/* $NetBSD: irp_ho.c,v 1.1.1.2 2012/09/09 16:07:58 christos Exp $ */
/*
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Portions Copyright (c) 1996,1998 by Internet Software Consortium.
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "Id: irp_ho.c,v 1.3 2005/04/27 04:56:28 sra Exp ";
#endif /* LIBC_SCCS and not lint */
/* Imports. */
#include "port_before.h"
#include <syslog.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <resolv.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <irs.h>
#include <irp.h>
#include <isc/irpmarshall.h>
#include <isc/memcluster.h>
#include "irs_p.h"
#include "dns_p.h"
#include "irp_p.h"
#include "port_after.h"
/* Definitions. */
#define MAXALIASES 35
#define MAXADDRS 35
#define Max(a,b) ((a) > (b) ? (a) : (b))
struct pvt {
struct irp_p *girpdata;
int warned;
struct hostent host;
};
/* Forward. */
static void ho_close(struct irs_ho *this);
static struct hostent * ho_byname(struct irs_ho *this, const char *name);
static struct hostent * ho_byname2(struct irs_ho *this, const char *name,
int af);
static struct hostent * ho_byaddr(struct irs_ho *this, const void *addr,
int len, int af);
static struct hostent * ho_next(struct irs_ho *this);
static void ho_rewind(struct irs_ho *this);
static void ho_minimize(struct irs_ho *this);
static void free_host(struct hostent *ho);
static struct addrinfo * ho_addrinfo(struct irs_ho *this, const char *name,
const struct addrinfo *pai);
/* Public. */
/*%
* struct irs_ho * irs_irp_ho(struct irs_acc *this)
*
* Notes:
*
* Initializes the irp_ho module.
*
*/
struct irs_ho *
irs_irp_ho(struct irs_acc *this) {
struct irs_ho *ho;
struct pvt *pvt;
if (!(ho = memget(sizeof *ho))) {
errno = ENOMEM;
return (NULL);
}
memset(ho, 0x0, sizeof *ho);
if (!(pvt = memget(sizeof *pvt))) {
memput(ho, sizeof *ho);
errno = ENOMEM;
return (NULL);
}
memset(pvt, 0, sizeof *pvt);
pvt->girpdata = this->private;
ho->private = pvt;
ho->close = ho_close;
ho->byname = ho_byname;
ho->byname2 = ho_byname2;
ho->byaddr = ho_byaddr;
ho->next = ho_next;
ho->rewind = ho_rewind;
ho->minimize = ho_minimize;
ho->addrinfo = ho_addrinfo;
return (ho);
}
/* Methods. */
/*%
* Closes down the module.
*
*/
static void
ho_close(struct irs_ho *this) {
struct pvt *pvt = (struct pvt *)this->private;
ho_minimize(this);
free_host(&pvt->host);
memput(pvt, sizeof *pvt);
memput(this, sizeof *this);
}
/*
* struct hostent * ho_byname(struct irs_ho *this, const char *name)
*
*/
static struct hostent *
ho_byname(struct irs_ho *this, const char *name) {
return (ho_byname2(this, name, AF_INET));
}
/*
* struct hostent * ho_byname2(struct irs_ho *this, const char *name, int af)
*
*/
static struct hostent *
ho_byname2(struct irs_ho *this, const char *name, int af) {
struct pvt *pvt = (struct pvt *)this->private;
struct hostent *ho = &pvt->host;
char *body = NULL;
size_t bodylen;
int code;
char text[256];
if (ho->h_name != NULL &&
strcmp(name, ho->h_name) == 0 &&
af == ho->h_addrtype) {
return (ho);
}
if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
return (NULL);
}
if (irs_irp_send_command(pvt->girpdata, "gethostbyname2 %s %s",
name, ADDR_T_STR(af)) != 0)
return (NULL);
if (irs_irp_get_full_response(pvt->girpdata, &code,
text, sizeof text,
&body, &bodylen) != 0) {
return (NULL);
}
if (code == IRPD_GETHOST_OK) {
free_host(ho);
