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) 2013-2014 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  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 "s_serv.h"
#include "numeric.h"
#include "client.h"
#include "irc_string.h"
#include "memory.h"
#include "log.h"
#include "motd.h"
#include "hostmask.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 hostmask Hostmask (or connection class name) to filter on.
 * \param path Path to MOTD file.
 */
static struct Motd *
motd_create(const char *hostmask, const char *path)
{
  struct Motd *tmp = MyMalloc(sizeof(struct Motd));

  if (EmptyString(hostmask))
    tmp->type = MOTD_UNIVERSAL;
  else if (class_find(hostmask, 1))
    tmp->type = MOTD_CLASS;
  else
  {
    switch (parse_netmask(hostmask, &tmp->address, &tmp->addrbits))
    {
      case HM_IPV4:
      tmp->type = MOTD_IPMASKV4;
      break;
#ifdef IPV6
    case HM_IPV6:
      tmp->type = MOTD_IPMASKV6;
      break;
#endif
    default: /* HM_HOST */
      tmp->type = MOTD_HOSTMASK;
      break;
    }
  }

  if (hostmask)
    tmp->hostmask = xstrdup(hostmask);

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

  return tmp;
}

/*! 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]; /* \r\n */
  char *tmp = NULL;
  unsigned int i = 0;
  dlink_node *ptr = NULL;

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

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

  /* try to find it in the list of cached files... */
  DLINK_FOREACH(ptr, MotdList.cachelist.head)
  {
    cache = ptr->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 = MyMalloc(sizeof(struct MotdCache) + (MOTD_LINESIZE * MOTD_MAXLINES));
  cache->ref = 1;
  cache->path = xstrdup(motd->path);
  cache->maxcount = motd->maxcount;
  cache->modtime = *localtime((time_t *)&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 = MyMalloc(sizeof(struct MotdCache) +
                         (MOTD_LINESIZE * cache->count));
  memcpy(motd->cache, cache, sizeof(struct MotdCache) +
         (MOTD_LINESIZE * cache->count));
  MyFree(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);
    MyFree(cache->path); /* free path info... */
    MyFree(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);

  MyFree(motd->path);  /* we always must have a path */
  MyFree(motd->hostmask);
  MyFree(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 *ptr = NULL;
  const struct ClassItem *class = NULL;

  assert(client_p);

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

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

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

    switch (motd->type)
    {
      case MOTD_CLASS:
        if (!match(motd->hostmask, class->name))
          return motd;
        break;
      case MOTD_HOSTMASK:
        if (!match(motd->hostmask, client_p->host))
          return motd;
        break;
      case MOTD_IPMASKV4:
          if (client_p->localClient->aftype == AF_INET)
            if (match_ipv4(&client_p->localClient->ip, &motd->address, motd->addrbits))
              return motd;
        break;
#ifdef IPV6
      case MOTD_IPMASKV6:
          if (client_p->localClient->aftype == AF_INET6)
            if (match_ipv6(&client_p->localClient->ip, &motd->address, motd->addrbits))
              return motd;
        break;
#endif
      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 source_p Client to send MOTD to.
 * \param cache MOTD body to send to client.
 */
static void
motd_forward(struct Client *source_p, const struct MotdCache *cache)
{
  if (!cache)  /* no motd to send */
  {
    sendto_one_numeric(source_p, &me, ERR_NOMOTD);
    return;
  }

  /* send the motd */
  sendto_one_numeric(source_p, &me, RPL_MOTDSTART, me.name);

  for (unsigned int i = 0; i < cache->count; ++i)
    sendto_one_numeric(source_p, &me, RPL_MOTD, cache->motd[i]);
  sendto_one_numeric(source_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 FEAT_NODEFAULTMOTD 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 source_p Client that has just connected.
 */
void
motd_signon(struct Client *source_p)
{
  const struct MotdCache *cache = motd_cache(motd_lookup(source_p));

