httpd/support/logresolve.c

	logresolve.c revision 842ae4bd224140319ae7feec1872b93dfd491143
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding/* Licensed to the Apache Software Foundation (ASF) under one or more
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * contributor license agreements.  See the NOTICE file distributed with
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * this work for additional information regarding copyright ownership.
b99dbaab171d91e1b664397cc40e039d0c087c65fielding * The ASF licenses this file to You under the Apache License, Version 2.0
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * (the "License"); you may not use this file except in compliance with
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * the License.  You may obtain a copy of the License at
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding *
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding *     http://www.apache.org/licenses/LICENSE-2.0
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding *
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * Unless required by applicable law or agreed to in writing, software
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * distributed under the License is distributed on an "AS IS" BASIS,
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * See the License for the specific language governing permissions and
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * limitations under the License.
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding */
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding/*
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * logresolve 2.0
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding *
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * Tom Rathborne - tomr uunet.ca - http://www.uunet.ca/~tomr/
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * UUNET Canada, April 16, 1995
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding *
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * Rewritten by David Robinson. (drtr ast.cam.ac.uk)
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * Rewritten again, and ported to APR by Colm MacCarthaigh
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding *
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * Usage: logresolve [-s filename] [-c] < access_log > new_log
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding *
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * Arguments:
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding *    -s filename     name of a file to record statistics
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding *    -c              check the DNS for a matching A record for the host.
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding *
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * Notes:             (For historical interest)
64185f9824e42f21ca7b9ae6c004484215c031a7rbb *
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * To generate meaningful statistics from an HTTPD log file, it's good
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * to have the domain name of each machine that accessed your site, but
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * doing this on the fly can slow HTTPD down.
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding *
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * Compiling NCSA HTTPD with the -DMINIMAL_DNS flag turns IP#->hostname
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * resolution off. Before running your stats program, just run your log
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * file through this program (logresolve) and all of your IP numbers will
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * be resolved into hostnames (where possible).
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding *
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * logresolve takes an HTTPD access log (in the COMMON log file format,
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * or any other format that has the IP number/domain name as the first
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * field for that matter), and outputs the same file with all of the
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * domain names looked up. Where no domain name can be found, the IP
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * number is left in.
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding *
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * To minimize impact on your nameserver, logresolve has its very own
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * internal hash-table cache. This means that each IP number will only
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * be looked up the first time it is found in the log file.
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding *
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * The -c option causes logresolve to apply the same check as httpd
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * compiled with -DMAXIMUM_DNS; after finding the hostname from the IP
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * address, it looks up the IP addresses for the hostname and checks
ab2c1c1c83ec91415565da5a71fbc15d9685caa6fielding * that one of these matches the original address.
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding */
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#include "apr.h"
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#include "apr_lib.h"
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#include "apr_hash.h"
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#include "apr_getopt.h"
ba4c566c200c2436dae841b7c811807c80cd712afielding#include "apr_strings.h"
ba4c566c200c2436dae841b7c811807c80cd712afielding#include "apr_file_io.h"
ba4c566c200c2436dae841b7c811807c80cd712afielding#include "apr_network_io.h"
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#if APR_HAVE_STDLIB_H
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#include <stdlib.h>
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#endif
ba4c566c200c2436dae841b7c811807c80cd712afielding
ba4c566c200c2436dae841b7c811807c80cd712afieldingstatic apr_file_t *errfile;
