6b6ac9438f
package does have BXA export approval, but the licensing strings on the dnssafe code are a bit unpleasant. The crypto is easy to restore and bind will run without it - just without full dnssec support. Obtained from: The Internet Software Consortium (www.isc.org)
419 lines
7.7 KiB
C
419 lines
7.7 KiB
C
/*
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* Portions Copyright (c) 1996,1998 by Internet Software Consortium.
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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.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM 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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#if defined(LIBC_SCCS) && !defined(lint)
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static const char rcsid[] = "$Id: irp_ho.c,v 8.2 1999/10/13 16:39:31 vixie Exp $";
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#endif /* LIBC_SCCS and not lint */
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/* Imports. */
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#include "port_before.h"
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#include <syslog.h>
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#include <sys/types.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/inet.h>
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#include <arpa/nameser.h>
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.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 <syslog.h>
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#include <irs.h>
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#include <irp.h>
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#include <isc/irpmarshall.h>
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#include <isc/memcluster.h>
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#include "irs_p.h"
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#include "dns_p.h"
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#include "irp_p.h"
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#include "port_after.h"
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/* Definitions. */
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#define MAXALIASES 35
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#define MAXADDRS 35
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#define Max(a,b) ((a) > (b) ? (a) : (b))
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struct pvt {
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struct irp_p *girpdata;
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int warned;
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struct hostent host;
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};
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/* Forward. */
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static void ho_close(struct irs_ho *this);
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static struct hostent * ho_byname(struct irs_ho *this, const char *name);
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static struct hostent * ho_byname2(struct irs_ho *this, const char *name,
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int af);
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static struct hostent * ho_byaddr(struct irs_ho *this, const void *addr,
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int len, int af);
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static struct hostent * ho_next(struct irs_ho *this);
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static void ho_rewind(struct irs_ho *this);
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static void ho_minimize(struct irs_ho *this);
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static void free_host(struct hostent *ho);
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/* Public. */
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/*
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* struct irs_ho * irs_irp_ho(struct irs_acc *this)
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*
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* Notes:
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*
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* Initializes the irp_ho module.
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*
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*/
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struct irs_ho *
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irs_irp_ho(struct irs_acc *this) {
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struct irs_ho *ho;
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struct pvt *pvt;
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if (!(ho = memget(sizeof *ho))) {
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errno = ENOMEM;
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return (NULL);
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}
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memset(ho, 0x0, sizeof *ho);
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if (!(pvt = memget(sizeof *pvt))) {
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memput(ho, sizeof *ho);
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errno = ENOMEM;
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return (NULL);
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}
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memset(pvt, 0, sizeof *pvt);
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pvt->girpdata = this->private;
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ho->private = pvt;
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ho->close = ho_close;
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ho->byname = ho_byname;
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ho->byname2 = ho_byname2;
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ho->byaddr = ho_byaddr;
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ho->next = ho_next;
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ho->rewind = ho_rewind;
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ho->minimize = ho_minimize;
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return (ho);
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}
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/* Methods. */
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/*
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* void ho_close(struct irs_ho *this)
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*
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* Notes:
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*
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* Closes down the module.
