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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 global_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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static mp_pool_t *member_pool, *channel_pool; |
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static char buf[IRCD_BUFSIZE]; |
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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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memset(ms, 0, sizeof(*ms)); |
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|
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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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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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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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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; /* nick + 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 top Pointer to top of mode link list 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 *top, char flag) |
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{ |
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const dlink_node *ptr = NULL; |
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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 (top->length == 0) |
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return; |
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|
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mlen = snprintf(buf, sizeof(buf), ":%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, top->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; |
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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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* or if the target is non-ts6 and we have too many modes in |
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* in this line. |
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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", buf, 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 ", banptr->name, banptr->user, |
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banptr->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", buf, 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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*/ |
258 |
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] = ""; |
263 |
|
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channel_modes(chptr, client_p, modebuf, parabuf); |
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send_members(client_p, chptr, modebuf, parabuf); |
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|
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send_mode_list(client_p, chptr, &chptr->banlist, 'b'); |
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send_mode_list(client_p, chptr, &chptr->exceptlist, 'e'); |
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send_mode_list(client_p, chptr, &chptr->invexlist, 'I'); |
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} |
271 |
|
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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 |
276 |
*/ |
277 |
int |
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check_channel_name(const char *name, const int local) |
279 |
{ |
280 |
const char *p = name; |
281 |
|
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assert(name != NULL); |
283 |
|
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if (!IsChanPrefix(*p)) |
285 |
return 0; |
286 |
|
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if (!local || !ConfigChannel.disable_fake_channels) |
