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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) 1997-2018 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 "conf_resv.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 "misc.h" |
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|
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|
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/** Doubly linked list containing a list of all channels. */ |
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static dlink_list channel_list; |
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|
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|
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/*! \brief Returns the channel_list as constant |
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* \return channel_list |
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*/ |
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const dlink_list * |
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channel_get_list(void) |
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{ |
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return &channel_list; |
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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 client_p 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 *client_p, |
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unsigned int flags, int flood_ctrl) |
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{ |
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assert(IsClient(client_p)); |
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|
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if (GlobalSetOptions.joinfloodtime) |
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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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client_get_name(client_p, HIDE_IP), |
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client_p->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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struct Membership *member = xcalloc(sizeof(*member)); |
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member->client_p = client_p; |
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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(client_p)) |
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dlinkAdd(member, &member->locchannode, &chptr->members_local); |
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|
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dlinkAdd(member, &member->usernode, &client_p->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->members_local); |
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|
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dlinkDelete(&member->usernode, &client_p->channel); |
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|
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xfree(member); |
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|
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if (chptr->members.head == NULL) |
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channel_free(chptr); |
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} |
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|
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/* channel_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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channel_send_members(struct Client *client_p, const struct Channel *chptr, |
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const char *modebuf, const char *parabuf) |
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{ |
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dlink_node *node; |
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char buf[IRCD_BUFSIZE] = ""; |
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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 %ju %s %s %s:", |
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me.id, 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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channel_send_mask_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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dlink_node *node; |
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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 (dlink_list_length(list) == 0) |
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return; |
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|
