]>
Commit | Line | Data |
---|---|---|
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 | ||
6445c1cf | 26 | static void handle_reload(int parc, char *parv[]); |
394b8dde EM |
27 | static void handle_stat(int parc, char *parv[]); |
28 | ||
f3e11b1d | 29 | rb_helper *authd_helper = NULL; |
6f39a80e | 30 | authd_cmd_handler authd_cmd_handlers[256] = { |
122ae255 | 31 | ['R'] = handle_reload, |
8cf45447 | 32 | ['D'] = resolve_dns, |
394b8dde EM |
33 | ['S'] = handle_stat, |
34 | }; | |
35 | ||
6f39a80e | 36 | authd_stat_handler authd_stat_handlers[256] = { |
394b8dde | 37 | ['D'] = enumerate_nameservers, |
8cf45447 | 38 | }; |
0d73e7db | 39 | |
6f39a80e | 40 | authd_reload_handler authd_reload_handlers[256] = { |
6445c1cf EM |
41 | ['D'] = reload_nameservers, |
42 | }; | |
43 | ||
394b8dde EM |
44 | static void |
45 | handle_stat(int parc, char *parv[]) | |
46 | { | |
47 | authd_stat_handler handler; | |
48 | ||
49 | if(parc < 3) | |
50 | /* XXX Should log this somehow */ | |
51 | return; | |
52 | ||
e23126c8 | 53 | if (!(handler = authd_stat_handlers[(unsigned char)parv[2][0]])) |
394b8dde EM |
54 | return; |
55 | ||
56 | handler(parv[1], parv[2][0]); | |
57 | } | |
58 | ||
6445c1cf EM |
59 | static void |
60 | handle_reload(int parc, char *parv[]) | |
61 | { | |
62 | authd_reload_handler handler; | |
63 | ||
64 | if(parc < 2) | |
122ae255 EM |
65 | { |
66 | /* Reload all handlers */ | |
67 | for(size_t i = 0; i < sizeof(authd_reload_handlers); handler = authd_reload_handlers[i++]) | |
68 | handler(parv[1][0]); | |
69 | ||
6445c1cf | 70 | return; |
122ae255 | 71 | } |
6445c1cf | 72 | |
e23126c8 | 73 | if (!(handler = authd_reload_handlers[(unsigned char)parv[1][0]])) |
6445c1cf EM |
74 | return; |
75 | ||
76 | handler(parv[1][0]); | |
77 | } | |
78 | ||
0d73e7db AC |
79 | static void |
80 | parse_request(rb_helper *helper) | |
81 | { | |
82 | static char *parv[MAXPARA + 1]; | |
83 | static char readbuf[READBUF_SIZE]; | |
84 | int parc; | |
85 | int len; | |
f3e11b1d | 86 | authd_cmd_handler handler; |
0d73e7db AC |
87 | |
88 | while((len = rb_helper_read(helper, readbuf, sizeof(readbuf))) > 0) | |
89 | { | |
90 | parc = rb_string_to_array(readbuf, parv, MAXPARA); | |
91 | ||
92 | if(parc < 1) | |
93 | continue; | |
94 | ||
e23126c8 | 95 | handler = authd_cmd_handlers[(unsigned char)parv[0][0]]; |
f3e11b1d AC |
96 | if (handler != NULL) |
97 | handler(parc, parv); | |
0d73e7db AC |
98 | } |
99 | } | |
100 | ||
101 | static void | |
102 | error_cb(rb_helper *helper) | |
103 | { | |
104 | exit(1); | |
105 | } | |
106 | ||
8da0b2f2 | 107 | #ifndef _WIN32 |
0d73e7db AC |
108 | static void |
109 | dummy_handler(int sig) | |
110 | { | |
111 | return; | |
112 | } | |
113 | #endif | |
114 | ||
115 | static void | |
116 | setup_signals(void) | |
117 | { | |
8da0b2f2 | 118 | #ifndef _WIN32 |
0d73e7db AC |
119 | struct sigaction act; |
120 | ||
121 | act.sa_flags = 0; | |
122 | act.sa_handler = SIG_IGN; | |
123 | sigemptyset(&act.sa_mask); | |
124 | sigaddset(&act.sa_mask, SIGPIPE); | |
125 | sigaddset(&act.sa_mask, SIGALRM); | |
126 | #ifdef SIGTRAP | |
127 | sigaddset(&act.sa_mask, SIGTRAP); | |
128 | #endif | |
129 | ||
130 | #ifdef SIGWINCH | |
131 | sigaddset(&act.sa_mask, SIGWINCH); | |
132 | sigaction(SIGWINCH, &act, 0); | |
133 | #endif | |
134 | sigaction(SIGPIPE, &act, 0); | |
135 | #ifdef SIGTRAP | |
136 | sigaction(SIGTRAP, &act, 0); | |
137 | #endif | |
138 | ||
139 | act.sa_handler = dummy_handler; | |
140 | sigaction(SIGALRM, &act, 0); | |
141 | #endif | |
142 | } | |
143 | ||
144 | int | |
145 | main(int argc, char *argv[]) | |
146 | { | |
147 | setup_signals(); | |
148 | ||
149 | authd_helper = rb_helper_child(parse_request, error_cb, NULL, NULL, NULL, 256, 256, 256); /* XXX fix me */ | |
150 | if(authd_helper == NULL) | |
151 | { | |
152 | fprintf(stderr, "authd is not meant to be invoked by end users\n"); | |
153 | exit(1); | |
154 | } | |
155 | ||
8cf45447 AC |
156 | rb_set_time(); |
157 | setup_signals(); | |
158 | init_resolver(); | |
159 | rb_init_prng(NULL, RB_PRNG_DEFAULT); | |
160 | ||
0d73e7db AC |
161 | rb_helper_loop(authd_helper, 0); |
162 | ||
163 | return 0; | |
164 | } |