
const int uhnames = HasCap(source_p, CAP_UHNAMES) != 0; |
414 |
|
415 |
assert(IsClient(source_p)); |
416 |
|
417 |
if (PubChannel(chptr) || is_member) |
418 |
{ |
419 |
t = buf + snprintf(buf, sizeof(buf), numeric_form(RPL_NAMREPLY), |
420 |
me.name, source_p->name, |
421 |
channel_pub_or_secret(chptr), chptr->name); |
422 |
start = t; |
423 |
|
424 |
DLINK_FOREACH(node, chptr->members.head) |
425 |
{ |
426 |
const struct Membership *member = node->data; |
427 |
|
428 |
if (HasUMode(member->client_p, UMODE_INVISIBLE) && !is_member) |
429 |
continue; |
430 |
|
431 |
if (!uhnames) |
432 |
tlen = strlen(member->client_p->name) + 1; /* +1 for space */ |
433 |
else |
434 |
tlen = strlen(member->client_p->name) + strlen(member->client_p->username) + |
435 |
strlen(member->client_p->host) + 3; /* +3 for ! + @ + space */ |
436 |
|
437 |
if (!multi_prefix) |
438 |
{ |
439 |
if (member->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE)) |
440 |
++tlen; |
441 |
} |
442 |
else |
443 |
{ |
444 |
if (member->flags & CHFL_CHANOP) |
445 |
++tlen; |
446 |
if (member->flags & CHFL_HALFOP) |
447 |
++tlen; |
448 |
if (member->flags & CHFL_VOICE) |
449 |
++tlen; |
450 |
} |
451 |
|
452 |
if (t + tlen - buf > IRCD_BUFSIZE - 2) |
453 |
{ |
454 |
*(t - 1) = '\0'; |
455 |
sendto_one(source_p, "%s", buf); |
456 |
t = start; |
457 |
} |
458 |
|
459 |
if (!uhnames) |
460 |
t += sprintf(t, "%s%s ", get_member_status(member, multi_prefix), |
461 |
member->client_p->name); |
462 |
else |
463 |
t += sprintf(t, "%s%s!%s@%s ", get_member_status(member, multi_prefix), |
464 |
member->client_p->name, member->client_p->username, |
465 |
member->client_p->host); |
466 |
} |
467 |
|
468 |
if (tlen) |
469 |
{ |
470 |
*(t - 1) = '\0'; |
471 |
sendto_one(source_p, "%s", buf); |
472 |
} |
473 |
} |
474 |
|
475 |
if (show_eon) |
476 |
sendto_one_numeric(source_p, &me, RPL_ENDOFNAMES, chptr->name); |
477 |
} |
478 |
|
479 |
/*! \brief Adds client to invite list |
480 |
* \param chptr Pointer to channel block |
481 |
* \param who Pointer to client to add invite to |
482 |
*/ |
483 |
void |
484 |
add_invite(struct Channel *chptr, struct Client *who) |
485 |
{ |
486 |
assert(IsClient(who)); |
487 |
|
488 |
del_invite(chptr, who); |
489 |
|
490 |
/* |
491 |
* Delete last link in chain if the list is max length |
492 |
*/ |
493 |
if (dlink_list_length(&who->connection->invited) >= |
494 |
ConfigChannel.max_channels) |
495 |
del_invite(who->connection->invited.tail->data, who); |
496 |
|
497 |
/* Add client to channel invite list */ |
498 |
dlinkAdd(who, make_dlink_node(), &chptr->invites); |
499 |
|
500 |
/* Add channel to the end of the client invite list */ |
501 |
dlinkAdd(chptr, make_dlink_node(), &who->connection->invited); |
502 |
} |
503 |
|
504 |
/*! \brief Delete Invite block from channel invite list |
505 |
* and client invite list |
506 |
* \param chptr Pointer to Channel struct |
507 |
* \param who Pointer to client to remove invites from |
508 |
*/ |
509 |
void |
510 |
del_invite(struct Channel *chptr, struct Client *who) |
511 |
{ |
512 |
dlink_node *node = NULL; |
513 |
|
514 |
if ((node = dlinkFindDelete(&who->connection->invited, chptr))) |
515 |
free_dlink_node(node); |
516 |
|
517 |
if ((node = dlinkFindDelete(&chptr->invites, who))) |
518 |
free_dlink_node(node); |
519 |
} |
520 |
|
521 |
