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623 lines
15 KiB
C
623 lines
15 KiB
C
/*
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* Copyright (c) 1985, 1989
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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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/*
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* Portions Copyright (c) 1993 by Digital Equipment Corporation.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies, and that
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* the name of Digital Equipment Corporation not be used in advertising or
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* publicity pertaining to distribution of the document or software without
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* specific, written prior permission.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
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* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
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||
* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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||
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)list.c 5.23 (Berkeley) 3/21/91";
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static char rcsid[] = "$Id: list.c,v 8.13 1997/11/18 00:32:33 halley Exp $";
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#endif /* not lint */
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/*
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*******************************************************************************
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*
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* list.c --
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*
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* Routines to obtain info from name and finger servers.
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*
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* Adapted from 4.3BSD BIND ns_init.c and from finger.c.
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*
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*******************************************************************************
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*/
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#include "port_before.h"
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/nameser.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <errno.h>
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#include <limits.h>
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#include <netdb.h>
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#include <resolv.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "port_after.h"
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#include "res.h"
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extern char *_res_resultcodes[]; /* res_debug.c */
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extern char *pager;
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typedef union {
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HEADER qb1;
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u_char qb2[PACKETSZ];
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} querybuf;
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extern HostInfo *defaultPtr;
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extern HostInfo curHostInfo;
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extern int curHostValid;
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extern int queryType;
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extern int queryClass;
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static int sockFD = -1;
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int ListSubr();
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/*
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* During a listing to a file, hash marks are printed
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* every HASH_SIZE records.
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*/
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#define HASH_SIZE 50
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/*
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*******************************************************************************
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*
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* ListHosts --
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* ListHostsByType --
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*
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* Requests the name server to do a zone transfer so we
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* find out what hosts it knows about.
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*
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* For ListHosts, there are five types of output:
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* - Internet addresses (default)
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* - cpu type and operating system (-h option)
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* - canonical and alias names (-a option)
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* - well-known service names (-s option)
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* - ALL records (-d option)
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* ListHostsByType prints records of the default type or of a speicific
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* type.
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*
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* To see all types of information sorted by name, do the following:
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* ls -d domain.edu > file
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* view file
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*
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* Results:
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* SUCCESS the listing was successful.
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* ERROR the server could not be contacted because
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* a socket could not be obtained or an error
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* occured while receiving, or the output file
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* could not be opened.
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*
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*******************************************************************************
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*/
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void
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ListHostsByType(char *string, int putToFile) {
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char *namePtr, name[NAME_LEN], option[NAME_LEN];
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int i, qtype, result;
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/*
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* Parse the command line. It maybe of the form "ls -t domain"
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* or "ls -t type domain".
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*/
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i = sscanf(string, " ls -t %s %s", option, name);
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if (putToFile && i == 2 && name[0] == '>')
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i--;
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if (i == 2) {
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qtype = StringToType(option, -1, stderr);
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if (qtype == -1)
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return;
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namePtr = name;
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} else if (i == 1) {
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namePtr = option;
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qtype = queryType;
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} else {
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fprintf(stderr, "*** ls: invalid request %s\n", string);
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return;
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}
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result = ListSubr(qtype, namePtr, putToFile ? string : NULL);
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if (result != SUCCESS)
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fprintf(stderr, "*** Can't list domain %s: %s\n",
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namePtr, DecodeError(result));
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}
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void
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ListHosts(char *string, int putToFile) {
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char *namePtr, name[NAME_LEN], option[NAME_LEN];
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int i, qtype, result;
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/*
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* Parse the command line. It maybe of the form "ls domain",
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* "ls -X domain".
