usr/src/lib/libslp/clib/SLPGetRefreshInterval.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 1999 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 /*
  30  * Implements SLPGetRefreshInterval. This call is an AttrRqst with
  31  * the special service type service:directory-agent.sun, sent
  32  * only to slpd via loopback, so it mimics the course of a normal
  33  * SLPFindAttrs call but reroutes the message to slpd.
  34  */
  35
  36 #include <stdlib.h>
  37 #include <unistd.h>
  38 #include <syslog.h>
  39 #include <netdb.h>
  40 #include <slp-internal.h>
  41
  42 static SLPBoolean refresh_interval_cb(SLPHandle, const char *,
  43                                         SLPError, void *);
  44
  45 unsigned short SLPGetRefreshInterval() {
  46         slp_handle_impl_t *hp;  /* SLP handle for this request */
  47         SLPError err;           /* any SLPError */
  48         char *reply = NULL;     /* reply from slpd */
  49         void *collator = NULL;  /* attr collation handle */
  50         int mr = 0;             /* max results placeholder */
  51         unsigned short max = 0; /* max interval result cookie */
  52         char *msg = NULL;       /* attrrqst msg */
  53         char hostname[MAXHOSTNAMELEN];  /* name of this host */
  54
  55         if ((err = SLPOpen("en", SLP_FALSE, (void **)&hp)) != SLP_OK) {
  56             slp_err(LOG_INFO, 0, "SLPGetRefreshInterval",
  57                     "Could not get SLPHandle: %s", slp_strerror(err));
  58             return (0);
  59         }
  60
  61         /* tag this as an internal call */
  62         hp->internal_call = SLP_TRUE;
  63
  64         /* scope is name of this host */
  65         (void) gethostname(hostname, MAXHOSTNAMELEN);
  66
  67         if (slp_packAttrRqst_single(SLP_SUN_DA_TYPE,
  68                                     hostname,
  69                                     "min-refresh-interval",
  70                                     &msg, "en") != SLP_OK) {
  71             goto done;
  72         }
  73
  74         if (slp_send2slpd(msg, &reply) != SLP_OK) {
  75             goto done;
  76         }
  77
  78         (void) slp_UnpackAttrReply(hp, reply, refresh_interval_cb,
  79                                     &max, &collator, &mr);
  80
  81         /* clean up by invoking last call */
  82         (void) slp_UnpackAttrReply(hp, NULL, refresh_interval_cb,
  83                                     &max, &collator, &mr);
  84
  85 done:
  86         if (msg) free(msg);
  87         if (reply) free(reply);
  88
  89         SLPClose(hp);
  90
  91         return (max);
  92 }
  93
  94 /*ARGSUSED*/
  95 static SLPBoolean refresh_interval_cb(SLPHandle h, const char *attrs,
  96                                         SLPError err, void *cookie) {
  97         char *p, *next;
  98         unsigned short *max = (unsigned short *)cookie;
  99
 100         if (err != SLP_OK) {
 101             return (SLP_TRUE);
 102         }
 103
 104         p = strchr(attrs, '=');
 105         if (!p) {
 106             *max = 0;
 107         }
 108
 109         /* walk through all intervals, looking for the greatest */
 110         for (p++; p; p = next) {
 111             unsigned short anint;
 112
 113             next = strchr(p, ',');
 114             if (next) {
 115                 *next++ = 0;
 116             }
 117
 118             anint = (unsigned short)atoi(p);
 119             if (anint > *max) {
 120                 *max = anint;
 121             }
 122         }
 123
 124         return (SLP_TRUE);
 125 }