/*      $NetBSD: irp_nw.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_nw.c,v 1.4 2006/03/09 23:57:56 marka Exp ";
#endif /* LIBC_SCCS and not lint */

#if 0

#endif

/* Imports */

#include "port_before.h"

#include <syslog.h>
#include <sys/types.h>
#include <sys/socket.h>

#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>

#include <errno.h>
#include <fcntl.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 <isc/misc.h>

#include "irs_p.h"
#include "lcl_p.h"
#include "irp_p.h"

#include "port_after.h"

#define MAXALIASES 35
#define MAXADDRSIZE 4

struct pvt {
       struct irp_p           *girpdata;
       int                     warned;
       struct nwent            net;
};

/* Forward */

static void             nw_close(struct irs_nw *);
static struct nwent *   nw_byname(struct irs_nw *, const char *, int);
static struct nwent *   nw_byaddr(struct irs_nw *, void *, int, int);
static struct nwent *   nw_next(struct irs_nw *);
static void             nw_rewind(struct irs_nw *);
static void             nw_minimize(struct irs_nw *);

static void             free_nw(struct nwent *nw);


/* Public */

/*%
* struct irs_nw * irs_irp_nw(struct irs_acc *this)
*
*/

struct irs_nw *
irs_irp_nw(struct irs_acc *this) {
       struct irs_nw *nw;
       struct pvt *pvt;

       if (!(pvt = memget(sizeof *pvt))) {
               errno = ENOMEM;
               return (NULL);
       }
       memset(pvt, 0, sizeof *pvt);

       if (!(nw = memget(sizeof *nw))) {
               memput(pvt, sizeof *pvt);
               errno = ENOMEM;
               return (NULL);
       }
       memset(nw, 0x0, sizeof *nw);
       pvt->girpdata = this->private;

       nw->private = pvt;
       nw->close = nw_close;
       nw->byname = nw_byname;
       nw->byaddr = nw_byaddr;
       nw->next = nw_next;
       nw->rewind = nw_rewind;
       nw->minimize = nw_minimize;
       return (nw);
}

/* Methods */

/*%
* void nw_close(struct irs_nw *this)
*
*/

static void
nw_close(struct irs_nw *this) {
       struct pvt *pvt = (struct pvt *)this->private;

       nw_minimize(this);

       free_nw(&pvt->net);

       memput(pvt, sizeof *pvt);
       memput(this, sizeof *this);
}

/*%
* struct nwent * nw_byaddr(struct irs_nw *this, void *net,
*                              int length, int type)
*
*/

static struct nwent *
nw_byaddr(struct irs_nw *this, void *net, int length, int type) {
       struct pvt *pvt = (struct pvt *)this->private;
       struct nwent *nw = &pvt->net;
       char *body = NULL;
       size_t bodylen;
       int code;
       char paddr[24];                 /*%< bigenough for ip4 w/ cidr spec. */
       char text[256];

       if (inet_net_ntop(type, net, length, paddr, sizeof paddr) == NULL) {
               return (NULL);
       }

       if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
               return (NULL);
       }

       if (irs_irp_send_command(pvt->girpdata, "getnetbyaddr %s %s",
                                paddr, ADDR_T_STR(type)) != 0)
               return (NULL);

       if (irs_irp_get_full_response(pvt->girpdata, &code,
                                     text, sizeof text,
                                     &body, &bodylen) != 0) {
               return (NULL);
       }

       if (code == IRPD_GETNET_OK) {
               free_nw(nw);
               if (irp_unmarshall_nw(nw, body) != 0) {
                       nw = NULL;
               }
       } else {
               nw = NULL;
       }

       if (body != NULL) {
               memput(body, bodylen);
       }

       return (nw);
}

/*%
* struct nwent * nw_byname(struct irs_nw *this, const char *name, int type)
*
*/

static struct nwent *
nw_byname(struct irs_nw *this, const char *name, int type) {
       struct pvt *pvt = (struct pvt *)this->private;
       struct nwent *nw = &pvt->net;
       char *body = NULL;
       size_t bodylen;
       int code;
       char text[256];

       if (nw->n_name != NULL &&
           strcmp(name, nw->n_name) == 0 &&
           nw->n_addrtype == type) {
               return (nw);
       }

       if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
               return (NULL);
       }

       if (irs_irp_send_command(pvt->girpdata, "getnetbyname %s", name) != 0)
               return (NULL);

       if (irs_irp_get_full_response(pvt->girpdata, &code,
                                     text, sizeof text,
                                     &body, &bodylen) != 0) {
               return (NULL);
       }

       if (code == IRPD_GETNET_OK) {
               free_nw(nw);
               if (irp_unmarshall_nw(nw, body) != 0) {
                       nw = NULL;
               }
       } else {
               nw = NULL;
       }

       if (body != NULL) {
               memput(body, bodylen);
       }

       return (nw);
}

/*%
* void nw_rewind(struct irs_nw *this)
*
*/

static void
nw_rewind(struct irs_nw *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, "setnetent") != 0) {
               return;
       }

       code = irs_irp_read_response(pvt->girpdata, text, sizeof text);
       if (code != IRPD_GETNET_SETOK) {
               if (irp_log_errors) {
                       syslog(LOG_WARNING, "setnetent failed: %s", text);
               }
       }

       return;
}

/*%
*      Prepares the cache if necessary and returns the first, or
*      next item from it.
*/

static struct nwent *
nw_next(struct irs_nw *this) {
       struct pvt *pvt = (struct pvt *)this->private;
       struct nwent *nw = &pvt->net;
       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, "getnetent") != 0) {
               return (NULL);
       }

       if (irs_irp_get_full_response(pvt->girpdata, &code,
                                     text, sizeof text,
                                     &body, &bodylen) != 0) {
               return (NULL);
       }

       if (code == IRPD_GETNET_OK) {
               free_nw(nw);
               if (irp_unmarshall_nw(nw, body) != 0) {
                       nw = NULL;
               }
       } else {
               nw = NULL;
       }

       if (body != NULL)
               memput(body, bodylen);
       return (nw);
}

/*%
* void nw_minimize(struct irs_nw *this)
*
*/

static void
nw_minimize(struct irs_nw *this) {
       struct pvt *pvt = (struct pvt *)this->private;

       irs_irp_disconnect(pvt->girpdata);
}




/* private. */

/*%
*      deallocate all the memory irp_unmarshall_pw allocated.
*
*/

static void
free_nw(struct nwent *nw) {
       char **p;

       if (nw == NULL)
               return;

       if (nw->n_name != NULL)
               free(nw->n_name);

       if (nw->n_aliases != NULL) {
               for (p = nw->n_aliases ; *p != NULL ; p++) {
                       free(*p);
               }
               free(nw->n_aliases);
       }

       if (nw->n_addr != NULL)
               free(nw->n_addr);
}

/*! \file */

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