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*/
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i = sscanf(string, " ls %s %s", option, name);
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if (putToFile && i == 2 && name[0] == '>')
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i--;
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if (i == 2) {
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if (strcmp("-a", option) == 0)
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qtype = T_CNAME;
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else if (strcmp("-h", option) == 0)
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qtype = T_HINFO;
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else if (strcmp("-m", option) == 0)
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qtype = T_MX;
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else if (strcmp("-p", option) == 0)
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qtype = T_PX;
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else if (strcmp("-s", option) == 0)
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qtype = T_WKS;
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else if (strcmp("-d", option) == 0)
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qtype = T_ANY;
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else if (strcmp("-n", option) == 0)
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qtype = T_NAPTR;
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else
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qtype = T_A;
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namePtr = name;
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} else if (i == 1) {
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namePtr = option;
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qtype = T_A;
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} else {
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fprintf(stderr, "*** ls: invalid request %s\n",string);
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return;
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}
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result = ListSubr(qtype, namePtr, putToFile ? string : NULL);
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if (result != SUCCESS)
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fprintf(stderr, "*** Can't list domain %s: %s\n",
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namePtr, DecodeError(result));
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}
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int
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ListSubr(int qtype, char *domain, char *cmd) {
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static u_char *answer = NULL;
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static int answerLen = 0;
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ns_msg handle;
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querybuf buf;
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struct sockaddr_in sin;
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HEADER *headerPtr;
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int msglen, amtToRead, numRead, n, count, soacnt;
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u_int len;
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int numAnswers = 0;
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int numRecords = 0;
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u_char tmp[INT16SZ], *cp;
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char soaname[2][NAME_LEN], file[NAME_LEN];
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enum { NO_ERRORS, ERR_READING_LEN, ERR_READING_MSG, ERR_PRINTING }
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error = NO_ERRORS;
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/*
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* Create a query packet for the requested domain name.
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*/
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msglen = res_mkquery(QUERY, domain, queryClass, T_AXFR,
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NULL, 0, 0, buf.qb2, sizeof buf);
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if (msglen < 0) {
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if (_res.options & RES_DEBUG)
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fprintf(stderr, "*** ls: res_mkquery failed\n");
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return (ERROR);
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}
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memset(&sin, 0, sizeof sin);
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sin.sin_family = AF_INET;
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sin.sin_port = htons(nsport);
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/*
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* Check to see if we have the address of the server or the
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* address of a server who knows about this domain.
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*
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* For now, just use the first address in the list. XXX.
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*/
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if (defaultPtr->addrList != NULL)
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sin.sin_addr = *(struct in_addr *) defaultPtr->addrList[0];
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else
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sin.sin_addr = *(struct in_addr *)
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defaultPtr->servers[0]->addrList[0];
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/*
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* Set up a virtual circuit to the server.
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*/
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sockFD = socket(AF_INET, SOCK_STREAM, 0);
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if (sockFD < 0) {
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perror("ls: socket");
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return (ERROR);
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}
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if (connect(sockFD, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
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int e;
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if (errno == ECONNREFUSED)
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e = NO_RESPONSE;
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else {
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perror("ls: connect");
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e = ERROR;
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}
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(void) close(sockFD);
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sockFD = -1;
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return (e);
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}
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/*
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* Send length & message for zone transfer
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*/
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ns_put16(msglen, tmp);
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if (write(sockFD, (char *)tmp, INT16SZ) != INT16SZ ||
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write(sockFD, (char *)buf.qb2, msglen) != msglen) {
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perror("ls: write");
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(void) close(sockFD);
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sockFD = -1;
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return(ERROR);
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}
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fprintf(stdout,"[%s]\n", (defaultPtr->addrList != NULL)
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? defaultPtr->name : defaultPtr->servers[0]->name);
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if (cmd == NULL) {
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filePtr = stdout;
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} else {
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filePtr = OpenFile(cmd, file);
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if (filePtr == NULL) {
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fprintf(stderr, "*** Can't open %s for writing\n",
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file);
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(void) close(sockFD);
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sockFD = -1;
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return (ERROR);
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}
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fprintf(filePtr, "> %s\n", cmd);
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fprintf(filePtr, "[%s]\n", (defaultPtr->addrList != NULL)
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? defaultPtr->name : defaultPtr->servers[0]->name);
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}
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soacnt = 0;
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while (soacnt < 2) {
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/*
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* Read the length of the response.
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*/
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cp = tmp; amtToRead = INT16SZ;
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while (amtToRead > 0 &&
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(numRead = read(sockFD, cp, amtToRead)) > 0) {
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cp += numRead;
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amtToRead -= numRead;
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}
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if (numRead <= 0) {
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error = ERR_READING_LEN;
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break;
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}
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len = ns_get16(tmp);
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if (len == 0)
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break; /* nothing left to read */
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/*
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* If the server sent too much data to fit the existing
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* buffer, allocate a new one.
