d1cff511 |
1 | /* |
2 | * adh-main.c |
3 | * - useful general-purpose resolver client program |
4 | * main program and useful subroutines |
5 | */ |
6 | /* |
ae8cc977 |
7 | * This file is part of adns, which is |
8 | * Copyright (C) 1997-2000,2003,2006 Ian Jackson |
9 | * Copyright (C) 1999-2000,2003,2006 Tony Finch |
10 | * Copyright (C) 1991 Massachusetts Institute of Technology |
11 | * (See the file INSTALL for full details.) |
d1cff511 |
12 | * |
13 | * This program is free software; you can redistribute it and/or modify |
14 | * it under the terms of the GNU General Public License as published by |
15 | * the Free Software Foundation; either version 2, or (at your option) |
16 | * any later version. |
17 | * |
18 | * This program is distributed in the hope that it will be useful, |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
21 | * GNU General Public License for more details. |
22 | * |
23 | * You should have received a copy of the GNU General Public License |
24 | * along with this program; if not, write to the Free Software Foundation, |
25 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
26 | */ |
27 | |
e3f575ff |
28 | #include "adnshost.h" |
d1cff511 |
29 | |
0ebff22d |
30 | int rcode; |
31 | const char *config_text; |
32 | |
33 | static int used, avail; |
34 | static char *buf; |
35 | |
36 | void quitnow(int rc) { |
37 | if (ads) adns_finish(ads); |
38 | free(buf); |
39 | free(ov_id); |
40 | exit(rc); |
41 | } |
42 | |
d1cff511 |
43 | void sysfail(const char *what, int errnoval) { |
44 | fprintf(stderr,"adnshost failed: %s: %s\n",what,strerror(errnoval)); |
0ebff22d |
45 | quitnow(10); |
d1cff511 |
46 | } |
47 | |
e3f575ff |
48 | void usageerr(const char *fmt, ...) { |
49 | va_list al; |
50 | fputs("adnshost usage error: ",stderr); |
51 | va_start(al,fmt); |
52 | vfprintf(stderr,fmt,al); |
53 | va_end(al); |
54 | putc('\n',stderr); |
0ebff22d |
55 | quitnow(11); |
e3f575ff |
56 | } |
57 | |
57d68ed1 |
58 | void outerr(void) { |
59 | sysfail("write to stdout",errno); |
60 | } |
61 | |
e3f575ff |
62 | void *xmalloc(size_t sz) { |
63 | void *p; |
64 | |
65 | p= malloc(sz); if (!p) sysfail("malloc",sz); |
66 | return p; |
67 | } |
68 | |
69 | char *xstrsave(const char *str) { |
70 | char *p; |
71 | |
72 | p= xmalloc(strlen(str)+1); |
73 | strcpy(p,str); |
74 | return p; |
d1cff511 |
75 | } |
76 | |
0ebff22d |
77 | void of_config(const struct optioninfo *oi, const char *arg, const char *arg2) { |
78 | config_text= arg; |
79 | } |
80 | |
2b1c6979 |
81 | void of_type(const struct optioninfo *oi, const char *arg, const char *arg2) { |
9fa14499 |
82 | static const struct typename { |
83 | adns_rrtype type; |
84 | const char *desc; |
85 | } typenames[]= { |
86 | /* enhanced versions */ |
87 | { adns_r_ns, "ns" }, |
88 | { adns_r_soa, "soa" }, |
89 | { adns_r_ptr, "ptr" }, |
90 | { adns_r_mx, "mx" }, |
91 | { adns_r_rp, "rp" }, |
401c256a |
92 | { adns_r_srv, "srv" }, |
9fa14499 |