/*! \brief Removes all invites of a specific channel |
522 |
* \param chptr Pointer to Channel struct |
523 |
*/ |
524 |
void |
525 |
clear_invites_channel(struct Channel *chptr) |
526 |
{ |
527 |
dlink_node *node = NULL, *node_next = NULL; |
528 |
|
529 |
DLINK_FOREACH_SAFE(node, node_next, chptr->invites.head) |
530 |
del_invite(chptr, node->data); |
531 |
} |
532 |
|
533 |
/*! \brief Removes all invites of a specific client |
534 |
* \param source_p Pointer to Client struct |
535 |
*/ |
536 |
void |
537 |
clear_invites_client(struct Client *source_p) |
538 |
{ |
539 |
dlink_node *node = NULL, *node_next = NULL; |
540 |
|
541 |
DLINK_FOREACH_SAFE(node, node_next, source_p->connection->invited.head) |
542 |
del_invite(node->data, source_p); |
543 |
} |
544 |
|
545 |
/* get_member_status() |
546 |
* |
547 |
* inputs - pointer to struct Membership |
548 |
* - YES if we can combine different flags |
549 |
* output - string either @, +, % or "" depending on whether |
550 |
* chanop, voiced or user |
551 |
* side effects - |
552 |
* |
553 |
* NOTE: Returned string is usually a static buffer |
554 |
* (like in get_client_name) |
555 |
*/ |
556 |
const char * |
557 |
get_member_status(const struct Membership *member, const int combine) |
558 |
{ |
559 |
static char buffer[4]; /* 4 for @%+\0 */ |
560 |
char *p = buffer; |
561 |
|
562 |
if (member->flags & CHFL_CHANOP) |
563 |
{ |
564 |
if (!combine) |
565 |
return "@"; |
566 |
*p++ = '@'; |
567 |
} |
568 |
|
569 |
if (member->flags & CHFL_HALFOP) |
570 |
{ |
571 |
if (!combine) |
572 |
return "%"; |
573 |
*p++ = '%'; |
574 |
} |
575 |
|
576 |
if (member->flags & CHFL_VOICE) |
577 |
*p++ = '+'; |
578 |
*p = '\0'; |
579 |
|
580 |
return buffer; |
581 |
} |
582 |
|
583 |
/*! |
584 |
* \param who Pointer to Client to check |
585 |
* \param list Pointer to ban list to search |
586 |
* \return 1 if ban found for given n!u\@h mask, 0 otherwise |
587 |
*/ |
588 |
static int |
589 |
find_bmask(const struct Client *who, const dlink_list *const list) |
590 |
{ |
591 |
const dlink_node *node = NULL; |
592 |
|
593 |
DLINK_FOREACH(node, list->head) |
594 |
{ |
595 |
const struct Ban *ban = node->data; |
596 |
|
597 |
if (!match(ban->name, who->name) && !match(ban->user, who->username)) |
598 |
{ |
599 |
switch (ban->type) |
600 |
{ |
601 |
case HM_HOST: |
602 |
if (!match(ban->host, who->host) || !match(ban->host, who->sockhost)) |
603 |
return 1; |
604 |
break; |
605 |
case HM_IPV4: |
606 |
if (who->connection->aftype == AF_INET) |
607 |
if (match_ipv4(&who->connection->ip, &ban->addr, ban->bits)) |
608 |
return 1; |
609 |
break; |
610 |
case HM_IPV6: |
611 |
if (who->connection->aftype == AF_INET6) |
612 |
if (match_ipv6(&who->connection->ip, &ban->addr, ban->bits)) |
613 |
return 1; |
614 |
break; |
615 |
default: |
616 |
assert(0); |
617 |
} |
618 |
} |
619 |
} |
620 |
|
621 |
return 0; |
622 |
} |
623 |
|
624 |
/*! |
625 |
* \param chptr Pointer to channel block |
626 |
* \param who Pointer to client to check access fo |
627 |
* \return 0 if not banned, 1 otherwise |
628 |
*/ |
629 |
int |
630 |
is_banned(const struct Channel *chptr, const struct Client *who) |
631 |
{ |
632 |
if (find_bmask(who, &chptr->banlist)) |
633 |
if (!find_bmask(who, &chptr->exceptlist)) |
634 |
return 1; |
635 |
|
636 |
return 0; |
637 |
} |
638 |
|
639 |
