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1 | /* |
2 | * adh-query.c |
3 | * - useful general-purpose resolver client program |
4 | * make queries and print answers |
5 | */ |
6 | /* |
7 | * This file is |
8 | * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk> |
9 | * |
10 | * It is part of adns, which is |
11 | * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk> |
12 | * Copyright (C) 1999 Tony Finch <dot@dotat.at> |
13 | * |
14 | * This program is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU General Public License as published by |
16 | * the Free Software Foundation; either version 2, or (at your option) |
17 | * any later version. |
18 | * |
19 | * This program is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU General Public License |
25 | * along with this program; if not, write to the Free Software Foundation, |
26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
27 | */ |
28 | |
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29 | #include "adnshost.h" |
30 | |
31 | adns_state ads; |
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32 | struct outstanding_list outstanding; |
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33 | |
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34 | static unsigned long idcounter; |
35 | |
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36 | void ensure_adns_init(void) { |
37 | int r; |
38 | |
39 | if (ads) return; |
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40 | |
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41 | if (signal(SIGPIPE,SIG_IGN) == SIG_ERR) sysfail("ignore SIGPIPE",errno); |
42 | r= adns_init(&ads, |
43 | adns_if_noautosys|adns_if_nosigpipe | |
44 | (ov_env ? 0 : adns_if_noenv) | |
45 | ov_verbose, |
46 | 0); |
47 | if (r) sysfail("adns_init",r); |
48 | } |
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49 | |
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50 | void query_do(const char *domain) { |
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51 | struct query_node *qun; |
52 | char idbuf[20]; |
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53 | int r; |
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54 | |
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55 | qun= malloc(sizeof(*qun)); |
56 | qun->pqfr= ov_pqfr; |
57 | if (ov_id) { |
58 | qun->id= xstrsave(ov_id); |
59 | } else { |
60 | sprintf(idbuf,"%lu",idcounter++); |
61 | idcounter &= 0x0fffffffflu; |
62 | qun->id= xstrsave(idbuf); |
63 | } |
64 | |
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65 | r= adns_submit(ads, domain, |
66 | ov_type == adns_r_none ? adns_r_addr : ov_type, |
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67 | (ov_search ? adns_qf_search : 0) | |
68 | (ov_tcp ? adns_qf_usevc : 0) | |
69 | (ov_pqfr.show_owner ? adns_qf_owner : 0) | |
70 | (ov_qc_query ? adns_qf_quoteok_query : 0) | |
71 | (ov_qc_anshost ? adns_qf_quoteok_anshost : 0) | |
72 | (ov_qc_cname ? 0 : adns_qf_quoteok_cname) | |
73 | ov_cname, |
74 | qun, |
75 | &qun->qu); |
76 | if (r) sysfail("adns_submit",r); |
77 | |
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78 | LIST_LINK_TAIL(outstanding,qun); |
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79 | } |
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80 | |
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81 | static void dequeue_query(struct query_node *qun) { |
82 | LIST_UNLINK(outstanding,qun); |
83 | free(qun->id); |
84 | free(qun); |
85 | } |
86 | |
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87 | static void print_withspace(const char *str) { |
88 | if (printf("%s ", str) == EOF) outerr(); |
89 | } |
90 | |
91 | static void print_ttl(struct query_node *qun, adns_answer *answer) { |
92 | unsigned long ttl; |
93 | time_t now; |
94 | |
95 | switch (qun->pqfr.ttl) { |
96 | case tm_none: |
97 | return; |
98 | case tm_rel: |
99 | if (time(&now) == (time_t)-1) sysfail("get current time",errno); |
100 | ttl= answer->expires < now ? 0 : answer->expires - now; |
101 | break; |
102 | case tm_abs: |
103 | ttl= answer->expires; |
104 | break; |
105 | default: |
106 | abort(); |
107 | } |
108 | if (printf("%lu ",ttl) == EOF) outerr(); |
109 | } |
110 | |
