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/* |
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* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
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* |
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* Copyright (C) 2002 by the past and present ircd coders, and others. |
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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 "common.h" |
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#include "hash.h" |
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#include "hostmask.h" |
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#include "irc_string.h" |
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#include "sprintf_irc.h" |
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#include "ircd.h" |
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#include "numeric.h" |
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#include "s_serv.h" /* captab */ |
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#include "s_user.h" |
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#include "send.h" |
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#include "s_conf.h" /* ConfigFileEntry, ConfigChannel */ |
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#include "event.h" |
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#include "memory.h" |
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#include "balloc.h" |
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|
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struct config_channel_entry ConfigChannel; |
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dlink_list global_channel_list = { NULL, NULL, 0 }; |
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BlockHeap *ban_heap; /*! \todo ban_heap shouldn't be a global var */ |
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|
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static BlockHeap *member_heap = NULL; |
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static BlockHeap *channel_heap = NULL; |
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|
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static char buf[IRCD_BUFSIZE]; |
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static char modebuf[MODEBUFLEN]; |
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static char parabuf[MODEBUFLEN]; |
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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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init_channels(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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add_capability("CHW", CAP_CHW, 1); |
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|
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channel_heap = BlockHeapCreate("channel", sizeof(struct Channel), CHANNEL_HEAP_SIZE); |
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ban_heap = BlockHeapCreate("ban", sizeof(struct Ban), BAN_HEAP_SIZE); |
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member_heap = BlockHeapCreate("member", sizeof(struct Membership), CHANNEL_HEAP_SIZE*2); |
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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, |
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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 = BlockHeapAlloc(member_heap); |
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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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BlockHeapFree(member_heap, 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 *lmodebuf, char *lparabuf) |
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{ |
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struct Membership *ms; |
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dlink_node *ptr; |
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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 + ircsprintf(buf, ":%s SJOIN %lu %s %s %s:", |
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ID_or_name(&me, client_p), |
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(unsigned long)chptr->channelts, |
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chptr->chname, lmodebuf, lparabuf); |
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|
