--- /dev/null
+/*
+ * IRC - Internet Relay Chat, ircd/motd.c
+ * Copyright (C) 1990 Jarkko Oikarinen and
+ * University of Oulu, Computing Center
+ * Copyright (C) 2000 Kevin L. Mitchell <klmitch@mit.edu>
+ *
+ * See file AUTHORS in IRC package for additional names of
+ * the programmers.
+ *
+ * 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 1, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/** @file
+ * @brief Message-of-the-day manipulation implementation.
+ * @version $Id$
+ */
+#include "config.h"
+
+#include "motd.h"
+#include "class.h"
+#include "client.h"
+#include "fileio.h"
+#include "ircd.h"
+#include "ircd_alloc.h"
+#include "ircd_features.h"
+#include "ircd_log.h"
+#include "ircd_reply.h"
+#include "ircd_string.h"
+#include "match.h"
+#include "msg.h"
+#include "numeric.h"
+#include "numnicks.h"
+#include "s_conf.h"
+#include "s_debug.h"
+#include "s_user.h"
+#include "s_stats.h"
+#include "send.h"
+
+/* #include <assert.h> -- Now using assert in ircd_log.h */
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+
+/** Global list of messages of the day. */
+static struct {
+ struct Motd* local; /**< Local MOTD. */
+ struct Motd* remote; /**< Remote MOTD. */
+ struct Motd* other; /**< MOTDs specified in configuration file. */
+ struct Motd* freelist; /**< Currently unused Motd structs. */
+ struct MotdCache* cachelist; /**< List of MotdCache entries. */
+} MotdList = { 0, 0, 0, 0, 0 };
+
+/** Create a struct Motd and initialize it.
+ * @param[in] hostmask Hostmask (or connection class name) to filter on.
+ * @param[in] path Path to MOTD file.
+ * @param[in] maxcount Maximum number of lines permitted for MOTD.
+ */
+static struct Motd *
+motd_create(const char *hostmask, const char *path, int maxcount)
+{
+ struct Motd* tmp;
+
+ assert(0 != path);
+
+ /* allocate memory and initialize the structure */
+ if (MotdList.freelist)
+ {
+ tmp = MotdList.freelist;
+ MotdList.freelist = tmp->next;
+ } else
+ tmp = (struct Motd *)MyMalloc(sizeof(struct Motd));
+ tmp->next = 0;
+
+ if (hostmask == NULL)
+ tmp->type = MOTD_UNIVERSAL;
+ else if (find_class(hostmask))
+ tmp->type = MOTD_CLASS;
+ else if (ipmask_parse(hostmask, &tmp->address, &tmp->addrbits))
+ tmp->type = MOTD_IPMASK;
+ else
+ tmp->type = MOTD_HOSTMASK;
+
+ if (hostmask != NULL)
+ DupString(tmp->hostmask, hostmask);
+ else
+ tmp->hostmask = NULL;
+
+ DupString(tmp->path, path);
+ tmp->maxcount = maxcount;
+ tmp->cache = 0;
+
+ return tmp;
+}
+
+/** 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[in] motd Specification for MOTD file.
+ * @return Matching MotdCache entry.
+ */
+static struct MotdCache *
+motd_cache(struct Motd *motd)
+{
+ FBFILE* file;
+ struct MotdCache* cache;
+ struct stat sb;
+ char line[MOTD_LINESIZE + 2]; /* \r\n */
+ char* tmp;
+ int i;
+
+ assert(0 != motd);
+ assert(0 != motd->path);
+
+ if (motd->cache)
+ return motd->cache;
+
+ /* try to find it in the list of cached files... */
+ for (cache = MotdList.cachelist; cache; cache = cache->next) {
+ if (!strcmp(cache->path, motd->path) &&
+ cache->maxcount == motd->maxcount) { /* found one... */
+ cache->ref++; /* increase reference count... */
+ motd->cache = cache; /* remember cache... */
+ return motd->cache; /* return it */
+ }
+ }
+
+ /* gotta read in the file, now */
+ if (!(file = fbopen(motd->path, "r"))) {
+ Debug((DEBUG_ERROR, "Couldn't open \"%s\": %s", motd->path,
+ strerror(errno)));
+ return 0;
+ }
+
+ /* need the file's modification time */
+ if (-1 == fbstat(&sb, file)) {
+ fbclose(file);
+ return 0;
+ }
+
+ /* Ok, allocate a structure; we'll realloc later to trim memory */
+ cache = (struct MotdCache *)MyMalloc(sizeof(struct MotdCache) +
+ (MOTD_LINESIZE * (MOTD_MAXLINES - 1)));
+
+ cache->ref = 1;
+ DupString(cache->path, motd->path);
+ cache->maxcount = motd->maxcount;
+
+ cache->modtime = *localtime((time_t *) &sb.st_mtime); /* store modtime */
+
+ cache->count = 0;
+ while (cache->count < cache->maxcount && fbgets(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++;
+ }
+
+ fbclose(file); /* close the file */
+
+ /* trim memory usage a little */
+ motd->cache = (struct MotdCache*)MyMalloc(sizeof(struct MotdCache) +
+ (MOTD_LINESIZE * (cache->count - 1)));
+ memcpy(motd->cache, cache, sizeof(struct MotdCache) +
+ (MOTD_LINESIZE * (cache->count - 1)));
+ MyFree(cache);
+
+ /* now link it in... */
+ motd->cache->next = MotdList.cachelist;
+ motd->cache->prev_p = &MotdList.cachelist;
+ if (MotdList.cachelist)
+ MotdList.cachelist->prev_p = &motd->cache->next;
+ MotdList.cachelist = motd->cache;
+
+ return motd->cache;
+}
+
+/** Clear and dereference the Motd::cache element of \a motd.
