common/irs/irp_sv.c

	irp_sv.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * Copyright (c) 1999 by Sun Microsystems, Inc.
 * All rights reserved.
 */

/*
 * 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM 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.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "$Id: irp_sv.c,v 8.1 1999/01/18 07:46:54 vixie Exp $";
#endif /* LIBC_SCCS and not lint */

/* extern */

#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);
}


/*
 * struct servent * sv_next(struct irs_sv *this)
 *
 * Notes:
 *
 *  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);
    }
}