/*! Tests if a client can join a certain channel |
640 |
* \param source_p Pointer to client attempting to join |
641 |
* \param chptr Pointer to channel |
642 |
* \param key Key sent by client attempting to join if present |
643 |
* \return ERR_BANNEDFROMCHAN, ERR_INVITEONLYCHAN, ERR_CHANNELISFULL |
644 |
* or 0 if allowed to join. |
645 |
*/ |
646 |
int |
647 |
can_join(struct Client *source_p, const struct Channel *chptr, const char *key) |
648 |
{ |
649 |
if ((chptr->mode.mode & MODE_SSLONLY) && !HasUMode(source_p, UMODE_SSL)) |
650 |
return ERR_SSLONLYCHAN; |
651 |
|
652 |
if ((chptr->mode.mode & MODE_REGONLY) && !HasUMode(source_p, UMODE_REGISTERED)) |
653 |
return ERR_NEEDREGGEDNICK; |
654 |
|
655 |
if ((chptr->mode.mode & MODE_OPERONLY) && !HasUMode(source_p, UMODE_OPER)) |
656 |
return ERR_OPERONLYCHAN; |
657 |
|
658 |
if (chptr->mode.mode & MODE_INVITEONLY) |
659 |
if (!dlinkFind(&source_p->connection->invited, chptr)) |
660 |
if (!find_bmask(source_p, &chptr->invexlist)) |
661 |
return ERR_INVITEONLYCHAN; |
662 |
|
663 |
if (chptr->mode.key[0] && (!key || strcmp(chptr->mode.key, key))) |
664 |
return ERR_BADCHANNELKEY; |
665 |
|
666 |
if (chptr->mode.limit && dlink_list_length(&chptr->members) >= |
667 |
chptr->mode.limit) |
668 |
return ERR_CHANNELISFULL; |
669 |
|
670 |
if (is_banned(chptr, source_p)) |
671 |
return ERR_BANNEDFROMCHAN; |
672 |
|
673 |
return 0; |
674 |
} |
675 |
|
676 |
int |
677 |
has_member_flags(const struct Membership *member, const unsigned int flags) |
678 |
{ |
679 |
return member && (member->flags & flags); |
680 |
} |
681 |
|
682 |
struct Membership * |
683 |
find_channel_link(struct Client *client_p, struct Channel *chptr) |
684 |
{ |
685 |
dlink_node *node = NULL; |
686 |
|
687 |
if (!IsClient(client_p)) |
688 |
return NULL; |
689 |
|
690 |
if (dlink_list_length(&chptr->members) < dlink_list_length(&client_p->channel)) |
691 |
{ |
692 |
DLINK_FOREACH(node, chptr->members.head) |
693 |
if (((struct Membership *)node->data)->client_p == client_p) |
694 |
return node->data; |
695 |
} |
696 |
else |
697 |
{ |
698 |
DLINK_FOREACH(node, client_p->channel.head) |
699 |
if (((struct Membership *)node->data)->chptr == chptr) |
700 |
return node->data; |
701 |
} |
702 |
|
703 |
return NULL; |
704 |
} |
705 |
|
706 |
/*! Checks if a message contains control codes |
707 |
* \param message The actual message string the client wants to send |
708 |
* \return 1 if the message does contain any control codes, 0 otherwise |
709 |
*/ |
710 |
static int |
711 |
msg_has_ctrls(const char *message) |
712 |
{ |
713 |
const unsigned char *p = (const unsigned char *)message; |
714 |
|
715 |
for (; *p; ++p) |
716 |
{ |
717 |
if (*p > 31 || *p == 1) |
718 |
continue; /* No control code or CTCP */ |
719 |
|
720 |
if (*p == 27) /* Escape */ |
721 |
{ |
722 |
/* ISO 2022 charset shift sequence */ |
723 |
if (*(p + 1) == '$' || |
724 |
*(p + 1) == '(') |
725 |
{ |
726 |
++p; |
727 |
continue; |
728 |
} |
729 |
} |
730 |
|
731 |
return 1; /* Control code */ |
732 |
} |
733 |
|
734 |
return 0; /* No control code found */ |
735 |
} |
736 |
|
737 |
/*! Tests if a client can send to a channel |
738 |
* \param chptr Pointer to Channel struct |
739 |
* \param source_p Pointer to Client struct |
740 |
* \param member Pointer to Membership struct (can be NULL) |
741 |
