trunk/src/motd.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 2000 Kevin L. Mitchell <klmitch@mit.edu>
 *  Copyright (c) 2013-2016 ircd-hybrid development team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 *  USA
 */

/*! \file motd.c
 * \brief Message-of-the-day manipulation implementation.
 * \version $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "ircd.h"
#include "conf.h"
#include "send.h"
#include "numeric.h"
#include "client.h"
#include "irc_string.h"
#include "memory.h"
#include "log.h"
#include "motd.h"
#include "hostmask.h"
#include "misc.h"


/** Global list of messages of the day. */
static struct
{
  struct Motd *local;    /**< Local MOTD. */
  struct Motd *remote;   /**< Remote MOTD. */
  dlink_list other;      /**< MOTDs specified in configuration file. */
  dlink_list cachelist;  /**< List of MotdCache entries. */
} MotdList;


/*! \brief Create a struct Motd and initialize it.
 * \param mask Hostmask (or connection class name) to filter on.
 * \param path Path to MOTD file.
 */
static struct Motd *
motd_create(const char *mask, const char *path)
{
  struct Motd *motd = xcalloc(sizeof(struct Motd));

  if (EmptyString(mask))
    motd->type = MOTD_UNIVERSAL;
  else if (class_find(mask, 1))
    motd->type = MOTD_CLASS;
  else
  {
    switch (parse_netmask(mask, &motd->address, &motd->addrbits))
    {
      case HM_IPV4:
        motd->type = MOTD_IPMASKV4;
        break;
      case HM_IPV6:
        motd->type = MOTD_IPMASKV6;
        break;
      default:  /* HM_HOST */
        motd->type = MOTD_HOSTMASK;
        break;
    }
  }

  if (mask)
    motd->mask = xstrdup(mask);

  motd->path = xstrdup(path);
  motd->maxcount = MOTD_MAXLINES;

  return motd;
}

/*! brief\ This function reads a motd out of a file (if needed) and caches it.
 * If a matching cache entry already exists, reuse it. Otherwise,
 * allocate and populate a new MotdCache for it.
 * \param motd Specification for MOTD file.
 * \return Matching MotdCache entry.
 */
static struct MotdCache *
motd_cache(struct Motd *motd)
{
  FILE *file = NULL;
  struct MotdCache *cache = NULL;
  struct stat sb;
  char line[MOTD_LINESIZE + 2];  /* +2 for \r\n */
  char *tmp = NULL;
  unsigned int i = 0;
  dlink_node *node = NULL;

  assert(motd);
  assert(motd->path);

  if (motd->cache)
    return motd->cache;

  /* Try to find it in the list of cached files */
  DLINK_FOREACH(node, MotdList.cachelist.head)
  {
    cache = node->data;

    if (!strcmp(cache->path, motd->path) && cache->maxcount == motd->maxcount)
    {
      cache->ref++;  /* Increase reference count */
      motd->cache = cache;  /* Remember cache */
      return motd->cache;  /* Return it */
    }
  }

  /* Need the file's modification time */
  if (stat(motd->path, &sb) == -1)
  {
    ilog(LOG_TYPE_IRCD, "Couldn't stat \"%s\": %s", motd->path,
         strerror(errno));
    return 0;
  }

  /* Gotta read in the file, now */
  if ((file = fopen(motd->path, "r")) == NULL)
  {
    ilog(LOG_TYPE_IRCD, "Couldn't open \"%s\": %s", motd->path,
         strerror(errno));
    return 0;
  }

  /* Ok, allocate a structure; we'll realloc later to trim memory */
  cache = xcalloc(sizeof(struct MotdCache) + (MOTD_LINESIZE * MOTD_MAXLINES));
  cache->ref = 1;
  cache->path = xstrdup(motd->path);
  cache->maxcount = motd->maxcount;
  cache->modtime = sb.st_mtime;  /* Store modtime */

  while (cache->count < cache->maxcount && fgets(line, sizeof(line), file))
  {
    /* Copy over line, stopping when we overflow or hit line end */
    for (tmp = line, i = 0; i < (MOTD_LINESIZE - 1) && *tmp && *tmp != '\r' && *tmp != '\n'; ++tmp, ++i)
      cache->motd[cache->count][i] = *tmp;
    cache->motd[cache->count][i] = '\0';

    cache->count++;
  }

  fclose(file);  /* Close the file */

  /* Trim memory usage a little */
  motd->cache = xcalloc(sizeof(struct MotdCache) +
                         (MOTD_LINESIZE * cache->count));
  memcpy(motd->cache, cache, sizeof(struct MotdCache) +
         (MOTD_LINESIZE * cache->count));
  xfree(cache);