  if (!ConfigFileEntry.short_motd || !cache)
    motd_forward(source_p, cache);
  else
  {
    sendto_one_notice(source_p, &me, ":*** Notice -- motd was last changed at %d/%d/%d %d:%02d",
                      cache->modtime.tm_year + 1900,
                      cache->modtime.tm_mon + 1,
                      cache->modtime.tm_mday,
                      cache->modtime.tm_hour,
                      cache->modtime.tm_min);
    sendto_one_notice(source_p, &me, ":*** Notice -- Please read the motd if you haven't read it");
    sendto_one_numeric(source_p, &me, RPL_MOTDSTART, me.name);
    sendto_one_numeric(source_p, &me, RPL_MOTD,
                       "*** This is the short motd ***");
    sendto_one_numeric(source_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 *ptr = NULL;

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

  DLINK_FOREACH(ptr, MotdList.other.head)  /* now all the others */
    motd_decache(ptr->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_destroy(MotdList.local);

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

  if (MotdList.remote)  /* destroy old remote... */
    motd_destroy(MotdList.remote);

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

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

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

  DLINK_FOREACH_SAFE(ptr, ptr_next, MotdList.other.head)  /* destroy other MOTDs */
  {
    dlinkDelete(ptr, &MotdList.other);
    motd_destroy(ptr->data);
  }

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

/*! \brief Report list of non-default MOTDs.
 * \param source_p Client requesting statistics.
 */
void
motd_report(struct Client *source_p)
{
  const dlink_node *ptr = NULL;

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

    sendto_one_numeric(source_p, &me, RPL_STATSTLINE,
                       motd->hostmask, motd->path);
  }
}

/*! \brief Report MOTD memory usage to a client.
 * \param source_p Client requesting memory usage.
 */
void
motd_memory_count(struct Client *source_p)
{
  const dlink_node *ptr = 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(ptr, MotdList.other.head)
  {
    const struct Motd *motd = ptr->data;

