81453aec |
1 | /* |
2 | * adnslogres.c |
3 | * - a replacement for the Apache logresolve program using adns |
4 | */ |
5 | /* |
23d78b27 |
6 | * This file is |
d942707d |
7 | * Copyright (C) 1999 Tony Finch <dot@dotat.at> |
23d78b27 |
8 | * Copyright (C) 1999 Ian Jackson <ian@davenant.greenend.org.uk> |
d942707d |
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> |
81453aec |
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, |
23d78b27 |
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. |
81453aec |
30 | */ |
31 | |
32 | static const char * const cvsid = |
33 | "$Id$"; |
34 | |
35 | #include <sys/types.h> |
36 | #include <sys/time.h> |
37 | |
940356bd |
38 | #include <unistd.h> |
81453aec |
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 | |
940356bd |
53 | /* option flags */ |
54 | #define OPT_DEBUG 1 |
55 | #define OPT_POLL 2 |
56 | |
81453aec |
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 | */ |
940356bd |
68 | static char *ipaddr2domain(char *start, char **addr, char **rest) { |
81453aec |
69 | static char buf[30]; /* "123.123.123.123.in-addr.arpa.\0" */ |
70 | char *ptrs[5]; |
71 | int i; |
72 | |
940356bd |
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 | } |
81453aec |
81 | for (i= 1; i < 5; i ++) { |
82 | ptrs[i]= strchr(ptrs[i-1], (i == 4) ? ' ' : '.'); |
940356bd |
83 | if (!ptrs[i] || ptrs[i]-ptrs[i-1] > 3) { |
84 | ptrs[0]++; |
85 | goto retry; |
86 | } else |
81453aec |
87 | ptrs[i]++; |
88 | } |
89 | sprintf(buf, "%.*s.%.*s.%.*s.%.*s.in-addr.arpa.", |
90 | ptrs[4]-ptrs[3]-1, ptrs[3], |
91 | ptrs[3]-ptrs[2]-1, ptrs[2], |
92 | ptrs[2]-ptrs[1]-1, ptrs[1], |
93 | ptrs[1]-ptrs[0]-1, ptrs[0]); |
94 | *addr= ptrs[0]; |
95 | *rest= ptrs[4]-1; |
940356bd |
96 | return buf; |
81453aec |
97 | } |
98 | |
99 | static void printline(char *start, char *addr, char *rest, char *domain) { |
100 | if (domain) |
101 | printf("%.*s%s%s", addr - start, start, domain, rest); |
102 | else |
103 | fputs(start, stdout); |
23d78b27 |
104 | if (ferror(stdout)) aargh("write output"); |
81453aec |
105 | } |
106 | |
107 | typedef struct logline { |
108 | struct logline *next; |
109 | char *start, *addr, *rest; |
110 | adns_query query; |
111 | } logline; |
112 | |
940356bd |
113 | static logline *readline(adns_state adns, int opts) { |
81453aec |
114 | static char buf[MAXLINE]; |
115 | char *str; |
116 | logline *line; |
117 | |
118 | if (fgets(buf, MAXLINE, stdin)) { |
119 | str= malloc(sizeof(*line) + strlen(buf) + 1); |
120 | if (!str) aargh("malloc"); |
121 | line= (logline*)str; |
122 | line->next= NULL; |
123 | line->start= str+sizeof(logline); |
124 | strcpy(line->start, buf); |
940356bd |
125 | str = ipaddr2domain(line->start, &line->addr, &line->rest); |
126 | if (opts & OPT_DEBUG) |
127 | fprintf(stderr, "%s: adns_submit %s\n", progname, str); |
81453aec |
128 | if (adns_submit(adns, str, adns_r_ptr, |
129 | adns_qf_quoteok_cname|adns_qf_cname_loose, |
130 | NULL, &line->query)) |
131 | aargh("adns_submit"); |
132 | return line; |
133 | } |
134 | if (!feof(stdin)) |
135 | aargh("fgets"); |
136 | return NULL; |
137 | } |
138 | |
940356bd |
139 | static void proclog(int opts) { |
81453aec |
140 | int eof, err, len; |
141 | adns_state adns; |
142 | adns_answer *answer; |
143 | logline *head, *tail, *line; |
144 | |
940356bd |
145 | errno= adns_init(&adns, (opts & OPT_DEBUG) ? adns_if_debug : 0, 0); |
81453aec |
146 | if (errno) aargh("adns_init"); |
940356bd |
147 | head= tail= readline(adns, opts); |
81453aec |
148 | len= 1; eof= 0; |
149 | while (head) { |
150 | if (eof || len > MAXPENDING) |
940356bd |
151 | if (opts & OPT_POLL) |
152 | err= adns_wait_poll(adns, &head->query, &answer, NULL); |
153 | else |
154 | err= adns_wait(adns, &head->query, &answer, NULL); |
81453aec |
155 | else |
156 | err= adns_check(adns, &head->query, &answer, NULL); |
157 | if (err != EWOULDBLOCK) { |
158 | printline(head->start, head->addr, head->rest, |
159 | answer->status == adns_s_ok ? *answer->rrs.str : NULL); |
160 | line= head; head= head->next; |
161 | free(line); free(answer); |
162 | len--; |
163 | } |
164 | if (!eof) { |
940356bd |
165 | line= readline(adns, opts); |
81453aec |
166 | if (!line) |
167 | eof= 1; |
168 | else { |
169 | if (!head) |
170 | head = line; |
171 | else |
172 | tail->next = line; |
173 | tail = line; |
174 | len++; |
175 | } |
176 | } |
177 | } |
178 | adns_finish(adns); |
179 | } |
180 | |
23d78b27 |
181 | int main(int argc, char *argv[]) { |
940356bd |
182 | int c, opts; |
183 | |
81453aec |
184 | progname= *argv; |
940356bd |
185 | opts= 0; |
186 | |
187 | while ((c= getopt(argc, argv, "dp")) != -1) { |
188 | switch (c) { |
189 | case 'd': |
190 | opts |= OPT_DEBUG; |
191 | break; |
192 | case 'p': |
193 | opts |= OPT_POLL; |
194 | break; |
195 | default: |
196 | fprintf(stderr, "usage: %s [-d] < logfile\n", progname); |
197 | exit(1); |
198 | } |
199 | argc-= optind; |
200 | argv+= optind; |
201 | } |
202 | |
203 | proclog(opts); |
204 | |
23d78b27 |
205 | if (fclose(stdout)) aargh("finish writing output"); |
81453aec |
206 | return 0; |
207 | } |