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mlen = snprintf(mbuf, sizeof(mbuf), ":%s BMASK %ju %s %c :", me.id, |
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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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channel_send_modes(struct Client *client_p, const 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); |
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channel_send_members(client_p, chptr, modebuf, parabuf); |
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|
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channel_send_mask_list(client_p, chptr, &chptr->banlist, 'b'); |
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channel_send_mask_list(client_p, chptr, &chptr->exceptlist, 'e'); |
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channel_send_mask_list(client_p, chptr, &chptr->invexlist, 'I'); |
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} |
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|
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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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*/ |
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int |
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channel_check_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)); |
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|
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if (!IsChanPrefix(*p)) |
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return 0; |
283 |
|
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if (!local || !ConfigChannel.disable_fake_channels) |
285 |
{ |
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while (*++p) |
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if (!IsChanChar(*p)) |
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return 0; |
289 |
} |
290 |
else |
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{ |
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while (*++p) |
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if (!IsVisibleChanChar(*p)) |
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return 0; |
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} |
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|
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return p - name <= CHANNELLEN; |
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} |
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|
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void |
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remove_ban(struct Ban *ban, dlink_list *list) |
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{ |
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dlinkDelete(&ban->node, list); |
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xfree(ban); |
305 |
} |
306 |
|
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/* channel_free_mask_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 - |
312 |
*/ |
313 |
static void |
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channel_free_mask_list(dlink_list *list) |
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{ |
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while (list->head) |
317 |
{ |
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struct Ban *ban = list->head->data; |
319 |
remove_ban(ban, list); |
320 |
} |
321 |
} |
322 |
|
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/*! \brief Get Channel block for name (and allocate a new channel |
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* block, if it didn't exist before) |
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* \param name Channel name |
326 |
* \return Channel block |
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*/ |
328 |
struct Channel * |
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channel_make(const char *name) |
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{ |
331 |
assert(!EmptyString(name)); |
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|
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struct Channel *chptr = xcalloc(sizeof(*chptr)); |
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chptr->hnextch = chptr; |
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/* Doesn't hurt to set it here */ |
336 |
chptr->creationtime = CurrentTime; |
337 |
chptr->last_join_time = CurrentTime; |
338 |
|
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/* Cache channel name length to avoid repetitive strlen() calls. */ |
340 |
