| 1 |
/* |
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* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
| 3 |
* |
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* Copyright (C) 2000 Kevin L. Mitchell <klmitch@mit.edu> |
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* Copyright (C) 2013 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 motd.c |
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* \brief Message-of-the-day manipulation implementation. |
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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" |
| 30 |
#include "ircd.h" |
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#include "conf.h" |
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#include "send.h" |
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#include "s_serv.h" |
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#include "numeric.h" |
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#include "client.h" |
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#include "irc_string.h" |
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#include "memory.h" |
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#include "log.h" |
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#include "motd.h" |
| 40 |
#include "hostmask.h" |
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|
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|
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/** Global list of messages of the day. */ |
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static struct |
| 45 |
{ |
| 46 |
struct Motd *local; /**< Local MOTD. */ |
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struct Motd *remote; /**< Remote MOTD. */ |
| 48 |
dlink_list other; /**< MOTDs specified in configuration file. */ |
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dlink_list cachelist; /**< List of MotdCache entries. */ |
| 50 |
} MotdList; |
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|
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|
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/*! \brief Create a struct Motd and initialize it. |
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* \param hostmask Hostmask (or connection class name) to filter on. |
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* \param path Path to MOTD file. |
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*/ |
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static struct Motd * |
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motd_create(const char *hostmask, const char *path) |
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{ |
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struct Motd *tmp = MyMalloc(sizeof(struct Motd)); |
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|
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if (EmptyString(hostmask)) |
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tmp->type = MOTD_UNIVERSAL; |
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else if (class_find(hostmask, 1)) |
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tmp->type = MOTD_CLASS; |
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else |
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{ |
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switch (parse_netmask(hostmask, &tmp->address, &tmp->addrbits)) |
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{ |
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case HM_IPV4: |
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tmp->type = MOTD_IPMASKV4; |
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break; |
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#ifdef IPV6 |
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case HM_IPV6: |
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tmp->type = MOTD_IPMASKV6; |
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break; |
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#endif |
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default: /* HM_HOST */ |
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tmp->type = MOTD_HOSTMASK; |
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break; |
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} |
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} |
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|
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if (hostmask != NULL) |
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tmp->hostmask = xstrdup(hostmask); |
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|
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tmp->path = xstrdup(path); |
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tmp->maxcount = MOTD_MAXLINES; |
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|
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return tmp; |
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} |
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|
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/*! brief\ This function reads a motd out of a file (if needed) and caches it. |
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* If a matching cache entry already exists, reuse it. Otherwise, |
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* allocate and populate a new MotdCache for it. |
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* \param motd Specification for MOTD file. |
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* \return Matching MotdCache entry. |
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*/ |
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static struct MotdCache * |
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motd_cache(struct Motd *motd) |
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{ |
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FILE *file = NULL; |
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struct MotdCache *cache = NULL; |
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struct stat sb; |
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char line[MOTD_LINESIZE + 2]; /* \r\n */ |
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char *tmp = line; |
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unsigned int i = 0; |
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dlink_node *ptr = NULL; |
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|
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assert(motd); |
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assert(motd->path); |
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|
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if (motd->cache) |
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return motd->cache; |
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|
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/* try to find it in the list of cached files... */ |
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DLINK_FOREACH(ptr, MotdList.cachelist.head) |
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{ |
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cache = ptr->data; |
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|
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if (!strcmp(cache->path, motd->path) && cache->maxcount == motd->maxcount) |