if (irp_unmarshall_ho(ho, body) != 0) {
ho = NULL;
}
} else {
ho = NULL;
}
if (body != NULL) {
memput(body, bodylen);
}
return (ho);
}
/*
* struct hostent * ho_byaddr(struct irs_ho *this, const void *addr,
* int len, int af)
*
*/
static struct hostent *
ho_byaddr(struct irs_ho *this, const void *addr, int len, int af) {
struct pvt *pvt = (struct pvt *)this->private;
struct hostent *ho = &pvt->host;
char *body = NULL;
size_t bodylen;
int code;
char **p;
char paddr[MAXPADDRSIZE];
char text[256];
if (ho->h_name != NULL &&
af == ho->h_addrtype &&
len == ho->h_length) {
for (p = ho->h_addr_list ; *p != NULL ; p++) {
if (memcmp(*p, addr, len) == 0)
return (ho);
}
}
if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
return (NULL);
}
if (inet_ntop(af, addr, paddr, sizeof paddr) == NULL) {
return (NULL);
}
if (irs_irp_send_command(pvt->girpdata, "gethostbyaddr %s %s",
paddr, ADDR_T_STR(af)) != 0) {
return (NULL);
}
if (irs_irp_get_full_response(pvt->girpdata, &code,
text, sizeof text,
&body, &bodylen) != 0) {
return (NULL);
}
if (code == IRPD_GETHOST_OK) {
free_host(ho);
if (irp_unmarshall_ho(ho, body) != 0) {
ho = NULL;
}
} else {
ho = NULL;
}
if (body != NULL) {
memput(body, bodylen);
}
return (ho);
}
/*%
* The implementation for gethostent(3). The first time it's
* called all the data is pulled from the remote(i.e. what
* the maximum number of gethostent(3) calls would return)
* and that data is cached.
*
*/
static struct hostent *
ho_next(struct irs_ho *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct hostent *ho = &pvt->host;
char *body;
size_t bodylen;
int code;
char text[256];
if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
return (NULL);
}
if (irs_irp_send_command(pvt->girpdata, "gethostent") != 0) {
return (NULL);
}
if (irs_irp_get_full_response(pvt->girpdata, &code,
text, sizeof text,
&body, &bodylen) != 0) {
return (NULL);
}
if (code == IRPD_GETHOST_OK) {
free_host(ho);
if (irp_unmarshall_ho(ho, body) != 0) {
ho = NULL;
}
} else {
ho = NULL;
}
if (body != NULL) {
memput(body, bodylen);
}
return (ho);
}
/*%
* void ho_rewind(struct irs_ho *this)
*
*/
static void
ho_rewind(struct irs_ho *this) {
struct pvt *pvt = (struct pvt *)this->private;
char text[256];
int code;
if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
return;
}
if (irs_irp_send_command(pvt->girpdata, "sethostent") != 0) {
return;
}
code = irs_irp_read_response(pvt->girpdata, text, sizeof text);
if (code != IRPD_GETHOST_SETOK) {
if (irp_log_errors) {
syslog(LOG_WARNING, "sethostent failed: %s", text);
}
}
return;
}
/*%
* void ho_minimize(struct irs_ho *this)
*
*/
static void
ho_minimize(struct irs_ho *this) {
struct pvt *pvt = (struct pvt *)this->private;
free_host(&pvt->host);
irs_irp_disconnect(pvt->girpdata);
}
/*%
* void free_host(struct hostent *ho)
*
*/
static void
free_host(struct hostent *ho) {
char **p;
if (ho == NULL) {
return;
}
if (ho->h_name != NULL)
free(ho->h_name);
if (ho->h_aliases != NULL) {
for (p = ho->h_aliases ; *p != NULL ; p++)
free(*p);
free(ho->h_aliases);
}
if (ho->h_addr_list != NULL) {
for (p = ho->h_addr_list ; *p != NULL ; p++)
free(*p);
free(ho->h_addr_list);
}
}
/* dummy */
static struct addrinfo *
ho_addrinfo(struct irs_ho *this, const char *name, const struct addrinfo *pai)
{
UNUSED(this);
UNUSED(name);
UNUSED(pai);
return(NULL);
}
/*! \file */