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0d73e7db AC |
1 | /* authd/authd.c - main code for authd |
2 | * Copyright (c) 2016 William Pitcock <nenolod@dereferenced.org> | |
3 | * | |
4 | * Permission to use, copy, modify, and/or distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice is present in all copies. | |
7 | * | |
8 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
9 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
10 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
11 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, | |
12 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
13 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
14 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
15 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
16 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
17 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
18 | * POSSIBILITY OF SUCH DAMAGE. | |
19 | */ | |
20 | ||
f3e11b1d AC |
21 | #include "authd.h" |
22 | #include "dns.h" | |
0d73e7db AC |
23 | |
24 | #define MAXPARA 10 | |
25 | ||
f3e11b1d | 26 | rb_helper *authd_helper = NULL; |
8cf45447 AC |
27 | authd_cmd_handler authd_cmd_handlers[255] = { |
28 | ['D'] = resolve_dns, | |
29 | }; | |
0d73e7db AC |
30 | |
31 | static void | |
32 | parse_request(rb_helper *helper) | |
33 | { | |
34 | static char *parv[MAXPARA + 1]; | |
35 | static char readbuf[READBUF_SIZE]; | |
36 | int parc; | |
37 | int len; | |
f3e11b1d | 38 | authd_cmd_handler handler; |
0d73e7db AC |
39 | |
40 | while((len = rb_helper_read(helper, readbuf, sizeof(readbuf))) > 0) | |
41 | { | |
42 | parc = rb_string_to_array(readbuf, parv, MAXPARA); | |
43 | ||
44 | if(parc < 1) | |
45 | continue; | |
46 | ||
f3e11b1d AC |
47 | handler = authd_cmd_handlers[parv[0][0]]; |
48 | if (handler != NULL) | |
49 | handler(parc, parv); | |
0d73e7db AC |
50 | } |
51 | } | |
52 | ||
53 | static void | |
54 | error_cb(rb_helper *helper) | |
55 | { | |
56 | exit(1); | |
57 | } | |
58 | ||
59 | #ifndef WINDOWS | |
60 | static void | |
61 | dummy_handler(int sig) | |
62 | { | |
63 | return; | |
64 | } | |
65 | #endif | |
66 | ||
67 | static void | |
68 | setup_signals(void) | |
69 | { | |
70 | #ifndef WINDOWS | |
71 | struct sigaction act; | |
72 | ||
73 | act.sa_flags = 0; | |
74 | act.sa_handler = SIG_IGN; | |
75 | sigemptyset(&act.sa_mask); | |
76 | sigaddset(&act.sa_mask, SIGPIPE); | |
77 | sigaddset(&act.sa_mask, SIGALRM); | |
78 | #ifdef SIGTRAP | |
79 | sigaddset(&act.sa_mask, SIGTRAP); | |
80 | #endif | |
81 | ||
82 | #ifdef SIGWINCH | |
83 | sigaddset(&act.sa_mask, SIGWINCH); | |
84 | sigaction(SIGWINCH, &act, 0); | |
85 | #endif | |
86 | sigaction(SIGPIPE, &act, 0); | |
87 | #ifdef SIGTRAP | |
88 | sigaction(SIGTRAP, &act, 0); | |
89 | #endif | |
90 | ||
91 | act.sa_handler = dummy_handler; | |
92 | sigaction(SIGALRM, &act, 0); | |
93 | #endif | |
94 | } | |
95 | ||
96 | int | |
97 | main(int argc, char *argv[]) | |
98 | { | |
99 | setup_signals(); | |
100 | ||
101 | authd_helper = rb_helper_child(parse_request, error_cb, NULL, NULL, NULL, 256, 256, 256); /* XXX fix me */ | |
102 | if(authd_helper == NULL) | |
103 | { | |
104 | fprintf(stderr, "authd is not meant to be invoked by end users\n"); | |
105 | exit(1); | |
106 | } | |
107 | ||
8cf45447 AC |
108 | rb_set_time(); |
109 | setup_signals(); | |
110 | init_resolver(); | |
111 | rb_init_prng(NULL, RB_PRNG_DEFAULT); | |
112 | ||
0d73e7db AC |
113 | rb_helper_loop(authd_helper, 0); |
114 | ||
115 | return 0; | |
116 | } |