  /* Now link it in */
  dlinkAdd(motd->cache, &motd->cache->node, &MotdList.cachelist);

  return motd->cache;
}

/*! \brief Clear and dereference the Motd::cache element of \a motd.
 * If the MotdCache::ref count goes to zero, free it.
 * \param motd MOTD to uncache.
 */
static void
motd_decache(struct Motd *motd)
{
  struct MotdCache *cache = NULL;

  assert(motd);

  if ((cache = motd->cache) == NULL)  /* We can be called for records with no cache */
    return;

  motd->cache = NULL;  /* Zero the cache */

  if (--cache->ref == 0)  /* Reduce reference count */
  {
    dlinkDelete(&cache->node, &MotdList.cachelist);
    xfree(cache->path);  /* Free path info */
    xfree(cache);  /* Very simple for a reason */
  }
}

/*! \brief Deallocate a MOTD structure.
 * If it has cached content, uncache it.
 * \param motd MOTD to destroy.
 */
static void
motd_destroy(struct Motd *motd)
{
  assert(motd);

  if (motd->cache)  /* Drop the cache */
    motd_decache(motd);

  xfree(motd->path);  /* We always must have a path */
  xfree(motd->mask);
  xfree(motd);
}

/*! \brief Find the first matching MOTD block for a user.
 * If the user is remote, always use remote MOTD.
 * Otherwise, if there is a hostmask- or class-based MOTD that matches
 * the user, use it.
 * Otherwise, use the local MOTD.
 * \param client_p Client to find MOTD for.
 * \return Pointer to first matching MOTD for the client.
 */
static struct Motd *
motd_lookup(const struct Client *client_p)
{
  dlink_node *node = NULL;
  const struct ClassItem *class = NULL;

  assert(client_p);

  if (!MyConnect(client_p))  /* Not my user, always return remote motd */
    return MotdList.remote;

  class = get_class_ptr(&client_p->connection->confs);
  assert(class);

  /* Check the motd blocks first */
  DLINK_FOREACH(node, MotdList.other.head)
  {
    struct Motd *motd = node->data;

    switch (motd->type)
    {
      case MOTD_CLASS:
        if (!match(motd->mask, class->name))
          return motd;
        break;
      case MOTD_HOSTMASK:
        if (!match(motd->mask, client_p->host) || !match(motd->mask, client_p->sockhost))
          return motd;
        break;
      case MOTD_IPMASKV4:
          if (client_p->connection->aftype == AF_INET)
            if (match_ipv4(&client_p->connection->ip, &motd->address, motd->addrbits))
              return motd;
        break;
      case MOTD_IPMASKV6:
          if (client_p->connection->aftype == AF_INET6)
            if (match_ipv6(&client_p->connection->ip, &motd->address, motd->addrbits))
              return motd;
        break;
      default: break;
    }
  }

  return MotdList.local;  /* Ok, return the default motd */
}

/*! \brief Send the content of a MotdCache to a user.
 * If \a cache is NULL, simply send ERR_NOMOTD to the client.
 * \param client_p Client to send MOTD to.
 * \param cache MOTD body to send to client.
 */
static void
motd_forward(struct Client *client_p, const struct MotdCache *cache)
{
  if (!cache)  /* No motd to send */
  {
    sendto_one_numeric(client_p, &me, ERR_NOMOTD);
    return;
  }