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

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

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

  sendto_one(source_p, ":%s %d %s z :Motds %u(%u) Cache %u(%u)",
             me.name, RPL_STATSDEBUG, source_p->name,
             mt, mtm, mtc, mtcm);
}
Revision:	3235
Committed:	Sat Mar 29 19:34:16 2014 UTC (11 years, 4 months ago) by michael
Content type:	text/x-csrc
File size:	13014 byte(s)
Log Message:	- Style corrections all over the place
#	User	Rev	Content
1	adx	30	/*
2	michael	2916	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	2916	* Copyright (c) 2000 Kevin L. Mitchell <klmitch@mit.edu>
5			* Copyright (c) 2013-2014 ircd-hybrid development team
6	adx	30	*
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*/
22
23	michael	2150	/*! \file motd.c
24			* \brief Message-of-the-day manipulation implementation.
25			* \version $Id$
26			*/
27
28	adx	30	#include "stdinc.h"
29	michael	1011	#include "list.h"
30	adx	30	#include "ircd.h"
31	michael	1309	#include "conf.h"
32	adx	30	#include "send.h"
33	michael	2150	#include "s_serv.h"
34	adx	30	#include "numeric.h"
35			#include "client.h"
36			#include "irc_string.h"
37			#include "memory.h"
38	michael	2150	#include "log.h"
39			#include "motd.h"
40	michael	2167	#include "hostmask.h"
41	adx	30
42	michael	2150
43			/** Global list of messages of the day. */
44			static struct
45	adx	30	{
46	michael	2150	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 hostmask 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 hostmask, const char path)
59			{
60			struct Motd *tmp = MyMalloc(sizeof(struct Motd));
61
62			if (EmptyString(hostmask))
63			tmp->type = MOTD_UNIVERSAL;
64			else if (class_find(hostmask, 1))
65			tmp->type = MOTD_CLASS;
66			else
67	michael	2167	{
68			switch (parse_netmask(hostmask, &tmp->address, &tmp->addrbits))
69			{
70			case HM_IPV4:
71			tmp->type = MOTD_IPMASKV4;
72			break;
73			#ifdef IPV6
74			case HM_IPV6:
75			tmp->type = MOTD_IPMASKV6;
76			break;
77			#endif
78			default: /* HM_HOST */
79			tmp->type = MOTD_HOSTMASK;
80			break;
81			}
82			}
83	michael	2150
84	michael	3235	if (hostmask)
85	michael	2150	tmp->hostmask = xstrdup(hostmask);
86
87			tmp->path = xstrdup(path);
88			tmp->maxcount = MOTD_MAXLINES;
89
90			return tmp;
91	adx	30	}
92
93	michael	2150	/*! brief\ This function reads a motd out of a file (if needed) and caches it.
94			* If a matching cache entry already exists, reuse it. Otherwise,
95			* allocate and populate a new MotdCache for it.
96			* \param motd Specification for MOTD file.
97			* \return Matching MotdCache entry.
98			*/
99			static struct MotdCache *
100			motd_cache(struct Motd *motd)
101	adx	30	{
102	michael	2150	FILE *file = NULL;
103			struct MotdCache *cache = NULL;
104			struct stat sb;
105			char line[MOTD_LINESIZE + 2]; /* \r\n */
106	michael	2194	char *tmp = NULL;
107	michael	2164	unsigned int i = 0;
108	michael	2150	dlink_node *ptr = NULL;
109	adx	30
110	michael	2150	assert(motd);
111			assert(motd->path);
112	adx	30
113	michael	2150	if (motd->cache)
114			return motd->cache;
115	adx	30
116	michael	2150	/* try to find it in the list of cached files... */
117			DLINK_FOREACH(ptr, MotdList.cachelist.head)
118			{
119			cache = ptr->data;
120	adx	30
121	michael	2150	if (!strcmp(cache->path, motd->path) && cache->maxcount == motd->maxcount)
122			{
123			cache->ref++; /* increase reference count... */
124			motd->cache = cache; /* remember cache... */
125			return motd->cache; /* return it */
126			}
127			}
128
129	michael	2190	/* need the file's modification time */
130			if (stat(motd->path, &sb) == -1)
131	adx	30	{
132	michael	2190	ilog(LOG_TYPE_IRCD, "Couldn't stat \"%s\": %s", motd->path,
133	michael	2150	strerror(errno));
134			return 0;
135			}
136	adx	30
