566 lines
14 KiB
C
566 lines
14 KiB
C
/*
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* Copyright (c) 1987, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "ftmacros.h"
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#include <stdio.h>
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#include <string.h>
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#include <signal.h>
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#include <pcap.h> // for PCAP_ERRBUF_SIZE
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#include "portability.h"
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#include "rpcapd.h"
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#include "config_params.h" // configuration file parameters
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#include "fileconf.h"
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#include "rpcap-protocol.h"
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#include "log.h"
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//
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// Parameter names.
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//
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#define PARAM_ACTIVECLIENT "ActiveClient"
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#define PARAM_PASSIVECLIENT "PassiveClient"
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#define PARAM_NULLAUTHPERMIT "NullAuthPermit"
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static char *skipws(char *ptr);
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/*
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* Locale-independent version checks for alphabetical and alphanumerical
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* characters that also can handle being handed a char value that might
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* be negative.
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*/
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#define FILECONF_ISALPHA(c) \
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(((c) >= 'A' && (c) <= 'Z') || ((c) >= 'a' && (c) <= 'z'))
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#define FILECONF_ISALNUM(c) \
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(FILECONF_ISALPHA(c) || ((c) >= '0' && (c) <= '9'))
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void fileconf_read(void)
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{
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FILE *fp;
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unsigned int num_active_clients;
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if ((fp = fopen(loadfile, "r")) != NULL)
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{
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char line[MAX_LINE + 1];
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unsigned int lineno;
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hostlist[0] = 0;
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num_active_clients = 0;
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lineno = 0;
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while (fgets(line, MAX_LINE, fp) != NULL)
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{
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size_t linelen;
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char *ptr;
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char *param;
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size_t result;
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size_t toklen;
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lineno++;
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linelen = strlen(line);
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if (line[linelen - 1] != '\n')
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{
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int c;
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//
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// Either the line doesn't fit in
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// the buffer, or we got an EOF
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// before the EOL. Assume it's the
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// former.
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//
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u is longer than %u characters",
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loadfile, lineno, MAX_LINE);
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//
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// Eat characters until we get an NL.
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//
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while ((c = getc(fp)) != '\n')
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{
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if (c == EOF)
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goto done;
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}
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//
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// Try the next line.
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//
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continue;
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}
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ptr = line;
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//
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// Skip leading white space, if any.
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//
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ptr = skipws(ptr);
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if (ptr == NULL)
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{
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// Blank line.
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continue;
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}
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//
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// Is the next character a "#"? If so, this
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// line is a comment; skip to the next line.
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//
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if (*ptr == '#')
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continue;
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//
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// Is the next character alphabetic? If not,
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// this isn't a valid parameter name.
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//
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if (FILECONF_ISALPHA(*ptr))
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{
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u doesn't have a valid parameter name",
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loadfile, lineno);
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continue;
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}
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//
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// Grab the first token, which is made of
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// alphanumerics, underscores, and hyphens.
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// That's the name of the parameter being set.
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//
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param = ptr;
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while (FILECONF_ISALNUM(*ptr) || *ptr == '-' || *ptr == '_')
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ptr++;
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//
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// Skip over white space, if any.
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//
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ptr = skipws(ptr);
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if (ptr == NULL || *ptr != '=')
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{
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//
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// We hit the end of the line before
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// finding a non-white space character,
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// or we found one but it's not an "=".
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// That means there's no "=", so this
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// line is invalid. Complain and skip
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// this line.
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//
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u has a parameter but no =",
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loadfile, lineno);
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continue;
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}
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//
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// We found the '='; set it to '\0', and skip
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// past it.
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//
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*ptr++ = '\0';
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//
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// Skip past any white space after the "=".
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//
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ptr = skipws(ptr);
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if (ptr == NULL)
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{
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//
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// The value is empty.
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//
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u has a parameter but no value",
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loadfile, lineno);
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continue;
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}
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//
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// OK, what parameter is this?
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//
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if (strcmp(param, PARAM_ACTIVECLIENT) == 0) {
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//
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// Add this to the list of active clients.
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//
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char *address, *port;
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//
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// We can't have more than MAX_ACTIVE_LIST
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// active clients.
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//
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if (num_active_clients >= MAX_ACTIVE_LIST)
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{
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//
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// Too many entries for the active
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// client list. Complain and
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// ignore it.
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//
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u has an %s parameter, but we already have %u active clients",
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loadfile, lineno, PARAM_ACTIVECLIENT,
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MAX_ACTIVE_LIST);
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continue;
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}
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//
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// Get the address.
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// It's terminated by a host list separator
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// *or* a #; there *shouldn't* be a #, as
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// that starts a comment, and that would
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// mean that we have no port.
