external/bsd/libbind/dist/irs/irp_pr.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
   5  * Portions Copyright (c) 1996 by Internet Software Consortium.
   6  *
   7  * Permission to use, copy, modify, and distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  17  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 #if defined(LIBC_SCCS) && !defined(lint)
  21 static const char rcsid[] = "Id: irp_pr.c,v 1.3 2005/04/27 04:56:29 sra Exp";
  22 #endif /* LIBC_SCCS and not lint */
  23
  24 /* extern */
  25
  26 #include "port_before.h"
  27
  28 #include <syslog.h>
  29 #include <sys/types.h>
  30
  31 #include <errno.h>
  32 #include <fcntl.h>
  33 #include <string.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <netdb.h>
  37 #include <syslog.h>
  38
  39 #include <irs.h>
  40 #include <irp.h>
  41 #include <isc/memcluster.h>
  42 #include <isc/irpmarshall.h>
  43
  44 #include "irs_p.h"
  45 #include "lcl_p.h"
  46 #include "irp_p.h"
  47
  48 #include "port_after.h"
  49
  50
  51 #define MAXALIASES      35
  52
  53 /* Types */
  54
  55 struct pvt {
  56         struct irp_p           *girpdata;
  57         int                     warned;
  58         struct protoent         proto;
  59 };
  60
  61 /* Forward */
  62
  63 static void                     pr_close(struct irs_pr *);
  64 static struct protoent *        pr_next(struct irs_pr *);
  65 static struct protoent *        pr_byname(struct irs_pr *, const char *);
  66 static struct protoent *        pr_bynumber(struct irs_pr *, int);
  67 static void                     pr_rewind(struct irs_pr *);
  68 static void                     pr_minimize(struct irs_pr *);
  69
  70 static void                     free_proto(struct protoent *pr);
  71
  72 /* Public */
  73
  74 /*%
  75  * struct irs_pr * irs_irp_pr(struct irs_acc *this)
  76  *
  77  */
  78
  79 struct irs_pr *
  80 irs_irp_pr(struct irs_acc *this) {
  81         struct irs_pr *pr;
  82         struct pvt *pvt;
  83
  84         if (!(pr = memget(sizeof *pr))) {
  85                 errno = ENOMEM;
  86                 return (NULL);
  87         }
  88         memset(pr, 0x0, sizeof *pr);
  89
  90         if (!(pvt = memget(sizeof *pvt))) {
  91                 memput(pr, sizeof *pr);
  92                 errno = ENOMEM;
  93                 return (NULL);
  94         }
  95         memset(pvt, 0, sizeof *pvt);
  96         pvt->girpdata = this->private;
  97
  98         pr->private = pvt;
  99         pr->close = pr_close;
 100         pr->byname = pr_byname;
 101         pr->bynumber = pr_bynumber;
 102         pr->next = pr_next;
 103         pr->rewind = pr_rewind;
 104         pr->minimize = pr_minimize;
 105         return (pr);
 106 }
 107
 108 /* Methods */
 109
 110 /*%
 111  * void pr_close(struct irs_pr *this)
 112  *
 113  */
 114
 115 static void
 116 pr_close(struct irs_pr *this) {
 117         struct pvt *pvt = (struct pvt *)this->private;
 118
 119         pr_minimize(this);
 120
 121         free_proto(&pvt->proto);
 122
 123         memput(pvt, sizeof *pvt);
 124         memput(this, sizeof *this);
 125 }
 126
 127 /*%
 128  * struct protoent * pr_byname(struct irs_pr *this, const char *name)
 129  *
 130  */
 131
 132 static struct protoent *
 133 pr_byname(struct irs_pr *this, const char *name) {
 134         struct pvt *pvt = (struct pvt *)this->private;
 135         struct protoent *pr = &pvt->proto;
 136         char *body = NULL;
 137         size_t bodylen;
 138         int code;
 139         int i;
 140         char text[256];
 141
 142         if (pr->p_name != NULL && strcmp(name, pr->p_name) == 0) {
 143                 return (pr);
 144         }
 145
 146         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 147                 return (NULL);
 148         }
 149
 150         i = irs_irp_send_command(pvt->girpdata, "getprotobyname %s", name);
 151         if (i != 0)
 152                 return (NULL);
 153
 154         if (irs_irp_get_full_response(pvt->girpdata, &code,
 155                                       text, sizeof text,
 156                                       &body, &bodylen) != 0) {
 157                 return (NULL);
 158         }
 159
 160         if (code == IRPD_GETPROTO_OK) {
 161                 free_proto(pr);
 162                 if (irp_unmarshall_pr(pr, body) != 0) {
 163                         pr = NULL;
 164                 }
 165         } else {
 166                 pr = NULL;
