blacklist.c revision 318402 
1/*-
2 * Copyright (c) 2015 The NetBSD Foundation, Inc.
3 * Copyright (c) 2016 The FreeBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * Portions of this software were developed by Kurt Lidl
7 * under sponsorship from the FreeBSD Foundation.
8 *
9 * This code is derived from software contributed to The NetBSD Foundation
10 * by Christos Zoulas.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include "includes.h"
35
36#include <ctype.h>
37#include <stdarg.h>
38#include <stdbool.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <syslog.h>
42#include <unistd.h>
43
44#include "ssh.h"
45#include "packet.h"
46#include "log.h"
47#include "misc.h"
48#include "servconf.h"
49#include <blacklist.h>
50#include "blacklist_client.h"
51
52static struct blacklist *blstate = NULL;
53
54/* import */
55extern ServerOptions options;
56
57/* internal definition from bl.h */
58struct blacklist *bl_create(bool, char *, void (*)(int, const char *, va_list));
59
60/* impedence match vsyslog() to sshd's internal logging levels */
61void
62im_log(int priority, const char *message, va_list args)
63{
64	LogLevel imlevel;
65
66	switch (priority) {
67	case LOG_ERR:
68		imlevel = SYSLOG_LEVEL_ERROR;
69		break;
70	case LOG_DEBUG:
71		imlevel = SYSLOG_LEVEL_DEBUG1;
72		break;
73	case LOG_INFO:
74		imlevel = SYSLOG_LEVEL_INFO;
75		break;
76	default:
77		imlevel = SYSLOG_LEVEL_DEBUG2;
78	}
79	do_log(imlevel, message, args);
80}
81
82void
83blacklist_init(void)
84{
85
86	if (options.use_blacklist)
87		blstate = bl_create(false, NULL, im_log);
88}
89
90void
91blacklist_notify(int action, const char *msg)
92{
93
94	if (blstate != NULL && packet_connection_is_on_socket())
95		(void)blacklist_r(blstate, action,
96		packet_get_connection_in(), msg);
97}
98