8.1.x/modules/m_help.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_help.c: Provides help information to a user/operator.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  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
 *
 *  $Id$
 */

#include "stdinc.h"
#include "handlers.h"
#include "client.h"
#include "ircd.h"
#include "ircd_handler.h"
#include "msg.h"
#include "numeric.h"
#include "send.h"
#include "s_conf.h"
#include "s_log.h"
#include "parse.h"
#include "modules.h"
#include "irc_string.h"

#define HELPLEN 400

static void m_help(struct Client *, struct Client *, int, char *[]);
static void mo_help(struct Client *, struct Client *, int, char *[]);
static void mo_uhelp(struct Client *, struct Client *, int, char *[]);
static void dohelp(struct Client *, const char *, char *);
static void sendhelpfile(struct Client *, const char *, const char *);

struct Message help_msgtab = {
  "HELP", 0, 0, 0, 0, MFLG_SLOW, 0,
  {m_unregistered, m_help, m_ignore, m_ignore, mo_help, m_ignore}
};

struct Message uhelp_msgtab = {
  "UHELP", 0, 0, 0, 0, MFLG_SLOW, 0,
  {m_unregistered, m_help, m_ignore, m_ignore, mo_uhelp, m_ignore}
};

#ifndef STATIC_MODULES
void
_modinit(void)
{
  mod_add_cmd(&help_msgtab);
  mod_add_cmd(&uhelp_msgtab);
}

void
_moddeinit(void)
{
  mod_del_cmd(&help_msgtab);
  mod_del_cmd(&uhelp_msgtab);
}

const char *_version = "$Revision$";
#endif

/*
 * m_help - HELP message handler
 *      parv[0] = sender prefix
 */
static void
m_help(struct Client *client_p, struct Client *source_p,
       int parc, char *parv[])
{
  static time_t last_used = 0;

  /* HELP is always local */
  if ((last_used + ConfigFileEntry.pace_wait_simple) > CurrentTime)
  {
    /* safe enough to give this on a local connect only */
    sendto_one(source_p,form_str(RPL_LOAD2HI),
               me.name, source_p->name);
    return;
  }

  last_used = CurrentTime;

  dohelp(source_p, UHPATH, parv[1]);
}

/*
 * mo_help - HELP message handler
 *      parv[0] = sender prefix
 */
static void
mo_help(struct Client *client_p, struct Client *source_p,
        int parc, char *parv[])
{
  dohelp(source_p, HPATH, parv[1]);
}

/*
 * mo_uhelp - HELP message handler
 * This is used so that opers can view the user help file without deopering
 *      parv[0] = sender prefix
 */
static void
mo_uhelp(struct Client *client_p, struct Client *source_p,
            int parc, char *parv[])
{
  dohelp(source_p, UHPATH, parv[1]);
}

static void
dohelp(struct Client *source_p, const char *hpath, char *topic)
{
  char h_index[] = "index";
  char path[PATH_MAX + 1];
  struct stat sb;
  int i;

  if (topic != NULL)
  {
    if (*topic == '\0')
      topic = h_index;
    else
    {
      /* convert to lower case */
      for (i = 0; topic[i] != '\0'; ++i)
        topic[i] = ToLower(topic[i]);
    }
  }
  else
    topic = h_index;    /* list available help topics */

  if (strpbrk(topic, "/\\"))
  {
    sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
               me.name, source_p->name, topic);
    return;
  }

  if (strlen(hpath) + strlen(topic) + 1 > PATH_MAX)
  {
    sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
               me.name, source_p->name, topic);
    return;
  }

  snprintf(path, sizeof(path), "%s/%s", hpath, topic);

  if (stat(path, &sb) < 0)
  {
    sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
               me.name, source_p->name, topic);
    return;
  }

  if (!S_ISREG(sb.st_mode))
  {
    sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
               me.name, source_p->name, topic);
    return;
  }