0f081398cf0eef8cc7c66a535d450110a92dc8aefieldingstatic const char *shortname = "logresolve";
0f081398cf0eef8cc7c66a535d450110a92dc8aefieldingstatic apr_hash_t *cache;
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding/* Statistics */
0f081398cf0eef8cc7c66a535d450110a92dc8aefieldingstatic int cachehits = 0;
0f081398cf0eef8cc7c66a535d450110a92dc8aefieldingstatic int cachesize = 0;
0f081398cf0eef8cc7c66a535d450110a92dc8aefieldingstatic int entries = 0;
0f081398cf0eef8cc7c66a535d450110a92dc8aefieldingstatic int resolves = 0;
0f081398cf0eef8cc7c66a535d450110a92dc8aefieldingstatic int withname = 0;
0f081398cf0eef8cc7c66a535d450110a92dc8aefieldingstatic int doublefailed = 0;
0f081398cf0eef8cc7c66a535d450110a92dc8aefieldingstatic int noreverse = 0;
ba4c566c200c2436dae841b7c811807c80cd712afielding
ba4c566c200c2436dae841b7c811807c80cd712afielding/*
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * prints various statistics to output
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding */
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#define NL APR_EOL_STR
0f081398cf0eef8cc7c66a535d450110a92dc8aefieldingstatic void print_statistics (apr_file_t *output)
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding{
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    apr_file_printf(output, "logresolve Statistics:" NL);
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    apr_file_printf(output, "Entries: %d" NL, entries);
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    apr_file_printf(output, "    With name   : %d" NL, withname);
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    apr_file_printf(output, "    Resolves    : %d" NL, resolves);
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding
ba4c566c200c2436dae841b7c811807c80cd712afielding    if (noreverse) {
ba4c566c200c2436dae841b7c811807c80cd712afielding        apr_file_printf(output, "    - No reverse : %d" NL,
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding                        noreverse);
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    }
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    if (doublefailed) {
ba4c566c200c2436dae841b7c811807c80cd712afielding        apr_file_printf(output, "    - Double lookup failed : %d" NL,
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding                        doublefailed);
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    }
ba4c566c200c2436dae841b7c811807c80cd712afielding
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    apr_file_printf(output, "Cache hits      : %d" NL, cachehits);
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    apr_file_printf(output, "Cache size      : %d" NL, cachesize);
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding}
024cd9589e52cf11ce765dfddb5b5f0c6e421a48gstein
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard/*
0d496deee49b66bb43883640fa9c1a7e884a1b8ctrawick * usage info
ea92d0ffcb30b186010a2c8ca2c80d2ac09e34dastoddard */
024cd9589e52cf11ce765dfddb5b5f0c6e421a48gsteinstatic void usage(void)
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard{
024cd9589e52cf11ce765dfddb5b5f0c6e421a48gstein    apr_file_printf(errfile,
024cd9589e52cf11ce765dfddb5b5f0c6e421a48gstein    "%s -- Resolve IP-addresses to hostnames in Apache log files."           NL
024cd9589e52cf11ce765dfddb5b5f0c6e421a48gstein    "Usage: %s [-s STATFILE] [-c]"                                           NL
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding                                                                             NL
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    "Options:"                                                               NL
4cff088e460b3832142e59c63b357f8cf4d77fa8ake    "  -s   Record statistics to STATFILE when finished."                    NL
ea92d0ffcb30b186010a2c8ca2c80d2ac09e34dastoddard                                                                             NL
ea92d0ffcb30b186010a2c8ca2c80d2ac09e34dastoddard    "  -c   Perform double lookups when resolving IP addresses."            NL,
5fac45c1ef49924141fe28497deb350cf031b377trawick    shortname, shortname);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    exit(1);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard}
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard#undef NL
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding
0f081398cf0eef8cc7c66a535d450110a92dc8aefieldingint main(int argc, const char * const argv[])
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding{
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    apr_file_t * outfile;
3bc407b46a67691f3e5fd4f5f5ead4e1eff09998stoddard    apr_file_t * infile;
3bc407b46a67691f3e5fd4f5f5ead4e1eff09998stoddard    apr_file_t * statsfile;
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    apr_sockaddr_t * ip;
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    apr_sockaddr_t * ipdouble;
ea92d0ffcb30b186010a2c8ca2c80d2ac09e34dastoddard    apr_getopt_t * o;
ba4c566c200c2436dae841b7c811807c80cd712afielding    apr_pool_t * pool;
930c6aa533c52bc67fd15f0f89551255b1bfdaf1trawick    apr_status_t status;
ea92d0ffcb30b186010a2c8ca2c80d2ac09e34dastoddard    const char * arg;
ea92d0ffcb30b186010a2c8ca2c80d2ac09e34dastoddard    char opt;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    char * stats = NULL;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    char * space;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    char * hostname;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard#if APR_MAJOR_VERSION > 1 || (APR_MAJOR_VERSION == 1 && APR_MINOR_VERSION >= 3)
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    char * inbuffer;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    char * outbuffer;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard#endif
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    char line[2048];
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    int doublelookups = 0;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    if (apr_app_initialize(&argc, &argv, NULL) != APR_SUCCESS) {
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        return 1;
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    }
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    atexit(apr_terminate);