  /* Send the motd */
  sendto_one_numeric(client_p, &me, RPL_MOTDSTART, me.name);

  for (unsigned int i = 0; i < cache->count; ++i)
    sendto_one_numeric(client_p, &me, RPL_MOTD, cache->motd[i]);

  sendto_one_numeric(client_p, &me, RPL_ENDOFMOTD);
}

/*! \brief Find the MOTD for a client and send it.
 * \param client_p Client being greeted.
 */
void
motd_send(struct Client *client_p)
{
  assert(client_p);

  motd_forward(client_p, motd_cache(motd_lookup(client_p)));
}

/*! \brief Send the signon MOTD to a user.
 * If general::short_motd is true and a matching MOTD exists for the
 * user, direct the client to type /MOTD to read it. Otherwise, call
 * motd_forward() for the user.
 * \param client_p Client that has just connected.
 */
void
motd_signon(struct Client *client_p)
{
  const struct MotdCache *cache = motd_cache(motd_lookup(client_p));

  if (!ConfigGeneral.short_motd || !cache)
    motd_forward(client_p, cache);
  else
  {
    sendto_one_notice(client_p, &me, ":*** Notice -- motd was last changed at %s",
                      date_iso8601(cache->modtime));
    sendto_one_notice(client_p, &me, ":*** Notice -- Please read the motd if you haven't read it");
    sendto_one_numeric(client_p, &me, RPL_MOTDSTART, me.name);
    sendto_one_numeric(client_p, &me, RPL_MOTD, "*** This is the short motd ***");
    sendto_one_numeric(client_p, &me, RPL_ENDOFMOTD);
  }
}

/*! \brief Clear all cached MOTD bodies.
 * The local and remote MOTDs are re-cached immediately.
 */
void
motd_recache(void)
{
  dlink_node *node = NULL;

  motd_decache(MotdList.local);  /* Decache local and remote MOTDs */
  motd_decache(MotdList.remote);

  DLINK_FOREACH(node, MotdList.other.head)  /* Now all the others */
    motd_decache(node->data);

  /* Now recache local and remote MOTDs */
  motd_cache(MotdList.local);
  motd_cache(MotdList.remote);
}

/*! \brief Re-cache the local and remote MOTDs.
 * If they already exist, they are deallocated first.
 */
void
motd_init(void)
{
  if (MotdList.local)  /* Destroy old local MOTD */
    motd_destroy(MotdList.local);

  MotdList.local = motd_create(NULL, MPATH);
  motd_cache(MotdList.local);  /* Initialize local MOTD and cache it */

  if (MotdList.remote)  /* Destroy old remote MOTD */
    motd_destroy(MotdList.remote);

  MotdList.remote = motd_create(NULL, MPATH);
  motd_cache(MotdList.remote);  /* Initialize remote MOTD and cache it */
}

/* \brief Add a new MOTD.
 * \param mask Hostmask (or connection class name) to send this to.
 * \param path Pathname of file to send.
 */
void
motd_add(const char *mask, const char *path)
{
  struct Motd *motd = motd_create(mask, path);  /* Create the motd */

  dlinkAdd(motd, &motd->node, &MotdList.other);
}

/*! \brief Clear out all MOTDs.
 * Compared to motd_recache(), this destroys all hostmask- or
 * class-based MOTDs rather than simply uncaching them.
 * Re-cache the local and remote MOTDs.
 */
void
motd_clear(void)
{
  dlink_node *node = NULL, *node_next = NULL;

  motd_decache(MotdList.local);  /* Decache local and remote MOTDs */
  motd_decache(MotdList.remote);

  DLINK_FOREACH_SAFE(node, node_next, MotdList.other.head)  /* Destroy other MOTDs */
  {
    dlinkDelete(node, &MotdList.other);
    motd_destroy(node->data);
  }

  /* Now recache local and remote MOTDs */
  motd_cache(MotdList.local);
  motd_cache(MotdList.remote);
}

/*! \brief Report list of non-default MOTDs.
 * \param client_p Client requesting statistics.
 */
void
motd_report(struct Client *client_p, int parc, char *parv[])
{
  const dlink_node *node = NULL;

  DLINK_FOREACH(node, MotdList.other.head)
  {
    const struct Motd *motd = node->data;

    sendto_one_numeric(client_p, &me, RPL_STATSTLINE,
                       motd->mask, motd->path);
  }
}

/*! \brief Report MOTD memory usage to a client.
 * \param client_p Client requesting memory usage.
 */
void
motd_memory_count(struct Client *client_p)
{
  const dlink_node *node = NULL;
  unsigned int mt  = 0;  /* Motd count */
  unsigned int mtc = 0;  /* Motd cache count */
  size_t mtm  = 0;  /* Memory consumed by motd */
  size_t mtcm = 0;  /* Memory consumed by motd cache */

  if (MotdList.local)
  {
    ++mt;
    mtm += sizeof(struct Motd);
    mtm += MotdList.local->path ? (strlen(MotdList.local->path) + 1) : 0;
  }

  if (MotdList.remote)
  {
    ++mt;
    mtm += sizeof(struct Motd);
    mtm += MotdList.remote->path ? (strlen(MotdList.remote->path) + 1) : 0;
  }