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{ |
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while (*++p) |
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if (!IsChanChar(*p)) |
291 |
return 0; |
292 |
} |
293 |
else |
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{ |
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while (*++p) |
296 |
if (!IsVisibleChanChar(*p)) |
297 |
return 0; |
298 |
} |
299 |
|
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return p - name <= CHANNELLEN; |
301 |
} |
302 |
|
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void |
304 |
remove_ban(struct Ban *bptr, dlink_list *list) |
305 |
{ |
306 |
dlinkDelete(&bptr->node, list); |
307 |
|
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MyFree(bptr->name); |
309 |
MyFree(bptr->user); |
310 |
MyFree(bptr->host); |
311 |
MyFree(bptr->who); |
312 |
|
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mp_pool_release(bptr); |
314 |
} |
315 |
|
316 |
/* free_channel_list() |
317 |
* |
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* inputs - pointer to dlink_list |
319 |
* output - NONE |
320 |
* side effects - |
321 |
*/ |
322 |
void |
323 |
free_channel_list(dlink_list *list) |
324 |
{ |
325 |
dlink_node *ptr = NULL, *ptr_next = NULL; |
326 |
|
327 |
DLINK_FOREACH_SAFE(ptr, ptr_next, list->head) |
328 |
remove_ban(ptr->data, list); |
329 |
|
330 |
assert(list->tail == NULL && list->head == NULL); |
331 |
} |
332 |
|
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/*! \brief Get Channel block for chname (and allocate a new channel |
334 |
* block, if it didn't exist before) |
335 |
* \param chname Channel name |
336 |
* \return Channel block |
337 |
*/ |
338 |
struct Channel * |
339 |
make_channel(const char *chname) |
340 |
{ |
341 |
struct Channel *chptr = NULL; |
342 |
|
343 |
assert(!EmptyString(chname)); |
344 |
|
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chptr = mp_pool_get(channel_pool); |
346 |
|
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memset(chptr, 0, sizeof(*chptr)); |
348 |
|
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/* Doesn't hurt to set it here */ |
350 |
chptr->channelts = CurrentTime; |
351 |
chptr->last_join_time = CurrentTime; |
352 |
|
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strlcpy(chptr->chname, chname, sizeof(chptr->chname)); |
354 |
dlinkAdd(chptr, &chptr->node, &global_channel_list); |
355 |
|
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hash_add_channel(chptr); |
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|
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return chptr; |
359 |
} |
360 |
|
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/*! \brief Walk through this channel, and destroy it. |
362 |
* \param chptr Channel pointer |
363 |
*/ |
364 |
void |
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destroy_channel(struct Channel *chptr) |
366 |
{ |
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dlink_node *ptr = NULL, *ptr_next = NULL; |
368 |
|
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DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->invites.head) |
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del_invite(chptr, ptr->data); |
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 |
|
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dlinkDelete(&chptr->node, &global_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 * |
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channel_pub_or_secret(const struct Channel *chptr) |
389 |
{ |
390 |
if (SecretChannel(chptr)) |
391 |
return "@"; |
392 |
if (PrivateChannel(chptr)) |
393 |
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 *ptr = NULL; |
408 |
char lbuf[IRCD_BUFSIZE + 1] = ""; |
409 |
char *t = NULL, *start = NULL; |
410 |