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    if (argc) {
3bc407b46a67691f3e5fd4f5f5ead4e1eff09998stoddard        shortname = apr_filepath_name_get(argv[0]);
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    }
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    if (apr_pool_create(&pool, NULL) != APR_SUCCESS) {
3bc407b46a67691f3e5fd4f5f5ead4e1eff09998stoddard        return 1;
3bc407b46a67691f3e5fd4f5f5ead4e1eff09998stoddard    }
3bc407b46a67691f3e5fd4f5f5ead4e1eff09998stoddard    apr_file_open_stderr(&errfile, pool);
3bc407b46a67691f3e5fd4f5f5ead4e1eff09998stoddard    apr_getopt_init(&o, pool, argc, argv);
3bc407b46a67691f3e5fd4f5f5ead4e1eff09998stoddard
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    while (1) {
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding        status = apr_getopt(o, "s:c", &opt, &arg);
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding        if (status == APR_EOF) {
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding            break;
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding        }
ea92d0ffcb30b186010a2c8ca2c80d2ac09e34dastoddard        else if (status != APR_SUCCESS) {
ea92d0ffcb30b186010a2c8ca2c80d2ac09e34dastoddard            usage();
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding        }
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding        else {
3d96ee83babeec32482c9082c9426340cee8c44dwrowe            switch (opt) {
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding            case 'c':
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                if (doublelookups) {
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                    usage();
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                }
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                doublelookups = 1;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                break;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            case 's':
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                if (stats) {
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                    usage();
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                }
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                stats = apr_pstrdup(pool, arg);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                break;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            } /* switch */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        } /* else */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    } /* while */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    apr_file_open_stdout(&outfile, pool);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    apr_file_open_stdin(&infile, pool);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard#if APR_MAJOR_VERSION > 1 || (APR_MAJOR_VERSION == 1 && APR_MINOR_VERSION >= 3)
1ccd992d37d62c8cb2056126f2234f64ec189bfddougm    /* Allocate two new 10k file buffers */
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    if ((outbuffer = apr_palloc(pool, 10240)) == NULL ||
a6b9ed64fdf548c61de9714e2cfb999ec59d149cgstein        (inbuffer = apr_palloc(pool, 10240)) == NULL) {
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding        return 1;
ea92d0ffcb30b186010a2c8ca2c80d2ac09e34dastoddard    }
ea92d0ffcb30b186010a2c8ca2c80d2ac09e34dastoddard
a6b9ed64fdf548c61de9714e2cfb999ec59d149cgstein    /* Set the buffers */
a6b9ed64fdf548c61de9714e2cfb999ec59d149cgstein    apr_file_buffer_set(infile, inbuffer, 10240);
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    apr_file_buffer_set(outfile, outbuffer, 10240);
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#endif
1ccd992d37d62c8cb2056126f2234f64ec189bfddougm
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    cache = apr_hash_make(pool);
a6b9ed64fdf548c61de9714e2cfb999ec59d149cgstein
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding    while (apr_file_gets(line, 2048, infile) == APR_SUCCESS) {
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding        if (line[0] == '\0') {
1ccd992d37d62c8cb2056126f2234f64ec189bfddougm            continue;
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding        }
a6b9ed64fdf548c61de9714e2cfb999ec59d149cgstein
a6b9ed64fdf548c61de9714e2cfb999ec59d149cgstein        /* Count our log entries */
a6b9ed64fdf548c61de9714e2cfb999ec59d149cgstein        entries++;
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding
ea92d0ffcb30b186010a2c8ca2c80d2ac09e34dastoddard        /* Check if this could even be an IP address */
ea92d0ffcb30b186010a2c8ca2c80d2ac09e34dastoddard        if (!apr_isxdigit(line[0]) && line[0] != ':') {
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding                withname++;
a6b9ed64fdf548c61de9714e2cfb999ec59d149cgstein            apr_file_puts(line, outfile);
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding            continue;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        }
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        /* Terminate the line at the next space */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        if ((space = strchr(line, ' ')) != NULL) {
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            *space = '\0';
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        }
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        /* See if we have it in our cache */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        hostname = (char *) apr_hash_get(cache, line, APR_HASH_KEY_STRING);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        if (hostname) {
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            apr_file_printf(outfile, "%s %s", hostname, space + 1);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                cachehits++;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            continue;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        }
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        /* Parse the IP address */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        status = apr_sockaddr_info_get(&ip, line, APR_UNSPEC ,0, 0, pool);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        if (status != APR_SUCCESS) {