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{ |
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cache->ref++; /* increase reference count... */ |
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motd->cache = cache; /* remember cache... */ |
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return motd->cache; /* return it */ |
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} |
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} |
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|
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/* gotta read in the file, now */ |
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if ((file = fopen(motd->path, "r")) == NULL) |
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{ |
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ilog(LOG_TYPE_IRCD, "Couldn't open \"%s\": %s", motd->path, |
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strerror(errno)); |
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return 0; |
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} |
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|
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/* need the file's modification time */ |
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if (stat(motd->path, &sb) == -1) |
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{ |
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fclose(file); |
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return 0; |
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} |
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|
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/* Ok, allocate a structure; we'll realloc later to trim memory */ |
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cache = MyMalloc(sizeof(struct MotdCache) + (MOTD_LINESIZE * (MOTD_MAXLINES - 1))); |
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cache->ref = 1; |
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cache->path = xstrdup(motd->path); |
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cache->maxcount = motd->maxcount; |
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cache->modtime = *localtime((time_t *)&sb.st_mtime); /* store modtime */ |
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|
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while (cache->count < cache->maxcount && fgets(line, sizeof(line), file)) |
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{ |
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/* copy over line, stopping when we overflow or hit line end */ |
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for (; i < (MOTD_LINESIZE - 1) && *tmp && *tmp != '\r' && *tmp != '\n'; ++tmp, ++i) |
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cache->motd[cache->count][i] = *tmp; |
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cache->motd[cache->count][i] = '\0'; |
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|
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cache->count++; |
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} |
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|
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fclose(file); /* close the file */ |
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|
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/* trim memory usage a little */ |
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motd->cache = MyMalloc(sizeof(struct MotdCache) + |
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(MOTD_LINESIZE * (cache->count - 1))); |
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memcpy(motd->cache, cache, sizeof(struct MotdCache) + |
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(MOTD_LINESIZE * (cache->count - 1))); |
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MyFree(cache); |
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|
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/* now link it in... */ |
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dlinkAdd(motd->cache, &motd->cache->node, &MotdList.cachelist); |
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|
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return motd->cache; |
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} |
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|
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/*! \brief Clear and dereference the Motd::cache element of \a motd. |
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* If the MotdCache::ref count goes to zero, free it. |
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* \param motd MOTD to uncache. |
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*/ |
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static void |
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motd_decache(struct Motd *motd) |
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{ |
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struct MotdCache *cache = NULL; |
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|
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assert(motd); |
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|
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if ((cache = motd->cache) == NULL) /* we can be called for records with no cache */ |
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return; |
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|
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motd->cache = NULL; /* zero the cache */ |
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|
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if (--cache->ref == 0) /* reduce reference count... */ |
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{ |
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dlinkDelete(&cache->node, &MotdList.cachelist); |
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MyFree(cache->path); /* free path info... */ |
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MyFree(cache); /* very simple for a reason... */ |
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} |
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} |
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|
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/*! \brief Deallocate a MOTD structure. |
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* If it has cached content, uncache it. |
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* \param motd MOTD to destroy. |
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*/ |
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static void |
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motd_destroy(struct Motd *motd) |
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{ |
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assert(motd); |
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|
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if (motd->cache) /* drop the cache */ |
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motd_decache(motd); |
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|
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dlinkDelete(&motd->node, &MotdList.other); |
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MyFree(motd->path); /* we always must have a path */ |
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MyFree(motd->hostmask); |
