httpd/support/logresolve.c

	logresolve.c revision 0b4b04d8621478ba59f0a6ba2950ddc02ab92b58
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin/* Copyright 1999-2005 The Apache Software Foundation or its licensors, as
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * applicable.
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * Licensed under the Apache License, Version 2.0 (the "License");
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * you may not use this file except in compliance with the License.
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * You may obtain a copy of the License at
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *     http://www.apache.org/licenses/LICENSE-2.0
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * Unless required by applicable law or agreed to in writing, software
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * distributed under the License is distributed on an "AS IS" BASIS,
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * See the License for the specific language governing permissions and
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * limitations under the License.
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin/*
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * logresolve 2.0
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * Tom Rathborne - tomr uunet.ca - http://www.uunet.ca/~tomr/
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * UUNET Canada, April 16, 1995
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * Rewritten by David Robinson. (drtr ast.cam.ac.uk)
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * Rewritten again, and ported to APR by Colm MacCarthaigh
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * Usage: logresolve [-s filename] [-c] < access_log > new_log
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * Arguments:
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *    -s filename     name of a file to record statistics
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *    -c              check the DNS for a matching A record for the host.
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * Notes:             (For historical interest)
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * To generate meaningful statistics from an HTTPD log file, it's good
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * to have the domain name of each machine that accessed your site, but
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * doing this on the fly can slow HTTPD down.
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * Compiling NCSA HTTPD with the -DMINIMAL_DNS flag turns IP#->hostname
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * resolution off. Before running your stats program, just run your log
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * file through this program (logresolve) and all of your IP numbers will
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * be resolved into hostnames (where possible).
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * logresolve takes an HTTPD access log (in the COMMON log file format,
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * or any other format that has the IP number/domain name as the first
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * field for that matter), and outputs the same file with all of the
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * domain names looked up. Where no domain name can be found, the IP
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * number is left in.
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * To minimize impact on your nameserver, logresolve has its very own
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * internal hash-table cache. This means that each IP number will only
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * be looked up the first time it is found in the log file.
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin *
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * The -c option causes logresolve to apply the same check as httpd
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * compiled with -DMAXIMUM_DNS; after finding the hostname from the IP
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * address, it looks up the IP addresses for the hostname and checks
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * that one of these matches the original address.
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#include "apr.h"
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#include "apr_lib.h"
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#include "apr_hash.h"
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#include "apr_getopt.h"
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#include "apr_strings.h"
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#include "apr_file_io.h"
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#include "apr_network_io.h"
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#if APR_HAVE_STDLIB_H
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#include <stdlib.h>
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#endif
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrinstatic apr_file_t *errfile;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrinstatic const char *shortname = "logresolve";
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrinstatic apr_hash_t *cache;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin/* Statistics */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrinstatic int cachehits = 0;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrinstatic int cachesize = 0;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrinstatic int entries = 0;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrinstatic int resolves = 0;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrinstatic int withname = 0;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrinstatic int doublefailed = 0;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrinstatic int noreverse = 0;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin/*
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * prints various statistics to output
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#define NL APR_EOL_STR
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrinstatic void print_statistics (apr_file_t *output)
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin{
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_printf(output, "logresolve Statistics:" NL);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_printf(output, "Entries: %d" NL, entries);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_printf(output, "    With name   : %d" NL, withname);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_printf(output, "    Resolves    : %d" NL, resolves);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    if (noreverse) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        apr_file_printf(output, "    - No reverse : %d" NL,
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                        noreverse);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    if (doublefailed) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        apr_file_printf(output, "    - Double lookup failed : %d" NL,
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                        doublefailed);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_printf(output, "Cache hits      : %d" NL, cachehits);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_printf(output, "Cache size      : %d" NL, cachesize);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin}
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin/*
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin * usage info
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrinstatic void usage(void)
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin{
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_printf(errfile,
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    "%s -- Resolve IP-addresses to hostnames in Apache log files."           NL
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    "Usage: %s [-s STATFILE] [-c]"                                           NL
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                                                                             NL
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    "Options:"                                                               NL
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    "  -s   Record statistics to STATFILE when finished."                    NL
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                                                                             NL
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    "  -c   Perform double lookups when resolving IP addresses."            NL,
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    shortname, shortname);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    exit(1);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin}
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#undef NL
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrinint main(int argc, const char * const argv[])
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin{
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_t         * outfile;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_t         * infile;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_t         * statsfile;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_sockaddr_t     * ip;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_sockaddr_t     * ipdouble;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_getopt_t       * o;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_pool_t         * pool;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_status_t         status;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    const char         * arg;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    char                 opt;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    char               * stats = NULL;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    char               * space;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    char               * hostname;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#if APR_MAJOR_VERSION > 1 || (APR_MAJOR_VERSION == 1 && APR_MINOR_VERSION >= 3)
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    char               * inbuffer;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    char               * outbuffer;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#endif
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    char                 line[2048];