  DLINK_FOREACH(node, MotdList.other.head)
  {
    const struct Motd *motd = node->data;

    ++mt;
    mtm += sizeof(struct Motd);
    mtm += motd->path ? (strlen(motd->path) + 1) : 0;
  }

  DLINK_FOREACH(node, MotdList.cachelist.head)
  {
    const struct MotdCache *cache = node->data;

    ++mtc;
    mtcm += sizeof(struct MotdCache) + (MOTD_LINESIZE * (cache->count - 1));
  }

  sendto_one_numeric(client_p, &me, RPL_STATSDEBUG | SND_EXPLICIT,
                     "z :Motds %u(%zu) Cache %u(%zu)",
                     mt, mtm, mtc, mtcm);
}
Revision:	7032
Committed:	Sun Jan 3 14:34:39 2016 UTC (9 years, 7 months ago) by michael
Content type:	text/x-csrc
File size:	12808 byte(s)
Log Message:	- Renamed MyCalloc to xcalloc
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 2000 Kevin L. Mitchell <klmitch@mit.edu>
5	* Copyright (c) 2013-2016 ircd-hybrid development team
6	*
7	* This program is free software; you can redistribute it and/or modify
8	* it under the terms of the GNU General Public License as published by
9	* the Free Software Foundation; either version 2 of the License, or
10	* (at your option) any later version.
11	*
12	* This program is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	* GNU General Public License for more details.
16	*
17	* You should have received a copy of the GNU General Public License
18	* along with this program; if not, write to the Free Software
19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
20	* USA
21	*/
22
23	/*! \file motd.c
24	* \brief Message-of-the-day manipulation implementation.
25	* \version $Id$
26	*/
27
28	#include "stdinc.h"
29	#include "list.h"
30	#include "ircd.h"
31	#include "conf.h"
32	#include "send.h"
33	#include "numeric.h"
34	#include "client.h"
35	#include "irc_string.h"
36	#include "memory.h"
37	#include "log.h"
38	#include "motd.h"
39	#include "hostmask.h"
40	#include "misc.h"
41
42
43	/** Global list of messages of the day. */
44	static struct
45	{
46	struct Motd local; /< Local MOTD. /
47	struct Motd remote; /< Remote MOTD. /
48	dlink_list other; /*< MOTDs specified in configuration file. /
49	dlink_list cachelist; /*< List of MotdCache entries. /
50	} MotdList;
51
52
53	/*! \brief Create a struct Motd and initialize it.
54	* \param mask Hostmask (or connection class name) to filter on.
55	* \param path Path to MOTD file.
56	*/
57	static struct Motd *
58	motd_create(const char mask, const char path)
59	{
60	struct Motd *motd = xcalloc(sizeof(struct Motd));
61
62	if (EmptyString(mask))
63	motd->type = MOTD_UNIVERSAL;
64	else if (class_find(mask, 1))
65	motd->type = MOTD_CLASS;
66	else
67	{
68	switch (parse_netmask(mask, &motd->address, &motd->addrbits))
69	{
70	case HM_IPV4:
71	motd->type = MOTD_IPMASKV4;
72	break;
73	case HM_IPV6:
74	motd->type = MOTD_IPMASKV6;
75	break;
76	default: /* HM_HOST */
77	motd->type = MOTD_HOSTMASK;
78	break;
79	}
80	}
81
82	if (mask)
83	motd->mask = xstrdup(mask);
84
85	motd->path = xstrdup(path);
86	motd->maxcount = MOTD_MAXLINES;
87
88	return motd;
89	}
90
91	/*! brief\ This function reads a motd out of a file (if needed) and caches it.
92	* If a matching cache entry already exists, reuse it. Otherwise,
93	* allocate and populate a new MotdCache for it.
94	* \param motd Specification for MOTD file.
95	* \return Matching MotdCache entry.
96	*/
97	static struct MotdCache *
98	motd_cache(struct Motd *motd)
99	{
100	FILE *file = NULL;
101	struct MotdCache *cache = NULL;
102	struct stat sb;
103	char line[MOTD_LINESIZE + 2]; /* +2 for \r\n */
