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
=
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");