81453aec |
1 | /* |
2 | * adnslogres.c |
3 | * - a replacement for the Apache logresolve program using adns |
4 | */ |
5 | /* |
6 | * This file is Copyright (C) 1999 Tony Finch <fanf@demon.net> <dot@dotat.at> |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by |
10 | * the Free Software Foundation; either version 2, or (at your option) |
11 | * any later version. |
12 | * |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | * GNU General Public License for more details. |
17 | * |
18 | * You should have received a copy of the GNU General Public License |
19 | * along with this program; if not, write to the Free Software Foundation, |
20 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
21 | */ |
22 | |
23 | static const char * const cvsid = |
24 | "$Id$"; |
25 | |
26 | #include <sys/types.h> |
27 | #include <sys/time.h> |
28 | |
29 | #include <string.h> |
30 | #include <stdlib.h> |
31 | #include <stdio.h> |
32 | #include <ctype.h> |
33 | #include <errno.h> |
34 | |
35 | #include "adns.h" |
36 | |
37 | /* maximum number of concurrent DNS queries */ |
38 | #define MAXPENDING 1000 |
39 | |
40 | /* maximum length of a line */ |
41 | #define MAXLINE 1024 |
42 | |
43 | static const char *progname; |
44 | |
45 | static void aargh(const char *msg) { |
46 | fprintf(stderr, "%s: %s: %s (%d)\n", progname, msg, |
47 | strerror(errno) ? strerror(errno) : "Unknown error", errno); |
48 | exit(1); |
49 | } |
50 | |
51 | /* |
52 | * Parse the IP address and convert to a reverse domain name. |
53 | */ |
54 | static void ipaddr2domain(char *start, char **addr, char **rest, char **domain) { |
55 | static char buf[30]; /* "123.123.123.123.in-addr.arpa.\0" */ |
56 | char *ptrs[5]; |
57 | int i; |
58 | |
59 | for (ptrs[0]= start; !isdigit(*ptrs[0]); ptrs[0]++) |
60 | if (!*ptrs[0]) |
61 | goto invalid; |
62 | for (i= 1; i < 5; i ++) { |
63 | ptrs[i]= strchr(ptrs[i-1], (i == 4) ? ' ' : '.'); |
64 | if (!ptrs[i] || ptrs[i]-ptrs[i-1] > 3) |
65 | goto invalid; |
66 | else |
67 | ptrs[i]++; |
68 | } |
69 | sprintf(buf, "%.*s.%.*s.%.*s.%.*s.in-addr.arpa.", |
70 | ptrs[4]-ptrs[3]-1, ptrs[3], |
71 | ptrs[3]-ptrs[2]-1, ptrs[2], |
72 | ptrs[2]-ptrs[1]-1, ptrs[1], |
73 | ptrs[1]-ptrs[0]-1, ptrs[0]); |
74 | *addr= ptrs[0]; |
75 | *rest= ptrs[4]-1; |
76 | *domain= buf; |
77 | return; |
78 | invalid: |
79 | strcpy(buf, "invalid."); |
80 | *addr= *rest= NULL; |
81 | *domain= buf; |
82 | return; |
83 | } |
84 | |
85 | static void printline(char *start, char *addr, char *rest, char *domain) { |
86 | if (domain) |
87 | printf("%.*s%s%s", addr - start, start, domain, rest); |
88 | else |
89 | fputs(start, stdout); |
90 | /* XXX: error checking */ |
91 | } |
92 | |
93 | typedef struct logline { |
94 | struct logline *next; |
95 | char *start, *addr, *rest; |
96 | adns_query query; |
97 | } logline; |
98 | |
99 | static logline *readline(adns_state adns) { |
100 | static char buf[MAXLINE]; |
101 | char *str; |
102 | logline *line; |
103 | |
104 | if (fgets(buf, MAXLINE, stdin)) { |
105 | str= malloc(sizeof(*line) + strlen(buf) + 1); |
106 | if (!str) aargh("malloc"); |
107 | line= (logline*)str; |
108 | line->next= NULL; |
109 | line->start= str+sizeof(logline); |
110 | strcpy(line->start, buf); |
111 | ipaddr2domain(line->start, &line->addr, &line->rest, &str); |
112 | if (adns_submit(adns, str, adns_r_ptr, |
113 | adns_qf_quoteok_cname|adns_qf_cname_loose, |
114 | NULL, &line->query)) |
115 | aargh("adns_submit"); |
116 | return line; |
117 | } |
118 | if (!feof(stdin)) |
119 | aargh("fgets"); |
120 | return NULL; |
121 | } |
122 | |
123 | static void proclog(void) { |
124 | int eof, err, len; |
125 | adns_state adns; |
126 | adns_answer *answer; |
127 | logline *head, *tail, *line; |
128 | |
129 | errno= adns_init(&adns, 0, 0); |
130 | if (errno) aargh("adns_init"); |
131 | head= tail= readline(adns); |
132 | len= 1; eof= 0; |
133 | while (head) { |
134 | if (eof || len > MAXPENDING) |
135 | err= adns_wait(adns, &head->query, &answer, NULL); |
136 | else |
137 | err= adns_check(adns, &head->query, &answer, NULL); |
138 | if (err != EWOULDBLOCK) { |
139 | printline(head->start, head->addr, head->rest, |
140 | answer->status == adns_s_ok ? *answer->rrs.str : NULL); |
141 | line= head; head= head->next; |
142 | free(line); free(answer); |
143 | len--; |
144 | } |
145 | if (!eof) { |
146 | line= readline(adns); |
147 | if (!line) |
148 | eof= 1; |
149 | else { |
150 | if (!head) |
151 | head = line; |
152 | else |
153 | tail->next = line; |
154 | tail = line; |
155 | len++; |
156 | } |
157 | } |
158 | } |
159 | adns_finish(adns); |
160 | } |
161 | |
162 | int main(int argc, char *argv[]) |
163 | { |
164 | progname= *argv; |
165 | proclog(); |
166 | return 0; |
167 | } |