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            /* Not an IP address */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                withname++;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            *space = ' ';
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            apr_file_puts(line, outfile);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            continue;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        }
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        /* This does not make much sense, but historically "resolves" means
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard         * "parsed as an IP address". It does not mean we actually resolved
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard         * the IP address into a hostname.
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard         */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            resolves++;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        /* From here on our we cache each result, even if it was not
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard         * succesful
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard         */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        cachesize++;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        /* Try and perform a reverse lookup */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        status = apr_getnameinfo(&hostname, ip, 0) != APR_SUCCESS;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        if (status || hostname == NULL) {
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            /* Could not perform a reverse lookup */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            *space = ' ';
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            apr_file_puts(line, outfile);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            noreverse++;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            /* Add to cache */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            *space = '\0';
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            apr_hash_set(cache, line, APR_HASH_KEY_STRING,
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                         apr_pstrdup(pool, line));
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            continue;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        }
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        /* Perform a double lookup */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        if (doublelookups) {
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            /* Do a forward lookup on our hostname, and see if that matches our
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard             * original IP address.
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard             */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            status = apr_sockaddr_info_get(&ipdouble, hostname, ip->family, 0,
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                                           0, pool);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            if (status == APR_SUCCESS ||
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                memcmp(ipdouble->ipaddr_ptr, ip->ipaddr_ptr, ip->ipaddr_len)) {
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                /* Double-lookup failed  */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                *space = ' ';
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                apr_file_puts(line, outfile);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                doublefailed++;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding                /* Add to cache */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                *space = '\0';
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                apr_hash_set(cache, line, APR_HASH_KEY_STRING,
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                             apr_pstrdup(pool, line));
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                continue;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            }
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        }
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        /* Outout the resolved name */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        apr_file_printf(outfile, "%s %s", hostname, space + 1);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        /* Store it in the cache */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        apr_hash_set(cache, line, APR_HASH_KEY_STRING,
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                     apr_pstrdup(pool, hostname));
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    }
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    /* Flush any remaining output */
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    apr_file_flush(outfile);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    if (stats) {
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        if (apr_file_open(&statsfile, stats,
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                       APR_FOPEN_WRITE | APR_FOPEN_CREATE | APR_FOPEN_TRUNCATE,
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                          APR_OS_DEFAULT, pool) != APR_SUCCESS) {
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            apr_file_printf(errfile, "%s: Could not open %s for writing.",
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard                            shortname, stats);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard            return 1;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        }
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        print_statistics(statsfile);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard        apr_file_close(statsfile);
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    }
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard    return 0;
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard}
fd0075570654d8f3473f12c47f507c8b3c59a8e4stoddard