137	michael	2190	/* gotta read in the file, now */
138			if ((file = fopen(motd->path, "r")) == NULL)
139	michael	2150	{
140	michael	2190	ilog(LOG_TYPE_IRCD, "Couldn't open \"%s\": %s", motd->path,
141			strerror(errno));
142	michael	2150	return 0;
143			}
144	adx	30
145	michael	2150	/* Ok, allocate a structure; we'll realloc later to trim memory */
146	michael	2410	cache = MyMalloc(sizeof(struct MotdCache) + (MOTD_LINESIZE * MOTD_MAXLINES));
147	michael	2150	cache->ref = 1;
148			cache->path = xstrdup(motd->path);
149			cache->maxcount = motd->maxcount;
150			cache->modtime = localtime((time_t )&sb.st_mtime); /* store modtime */
151	adx	30
152	michael	2150	while (cache->count < cache->maxcount && fgets(line, sizeof(line), file))
153			{
154			/* copy over line, stopping when we overflow or hit line end */
155	michael	2194	for (tmp = line, i = 0; i < (MOTD_LINESIZE - 1) && tmp && tmp != '\r' && *tmp != '\n'; ++tmp, ++i)
156	michael	2150	cache->motd[cache->count][i] = *tmp;
157			cache->motd[cache->count][i] = '\0';
158	adx	30
159	michael	2150	cache->count++;
160	adx	30	}
161
162	michael	2150	fclose(file); /* close the file */
163
164			/* trim memory usage a little */
165			motd->cache = MyMalloc(sizeof(struct MotdCache) +
166	michael	2410	(MOTD_LINESIZE * cache->count));
167	michael	2150	memcpy(motd->cache, cache, sizeof(struct MotdCache) +
168	michael	2410	(MOTD_LINESIZE * cache->count));
169	michael	2150	MyFree(cache);
170
171			/* now link it in... */
172			dlinkAdd(motd->cache, &motd->cache->node, &MotdList.cachelist);
173
174			return motd->cache;
175	adx	30	}
176
177	michael	2150	/*! \brief Clear and dereference the Motd::cache element of \a motd.
178			* If the MotdCache::ref count goes to zero, free it.
179			* \param motd MOTD to uncache.
180	adx	30	*/
181	michael	2150	static void
182			motd_decache(struct Motd *motd)
183	adx	30	{
184	michael	2150	struct MotdCache *cache = NULL;
185	adx	30
186	michael	2150	assert(motd);
187	adx	30
188	michael	2150	if ((cache = motd->cache) == NULL) /* we can be called for records with no cache */
189			return;
190	adx	30
191	michael	2150	motd->cache = NULL; /* zero the cache */
192	adx	30
193	michael	2164	if (--cache->ref == 0) /* reduce reference count... */
194	adx	30	{
195	michael	2150	dlinkDelete(&cache->node, &MotdList.cachelist);
196			MyFree(cache->path); /* free path info... */
197			MyFree(cache); /* very simple for a reason... */
198	adx	30	}
199	michael	2150	}
200	adx	30
201	michael	2150	/*! \brief Deallocate a MOTD structure.
202			* If it has cached content, uncache it.
203			* \param motd MOTD to destroy.
204			*/
205			static void
206			motd_destroy(struct Motd *motd)
207			{
208			assert(motd);
209	adx	30
210	michael	2150	if (motd->cache) /* drop the cache */
211			motd_decache(motd);
212	adx	30
213	michael	2150	MyFree(motd->path); /* we always must have a path */
214			MyFree(motd->hostmask);
215			MyFree(motd);
216			}
217	adx	30
218	michael	2150	/*! \brief Find the first matching MOTD block for a user.
219			* If the user is remote, always use remote MOTD.
220			* Otherwise, if there is a hostmask- or class-based MOTD that matches
221			* the user, use it.
222			* Otherwise, use the local MOTD.
223			* \param client_p Client to find MOTD for.
224			* \return Pointer to first matching MOTD for the client.
225			*/
226			static struct Motd *
227	michael	2874	motd_lookup(const struct Client *client_p)
228	michael	2150	{
229			dlink_node *ptr = NULL;
230			const struct ClassItem *class = NULL;
231	adx	30
232	michael	2150	assert(client_p);
233	adx	30
234	michael	2150	if (!MyClient(client_p)) /* not my user, always return remote motd */
235			return MotdList.remote;
236	adx	30
237	michael	2150	class = get_class_ptr(&client_p->localClient->confs);
238			assert(class);
239	adx	30
240	michael	2150	/* check the motd blocks first */