* \param message The actual message string the client wants to send |
742 |
* \return CAN_SEND_OPV if op or voiced on channel\n |
743 |
* CAN_SEND_NONOP if can send to channel but is not an op\n |
744 |
* ERR_CANNOTSENDTOCHAN or ERR_NEEDREGGEDNICK if they cannot send to channel\n |
745 |
*/ |
746 |
int |
747 |
can_send(struct Channel *chptr, struct Client *source_p, |
748 |
struct Membership *member, const char *message) |
749 |
{ |
750 |
const struct MaskItem *conf = NULL; |
751 |
|
752 |
if (IsServer(source_p) || HasFlag(source_p, FLAGS_SERVICE)) |
753 |
return CAN_SEND_OPV; |
754 |
|
755 |
if (MyClient(source_p) && !HasFlag(source_p, FLAGS_EXEMPTRESV)) |
756 |
if (!(HasUMode(source_p, UMODE_OPER) && ConfigGeneral.oper_pass_resv)) |
757 |
if ((conf = match_find_resv(chptr->name)) && !resv_find_exempt(source_p, conf)) |
758 |
return ERR_CANNOTSENDTOCHAN; |
759 |
|
760 |
if ((chptr->mode.mode & MODE_NOCTRL) && msg_has_ctrls(message)) |
761 |
return ERR_NOCTRLSONCHAN; |
762 |
|
763 |
if (chptr->mode.mode & MODE_NOCTCP) |
764 |
if (*message == '\001' && strncmp(message + 1, "ACTION ", 7)) |
765 |
return ERR_NOCTCP; |
766 |
|
767 |
if (member || (member = find_channel_link(source_p, chptr))) |
768 |
if (member->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE)) |
769 |
return CAN_SEND_OPV; |
770 |
|
771 |
if (!member && (chptr->mode.mode & MODE_NOPRIVMSGS)) |
772 |
return ERR_CANNOTSENDTOCHAN; |
773 |
|
774 |
if (chptr->mode.mode & MODE_MODERATED) |
775 |
return ERR_CANNOTSENDTOCHAN; |
776 |
|
777 |
if ((chptr->mode.mode & MODE_MODREG) && !HasUMode(source_p, UMODE_REGISTERED)) |
778 |
return ERR_NEEDREGGEDNICK; |
779 |
|
780 |
/* Cache can send if banned */ |
781 |
if (MyClient(source_p)) |
782 |
{ |
783 |
if (member) |
784 |
{ |
785 |
if (member->flags & CHFL_BAN_SILENCED) |
786 |
return ERR_CANNOTSENDTOCHAN; |
787 |
|
788 |
if (!(member->flags & CHFL_BAN_CHECKED)) |
789 |
{ |
790 |
if (is_banned(chptr, source_p)) |
791 |
{ |
792 |
member->flags |= (CHFL_BAN_CHECKED | CHFL_BAN_SILENCED); |
793 |
return ERR_CANNOTSENDTOCHAN; |
794 |
} |
795 |
|
796 |
member->flags |= CHFL_BAN_CHECKED; |
797 |
} |
798 |
} |
799 |
else if (is_banned(chptr, source_p)) |
800 |
return ERR_CANNOTSENDTOCHAN; |
801 |
} |
802 |
|
803 |
return CAN_SEND_NONOP; |
804 |
} |
805 |
|
806 |
/*! \brief Updates the client's oper_warn_count_down, warns the |
807 |
* IRC operators if necessary, and updates |
808 |
* join_leave_countdown as needed. |
809 |
* \param source_p Pointer to struct Client to check |
810 |
* \param name Channel name or NULL if this is a part. |
811 |
*/ |
812 |
void |
813 |
check_spambot_warning(struct Client *source_p, const char *name) |
814 |
{ |
815 |
int t_delta = 0; |
816 |
int decrement_count = 0; |
817 |
|
818 |
if ((GlobalSetOptions.spam_num && |
819 |
(source_p->connection->join_leave_count >= |
820 |
GlobalSetOptions.spam_num))) |
821 |
{ |
822 |
if (source_p->connection->oper_warn_count_down > 0) |
823 |
source_p->connection->oper_warn_count_down--; |
824 |
else |
825 |
source_p->connection->oper_warn_count_down = 0; |
826 |
|
827 |
if (source_p->connection->oper_warn_count_down == 0) |
828 |
{ |
829 |
/* It's already known as a possible spambot */ |
830 |
if (name) |
831 |
sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE, |
832 |
"User %s (%s@%s) trying to join %s is a possible spambot", |