chptr->name_len = strlcpy(chptr->name, name, sizeof(chptr->name)); |
341 |
if (chptr->name_len >= sizeof(chptr->name)) |
342 |
chptr->name_len = sizeof(chptr->name) - 1; |
343 |
|
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dlinkAdd(chptr, &chptr->node, &channel_list); |
345 |
hash_add_channel(chptr); |
346 |
|
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return chptr; |
348 |
} |
349 |
|
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/*! \brief Walk through this channel, and destroy it. |
351 |
* \param chptr Channel pointer |
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*/ |
353 |
void |
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channel_free(struct Channel *chptr) |
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{ |
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clear_invite_list(&chptr->invites); |
357 |
|
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/* Free ban/exception/invex lists */ |
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channel_free_mask_list(&chptr->banlist); |
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channel_free_mask_list(&chptr->exceptlist); |
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channel_free_mask_list(&chptr->invexlist); |
362 |
|
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dlinkDelete(&chptr->node, &channel_list); |
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hash_del_channel(chptr); |
365 |
|
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assert(chptr->hnextch == chptr); |
367 |
|
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assert(chptr->node.prev == NULL); |
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assert(chptr->node.next == NULL); |
370 |
|
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assert(dlink_list_length(&chptr->members_local) == 0); |
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assert(chptr->members_local.head == NULL); |
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assert(chptr->members_local.tail == NULL); |
374 |
|
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assert(dlink_list_length(&chptr->members) == 0); |
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assert(chptr->members.head == NULL); |
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assert(chptr->members.tail == NULL); |
378 |
|
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assert(dlink_list_length(&chptr->invites) == 0); |
380 |
assert(chptr->invites.head == NULL); |
381 |
assert(chptr->invites.tail == NULL); |
382 |
|
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assert(dlink_list_length(&chptr->banlist) == 0); |
384 |
assert(chptr->banlist.head == NULL); |
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assert(chptr->banlist.tail == NULL); |
386 |
|
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assert(dlink_list_length(&chptr->exceptlist) == 0); |
388 |
assert(chptr->exceptlist.head == NULL); |
389 |
assert(chptr->exceptlist.tail == NULL); |
390 |
|
391 |
assert(dlink_list_length(&chptr->invexlist) == 0); |
392 |
assert(chptr->invexlist.head == NULL); |
393 |
assert(chptr->invexlist.tail == NULL); |
394 |
|
395 |
xfree(chptr); |
396 |
} |
397 |
|
398 |
/*! |
399 |
* \param chptr Pointer to channel |
400 |
* \return String pointer "=" if public, "@" if secret else "*" |
401 |
*/ |
402 |
static const char * |
403 |
channel_pub_or_secret(const struct Channel *chptr) |
404 |
{ |
405 |
if (SecretChannel(chptr)) |
406 |
return "@"; |
407 |
if (PrivateChannel(chptr)) |
408 |
return "*"; |
409 |
return "="; |
410 |
} |
411 |
|
412 |
/*! \brief lists all names on given channel |
413 |
* \param client_p Pointer to client struct requesting names |
414 |
* \param chptr Pointer to channel block |
415 |
* \param show_eon Show RPL_ENDOFNAMES numeric or not |
416 |
* (don't want it with /names with no params) |
417 |
*/ |
418 |
void |
419 |
channel_member_names(struct Client *client_p, struct Channel *chptr, int show_eon) |
420 |
{ |
421 |
dlink_node *node; |
422 |
char buf[IRCD_BUFSIZE + 1] = ""; |
423 |
char *t = NULL, *start = NULL; |
424 |
int tlen = 0; |
425 |
const int is_member = IsMember(client_p, chptr); |
426 |
const int multi_prefix = HasCap(client_p, CAP_MULTI_PREFIX) != 0; |
427 |
const int uhnames = HasCap(client_p, CAP_UHNAMES) != 0; |
428 |
|
429 |
assert(IsClient(client_p)); |
430 |
|
431 |
if (PubChannel(chptr) || is_member) |
432 |
{ |
433 |
t = buf + snprintf(buf, sizeof(buf), numeric_form(RPL_NAMREPLY), |
434 |
me.name, client_p->name, |
435 |
channel_pub_or_secret(chptr), chptr->name); |
436 |
start = t; |
437 |
|
438 |