int tlen = 0; |
411 |
int is_member = IsMember(source_p, chptr); |
412 |
int multi_prefix = HasCap(source_p, CAP_MULTI_PREFIX) != 0; |
413 |
int uhnames = HasCap(source_p, CAP_UHNAMES) != 0; |
414 |
|
415 |
if (PubChannel(chptr) || is_member) |
416 |
{ |
417 |
t = lbuf + snprintf(lbuf, sizeof(lbuf), numeric_form(RPL_NAMREPLY), |
418 |
me.name, source_p->name, |
419 |
channel_pub_or_secret(chptr), chptr->chname); |
420 |
start = t; |
421 |
|
422 |
DLINK_FOREACH(ptr, chptr->members.head) |
423 |
{ |
424 |
const struct Membership *ms = ptr->data; |
425 |
|
426 |
if (HasUMode(ms->client_p, UMODE_INVISIBLE) && !is_member) |
427 |
continue; |
428 |
|
429 |
if (!uhnames) |
430 |
tlen = strlen(ms->client_p->name) + 1; /* nick + space */ |
431 |
else |
432 |
tlen = strlen(ms->client_p->name) + strlen(ms->client_p->username) + |
433 |
strlen(ms->client_p->host) + 3; |
434 |
|
435 |
if (!multi_prefix) |
436 |
{ |
437 |
if (ms->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE)) |
438 |
++tlen; |
439 |
} |
440 |
else |
441 |
{ |
442 |
if (ms->flags & CHFL_CHANOP) |
443 |
++tlen; |
444 |
if (ms->flags & CHFL_HALFOP) |
445 |
++tlen; |
446 |
if (ms->flags & CHFL_VOICE) |
447 |
++tlen; |
448 |
} |
449 |
|
450 |
if (t + tlen - lbuf > IRCD_BUFSIZE - 2) |
451 |
{ |
452 |
*(t - 1) = '\0'; |
453 |
sendto_one(source_p, "%s", lbuf); |
454 |
t = start; |
455 |
} |
456 |
|
457 |
if (!uhnames) |
458 |
t += sprintf(t, "%s%s ", get_member_status(ms, multi_prefix), |
459 |
ms->client_p->name); |
460 |
else |
461 |
t += sprintf(t, "%s%s!%s@%s ", get_member_status(ms, multi_prefix), |
462 |
ms->client_p->name, ms->client_p->username, |
463 |
ms->client_p->host); |
464 |
} |
465 |
|
466 |
if (tlen) |
467 |
{ |
468 |
*(t - 1) = '\0'; |
469 |
sendto_one(source_p, "%s", lbuf); |
470 |
} |
471 |
} |
472 |
|
473 |
if (show_eon) |
474 |
sendto_one_numeric(source_p, &me, RPL_ENDOFNAMES, chptr->chname); |
475 |
} |
476 |
|
477 |
/*! \brief Adds client to invite list |
478 |
* \param chptr Pointer to channel block |
479 |
* \param who Pointer to client to add invite to |
480 |
*/ |
481 |
void |
482 |
add_invite(struct Channel *chptr, struct Client *who) |
483 |
{ |
484 |
del_invite(chptr, who); |
485 |
|
486 |
/* |
487 |
* Delete last link in chain if the list is max length |
488 |
*/ |
489 |
if (dlink_list_length(&who->localClient->invited) >= |
490 |
ConfigChannel.max_chans_per_user) |
491 |
del_invite(who->localClient->invited.tail->data, who); |
492 |
|
493 |
/* Add client to channel invite list */ |
494 |
dlinkAdd(who, make_dlink_node(), &chptr->invites); |
495 |
|
496 |
/* Add channel to the end of the client invite list */ |
497 |
dlinkAdd(chptr, make_dlink_node(), &who->localClient->invited); |
498 |
} |
499 |
|
500 |
/*! \brief Delete Invite block from channel invite list |
501 |
* and client invite list |
502 |
* \param chptr Pointer to Channel struct |
503 |
* \param who Pointer to client to remove invites from |
504 |
*/ |
505 |
void |
506 |
del_invite(struct Channel *chptr, struct Client *who) |
507 |
{ |
508 |
dlink_node *ptr = NULL; |
509 |
|
510 |
if ((ptr = dlinkFindDelete(&who->localClient->invited, chptr))) |
511 |
free_dlink_node(ptr); |
512 |
|
513 |
if ((ptr = dlinkFindDelete(&chptr->invites, who))) |
514 |
free_dlink_node(ptr); |
515 |
} |
516 |
|
517 |
/* get_member_status() |
518 |
* |
519 |
* inputs - pointer to struct Membership |
520 |
* - YES if we can combine different flags |
521 |
* output - string either @, +, % or "" depending on whether |
522 |
* chanop, voiced or user |
523 |
* side effects - |
524 |
* |
525 |
* NOTE: Returned string is usually a static buffer |
526 |
* (like in get_client_name) |
527 |
*/ |
528 |
const char * |
529 |
get_member_status(const struct Membership *ms, const int combine) |
530 |
{ |
531 |
static char buffer[4]; |
532 |
char *p = buffer; |
