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https://github.com/reactos/reactos.git
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311 lines
7.7 KiB
C
311 lines
7.7 KiB
C
/*
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* adnslogres.c
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* - a replacement for the Apache logresolve program using adns
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*/
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/*
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* This file is
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* Copyright (C) 1999-2000 Tony Finch <dot@dotat.at>
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* Copyright (C) 1999-2000 Ian Jackson <ian@davenant.greenend.org.uk>
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*
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* It is part of adns, which is
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* Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
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* Copyright (C) 1999-2000 Tony Finch <dot@dotat.at>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* This version was originally supplied by Tony Finch, but has been
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* modified by Ian Jackson as it was incorporated into adns and
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* subsequently.
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*/
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#ifdef ADNS_JGAA_WIN32
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# include "adns_win32.h"
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# include "getopt.h"
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#else
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# include <sys/types.h>
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# include <sys/time.h>
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# include <unistd.h>
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# include <string.h>
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# include <stdlib.h>
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# include <stdio.h>
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# include <ctype.h>
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# include <errno.h>
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# include <stdarg.h>
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#endif
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#include "config.h"
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#include "adns.h"
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#include "client.h"
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#ifdef ADNS_REGRESS_TEST
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# include "hredirect.h"
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#endif
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/* maximum number of concurrent DNS queries */
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#define MAXMAXPENDING 64000
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#define DEFMAXPENDING 2000
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/* maximum length of a line */
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#define MAXLINE 1024
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/* option flags */
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#define OPT_DEBUG 1
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#ifdef HAVE_POLL
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# define OPT_POLL 2
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#endif
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static const char *const progname= "adnslogres";
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static const char *config_text;
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#define guard_null(str) ((str) ? (str) : "")
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#define sensible_ctype(type,ch) (type((unsigned char)(ch)))
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/* isfoo() functions from ctype.h can't safely be fed char - blech ! */
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static void msg(const char *fmt, ...) {
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va_list al;
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fprintf(stderr, "%s: ", progname);
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va_start(al,fmt);
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vfprintf(stderr, fmt, al);
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va_end(al);
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fputc('\n',stderr);
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}
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static void aargh(const char *cause) {
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const char *why = strerror(errno);
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if (!why) why = "Unknown error";
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msg("%s: %s (%d)", cause, why, errno);
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exit(1);
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}
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/*
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* Parse the IP address and convert to a reverse domain name.
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*/
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static char *ipaddr2domain(char *start, char **addr, char **rest) {
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static char buf[30]; /* "123.123.123.123.in-addr.arpa.\0" */
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char *ptrs[5];
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int i;
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ptrs[0]= start;
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retry:
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while (!sensible_ctype(isdigit,*ptrs[0]))
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if (!*ptrs[0]++) {
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strcpy(buf, "invalid.");
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*addr= *rest= NULL;
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return buf;
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}
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for (i= 1; i < 5; i++) {
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ptrs[i]= ptrs[i-1];
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while (sensible_ctype(isdigit,*ptrs[i]++));
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if ((i == 4 && !sensible_ctype(isspace,ptrs[i][-1])) ||
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(i != 4 && ptrs[i][-1] != '.') ||
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(ptrs[i]-ptrs[i-1] > 4)) {
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ptrs[0]= ptrs[i]-1;
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goto retry;
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}
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}
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sprintf(buf, "%.*s.%.*s.%.*s.%.*s.in-addr.arpa.",
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ptrs[4]-ptrs[3]-1, ptrs[3],
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ptrs[3]-ptrs[2]-1, ptrs[2],
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ptrs[2]-ptrs[1]-1, ptrs[1],
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ptrs[1]-ptrs[0]-1, ptrs[0]);
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*addr= ptrs[0];
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*rest= ptrs[4]-1;
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return buf;
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}
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static void printline(FILE *outf, char *start, char *addr, char *rest, char *domain) {
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if (domain)
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fprintf(outf, "%.*s%s%s", addr - start, start, domain, rest);
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else
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fputs(start, outf);
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if (ferror(outf)) aargh("write output");
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}
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typedef struct logline {
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struct logline *next;
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char *start, *addr, *rest;
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adns_query query;
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} logline;
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static logline *readline(FILE *inf, adns_state adns, int opts) {
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static char buf[MAXLINE];
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char *str;
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logline *line;
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if (fgets(buf, MAXLINE, inf)) {
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str= malloc(sizeof(*line) + strlen(buf) + 1);
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if (!str) aargh("malloc");
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line= (logline*)str;
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line->next= NULL;
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line->start= str+sizeof(logline);
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strcpy(line->start, buf);
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str= ipaddr2domain(line->start, &line->addr, &line->rest);
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if (opts & OPT_DEBUG)
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msg("submitting %.*s -> %s", line->rest-line->addr, guard_null(line->addr), str);
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if (adns_submit(adns, str, adns_r_ptr,
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adns_qf_quoteok_cname|adns_qf_cname_loose,