DLINK_FOREACH(node, chptr->members.head) |
439 |
{ |
440 |
const struct Membership *member = node->data; |
441 |
|
442 |
if (HasUMode(member->client_p, UMODE_INVISIBLE) && !is_member) |
443 |
continue; |
444 |
|
445 |
if (uhnames) |
446 |
tlen = strlen(member->client_p->name) + strlen(member->client_p->username) + |
447 |
strlen(member->client_p->host) + 3; /* +3 for ! + @ + space */ |
448 |
else |
449 |
tlen = strlen(member->client_p->name) + 1; /* +1 for space */ |
450 |
|
451 |
if (multi_prefix) |
452 |
{ |
453 |
if (member->flags & CHFL_CHANOP) |
454 |
++tlen; |
455 |
if (member->flags & CHFL_HALFOP) |
456 |
++tlen; |
457 |
if (member->flags & CHFL_VOICE) |
458 |
++tlen; |
459 |
} |
460 |
else |
461 |
{ |
462 |
if (member->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE)) |
463 |
++tlen; |
464 |
} |
465 |
|
466 |
if (t + tlen - buf > IRCD_BUFSIZE - 2) |
467 |
{ |
468 |
*(t - 1) = '\0'; |
469 |
sendto_one(client_p, "%s", buf); |
470 |
t = start; |
471 |
} |
472 |
|
473 |
if (uhnames) |
474 |
t += sprintf(t, "%s%s!%s@%s ", get_member_status(member, multi_prefix), |
475 |
member->client_p->name, member->client_p->username, |
476 |
member->client_p->host); |
477 |
else |
478 |
t += sprintf(t, "%s%s ", get_member_status(member, multi_prefix), |
479 |
member->client_p->name); |
480 |
} |
481 |
|
482 |
if (tlen) |
483 |
{ |
484 |
*(t - 1) = '\0'; |
485 |
sendto_one(client_p, "%s", buf); |
486 |
} |
487 |
} |
488 |
|
489 |
if (show_eon) |
490 |
sendto_one_numeric(client_p, &me, RPL_ENDOFNAMES, chptr->name); |
491 |
} |
492 |
|
493 |
static struct Invite * |
494 |
find_invite(struct Channel *chptr, struct Client *client_p) |
495 |
{ |
496 |
dlink_node *node, *node_next; |
497 |
dlink_list *list; |
498 |
|
499 |
/* Take the shortest of the two lists */ |
500 |
if (dlink_list_length(&client_p->connection->invited) < dlink_list_length(&chptr->invites)) |
501 |
list = &client_p->connection->invited; |
502 |
else |
503 |
list = &chptr->invites; |
504 |
|
505 |
DLINK_FOREACH_SAFE(node, node_next, list->head) |
506 |
{ |
507 |
struct Invite *invite = node->data; |
508 |
|
509 |
if (ConfigChannel.invite_expire_time && |
510 |
ConfigChannel.invite_expire_time + invite->when < CurrentTime) |
511 |
del_invite(invite); |
512 |
else if (invite->chptr == chptr && invite->client_p == client_p) |
513 |
return invite; |
514 |
} |
515 |
|
516 |
return NULL; |
517 |
} |
518 |
|
519 |
/*! \brief Adds client to invite list |
520 |
* \param chptr Pointer to channel block |
521 |
* \param client_p Pointer to client to add invite to |
522 |
*/ |
523 |
void |
524 |
add_invite(struct Channel *chptr, struct Client *client_p) |
525 |
{ |
526 |
struct Invite *invite; |
527 |
if ((invite = find_invite(chptr, client_p))) |
528 |
del_invite(invite); |
529 |
|
530 |
invite = xcalloc(sizeof(*invite)); |
531 |
invite->client_p = client_p; |
532 |
invite->chptr = chptr; |
533 |
invite->when = CurrentTime; |
534 |
|
535 |
/* Delete last link in chain if the list is max length */ |
536 |
while (dlink_list_length(&client_p->connection->invited) && |
537 |
dlink_list_length(&client_p->connection->invited) >= ConfigChannel.max_invites) |
538 |
del_invite(client_p->connection->invited.tail->data); |
539 |
|
540 |
/* Add client to channel invite list */ |
541 |
dlinkAdd(invite, &invite->chan_node, &chptr->invites); |
542 |
|
543 |
/* Add channel to the end of the client invite list */ |
544 |
dlinkAdd(invite, &invite->user_node, &client_p->connection->invited); |
545 |
} |
546 |
|
547 |
/*! \brief Delete Invite block from channel invite list |
548 |
* and client invite list |
549 |
* \param invite Pointer to Invite struct |
550 |
*/ |
551 |
void |
552 |
del_invite(struct Invite *invite) |
553 |
{ |
554 |
dlinkDelete(&invite->user_node, &invite->client_p->connection->invited); |
555 |
dlinkDelete(&invite->chan_node, &invite->chptr->invites); |
556 |
|
557 |
/* Release memory pointed to by 'invite' */ |
558 |
xfree(invite); |
559 |
} |
560 |
|
561 |
/*! \brief Removes and frees all Invite blocks from a list |
562 |
* \param list Pointer to a dlink_list |
563 |
*/ |
564 |
void |
565 |
clear_invite_list(dlink_list *list) |
566 |
{ |
567 |
while (list->head) |
568 |
del_invite(list->head->data); |
569 |
} |
570 |
|
571 |
/* get_member_status() |
572 |
* |
573 |
* inputs - pointer to struct Membership |
574 |
* - YES if we can combine different flags |
575 |
* output - string either @, +, % or "" depending on whether |
576 |
* chanop, voiced or user |
577 |
* side effects - |
578 |
* |
579 |
* NOTE: Returned string is usually a static buffer |
580 |
* (like in client_get_name) |