104	char *tmp = NULL;
105	unsigned int i = 0;
106	dlink_node *node = NULL;
107
108	assert(motd);
109	assert(motd->path);
110
111	if (motd->cache)
112	return motd->cache;
113
114	/* Try to find it in the list of cached files */
115	DLINK_FOREACH(node, MotdList.cachelist.head)
116	{
117	cache = node->data;
118
119	if (!strcmp(cache->path, motd->path) && cache->maxcount == motd->maxcount)
120	{
121	cache->ref++; /* Increase reference count */
122	motd->cache = cache; /* Remember cache */
123	return motd->cache; /* Return it */
124	}
125	}
126
127	/* Need the file's modification time */
128	if (stat(motd->path, &sb) == -1)
129	{
130	ilog(LOG_TYPE_IRCD, "Couldn't stat \"%s\": %s", motd->path,
131	strerror(errno));
132	return 0;
133	}
134
135	/* Gotta read in the file, now */
136	if ((file = fopen(motd->path, "r")) == NULL)
137	{
138	ilog(LOG_TYPE_IRCD, "Couldn't open \"%s\": %s", motd->path,
139	strerror(errno));
140	return 0;
141	}
142
143	/* Ok, allocate a structure; we'll realloc later to trim memory */
144	cache = xcalloc(sizeof(struct MotdCache) + (MOTD_LINESIZE * MOTD_MAXLINES));
145	cache->ref = 1;
146	cache->path = xstrdup(motd->path);
147	cache->maxcount = motd->maxcount;
148	cache->modtime = sb.st_mtime; /* Store modtime */
149
150	while (cache->count < cache->maxcount && fgets(line, sizeof(line), file))
151	{
152	/* Copy over line, stopping when we overflow or hit line end */
153	for (tmp = line, i = 0; i < (MOTD_LINESIZE - 1) && tmp && tmp != '\r' && *tmp != '\n'; ++tmp, ++i)
154	cache->motd[cache->count][i] = *tmp;
155	cache->motd[cache->count][i] = '\0';
156
157	cache->count++;
158	}
159
160	fclose(file); /* Close the file */
161
162	/* Trim memory usage a little */
163	motd->cache = xcalloc(sizeof(struct MotdCache) +
164	(MOTD_LINESIZE * cache->count));
165	memcpy(motd->cache, cache, sizeof(struct MotdCache) +
166	(MOTD_LINESIZE * cache->count));
167	xfree(cache);
168
169	/* Now link it in */
170	dlinkAdd(motd->cache, &motd->cache->node, &MotdList.cachelist);
171
172	return motd->cache;
173	}
174
175	/*! \brief Clear and dereference the Motd::cache element of \a motd.
176	* If the MotdCache::ref count goes to zero, free it.
177	* \param motd MOTD to uncache.
178	*/
179	static void
180	motd_decache(struct Motd *motd)
181	{
182	struct MotdCache *cache = NULL;
183
184	assert(motd);
185
186	if ((cache = motd->cache) == NULL) /* We can be called for records with no cache */
187	return;
188
189	motd->cache = NULL; /* Zero the cache */
190
191	if (--cache->ref == 0) /* Reduce reference count */
192	{
193	dlinkDelete(&cache->node, &MotdList.cachelist);
194	xfree(cache->path); /* Free path info */
195	xfree(cache); /* Very simple for a reason */
196	}
197	}
198
199	/*! \brief Deallocate a MOTD structure.
200	* If it has cached content, uncache it.
201	* \param motd MOTD to destroy.
202	*/
203	static void
204	motd_destroy(struct Motd *motd)
205	{
206	assert(motd);
207
208	if (motd->cache) /* Drop the cache */
209	motd_decache(motd);
210
211	xfree(motd->path); /* We always must have a path */
212	xfree(motd->mask);
213	xfree(motd);
214	}
215
216	/*! \brief Find the first matching MOTD block for a user.
217	* If the user is remote, always use remote MOTD.
218	* Otherwise, if there is a hostmask- or class-based MOTD that matches
219	* the user, use it.
220	* Otherwise, use the local MOTD.
221	* \param client_p Client to find MOTD for.
222	* \return Pointer to first matching MOTD for the client.
223	*/
