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Diffstat (limited to 'contrib/bind/bin/nslookup/subr.c')
| -rw-r--r-- | contrib/bind/bin/nslookup/subr.c | 475 |
1 files changed, 475 insertions, 0 deletions
diff --git a/contrib/bind/bin/nslookup/subr.c b/contrib/bind/bin/nslookup/subr.c new file mode 100644 index 0000000..cefc2eb --- /dev/null +++ b/contrib/bind/bin/nslookup/subr.c @@ -0,0 +1,475 @@ +/* + * Copyright (c) 1985, 1989 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Portions Copyright (c) 1993 by Digital Equipment Corporation. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies, and that + * the name of Digital Equipment Corporation not be used in advertising or + * publicity pertaining to distribution of the document or software without + * specific, written prior permission. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL + * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT + * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL + * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR + * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS + * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS + * SOFTWARE. + */ + +#ifndef lint +static char sccsid[] = "@(#)subr.c 5.24 (Berkeley) 3/2/91"; +static char rcsid[] = "$Id: subr.c,v 8.9 1997/04/25 00:27:19 vixie Exp $"; +#endif /* not lint */ + +/* + ******************************************************************************* + * + * subr.c -- + * + * Miscellaneous subroutines for the name server + * lookup program. + * + * Copyright (c) 1985 + * Andrew Cherenson + * U.C. Berkeley + * CS298-26 Fall 1985 + * + ******************************************************************************* + */ + +#include "port_before.h" + +#include <sys/types.h> +#include <sys/param.h> +#include <sys/socket.h> + +#include <netinet/in.h> +#include <arpa/nameser.h> +#include <arpa/inet.h> + +#include <netdb.h> +#include <setjmp.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "port_after.h" + +#include "resolv.h" +#include "res.h" + +/* + ******************************************************************************* + * + * IntrHandler -- + * + * This routine is called whenever a control-C is typed. + * It performs three main functions: + * - closes an open socket connection, + * - closes an open output file (used by LookupHost, et al.), + * - jumps back to the main read-eval loop. + * + * If a user types a ^C in the middle of a routine that uses a socket, + * the routine would not be able to close the socket. To prevent an + * overflow of the process's open file table, the socket and output + * file descriptors are closed by the interrupt handler. + * + * Side effects: + * Open file descriptors are closed. + * If filePtr is valid, it is closed. + * Flow of control returns to the main() routine. + * + ******************************************************************************* + */ + +SIG_FN +IntrHandler() +{ + extern jmp_buf env; +#if defined(BSD) && BSD >= 199006 && !defined(RISCOS_BSD) && !defined(__osf__) + extern FILE *yyin; /* scanner input file */ + extern void yyrestart(); /* routine to restart scanner after interrupt */ +#endif + + SendRequest_close(); + ListHost_close(); + if (filePtr != NULL && filePtr != stdout) { + fclose(filePtr); + filePtr = NULL; + } + printf("\n"); +#if defined(BSD) && BSD >= 199006 && !defined(RISCOS_BSD) && !defined(__osf__) + yyrestart(yyin); +#endif + longjmp(env, 1); +} + + +/* + ******************************************************************************* + * + * Malloc -- + * Calloc -- + * + * Calls the malloc library routine with SIGINT blocked to prevent + * corruption of malloc's data structures. We need to do this because + * a control-C doesn't kill the program -- it causes a return to the + * main command loop. + * + * NOTE: This method doesn't prevent the pointer returned by malloc + * from getting lost, so it is possible to get "core leaks". + * + * If malloc fails, the program exits. + * + * Results: + * (address) - address of new buffer. + * + ******************************************************************************* + */ + +char * +Malloc(size) + int size; +{ + char *ptr; + +#ifdef SYSV +#if defined(SVR3) || defined(SVR4) + sighold(SIGINT); + ptr = malloc((unsigned) size); + sigrelse(SIGINT); +#else + { SIG_FN (*old)(); + old = signal(SIGINT, SIG_IGN); + ptr = malloc((unsigned) size); + signal(SIGINT, old); + } +#endif +#else +#ifdef POSIX_SIGNALS + { sigset_t sset; + sigemptyset(&sset); + sigaddset(&sset,SIGINT); + sigprocmask(SIG_BLOCK,&sset,NULL); + ptr = malloc((unsigned) size); + sigprocmask(SIG_UNBLOCK,&sset,NULL); + } +#else + { int saveMask; + saveMask = sigblock(sigmask(SIGINT)); + ptr = malloc((unsigned) size); + (void) sigsetmask(saveMask); + } +#endif +#endif + if (ptr == NULL) { + fflush(stdout); + fprintf(stderr, "*** Can't allocate memory\n"); + fflush(stderr); + abort(); + /*NOTREACHED*/ + } else { + return(ptr); + } +} + +char * +Calloc(num, size) + register int num, size; +{ + char *ptr = Malloc(num*size); + memset(ptr, 