  sendhelpfile(source_p, path, topic);
}

static void 
sendhelpfile(struct Client *source_p, const char *path, const char *topic)
{
  FBFILE *file;
  char line[HELPLEN];
  char started = 0;
  int type;

  if ((file = fbopen(path, "r")) == NULL)
  {
    sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
               me.name, source_p->name, topic);
    return;
  }

  if (fbgets(line, sizeof(line), file) == NULL)
  {
    sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
               me.name, source_p->name, topic);
    return;
  }

  else if (line[0] != '#')
  {
    line[strlen(line) - 1] = '\0';        
    sendto_one(source_p, form_str(RPL_HELPSTART),
             me.name, source_p->name, topic, line);
    started = 1;
  }

  while (fbgets(line, sizeof(line), file))
  {
    line[strlen(line) - 1] = '\0';
    if (line[0] != '#')
    {
      if (!started)
      {
        type = RPL_HELPSTART;
        started = 1;
      }
      else
        type = RPL_HELPTXT;
      
      sendto_one(source_p, form_str(RPL_HELPTXT),
                 me.name, source_p->name, topic, line);
    }
  }

  fbclose(file);
  sendto_one(source_p, form_str(RPL_HELPTXT),
             me.name, source_p->name, topic, "");
  sendto_one(source_p, form_str(RPL_ENDOFHELP),
             me.name, source_p->name, topic);
}
Revision:	1055
Committed:	Thu Jan 28 09:03:31 2010 UTC (16 years, 8 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-7.3/modules/m_help.c*
File size:	5562 byte(s)
Log Message:	- m_help.c: logging unfound help-topics that are triggered by simple HELP requests is just stupid, as this can be easily abused.
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* m_help.c: Provides help information to a user/operator.
4			*
5			* Copyright (C) 2002 by the past and present ircd coders, and others.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*
22	knight	31	* $Id$
23	adx	30	*/
24
25			#include "stdinc.h"
26			#include "handlers.h"
27			#include "client.h"
28			#include "ircd.h"
29			#include "ircd_handler.h"
30			#include "msg.h"
31			#include "numeric.h"
32			#include "send.h"
33			#include "s_conf.h"
34			#include "s_log.h"
35			#include "parse.h"
36			#include "modules.h"
37			#include "irc_string.h"
38
39			#define HELPLEN 400
40
41			static void m_help(struct Client , struct Client , int, char *[]);
42			static void mo_help(struct Client , struct Client , int, char *[]);
43			static void mo_uhelp(struct Client , struct Client , int, char *[]);
44			static void dohelp(struct Client , const char , char *);
45			static void sendhelpfile(struct Client , const char , const char *);
46
47			struct Message help_msgtab = {
48			"HELP", 0, 0, 0, 0, MFLG_SLOW, 0,
49			{m_unregistered, m_help, m_ignore, m_ignore, mo_help, m_ignore}
50			};
51
52			struct Message uhelp_msgtab = {
53			"UHELP", 0, 0, 0, 0, MFLG_SLOW, 0,
54			{m_unregistered, m_help, m_ignore, m_ignore, mo_uhelp, m_ignore}
55			};
56
57			#ifndef STATIC_MODULES
58			void
59			_modinit(void)
60			{
61			mod_add_cmd(&help_msgtab);
62			mod_add_cmd(&uhelp_msgtab);
63			}
64
65			void
66			_moddeinit(void)
67			{
68			mod_del_cmd(&help_msgtab);
69			mod_del_cmd(&uhelp_msgtab);
70			}
71
72	knight	31	const char *_version = "$Revision$";
73	adx	30	#endif
74
75			/*
76			* m_help - HELP message handler
77			* parv[0] = sender prefix
78			*/
79			static void
80			m_help(struct Client client_p, struct Client source_p,
81			int parc, char *parv[])
82			{
83			static time_t last_used = 0;
84
85			/* HELP is always local */
86			if ((last_used + ConfigFileEntry.pace_wait_simple) > CurrentTime)