833 |
source_p->name, source_p->username, |
834 |
source_p->host, name); |
835 |
else |
836 |
sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE, |
837 |
"User %s (%s@%s) is a possible spambot", |
838 |
source_p->name, source_p->username, |
839 |
source_p->host); |
840 |
source_p->connection->oper_warn_count_down = OPER_SPAM_COUNTDOWN; |
841 |
} |
842 |
} |
843 |
else |
844 |
{ |
845 |
if ((t_delta = (CurrentTime - source_p->connection->last_leave_time)) > |
846 |
JOIN_LEAVE_COUNT_EXPIRE_TIME) |
847 |
{ |
848 |
decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME); |
849 |
|
850 |
if (decrement_count > source_p->connection->join_leave_count) |
851 |
source_p->connection->join_leave_count = 0; |
852 |
else |
853 |
source_p->connection->join_leave_count -= decrement_count; |
854 |
} |
855 |
else |
856 |
{ |
857 |
if ((CurrentTime - (source_p->connection->last_join_time)) < |
858 |
GlobalSetOptions.spam_time) |
859 |
source_p->connection->join_leave_count++; /* It's a possible spambot */ |
860 |
} |
861 |
|
862 |
if (name) |
863 |
source_p->connection->last_join_time = CurrentTime; |
864 |
else |
865 |
source_p->connection->last_leave_time = CurrentTime; |
866 |
} |
867 |
} |
868 |
|
869 |
/*! \brief Compares usercount and servercount against their split |
870 |
* values and adjusts splitmode accordingly |
871 |
* \param unused Unused address pointer |
872 |
*/ |
873 |
void |
874 |
check_splitmode(void *unused) |
875 |
{ |
876 |
if (splitchecking && (ConfigChannel.no_join_on_split || |
877 |
ConfigChannel.no_create_on_split)) |
878 |
{ |
879 |
const unsigned int server = dlink_list_length(&global_server_list); |
880 |
|
881 |
if (!splitmode && ((server < split_servers) || (Count.total < split_users))) |
882 |
{ |
883 |
splitmode = 1; |
884 |
|
885 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
886 |
"Network split, activating splitmode"); |
887 |
event_add(&splitmode_event, NULL); |
888 |
} |
889 |
else if (splitmode && (server >= split_servers) && (Count.total >= split_users)) |
890 |
{ |
891 |
splitmode = 0; |
892 |
|
893 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
894 |
"Network rejoined, deactivating splitmode"); |
895 |
event_delete(&splitmode_event); |
896 |
} |
897 |
} |
898 |
} |
899 |
|
900 |
/*! \brief Sets the channel topic for a certain channel |
901 |
* \param chptr Pointer to struct Channel |
902 |
* \param topic The topic string |
903 |
* \param topic_info n!u\@h formatted string of the topic setter |
904 |
* \param topicts Timestamp on the topic |
905 |
* \param local Whether the topic is set by a local client |
906 |
*/ |
907 |
void |
908 |
channel_set_topic(struct Channel *chptr, const char *topic, |
909 |
const char *topic_info, time_t topicts, int local) |
910 |
{ |
911 |
if (local) |
912 |
strlcpy(chptr->topic, topic, IRCD_MIN(sizeof(chptr->topic), ConfigServerInfo.max_topic_length + 1)); |
913 |
else |
914 |
strlcpy(chptr->topic, topic, sizeof(chptr->topic)); |
915 |
|
916 |
strlcpy(chptr->topic_info, topic_info, sizeof(chptr->topic_info)); |
917 |
chptr->topic_time = topicts; |
918 |
} |
919 |
|
920 |
/* do_join_0() |
921 |
* |
922 |
* inputs - pointer to client doing join 0 |
923 |
* output - NONE |
924 |
* side effects - Use has decided to join 0. This is legacy |
925 |
* from the days when channels were numbers not names. *sigh* |