533 |
|
534 |
if (ms->flags & CHFL_CHANOP) |
535 |
{ |
536 |
if (!combine) |
537 |
return "@"; |
538 |
*p++ = '@'; |
539 |
} |
540 |
|
541 |
if (ms->flags & CHFL_HALFOP) |
542 |
{ |
543 |
if (!combine) |
544 |
return "%"; |
545 |
*p++ = '%'; |
546 |
} |
547 |
|
548 |
if (ms->flags & CHFL_VOICE) |
549 |
*p++ = '+'; |
550 |
*p = '\0'; |
551 |
|
552 |
return buffer; |
553 |
} |
554 |
|
555 |
/*! |
556 |
* \param who Pointer to Client to check |
557 |
* \param list Pointer to ban list to search |
558 |
* \return 1 if ban found for given n!u\@h mask, 0 otherwise |
559 |
* |
560 |
*/ |
561 |
static int |
562 |
find_bmask(const struct Client *who, const dlink_list *const list) |
563 |
{ |
564 |
const dlink_node *ptr = NULL; |
565 |
|
566 |
DLINK_FOREACH(ptr, list->head) |
567 |
{ |
568 |
const struct Ban *bp = ptr->data; |
569 |
|
570 |
if (!match(bp->name, who->name) && !match(bp->user, who->username)) |
571 |
{ |
572 |
switch (bp->type) |
573 |
{ |
574 |
case HM_HOST: |
575 |
if (!match(bp->host, who->host) || !match(bp->host, who->sockhost)) |
576 |
return 1; |
577 |
break; |
578 |
case HM_IPV4: |
579 |
if (who->localClient->aftype == AF_INET) |
580 |
if (match_ipv4(&who->localClient->ip, &bp->addr, bp->bits)) |
581 |
return 1; |
582 |
break; |
583 |
#ifdef IPV6 |
584 |
case HM_IPV6: |
585 |
if (who->localClient->aftype == AF_INET6) |
586 |
if (match_ipv6(&who->localClient->ip, &bp->addr, bp->bits)) |
587 |
return 1; |
588 |
break; |
589 |
#endif |
590 |
default: |
591 |
assert(0); |
592 |
} |
593 |
} |
594 |
} |
595 |
|
596 |
return 0; |
597 |
} |
598 |
|
599 |
/*! |
600 |
* \param chptr Pointer to channel block |
601 |
* \param who Pointer to client to check access fo |
602 |
* \return 0 if not banned, 1 otherwise |
603 |
*/ |
604 |
int |
605 |
is_banned(const struct Channel *chptr, const struct Client *who) |
606 |
{ |
607 |
if (find_bmask(who, &chptr->banlist)) |
608 |
if (!find_bmask(who, &chptr->exceptlist)) |
609 |
return 1; |
610 |
|
611 |
return 0; |
612 |
} |
613 |
|
614 |
/*! Tests if a client can join a certain channel |
615 |
* \param source_p Pointer to client attempting to join |
616 |
* \param chptr Pointer to channel |
617 |
* \param key Key sent by client attempting to join if present |
618 |
* \return ERR_BANNEDFROMCHAN, ERR_INVITEONLYCHAN, ERR_CHANNELISFULL |
619 |
* or 0 if allowed to join. |
620 |
*/ |
621 |
int |
622 |
can_join(struct Client *source_p, struct Channel *chptr, const char *key) |
623 |
{ |
624 |
if ((chptr->mode.mode & MODE_SSLONLY) && !HasUMode(source_p, UMODE_SSL)) |
625 |
return ERR_SSLONLYCHAN; |
626 |
|
627 |
if ((chptr->mode.mode & MODE_REGONLY) && !HasUMode(source_p, UMODE_REGISTERED)) |
628 |
return ERR_NEEDREGGEDNICK; |
629 |
|
630 |
if ((chptr->mode.mode & MODE_OPERONLY) && !HasUMode(source_p, UMODE_OPER)) |
631 |
return ERR_OPERONLYCHAN; |
632 |
|
633 |
if (chptr->mode.mode & MODE_INVITEONLY) |
634 |
if (!dlinkFind(&source_p->localClient->invited, chptr)) |
635 |
if (!find_bmask(source_p, &chptr->invexlist)) |
636 |
return ERR_INVITEONLYCHAN; |
637 |
|
638 |
if (chptr->mode.key[0] && (!key || strcmp(chptr->mode.key, key))) |
639 |
return ERR_BADCHANNELKEY; |
640 |
|
641 |
if (chptr->mode.limit && dlink_list_length(&chptr->members) >= |
642 |
chptr->mode.limit) |
643 |
return ERR_CHANNELISFULL; |
644 |
|
645 |
if (is_banned(chptr, source_p)) |
646 |
return ERR_BANNEDFROMCHAN; |
647 |
|
648 |
return 0; |
649 |
} |
650 |
|
651 |
int |
652 |
has_member_flags(const struct Membership *ms, const unsigned int flags) |
653 |
{ |
654 |
return ms && (ms->flags & flags); |
655 |
} |
656 |
|
657 |
struct Membership * |
658 |
find_channel_link(struct Client *client_p, struct Channel *chptr) |
659 |
{ |
660 |
dlink_node *ptr = NULL; |
661 |
|
662 |
if (!IsClient(client_p)) |
663 |
return NULL; |
664 |
|
665 |