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    int                  doublelookups = 0;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    if (apr_app_initialize(&argc, &argv, NULL) != APR_SUCCESS) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        return 1;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    atexit(apr_terminate);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    if (argc) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        shortname = apr_filepath_name_get(argv[0]);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    if (apr_pool_create(&pool, NULL) != APR_SUCCESS) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        return 1;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_open_stderr(&errfile, pool);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_getopt_init(&o, pool, argc, argv);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    while (1) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        status = apr_getopt(o, "s:c", &opt, &arg);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        if (status == APR_EOF) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            break;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        else if (status != APR_SUCCESS) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            usage();
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        else {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            switch (opt) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            case 'c':
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                if (doublelookups) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                    usage();
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                doublelookups = 1;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                break;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            case 's':
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                if (stats) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                    usage();
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                stats = apr_pstrdup(pool, arg);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                break;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            } /* switch */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        } /* else */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    } /* while */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_open_stdout(&outfile, pool);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_open_stdin(&infile, pool);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#if APR_MAJOR_VERSION > 1 || (APR_MAJOR_VERSION == 1 && APR_MINOR_VERSION >= 3)
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    /* Allocate two new 10k file buffers */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    if ((outbuffer = apr_palloc(pool, 10240)) == NULL ||
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        (inbuffer = apr_palloc(pool, 10240)) == NULL) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        return 1;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    /* Set the buffers */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_buffer_set(infile, inbuffer, 10240);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_buffer_set(outfile, outbuffer, 10240);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin#endif
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    cache = apr_hash_make(pool);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    while(apr_file_gets(line, 2048, infile) == APR_SUCCESS) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        if (line[0] == '\0') {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            continue;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        /* Count our log entries */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        entries++;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        /* Check if this could even be an IP address */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        if (!apr_isxdigit(line[0]) && line[0] != ':') {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            withname++;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            apr_file_puts(line, outfile);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            continue;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        /* Terminate the line at the next space */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        if((space = strchr(line, ' ')) != NULL) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            *space = '\0';
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        /* See if we have it in our cache */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        hostname = (char *) apr_hash_get(cache, (const void *)line,
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                                         strlen(line));
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        if (hostname) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            apr_file_printf(outfile, "%s %s", hostname, space + 1);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            cachehits++;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            continue;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        /* Parse the IP address */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        status = apr_sockaddr_info_get(&ip, line, APR_UNSPEC ,0, 0, pool);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        if (status != APR_SUCCESS) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            /* Not an IP address */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            withname++;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin           *space = ' ';
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            apr_file_puts(line, outfile);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            continue;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        /* This does not make much sense, but historically "resolves" means
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin         * "parsed as an IP address". It does not mean we actually resolved
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin         * the IP address into a hostname.
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin         */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        resolves++;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        /* From here on our we cache each result, even if it was not
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin         * succesful
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin         */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        cachesize++;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        /* Try and perform a reverse lookup */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        status = apr_getnameinfo(&hostname, ip, 0) != APR_SUCCESS;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        if (status || hostname == NULL) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            /* Could not perform a reverse lookup */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            *space = ' ';
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            apr_file_puts(line, outfile);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            noreverse++;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            /* Add to cache */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            *space = '\0';
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            apr_hash_set(cache, (const void *) line, strlen(line),
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                         (const void *) apr_pstrdup(pool, line));
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            continue;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        /* Perform a double lookup */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        if (doublelookups) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            /* Do a forward lookup on our hostname, and see if that matches our
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin             * original IP address.
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin             */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            status = apr_sockaddr_info_get(&ipdouble, hostname, ip->family, 0,
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                                           0, pool);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            if (status == APR_SUCCESS ||
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                memcmp(ipdouble->ipaddr_ptr, ip->ipaddr_ptr, ip->ipaddr_len)) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                /* Double-lookup failed  */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                *space = ' ';
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                apr_file_puts(line, outfile);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                doublefailed++;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                /* Add to cache */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                *space = '\0';
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                apr_hash_set(cache, (const void *) line, strlen(line),
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                             (const void *) apr_pstrdup(pool, line));
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                continue;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        /* Outout the resolved name */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        apr_file_printf(outfile, "%s %s", hostname, space + 1);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        /* Store it in the cache */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        apr_hash_set(cache, (const void *) line, strlen(line),
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                     (const void *) apr_pstrdup(pool, hostname));
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    /* Flush any remaining output */
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    apr_file_flush(outfile);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    if (stats) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        if (apr_file_open(&statsfile, stats,
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                       APR_FOPEN_WRITE | APR_FOPEN_CREATE | APR_FOPEN_TRUNCATE,
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                          APR_OS_DEFAULT, pool) != APR_SUCCESS) {
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            apr_file_printf(errfile, "%s: Could not open %s for writing.",
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin                            shortname, stats);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin            return 1;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        print_statistics(statsfile);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin        apr_file_close(statsfile);
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    }
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin    return 0;
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin}
fd279fe992f7171dc3f6d4d40d6db5bb74f2d96eminfrin