224	static struct Motd *
225	motd_lookup(const struct Client *client_p)
226	{
227	dlink_node *node = NULL;
228	const struct ClassItem *class = NULL;
229
230	assert(client_p);
231
232	if (!MyConnect(client_p)) /* Not my user, always return remote motd */
233	return MotdList.remote;
234
235	class = get_class_ptr(&client_p->connection->confs);
236	assert(class);
237
238	/* Check the motd blocks first */
239	DLINK_FOREACH(node, MotdList.other.head)
240	{
241	struct Motd *motd = node->data;
242
243	switch (motd->type)
244	{
245	case MOTD_CLASS:
246	if (!match(motd->mask, class->name))
247	return motd;
248	break;
249	case MOTD_HOSTMASK:
250	if (!match(motd->mask, client_p->host) \|\| !match(motd->mask, client_p->sockhost))
251	return motd;
252	break;
253	case MOTD_IPMASKV4:
254	if (client_p->connection->aftype == AF_INET)
255	if (match_ipv4(&client_p->connection->ip, &motd->address, motd->addrbits))
256	return motd;
257	break;
258	case MOTD_IPMASKV6:
259	if (client_p->connection->aftype == AF_INET6)
260	if (match_ipv6(&client_p->connection->ip, &motd->address, motd->addrbits))
261	return motd;
262	break;
263	default: break;
264	}
265	}
266
267	return MotdList.local; /* Ok, return the default motd */
268	}
269
270	/*! \brief Send the content of a MotdCache to a user.
271	* If \a cache is NULL, simply send ERR_NOMOTD to the client.
272	* \param client_p Client to send MOTD to.
273	* \param cache MOTD body to send to client.
274	*/
275	static void
276	motd_forward(struct Client client_p, const struct MotdCache cache)
277	{
278	if (!cache) /* No motd to send */
279	{
280	sendto_one_numeric(client_p, &me, ERR_NOMOTD);
281	return;
282	}
283
284	/* Send the motd */
285	sendto_one_numeric(client_p, &me, RPL_MOTDSTART, me.name);
286
287	for (unsigned int i = 0; i < cache->count; ++i)
288	sendto_one_numeric(client_p, &me, RPL_MOTD, cache->motd[i]);
289
290	sendto_one_numeric(client_p, &me, RPL_ENDOFMOTD);
291	}
292
293	/*! \brief Find the MOTD for a client and send it.
294	* \param client_p Client being greeted.
295	*/
296	void
297	motd_send(struct Client *client_p)
298	{
299	assert(client_p);
300
301	motd_forward(client_p, motd_cache(motd_lookup(client_p)));
302	}
303
304	/*! \brief Send the signon MOTD to a user.
305	* If general::short_motd is true and a matching MOTD exists for the
306	* user, direct the client to type /MOTD to read it. Otherwise, call
307	* motd_forward() for the user.
308	* \param client_p Client that has just connected.
309	*/
310	void
311	motd_signon(struct Client *client_p)
312	{
313	const struct MotdCache *cache = motd_cache(motd_lookup(client_p));
314
315	if (!ConfigGeneral.short_motd \|\| !cache)
316	motd_forward(client_p, cache);
317	else
318	{
319	sendto_one_notice(client_p, &me, ":*** Notice -- motd was last changed at %s",
320	date_iso8601(cache->modtime));
321	sendto_one_notice(client_p, &me, ":*** Notice -- Please read the motd if you haven't read it");
322	sendto_one_numeric(client_p, &me, RPL_MOTDSTART, me.name);
323	sendto_one_numeric(client_p, &me, RPL_MOTD, "* This is the short motd *");
324	sendto_one_numeric(client_p, &me, RPL_ENDOFMOTD);
325	}
326	}
327
328	/*! \brief Clear all cached MOTD bodies.
329	* The local and remote MOTDs are re-cached immediately.
330	*/
331	void
332	motd_recache(void)
333	{
334	dlink_node *node = NULL;
335
336	motd_decache(MotdList.local); /* Decache local and remote MOTDs */
337	motd_decache(MotdList.remote);
338
339	DLINK_FOREACH(node, MotdList.other.head) /* Now all the others */