if (dlink_list_length(&chptr->members) < dlink_list_length(&client_p->channel)) |
666 |
{ |
667 |
DLINK_FOREACH(ptr, chptr->members.head) |
668 |
if (((struct Membership *)ptr->data)->client_p == client_p) |
669 |
return ptr->data; |
670 |
} |
671 |
else |
672 |
{ |
673 |
DLINK_FOREACH(ptr, client_p->channel.head) |
674 |
if (((struct Membership *)ptr->data)->chptr == chptr) |
675 |
return ptr->data; |
676 |
} |
677 |
|
678 |
return NULL; |
679 |
} |
680 |
|
681 |
/*! Tests if a client can send to a channel |
682 |
* \param message The actual message string the client wants to send |
683 |
* \return 1 if the message does contain any control codes, 0 otherwise |
684 |
*/ |
685 |
static int |
686 |
msg_has_ctrls(const char *message) |
687 |
{ |
688 |
const unsigned char *p = (const unsigned char *)message; |
689 |
|
690 |
for (; *p; ++p) |
691 |
{ |
692 |
if (*p > 31 || *p == 1) |
693 |
continue; /* CTCP or no control code */ |
694 |
|
695 |
if (*p == 27) /* Escape */ |
696 |
{ |
697 |
/* ISO 2022 charset shift sequence */ |
698 |
if (*(p + 1) == '$' || |
699 |
*(p + 1) == '(') |
700 |
{ |
701 |
++p; |
702 |
continue; |
703 |
} |
704 |
} |
705 |
|
706 |
return 1; /* Control code */ |
707 |
} |
708 |
|
709 |
return 0; |
710 |
} |
711 |
|
712 |
/*! Tests if a client can send to a channel |
713 |
* \param chptr Pointer to Channel struct |
714 |
* \param source_p Pointer to Client struct |
715 |
* \param ms Pointer to Membership struct (can be NULL) |
716 |
* \param message The actual message string the client wants to send |
717 |
* \return CAN_SEND_OPV if op or voiced on channel\n |
718 |
* CAN_SEND_NONOP if can send to channel but is not an op\n |
719 |
* ERR_CANNOTSENDTOCHAN or ERR_NEEDREGGEDNICK if they cannot send to channel\n |
720 |
*/ |
721 |
int |
722 |
can_send(struct Channel *chptr, struct Client *source_p, |
723 |
struct Membership *ms, const char *message) |
724 |
{ |
725 |
struct MaskItem *conf = NULL; |
726 |
|
727 |
if (IsServer(source_p) || HasFlag(source_p, FLAGS_SERVICE)) |
728 |
return CAN_SEND_OPV; |
729 |
|
730 |
if (MyClient(source_p) && !IsExemptResv(source_p)) |
731 |
if (!(HasUMode(source_p, UMODE_OPER) && ConfigFileEntry.oper_pass_resv)) |
732 |
if ((conf = match_find_resv(chptr->chname)) && !resv_find_exempt(source_p, conf)) |
733 |
return ERR_CANNOTSENDTOCHAN; |
734 |
|
735 |
if ((chptr->mode.mode & MODE_NOCTRL) && msg_has_ctrls(message)) |
736 |
return ERR_NOCTRLSONCHAN; |
737 |
if (ms || (ms = find_channel_link(source_p, chptr))) |
738 |
if (ms->flags & (CHFL_CHANOP|CHFL_HALFOP|CHFL_VOICE)) |
739 |
return CAN_SEND_OPV; |
740 |
if (!ms && (chptr->mode.mode & MODE_NOPRIVMSGS)) |
741 |
return ERR_CANNOTSENDTOCHAN; |
742 |
if (chptr->mode.mode & MODE_MODERATED) |
743 |
return ERR_CANNOTSENDTOCHAN; |
744 |
if ((chptr->mode.mode & MODE_MODREG) && !HasUMode(source_p, UMODE_REGISTERED)) |
745 |
return ERR_NEEDREGGEDNICK; |
746 |
|
747 |
/* Cache can send if banned */ |
748 |
if (MyClient(source_p)) |
749 |
{ |
750 |
if (ms) |
751 |
{ |
752 |
if (ms->flags & CHFL_BAN_SILENCED) |
753 |
return ERR_CANNOTSENDTOCHAN; |
754 |
|
755 |
if (!(ms->flags & CHFL_BAN_CHECKED)) |
756 |
{ |
757 |
if (is_banned(chptr, source_p)) |
758 |
{ |
759 |
ms->flags |= (CHFL_BAN_CHECKED|CHFL_BAN_SILENCED); |
760 |
return ERR_CANNOTSENDTOCHAN; |
761 |
} |
762 |
|
763 |
ms->flags |= CHFL_BAN_CHECKED; |
764 |
} |
765 |
} |
766 |
else if (is_banned(chptr, source_p)) |
767 |
return ERR_CANNOTSENDTOCHAN; |
768 |
} |
769 |
|
770 |
return CAN_SEND_NONOP; |
771 |
} |
772 |
|
773 |
/*! \brief Updates the client's oper_warn_count_down, warns the |
774 |
* IRC operators if necessary, and updates |
775 |
* join_leave_countdown as needed. |
776 |
* \param source_p Pointer to struct Client to check |
777 |
* \param name Channel name or NULL if this is a part. |
778 |
*/ |
779 |
void |
780 |