581 |
*/ |
582 |
const char * |
583 |
get_member_status(const struct Membership *member, const int combine) |
584 |
{ |
585 |
static char buffer[CMEMBER_STATUS_FLAGS_LEN + 1]; /* +1 for \0 */ |
586 |
char *p = buffer; |
587 |
|
588 |
if (member->flags & CHFL_CHANOP) |
589 |
{ |
590 |
if (!combine) |
591 |
return "@"; |
592 |
*p++ = '@'; |
593 |
} |
594 |
|
595 |
if (member->flags & CHFL_HALFOP) |
596 |
{ |
597 |
if (!combine) |
598 |
return "%"; |
599 |
*p++ = '%'; |
600 |
} |
601 |
|
602 |
if (member->flags & CHFL_VOICE) |
603 |
*p++ = '+'; |
604 |
*p = '\0'; |
605 |
|
606 |
return buffer; |
607 |
} |
608 |
|
609 |
/*! |
610 |
* \param client_p Pointer to Client to check |
611 |
* \param list Pointer to ban list to search |
612 |
* \return 1 if ban found for given n!u\@h mask, 0 otherwise |
613 |
*/ |
614 |
static int |
615 |
find_bmask(const struct Client *client_p, const dlink_list *list) |
616 |
{ |
617 |
dlink_node *node; |
618 |
|
619 |
DLINK_FOREACH(node, list->head) |
620 |
{ |
621 |
const struct Ban *ban = node->data; |
622 |
|
623 |
if (!match(ban->name, client_p->name) && !match(ban->user, client_p->username)) |
624 |
{ |
625 |
switch (ban->type) |
626 |
{ |
627 |
case HM_HOST: |
628 |
if (!match(ban->host, client_p->host) || !match(ban->host, client_p->sockhost)) |
629 |
return 1; |
630 |
break; |
631 |
case HM_IPV4: |
632 |
if (client_p->ip.ss.ss_family == AF_INET) |
633 |
if (match_ipv4(&client_p->ip, &ban->addr, ban->bits)) |
634 |
return 1; |
635 |
break; |
636 |
case HM_IPV6: |
637 |
if (client_p->ip.ss.ss_family == AF_INET6) |
638 |
if (match_ipv6(&client_p->ip, &ban->addr, ban->bits)) |
639 |
return 1; |
640 |
break; |
641 |
default: |
642 |
assert(0); |
643 |
} |
644 |
} |
645 |
} |
646 |
|
647 |
return 0; |
648 |
} |
649 |
|
650 |
/*! |
651 |
* \param chptr Pointer to channel block |
652 |
* \param client_p Pointer to client to check access fo |
653 |
* \return 0 if not banned, 1 otherwise |
654 |
*/ |
655 |
int |
656 |
is_banned(const struct Channel *chptr, const struct Client *client_p) |
657 |
{ |
658 |
if (find_bmask(client_p, &chptr->banlist)) |
659 |
if (!find_bmask(client_p, &chptr->exceptlist)) |
660 |
return 1; |
661 |
|
662 |
return 0; |
663 |
} |
664 |
|
665 |
/*! Tests if a client can join a certain channel |
666 |
* \param client_p Pointer to client attempting to join |
667 |
* \param chptr Pointer to channel |
668 |
* \param key Key sent by client attempting to join if present |
669 |
* \return ERR_BANNEDFROMCHAN, ERR_INVITEONLYCHAN, ERR_CHANNELISFULL |
670 |
* or 0 if allowed to join. |
671 |
*/ |
672 |
static int |
673 |
can_join(struct Client *client_p, struct Channel *chptr, const char *key) |
674 |
{ |
675 |
if (HasCMode(chptr, MODE_SSLONLY) && !HasUMode(client_p, UMODE_SSL)) |
676 |
return ERR_SSLONLYCHAN; |
677 |
|
678 |
if (HasCMode(chptr, MODE_REGONLY) && !HasUMode(client_p, UMODE_REGISTERED)) |
679 |
return ERR_NEEDREGGEDNICK; |
680 |
|
681 |
if (HasCMode(chptr, MODE_OPERONLY) && !HasUMode(client_p, UMODE_OPER)) |
682 |
return ERR_OPERONLYCHAN; |
683 |
|
684 |
if (HasCMode(chptr, MODE_INVITEONLY)) |
685 |
if (!find_invite(chptr, client_p)) |
686 |
if (!find_bmask(client_p, &chptr->invexlist)) |
687 |
return ERR_INVITEONLYCHAN; |
688 |
|
689 |
if (chptr->mode.key[0] && (!key || strcmp(chptr->mode.key, key))) |
690 |
return ERR_BADCHANNELKEY; |
691 |
|
692 |
if (chptr->mode.limit && dlink_list_length(&chptr->members) >= |
693 |
chptr->mode.limit) |
694 |
return ERR_CHANNELISFULL; |
695 |
|
696 |
if (is_banned(chptr, client_p)) |
697 |
return ERR_BANNEDFROMCHAN; |
698 |
|
699 |
return 0; |
700 |
} |
701 |
|
702 |
int |
703 |
has_member_flags(const struct Membership *member, const unsigned int flags) |
704 |
{ |
705 |
return member && (member->flags & flags); |
706 |
} |
707 |
|
708 |
struct Membership * |
709 |
find_channel_link(const struct Client *client_p, const struct Channel *chptr) |
710 |
{ |
711 |
dlink_node *node; |
712 |
|
713 |
if (!IsClient(client_p)) |
714 |
return NULL; |
715 |
|
716 |
/* Take the shortest of the two lists */ |
717 |
if (dlink_list_length(&chptr->members) < dlink_list_length(&client_p->channel)) |
718 |
{ |
719 |
DLINK_FOREACH(node, chptr->members.head) |
720 |
if (((struct Membership *)node->data)->client_p == client_p) |
721 |
return node->data; |
722 |
} |
723 |
else |
724 |
{ |
725 |
DLINK_FOREACH(node, client_p->channel.head) |
726 |
if (((struct Membership *)node->data)->chptr == chptr) |
727 |
return node->data; |
728 |
} |
729 |
|
730 |
return NULL; |
731 |
} |
732 |
|
733 |
/*! Checks if a message contains control codes |
734 |
