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1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <sys/socket.h> | |
23 | #include <sys/un.h> | |
24 | ||
25 | #ifdef HAVE_LIBWRAP | |
26 | #include <tcpd.h> | |
27 | #endif | |
28 | ||
29 | #include "tcpwrap.h" | |
30 | #include "log.h" | |
31 | ||
32 | bool socket_tcpwrap(int fd, const char *name) { | |
33 | #ifdef HAVE_LIBWRAP | |
34 | struct request_info req; | |
35 | union { | |
36 | struct sockaddr sa; | |
37 | struct sockaddr_in in; | |
38 | struct sockaddr_in6 in6; | |
39 | struct sockaddr_un un; | |
40 | struct sockaddr_storage storage; | |
41 | } sa_union; | |
42 | socklen_t l = sizeof(sa_union); | |
43 | ||
44 | if (getsockname(fd, &sa_union.sa, &l) < 0) | |
45 | return true; | |
46 | ||
47 | if (sa_union.sa.sa_family != AF_INET && | |
48 | sa_union.sa.sa_family != AF_INET6) | |
49 | return true; | |
50 | ||
51 | request_init(&req, | |
52 | RQ_DAEMON, name, | |
53 | RQ_FILE, fd, | |
54 | NULL); | |
55 | ||
56 | fromhost(&req); | |
57 | ||
58 | if (!hosts_access(&req)) { | |
59 | log_warning("Connection refused by tcpwrap."); | |
60 | return false; | |
61 | } | |
62 | ||
63 | log_debug("Connection accepted by tcpwrap."); | |
64 | #endif | |
65 | return true; | |
66 | } |