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DLINK_FOREACH(ptr, chptr->members.head) |
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{ |
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ms = ptr->data; |
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|
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tlen = strlen(IsCapable(client_p, CAP_TS6) ? |
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ID(ms->client_p) : ms->client_p->name) + 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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#ifdef HALFOPS |
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else if (ms->flags & CHFL_HALFOP) |
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tlen++; |
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#endif |
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if (ms->flags & CHFL_VOICE) |
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tlen++; |
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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 |
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* -adx */ |
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if (t + tlen - buf > sizeof(buf) - 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 | CHFL_HALFOP))) |
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*t++ = (!(ms->flags & CHFL_CHANOP) && IsCapable(client_p, CAP_HOPS)) ? |
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'%' : '@'; |
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if ((ms->flags & CHFL_VOICE)) |
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*t++ = '+'; |
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|
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if (IsCapable(client_p, CAP_TS6)) |
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strcpy(t, ID(ms->client_p)); |
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else |
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strcpy(t, ms->client_p->name); |
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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 != NULL) |
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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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dlink_list *top, char flag) |
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{ |
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int ts5 = !IsCapable(client_p, CAP_TS6); |
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dlink_node *lp; |
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struct Ban *banptr; |
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char pbuf[IRCD_BUFSIZE]; |
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int tlen, mlen, cur_len, count = 0; |
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char *mp = NULL, *pp = pbuf; |
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|
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if (top == NULL || top->length == 0) |
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return; |
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|
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if (ts5) |
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mlen = ircsprintf(buf, ":%s MODE %s +", me.name, chptr->chname); |
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else |
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mlen = ircsprintf(buf, ":%s BMASK %lu %s %c :", me.id, |
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(unsigned long)chptr->channelts, chptr->chname, flag); |
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|
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/* MODE needs additional one byte for space between buf and pbuf */ |
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cur_len = mlen + ts5; |
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mp = buf + mlen; |
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|
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DLINK_FOREACH(lp, top->head) |
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{ |
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banptr = lp->data; |
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|
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/* must add another b/e/I letter if we use MODE */ |