* \param message The actual message string the client wants to send |
735 |
* \return 1 if the message does contain any control codes, 0 otherwise |
736 |
*/ |
737 |
static int |
738 |
msg_has_ctrls(const char *message) |
739 |
{ |
740 |
const unsigned char *p = (const unsigned char *)message; |
741 |
|
742 |
for (; *p; ++p) |
743 |
{ |
744 |
if (*p > 31 || *p == 1) |
745 |
continue; /* No control code or CTCP */ |
746 |
|
747 |
if (*p == 27) /* Escape */ |
748 |
{ |
749 |
/* ISO 2022 charset shift sequence */ |
750 |
if (*(p + 1) == '$' || |
751 |
*(p + 1) == '(') |
752 |
{ |
753 |
++p; |
754 |
continue; |
755 |
} |
756 |
} |
757 |
|
758 |
return 1; /* Control code */ |
759 |
} |
760 |
|
761 |
return 0; /* No control code found */ |
762 |
} |
763 |
|
764 |
/*! Tests if a client can send to a channel |
765 |
* \param chptr Pointer to Channel struct |
766 |
* \param client_p Pointer to Client struct |
767 |
* \param member Pointer to Membership struct (can be NULL) |
768 |
* \param message The actual message string the client wants to send |
769 |
* \return CAN_SEND_OPV if op or voiced on channel\n |
770 |
* CAN_SEND_NONOP if can send to channel but is not an op\n |
771 |
* ERR_CANNOTSENDTOCHAN or ERR_NEEDREGGEDNICK if they cannot send to channel\n |
772 |
*/ |
773 |
int |
774 |
can_send(struct Channel *chptr, struct Client *client_p, |
775 |
struct Membership *member, const char *message, int notice) |
776 |
{ |
777 |
const struct ResvItem *resv = NULL; |
778 |
|
779 |
if (IsServer(client_p) || HasFlag(client_p, FLAGS_SERVICE)) |
780 |
return CAN_SEND_OPV; |
781 |
|
782 |
if (MyConnect(client_p) && !HasFlag(client_p, FLAGS_EXEMPTRESV)) |
783 |
if (!(HasUMode(client_p, UMODE_OPER) && HasOFlag(client_p, OPER_FLAG_JOIN_RESV))) |
784 |
if ((resv = resv_find(chptr->name, match)) && !resv_exempt_find(client_p, resv)) |
785 |
return ERR_CANNOTSENDTOCHAN; |
786 |
|
787 |
if (HasCMode(chptr, MODE_NOCTRL) && msg_has_ctrls(message)) |
788 |
return ERR_NOCTRLSONCHAN; |
789 |
|
790 |
if (HasCMode(chptr, MODE_NOCTCP)) |
791 |
if (*message == '\001' && strncmp(message + 1, "ACTION ", 7)) |
792 |
return ERR_NOCTCP; |
793 |
|
794 |
if (member || (member = find_channel_link(client_p, chptr))) |
795 |
if (member->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE)) |
796 |
return CAN_SEND_OPV; |
797 |
|
798 |
if (member == NULL && HasCMode(chptr, MODE_NOPRIVMSGS)) |
799 |
return ERR_CANNOTSENDTOCHAN; |
800 |
|
801 |
if (HasCMode(chptr, MODE_MODERATED)) |
802 |
return ERR_CANNOTSENDTOCHAN; |
803 |
|
804 |
if (HasCMode(chptr, MODE_MODREG) && !HasUMode(client_p, UMODE_REGISTERED)) |
805 |
return ERR_NEEDREGGEDNICK; |
806 |
|
807 |
if (HasCMode(chptr, MODE_NONOTICE) && notice) |
808 |
return ERR_CANNOTSENDTOCHAN; |
809 |
|
810 |
/* Cache can send if banned */ |
811 |
if (MyConnect(client_p)) |
812 |
{ |
813 |
if (member) |
814 |
{ |
815 |
if (member->flags & CHFL_BAN_SILENCED) |
816 |
return ERR_CANNOTSENDTOCHAN; |
817 |
|
818 |
if (!(member->flags & CHFL_BAN_CHECKED)) |
819 |
{ |
820 |
if (is_banned(chptr, client_p)) |
821 |
{ |
822 |
member->flags |= (CHFL_BAN_CHECKED | CHFL_BAN_SILENCED); |
823 |
return ERR_CANNOTSENDTOCHAN; |
824 |
} |
825 |
|
826 |
member->flags |= CHFL_BAN_CHECKED; |
827 |
} |
828 |
} |
829 |
else if (is_banned(chptr, client_p)) |
830 |
return ERR_CANNOTSENDTOCHAN; |
831 |
} |
832 |
|
833 |
return CAN_SEND_NONOP; |
834 |
} |
835 |
|
836 |
/*! \brief Updates the client's oper_warn_count_down, warns the |
837 |
* IRC operators if necessary, and updates |
838 |
* join_leave_countdown as needed. |
839 |
* \param client_p Pointer to struct Client to check |
840 |
* \param name Channel name or NULL if this is a part. |
841 |
*/ |
842 |
void |
843 |
check_spambot_warning(struct Client *client_p, const char *name) |
844 |
{ |
845 |
if (GlobalSetOptions.spam_num && |
846 |
(client_p->connection->join_leave_count >= GlobalSetOptions.spam_num)) |
847 |
{ |
848 |
if (client_p->connection->oper_warn_count_down > 0) |
849 |
client_p->connection->oper_warn_count_down--; |
850 |
else |
851 |
client_p->connection->oper_warn_count_down = 0; |
852 |
|
853 |
if (client_p->connection->oper_warn_count_down == 0) |
854 |
{ |
855 |
/* It's already known as a possible spambot */ |
856 |
if (name) |
857 |
sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE, |
858 |
"User %s (%s@%s) trying to join %s is a possible spambot", |
859 |
client_p->name, client_p->username, |
860 |
client_p->host, name); |
861 |
else |
862 |
sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE, |
863 |
"User %s (%s@%s) is a possible spambot", |
864 |
client_p->name, client_p->username, |