111 | static void print_owner_ttl(struct query_node *qun, adns_answer *answer) { |
112 | if (qun->pqfr.show_owner) print_withspace(answer->owner); |
113 | print_ttl(qun,answer); |
114 | } |
115 | |
116 | static void print_status(adns_status st, struct query_node *qun, adns_answer *answer) { |
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117 | static const adns_status statuspoints[]= { |
118 | adns_s_ok, |
119 | adns_s_max_localfail, adns_s_max_remotefail, adns_s_max_tempfail, |
120 | adns_s_max_misconfig, adns_s_max_misquery |
121 | }; |
122 | |
123 | const adns_status *spp; |
124 | const char *statustypeabbrev, *statusabbrev, *statusstring; |
125 | int minrcode; |
126 | |
127 | statustypeabbrev= adns_errtypeabbrev(st); |
128 | for (minrcode=0, spp=statuspoints; |
129 | spp < statuspoints + (sizeof(statuspoints)/sizeof(statuspoints[0])); |
130 | spp++) |
131 | if (st > *spp) minrcode++; |
132 | if (rcode < minrcode) rcode= minrcode; |
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133 | |
134 | statusabbrev= adns_errabbrev(st); |
135 | statusstring= adns_strerror(st); |
136 | assert(!strchr(statusstring,'"')); |
137 | |
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138 | if (printf("%s %d %s ", statustypeabbrev, st, statusabbrev) |
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139 | == EOF) outerr(); |
140 | print_owner_ttl(qun,answer); |
141 | if (qun->pqfr.show_cname) |
142 | print_withspace(answer->cname ? answer->cname : "$"); |
143 | if (printf("\"%s\"\n", statusstring) == EOF) outerr(); |
144 | } |
145 | |
146 | void query_done(struct query_node *qun, adns_answer *answer) { |
147 | adns_status st, ist; |
148 | int rrn, nrrs; |
149 | const char *rrp, *realowner, *typename; |
150 | char *datastr; |
151 | |
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152 | st= answer->status; |
153 | nrrs= answer->nrrs; |
154 | if (ov_asynch) { |
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155 | if (printf("%s %d ", qun->id, nrrs) == EOF) outerr(); |
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156 | print_status(st,qun,answer); |
157 | } else { |
158 | if (st) { |
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159 | if (fputs("; failed ",stdout) == EOF) outerr(); |
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160 | print_status(st,qun,answer); |
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161 | } else if (qun->pqfr.show_cname && answer->cname) { |
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162 | print_owner_ttl(qun,answer); |
163 | if (printf("CNAME %s\n",answer->cname) == EOF) outerr(); |
164 | } |
165 | } |
166 | if (qun->pqfr.show_owner) { |
167 | realowner= answer->cname ? answer->cname : answer->owner;; |
168 | assert(realowner); |
169 | } else { |
170 | realowner= 0; |
171 | } |
172 | if (nrrs) { |
173 | for (rrn=0, rrp = answer->rrs.untyped; |
174 | rrn < nrrs; |
175 | rrn++, rrp += answer->rrsz) { |
176 | if (realowner) print_withspace(realowner); |
177 | print_ttl(qun,answer); |
178 | ist= adns_rr_info(answer->type, &typename, 0, 0, rrp, &datastr); |
179 | if (ist == adns_s_nomemory) sysfail("adns_rr_info failed",ENOMEM); |
180 | assert(!ist); |
181 | if (qun->pqfr.show_type) print_withspace(typename); |
182 | if (printf("%s\n",datastr) == EOF) outerr(); |
183 | free(datastr); |
184 | } |
185 | } |
186 | if (fflush(stdout)) outerr(); |
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187 | free(answer); |
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188 | dequeue_query(qun); |
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189 | } |
190 | |
191 | void of_asynch_id(const struct optioninfo *oi, const char *arg) { |
192 | free(ov_id); |
193 | ov_id= xstrsave(arg); |
194 | } |
195 | |
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196 | void of_cancel_id(const struct optioninfo *oi, const char *arg) { |
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197 | struct query_node *qun; |
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198 | |
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199 | for (qun= outstanding.head; |
200 | qun && !strcmp(qun->id,arg); |
201 | qun= qun->next); |
202 | if (!qun) return; |
203 | adns_cancel(qun->qu); |
204 | dequeue_query(qun); |
205 | } |