 167         }
 168
 169         if (body != NULL) {
 170                 memput(body, bodylen);
 171         }
 172
 173         return (pr);
 174 }
 175
 176 /*%
 177  * struct protoent * pr_bynumber(struct irs_pr *this, int proto)
 178  *
 179  */
 180
 181 static struct protoent *
 182 pr_bynumber(struct irs_pr *this, int proto) {
 183         struct pvt *pvt = (struct pvt *)this->private;
 184         struct protoent *pr = &pvt->proto;
 185         char *body = NULL;
 186         size_t bodylen;
 187         int code;
 188         int i;
 189         char text[256];
 190
 191         if (pr->p_name != NULL && proto == pr->p_proto) {
 192                 return (pr);
 193         }
 194
 195         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 196                 return (NULL);
 197         }
 198
 199         i = irs_irp_send_command(pvt->girpdata, "getprotobynumber %d", proto);
 200         if (i != 0)
 201                 return (NULL);
 202
 203         if (irs_irp_get_full_response(pvt->girpdata, &code,
 204                                       text, sizeof text,
 205                                       &body, &bodylen) != 0) {
 206                 return (NULL);
 207         }
 208
 209         if (code == IRPD_GETPROTO_OK) {
 210                 free_proto(pr);
 211                 if (irp_unmarshall_pr(pr, body) != 0) {
 212                         pr = NULL;
 213                 }
 214         } else {
 215                 pr = NULL;
 216         }
 217
 218         if (body != NULL) {
 219                 memput(body, bodylen);
 220         }
 221
 222         return (pr);
 223 }
 224
 225 /*%
 226  * void pr_rewind(struct irs_pr *this)
 227  *
 228  */
 229
 230 static void
 231 pr_rewind(struct irs_pr *this) {
 232         struct pvt *pvt = (struct pvt *)this->private;
 233         char text[256];
 234         int code;
 235
 236         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 237                 return;
 238         }
 239
 240         if (irs_irp_send_command(pvt->girpdata, "setprotoent") != 0) {
 241                 return;
 242         }
 243
 244         code = irs_irp_read_response(pvt->girpdata, text, sizeof text);
 245         if (code != IRPD_GETPROTO_SETOK) {
 246                 if (irp_log_errors) {
 247                         syslog(LOG_WARNING, "setprotoent failed: %s", text);
 248                 }
 249         }
 250
 251         return;
 252 }
 253
 254 /*%
 255  *      Prepares the cache if necessary and returns the next item in it.
 256  *
 257  */
 258
 259 static struct protoent *
 260 pr_next(struct irs_pr *this) {
 261         struct pvt *pvt = (struct pvt *)this->private;
 262         struct protoent *pr = &pvt->proto;
 263         char *body;
 264         size_t bodylen;
 265         int code;
 266         char text[256];
 267
 268         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 269                 return (NULL);
 270         }
 271
 272         if (irs_irp_send_command(pvt->girpdata, "getprotoent") != 0) {
 273                 return (NULL);
 274         }
 275
 276         if (irs_irp_get_full_response(pvt->girpdata, &code,
 277                                       text, sizeof text,
 278                                       &body, &bodylen) != 0) {
 279                 return (NULL);
 280         }
 281
 282         if (code == IRPD_GETPROTO_OK) {
 283                 free_proto(pr);
 284                 if (irp_unmarshall_pr(pr, body) != 0) {
 285                         pr = NULL;
 286                 }
 287         } else {
 288                 pr = NULL;
 289         }
 290
 291         if (body != NULL) {
 292                 memput(body, bodylen);
 293         }
 294
 295         return (pr);
 296 }
 297
 298 /*%
 299  * void pr_minimize(struct irs_pr *this)
 300  *
 301  */
 302
 303 static void
 304 pr_minimize(struct irs_pr *this) {
 305         struct pvt *pvt = (struct pvt *)this->private;
 306
 307         irs_irp_disconnect(pvt->girpdata);
 308 }
 309
 310 /*%
 311  *      Deallocate all the memory irp_unmarshall_pr allocated.
 312  *
 313  */
 314
 315 static void
 316 free_proto(struct protoent *pr) {
 317         char **p;
 318
 319         if (pr == NULL)
 320                 return;
 321
 322         if (pr->p_name != NULL)
 323                 free(pr->p_name);
 324
 325         for (p = pr->p_aliases ; p != NULL && *p != NULL ; p++)
 326                 free(*p);
 327 }
 328
 329 /*! \file */