3 * - a replacement for the Apache logresolve program using adns
7 * Copyright (C) 1999 Tony Finch <dot@dotat.at>
8 * Copyright (C) 1999-2000 Ian Jackson <ian@davenant.greenend.org.uk>
10 * It is part of adns, which is
11 * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
12 * Copyright (C) 1999 Tony Finch <dot@dotat.at>
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)
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.
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.
28 * This version was originally supplied by Tony Finch, but has been
29 * modified by Ian Jackson as it was incorporated into adns and
33 static const char * const cvsid =
36 #include <sys/types.h>
50 /* maximum number of concurrent DNS queries */
51 #define MAXPENDING 1000
53 /* maximum length of a line */
60 static const char *progname;
62 #define guard_null(str) ((str) ? (str) : "")
64 #define sensible_ctype(type,ch) (type((unsigned char)(ch)))
65 /* isfoo() functions from ctype.h can't safely be fed char - blech ! */
67 static void msg(const char *fmt, ...) {
70 fprintf(stderr, "%s: ", progname);
72 vfprintf(stderr, fmt, al);
77 static void aargh(const char *cause) {
78 const char *why = strerror(errno);
79 if (!why) why = "Unknown error";
80 msg("%s: %s (%d)", cause, why, errno);
85 * Parse the IP address and convert to a reverse domain name.
87 static char *ipaddr2domain(char *start, char **addr, char **rest) {
88 static char buf[30]; /* "123.123.123.123.in-addr.arpa.\0" */
94 while (!sensible_ctype(isdigit,*ptrs[0]))
96 strcpy(buf, "invalid.");
100 for (i= 1; i < 5; i++) {
102 while (sensible_ctype(isdigit,*ptrs[i]++));
103 if ((i == 4 && !sensible_ctype(isspace,ptrs[i][-1])) ||
104 (i != 4 && ptrs[i][-1] != '.') ||
105 (ptrs[i]-ptrs[i-1] > 4)) {
110 sprintf(buf, "%.*s.%.*s.%.*s.%.*s.in-addr.arpa.",
111 ptrs[4]-ptrs[3]-1, ptrs[3],
112 ptrs[3]-ptrs[2]-1, ptrs[2],
113 ptrs[2]-ptrs[1]-1, ptrs[1],
114 ptrs[1]-ptrs[0]-1, ptrs[0]);
120 static void printline(FILE *outf, char *start, char *addr, char *rest, char *domain) {
122 fprintf(outf, "%.*s%s%s", addr - start, start, domain, rest);
125 if (ferror(outf)) aargh("write output");
128 typedef struct logline {
129 struct logline *next;
130 char *start, *addr, *rest;
134 static logline *readline(FILE *inf, adns_state adns, int opts) {
135 static char buf[MAXLINE];
139 if (fgets(buf, MAXLINE, inf)) {
140 str= malloc(sizeof(*line) + strlen(buf) + 1);
141 if (!str) aargh("malloc");
144 line->start= str+sizeof(logline);
145 strcpy(line->start, buf);
146 str= ipaddr2domain(line->start, &line->addr, &line->rest);
147 if (opts & OPT_DEBUG)
148 msg("submitting %.*s -> %s", line->rest-line->addr, guard_null(line->addr), str);
149 if (adns_submit(adns, str, adns_r_ptr,
150 adns_qf_quoteok_cname|adns_qf_cname_loose,
152 aargh("adns_submit");
160 static void proclog(FILE *inf, FILE *outf, int opts) {
164 logline *head, *tail, *line;
166 errno= adns_init(&adns, (opts & OPT_DEBUG) ? adns_if_debug : 0, 0);
167 if (errno) aargh("adns_init");
168 head= tail= readline(inf, adns, opts);
171 if (opts & OPT_DEBUG)
172 msg("%d in queue; checking %.*s", len,
173 head->rest-head->addr, guard_null(head->addr));
174 if (eof || len > MAXPENDING) {
176 err= adns_wait_poll(adns, &head->query, &answer, NULL);
178 err= adns_wait(adns, &head->query, &answer, NULL);
180 err= adns_check(adns, &head->query, &answer, NULL);
183 printline(outf, head->start, head->addr, head->rest,
184 answer->status == adns_s_ok ? *answer->rrs.str : NULL);
185 line= head; head= head->next;
186 free(line); free(answer);
190 line= readline(inf, adns, opts);
206 static void usage(void) {
207 fprintf(stderr, "usage: %s [-d] [-p] [logfile]\n", progname);
211 int main(int argc, char *argv[]) {
215 progname= strrchr(*argv, '/');
222 while ((c= getopt(argc, argv, "dp")) != -1)
241 inf= fopen(*argv, "r");
246 aargh("couldn't open input");
248 proclog(inf, stdout, opts);
251 aargh("fclose input");
253 aargh("fclose output");