/*      $NetBSD: irp_pr.c,v 1.1.1.2 2012/09/09 16:07:56 christos Exp $  */

/*
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Portions Copyright (c) 1996 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_pr.c,v 1.3 2005/04/27 04:56:29 sra Exp ";
#endif /* LIBC_SCCS and not lint */

/* extern */

#include "port_before.h"

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

#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <netdb.h>
#include <syslog.h>

#include <irs.h>
#include <irp.h>
#include <isc/memcluster.h>
#include <isc/irpmarshall.h>

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

#include "port_after.h"


#define MAXALIASES      35

/* Types */

struct pvt {
       struct irp_p           *girpdata;
       int                     warned;
       struct protoent         proto;
};

/* Forward */

static void                     pr_close(struct irs_pr *);
static struct protoent *        pr_next(struct irs_pr *);
static struct protoent *        pr_byname(struct irs_pr *, const char *);
static struct protoent *        pr_bynumber(struct irs_pr *, int);
static void                     pr_rewind(struct irs_pr *);
static void                     pr_minimize(struct irs_pr *);

static void                     free_proto(struct protoent *pr);

/* Public */

/*%
* struct irs_pr * irs_irp_pr(struct irs_acc *this)
*
*/

struct irs_pr *
irs_irp_pr(struct irs_acc *this) {
       struct irs_pr *pr;
       struct pvt *pvt;

       if (!(pr = memget(sizeof *pr))) {
               errno = ENOMEM;
               return (NULL);
       }
       memset(pr, 0x0, sizeof *pr);

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

       pr->private = pvt;
       pr->close = pr_close;
       pr->byname = pr_byname;
       pr->bynumber = pr_bynumber;
       pr->next = pr_next;
       pr->rewind = pr_rewind;
       pr->minimize = pr_minimize;
       return (pr);
}

/* Methods */

/*%
* void pr_close(struct irs_pr *this)
*
*/

static void
pr_close(struct irs_pr *this) {
       struct pvt *pvt = (struct pvt *)this->private;

       pr_minimize(this);

       free_proto(&pvt->proto);

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

/*%
* struct protoent * pr_byname(struct irs_pr *this, const char *name)
*
*/

static struct protoent *
pr_byname(struct irs_pr *this, const char *name) {
       struct pvt *pvt = (struct pvt *)this->private;
       struct protoent *pr = &pvt->proto;
       char *body = NULL;
       size_t bodylen;
       int code;
       int i;
       char text[256];

       if (pr->p_name != NULL && strcmp(name, pr->p_name) == 0) {
               return (pr);
       }

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

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

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

       if (code == IRPD_GETPROTO_OK) {
               free_proto(pr);
               if (irp_unmarshall_pr(pr, body) != 0) {
                       pr = NULL;
               }
       } else {
               pr = NULL;
       }

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

       return (pr);
}

/*%
* struct protoent * pr_bynumber(struct irs_pr *this, int proto)
*
*/

static struct protoent *
pr_bynumber(struct irs_pr *this, int proto) {
       struct pvt *pvt = (struct pvt *)this->private;
       struct protoent *pr = &pvt->proto;
       char *body = NULL;
       size_t bodylen;
       int code;
       int i;
       char text[256];

       if (pr->p_name != NULL && proto == pr->p_proto) {
               return (pr);
       }

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

       i = irs_irp_send_command(pvt->girpdata, "getprotobynumber %d", proto);
       if (i != 0)
               return (NULL);

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

       if (code == IRPD_GETPROTO_OK) {
               free_proto(pr);
               if (irp_unmarshall_pr(pr, body) != 0) {
                       pr = NULL;
               }
       } else {
               pr = NULL;
       }

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

       return (pr);
}

/*%
* void pr_rewind(struct irs_pr *this)
*
*/

static void
pr_rewind(struct irs_pr *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, "setprotoent") != 0) {
               return;
       }

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

       return;
}

/*%
*      Prepares the cache if necessary and returns the next item in it.
*
*/

static struct protoent *
pr_next(struct irs_pr *this) {
       struct pvt *pvt = (struct pvt *)this->private;
       struct protoent *pr = &pvt->proto;
       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, "getprotoent") != 0) {
               return (NULL);
       }

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

       if (code == IRPD_GETPROTO_OK) {
               free_proto(pr);
               if (irp_unmarshall_pr(pr, body) != 0) {
                       pr = NULL;
               }
       } else {
               pr = NULL;
       }

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

       return (pr);
}

/*%
* void pr_minimize(struct irs_pr *this)
*
*/

static void
pr_minimize(struct irs_pr *this) {
       struct pvt *pvt = (struct pvt *)this->private;

       irs_irp_disconnect(pvt->girpdata);
}

/*%
*      Deallocate all the memory irp_unmarshall_pr allocated.
*
*/

static void
free_proto(struct protoent *pr) {
       char **p;

       if (pr == NULL)
               return;

       if (pr->p_name != NULL)
               free(pr->p_name);

       for (p = pr->p_aliases ; p != NULL && *p != NULL ; p++)
               free(*p);
}

/*! \file */

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