+ * Include stdlib.h in adnshost.h.
[adns] / client / adnslogres.c
1 /*
2 * adnslogres.c
3 * - a replacement for the Apache logresolve program using adns
4 */
5 /*
6 * This file is
7 * Copyright (C) 1999 Tony Finch <dot@dotat.at>
8 * Copyright (C) 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 * This version was originally supplied by Tony Finch, but has been
29 * modified by Ian Jackson as it was incorporated into adns.
30 */
31
32 static const char * const cvsid =
33 "$Id$";
34
35 #include <sys/types.h>
36 #include <sys/time.h>
37
38 #include <unistd.h>
39 #include <string.h>
40 #include <stdlib.h>
41 #include <stdio.h>
42 #include <ctype.h>
43 #include <errno.h>
44
45 #include "adns.h"
46
47 /* maximum number of concurrent DNS queries */
48 #define MAXPENDING 1000
49
50 /* maximum length of a line */
51 #define MAXLINE 1024
52
53 /* option flags */
54 #define OPT_DEBUG 1
55 #define OPT_POLL 2
56
57 static const char *progname;
58
59 static void aargh(const char *msg) {
60 fprintf(stderr, "%s: %s: %s (%d)\n", progname, msg,
61 strerror(errno) ? strerror(errno) : "Unknown error", errno);
62 exit(1);
63 }
64
65 /*
66 * Parse the IP address and convert to a reverse domain name.
67 */
68 static char *ipaddr2domain(char *start, char **addr, char **rest) {
69 static char buf[30]; /* "123.123.123.123.in-addr.arpa.\0" */
70 char *ptrs[5];
71 int i;
72
73 ptrs[0]= start;
74 retry:
75 while (!isdigit(*ptrs[0]))
76 if (!*ptrs[0]++) {
77 strcpy(buf, "invalid.");
78 *addr= *rest= NULL;
79 return buf;
80 }
81 for (i= 1; i < 5; i++) {
82 ptrs[i]= ptrs[i-1];
83 while (isdigit(*ptrs[i]++));
84 if ((i == 4 && !isspace(ptrs[i][-1])) ||
85 (i != 4 && ptrs[i][-1] != '.') ||
86 (ptrs[i]-ptrs[i-1] > 4)) {
87 ptrs[0]= ptrs[i]-1;
88 goto retry;
89 }
90 }
91 sprintf(buf, "%.*s.%.*s.%.*s.%.*s.in-addr.arpa.",
92 ptrs[4]-ptrs[3]-1, ptrs[3],
93 ptrs[3]-ptrs[2]-1, ptrs[2],
94 ptrs[2]-ptrs[1]-1, ptrs[1],
95 ptrs[1]-ptrs[0]-1, ptrs[0]);
96 *addr= ptrs[0];
97 *rest= ptrs[4]-1;
98 return buf;
99 }
100
101 static void printline(FILE *outf, char *start, char *addr, char *rest, char *domain) {
102 if (domain)
103 fprintf(outf, "%.*s%s%s", addr - start, start, domain, rest);
104 else
105 fputs(start, outf);
106 if (ferror(outf)) aargh("write output");
107 }
108
109 typedef struct logline {
110 struct logline *next;
111 char *start, *addr, *rest;
112 adns_query query;
113 } logline;
114
115 static logline *readline(FILE *inf, adns_state adns, int opts) {
116 static char buf[MAXLINE];
117 char *str;
118 logline *line;
119
120 if (fgets(buf, MAXLINE, inf)) {
121 str= malloc(sizeof(*line) + strlen(buf) + 1);
122 if (!str) aargh("malloc");
123 line= (logline*)str;
124 line->next= NULL;
125 line->start= str+sizeof(logline);
126 strcpy(line->start, buf);
127 str= ipaddr2domain(line->start, &line->addr, &line->rest);
128 if (opts & OPT_DEBUG)
129 msg("submitting %.*s -> %s", line->rest-line->addr, line->addr, str);
130 if (adns_submit(adns, str, adns_r_ptr,
131 adns_qf_quoteok_cname|adns_qf_cname_loose,
132 NULL, &line->query))
133 aargh("adns_submit");
134 return line;
135 }
136 if (!feof(inf))
137 aargh("fgets");
138 return NULL;
139 }
140
141 static void proclog(FILE *inf, FILE *outf, int opts) {
142 int eof, err, len;
143 adns_state adns;
144 adns_answer *answer;
145 logline *head, *tail, *line;
146
147 errno= adns_init(&adns, (opts & OPT_DEBUG) ? adns_if_debug : 0, 0);
148 if (errno) aargh("adns_init");
149 head= tail= readline(inf, adns, opts);
150 len= 1; eof= 0;
151 while (head) {
152 if (opts & OPT_DEBUG)
153 msg("%d in queue; checking %.*s", len,
154 head->rest-head->addr, head->addr);
155 if (eof || len > MAXPENDING)
156 if (opts & OPT_POLL)
157 err= adns_wait_poll(adns, &head->query, &answer, NULL);
158 else
159 err= adns_wait(adns, &head->query, &answer, NULL);
160 else
161 err= adns_check(adns, &head->query, &answer, NULL);
162 if (err != EAGAIN) {
163 printline(outf, head->start, head->addr, head->rest,
164 answer->status == adns_s_ok ? *answer->rrs.str : NULL);
165 line= head; head= head->next;
166 free(line); free(answer);
167 len--;
168 }
169 if (!eof) {
170 line= readline(inf, adns, opts);
171 if (!line)
172 eof= 1;
173 else {
174 if (!head)
175 head= line;
176 else
177 tail->next= line;
178 tail= line;
179 len++;
180 }
181 }
182 }
183 adns_finish(adns);
184 }
185
186 static void usage(void) {
187 fprintf(stderr, "usage: %s [-d] [-p] [logfile]\n", progname);
188 exit(1);
189 }
190
191 int main(int argc, char *argv[]) {
192 int c, opts;
193 FILE *inf;
194
195 progname= strrchr(*argv, '/');
196 if (progname)
197 progname++;
198 else
199 progname= *argv;
200 opts= 0;
201
202 while ((c= getopt(argc, argv, "dp")) != -1)
203 switch (c) {
204 case 'd':
205 opts|= OPT_DEBUG;
206 break;
207 case 'p':
208 opts|= OPT_POLL;
209 break;
210 default:
211 usage();
212 }
213
214 argc-= optind;
215 argv+= optind;
216
217 inf= NULL;
218 if (argc == 0)
219 inf= stdin;
220 else if (argc == 1)
221 inf= fopen(*argv, "r");
222 else
223 usage();
224
225 if (!inf)
226 aargh("couldn't open input");
227
228 proclog(inf, stdout, opts);
229
230 if (fclose(inf))
231 aargh("fclose input");
232 if (fclose(stdout))
233 aargh("fclose output");
234
235 return 0;
236 }