340	motd_decache(node->data);
341
342	/* Now recache local and remote MOTDs */
343	motd_cache(MotdList.local);
344	motd_cache(MotdList.remote);
345	}
346
347	/*! \brief Re-cache the local and remote MOTDs.
348	* If they already exist, they are deallocated first.
349	*/
350	void
351	motd_init(void)
352	{
353	if (MotdList.local) /* Destroy old local MOTD */
354	motd_destroy(MotdList.local);
355
356	MotdList.local = motd_create(NULL, MPATH);
357	motd_cache(MotdList.local); /* Initialize local MOTD and cache it */
358
359	if (MotdList.remote) /* Destroy old remote MOTD */
360	motd_destroy(MotdList.remote);
361
362	MotdList.remote = motd_create(NULL, MPATH);
363	motd_cache(MotdList.remote); /* Initialize remote MOTD and cache it */
364	}
365
366	/* \brief Add a new MOTD.
367	* \param mask Hostmask (or connection class name) to send this to.
368	* \param path Pathname of file to send.
369	*/
370	void
371	motd_add(const char mask, const char path)
372	{
373	struct Motd motd = motd_create(mask, path); / Create the motd */
374
375	dlinkAdd(motd, &motd->node, &MotdList.other);
376	}
377
378	/*! \brief Clear out all MOTDs.
379	* Compared to motd_recache(), this destroys all hostmask- or
380	* class-based MOTDs rather than simply uncaching them.
381	* Re-cache the local and remote MOTDs.
382	*/
383	void
384	motd_clear(void)
385	{
386	dlink_node node = NULL, node_next = NULL;
387
388	motd_decache(MotdList.local); /* Decache local and remote MOTDs */
389	motd_decache(MotdList.remote);
390
391	DLINK_FOREACH_SAFE(node, node_next, MotdList.other.head) /* Destroy other MOTDs */
392	{
393	dlinkDelete(node, &MotdList.other);
394	motd_destroy(node->data);
395	}
396
397	/* Now recache local and remote MOTDs */
398	motd_cache(MotdList.local);
399	motd_cache(MotdList.remote);
400	}
401
402	/*! \brief Report list of non-default MOTDs.
403	* \param client_p Client requesting statistics.
404	*/
405	void
406	motd_report(struct Client client_p, int parc, char parv[])
407	{
408	const dlink_node *node = NULL;
409
410	DLINK_FOREACH(node, MotdList.other.head)
411	{
412	const struct Motd *motd = node->data;
413
414	sendto_one_numeric(client_p, &me, RPL_STATSTLINE,
415	motd->mask, motd->path);
416	}
417	}
418
419	/*! \brief Report MOTD memory usage to a client.
420	* \param client_p Client requesting memory usage.
421	*/
422	void
423	motd_memory_count(struct Client *client_p)
424	{
425	const dlink_node *node = NULL;
426	unsigned int mt = 0; /* Motd count */
427	unsigned int mtc = 0; /* Motd cache count */
428	size_t mtm = 0; /* Memory consumed by motd */
429	size_t mtcm = 0; /* Memory consumed by motd cache */
430
431	if (MotdList.local)
432	{
433	++mt;
434	mtm += sizeof(struct Motd);
435	mtm += MotdList.local->path ? (strlen(MotdList.local->path) + 1) : 0;
436	}
437
438	if (MotdList.remote)
439	{
440	++mt;
441	mtm += sizeof(struct Motd);
442	mtm += MotdList.remote->path ? (strlen(MotdList.remote->path) + 1) : 0;
443	}
444
445	DLINK_FOREACH(node, MotdList.other.head)
446	{
447	const struct Motd *motd = node->data;
448
449	++mt;
450	mtm += sizeof(struct Motd);
451	mtm += motd->path ? (strlen(motd->path) + 1) : 0;
452	}
453
454	DLINK_FOREACH(node, MotdList.cachelist.head)
455	{
456	const struct MotdCache *cache = node->data;
457
458	++mtc;
459	mtcm += sizeof(struct MotdCache) + (MOTD_LINESIZE * (cache->count - 1));
460	}
461
462	sendto_one_numeric(client_p, &me, RPL_STATSDEBUG \| SND_EXPLICIT,
463	"z :Motds %u(%zu) Cache %u(%zu)",
464	mt, mtm, mtc, mtcm);
465	}