93 | { adns_r_addr, "addr" }, |
94 | |
95 | /* types with only one version */ |
96 | { adns_r_cname, "cname" }, |
97 | { adns_r_hinfo, "hinfo" }, |
98 | { adns_r_txt, "txt" }, |
99 | |
100 | /* raw versions */ |
101 | { adns_r_a, "a" }, |
102 | { adns_r_ns_raw, "ns-" }, |
103 | { adns_r_soa_raw, "soa-" }, |
104 | { adns_r_ptr_raw, "ptr-" }, |
105 | { adns_r_mx_raw, "mx-" }, |
106 | { adns_r_rp_raw, "rp-" }, |
401c256a |
107 | { adns_r_srv_raw, "srv-" }, |
d1cff511 |
108 | |
9fa14499 |
109 | { adns_r_none, 0 } |
110 | }; |
57d68ed1 |
111 | |
9fa14499 |
112 | const struct typename *tnp; |
2c6eb096 |
113 | unsigned long unknowntype; |
114 | char *ep; |
115 | |
116 | if (strlen(arg) > 4 && !memcmp(arg,"type",4) && |
117 | (unknowntype= strtoul(arg+4, &ep, 10), !*ep) && unknowntype < 65536) { |
118 | ov_type= unknowntype | adns_r_unknown; |
119 | return; |
120 | } |
57d68ed1 |
121 | |
9fa14499 |
122 | for (tnp=typenames; |
123 | tnp->type && strcmp(arg,tnp->desc); |
124 | tnp++); |
125 | if (!tnp->type) usageerr("unknown RR type %s",arg); |
126 | ov_type= tnp->type; |
127 | } |
57d68ed1 |
128 | |
9fa14499 |
129 | static void process_optarg(const char *arg, |
130 | const char *const **argv_p, |
131 | const char *value) { |
e3f575ff |
132 | const struct optioninfo *oip; |
2b1c6979 |
133 | const char *arg2; |
9fa14499 |
134 | int invert; |
135 | |
136 | if (arg[0] == '-' || arg[0] == '+') { |
137 | if (arg[0] == '-' && arg[1] == '-') { |
138 | if (!strncmp(arg,"--no-",5)) { |
139 | invert= 1; |
140 | oip= opt_findl(arg+5); |
141 | } else { |
142 | invert= 0; |
143 | oip= opt_findl(arg+2); |
144 | } |
145 | if (oip->type == ot_funcarg) { |
146 | arg= argv_p ? *++(*argv_p) : value; |
147 | if (!arg) usageerr("option --%s requires a value argument",oip->lopt); |
2b1c6979 |
148 | arg2= 0; |
149 | } else if (oip->type == ot_funcarg2) { |
150 | assert(argv_p); |
151 | arg= *++(*argv_p); |
bbede9a3 |
152 | arg2= arg ? *++(*argv_p) : 0; |
2b1c6979 |
153 | if (!arg || !arg2) |
154 | usageerr("option --%s requires two more arguments", oip->lopt); |
9fa14499 |
155 | } else { |
156 | if (value) usageerr("option --%s does not take a value",oip->lopt); |
157 | arg= 0; |
2b1c6979 |
158 | arg2= 0; |
9fa14499 |
159 | } |
2b1c6979 |
160 | opt_do(oip,invert,arg,arg2); |
9fa14499 |
161 | } else if (arg[0] == '-' && arg[1] == 0) { |
162 | arg= argv_p ? *++(*argv_p) : value; |
163 | if (!arg) usageerr("option `-' must be followed by a domain"); |
d7449548 |
164 | query_do(arg); |
9fa14499 |
165 | } else { /* arg[1] != '-', != '\0' */ |
166 | invert= (arg[0] == '+'); |
167 | ++arg; |
168 | while (*arg) { |
169 | oip= opt_finds(&arg); |
d1cff511 |
170 | if (oip->type == ot_funcarg) { |
9fa14499 |
171 | if (!*arg) { |
172 | arg= argv_p ? *++(*argv_p) : value; |
173 | if (!arg) usageerr("option -%s requires a value argument",oip->sopt); |
d1cff511 |
174 | } else { |
9fa14499 |
175 | if (value) usageerr("two values for option -%s given !",oip->sopt); |