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//
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address = ptr;
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toklen = strcspn(ptr, RPCAP_HOSTLIST_SEP "#");
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ptr += toklen; // skip to the terminator
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if (toklen == 0)
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{
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if (*ptr == ' ' || *ptr == '\t' ||
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*ptr == '\r' || *ptr == '\n' ||
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*ptr == '#' || *ptr == '\0')
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{
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//
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// The first character it saw
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// was a whitespace character
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// or a comment character,
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// or we ran out of characters.
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// This means that there's
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// no value.
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//
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u has a parameter but no value",
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loadfile, lineno);
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}
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else
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{
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//
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// This means that the first
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// character it saw was a
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// separator. This means that
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// there's no address in the
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// value, just a port.
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//
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u has an %s parameter with a value containing no address",
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loadfile, lineno, PARAM_ACTIVECLIENT);
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}
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continue;
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}
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//
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// Null-terminate the address, and skip past
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// it.
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//
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*ptr++ = '\0';
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//
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// Skip any white space following the
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// separating character.
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//
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ptr = skipws(ptr);
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if (ptr == NULL)
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{
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//
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// The value is empty, so there's
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// no port in the value.
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//
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u has an %s parameter with a value containing no port",
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loadfile, lineno, PARAM_ACTIVECLIENT);
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continue;
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}
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//
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// Get the port.
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// We look for a white space character
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// or a # as a terminator; the # introduces
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// a comment that runs to the end of the
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// line.
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//
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port = ptr;
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toklen = strcspn(ptr, " \t#\r\n");
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ptr += toklen;
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if (toklen == 0)
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{
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//
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// The value is empty, so there's
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// no port in the value.
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//
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u has an %s parameter with a value containing no port",
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loadfile, lineno, PARAM_ACTIVECLIENT);
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continue;
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}
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//
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// Null-terminate the port, and skip past
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// it.
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//
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*ptr++ = '\0';
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result = pcap_strlcpy(activelist[num_active_clients].address, address, sizeof(activelist[num_active_clients].address));
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if (result >= sizeof(activelist[num_active_clients].address))
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{
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//
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// It didn't fit.
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//
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u has an %s parameter with an address with more than %u characters",
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loadfile, lineno, PARAM_ACTIVECLIENT,
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(unsigned int)(sizeof(activelist[num_active_clients].address) - 1));
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continue;
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}
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if (strcmp(port, "DEFAULT") == 0) // the user choose a custom port
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result = pcap_strlcpy(activelist[num_active_clients].port, RPCAP_DEFAULT_NETPORT_ACTIVE, sizeof(activelist[num_active_clients].port));
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else
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result = pcap_strlcpy(activelist[num_active_clients].port, port, sizeof(activelist[num_active_clients].port));
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if (result >= sizeof(activelist[num_active_clients].address))
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{
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//
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// It didn't fit.
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//
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u has an %s parameter with an port with more than %u characters",
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loadfile, lineno, PARAM_ACTIVECLIENT,
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(unsigned int)(sizeof(activelist[num_active_clients].port) - 1));
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continue;
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}
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num_active_clients++;
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}
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else if (strcmp(param, PARAM_PASSIVECLIENT) == 0)
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{
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char *eos;
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char *host;
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//
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// Get the host.
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// We look for a white space character
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// or a # as a terminator; the # introduces
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// a comment that runs to the end of the
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// line.
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//
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host = ptr;
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toklen = strcspn(ptr, " \t#\r\n");
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if (toklen == 0)
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{
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//
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// The first character it saw
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// was a whitespace character
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// or a comment character.
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// This means that there's
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// no value.
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//
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u has a parameter but no value",
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loadfile, lineno);
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continue;
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}
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ptr += toklen;
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*ptr++ = '\0';
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//
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// Append this to the host list.
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// Save the curren end-of-string for the
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// host list, in case the new host doesn't
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// fit, so that we can discard the partially-
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// copied host name.
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//
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eos = hostlist + strlen(hostlist);
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if (eos != hostlist)
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{
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//
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// The list is not empty, so prepend
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// a comma before adding this host.
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//
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result = pcap_strlcat(hostlist, ",", sizeof(hostlist));
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if (result >= sizeof(hostlist))
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{
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//
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// It didn't fit. Discard
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// the comma (which wasn't
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// added, but...), complain,
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// and ignore this line.
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//
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*eos = '\0';
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u has a %s parameter with a host name that doesn't fit",
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loadfile, lineno, PARAM_PASSIVECLIENT);
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continue;
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}
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}
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result = pcap_strlcat(hostlist, host, sizeof(hostlist));
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if (result >= sizeof(hostlist))
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{
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//
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// It didn't fit. Discard the comma,
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// complain, and ignore this line.