926 |
* There is a bunch of evilness necessary here due to |
927 |
* anti spambot code. |
928 |
*/ |
929 |
void |
930 |
channel_do_join_0(struct Client *source_p) |
931 |
{ |
932 |
dlink_node *node = NULL, *node_next = NULL; |
933 |
|
934 |
if (source_p->channel.head) |
935 |
if (MyConnect(source_p) && !HasUMode(source_p, UMODE_OPER)) |
936 |
check_spambot_warning(source_p, NULL); |
937 |
|
938 |
DLINK_FOREACH_SAFE(node, node_next, source_p->channel.head) |
939 |
{ |
940 |
struct Channel *chptr = ((struct Membership *)node->data)->chptr; |
941 |
|
942 |
sendto_server(source_p, 0, 0, ":%s PART %s", |
943 |
source_p->id, chptr->name); |
944 |
sendto_channel_local(0, chptr, ":%s!%s@%s PART %s", |
945 |
source_p->name, source_p->username, |
946 |
source_p->host, chptr->name); |
947 |
|
948 |
remove_user_from_channel(node->data); |
949 |
} |
950 |
} |
951 |
|
952 |
static char * |
953 |
channel_find_last0(struct Client *source_p, char *chanlist) |
954 |
{ |
955 |
int join0 = 0; |
956 |
|
957 |
for (char *p = chanlist; *p; ++p) /* Find last "JOIN 0" */ |
958 |
{ |
959 |
if (*p == '0' && (*(p + 1) == ',' || *(p + 1) == '\0')) |
960 |
{ |
961 |
if (*(p + 1) == ',') |
962 |
++p; |
963 |
|
964 |
chanlist = p + 1; |
965 |
join0 = 1; |
966 |
} |
967 |
else |
968 |
{ |
969 |
while (*p != ',' && *p != '\0') /* Skip past channel name */ |
970 |
++p; |
971 |
|
972 |
if (*p == '\0') /* Hit the end */ |
973 |
break; |
974 |
} |
975 |
} |
976 |
|
977 |
if (join0) |
978 |
channel_do_join_0(source_p); |
979 |
|
980 |
return chanlist; |
981 |
} |
982 |
|
983 |
void |
984 |
channel_do_join(struct Client *source_p, char *channel, char *key_list) |
985 |
{ |
986 |
char *p = NULL; |
987 |
char *chan = NULL; |
988 |
char *chan_list = NULL; |
989 |
struct Channel *chptr = NULL; |
990 |
struct MaskItem *conf = NULL; |
991 |
const struct ClassItem *const class = get_class_ptr(&source_p->connection->confs); |
992 |
int i = 0; |
993 |
unsigned int flags = 0; |
994 |
|
995 |
assert(IsClient(source_p)); |
996 |
|
997 |
chan_list = channel_find_last0(source_p, channel); |
998 |
|
999 |
for (chan = strtoken(&p, chan_list, ","); chan; |
1000 |
chan = strtoken(&p, NULL, ",")) |
1001 |
{ |
1002 |
const char *key = NULL; |
1003 |
|
1004 |
/* If we have any more keys, take the first for this channel. */ |
1005 |
if (!EmptyString(key_list) && (key_list = strchr(key = key_list, ','))) |
1006 |
*key_list++ = '\0'; |
1007 |
|
1008 |
/* Empty keys are the same as no keys. */ |
1009 |
if (key && *key == '\0') |
1010 |
key = NULL; |
1011 |
|
1012 |
if (!check_channel_name(chan, 1)) |
1013 |
{ |
1014 |
sendto_one_numeric(source_p, &me, ERR_BADCHANNAME, chan); |
1015 |
continue; |
1016 |
} |
1017 |
|
1018 |
if (!HasFlag(source_p, FLAGS_EXEMPTRESV) && |
1019 |
!(HasUMode(source_p, UMODE_OPER) && ConfigGeneral.oper_pass_resv) && |
1020 |
((conf = match_find_resv(chan)) && !resv_find_exempt(source_p, conf))) |
1021 |
{ |
1022 |
++conf->count; |
1023 |
sendto_one_numeric(source_p, &me, ERR_CHANBANREASON, chan, conf->reason); |
1024 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
1025 |
"Forbidding reserved channel %s from user %s", |
1026 |
chan, get_client_name(source_p, HIDE_IP)); |
1027 |
continue; |
1028 |
} |
1029 |
|
1030 |
if (dlink_list_length(&source_p->channel) >= |
1031 |
