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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) 1997 Jukka Santala (Donwulff) |
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* Copyright (C) 2005 by the Hybrid Development Team. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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* USA |
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*/ |
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|
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/*! \file watch.c |
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* \brief File including functions for WATCH support |
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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 "balloc.h" |
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#include "s_user.h" |
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#include "s_misc.h" |
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#include "client.h" |
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#include "hash.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 "conf.h" |
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#include "s_serv.h" |
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#include "send.h" |
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#include "supported.h" |
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#include "whowas.h" |
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#include "memory.h" |
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#include "packet.h" |
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#include "watch.h" |
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|
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#define WATCH_HEAP_SIZE 32 |
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|
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static dlink_list watchTable[HASHSIZE]; |
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|
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static BlockHeap *watch_heap = NULL; |
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|
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/*! \brief Initializes the watch table |
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*/ |
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void |
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watch_init(void) |
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{ |
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watch_heap = BlockHeapCreate("watch", sizeof(struct Watch), WATCH_HEAP_SIZE); |
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} |
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|
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/* |
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* Rough figure of the datastructures for watch: |
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* |
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* NOTIFY HASH client_p1 |
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* | |- nick1 |
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* nick1-|- client_p1 |- nick2 |
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* | |- client_p2 client_p3 |
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* | |- client_p3 client_p2 |- nick1 |
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* | |- nick1 |
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* nick2-|- client_p2 |- nick2 |
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* |- client_p1 |
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*/ |
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|
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/*! \brief Counts up memory used by watch list headers |
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*/ |
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void |
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watch_count_memory(unsigned int *const count, uint64_t *const memory) |
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{ |
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unsigned int idx; |
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|
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for (idx = 0; idx < HASHSIZE; ++idx) |
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*count += dlink_list_length(&watchTable[idx]); |
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|
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*memory = *count * sizeof(struct Watch); |
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} |
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|
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/*! \brief Notifies all clients that have client_p's nick name on |
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* their watch list. |
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* \param client_p pointer to Client struct |
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* \param reply numeric to send. Either RPL_LOGON or RPL_LOGOFF |
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*/ |
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void |
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watch_check_hash(struct Client *client_p, int reply) |
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{ |
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struct Watch *anptr = NULL; |
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dlink_node *ptr = NULL; |
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assert(IsClient(client_p)); |
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if ((anptr = watch_find_hash(client_p->name)) == NULL) |
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return; /* This nick isn't on watch */ |
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|
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/* Update the time of last change to item */ |
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anptr->lasttime = CurrentTime; |
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|
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/* Send notifies out to everybody on the list in header */ |
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DLINK_FOREACH(ptr, anptr->watched_by.head) |
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{ |
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struct Client *target_p = ptr->data; |
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|
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sendto_one(target_p, form_str(reply), |
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me.name, target_p->name, client_p->name, |
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client_p->username, client_p->host, |
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anptr->lasttime, client_p->info); |
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} |
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} |
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|
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/*! \brief Looks up the watch table for a given nick |
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* \param name nick name to look up |
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*/ |
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struct Watch * |
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watch_find_hash(const char *name) |
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{ |
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dlink_node *ptr = NULL; |
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|
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DLINK_FOREACH(ptr, watchTable[strhash(name)].head) |
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{ |
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struct Watch *anptr = ptr->data; |
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|
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if (!irccmp(anptr->nick, name)) |
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return anptr; |
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} |
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|
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return NULL; |
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} |
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|
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/*! \brief Adds a watch entry to client_p's watch list |
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* \param nick nick name to add |
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* \param client_p Pointer to Client struct |
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*/ |
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void |
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watch_add_to_hash_table(const char *nick, struct Client *client_p) |
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{ |
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struct Watch *anptr = NULL; |
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dlink_node *ptr = NULL; |
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|
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/* If found NULL (no header for this nick), make one... */ |
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if ((anptr = watch_find_hash(nick)) == NULL) |
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{ |
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anptr = BlockHeapAlloc(watch_heap); |
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anptr->lasttime = CurrentTime; |
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strlcpy(anptr->nick, nick, sizeof(anptr->nick)); |
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|
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dlinkAdd(anptr, &anptr->node, &watchTable[strhash(nick)]); |
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} |
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else |
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{ |
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/* Is this client already on the watch-list? */ |
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ptr = dlinkFind(&anptr->watched_by, client_p); |
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} |
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|
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if (ptr == NULL) |
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{ |
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/* No it isn't, so add it in the bucket and client addint it */ |
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dlinkAdd(client_p, make_dlink_node(), &anptr->watched_by); |
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dlinkAdd(anptr, make_dlink_node(), &client_p->localClient->watches); |
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} |
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} |
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|
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/*! \brief Removes a single entry from client_p's watch list |
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* \param nick nick name to remove |
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* \param client_p Pointer to Client struct |
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*/ |
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void |
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watch_del_from_hash_table(const char *nick, struct Client *client_p) |
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{ |
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struct Watch *anptr = NULL; |
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dlink_node *ptr = NULL; |
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|
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if ((anptr = watch_find_hash(nick)) == NULL) |
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return; /* No header found for that nick. i.e. it's not being watched */ |
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|
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if ((ptr = dlinkFind(&anptr->watched_by, client_p)) == NULL) |
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return; /* This nick isn't being watched by client_p */ |
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|
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dlinkDelete(ptr, &anptr->watched_by); |
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free_dlink_node(ptr); |
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|
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if ((ptr = dlinkFindDelete(&client_p->localClient->watches, anptr))) |
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free_dlink_node(ptr); |
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|
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/* In case this header is now empty of notices, remove it */ |
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if (anptr->watched_by.head == NULL) |
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{ |
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assert(dlinkFind(&watchTable[strhash(nick)], anptr) != NULL); |
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dlinkDelete(&anptr->node, &watchTable[strhash(nick)]); |
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BlockHeapFree(watch_heap, anptr); |
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} |
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} |
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|
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/*! \brief Removes all entries from client_p's watch list |
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* and deletes headers that are no longer being watched. |
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* \param client_p Pointer to Client struct |
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*/ |
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void |
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watch_del_watch_list(struct Client *client_p) |
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{ |
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dlink_node *ptr = NULL, *ptr_next = NULL; |
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dlink_node *tmp = NULL; |
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|
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DLINK_FOREACH_SAFE(ptr, ptr_next, client_p->localClient->watches.head) |
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{ |
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struct Watch *anptr = ptr->data; |
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|
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assert(anptr); |
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|
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assert(dlinkFind(&anptr->watched_by, client_p) != NULL); |
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if ((tmp = dlinkFindDelete(&anptr->watched_by, client_p))) |
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free_dlink_node(tmp); |
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|
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/* If this leaves a header without notifies, remove it. */ |
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if (anptr->watched_by.head == NULL) |
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{ |
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assert(dlinkFind(&watchTable[strhash(anptr->nick)], anptr) != NULL); |
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dlinkDelete(&anptr->node, &watchTable[strhash(anptr->nick)]); |
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|
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BlockHeapFree(watch_heap, anptr); |
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} |
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|
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dlinkDelete(ptr, &client_p->localClient->watches); |
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free_dlink_node(ptr); |
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} |
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|
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assert(client_p->localClient->watches.head == NULL); |
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assert(client_p->localClient->watches.tail == NULL); |
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} |