+ * If the MotdCache::ref count goes to zero, free it.
+ * @param[in] motd MOTD to uncache.
+ */
+static void
+motd_decache(struct Motd *motd)
+{
+ struct MotdCache* cache;
+
+ assert(0 != motd);
+
+ if (!(cache = motd->cache)) /* we can be called for records with no cache */
+ return;
+
+ motd->cache = 0; /* zero the cache */
+
+ if (!--cache->ref) { /* reduce reference count... */
+ if (cache->next) /* ref is 0, delink from list and free */
+ cache->next->prev_p = cache->prev_p;
+ *cache->prev_p = cache->next;
+
+ MyFree(cache->path); /* free path info... */
+
+ MyFree(cache); /* very simple for a reason... */
+ }
+}
+
+/** Deallocate a MOTD structure.
+ * If it has cached content, uncache it.
+ * @param[in] motd MOTD to destroy.
+ */
+static void
+motd_destroy(struct Motd *motd)
+{
+ assert(0 != motd);
+
+ MyFree(motd->path); /* we always must have a path */
+ MyFree(motd->hostmask);
+ if (motd->cache) /* drop the cache */
+ motd_decache(motd);
+
+ motd->next = MotdList.freelist;
+ MotdList.freelist = motd;
+}
+
+/** 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[in] cptr Client to find MOTD for.
+ * @return Pointer to first matching MOTD for the client.
+ */
+static struct Motd *
+motd_lookup(struct Client *cptr)
+{
+ struct Motd *ptr;
+ char *c_class = NULL;
+
+ assert(0 != cptr);
+
+ if (!MyUser(cptr)) /* not my user, always return remote motd */
+ return MotdList.remote;
+
+ c_class = get_client_class(cptr);
+ assert(c_class != NULL);
+
+ /* check the motd blocks first */
+ for (ptr = MotdList.other; ptr; ptr = ptr->next)
+ {
+ if (ptr->type == MOTD_CLASS
+ && !match(ptr->hostmask, c_class))
+ return ptr;
+ else if (ptr->type == MOTD_HOSTMASK
+ && !match(ptr->hostmask, cli_sockhost(cptr)))
+ return ptr;
+ else if (ptr->type == MOTD_IPMASK
+ && ipmask_check(&cli_ip(cptr), &ptr->address, ptr->addrbits))
+ return ptr;
+ }
+
+ return MotdList.local; /* Ok, return the default motd */
+}
+
+/** Send the content of a MotdCache to a user.
+ * If \a cache is NULL, simply send ERR_NOMOTD to the client.
+ * @param[in] cptr Client to send MOTD to.
+ * @param[in] cache MOTD body to send to client.
+ */
+static int
+motd_forward(struct Client *cptr, struct MotdCache *cache)
+{
+ int i;
+
+ assert(0 != cptr);
+
+ if (!cache) /* no motd to send */
+ return send_reply(cptr, ERR_NOMOTD);
+
+ /* send the motd */
+ send_reply(cptr, RPL_MOTDSTART, cli_name(&me));
+ send_reply(cptr, SND_EXPLICIT | RPL_MOTD, ":- %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);
+
+ for (i = 0; i < cache->count; i++)
+ send_reply(cptr, RPL_MOTD, cache->motd[i]);
+
+ return send_reply(cptr, RPL_ENDOFMOTD); /* end */
+}
+
+/** Find the MOTD for a client and send it.
+ * @param[in] cptr Client being greeted.
+ */
+int
+motd_send(struct Client* cptr)
+{
+ assert(0 != cptr);
+
+ return motd_forward(cptr, motd_cache(motd_lookup(cptr)));
+}
+
+/** 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[in] cptr Client that has just connected.
