/*      $NetBSD: irp_sv.c,v 1.1.1.2 2012/09/09 16:07:57 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_sv.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 <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 */

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