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tlen = banptr->len + 3 + ts5; |
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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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(!IsCapable(client_p, CAP_TS6) && |
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(count >= MAXMODEPARAMS || pp - pbuf >= MODEBUFLEN))) |
257 |
{ |
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*(pp - 1) = '\0'; /* get rid of trailing space on buffer */ |
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sendto_one(client_p, "%s%s%s", buf, ts5 ? " " : "", pbuf); |
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|
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cur_len = mlen + ts5; |
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mp = buf + mlen; |
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pp = pbuf; |
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count = 0; |
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} |
266 |
|
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count++; |
268 |
if (ts5) |
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{ |
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*mp++ = flag; |
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*mp = '\0'; |
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} |
273 |
|
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pp += ircsprintf(pp, "%s!%s@%s ", banptr->name, banptr->username, |
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banptr->host); |
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cur_len += tlen; |
277 |
} |
278 |
|
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*(pp - 1) = '\0'; /* get rid of trailing space on buffer */ |
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sendto_one(client_p, "%s%s%s", buf, ts5 ? " " : "", pbuf); |
281 |
} |
282 |
|
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/*! \brief send "client_p" a full list of the modes for channel chptr |
284 |
* \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) |
289 |
{ |
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if (chptr->chname[0] != '#') |
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return; |
292 |
|
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*modebuf = *parabuf = '\0'; |
294 |
channel_modes(chptr, client_p, modebuf, parabuf); |
295 |
send_members(client_p, chptr, modebuf, parabuf); |
296 |
|
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send_mode_list(client_p, chptr, &chptr->banlist, 'b'); |
298 |
|
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if (IsCapable(client_p, CAP_EX)) |
300 |
send_mode_list(client_p, chptr, &chptr->exceptlist, 'e'); |
301 |
if (IsCapable(client_p, CAP_IE)) |
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send_mode_list(client_p, chptr, &chptr->invexlist, 'I'); |
303 |
} |
304 |
|
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/*! \brief check channel name for invalid characters |
306 |
* \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 |
309 |
*/ |
310 |
int |
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check_channel_name(const char *name, int local) |
312 |
{ |
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const char *p = name; |
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int max_length = local ? LOCAL_CHANNELLEN : CHANNELLEN; |
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assert(name != NULL); |
316 |
|
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if (!IsChanPrefix(*p)) |
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return 0; |
319 |
|
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if (!local || !ConfigChannel.disable_fake_channels) |
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{ |
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while (*++p) |
323 |
if (!IsChanChar(*p)) |
324 |
return 0; |
325 |
} |
326 |
else |
327 |
{ |
328 |
while (*++p) |
329 |
if (!IsVisibleChanChar(*p)) |
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return 0; |
331 |
} |
332 |
|
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return p - name <= max_length; |
334 |
} |
335 |
|
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void |
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remove_ban(struct Ban *bptr, dlink_list *list) |
338 |
{ |
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dlinkDelete(&bptr->node, list); |
