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 1.5 1999/10/12 22:56:16 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 ++) {
82 ptrs[i]= strchr(ptrs[i-1], (i == 4) ? ' ' : '.');
83 if (!ptrs[i] || ptrs[i]-ptrs[i-1] > 3) {
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]);
99 static void printline(char *start, char *addr, char *rest, char *domain) {
101 printf("%.*s%s%s", addr - start, start, domain, rest);
103 fputs(start, stdout);
104 if (ferror(stdout)) aargh("write output");
107 typedef struct logline {
108 struct logline *next;
109 char *start, *addr, *rest;
113 static logline *readline(adns_state adns, int opts) {
114 static char buf[MAXLINE];
118 if (fgets(buf, MAXLINE, stdin)) {
119 str= malloc(sizeof(*line) + strlen(buf) + 1);
120 if (!str) aargh("malloc");
123 line->start= str+sizeof(logline);
124 strcpy(line->start, buf);
125 str = ipaddr2domain(line->start, &line->addr, &line->rest);
126 if (opts & OPT_DEBUG)
127 fprintf(stderr, "%s: adns_submit %s\n", progname, str);
128 if (adns_submit(adns, str, adns_r_ptr,
129 adns_qf_quoteok_cname|adns_qf_cname_loose,
131 aargh("adns_submit");
139 static void proclog(int opts) {
143 logline *head, *tail, *line;
145 errno= adns_init(&adns, (opts & OPT_DEBUG) ? adns_if_debug : 0, 0);
146 if (errno) aargh("adns_init");
147 head= tail= readline(adns, opts);
150 if (eof || len > MAXPENDING)
152 err= adns_wait_poll(adns, &head->query, &answer, NULL);
154 err= adns_wait(adns, &head->query, &answer, NULL);
156 err= adns_check(adns, &head->query, &answer, NULL);
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);
165 line= readline(adns, opts);
181 int main(int argc, char *argv[]) {
187 while ((c= getopt(argc, argv, "dp")) != -1) {
196 fprintf(stderr, "usage: %s [-d] < logfile\n", progname);
205 if (fclose(stdout)) aargh("finish writing output");