0, num*size); + return(ptr); +} + + +/* + ******************************************************************************* + * + * PrintHostInfo -- + * + * Prints out the HostInfo structure for a host. + * + ******************************************************************************* + */ + +void +PrintHostInfo(file, title, hp) + FILE *file; + char *title; + register HostInfo *hp; +{ + register char **cp; + register ServerInfo **sp; + char comma; + int i; + + fprintf(file, "%-7s %s", title, hp->name); + + if (hp->addrList != NULL) { + if (hp->addrList[1] != NULL) { + fprintf(file, "\nAddresses:"); + } else { + fprintf(file, "\nAddress:"); + } + comma = ' '; + i = 0; + for (cp = hp->addrList; cp && *cp; cp++) { + i++; + if (i > 4) { + fprintf(file, "\n\t"); + comma = ' '; + i = 0; + } + fprintf(file,"%c %s", comma, inet_ntoa(*(struct in_addr *)*cp)); + comma = ','; + } + } + + if (hp->aliases != NULL) { + fprintf(file, "\nAliases:"); + comma = ' '; + i = 10; + for (cp = hp->aliases; cp && *cp && **cp; cp++) { + i += strlen(*cp) + 2; + if (i > 75) { + fprintf(file, "\n\t"); + comma = ' '; + i = 10; + } + fprintf(file, "%c %s", comma, *cp); + comma = ','; + } + } + + if (hp->servers != NULL) { + fprintf(file, "\nServed by:\n"); + for (sp = hp->servers; *sp != NULL ; sp++) { + + fprintf(file, "- %s\n\t", (*sp)->name); + + comma = ' '; + i = 0; + for (cp = (*sp)->addrList; cp && *cp && **cp; cp++) { + i++; + if (i > 4) { + fprintf(file, "\n\t"); + comma = ' '; + i = 0; + } + fprintf(file, + "%c %s", comma, inet_ntoa(*(struct in_addr *)*cp)); + comma = ','; + } + fprintf(file, "\n\t"); + + comma = ' '; + i = 10; + for (cp = (*sp)->domains; cp && *cp && **cp; cp++) { + i += strlen(*cp) + 2; + if (i > 75) { + fprintf(file, "\n\t"); + comma = ' '; + i = 10; + } + fprintf(file, "%c %s", comma, *cp); + comma = ','; + } + fprintf(file, "\n"); + } + } + + fprintf(file, "\n\n"); +} + +/* + ******************************************************************************* + * + * OpenFile -- + * + * Parses a command string for a file name and opens + * the file. + * + * Results: + * file pointer - the open was successful. + * NULL - there was an error opening the file or + * the input string was invalid. + * + ******************************************************************************* + */ + +FILE * +OpenFile(string, file) + char *string; + char *file; +{ + char *redirect; + FILE *tmpPtr; + + /* + * Open an output file if we see '>' or >>'. + * Check for overwrite (">") or concatenation (">>"). + */ + + redirect = strchr(string, '>'); + if (redirect == NULL) { + return(NULL); + } + if (redirect[1] == '>') { + sscanf(redirect, ">> %s", file); + tmpPtr = fopen(file, "a+"); + } else { + sscanf(redirect, "> %s", file); + tmpPtr = fopen(file, "w"); + } + + if (tmpPtr != NULL) { + redirect[0] = '\0'; + } + + return(tmpPtr); +} + +/* + ******************************************************************************* + * + * DecodeError -- + * + * Converts an error code into a character string. + * + ******************************************************************************* + */ + +const struct res_sym error_syms[] = { + { NOERROR, "Success" }, + { FORMERR, "Format error" }, + { SERVFAIL, "Server failed" }, + { NXDOMAIN, "Non-existent host/domain" }, + { NOTIMP, "Not implemented" }, + { REFUSED, "Query refused" }, +#ifdef NOCHANGE + { NOCHANGE, "No change" }, +#endif + { TIME_OUT, "Timed out" }, + { NO_INFO, "No information" }, + { ERROR, "Unspecified error" }, + { NONAUTH, "Non-authoritative answer" }, + { NO_RESPONSE, "No response from server" }, + { 0, NULL } +}; + +const char * +DecodeError(result) + int result; +{ + const char *string; + int success; + + string = sym_ntos(error_syms, result, &success); + if (success) + return string; + return ("BAD ERROR VALUE"); +} + + +int +StringToClass(class, dflt, errorfile) + char *class; + int dflt; + FILE *errorfile; +{ + int result, success; + + result = sym_ston(__p_class_syms, class, &success); + if (success) + return result; + + if (errorfile) + fprintf(errorfile, "unknown query class: %s\n", class); + return(dflt); +} + + +/* + ******************************************************************************* + * + * StringToType -- + * + * Converts a string form of a query type name to its + * corresponding integer value. + * + ******************************************************************************* + */ + +int +StringToType(type, dflt, errorfile) + char *type; + int dflt; + FILE *errorfile; +{ + int result, success; + + result = sym_ston(__p_type_syms, type, &success); + if (success) + return (result); + + if (errorfile) + fprintf(errorfile, "unknown query type: %s\n", type); + return (dflt); +} + +/* + ******************************************************************************* + * + * DecodeType -- + * + * Converts a query type to a descriptive name. + * (A more verbose form of p_type.) + * + * + ******************************************************************************* + */ + +const char * +DecodeType(type) + int type; +{ + + return (sym_ntop(__p_type_syms, type, (int *)0)); +} |