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*
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*/
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static void
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ho_close(struct irs_ho *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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ho_minimize(this);
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free_host(&pvt->host);
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memput(pvt, sizeof *pvt);
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memput(this, sizeof *this);
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}
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/*
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* struct hostent * ho_byname(struct irs_ho *this, const char *name)
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*
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*/
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static struct hostent *
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ho_byname(struct irs_ho *this, const char *name) {
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return (ho_byname2(this, name, AF_INET));
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}
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/*
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* struct hostent * ho_byname2(struct irs_ho *this, const char *name, int af)
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*
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*/
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static struct hostent *
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ho_byname2(struct irs_ho *this, const char *name, int af) {
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struct pvt *pvt = (struct pvt *)this->private;
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struct hostent *ho = &pvt->host;
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char *body = NULL;
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size_t bodylen;
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int code;
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char text[256];
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if (ho->h_name != NULL &&
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strcmp(name, ho->h_name) == 0 &&
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af == ho->h_addrtype) {
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return (ho);
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}
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if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
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return (NULL);
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}
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if (irs_irp_send_command(pvt->girpdata, "gethostbyname2 %s %s",
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name, ADDR_T_STR(af)) != 0)
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return (NULL);
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if (irs_irp_get_full_response(pvt->girpdata, &code,
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text, sizeof text,
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&body, &bodylen) != 0) {
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return (NULL);
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}
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if (code == IRPD_GETHOST_OK) {
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free_host(ho);
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if (irp_unmarshall_ho(ho, body) != 0) {
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ho = NULL;
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}
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} else {
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ho = NULL;
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}
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if (body != NULL) {
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memput(body, bodylen);
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}
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return (ho);
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}
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/*
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* struct hostent * ho_byaddr(struct irs_ho *this, const void *addr,
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* int len, int af)
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*
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*/
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static struct hostent *
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ho_byaddr(struct irs_ho *this, const void *addr, int len, int af) {
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struct pvt *pvt = (struct pvt *)this->private;
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struct hostent *ho = &pvt->host;
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char *body = NULL;
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size_t bodylen;
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int code;
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char **p;
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char paddr[MAXPADDRSIZE];
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char text[256];
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if (ho->h_name != NULL &&
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af == ho->h_addrtype &&
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len == ho->h_length) {
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for (p = ho->h_addr_list ; *p != NULL ; p++) {
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if (memcmp(*p, addr, len) == 0)
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return (ho);
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}
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}
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if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
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return (NULL);
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}
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if (inet_ntop(af, addr, paddr, sizeof paddr) == NULL) {
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return (NULL);
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}
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if (irs_irp_send_command(pvt->girpdata, "gethostbyaddr %s %s",
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paddr, ADDR_T_STR(af)) != 0) {
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return (NULL);
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}
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if (irs_irp_get_full_response(pvt->girpdata, &code,
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text, sizeof text,
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&body, &bodylen) != 0) {
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return (NULL);
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}
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if (code == IRPD_GETHOST_OK) {
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free_host(ho);
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if (irp_unmarshall_ho(ho, body) != 0) {
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ho = NULL;
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}
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} else {
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ho = NULL;
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}
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if (body != NULL) {
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memput(body, bodylen);
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}
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return (ho);
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}
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/*
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* struct hostent * ho_next(struct irs_ho *this)
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*
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* Notes:
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*
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* The implementation for gethostent(3). The first time it's
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* called all the data is pulled from the remote(i.e. what
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* the maximum number of gethostent(3) calls would return)
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* and that data is cached.
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*
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*/
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static struct hostent *
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ho_next(struct irs_ho *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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struct hostent *ho = &pvt->host;
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char *body;
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size_t bodylen;
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int code;
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char text[256];
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if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
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return (NULL);
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}
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if (irs_irp_send_command(pvt->girpdata, "gethostent") != 0) {
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return (NULL);
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}
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if (irs_irp_get_full_response(pvt->girpdata, &code,
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text, sizeof text,
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&body, &bodylen) != 0) {
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return (NULL);
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}
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if (code == IRPD_GETHOST_OK) {
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free_host(ho);
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if (irp_unmarshall_ho(ho, body) != 0) {
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ho = NULL;
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}
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} else {
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ho = NULL;
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}
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if (body != NULL) {
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memput(body, bodylen);
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}
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return (ho);
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}
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/*
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* void ho_rewind(struct irs_ho *this)
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*
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*/
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static void
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ho_rewind(struct irs_ho *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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char text[256];
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int code;
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if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
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return;
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}
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if (irs_irp_send_command(pvt->girpdata, "sethostent") != 0) {
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return;
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}
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code = irs_irp_read_response(pvt->girpdata, text, sizeof text);
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if (code != IRPD_GETHOST_SETOK) {
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if (irp_log_errors) {
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syslog(LOG_WARNING, "sethostent failed: %s", text);
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}
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}
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return;
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}
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/*
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* void ho_minimize(struct irs_ho *this)
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*
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*/
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static void
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ho_minimize(struct irs_ho *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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free_host(&pvt->host);
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irs_irp_disconnect(pvt->girpdata);
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}
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/*
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* void free_host(struct hostent *ho)
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*
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*/
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static void
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free_host(struct hostent *ho) {
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char **p;
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if (ho == NULL) {
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return;
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}
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if (ho->h_name != NULL)
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free(ho->h_name);
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if (ho->h_aliases != NULL) {
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for (p = ho->h_aliases ; *p != NULL ; p++)
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free(*p);
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free(ho->h_aliases);
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}
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if (ho->h_addr_list != NULL) {
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for (p = ho->h_addr_list ; *p != NULL ; p++)
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free(*p);
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free(ho->h_addr_list);
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}
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}
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