241			DLINK_FOREACH(ptr, MotdList.other.head)
242			{
243			struct Motd *motd = ptr->data;
244	adx	30
245	michael	2150	switch (motd->type)
246	adx	30	{
247	michael	2150	case MOTD_CLASS:
248			if (!match(motd->hostmask, class->name))
249			return motd;
250	michael	2167	break;
251	michael	2150	case MOTD_HOSTMASK:
252			if (!match(motd->hostmask, client_p->host))
253			return motd;
254	michael	2167	break;
255			case MOTD_IPMASKV4:
256			if (client_p->localClient->aftype == AF_INET)
257			if (match_ipv4(&client_p->localClient->ip, &motd->address, motd->addrbits))
258			return motd;
259			break;
260	michael	2168	#ifdef IPV6
261	michael	2167	case MOTD_IPMASKV6:
262			if (client_p->localClient->aftype == AF_INET6)
263			if (match_ipv6(&client_p->localClient->ip, &motd->address, motd->addrbits))
264			return motd;
265			break;
266	michael	2168	#endif
267	michael	2150	default: break;
268	adx	30	}
269			}
270
271	michael	2150	return MotdList.local; /* Ok, return the default motd */
272	adx	30	}
273
274	michael	2150	/*! \brief Send the content of a MotdCache to a user.
275			* If \a cache is NULL, simply send ERR_NOMOTD to the client.
276			* \param source_p Client to send MOTD to.
277			* \param cache MOTD body to send to client.
278	adx	30	*/
279	michael	2150	static void
280			motd_forward(struct Client source_p, const struct MotdCache cache)
281			{
282			if (!cache) /* no motd to send */
283			{
284	michael	3109	sendto_one_numeric(source_p, &me, ERR_NOMOTD);
285	michael	2150	return;
286			}
287
288			/* send the motd */
289	michael	3109	sendto_one_numeric(source_p, &me, RPL_MOTDSTART, me.name);
290	michael	2150
291	michael	3235	for (unsigned int i = 0; i < cache->count; ++i)
292	michael	3109	sendto_one_numeric(source_p, &me, RPL_MOTD, cache->motd[i]);
293			sendto_one_numeric(source_p, &me, RPL_ENDOFMOTD);
294	michael	2150	}
295
296			/*! \brief Find the MOTD for a client and send it.
297			* \param client_p Client being greeted.
298			*/
299			void
300			motd_send(struct Client *client_p)
301	adx	30	{
302	michael	2150	assert(client_p);
303	adx	30
304	michael	2150	motd_forward(client_p, motd_cache(motd_lookup(client_p)));
305	adx	30	}
306
307	michael	2150	/*! \brief Send the signon MOTD to a user.
308			* If FEAT_NODEFAULTMOTD is true and a matching MOTD exists for the
309			* user, direct the client to type /MOTD to read it. Otherwise, call
310			* motd_forward() for the user.
311			* \param source_p Client that has just connected.
312	adx	30	*/
313			void
314	michael	2150	motd_signon(struct Client *source_p)
315	adx	30	{
316	michael	2150	const struct MotdCache *cache = motd_cache(motd_lookup(source_p));
317	adx	30
318	michael	2150	if (!ConfigFileEntry.short_motd \|\| !cache)
319			motd_forward(source_p, cache);
320			else
321	adx	30	{
322	michael	3110	sendto_one_notice(source_p, &me, ":*** Notice -- motd was last changed at %d/%d/%d %d:%02d",
323			cache->modtime.tm_year + 1900,
324			cache->modtime.tm_mon + 1,
325			cache->modtime.tm_mday,
326			cache->modtime.tm_hour,
327			cache->modtime.tm_min);
328			sendto_one_notice(source_p, &me, ":*** Notice -- Please read the motd if you haven't read it");
329	michael	3109	sendto_one_numeric(source_p, &me, RPL_MOTDSTART, me.name);
330			sendto_one_numeric(source_p, &me, RPL_MOTD,
331			"* This is the short motd *");
332			sendto_one_numeric(source_p, &me, RPL_ENDOFMOTD);
333	adx	30	}
334	michael	2150	}
335
336			/*! \brief Clear all cached MOTD bodies.
337			* The local and remote MOTDs are re-cached immediately.
338			*/
339			void
340			motd_recache(void)
341			{
342			dlink_node *ptr = NULL;
343
344			motd_decache(MotdList.local); /* decache local and remote MOTDs */
345			motd_decache(MotdList.remote);
346
347			DLINK_FOREACH(ptr, MotdList.other.head) /* now all the others */
348			motd_decache(ptr->data);
349