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|
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MyFree(bptr->name); |
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MyFree(bptr->username); |
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MyFree(bptr->host); |
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MyFree(bptr->who); |
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|
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BlockHeapFree(ban_heap, bptr); |
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} |
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|
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/* free_channel_list() |
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* |
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* inputs - pointer to dlink_list |
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* output - NONE |
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* side effects - |
354 |
*/ |
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void |
356 |
free_channel_list(dlink_list *list) |
357 |
{ |
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dlink_node *ptr = NULL, *next_ptr = NULL; |
359 |
|
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DLINK_FOREACH_SAFE(ptr, next_ptr, list->head) |
361 |
remove_ban(ptr->data, list); |
362 |
|
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assert(list->tail == NULL && list->head == NULL); |
364 |
} |
365 |
|
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/*! \brief Get Channel block for chname (and allocate a new channel |
367 |
* block, if it didn't exist before) |
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* \param chname channel name |
369 |
* \return channel block |
370 |
*/ |
371 |
struct Channel * |
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make_channel(const char *chname) |
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{ |
374 |
struct Channel *chptr = NULL; |
375 |
|
376 |
assert(!EmptyString(chname)); |
377 |
|
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chptr = BlockHeapAlloc(channel_heap); |
379 |
|
380 |
/* doesn't hurt to set it here */ |
381 |
chptr->channelts = CurrentTime; |
382 |
chptr->last_join_time = CurrentTime; |
383 |
|
384 |
strlcpy(chptr->chname, chname, sizeof(chptr->chname)); |
385 |
dlinkAdd(chptr, &chptr->node, &global_channel_list); |
386 |
|
387 |
hash_add_channel(chptr); |
388 |
|
389 |
return chptr; |
390 |
} |
391 |
|
392 |
/*! \brief walk through this channel, and destroy it. |
393 |
* \param chptr channel pointer |
394 |
*/ |
395 |
void |
396 |
destroy_channel(struct Channel *chptr) |
397 |
{ |
398 |
dlink_node *ptr = NULL, *ptr_next = NULL; |
399 |
|
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DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->invites.head) |
401 |
del_invite(chptr, ptr->data); |
402 |
|
403 |
/* free ban/exception/invex lists */ |
404 |
free_channel_list(&chptr->banlist); |
405 |
free_channel_list(&chptr->exceptlist); |
406 |
free_channel_list(&chptr->invexlist); |
407 |
|
408 |
dlinkDelete(&chptr->node, &global_channel_list); |
409 |
hash_del_channel(chptr); |
410 |
|
411 |
BlockHeapFree(channel_heap, chptr); |
412 |
} |
413 |
|
414 |
/*! |
415 |
* \param chptr pointer to channel |
416 |
* \return string pointer "=" if public, "@" if secret else "*" |
417 |
*/ |
418 |
static const char * |
419 |
channel_pub_or_secret(const struct Channel *chptr) |
420 |
{ |
421 |
if (SecretChannel(chptr)) |
422 |
return "@"; |
423 |
if (PrivateChannel(chptr)) |
424 |
return "*"; |
425 |
return "="; |
426 |
} |
427 |
|
428 |
/*! \brief lists all names on given channel |
429 |
* \param source_p pointer to client struct requesting names |
430 |
* \param chptr pointer to channel block |
431 |
* \param show_eon show ENDOFNAMES numeric or not |
432 |
* (don't want it with /names with no params) |
433 |
*/ |
434 |
void |
435 |
channel_member_names(struct Client *source_p, struct Channel *chptr, |
436 |
int show_eon) |
437 |
{ |
438 |
struct Client *target_p = NULL; |
439 |
struct Membership *ms = NULL; |
440 |
dlink_node *ptr = NULL; |
441 |
char lbuf[IRCD_BUFSIZE + 1]; |
442 |
char *t = NULL, *start = NULL; |
443 |
int tlen = 0; |
444 |
int is_member = IsMember(source_p, chptr); |
445 |
int multi_prefix = HasCap(source_p, CAP_MULTI_PREFIX) != 0; |
446 |
|
447 |
