diff options
Diffstat (limited to 'rubbos/app/httpd-2.0.64/support/logresolve.c')
| -rw-r--r-- | rubbos/app/httpd-2.0.64/support/logresolve.c | 400 |
1 files changed, 400 insertions, 0 deletions
diff --git a/rubbos/app/httpd-2.0.64/support/logresolve.c b/rubbos/app/httpd-2.0.64/support/logresolve.c new file mode 100644 index 00000000..c606039b --- /dev/null +++ b/rubbos/app/httpd-2.0.64/support/logresolve.c @@ -0,0 +1,400 @@ +/* Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/* + * logresolve 1.1 + * + * Tom Rathborne - tomr@uunet.ca - http://www.uunet.ca/~tomr/ + * UUNET Canada, April 16, 1995 + * + * Rewritten by David Robinson. (drtr ast.cam.ac.uk) + * + * Usage: logresolve [-s filename] [-c] < access_log > new_log + * + * Arguments: + * -s filename name of a file to record statistics + * -c check the DNS for a matching A record for the host. + * + * Notes: + * + * To generate meaningful statistics from an HTTPD log file, it's good + * to have the domain name of each machine that accessed your site, but + * doing this on the fly can slow HTTPD down. + * + * Compiling NCSA HTTPD with the -DMINIMAL_DNS flag turns IP#->hostname + * resolution off. Before running your stats program, just run your log + * file through this program (logresolve) and all of your IP numbers will + * be resolved into hostnames (where possible). + * + * logresolve takes an HTTPD access log (in the COMMON log file format, + * or any other format that has the IP number/domain name as the first + * field for that matter), and outputs the same file with all of the + * domain names looked up. Where no domain name can be found, the IP + * number is left in. + * + * To minimize impact on your nameserver, logresolve has its very own + * internal hash-table cache. This means that each IP number will only + * be looked up the first time it is found in the log file. + * + * The -c option causes logresolve to apply the same check as httpd + * compiled with -DMAXIMUM_DNS; after finding the hostname from the IP + * address, it looks up the IP addresses for the hostname and checks + * that one of these matches the original address. + */ + +#include "apr_lib.h" +#if APR_HAVE_STDIO_H +#include <stdio.h> +#endif +#if APR_HAVE_STDLIB_H +#include <stdlib.h> +#endif +#if APR_HAVE_CTYPE_H +#include <ctype.h> +#endif +#if APR_HAVE_NETDB_H +#include <netdb.h> +#endif +#if APR_HAVE_NETINET_IN_H +#include <netinet/in.h> +#endif +#if APR_HAVE_STRING_H +#include <string.h> +#endif +#if APR_HAVE_SYS_SOCKET_H +#include <sys/socket.h> +#endif +#if APR_HAVE_ARPA_INET_H +#include <arpa/inet.h> +#endif + +static void cgethost(struct in_addr ipnum, char *string, int check); +static int get_line(char *s, int n); +static void stats(FILE *output); + +#ifdef BEOS +#define NO_ADDRESS NO_DATA +#endif + + +/* maximum line length */ +#ifndef MAXLINE +#define MAXLINE 1024 +#endif + +/* maximum length of a domain name */ +#ifndef MAXDNAME +#define MAXDNAME 256 +#endif + +/* number of buckets in cache hash apr_table_t */ +#define BUCKETS 256 + +#if !APR_HAVE_STRDUP +char *strdup (const char *str) +{ + char *dup; + + if (!