trunk/modules/m_encap.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 2003-2020 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 m_encap.c
 * \brief Includes required functions for processing the ENCAP command.
 * \version $Id$
 */

#include "stdinc.h"
#include "client.h"
#include "parse.h"
#include "server_capab.h"
#include "send.h"
#include "modules.h"
#include "irc_string.h"


/*
 * ms_encap()
 *
 * inputs       - destination server, subcommand, parameters
 * output       - none
 * side effects - propagates subcommand to locally connected servers
 */
static void
ms_encap(struct Client *source_p, int parc, char *parv[])
{
  char buffer[IRCD_BUFSIZE] = "", *ptr = buffer;
  unsigned int cur_len = 0, len;

  for (unsigned int i = 1; i < (unsigned int)parc - 1; ++i)
  {
    len = strlen(parv[i]) + 1;  /* +1 for the space */

    /* Drop the whole command if this parameter would be truncated */
    if ((cur_len + len) >= sizeof(buffer))
      return;

    snprintf(ptr, sizeof(buffer) - cur_len, "%s ", parv[i]);
    cur_len += len;
    ptr += len;
  }

  /* If it's a command without parameters, don't prepend a ':' */
  if (parc == 3)
    snprintf(ptr, sizeof(buffer) - cur_len, "%s", parv[2]);
  else
    snprintf(ptr, sizeof(buffer) - cur_len, ":%s", parv[parc - 1]);

  sendto_match_servs(source_p, parv[1], CAPAB_ENCAP, "ENCAP %s", buffer);

  if (match(parv[1], me.name))
    return;

  struct Message *message = find_command(parv[2]);
  if (message == NULL)
    return;

  const struct MessageHandler *const handler = &message->handlers[ENCAP_HANDLER];
  message->bytes += strlen(buffer);
  parv += 2;
  parc -= 2;

  if (handler->args_min &&
      (((unsigned int)parc < handler->args_min) ||
       (handler->empty_last_arg != true && EmptyString(parv[handler->args_min - 1]))))
    return;

  handler->handler(source_p, parc, parv);
}

static struct Message encap_msgtab =
{
  .cmd = "ENCAP",
  .handlers[UNREGISTERED_HANDLER] = { .handler = m_ignore },
  .handlers[CLIENT_HANDLER] = { .handler = m_ignore },
  .handlers[SERVER_HANDLER] = { .handler = ms_encap, .args_min = 3 },
  .handlers[ENCAP_HANDLER] = { .handler = m_ignore },
  .handlers[OPER_HANDLER] = { .handler = m_ignore }
};

static void
module_init(void)
{
  mod_add_cmd(&encap_msgtab);
  capab_add("ENCAP", CAPAB_ENCAP);
}

static void
module_exit(void)
{
  mod_del_cmd(&encap_msgtab);
  capab_del("ENCAP");
}

struct module module_entry =
{
  .version = "$Revision$",
  .modinit = module_init,
  .modexit = module_exit,
};
Revision:	9374
Committed:	Sat May 9 20:54:46 2020 UTC (6 years, 2 months ago) by michael
Content type:	text/x-csrc
File size:	3258 byte(s)
Log Message:	- Each type of command handler now has its own min/max argument count pair; remove remaining argument checks from all modules
#	User	Rev	Content
1	adx	30	/*
2	michael	2816	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	9101	* Copyright (c) 2003-2020 ircd-hybrid development team
5	adx	30	*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18	michael	4565	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	adx	30	* USA
20			*/
21
22	michael	2816	/*! \file m_encap.c
23			* \brief Includes required functions for processing the ENCAP command.
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28			#include "client.h"
29			#include "parse.h"
30	michael	8166	#include "server_capab.h"
31	adx	30	#include "send.h"
32			#include "modules.h"
33			#include "irc_string.h"
34
35
36			/*
37			* ms_encap()
38			*
39			* inputs - destination server, subcommand, parameters
40			* output - none
41			* side effects - propagates subcommand to locally connected servers
42			*/
43	michael	9077	static void
44	michael	3156	ms_encap(struct Client source_p, int parc, char parv[])
45	adx	30	{
46	michael	3215	char buffer[IRCD_BUFSIZE] = "", *ptr = buffer;
47	michael	9374	unsigned int cur_len = 0, len;
48	adx	30
49	michael	9374	for (unsigned int i = 1; i < (unsigned int)parc - 1; ++i)
50	adx	30	{
51	michael	8260	len = strlen(parv[i]) + 1; /* +1 for the space */
52	adx	30
53	michael	8260	/* Drop the whole command if this parameter would be truncated */
54	adx	30	if ((cur_len + len) >= sizeof(buffer))
55	michael	9077	return;
56	adx	30
57	michael	1233	snprintf(ptr, sizeof(buffer) - cur_len, "%s ", parv[i]);
58	adx	30	cur_len += len;
59			ptr += len;
60			}
61
62	michael	3037	/* If it's a command without parameters, don't prepend a ':' */
63	adx	30	if (parc == 3)
64	michael	1233	snprintf(ptr, sizeof(buffer) - cur_len, "%s", parv[2]);
65	adx	30	else
66	michael	1233	snprintf(ptr, sizeof(buffer) - cur_len, ":%s", parv[parc - 1]);
67	adx	30
68	michael	9374	sendto_match_servs(source_p, parv[1], CAPAB_ENCAP, "ENCAP %s", buffer);
69	adx	30
70	michael	1652	if (match(parv[1], me.name))
71	michael	9077	return;
72	adx	30
73	michael	9374	struct Message *message = find_command(parv[2]);
74			if (message == NULL)
75	michael	9077	return;
76	adx	30
77	michael	9374	const struct MessageHandler *const handler = &message->handlers[ENCAP_HANDLER];
78			message->bytes += strlen(buffer);
79	adx	30	parv += 2;
80			parc -= 2;
81
82	michael	9374	if (handler->args_min &&
83			(((unsigned int)parc < handler->args_min) \|\|
84			(handler->empty_last_arg != true && EmptyString(parv[handler->args_min - 1]))))
85			return;
86
87			handler->handler(source_p, parc, parv);
88	adx	30	}
89	michael	1230
90	michael	2816	static struct Message encap_msgtab =
91			{
92	michael	5881	.cmd = "ENCAP",
93	michael	9374	.handlers[UNREGISTERED_HANDLER] = { .handler = m_ignore },
94			.handlers[CLIENT_HANDLER] = { .handler = m_ignore },
95			.handlers[SERVER_HANDLER] = { .handler = ms_encap, .args_min = 3 },
96			.handlers[ENCAP_HANDLER] = { .handler = m_ignore },
97			.handlers[OPER_HANDLER] = { .handler = m_ignore }
98	michael	1230	};
99
100			static void
101			module_init(void)
102			{
103			mod_add_cmd(&encap_msgtab);
104	michael	8166	capab_add("ENCAP", CAPAB_ENCAP);
105	michael	1230	}
106
107			static void
108			module_exit(void)
109			{
110			mod_del_cmd(&encap_msgtab);
111	michael	8166	capab_del("ENCAP");
112	michael	1230	}
113
114	michael	2816	struct module module_entry =
115			{
116	michael	1230	.version = "$Revision$",
117			.modinit = module_init,
118			.modexit = module_exit,
119			};