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*/
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if (len > (u_int)answerLen) {
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if (answerLen != 0)
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free(answer);
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answerLen = len;
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answer = (u_char *)Malloc(answerLen);
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}
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||
|
||
/*
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* Read the response.
|
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*/
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amtToRead = len; cp = answer;
|
||
while (amtToRead > 0 &&
|
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(numRead = read(sockFD, cp, amtToRead)) > 0) {
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cp += numRead;
|
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amtToRead -= numRead;
|
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}
|
||
if (numRead <= 0) {
|
||
error = ERR_READING_MSG;
|
||
break;
|
||
}
|
||
|
||
if (ns_initparse(answer, cp - answer, &handle) < 0) {
|
||
perror("ns_initparse");
|
||
error = ERR_PRINTING;
|
||
break;
|
||
}
|
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if (ns_msg_getflag(handle, ns_f_rcode) != ns_r_noerror ||
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ns_msg_count(handle, ns_s_an) == 0) {
|
||
/* Signalled protocol error, or empty message. */
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||
error = ERR_PRINTING;
|
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break;
|
||
}
|
||
|
||
for (;;) {
|
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static char origin[NS_MAXDNAME], name_ctx[NS_MAXDNAME];
|
||
const char *name;
|
||
char buf[2048]; /* XXX need to malloc/realloc. */
|
||
ns_rr rr;
|
||
|
||
if (ns_parserr(&handle, ns_s_an, -1, &rr)) {
|
||
if (errno != ENODEV) {
|
||
perror("ns_parserr");
|
||
error = ERR_PRINTING;
|
||
}
|
||
break;
|
||
}
|
||
name = ns_rr_name(rr);
|
||
if (origin[0] == '\0' && name[0] != '\0') {
|
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fprintf(filePtr, "$ORIGIN %s.\n", name);
|
||
strcpy(origin, name);
|
||
}
|
||
if (qtype == T_ANY || ns_rr_type(rr) == qtype) {
|
||
if (ns_sprintrr(&handle, &rr, name_ctx, origin,
|
||
buf, sizeof buf) < 0) {
|
||
perror("ns_sprintrr");
|
||
error = ERR_PRINTING;
|
||
break;
|
||
}
|
||
strcpy(name_ctx, name);
|
||
numAnswers++;
|
||
fputs(buf, filePtr);
|
||
fputc('\n', filePtr);
|
||
}
|
||
if (ns_rr_type(rr) == T_SOA) {
|
||
strcpy(soaname[soacnt], name);
|
||
if (soacnt == 0)
|
||
soacnt = 1;
|
||
else if (strcasecmp(soaname[0],
|
||
soaname[1]) == 0) {
|
||
soacnt = 2;
|
||
}
|
||
}
|
||
}
|
||
if (error != NO_ERRORS)
|
||
break;
|
||
numAnswers++;
|
||
if (cmd != NULL && ((numAnswers % HASH_SIZE) == 0)) {
|
||
fprintf(stdout, "#");
|
||
fflush(stdout);
|
||
}
|
||
}
|
||
|
||
if (cmd != NULL)
|
||
fprintf(stdout, "%sReceived %d answer%s (%d record%s).\n",
|
||
(numAnswers >= HASH_SIZE) ? "\n" : "",
|
||
numAnswers, (numAnswers != 1) ? "s" : "",
|
||
numRecords, (numRecords != 1) ? "s" : "");
|
||
|
||
(void) close(sockFD);
|
||
sockFD = -1;
|
||
if (cmd != NULL && filePtr != NULL) {
|
||
fclose(filePtr);
|
||
filePtr = NULL;
|
||
}
|
||
|
||
switch (error) {
|
||
case NO_ERRORS:
|
||
return (SUCCESS);
|
||
|
||
case ERR_READING_LEN:
|
||
return (ERROR);
|
||
|
||
case ERR_PRINTING:
|
||
return (ERROR);
|
||
|
||
case ERR_READING_MSG:
|
||
headerPtr = (HEADER *) answer;
|
||
fprintf(stderr,"*** ls: error receiving zone transfer:\n");
|
||
fprintf(stderr,
|
||
" result: %s, answers = %d, authority = %d, additional = %d\n",
|
||
_res_resultcodes[headerPtr->rcode],
|
||
ntohs(headerPtr->ancount), ntohs(headerPtr->nscount),
|
||
ntohs(headerPtr->arcount));
|
||
return (ERROR);
|
||
default:
|
||
return (ERROR);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*******************************************************************************
|
||
*
|
||
* ViewList --
|
||
*
|
||
* A hack to view the output of the ls command in sorted
|
||
* order using more.