if (PubChannel(chptr) || is_member) |
448 |
{ |
449 |
t = lbuf + ircsprintf(lbuf, form_str(RPL_NAMREPLY), |
450 |
me.name, source_p->name, |
451 |
channel_pub_or_secret(chptr), |
452 |
chptr->chname); |
453 |
start = t; |
454 |
|
455 |
DLINK_FOREACH(ptr, chptr->members.head) |
456 |
{ |
457 |
ms = ptr->data; |
458 |
target_p = ms->client_p; |
459 |
|
460 |
if (HasUMode(target_p, UMODE_INVISIBLE) && !is_member) |
461 |
continue; |
462 |
|
463 |
tlen = strlen(target_p->name) + 1; /* nick + space */ |
464 |
|
465 |
if (!multi_prefix) |
466 |
{ |
467 |
if (ms->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE)) |
468 |
++tlen; |
469 |
} |
470 |
else |
471 |
{ |
472 |
if (ms->flags & CHFL_CHANOP) |
473 |
++tlen; |
474 |
if (ms->flags & CHFL_HALFOP) |
475 |
++tlen; |
476 |
if (ms->flags & CHFL_VOICE) |
477 |
++tlen; |
478 |
} |
479 |
|
480 |
if (t + tlen - lbuf > IRCD_BUFSIZE - 2) |
481 |
{ |
482 |
*(t - 1) = '\0'; |
483 |
sendto_one(source_p, "%s", lbuf); |
484 |
t = start; |
485 |
} |
486 |
|
487 |
t += ircsprintf(t, "%s%s ", get_member_status(ms, multi_prefix), |
488 |
target_p->name); |
489 |
} |
490 |
|
491 |
if (tlen != 0) |
492 |
{ |
493 |
*(t - 1) = '\0'; |
494 |
sendto_one(source_p, "%s", lbuf); |
495 |
} |
496 |
} |
497 |
|
498 |
if (show_eon) |
499 |
sendto_one(source_p, form_str(RPL_ENDOFNAMES), |
500 |
me.name, source_p->name, chptr->chname); |
501 |
} |
502 |
|
503 |
/*! \brief adds client to invite list |
504 |
* \param chptr pointer to channel block |
505 |
* \param who pointer to client to add invite to |
506 |
*/ |
507 |
void |
508 |
add_invite(struct Channel *chptr, struct Client *who) |
509 |
{ |
510 |
del_invite(chptr, who); |
511 |
|
512 |
/* |
513 |
* delete last link in chain if the list is max length |
514 |
*/ |
515 |
if (dlink_list_length(&who->localClient->invited) >= |
516 |
ConfigChannel.max_chans_per_user) |
517 |
del_invite(who->localClient->invited.tail->data, who); |
518 |
|
519 |
/* add client to channel invite list */ |
520 |
dlinkAdd(who, make_dlink_node(), &chptr->invites); |
521 |
|
522 |
/* add channel to the end of the client invite list */ |
523 |
dlinkAdd(chptr, make_dlink_node(), &who->localClient->invited); |
524 |
} |
525 |
|
526 |
/*! \brief Delete Invite block from channel invite list |
527 |
* and client invite list |
528 |
* \param chptr pointer to Channel struct |
529 |
* \param who pointer to client to remove invites from |
530 |
*/ |
531 |
void |
532 |
del_invite(struct Channel *chptr, struct Client *who) |
533 |
{ |
534 |
dlink_node *ptr = NULL; |
535 |
|
536 |
if ((ptr = dlinkFindDelete(&who->localClient->invited, chptr))) |
537 |
free_dlink_node(ptr); |
538 |
|
539 |
if ((ptr = dlinkFindDelete(&chptr->invites, who))) |
540 |
free_dlink_node(ptr); |
541 |
} |
542 |
|
543 |
/* get_member_status() |
544 |
* |
545 |
* inputs - pointer to struct Membership |
546 |
* - YES if we can combine different flags |
547 |
* output - string either @, +, % or "" depending on whether |
548 |
* chanop, voiced or user |
549 |
* side effects - |
550 |
* |
551 |
* NOTE: Returned string is usually a static buffer |
552 |
* (like in get_client_name) |
553 |
*/ |
554 |
const char * |
555 |
get_member_status(const struct Membership *ms, int combine) |
556 |
{ |
557 |
static char buffer[4]; |
558 |
char *p = NULL; |
559 |
|
560 |
if (ms == NULL) |
561 |
return ""; |
562 |
p = buffer; |
563 |
|
564 |
if (ms->flags & CHFL_CHANOP) |
565 |
{ |
566 |
if (!combine) |
567 |
return "@"; |
568 |
*p++ = '@'; |
569 |
} |
570 |
|
571 |
#ifdef HALFOPS |
572 |
if (ms->flags & CHFL_HALFOP) |
573 |
{ |
574 |
if (!combine) |
575 |
return "%"; |
576 |
*p++ = '%'; |
577 |
} |
578 |
#endif |
579 |
|
580 |
if (ms->flags & CHFL_VOICE) |
581 |
*p++ = '+'; |
582 |
*p = '\0'; |
583 |
|
584 |
return buffer; |
585 |
} |
586 |
|
587 |
/*! |
588 |
* \param who pointer to Client to check |
589 |
* \param list pointer to ban list to search |
590 |
* \return 1 if ban found for given n!u\@h mask, 0 otherwise |
591 |
* |
592 |
*/ |
593 |
static int |
594 |
find_bmask(const struct Client *who, const dlink_list *const list) |
595 |
{ |
596 |
const dlink_node *ptr = NULL; |
597 |
|
598 |
DLINK_FOREACH(ptr, list->head) |
599 |
{ |
600 |
struct Ban *bp = ptr->data; |
601 |
|
602 |
if (match(bp->name, who->name) && match(bp->username, who->username)) |
603 |
{ |
604 |
switch (bp->type) |
605 |
{ |
606 |
case HM_HOST: |
607 |
