/*
 * 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.
 */

#include "port_before.h"

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

#ifdef IRS_LCL_SV_DB
#include <db.h>
#endif
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <syslog.h>

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

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

#include "port_after.h"

/* Types */

struct pvt {
        struct irp_p           *girpdata;
        int                     warned;
        struct servent          service;
};

/* Forward */

static void                     sv_close(struct irs_sv*);
static struct servent *         sv_next(struct irs_sv *);
static struct servent *         sv_byname(struct irs_sv *, const char *,
                                          const char *);
static struct servent *         sv_byport(struct irs_sv *, int, const char *);
static void                     sv_rewind(struct irs_sv *);
static void                     sv_minimize(struct irs_sv *);

static void                     free_service(struct servent *sv);



/* Public */

/*%
 * struct irs_sv * irs_irp_sv(struct irs_acc *this)
 *
 */

struct irs_sv *
irs_irp_sv(struct irs_acc *this) {
        struct irs_sv *sv;
        struct pvt *pvt;

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

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

        sv->private = pvt;
        sv->close = sv_close;
        sv->next = sv_next;
        sv->byname = sv_byname;
        sv->byport = sv_byport;
        sv->rewind = sv_rewind;
        sv->minimize = sv_minimize;

        return (sv);
}

/* Methods */

/*%
 * void sv_close(struct irs_sv *this)
 *
 */

static void
sv_close(struct irs_sv *this) {
        struct pvt *pvt = (struct pvt *)this->private;

        sv_minimize(this);

        free_service(&pvt->service);

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

/*%
 *      Fills the cache if necessary and returns the next item from it.
 *
 */

static struct servent *
sv_next(struct irs_sv *this) {
        struct pvt *pvt = (struct pvt *)this->private;
        struct servent *sv = &pvt->service;
        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, "getservent") != 0) {
                return (NULL);
        }

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

        if (code == IRPD_GETSERVICE_OK) {
                free_service(sv);
                if (irp_unmarshall_sv(sv, body) != 0) {
                        sv = NULL;
                }
        } else {
                sv = NULL;
        }

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

        return (sv);
}

/*%
 * struct servent * sv_byname(struct irs_sv *this, const char *name,
 *                              const char *proto)
 *
 */

static struct servent *
sv_byname(struct irs_sv *this, const char *name, const char *proto) {
        struct pvt *pvt = (struct pvt *)this->private;
        struct servent *sv = &pvt->service;
        char *body;
        char text[256];
        size_t bodylen;
        int code;

        if (sv->s_name != NULL &&
            strcmp(name, sv->s_name) == 0 &&
            strcasecmp(proto, sv->s_proto) == 0) {
                return (sv);
        }

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

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

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

        if (code == IRPD_GETSERVICE_OK) {
                free_service(sv);
                if (irp_unmarshall_sv(sv, body) != 0) {
                        sv = NULL;
                }
        } else {
                sv = NULL;
        }

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

        return (sv);
}

/*%
 * struct servent * sv_byport(struct irs_sv *this, int port,
 *                              const char *proto)
 *
 */

static struct servent *
sv_byport(struct irs_sv *this, int port, const char *proto) {
        struct pvt *pvt = (struct pvt *)this->private;
        struct servent *sv = &pvt->service;
        char *body;
        size_t bodylen;
        char text[256];
        int code;

        if (sv->s_name != NULL &&
            port == sv->s_port &&
            strcasecmp(proto, sv->s_proto) == 0) {
                return (sv);
        }

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

        if (irs_irp_send_command(pvt->girpdata, "getservbyport %d %s",
                                 ntohs((short)port), proto) != 0) {
                return (NULL);
        }

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

        if (code == IRPD_GETSERVICE_OK) {
                free_service(sv);
                if (irp_unmarshall_sv(sv, body) != 0) {
                        sv = NULL;
                }
        } else {
                sv = NULL;
        }

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

        return (sv);
}

/*%
 * void sv_rewind(struct irs_sv *this)
 *
 */

static void
sv_rewind(struct irs_sv *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, "setservent") != 0) {
                return;
        }

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

        return;
}

/*%
 * void sv_minimize(struct irs_sv *this)
 *
 */

static void
sv_minimize(struct irs_sv *this) {
        struct pvt *pvt = (struct pvt *)this->private;

        irs_irp_disconnect(pvt->girpdata);
}






static void
free_service(struct servent *sv) {
        char **p;

        if (sv == NULL) {
                return;
        }

        if (sv->s_name != NULL) {
                free(sv->s_name);
        }

        for (p = sv->s_aliases ; p != NULL && *p != NULL ; p++) {
                free(*p);
        }

        if (sv->s_proto != NULL) {
                free(sv->s_proto);
        }
}



/*! \file */