|
||
*
|
||
*******************************************************************************
|
||
*/
|
||
|
||
ViewList(string)
|
||
char *string;
|
||
{
|
||
char file[PATH_MAX];
|
||
char command[PATH_MAX];
|
||
|
||
sscanf(string, " view %s", file);
|
||
(void)sprintf(command, "grep \"^ \" %s | sort | %s", file, pager);
|
||
system(command);
|
||
}
|
||
|
||
/*
|
||
*******************************************************************************
|
||
*
|
||
* Finger --
|
||
*
|
||
* Connects with the finger server for the current host
|
||
* to request info on the specified person (long form)
|
||
* who is on the system (short form).
|
||
*
|
||
* Results:
|
||
* SUCCESS the finger server was contacted.
|
||
* ERROR the server could not be contacted because
|
||
* a socket could not be obtained or connected
|
||
* to or the service could not be found.
|
||
*
|
||
*******************************************************************************
|
||
*/
|
||
|
||
Finger(string, putToFile)
|
||
char *string;
|
||
int putToFile;
|
||
{
|
||
struct servent *sp;
|
||
struct sockaddr_in sin;
|
||
FILE *f;
|
||
int c;
|
||
int lastc;
|
||
char name[NAME_LEN];
|
||
char file[NAME_LEN];
|
||
|
||
/*
|
||
* We need a valid current host info to get an inet address.
|
||
*/
|
||
if (!curHostValid) {
|
||
fprintf(stderr, "Finger: no current host defined.\n");
|
||
return (ERROR);
|
||
}
|
||
|
||
if (sscanf(string, " finger %s", name) == 1) {
|
||
if (putToFile && (name[0] == '>')) {
|
||
name[0] = '\0';
|
||
}
|
||
} else {
|
||
name[0] = '\0';
|
||
}
|
||
|
||
sp = getservbyname("finger", "tcp");
|
||
if (sp == 0) {
|
||
fprintf(stderr, "Finger: unknown service\n");
|
||
return (ERROR);
|
||
}
|
||
|
||
memset(&sin, 0, sizeof sin);
|
||
sin.sin_family = curHostInfo.addrType;
|
||
sin.sin_port = sp->s_port;
|
||
memcpy(&sin.sin_addr, curHostInfo.addrList[0], curHostInfo.addrLen);
|
||
|
||
/*
|
||
* Set up a virtual circuit to the host.
|
||
*/
|
||
|
||
sockFD = socket(curHostInfo.addrType, SOCK_STREAM, 0);
|
||
if (sockFD < 0) {
|
||
fflush(stdout);
|
||
perror("finger: socket");
|
||
return (ERROR);
|
||
}
|
||
|
||
if (connect(sockFD, (struct sockaddr *)&sin, sizeof (sin)) < 0) {
|
||
fflush(stdout);
|
||
perror("finger: connect");
|
||
close(sockFD);
|
||
sockFD = -1;
|
||
return (ERROR);
|
||
}
|
||
|
||
if (!putToFile) {
|
||
filePtr = stdout;
|
||
} else {
|
||
filePtr = OpenFile(string, file);
|
||
if (filePtr == NULL) {
|
||
fprintf(stderr, "*** Can't open %s for writing\n", file);
|
||
close(sockFD);
|
||
sockFD = -1;
|
||
return(ERROR);
|
||
}
|
||
fprintf(filePtr,"> %s\n", string);
|
||
}
|
||
fprintf(filePtr, "[%s]\n", curHostInfo.name);
|
||
|
||
if (name[0] != '\0') {
|
||
write(sockFD, "/W ", 3);
|
||
}
|
||
write(sockFD, name, strlen(name));
|
||
write(sockFD, "\r\n", 2);
|
||
f = fdopen(sockFD, "r");
|
||
lastc = '\n';
|
||
while ((c = getc(f)) != EOF) {
|
||
switch (c) {
|
||
case 0210:
|
||
case 0211:
|
||
case 0212:
|
||
case 0214:
|
||
c -= 0200;
|
||
break;
|
||
case 0215:
|
||
c = '\n';
|
||
break;
|
||
}
|
||
putc(lastc = c, filePtr);
|
||
}
|
||
if (lastc != '\n') {
|
||
putc('\n', filePtr);
|
||
}
|
||
putc('\n', filePtr);
|
||
|
||
close(sockFD);
|
||
sockFD = -1;
|
||
|
||
if (putToFile) {
|
||
fclose(filePtr);
|
||
filePtr = NULL;
|
||
}
|
||
return (SUCCESS);
|
||
}
|
||
|
||
ListHost_close()
|
||
{
|
||
if (sockFD != -1) {
|
||
(void) close(sockFD);
|
||
sockFD = -1;
|
||
}
|
||
}
|