87			{
88			/* safe enough to give this on a local connect only */
89			sendto_one(source_p,form_str(RPL_LOAD2HI),
90			me.name, source_p->name);
91			return;
92			}
93
94			last_used = CurrentTime;
95
96			dohelp(source_p, UHPATH, parv[1]);
97			}
98
99			/*
100			* mo_help - HELP message handler
101			* parv[0] = sender prefix
102			*/
103			static void
104			mo_help(struct Client client_p, struct Client source_p,
105			int parc, char *parv[])
106			{
107			dohelp(source_p, HPATH, parv[1]);
108			}
109
110			/*
111			* mo_uhelp - HELP message handler
112			* This is used so that opers can view the user help file without deopering
113			* parv[0] = sender prefix
114			*/
115			static void
116			mo_uhelp(struct Client client_p, struct Client source_p,
117			int parc, char *parv[])
118			{
119			dohelp(source_p, UHPATH, parv[1]);
120			}
121
122			static void
123			dohelp(struct Client source_p, const char hpath, char *topic)
124			{
125	michael	575	char h_index[] = "index";
126	adx	30	char path[PATH_MAX + 1];
127			struct stat sb;
128			int i;
129
130			if (topic != NULL)
131			{
132			if (*topic == '\0')
133	michael	575	topic = h_index;
134	adx	30	else
135			{
136			/* convert to lower case */
137	michael	575	for (i = 0; topic[i] != '\0'; ++i)
138	adx	30	topic[i] = ToLower(topic[i]);
139			}
140			}
141			else
142	michael	575	topic = h_index; /* list available help topics */
143	adx	30
144			if (strpbrk(topic, "/\\"))
145			{
146			sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
147			me.name, source_p->name, topic);
148			return;
149			}
150
151			if (strlen(hpath) + strlen(topic) + 1 > PATH_MAX)
152			{
153			sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
154			me.name, source_p->name, topic);
155			return;
156			}
157
158			snprintf(path, sizeof(path), "%s/%s", hpath, topic);
159
160			if (stat(path, &sb) < 0)
161			{
162			sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
163			me.name, source_p->name, topic);
164			return;
165			}
166
167			if (!S_ISREG(sb.st_mode))
168			{
169			sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
170			me.name, source_p->name, topic);
171			return;
172			}
173
174			sendhelpfile(source_p, path, topic);
175			}
176
177			static void
178			sendhelpfile(struct Client source_p, const char path, const char *topic)
179			{
180			FBFILE *file;
181			char line[HELPLEN];
182			char started = 0;
183			int type;
184
185			if ((file = fbopen(path, "r")) == NULL)
186			{
187			sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
188			me.name, source_p->name, topic);
189			return;
190			}
191
192			if (fbgets(line, sizeof(line), file) == NULL)
193			{
194			sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
195			me.name, source_p->name, topic);
196			return;
197			}
198
199			else if (line[0] != '#')
200			{
201			line[strlen(line) - 1] = '\0';
202			sendto_one(source_p, form_str(RPL_HELPSTART),
203			me.name, source_p->name, topic, line);
204			started = 1;
205			}
206
207			while (fbgets(line, sizeof(line), file))
208			{
209			line[strlen(line) - 1] = '\0';
210	michael	1055	if (line[0] != '#')
211	adx	30	{
212			if (!started)
213			{
214			type = RPL_HELPSTART;
215	michael	1055	started = 1;
216	adx	30	}
217			else
218			type = RPL_HELPTXT;
219
220			sendto_one(source_p, form_str(RPL_HELPTXT),
221			me.name, source_p->name, topic, line);
222			}
223			}
224
225			fbclose(file);
226			sendto_one(source_p, form_str(RPL_HELPTXT),
227			me.name, source_p->name, topic, "");
228			sendto_one(source_p, form_str(RPL_ENDOFHELP),
229			me.name, source_p->name, topic);
230			}