865 |
client_p->host); |
866 |
client_p->connection->oper_warn_count_down = OPER_SPAM_COUNTDOWN; |
867 |
} |
868 |
} |
869 |
else |
870 |
{ |
871 |
int t_delta = CurrentTime - client_p->connection->last_leave_time; |
872 |
if (t_delta > JOIN_LEAVE_COUNT_EXPIRE_TIME) |
873 |
{ |
874 |
int decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME); |
875 |
if (decrement_count > client_p->connection->join_leave_count) |
876 |
client_p->connection->join_leave_count = 0; |
877 |
else |
878 |
client_p->connection->join_leave_count -= decrement_count; |
879 |
} |
880 |
else |
881 |
{ |
882 |
if ((CurrentTime - (client_p->connection->last_join_time)) < |
883 |
GlobalSetOptions.spam_time) |
884 |
client_p->connection->join_leave_count++; /* It's a possible spambot */ |
885 |
} |
886 |
|
887 |
if (name) |
888 |
client_p->connection->last_join_time = CurrentTime; |
889 |
else |
890 |
client_p->connection->last_leave_time = CurrentTime; |
891 |
} |
892 |
} |
893 |
|
894 |
/*! \brief Sets the channel topic for a certain channel |
895 |
* \param chptr Pointer to struct Channel |
896 |
* \param topic The topic string |
897 |
* \param topic_info n!u\@h formatted string of the topic setter |
898 |
* \param topicts Timestamp on the topic |
899 |
* \param local Whether the topic is set by a local client |
900 |
*/ |
901 |
void |
902 |
channel_set_topic(struct Channel *chptr, const char *topic, |
903 |
const char *topic_info, uintmax_t topicts, int local) |
904 |
{ |
905 |
if (local) |
906 |
strlcpy(chptr->topic, topic, IRCD_MIN(sizeof(chptr->topic), ConfigServerInfo.max_topic_length + 1)); |
907 |
else |
908 |
strlcpy(chptr->topic, topic, sizeof(chptr->topic)); |
909 |
|
910 |
strlcpy(chptr->topic_info, topic_info, sizeof(chptr->topic_info)); |
911 |
chptr->topic_time = topicts; |
912 |
} |
913 |
|
914 |
void |
915 |
channel_do_join(struct Client *client_p, char *chan_list, char *key_list) |
916 |
{ |
917 |
char *p = NULL; |
918 |
const struct ResvItem *resv = NULL; |
919 |
const struct ClassItem *const class = class_get_ptr(&client_p->connection->confs); |
920 |
unsigned int flags = 0; |
921 |
|
922 |
assert(MyClient(client_p)); |
923 |
|
924 |
for (const char *name = strtok_r(chan_list, ",", &p); name; |
925 |
name = strtok_r(NULL, ",", &p)) |
926 |
{ |
927 |
const char *key = NULL; |
928 |
|
929 |
/* If we have any more keys, take the first for this channel. */ |
930 |
if (!EmptyString(key_list) && (key_list = strchr(key = key_list, ','))) |
931 |
*key_list++ = '\0'; |
932 |
|
933 |
/* Empty keys are the same as no keys. */ |
934 |
if (key && *key == '\0') |
935 |
key = NULL; |
936 |
|
937 |
if (channel_check_name(name, 1) == 0) |
938 |
{ |
939 |
sendto_one_numeric(client_p, &me, ERR_BADCHANNAME, name); |
940 |
continue; |
941 |
} |
942 |
|
943 |
if (!HasFlag(client_p, FLAGS_EXEMPTRESV) && |
944 |
!(HasUMode(client_p, UMODE_OPER) && HasOFlag(client_p, OPER_FLAG_JOIN_RESV)) && |
945 |
((resv = resv_find(name, match)) && !resv_exempt_find(client_p, resv))) |
946 |
{ |
947 |
sendto_one_numeric(client_p, &me, ERR_CHANBANREASON, name, resv->reason); |
948 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
949 |
"Forbidding reserved channel %s from user %s", |
950 |
name, client_get_name(client_p, HIDE_IP)); |
951 |
continue; |
952 |
} |
953 |
|
954 |
if (dlink_list_length(&client_p->channel) >= |
955 |
((class->max_channels) ? class->max_channels : ConfigChannel.max_channels)) |
956 |
{ |
957 |
sendto_one_numeric(client_p, &me, ERR_TOOMANYCHANNELS, name); |
958 |
break; |
959 |
} |
960 |
|
961 |
struct Channel *chptr; |
962 |
if ((chptr = hash_find_channel(name))) |
963 |
{ |
964 |
if (IsMember(client_p, chptr)) |
965 |
continue; |
966 |
|
967 |
/* can_join() checks for +i, +l, key, bans, etc. */ |
968 |
int ret = can_join(client_p, chptr, key); |
969 |
if (ret) |
970 |
{ |
971 |
sendto_one_numeric(client_p, &me, ret, chptr->name); |
972 |
continue; |
973 |
} |
974 |
|
975 |
/* |
976 |
* This should never be the case unless there is some sort of |
977 |
* persistant channels. |
978 |
*/ |
979 |
if (dlink_list_length(&chptr->members) == 0) |
980 |
flags = CHFL_CHANOP; |
981 |
else |
982 |
flags = 0; |
983 |
} |
984 |
else |
985 |
{ |
986 |
flags = CHFL_CHANOP; |
987 |
chptr = channel_make(name); |
988 |
} |
989 |
|
990 |
if (!HasUMode(client_p, UMODE_OPER)) |
991 |
check_spambot_warning(client_p, chptr->name); |
992 |
|
993 |
add_user_to_channel(chptr, client_p, flags, 1); |
994 |
|
995 |
/* |
996 |
* Set timestamp if appropriate, and propagate |
997 |
*/ |
998 |
if (flags == CHFL_CHANOP) |
999 |
{ |
1000 |