if (match(bp->host, who->host) || match(bp->host, who->sockhost)) |
608 |
return 1; |
609 |
break; |
610 |
case HM_IPV4: |
611 |
if (who->localClient->aftype == AF_INET) |
612 |
if (match_ipv4(&who->localClient->ip, &bp->addr, bp->bits)) |
613 |
return 1; |
614 |
break; |
615 |
#ifdef IPV6 |
616 |
case HM_IPV6: |
617 |
if (who->localClient->aftype == AF_INET6) |
618 |
if (match_ipv6(&who->localClient->ip, &bp->addr, bp->bits)) |
619 |
return 1; |
620 |
break; |
621 |
#endif |
622 |
default: |
623 |
assert(0); |
624 |
} |
625 |
} |
626 |
} |
627 |
|
628 |
return 0; |
629 |
} |
630 |
|
631 |
/*! |
632 |
* \param chptr pointer to channel block |
633 |
* \param who pointer to client to check access fo |
634 |
* \return 0 if not banned, 1 otherwise |
635 |
*/ |
636 |
int |
637 |
is_banned(const struct Channel *chptr, const struct Client *who) |
638 |
{ |
639 |
if (find_bmask(who, &chptr->banlist)) |
640 |
if (!ConfigChannel.use_except || !find_bmask(who, &chptr->exceptlist)) |
641 |
return 1; |
642 |
|
643 |
return 0; |
644 |
} |
645 |
|
646 |
/*! |
647 |
* \param source_p pointer to client attempting to join |
648 |
* \param chptr pointer to channel |
649 |
* \param key key sent by client attempting to join if present |
650 |
* \return ERR_BANNEDFROMCHAN, ERR_INVITEONLYCHAN, ERR_CHANNELISFULL |
651 |
* or 0 if allowed to join. |
652 |
*/ |
653 |
int |
654 |
can_join(struct Client *source_p, struct Channel *chptr, const char *key) |
655 |
{ |
656 |
if (is_banned(chptr, source_p)) |
657 |
return ERR_BANNEDFROMCHAN; |
658 |
|
659 |
#ifdef HAVE_LIBCRYPTO |
660 |
if ((chptr->mode.mode & MODE_SSLONLY) && !source_p->localClient->fd.ssl) |
661 |
return ERR_SSLONLYCHAN; |
662 |
#endif |
663 |
|
664 |
if ((chptr->mode.mode & MODE_REGONLY) && !HasUMode(source_p, UMODE_REGISTERED)) |
665 |
return ERR_NEEDREGGEDNICK; |
666 |
|
667 |
if ((chptr->mode.mode & MODE_OPERONLY) && !HasUMode(source_p, UMODE_OPER)) |
668 |
return ERR_OPERONLYCHAN; |
669 |
|
670 |
if (chptr->mode.mode & MODE_INVITEONLY) |
671 |
if (!dlinkFind(&source_p->localClient->invited, chptr)) |
672 |
if (!ConfigChannel.use_invex || !find_bmask(source_p, &chptr->invexlist)) |
673 |
return ERR_INVITEONLYCHAN; |
674 |
|
675 |
if (chptr->mode.key[0] && (!key || irccmp(chptr->mode.key, key))) |
676 |
return ERR_BADCHANNELKEY; |
677 |
|
678 |
if (chptr->mode.limit && dlink_list_length(&chptr->members) >= |
679 |
chptr->mode.limit) |
680 |
return ERR_CHANNELISFULL; |
681 |
|
682 |
return 0; |
683 |
} |
684 |
|
685 |
int |
686 |
has_member_flags(struct Membership *ms, unsigned int flags) |
687 |
{ |
688 |
if (ms != NULL) |
689 |
return ms->flags & flags; |
690 |
return 0; |
691 |
} |
692 |
|
693 |
struct Membership * |
694 |
find_channel_link(struct Client *client_p, struct Channel *chptr) |
695 |
{ |
696 |
dlink_node *ptr = NULL; |
697 |
|
698 |
if (!IsClient(client_p)) |
699 |
return NULL; |
700 |
|
701 |
DLINK_FOREACH(ptr, client_p->channel.head) |
702 |
if (((struct Membership *)ptr->data)->chptr == chptr) |
703 |
return ptr->data; |
704 |
|
705 |
return NULL; |
706 |
} |
707 |
|
708 |
/*! |
709 |
* \param chptr pointer to Channel struct |
710 |
* \param source_p pointer to Client struct |
711 |
* \param ms pointer to Membership struct (can be NULL) |
712 |
* \return CAN_SEND_OPV if op or voiced on channel\n |
713 |
* CAN_SEND_NONOP if can send to channel but is not an op\n |
714 |
* ERR_CANNOTSENDTOCHAN or ERR_NEEDREGGEDNICK if they cannot send to channel\n |
715 |
*/ |
716 |
int |
717 |
can_send(struct Channel *chptr, struct Client *source_p, struct Membership *ms) |
718 |
{ |
719 |
if (IsServer(source_p) || HasFlag(source_p, FLAGS_SERVICE)) |
720 |
return CAN_SEND_OPV; |
721 |
|
722 |
if (MyClient(source_p) && !IsExemptResv(source_p)) |
723 |
if (!(HasUMode(source_p, UMODE_OPER) && ConfigFileEntry.oper_pass_resv)) |
724 |
if (!hash_find_resv(chptr->chname) == ConfigChannel.restrict_channels) |
725 |
return ERR_CANNOTSENDTOCHAN; |
726 |
|
727 |
if (ms != NULL || (ms = find_channel_link(source_p, chptr))) |
728 |
{ |
729 |
if (ms->flags & (CHFL_CHANOP|CHFL_HALFOP|CHFL_VOICE)) |
730 |
return CAN_SEND_OPV; |
731 |
|
732 |
/* cache can send if quiet_on_ban and banned */ |
733 |
if (ConfigChannel.quiet_on_ban && MyClient(source_p)) |
734 |
{ |
735 |
if (ms->flags & CHFL_BAN_SILENCED) |
736 |
return ERR_CANNOTSENDTOCHAN; |
737 |
|
738 |
if (!(ms->flags & CHFL_BAN_CHECKED)) |
739 |
{ |
740 |