check_spambot_warning(struct Client *source_p, const char *name) |
781 |
{ |
782 |
int t_delta = 0; |
783 |
int decrement_count = 0; |
784 |
|
785 |
if ((GlobalSetOptions.spam_num && |
786 |
(source_p->localClient->join_leave_count >= |
787 |
GlobalSetOptions.spam_num))) |
788 |
{ |
789 |
if (source_p->localClient->oper_warn_count_down > 0) |
790 |
source_p->localClient->oper_warn_count_down--; |
791 |
else |
792 |
source_p->localClient->oper_warn_count_down = 0; |
793 |
|
794 |
if (source_p->localClient->oper_warn_count_down == 0) |
795 |
{ |
796 |
/* It's already known as a possible spambot */ |
797 |
if (name) |
798 |
sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE, |
799 |
"User %s (%s@%s) trying to join %s is a possible spambot", |
800 |
source_p->name, source_p->username, |
801 |
source_p->host, name); |
802 |
else |
803 |
sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE, |
804 |
"User %s (%s@%s) is a possible spambot", |
805 |
source_p->name, source_p->username, |
806 |
source_p->host); |
807 |
source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN; |
808 |
} |
809 |
} |
810 |
else |
811 |
{ |
812 |
if ((t_delta = (CurrentTime - source_p->localClient->last_leave_time)) > |
813 |
JOIN_LEAVE_COUNT_EXPIRE_TIME) |
814 |
{ |
815 |
decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME); |
816 |
if (decrement_count > source_p->localClient->join_leave_count) |
817 |
source_p->localClient->join_leave_count = 0; |
818 |
else |
819 |
source_p->localClient->join_leave_count -= decrement_count; |
820 |
} |
821 |
else |
822 |
{ |
823 |
if ((CurrentTime - (source_p->localClient->last_join_time)) < |
824 |
GlobalSetOptions.spam_time) |
825 |
source_p->localClient->join_leave_count++; /* It's a possible spambot */ |
826 |
} |
827 |
|
828 |
if (name) |
829 |
source_p->localClient->last_join_time = CurrentTime; |
830 |
else |
831 |
source_p->localClient->last_leave_time = CurrentTime; |
832 |
} |
833 |
} |
834 |
|
835 |
/*! \brief Compares usercount and servercount against their split |
836 |
* values and adjusts splitmode accordingly |
837 |
* \param unused Unused address pointer |
838 |
*/ |
839 |
void |
840 |
check_splitmode(void *unused) |
841 |
{ |
842 |
if (splitchecking && (ConfigChannel.no_join_on_split || |
843 |
ConfigChannel.no_create_on_split)) |
844 |
{ |
845 |
const unsigned int server = dlink_list_length(&global_serv_list); |
846 |
|
847 |
if (!splitmode && ((server < split_servers) || (Count.total < split_users))) |
848 |
{ |
849 |
splitmode = 1; |
850 |
|
851 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
852 |
"Network split, activating splitmode"); |
853 |
eventAddIsh("check_splitmode", check_splitmode, NULL, 10); |
854 |
} |
855 |
else if (splitmode && (server > split_servers) && (Count.total > split_users)) |
856 |
{ |
857 |
splitmode = 0; |
858 |
|
859 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
860 |
"Network rejoined, deactivating splitmode"); |
861 |
eventDelete(check_splitmode, NULL); |
862 |
} |
863 |
} |
864 |
} |
865 |
|
866 |
/*! \brief Sets the channel topic for a certain channel |
867 |
* \param chptr Pointer to struct Channel |
868 |
* \param topic The topic string |
869 |
* \param topic_info n!u\@h formatted string of the topic setter |
870 |
* \param topicts Timestamp on the topic |
871 |
* \param local Whether the topic is set by a local client |
872 |
*/ |
873 |
void |
874 |
set_channel_topic(struct Channel *chptr, const char *topic, |
875 |
const char *topic_info, time_t topicts, int local) |
876 |
{ |
877 |
if (local) |
878 |
strlcpy(chptr->topic, topic, IRCD_MIN(sizeof(chptr->topic), ServerInfo.max_topic_length + 1)); |
879 |
else |
880 |
strlcpy(chptr->topic, topic, sizeof(chptr->topic)); |
881 |
|
882 |
strlcpy(chptr->topic_info, topic_info, sizeof(chptr->topic_info)); |
883 |
chptr->topic_time = topicts; |
884 |
} |