((class->max_channels) ? class->max_channels : ConfigChannel.max_channels)) |
1032 |
{ |
1033 |
sendto_one_numeric(source_p, &me, ERR_TOOMANYCHANNELS, chan); |
1034 |
break; |
1035 |
} |
1036 |
|
1037 |
if ((chptr = hash_find_channel(chan))) |
1038 |
{ |
1039 |
if (IsMember(source_p, chptr)) |
1040 |
continue; |
1041 |
|
1042 |
if (splitmode && !HasUMode(source_p, UMODE_OPER) && |
1043 |
ConfigChannel.no_join_on_split) |
1044 |
{ |
1045 |
sendto_one_numeric(source_p, &me, ERR_UNAVAILRESOURCE, chptr->name); |
1046 |
continue; |
1047 |
} |
1048 |
|
1049 |
/* |
1050 |
* can_join checks for +i key, bans. |
1051 |
*/ |
1052 |
if ((i = can_join(source_p, chptr, key))) |
1053 |
{ |
1054 |
sendto_one_numeric(source_p, &me, i, chptr->name); |
1055 |
continue; |
1056 |
} |
1057 |
|
1058 |
/* |
1059 |
* This should never be the case unless there is some sort of |
1060 |
* persistant channels. |
1061 |
*/ |
1062 |
if (!dlink_list_length(&chptr->members)) |
1063 |
flags = CHFL_CHANOP; |
1064 |
else |
1065 |
flags = 0; |
1066 |
} |
1067 |
else |
1068 |
{ |
1069 |
if (splitmode && !HasUMode(source_p, UMODE_OPER) && |
1070 |
(ConfigChannel.no_create_on_split || ConfigChannel.no_join_on_split)) |
1071 |
{ |
1072 |
sendto_one_numeric(source_p, &me, ERR_UNAVAILRESOURCE, chan); |
1073 |
continue; |
1074 |
} |
1075 |
|
1076 |
flags = CHFL_CHANOP; |
1077 |
chptr = make_channel(chan); |
1078 |
} |
1079 |
|
1080 |
if (!HasUMode(source_p, UMODE_OPER)) |
1081 |
check_spambot_warning(source_p, chptr->name); |
1082 |
|
1083 |
add_user_to_channel(chptr, source_p, flags, 1); |
1084 |
|
1085 |
/* |
1086 |
* Set timestamp if appropriate, and propagate |
1087 |
*/ |
1088 |
if (flags == CHFL_CHANOP) |
1089 |
{ |
1090 |
chptr->creationtime = CurrentTime; |
1091 |
chptr->mode.mode |= MODE_TOPICLIMIT; |
1092 |
chptr->mode.mode |= MODE_NOPRIVMSGS; |
1093 |
|
1094 |
sendto_server(source_p, 0, 0, ":%s SJOIN %lu %s +nt :@%s", |
1095 |
me.id, (unsigned long)chptr->creationtime, |
1096 |
chptr->name, source_p->id); |
1097 |
|
1098 |
/* |
1099 |
* Notify all other users on the new channel |
1100 |
*/ |
1101 |
sendto_channel_local_butone(NULL, CAP_EXTENDED_JOIN, 0, chptr, ":%s!%s@%s JOIN %s %s :%s", |
1102 |
source_p->name, source_p->username, |
1103 |
source_p->host, chptr->name, |
1104 |
(!IsDigit(source_p->account[0]) && source_p->account[0] != '*') ? source_p->account : "*", |
1105 |
source_p->info); |
1106 |
sendto_channel_local_butone(NULL, 0, CAP_EXTENDED_JOIN, chptr, ":%s!%s@%s JOIN :%s", |
1107 |
source_p->name, source_p->username, |
1108 |
source_p->host, chptr->name); |
1109 |
sendto_channel_local(0, chptr, ":%s MODE %s +nt", |
1110 |
me.name, chptr->name); |
1111 |
|
1112 |
if (source_p->away[0]) |
1113 |
sendto_channel_local_butone(source_p, CAP_AWAY_NOTIFY, 0, chptr, |
1114 |
":%s!%s@%s AWAY :%s", |
1115 |
source_p->name, source_p->username, |
1116 |
source_p->host, source_p->away); |
1117 |
} |
1118 |
else |
1119 |
{ |
1120 |
sendto_server(source_p, 0, 0, ":%s JOIN %lu %s +", |
1121 |
source_p->id, (unsigned long)chptr->creationtime, |
1122 |
chptr->name); |
1123 |
|
1124 |
sendto_channel_local_butone(NULL, CAP_EXTENDED_JOIN, 0, chptr, ":%s!%s@%s JOIN %s %s :%s", |
1125 |
source_p->name, source_p->username, |
1126 |
source_p->host, chptr->name, |
1127 |
(!IsDigit(source_p->account[0]) && source_p->account[0] != '*') ? source_p->account : "*", |