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NULL, &line->query))
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aargh("adns_submit");
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return line;
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}
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if (!feof(inf))
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aargh("fgets");
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return NULL;
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}
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static void proclog(FILE *inf, FILE *outf, int maxpending, int opts) {
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int eof, err, len;
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adns_state adns;
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adns_answer *answer;
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logline *head, *tail, *line;
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adns_initflags initflags;
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initflags= (opts & OPT_DEBUG) ? adns_if_debug : 0;
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if (config_text) {
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errno= adns_init_strcfg(&adns, initflags, stderr, config_text);
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} else {
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errno= adns_init(&adns, initflags, 0);
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}
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if (errno) aargh("adns_init");
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head= tail= readline(inf, adns, opts);
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len= 1; eof= 0;
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while (head) {
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while (head) {
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if (opts & OPT_DEBUG)
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msg("%d in queue; checking %.*s", len,
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head->rest-head->addr, guard_null(head->addr));
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if (eof || len >= maxpending) {
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#ifdef HAVE_POLL
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if (opts & OPT_POLL)
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err= adns_wait_poll(adns, &head->query, &answer, NULL);
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else
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#endif
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err= adns_wait(adns, &head->query, &answer, NULL);
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} else {
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err= adns_check(adns, &head->query, &answer, NULL);
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}
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if ((err == EAGAIN) || (EWOULDBLOCK == err)) break;
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if (err) {
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fprintf(stderr, "%s: adns_wait/check: %s", progname, strerror(err));
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exit(1);
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}
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printline(outf, head->start, head->addr, head->rest,
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answer->status == adns_s_ok ? *answer->rrs.str : NULL);
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line= head; head= head->next;
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free(line);
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free(answer);
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len--;
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}
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if (!eof) {
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line= readline(inf, adns, opts);
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if (line) {
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if (!head) head= line;
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else tail->next= line;
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tail= line; len++;
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} else {
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eof= 1;
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}
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}
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}
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adns_finish(adns);
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}
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static void printhelp(FILE *file) {
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fputs("usage: adnslogres [<options>] [<logfile>]\n"
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" adnslogres --version|--help\n"
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"options: -c <concurrency> set max number of outstanding queries\n"
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#ifdef HAVE_POLL
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" -p use poll(2) instead of select(2)\n"
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#endif
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" -d turn on debugging\n"
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" -C <config> use instead of contents of resolv.conf\n",
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stdout);
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}
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static void usage(void) {
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printhelp(stderr);
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exit(1);
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}
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int main(int argc, char *argv[]) {
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int c, opts, maxpending;
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extern char *optarg;
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FILE *inf;
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if (argv[1] && !strncmp(argv[1],"--",2)) {
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if (!strcmp(argv[1],"--help")) {
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printhelp(stdout);
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} else if (!strcmp(argv[1],"--version")) {
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fputs(VERSION_MESSAGE("adnslogres"),stdout);
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} else {
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usage();
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}
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if (ferror(stdout) || fclose(stdout)) { perror("stdout"); exit(1); }
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exit(0);
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}
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maxpending= DEFMAXPENDING;
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opts= 0;
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while ((c= getopt(argc, argv, "c:C:dp")) != -1)
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switch (c) {
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case 'c':
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maxpending= atoi(optarg);
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if (maxpending < 1 || maxpending > MAXMAXPENDING) {
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fprintf(stderr, "%s: unfeasible concurrency %d\n", progname, maxpending);
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exit(1);
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}
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break;
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case 'C':
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config_text= optarg;
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break;
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case 'd':
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opts|= OPT_DEBUG;
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break;
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#ifdef HAVE_POLL
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case 'p':
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opts|= OPT_POLL;
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break;
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#endif
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default:
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usage();
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}
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argc-= optind;
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argv+= optind;
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inf= NULL;
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if (argc == 0)
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inf= stdin;
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else if (argc == 1)
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inf= fopen(*argv, "r");
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else
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usage();
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if (!inf)
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aargh("couldn't open input");
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proclog(inf, stdout, maxpending, opts);
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if (fclose(inf))
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aargh("fclose input");
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if (fclose(stdout))
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aargh("fclose output");
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return 0;
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}
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