chptr->creationtime = CurrentTime; |
1001 |
AddCMode(chptr, MODE_TOPICLIMIT); |
1002 |
AddCMode(chptr, MODE_NOPRIVMSGS); |
1003 |
|
1004 |
sendto_server(NULL, 0, 0, ":%s SJOIN %ju %s +nt :@%s", |
1005 |
me.id, chptr->creationtime, |
1006 |
chptr->name, client_p->id); |
1007 |
|
1008 |
/* |
1009 |
* Notify all other users on the new channel |
1010 |
*/ |
1011 |
sendto_channel_local(NULL, chptr, 0, CAP_EXTENDED_JOIN, 0, ":%s!%s@%s JOIN %s %s :%s", |
1012 |
client_p->name, client_p->username, |
1013 |
client_p->host, chptr->name, client_p->account, client_p->info); |
1014 |
sendto_channel_local(NULL, chptr, 0, 0, CAP_EXTENDED_JOIN, ":%s!%s@%s JOIN :%s", |
1015 |
client_p->name, client_p->username, |
1016 |
client_p->host, chptr->name); |
1017 |
sendto_channel_local(NULL, chptr, 0, 0, 0, ":%s MODE %s +nt", |
1018 |
me.name, chptr->name); |
1019 |
} |
1020 |
else |
1021 |
{ |
1022 |
sendto_server(NULL, 0, 0, ":%s JOIN %ju %s +", |
1023 |
client_p->id, chptr->creationtime, |
1024 |
chptr->name); |
1025 |
|
1026 |
sendto_channel_local(NULL, chptr, 0, CAP_EXTENDED_JOIN, 0, ":%s!%s@%s JOIN %s %s :%s", |
1027 |
client_p->name, client_p->username, |
1028 |
client_p->host, chptr->name, client_p->account, client_p->info); |
1029 |
sendto_channel_local(NULL, chptr, 0, 0, CAP_EXTENDED_JOIN, ":%s!%s@%s JOIN :%s", |
1030 |
client_p->name, client_p->username, |
1031 |
client_p->host, chptr->name); |
1032 |
} |
1033 |
|
1034 |
if (client_p->away[0]) |
1035 |
sendto_channel_local(client_p, chptr, 0, CAP_AWAY_NOTIFY, 0, |
1036 |
":%s!%s@%s AWAY :%s", |
1037 |
client_p->name, client_p->username, |
1038 |
client_p->host, client_p->away); |
1039 |
|
1040 |
struct Invite *invite; |
1041 |
if ((invite = find_invite(chptr, client_p))) |
1042 |
del_invite(invite); |
1043 |
|
1044 |
if (chptr->topic[0]) |
1045 |
{ |
1046 |
sendto_one_numeric(client_p, &me, RPL_TOPIC, chptr->name, chptr->topic); |
1047 |
sendto_one_numeric(client_p, &me, RPL_TOPICWHOTIME, chptr->name, |
1048 |
chptr->topic_info, chptr->topic_time); |
1049 |
} |
1050 |
|
1051 |
channel_member_names(client_p, chptr, 1); |
1052 |
|
1053 |
client_p->connection->last_join_time = CurrentTime; |
1054 |
} |
1055 |
} |
1056 |
|
1057 |
/*! \brief Removes a client from a specific channel |
1058 |
* \param client_p Pointer to client to remove |
1059 |
* \param name Name of channel to remove from |
1060 |
* \param reason Part reason to show |
1061 |
*/ |
1062 |
static void |
1063 |
channel_part_one_client(struct Client *client_p, const char *name, const char *reason) |
1064 |
{ |
1065 |
struct Channel *chptr = NULL; |
1066 |
struct Membership *member = NULL; |
1067 |
|
1068 |
if ((chptr = hash_find_channel(name)) == NULL) |
1069 |
{ |
1070 |
sendto_one_numeric(client_p, &me, ERR_NOSUCHCHANNEL, name); |
1071 |
return; |
1072 |
} |
1073 |
|
1074 |
if ((member = find_channel_link(client_p, chptr)) == NULL) |
1075 |
{ |
1076 |
sendto_one_numeric(client_p, &me, ERR_NOTONCHANNEL, chptr->name); |
1077 |
return; |
1078 |
} |
1079 |
|
1080 |
if (MyConnect(client_p) && !HasUMode(client_p, UMODE_OPER)) |
1081 |
check_spambot_warning(client_p, NULL); |
1082 |
|
1083 |
/* |
1084 |
* Remove user from the old channel (if any) |
1085 |
* only allow /part reasons in -m chans |
1086 |
*/ |
1087 |
if (*reason && (!MyConnect(client_p) || |
1088 |
((client_p->connection->firsttime + |
1089 |
ConfigGeneral.anti_spam_exit_message_time) < CurrentTime && |
1090 |
can_send(chptr, client_p, member, reason, 0) < 0))) |
1091 |
{ |
1092 |
sendto_server(client_p, 0, 0, ":%s PART %s :%s", |
1093 |
client_p->id, chptr->name, reason); |
1094 |
sendto_channel_local(NULL, chptr, 0, 0, 0, ":%s!%s@%s PART %s :%s", |
1095 |
client_p->name, client_p->username, |
1096 |
client_p->host, chptr->name, reason); |
1097 |
} |
1098 |
else |
1099 |
{ |
1100 |
sendto_server(client_p, 0, 0, ":%s PART %s", |
1101 |
client_p->id, chptr->name); |
1102 |
sendto_channel_local(NULL, chptr, 0, 0, 0, ":%s!%s@%s PART %s", |
1103 |
client_p->name, client_p->username, |
1104 |
client_p->host, chptr->name); |
1105 |
} |
1106 |
|
1107 |
remove_user_from_channel(member); |
1108 |
} |
1109 |
|
1110 |
void |
1111 |
channel_do_part(struct Client *client_p, char *channel, const char *reason) |
1112 |
{ |
1113 |
char *p = NULL; |
1114 |
char buf[KICKLEN + 1] = ""; |
1115 |
|
1116 |
assert(IsClient(client_p)); |
1117 |
|
1118 |
if (!EmptyString(reason)) |
1119 |
strlcpy(buf, reason, sizeof(buf)); |
1120 |
|
1121 |
for (const char *name = strtok_r(channel, ",", &p); name; |
1122 |
name = strtok_r(NULL, ",", &p)) |
1123 |
channel_part_one_client(client_p, name, buf); |
1124 |
} |