350			/* now recache local and remote MOTDs */
351			motd_cache(MotdList.local);
352			motd_cache(MotdList.remote);
353			}
354
355			/*! \brief Re-cache the local and remote MOTDs.
356			* If they already exist, they are deallocated first.
357			*/
358			void
359			motd_init(void)
360			{
361			if (MotdList.local) /* destroy old local... */
362			motd_destroy(MotdList.local);
363
364	michael	2203	MotdList.local = motd_create(NULL, MPATH);
365	michael	2150	motd_cache(MotdList.local); /* init local and cache it */
366
367			if (MotdList.remote) /* destroy old remote... */
368			motd_destroy(MotdList.remote);
369
370	michael	2203	MotdList.remote = motd_create(NULL, MPATH);
371	michael	2150	motd_cache(MotdList.remote); /* init remote and cache it */
372			}
373
374			/* \brief Add a new MOTD.
375			* \param hostmask Hostmask (or connection class name) to send this to.
376			* \param path Pathname of file to send.
377			*/
378			void
379			motd_add(const char hostmask, const char path)
380			{
381			struct Motd motd = motd_create(hostmask, path); / create the motd */
382
383			dlinkAdd(motd, &motd->node, &MotdList.other);
384			}
385
386			/*! \brief Clear out all MOTDs.
387			* Compared to motd_recache(), this destroys all hostmask- or
388			* class-based MOTDs rather than simply uncaching them.
389			* Re-cache the local and remote MOTDs.
390			*/
391			void
392			motd_clear(void)
393			{
394			dlink_node ptr = NULL, ptr_next = NULL;
395
396			motd_decache(MotdList.local); /* decache local and remote MOTDs */
397			motd_decache(MotdList.remote);
398
399			DLINK_FOREACH_SAFE(ptr, ptr_next, MotdList.other.head) /* destroy other MOTDs */
400	michael	2193	{
401			dlinkDelete(ptr, &MotdList.other);
402	michael	2150	motd_destroy(ptr->data);
403	michael	2193	}
404	michael	2150
405			/* now recache local and remote MOTDs */
406			motd_cache(MotdList.local);
407			motd_cache(MotdList.remote);
408			}
409
410			/*! \brief Report list of non-default MOTDs.
411			* \param source_p Client requesting statistics.
412			*/
413			void
414			motd_report(struct Client *source_p)
415			{
416			const dlink_node *ptr = NULL;
417
418			DLINK_FOREACH(ptr, MotdList.other.head)
419	adx	30	{
420	michael	2150	const struct Motd *motd = ptr->data;
421
422	michael	3109	sendto_one_numeric(source_p, &me, RPL_STATSTLINE,
423			motd->hostmask, motd->path);
424	adx	30	}
425			}
426
427	michael	2150	/*! \brief Report MOTD memory usage to a client.
428			* \param source_p Client requesting memory usage.
429	adx	30	*/
430			void
431	michael	2150	motd_memory_count(struct Client *source_p)
432	adx	30	{
433	michael	2150	const dlink_node *ptr = NULL;
434			unsigned int mt = 0; /* motd count */
435			unsigned int mtc = 0; /* motd cache count */
436			size_t mtm = 0; /* memory consumed by motd */
437			size_t mtcm = 0; /* memory consumed by motd cache */
438	adx	30
439	michael	2150	if (MotdList.local)
440			{
441			mt++;
442			mtm += sizeof(struct Motd);
443			mtm += MotdList.local->path ? (strlen(MotdList.local->path) + 1) : 0;
444			}
445	adx	30
446	michael	2150	if (MotdList.remote)
447	adx	30	{
448	michael	2150	mt++;
449			mtm += sizeof(struct Motd);
450			mtm += MotdList.remote->path ? (strlen(MotdList.remote->path) + 1) : 0;
451			}
452
453			DLINK_FOREACH(ptr, MotdList.other.head)
454			{
455	michael	2320	const struct Motd *motd = ptr->data;
456	michael	2150
457			mt++;
458			mtm += sizeof(struct Motd);
459			mtm += motd->path ? (strlen(motd->path) + 1) : 0;
460			}
461
462			DLINK_FOREACH(ptr, MotdList.cachelist.head)
463			{
464			const struct MotdCache *cache = ptr->data;
465
466			mtc++;
467			mtcm += sizeof(struct MotdCache) + (MOTD_LINESIZE * (cache->count - 1));
468			}
469
470			sendto_one(source_p, ":%s %d %s z :Motds %u(%u) Cache %u(%u)",
471			me.name, RPL_STATSDEBUG, source_p->name,
472			mt, mtm, mtc, mtcm);
473	adx	30	}