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MyFree(motd); |
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} |
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|
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/*! \brief Find the first matching MOTD block for a user. |
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* If the user is remote, always use remote MOTD. |
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* Otherwise, if there is a hostmask- or class-based MOTD that matches |
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* the user, use it. |
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* Otherwise, use the local MOTD. |
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* \param client_p Client to find MOTD for. |
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* \return Pointer to first matching MOTD for the client. |
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*/ |
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static struct Motd * |
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motd_lookup(struct Client *client_p) |
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{ |
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dlink_node *ptr = NULL; |
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const struct ClassItem *class = NULL; |
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|
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assert(client_p); |
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|
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if (!MyClient(client_p)) /* not my user, always return remote motd */ |
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return MotdList.remote; |
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|
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class = get_class_ptr(&client_p->localClient->confs); |
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assert(class); |
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|
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/* check the motd blocks first */ |
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DLINK_FOREACH(ptr, MotdList.other.head) |
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{ |
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struct Motd *motd = ptr->data; |
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|
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switch (motd->type) |
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{ |
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case MOTD_CLASS: |
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if (!match(motd->hostmask, class->name)) |
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return motd; |
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break; |
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case MOTD_HOSTMASK: |
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if (!match(motd->hostmask, client_p->host)) |
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return motd; |
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break; |
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case MOTD_IPMASKV4: |
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if (client_p->localClient->aftype == AF_INET) |
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if (match_ipv4(&client_p->localClient->ip, &motd->address, motd->addrbits)) |
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return motd; |
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break; |
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#ifdef IPV6 |
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case MOTD_IPMASKV6: |
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if (client_p->localClient->aftype == AF_INET6) |
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if (match_ipv6(&client_p->localClient->ip, &motd->address, motd->addrbits)) |
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return motd; |
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break; |
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#endif |
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default: break; |
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} |
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} |
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|
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return MotdList.local; /* Ok, return the default motd */ |
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} |
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|
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/*! \brief Send the content of a MotdCache to a user. |
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* If \a cache is NULL, simply send ERR_NOMOTD to the client. |
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* \param source_p Client to send MOTD to. |
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* \param cache MOTD body to send to client. |
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*/ |
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static void |
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motd_forward(struct Client *source_p, const struct MotdCache *cache) |
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{ |
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unsigned int i = 0; |
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const char *from = ID_or_name(&me, source_p->from); |
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const char *to = ID_or_name(source_p, source_p->from); |
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|
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assert(source_p); |
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|
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if (!cache) /* no motd to send */ |
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{ |
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sendto_one(source_p, form_str(ERR_NOMOTD), from, to); |
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return; |
| 292 |
} |
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|
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/* send the motd */ |
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sendto_one(source_p, form_str(RPL_MOTDSTART), |
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from, to, me.name); |
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|
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for (; i < cache->count; ++i) |
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sendto_one(source_p, form_str(RPL_MOTD), |
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from, to, cache->motd[i]); |
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sendto_one(source_p, form_str(RPL_ENDOFMOTD), from, to); |
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} |
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|
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/*! \brief Find the MOTD for a client and send it. |
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* \param client_p Client being greeted. |
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*/ |
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void |
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motd_send(struct Client *client_p) |