1128 |
source_p->info); |
1129 |
sendto_channel_local_butone(NULL, 0, CAP_EXTENDED_JOIN, chptr, ":%s!%s@%s JOIN :%s", |
1130 |
source_p->name, source_p->username, |
1131 |
source_p->host, chptr->name); |
1132 |
|
1133 |
if (source_p->away[0]) |
1134 |
sendto_channel_local_butone(source_p, CAP_AWAY_NOTIFY, 0, chptr, |
1135 |
":%s!%s@%s AWAY :%s", |
1136 |
source_p->name, source_p->username, |
1137 |
source_p->host, source_p->away); |
1138 |
} |
1139 |
|
1140 |
del_invite(chptr, source_p); |
1141 |
|
1142 |
if (chptr->topic[0]) |
1143 |
{ |
1144 |
sendto_one_numeric(source_p, &me, RPL_TOPIC, chptr->name, chptr->topic); |
1145 |
sendto_one_numeric(source_p, &me, RPL_TOPICWHOTIME, chptr->name, |
1146 |
chptr->topic_info, chptr->topic_time); |
1147 |
} |
1148 |
|
1149 |
channel_member_names(source_p, chptr, 1); |
1150 |
|
1151 |
source_p->connection->last_join_time = CurrentTime; |
1152 |
} |
1153 |
} |
1154 |
|
1155 |
/*! \brief Removes a client from a specific channel |
1156 |
* \param source_p Pointer to source client to remove |
1157 |
* \param name Name of channel to remove from |
1158 |
* \param reason Part reason to show |
1159 |
*/ |
1160 |
static void |
1161 |
channel_part_one_client(struct Client *source_p, const char *name, const char *reason) |
1162 |
{ |
1163 |
struct Channel *chptr = NULL; |
1164 |
struct Membership *member = NULL; |
1165 |
|
1166 |
if ((chptr = hash_find_channel(name)) == NULL) |
1167 |
{ |
1168 |
sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, name); |
1169 |
return; |
1170 |
} |
1171 |
|
1172 |
if ((member = find_channel_link(source_p, chptr)) == NULL) |
1173 |
{ |
1174 |
sendto_one_numeric(source_p, &me, ERR_NOTONCHANNEL, chptr->name); |
1175 |
return; |
1176 |
} |
1177 |
|
1178 |
if (MyConnect(source_p) && !HasUMode(source_p, UMODE_OPER)) |
1179 |
check_spambot_warning(source_p, NULL); |
1180 |
|
1181 |
/* |
1182 |
* Remove user from the old channel (if any) |
1183 |
* only allow /part reasons in -m chans |
1184 |
*/ |
1185 |
if (*reason && (!MyConnect(source_p) || |
1186 |
((can_send(chptr, source_p, member, reason) && |
1187 |
(source_p->connection->firsttime + ConfigGeneral.anti_spam_exit_message_time) |
1188 |
< CurrentTime)))) |
1189 |
{ |
1190 |
sendto_server(source_p, 0, 0, ":%s PART %s :%s", |
1191 |
source_p->id, chptr->name, reason); |
1192 |
sendto_channel_local(0, chptr, ":%s!%s@%s PART %s :%s", |
1193 |
source_p->name, source_p->username, |
1194 |
source_p->host, chptr->name, reason); |
1195 |
} |
1196 |
else |
1197 |
{ |
1198 |
sendto_server(source_p, 0, 0, ":%s PART %s", |
1199 |
source_p->id, chptr->name); |
1200 |
sendto_channel_local(0, chptr, ":%s!%s@%s PART %s", |
1201 |
source_p->name, source_p->username, |
1202 |
source_p->host, chptr->name); |
1203 |
} |
1204 |
|
1205 |
remove_user_from_channel(member); |
1206 |
} |
1207 |
|
1208 |
void |
1209 |
channel_do_part(struct Client *source_p, char *channel, const char *reason) |
1210 |
{ |
1211 |
char *p = NULL, *name = NULL; |
1212 |
char buf[KICKLEN + 1] = ""; |
1213 |
|
1214 |
assert(IsClient(source_p)); |
1215 |
|
1216 |
if (!EmptyString(reason)) |
1217 |
strlcpy(buf, reason, sizeof(buf)); |
1218 |
|
1219 |
for (name = strtoken(&p, channel, ","); name; |
1220 |
name = strtoken(&p, NULL, ",")) |
1221 |
channel_part_one_client(source_p, name, buf); |
1222 |
} |