(dup = (char *) malloc(strlen(str) + 1))) + return NULL; + dup = strcpy(dup, str); + + return dup; +} +#endif + +/* + * struct nsrec - record of nameservice for cache linked list + * + * ipnum - IP number hostname - hostname noname - nonzero if IP number has no + * hostname, i.e. hostname=IP number + */ + +struct nsrec { + struct in_addr ipnum; + char *hostname; + int noname; + struct nsrec *next; +} *nscache[BUCKETS]; + +/* + * statistics - obvious + */ + +#ifndef h_errno +#ifdef __CYGWIN__ +extern __declspec(dllimport) int h_errno; +#else +extern int h_errno; /* some machines don't have this in their headers */ +#endif +#endif + +/* largest value for h_errno */ + +#define MAX_ERR (NO_ADDRESS) +#define UNKNOWN_ERR (MAX_ERR+1) +#define NO_REVERSE (MAX_ERR+2) + +static int cachehits = 0; +static int cachesize = 0; +static int entries = 0; +static int resolves = 0; +static int withname = 0; +static int errors[MAX_ERR + 3]; + +/* + * cgethost - gets hostname by IP address, caching, and adding unresolvable + * IP numbers with their IP number as hostname, setting noname flag + */ + +static void cgethost (struct in_addr ipnum, char *string, int check) +{ + struct nsrec **current, *new; + struct hostent *hostdata; + char *name; + + current = &nscache[((ipnum.s_addr + (ipnum.s_addr >> 8) + + (ipnum.s_addr >> 16) + (ipnum.s_addr >> 24)) % BUCKETS)]; + + while (*current != NULL && ipnum.s_addr != (*current)->ipnum.s_addr) + current = &(*current)->next; + + if (*current == NULL) { + cachesize++; + new = (struct nsrec *) malloc(sizeof(struct nsrec)); + if (new == NULL) { + perror("malloc"); + fprintf(stderr, "Insufficient memory\n"); + exit(1); + } + *current = new; + new->next = NULL; + + new->ipnum = ipnum; + + hostdata = gethostbyaddr((const char *) &ipnum, sizeof(struct in_addr), + AF_INET); + if (hostdata == NULL) { + if (h_errno > MAX_ERR) + errors[UNKNOWN_ERR]++; + else + errors[h_errno]++; + new->noname = h_errno; + name = strdup(inet_ntoa(ipnum)); + } + else { + new->noname = 0; + name = strdup(hostdata->h_name); + if (check) { + if (name == NULL) { + perror("strdup"); + fprintf(stderr, "Insufficient memory\n"); + exit(1); + } + hostdata = gethostbyname(name); + if (hostdata != NULL) { + char **hptr; + + for (hptr = hostdata->h_addr_list; *hptr != NULL; hptr++) + if (((struct in_addr *) (*hptr))->s_addr == ipnum.s_addr) + break; + if (*hptr == NULL) + hostdata = NULL; + } + if (hostdata == NULL) { + fprintf(stderr, "Bad host: %s != %s\n", name, + inet_ntoa(ipnum)); + new->noname = NO_REVERSE; + free(name); + name = strdup(inet_ntoa(ipnum)); + errors[NO_REVERSE]++; + } + } + } + new->hostname = name; + if (new->hostname == NULL) { + perror("strdup"); + fprintf(stderr, "Insufficient memory\n"); + exit(1); + } + } + else + cachehits++; + + /* size of string == MAXDNAME +1 */ + strncpy(string, (*current)->hostname, MAXDNAME); + string[MAXDNAME] = '\0'; +} + +/* + * prints various statistics to output + */ + +static void stats (FILE *output) +{ + int i; + char *ipstring; + struct nsrec *current; + char *errstring[MAX_ERR + 3]; + + for (i = 0; i < MAX_ERR + 3; i++) + errstring[i] = "Unknown error"; + errstring[HOST_NOT_FOUND] = "Host not found"; + errstring[TRY_AGAIN] = "Try again"; + errstring[NO_RECOVERY] = "Non recoverable error"; + errstring[NO_DATA] = "No data record"; + errstring[NO_ADDRESS] = "No