3 * - a replacement for the Apache logresolve program using adns
7 * Copyright (C) 1999 Tony Finch <dot@dotat.at>
8 * Copyright (C) 1999 Ian Jackson <ian@davenant.greenend.org.uk>
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>
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.
32 static const char * const cvsid =
33 "$Id: adnslogres.c,v 1.6 1999/10/15 16:43:23 ian Exp $";
35 #include <sys/types.h>
47 /* maximum number of concurrent DNS queries */
48 #define MAXPENDING 1000
50 /* maximum length of a line */
57 static const char *progname;
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);
66 * Parse the IP address and convert to a reverse domain name.
68 static char *ipaddr2domain(char *start, char **addr, char **rest) {
69 static char buf[30]; /* "123.123.123.123.in-addr.arpa.\0" */
75 while (!isdigit(*ptrs[0]))
77 strcpy(buf, "invalid.");
81 for (i= 1; i < 5; i++) {
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)) {
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]);
101 static void printline(FILE *outf, char *start, char *addr, char *rest, char *domain) {
103 fprintf(outf, "%.*s%s%s", addr - start, start, domain, rest);
106 if (ferror(outf)) aargh("write output");
109 typedef struct logline {
110 struct logline *next;
111 char *start, *addr, *rest;
115 static logline *readline(FILE *inf, adns_state adns, int opts) {
116 static char buf[MAXLINE];
120 if (fgets(buf, MAXLINE, inf)) {
121 str= malloc(sizeof(*line) + strlen(buf) + 1);
122 if (!str) aargh("malloc");
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,
133 aargh("adns_submit");
141 static void proclog(FILE *inf, FILE *outf, int opts) {
145 logline *head, *tail, *line;
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);
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)
157 err= adns_wait_poll(adns, &head->query, &answer, NULL);
159 err= adns_wait(adns, &head->query, &answer, NULL);
161 err= adns_check(adns, &head->query, &answer, NULL);
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);
170 line= readline(inf, adns, opts);
186 static void usage(void) {
187 fprintf(stderr, "usage: %s [-d] [-p] [logfile]\n", progname);
191 int main(int argc, char *argv[]) {
195 progname= strrchr(*argv, '/');
202 while ((c= getopt(argc, argv, "dp")) != -1)
221 inf= fopen(*argv, "r");
226 aargh("couldn't open input");
228 proclog(inf, stdout, opts);
231 aargh("fclose input");
233 aargh("fclose output");