if (is_banned(chptr, source_p)) |
741 |
{ |
742 |
ms->flags |= (CHFL_BAN_CHECKED|CHFL_BAN_SILENCED); |
743 |
return ERR_CANNOTSENDTOCHAN; |
744 |
} |
745 |
|
746 |
ms->flags |= CHFL_BAN_CHECKED; |
747 |
} |
748 |
} |
749 |
} |
750 |
else if (chptr->mode.mode & MODE_NOPRIVMSGS) |
751 |
return ERR_CANNOTSENDTOCHAN; |
752 |
|
753 |
if (chptr->mode.mode & MODE_MODERATED) |
754 |
return ERR_CANNOTSENDTOCHAN; |
755 |
|
756 |
return CAN_SEND_NONOP; |
757 |
} |
758 |
|
759 |
/*! \brief Updates the client's oper_warn_count_down, warns the |
760 |
* IRC operators if necessary, and updates |
761 |
* join_leave_countdown as needed. |
762 |
* \param source_p pointer to struct Client to check |
763 |
* \param name channel name or NULL if this is a part. |
764 |
*/ |
765 |
void |
766 |
check_spambot_warning(struct Client *source_p, const char *name) |
767 |
{ |
768 |
int t_delta = 0; |
769 |
int decrement_count = 0; |
770 |
|
771 |
if ((GlobalSetOptions.spam_num && |
772 |
(source_p->localClient->join_leave_count >= |
773 |
GlobalSetOptions.spam_num))) |
774 |
{ |
775 |
if (source_p->localClient->oper_warn_count_down > 0) |
776 |
source_p->localClient->oper_warn_count_down--; |
777 |
else |
778 |
source_p->localClient->oper_warn_count_down = 0; |
779 |
|
780 |
if (source_p->localClient->oper_warn_count_down == 0) |
781 |
{ |
782 |
/* Its already known as a possible spambot */ |
783 |
if (name != NULL) |
784 |
sendto_realops_flags(UMODE_BOTS, L_ALL, |
785 |
"User %s (%s@%s) trying to join %s is a possible spambot", |
786 |
source_p->name, source_p->username, |
787 |
source_p->host, name); |
788 |
else |
789 |
sendto_realops_flags(UMODE_BOTS, L_ALL, |
790 |
"User %s (%s@%s) is a possible spambot", |
791 |
source_p->name, source_p->username, |
792 |
source_p->host); |
793 |
source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN; |
794 |
} |
795 |
} |
796 |
else |
797 |
{ |
798 |
if ((t_delta = (CurrentTime - source_p->localClient->last_leave_time)) > |
799 |
JOIN_LEAVE_COUNT_EXPIRE_TIME) |
800 |
{ |
801 |
decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME); |
802 |
if (decrement_count > source_p->localClient->join_leave_count) |
803 |
source_p->localClient->join_leave_count = 0; |
804 |
else |
805 |
source_p->localClient->join_leave_count -= decrement_count; |
806 |
} |
807 |
else |
808 |
{ |
809 |
if ((CurrentTime - (source_p->localClient->last_join_time)) < |
810 |
GlobalSetOptions.spam_time) |
811 |
{ |
812 |
/* oh, its a possible spambot */ |
813 |
source_p->localClient->join_leave_count++; |
814 |
} |
815 |
} |
816 |
|
817 |
if (name != NULL) |
818 |
source_p->localClient->last_join_time = CurrentTime; |
819 |
else |
820 |
source_p->localClient->last_leave_time = CurrentTime; |
821 |
} |
822 |
} |
823 |
|
824 |
/*! \brief compares usercount and servercount against their split |
825 |
* values and adjusts splitmode accordingly |
826 |
* \param unused Unused address pointer |
827 |
*/ |
828 |
void |
829 |
check_splitmode(void *unused) |
830 |
{ |
831 |
if (splitchecking && (ConfigChannel.no_join_on_split || |
832 |
ConfigChannel.no_create_on_split)) |
833 |
{ |
834 |
const unsigned int server = dlink_list_length(&global_serv_list); |
835 |
|
836 |
if (!splitmode && ((server < split_servers) || (Count.total < split_users))) |
837 |
{ |
838 |
splitmode = 1; |
839 |
|
840 |
sendto_realops_flags(UMODE_ALL,L_ALL, |
841 |
"Network split, activating splitmode"); |
842 |
eventAddIsh("check_splitmode", check_splitmode, NULL, 10); |
843 |
} |
844 |
else if (splitmode && (server > split_servers) && (Count.total > split_users)) |
845 |
{ |
846 |
splitmode = 0; |
847 |
|
848 |
sendto_realops_flags(UMODE_ALL, L_ALL, |
849 |
"Network rejoined, deactivating splitmode"); |
850 |
eventDelete(check_splitmode, NULL); |
851 |
} |
852 |
} |
853 |
} |
854 |
|
855 |
/*! \brief Sets the channel topic for chptr |
856 |
* \param chptr Pointer to struct Channel |
857 |
* \param topic The topic string |
858 |
* \param topic_info n!u\@h formatted string of the topic setter |
859 |
* \param topicts timestamp on the topic |
860 |
*/ |
861 |
void |
862 |
set_channel_topic(struct Channel *chptr, const char *topic, |
863 |
const char *topic_info, time_t topicts) |
864 |
{ |
865 |
strlcpy(chptr->topic, topic, sizeof(chptr->topic)); |
866 |
strlcpy(chptr->topic_info, topic_info, sizeof(chptr->topic_info)); |
867 |
chptr->topic_time = topicts; |
868 |
} |