address"; + errstring[NO_REVERSE] = "No reverse entry"; + + fprintf(output, "logresolve Statistics:\n"); + + fprintf(output, "Entries: %d\n", entries); + fprintf(output, " With name : %d\n", withname); + fprintf(output, " Resolves : %d\n", resolves); + if (errors[HOST_NOT_FOUND]) + fprintf(output, " - Not found : %d\n", errors[HOST_NOT_FOUND]); + if (errors[TRY_AGAIN]) + fprintf(output, " - Try again : %d\n", errors[TRY_AGAIN]); + if (errors[NO_DATA]) + fprintf(output, " - No data : %d\n", errors[NO_DATA]); + if (errors[NO_ADDRESS]) + fprintf(output, " - No address: %d\n", errors[NO_ADDRESS]); + if (errors[NO_REVERSE]) + fprintf(output, " - No reverse: %d\n", errors[NO_REVERSE]); + fprintf(output, "Cache hits : %d\n", cachehits); + fprintf(output, "Cache size : %d\n", cachesize); + fprintf(output, "Cache buckets : IP number * hostname\n"); + + for (i = 0; i < BUCKETS; i++) + for (current = nscache[i]; current != NULL; current = current->next) { + ipstring = inet_ntoa(current->ipnum); + if (current->noname == 0) + fprintf(output, " %3d %15s - %s\n", i, ipstring, + current->hostname); + else { + if (current->noname > MAX_ERR + 2) + fprintf(output, " %3d %15s : Unknown error\n", i, + ipstring); + else + fprintf(output, " %3d %15s : %s\n", i, ipstring, + errstring[current->noname]); + } + } +} + + +/* + * gets a line from stdin + */ + +static int get_line (char *s, int n) +{ + char *cp; + + if (!fgets(s, n, stdin)) + return (0); + cp = strchr(s, '\n'); + if (cp) + *cp = '\0'; + return (1); +} + +int main (int argc, char *argv[]) +{ + struct in_addr ipnum; + char *bar, hoststring[MAXDNAME + 1], line[MAXLINE], *statfile; + int i, check; + +#if defined(WIN32) || defined(NETWARE) + /* If we apr'ify this code, apr_pool_create/apr_pool_destroy + * should perform the WSAStartup/WSACleanup for us. + */ + WSADATA wsaData; + WSAStartup(MAKEWORD(2, 0), &wsaData); +#endif + + check = 0; + statfile = NULL; + for (i = 1; i < argc; i++) { + if (strcmp(argv[i], "-c") == 0) + check = 1; + else if (strcmp(argv[i], "-s") == 0) { + if (i == argc - 1) { + fprintf(stderr, "logresolve: missing filename to -s\n"); + exit(1); + } + i++; + statfile = argv[i]; + } + else { + fprintf(stderr, "Usage: logresolve [-s statfile] [-c] < input > output\n"); + exit(0); + } + } + + for (i = 0; i < BUCKETS; i++) + nscache[i] = NULL; + for (i = 0; i < MAX_ERR + 2; i++) + errors[i] = 0; + + while (get_line(line, MAXLINE)) { + if (line[0] == '\0') + continue; + entries++; + if (!apr_isdigit(line[0])) { /* short cut */ + puts(line); + withname++; + continue; + } + bar = strchr(line, ' '); + if (bar != NULL) + *bar = '\0'; + ipnum.s_addr = inet_addr(line); + if (ipnum.s_addr == 0xffffffffu) { + if (bar != NULL) + *bar = ' '; + puts(line); + withname++; + continue; + } + + resolves++; + + cgethost(ipnum, hoststring, check); + if (bar != NULL) + printf("%s %s\n", hoststring, bar + 1); + else + puts(hoststring); + } + +#if defined(WIN32) || defined(NETWARE) + WSACleanup(); +#endif + + if (statfile != NULL) { + FILE *fp; + fp = fopen(statfile, "w"); + if (fp == NULL) { + fprintf(stderr, "logresolve: could not open statistics file '%s'\n" + ,statfile); + exit(1); + } + stats(fp); + fclose(fp); + } + + return (0); +} |