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//
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*eos = '\0';
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u has a %s parameter with a host name that doesn't fit",
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loadfile, lineno, PARAM_PASSIVECLIENT);
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continue;
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}
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}
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else if (strcmp(param, PARAM_NULLAUTHPERMIT) == 0)
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{
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char *setting;
|
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//
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// Get the setting.
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// We look for a white space character
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// or a # as a terminator; the # introduces
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// a comment that runs to the end of the
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// line.
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//
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setting = ptr;
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toklen = strcspn(ptr, " \t#\r\n");
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ptr += toklen;
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if (toklen == 0)
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{
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//
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// The first character it saw
|
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// was a whitespace character
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// or a comment character.
|
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// This means that there's
|
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// no value.
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//
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rpcapd_log(LOGPRIO_ERROR,
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"%s, line %u has a parameter but no value",
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loadfile, lineno);
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continue;
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}
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*ptr++ = '\0';
|
|
|
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//
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// XXX - should we complain if it's
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// neither "yes" nor "no"?
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//
|
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if (strcmp(setting, "YES") == 0)
|
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nullAuthAllowed = 1;
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else
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nullAuthAllowed = 0;
|
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}
|
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else
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{
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rpcapd_log(LOGPRIO_ERROR,
|
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"%s, line %u has an unknown parameter %s",
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loadfile, lineno, param);
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continue;
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}
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}
|
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|
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done:
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// clear the remaining fields of the active list
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for (int i = num_active_clients; i < MAX_ACTIVE_LIST; i++)
|
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{
|
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activelist[i].address[0] = 0;
|
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activelist[i].port[0] = 0;
|
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num_active_clients++;
|
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}
|
|
|
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rpcapd_log(LOGPRIO_DEBUG, "New passive host list: %s", hostlist);
|
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fclose(fp);
|
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}
|
|
}
|
|
|
|
int fileconf_save(const char *savefile)
|
|
{
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FILE *fp;
|
|
|
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if ((fp = fopen(savefile, "w")) != NULL)
|
|
{
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char *token; /*, *port;*/ // temp, needed to separate items into the hostlist
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char temphostlist[MAX_HOST_LIST + 1];
|
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int i = 0;
|
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char *lasts;
|
|
|
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fprintf(fp, "# Configuration file help.\n\n");
|
|
|
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// Save list of clients which are allowed to connect to us in passive mode
|
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fprintf(fp, "# Hosts which are allowed to connect to this server (passive mode)\n");
|
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fprintf(fp, "# Format: PassiveClient = <name or address>\n\n");
|
|
|
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pcap_strlcpy(temphostlist, hostlist, sizeof (temphostlist));
|
|
|
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token = pcap_strtok_r(temphostlist, RPCAP_HOSTLIST_SEP, &lasts);
|
|
while(token != NULL)
|
|
{
|
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fprintf(fp, "%s = %s\n", PARAM_PASSIVECLIENT, token);
|
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token = pcap_strtok_r(NULL, RPCAP_HOSTLIST_SEP, &lasts);
|
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}
|
|
|
|
|
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// Save list of clients which are allowed to connect to us in active mode
|
|
fprintf(fp, "\n\n");
|
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fprintf(fp, "# Hosts to which this server is trying to connect to (active mode)\n");
|
|
fprintf(fp, "# Format: ActiveClient = <name or address>, <port | DEFAULT>\n\n");
|
|
|
|
|
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while ((i < MAX_ACTIVE_LIST) && (activelist[i].address[0] != 0))
|
|
{
|
|
fprintf(fp, "%s = %s, %s\n", PARAM_ACTIVECLIENT,
|
|
activelist[i].address, activelist[i].port);
|
|
i++;
|
|
}
|
|
|
|
// Save if we want to permit NULL authentication
|
|
fprintf(fp, "\n\n");
|
|
fprintf(fp, "# Permit NULL authentication: YES or NO\n\n");
|
|
|
|
fprintf(fp, "%s = %s\n", PARAM_NULLAUTHPERMIT,
|
|
nullAuthAllowed ? "YES" : "NO");
|
|
|
|
fclose(fp);
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
}
|
|
|
|
//
|
|
// Skip over white space.
|
|
// If we hit a CR or LF, return NULL, otherwise return a pointer to
|
|
// the first non-white space character. Replace white space characters
|
|
// other than CR or LF with '\0', so that, if we're skipping white space
|
|
// after a token, the token is null-terminated.
|
|
//
|
|
static char *skipws(char *ptr)
|
|
{
|
|
while (*ptr == ' ' || *ptr == '\t' || *ptr == '\r' || *ptr == '\n') {
|
|
if (*ptr == '\r' || *ptr == '\n')
|
|
return NULL;
|
|
*ptr++ = '\0';
|
|
}
|
|
return ptr;
|
|
}
|