+ */
+void
+motd_signon(struct Client* cptr)
+{
+ struct MotdCache *cache;
+ const char *banner = NULL;
+
+ cache = motd_cache(motd_lookup(cptr));
+
+ if (!feature_bool(FEAT_NODEFAULTMOTD) || !cache)
+ motd_forward(cptr, cache);
+ else {
+ send_reply(cptr, RPL_MOTDSTART, cli_name(&me));
+ if ((banner = feature_str(FEAT_MOTD_BANNER)))
+ send_reply(cptr, SND_EXPLICIT | RPL_MOTD, ":%s", banner);
+ send_reply(cptr, SND_EXPLICIT | RPL_MOTD, ":\002Type /MOTD to read the "
+ "AUP before continuing using this service.\002");
+ send_reply(cptr, SND_EXPLICIT | RPL_MOTD, ":The message of the day was "
+ "last changed: %d-%d-%d %d:%d", cache->modtime.tm_year + 1900,
+ cache->modtime.tm_mon + 1, cache->modtime.tm_mday,
+ cache->modtime.tm_hour, cache->modtime.tm_min);
+ send_reply(cptr, RPL_ENDOFMOTD);
+ }
+}
+
+/** Clear all cached MOTD bodies.
+ * The local and remote MOTDs are re-cached immediately.
+ */
+void
+motd_recache(void)
+{
+ struct Motd* tmp;
+
+ motd_decache(MotdList.local); /* decache local and remote MOTDs */
+ motd_decache(MotdList.remote);
+
+ for (tmp = MotdList.other; tmp; tmp = tmp->next) /* now all the others */
+ motd_decache(tmp);
+
+ /* now recache local and remote MOTDs */
+ motd_cache(MotdList.local);
+ motd_cache(MotdList.remote);
+}
+
+/** 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(0, feature_str(FEAT_MPATH), MOTD_MAXLINES);
+ motd_cache(MotdList.local); /* init local and cache it */
+
+ if (MotdList.remote) /* destroy old remote... */
+ motd_destroy(MotdList.remote);
+
+ MotdList.remote = motd_create(0, feature_str(FEAT_RPATH), MOTD_MAXREMOTE);
+ motd_cache(MotdList.remote); /* init remote and cache it */
+}
+
+/** Add a new MOTD.
+ * @param[in] hostmask Hostmask (or connection class name) to send this to.
+ * @param[in] path Pathname of file to send.
+ */
+void
+motd_add(const char *hostmask, const char *path)
+{
+ struct Motd *tmp;
+
+ tmp = motd_create(hostmask, path, MOTD_MAXLINES); /* create the motd */
+
+ tmp->next = MotdList.other; /* link it into the list */
+ MotdList.other = tmp;
+}
+
+/** 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)
+{
+ struct Motd *ptr, *next;
+
+ motd_decache(MotdList.local); /* decache local and remote MOTDs */
+ motd_decache(MotdList.remote);
+
+ if (MotdList.other) /* destroy other MOTDs */
+ for (ptr = MotdList.other; ptr; ptr = next)
+ {
+ next = ptr->next;
+ motd_destroy(ptr);
+ }
+
+ MotdList.other = 0;
+
+ /* now recache local and remote MOTDs */
+ motd_cache(MotdList.local);
+ motd_cache(MotdList.remote);
+}
+
+/** Report list of non-default MOTDs.
+ * @param[in] to Client requesting statistics.
+ * @param[in] sd Stats descriptor for request (ignored).
+ * @param[in] param Extra parameter from user (ignored).
+ */
+void
+motd_report(struct Client *to, const struct StatDesc *sd, char *param)
+{
+ struct Motd *ptr;
+
+ for (ptr = MotdList.other; ptr; ptr = ptr->next)
+ send_reply(to, SND_EXPLICIT | RPL_STATSTLINE, "T %s %s",
+ ptr->hostmask, ptr->path);
+}
+
+/** Report MOTD memory usage to a client.
+ * @param[in] cptr Client requesting memory usage.
+ */
+void
+motd_memory_count(struct Client *cptr)
+{
+ struct Motd *ptr;
+ struct MotdCache *cache;
+ unsigned int mt = 0, /* motd count */
+ mtc = 0, /* motd cache count */
+ mtf = 0; /* motd free list count */
+ size_t mtm = 0, /* memory consumed by motd */
+ 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;
+ }
+
+ for (ptr = MotdList.other; ptr; ptr = ptr->next)
+ {
+ mt++;
+ mtm += sizeof(struct Motd);
+ mtm += ptr->path ? (strlen(ptr->path) + 1) : 0;
+ }
+
+ for (cache = MotdList.cachelist; cache; cache = cache->next)
+ {
+ mtc++;
+ mtcm += sizeof(struct MotdCache) + (MOTD_LINESIZE * (cache->count - 1));
+ }
+
+ if (MotdList.freelist)
+ for (ptr = MotdList.freelist; ptr; ptr = ptr->next)
+ mtf++;
+
+ send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
+ ":Motds %d(%zu) Cache %d(%zu) Free %d(%zu)",
+ mt, mtm, mtc, mtcm, mtf, (mtf * sizeof(struct Motd)));
+}
projects / ircu2.10.12-pk.git / blobdiff