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{ |
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assert(client_p); |
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|
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motd_forward(client_p, motd_cache(motd_lookup(client_p))); |
| 313 |
} |
| 314 |
|
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/*! \brief Send the signon MOTD to a user. |
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* If FEAT_NODEFAULTMOTD is true and a matching MOTD exists for the |
| 317 |
* user, direct the client to type /MOTD to read it. Otherwise, call |
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* motd_forward() for the user. |
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* \param source_p Client that has just connected. |
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*/ |
| 321 |
void |
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motd_signon(struct Client *source_p) |
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{ |
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const struct MotdCache *cache = motd_cache(motd_lookup(source_p)); |
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|
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if (!ConfigFileEntry.short_motd || !cache) |
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motd_forward(source_p, cache); |
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else |
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{ |
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sendto_one(source_p, ":%s NOTICE %s :*** Notice -- motd was last changed at %d/%d/%d %d:%02d", |
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me.name, source_p->name, cache->modtime.tm_year + 1900, |
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cache->modtime.tm_mon + 1, |
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cache->modtime.tm_mday, |
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cache->modtime.tm_hour, |
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cache->modtime.tm_min); |
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sendto_one(source_p, |
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":%s NOTICE %s :*** Notice -- Please read the motd if you haven't " |
| 338 |
"read it", me.name, source_p->name); |
| 339 |
sendto_one(source_p, form_str(RPL_MOTDSTART), |
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me.name, source_p->name, me.name); |
| 341 |
sendto_one(source_p, form_str(RPL_MOTD), |
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me.name, source_p->name, |
| 343 |
"*** This is the short motd ***"); |
| 344 |
sendto_one(source_p, form_str(RPL_ENDOFMOTD), |
| 345 |
me.name, source_p->name); |
| 346 |
} |
| 347 |
} |
| 348 |
|
| 349 |
/*! \brief Clear all cached MOTD bodies. |
| 350 |
* The local and remote MOTDs are re-cached immediately. |
| 351 |
*/ |
| 352 |
void |
| 353 |
motd_recache(void) |
| 354 |
{ |
| 355 |
dlink_node *ptr = NULL; |
| 356 |
|
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motd_decache(MotdList.local); /* decache local and remote MOTDs */ |
| 358 |
motd_decache(MotdList.remote); |
| 359 |
|
| 360 |
DLINK_FOREACH(ptr, MotdList.other.head) /* now all the others */ |
| 361 |
motd_decache(ptr->data); |
| 362 |
|
| 363 |
/* now recache local and remote MOTDs */ |
| 364 |
motd_cache(MotdList.local); |
| 365 |
motd_cache(MotdList.remote); |
| 366 |
} |
| 367 |
|
| 368 |
/*! \brief Re-cache the local and remote MOTDs. |
| 369 |
* If they already exist, they are deallocated first. |
| 370 |
*/ |
| 371 |
void |
| 372 |
motd_init(void) |
| 373 |
{ |
| 374 |
if (MotdList.local) /* destroy old local... */ |
| 375 |
motd_destroy(MotdList.local); |
| 376 |
|
| 377 |
MotdList.local = motd_create(0, MPATH); |
| 378 |
motd_cache(MotdList.local); /* init local and cache it */ |
| 379 |
|
| 380 |
if (MotdList.remote) /* destroy old remote... */ |
| 381 |
motd_destroy(MotdList.remote); |
| 382 |
|
| 383 |
MotdList.remote = motd_create(0, MPATH); |
| 384 |
motd_cache(MotdList.remote); /* init remote and cache it */ |
| 385 |
} |
| 386 |
|
| 387 |
/* \brief Add a new MOTD. |
| 388 |
* \param hostmask Hostmask (or connection class name) to send this to. |
| 389 |
* \param path Pathname of file to send. |
| 390 |
*/ |
| 391 |
void |
| 392 |
motd_add(const char *hostmask, const char *path) |
| 393 |
{ |
| 394 |
struct Motd *motd = motd_create(hostmask, path); /* create the motd */ |
| 395 |
|
| 396 |
dlinkAdd(motd, &motd->node, &MotdList.other); |
| 397 |
} |
| 398 |
|
| 399 |
/*! \brief Clear out all MOTDs. |
| 400 |
* Compared to motd_recache(), this destroys all hostmask- or |
| 401 |
* class-based MOTDs rather than simply uncaching them. |
| 402 |
* Re-cache the local and remote MOTDs. |
| 403 |
*/ |
| 404 |
void |
| 405 |
motd_clear(void) |
| 406 |
{ |
| 407 |
dlink_node *ptr = NULL, *ptr_next = NULL; |
| 408 |
|
| 409 |
motd_decache(MotdList.local); /* decache local and remote MOTDs */ |
| 410 |
motd_decache(MotdList.remote); |
| 411 |
|
| 412 |
DLINK_FOREACH_SAFE(ptr, ptr_next, MotdList.other.head) /* destroy other MOTDs */ |
| 413 |
motd_destroy(ptr->data); |
| 414 |
|
| 415 |
/* now recache local and remote MOTDs */ |
| 416 |
motd_cache(MotdList.local); |
| 417 |
motd_cache(MotdList.remote); |
| 418 |
} |
| 419 |
|
| 420 |
/*! \brief Report list of non-default MOTDs. |
| 421 |
* \param source_p Client requesting statistics. |
| 422 |
*/ |
| 423 |
void |
| 424 |
motd_report(struct Client *source_p) |
| 425 |
{ |
| 426 |
const dlink_node *ptr = NULL; |
| 427 |
|
| 428 |
DLINK_FOREACH(ptr, MotdList.other.head) |
| 429 |
{ |
| 430 |
const struct Motd *motd = ptr->data; |
| 431 |
|
| 432 |
sendto_one(source_p, form_str(RPL_STATSTLINE), |
| 433 |
me.name, source_p->name, |
| 434 |
motd->hostmask, motd->path); |
| 435 |
} |
| 436 |
} |
| 437 |
|
| 438 |
/*! \brief Report MOTD memory usage to a client. |
| 439 |
* \param source_p Client requesting memory usage. |
| 440 |
*/ |
| 441 |
void |
| 442 |
motd_memory_count(struct Client *source_p) |
| 443 |
{ |
| 444 |
const dlink_node *ptr = NULL; |
| 445 |
unsigned int mt = 0; /* motd count */ |
| 446 |
unsigned int mtc = 0; /* motd cache count */ |
| 447 |
size_t mtm = 0; /* memory consumed by motd */ |
| 448 |
size_t mtcm = 0; /* memory consumed by motd cache */ |
| 449 |
|
| 450 |
if (MotdList.local) |
| 451 |
{ |
| 452 |
mt++; |
| 453 |
mtm += sizeof(struct Motd); |
| 454 |
mtm += MotdList.local->path ? (strlen(MotdList.local->path) + 1) : 0; |
| 455 |
} |
| 456 |
|
| 457 |
if (MotdList.remote) |
| 458 |
{ |
| 459 |
mt++; |
| 460 |
mtm += sizeof(struct Motd); |
| 461 |
mtm += MotdList.remote->path ? (strlen(MotdList.remote->path) + 1) : 0; |
| 462 |
} |
| 463 |
|
| 464 |
DLINK_FOREACH(ptr, MotdList.other.head) |
| 465 |
{ |
| 466 |
const struct MotdCache *motd = ptr->data; |
| 467 |
|
| 468 |
mt++; |
| 469 |
mtm += sizeof(struct Motd); |
| 470 |
mtm += motd->path ? (strlen(motd->path) + 1) : 0; |
| 471 |
} |
| 472 |
|
| 473 |
DLINK_FOREACH(ptr, MotdList.cachelist.head) |
| 474 |
{ |
| 475 |
const struct MotdCache *cache = ptr->data; |
| 476 |
|
| 477 |
mtc++; |
| 478 |
mtcm += sizeof(struct MotdCache) + (MOTD_LINESIZE * (cache->count - 1)); |
| 479 |
} |
| 480 |
|
| 481 |
sendto_one(source_p, ":%s %d %s z :Motds %u(%u) Cache %u(%u)", |
| 482 |
me.name, RPL_STATSDEBUG, source_p->name, |
| 483 |
mt, mtm, mtc, mtcm); |
| 484 |
} |