d1cff511 |
176 | } |
2b1c6979 |
177 | opt_do(oip,invert,arg,0); |
9fa14499 |
178 | arg= ""; |
179 | } else { |
180 | if (value) usageerr("option -%s does not take a value",oip->sopt); |
2b1c6979 |
181 | opt_do(oip,invert,0,0); |
d1cff511 |
182 | } |
183 | } |
d1cff511 |
184 | } |
9fa14499 |
185 | } else { /* arg[0] != '-' */ |
d7449548 |
186 | query_do(arg); |
d1cff511 |
187 | } |
9fa14499 |
188 | } |
189 | |
190 | static void read_stdin(void) { |
9fa14499 |
191 | int anydone, r; |
192 | char *newline, *space; |
193 | |
194 | anydone= 0; |
195 | while (!anydone || used) { |
196 | while (!(newline= memchr(buf,'\n',used))) { |
197 | if (used == avail) { |
198 | avail += 20; avail <<= 1; |
199 | buf= realloc(buf,avail); |
200 | if (!buf) sysfail("realloc stdin buffer",errno); |
201 | } |
202 | do { |
203 | r= read(0,buf+used,avail-used); |
204 | } while (r < 0 && errno == EINTR); |
205 | if (r == 0) { |
206 | if (used) { |
207 | /* fake up final newline */ |
208 | buf[used++]= '\n'; |
209 | r= 1; |
210 | } else { |
211 | ov_pipe= 0; |
212 | return; |
213 | } |
214 | } |
215 | if (r < 0) sysfail("read stdin",errno); |
216 | used += r; |
217 | } |
218 | *newline++= 0; |
219 | space= strchr(buf,' '); |
220 | if (space) *space++= 0; |
221 | process_optarg(buf,0,space); |
222 | used -= (newline-buf); |
223 | memmove(buf,newline,used); |
224 | anydone= 1; |
225 | } |
226 | } |
227 | |
228 | int main(int argc, const char *const *argv) { |
229 | struct timeval *tv, tvbuf; |
230 | adns_query qu; |
231 | void *qun_v; |
232 | adns_answer *answer; |
233 | int r, maxfd; |
234 | fd_set readfds, writefds, exceptfds; |
235 | const char *arg; |
236 | |
237 | while ((arg= *++argv)) process_optarg(arg,&argv,0); |
57d68ed1 |
238 | |
94be415a |
239 | if (!ov_pipe && !ads) usageerr("no domains given, and -f/--pipe not used; try --help"); |
57d68ed1 |
240 | |
9fa14499 |
241 | ensure_adns_init(); |
242 | |
57d68ed1 |
243 | for (;;) { |
244 | for (;;) { |
245 | qu= ov_asynch ? 0 : outstanding.head ? outstanding.head->qu : 0; |
246 | r= adns_check(ads,&qu,&answer,&qun_v); |
247 | if (r == EAGAIN) break; |
248 | if (r == ESRCH) { if (!ov_pipe) goto x_quit; else break; } |
249 | assert(!r); |
250 | query_done(qun_v,answer); |
251 | } |
252 | maxfd= 0; |
253 | FD_ZERO(&readfds); |
254 | FD_ZERO(&writefds); |
255 | FD_ZERO(&exceptfds); |
256 | if (ov_pipe) { |
257 | maxfd= 1; |
258 | FD_SET(0,&readfds); |
259 | } |
260 | tv= 0; |
261 | adns_beforeselect(ads, &maxfd, &readfds,&writefds,&exceptfds, &tv,&tvbuf,0); |
262 | r= select(maxfd, &readfds,&writefds,&exceptfds, tv); |
263 | if (r == -1) { |
264 | if (errno == EINTR) continue; |
265 | sysfail("select",errno); |
266 | } |
267 | adns_afterselect(ads, maxfd, &readfds,&writefds,&exceptfds, 0); |
9fa14499 |
268 | if (ov_pipe && FD_ISSET(0,&readfds)) read_stdin(); |
57d68ed1 |
269 | } |
270 | x_quit: |
271 | if (fclose(stdout)) outerr(); |
0ebff22d |
272 | quitnow(rcode); |
d1cff511 |
273 | } |