/*
 * 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.
 */

#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 */