2 * IRC - Internet Relay Chat, ircd/list.c
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Finland
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 1, or (at your option)
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "ircd_alloc.h"
27 #include "ircd_reply.h"
28 #include "ircd_string.h"
44 #include <stddef.h> /* offsetof */
45 #include <unistd.h> /* close */
49 static struct liststats {
51 } cloc, crem, users, servs, links;
54 static unsigned int localClientAllocCount;
55 static struct Client* localClientFreeList;
57 static unsigned int remoteClientAllocCount;
58 static struct Client* remoteClientFreeList;
60 static unsigned int slinkAllocCount;
61 static struct SLink* slinkFreeList;
68 * pre-allocate MAXCONNECTIONS local clients
70 for (i = 0; i < MAXCONNECTIONS; ++i) {
71 cptr = (struct Client*) MyMalloc(CLIENT_LOCAL_SIZE);
72 cptr->next = localClientFreeList;
73 localClientFreeList = cptr;
74 ++localClientAllocCount;
78 memset(&cloc, 0, sizeof(cloc));
79 memset(&crem, 0, sizeof(crem));
80 memset(&users, 0, sizeof(users));
81 memset(&servs, 0, sizeof(servs));
82 memset(&links, 0, sizeof(links));
87 * Create a new struct Client structure and set it to initial state.
89 * from == NULL, create local client (a client connected to a socket).
91 * from != NULL, create remote client (behind a socket associated with
92 * the client defined by 'from').
93 * ('from' is a local client!!).
95 struct Client* make_client(struct Client *from, int status)
97 struct Client* cptr = 0;
99 * Check freelists first to see if we can grab a client without
100 * having to call malloc.
106 if ((cptr = remoteClientFreeList))
107 remoteClientFreeList = cptr->next;
109 cptr = (struct Client*) MyMalloc(CLIENT_REMOTE_SIZE);
110 ++remoteClientAllocCount;
114 * NOTE: Do not remove this, a lot of code depends on the entire
115 * structure being zeroed out
117 memset(cptr, 0, CLIENT_REMOTE_SIZE); /* All variables are 0 by default */
124 if ((cptr = localClientFreeList))
125 localClientFreeList = cptr->next;
127 cptr = (struct Client*) MyMalloc(CLIENT_LOCAL_SIZE);
128 ++localClientAllocCount;
132 * NOTE: Do not remove this, a lot of code depends on the entire
133 * structure being zeroed out
135 memset(cptr, 0, CLIENT_LOCAL_SIZE); /* All variables are 0 by default */
138 cptr->since = cptr->lasttime = cptr->firsttime = CurrentTime;
139 cptr->lastnick = TStime();
140 cptr->nextnick = CurrentTime - NICK_DELAY;
141 cptr->nexttarget = CurrentTime - (TARGET_DELAY * (STARTTARGETS - 1));
142 cptr->handler = UNREGISTERED_HANDLER;
143 cptr->from = cptr; /* 'from' of local client is self! */
145 cptr->status = status;
147 strcpy(cptr->username, "unknown");
159 void free_client(struct Client* cptr)
164 * forget to remove the client from the hash table?
166 assert(cptr->hnext == cptr);
177 * make sure we have cleaned up local resources
180 --cptr->dns_reply->ref_count;
184 DBufClear(&cptr->sendQ);
185 DBufClear(&cptr->recvQ);
187 release_listener(cptr->listener);
188 cptr->next = localClientFreeList;
189 localClientFreeList = cptr;
192 cptr->next = remoteClientFreeList;
193 remoteClientFreeList = cptr;
197 struct Server *make_server(struct Client *cptr)
199 struct Server *serv = cptr->serv;
203 serv = (struct Server*) MyMalloc(sizeof(struct Server));
205 memset(serv, 0, sizeof(struct Server)); /* All variables are 0 by default */
210 cptr->serv->lag = 60000;
212 DupString(serv->last_error_msg, "<>"); /* String must be non-empty */
218 * Taken the code from ExitOneClient() for this and placed it here.
221 void remove_client_from_list(struct Client *cptr)
224 cptr->prev->next = cptr->next;
226 GlobalClientList = cptr->next;
227 GlobalClientList->prev = 0;
230 cptr->next->prev = cptr->prev;
232 cptr->next = cptr->prev = 0;
234 if (IsUser(cptr) && cptr->user) {
235 add_history(cptr, 0);
239 free_user(cptr->user);
244 if (cptr->serv->user) {
245 free_user(cptr->serv->user);
246 cptr->serv->user = 0;
248 if (cptr->serv->client_list)
249 MyFree(cptr->serv->client_list);
250 MyFree(cptr->serv->last_error_msg);
260 * Although only a small routine, it appears in a number of places
261 * as a collection of a few lines...functions like this *should* be
262 * in this file, shouldnt they ? after all, this is list.c, isn't it ?
265 void add_client_to_list(struct Client *cptr)
268 * Since we always insert new clients to the top of the list,
269 * this should mean the "me" is the bottom most item in the list.
270 * XXX - don't always count on the above, things change
273 cptr->next = GlobalClientList;
274 GlobalClientList = cptr;
276 cptr->next->prev = cptr;
280 * Look for ptr in the linked listed pointed to by link.
282 struct SLink *find_user_link(struct SLink *lp, struct Client *ptr)
286 if (lp->value.cptr == ptr)
294 struct SLink* make_link(void)
296 struct SLink* lp = slinkFreeList;
298 slinkFreeList = lp->next;
300 lp = (struct SLink*) MyMalloc(sizeof(struct SLink));
310 void free_link(struct SLink* lp)
313 lp->next = slinkFreeList;
321 struct DLink *add_dlink(struct DLink **lpp, struct Client *cp)
323 struct DLink* lp = (struct DLink*) MyMalloc(sizeof(struct DLink));
327 if ((lp->next = *lpp))
333 void remove_dlink(struct DLink **lpp, struct DLink *lp)
339 if ((lp->prev->next = lp->next))
340 lp->next->prev = lp->prev;
342 else if ((*lpp = lp->next))
343 lp->next->prev = NULL;
348 void send_listinfo(struct Client *cptr, char *name)
350 int inuse = 0, mem = 0, tmp = 0;
352 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":Local: inuse: %d(%d)",
353 inuse += cloc.inuse, tmp = cloc.inuse * CLIENT_LOCAL_SIZE);
355 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":Remote: inuse: %d(%d)",
356 crem.inuse, tmp = crem.inuse * CLIENT_REMOTE_SIZE);
359 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":Users: inuse: %d(%d)",
360 users.inuse, tmp = users.inuse * sizeof(struct User));
362 inuse += users.inuse;
363 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":Servs: inuse: %d(%d)",
364 servs.inuse, tmp = servs.inuse * sizeof(struct Server));
366 inuse += servs.inuse;
367 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":Links: inuse: %d(%d)",
368 links.inuse, tmp = links.inuse * sizeof(struct SLink));
370 inuse += links.inuse;
371 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":Confs: inuse: %d(%d)",
372 GlobalConfCount, tmp = GlobalConfCount * sizeof(struct ConfItem));
374 inuse += GlobalConfCount;
375 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":Totals: inuse %d %d",