usr/src/lib/libresolv2/common/irs/irp_pr.c

   1 /*
   2  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
   3  * Portions Copyright (c) 1996 by Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  15  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include "port_before.h"
  19
  20 #include <syslog.h>
  21 #include <sys/types.h>
  22
  23 #include <errno.h>
  24 #include <fcntl.h>
  25 #include <string.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <netdb.h>
  29 #include <syslog.h>
  30
  31 #include <irs.h>
  32 #include <irp.h>
  33 #include <isc/memcluster.h>
  34 #include <isc/irpmarshall.h>
  35
  36 #include "irs_p.h"
  37 #include "lcl_p.h"
  38 #include "irp_p.h"
  39
  40 #include "port_after.h"
  41
  42
  43 #define MAXALIASES      35
  44
  45 /* Types */
  46
  47 struct pvt {
  48         struct irp_p           *girpdata;
  49         int                     warned;
  50         struct protoent         proto;
  51 };
  52
  53 /* Forward */
  54
  55 static void                     pr_close(struct irs_pr *);
  56 static struct protoent *        pr_next(struct irs_pr *);
  57 static struct protoent *        pr_byname(struct irs_pr *, const char *);
  58 static struct protoent *        pr_bynumber(struct irs_pr *, int);
  59 static void                     pr_rewind(struct irs_pr *);
  60 static void                     pr_minimize(struct irs_pr *);
  61
  62 static void                     free_proto(struct protoent *pr);
  63
  64 /* Public */
  65
  66 /*%
  67  * struct irs_pr * irs_irp_pr(struct irs_acc *this)
  68  *
  69  */
  70
  71 struct irs_pr *
  72 irs_irp_pr(struct irs_acc *this) {
  73         struct irs_pr *pr;
  74         struct pvt *pvt;
  75
  76         if (!(pr = memget(sizeof *pr))) {
  77                 errno = ENOMEM;
  78                 return (NULL);
  79         }
  80         memset(pr, 0x0, sizeof *pr);
  81
  82         if (!(pvt = memget(sizeof *pvt))) {
  83                 memput(pr, sizeof *pr);
  84                 errno = ENOMEM;
  85                 return (NULL);
  86         }
  87         memset(pvt, 0, sizeof *pvt);
  88         pvt->girpdata = this->private;
  89
  90         pr->private = pvt;
  91         pr->close = pr_close;
  92         pr->byname = pr_byname;
  93         pr->bynumber = pr_bynumber;
  94         pr->next = pr_next;
  95         pr->rewind = pr_rewind;
  96         pr->minimize = pr_minimize;
  97         return (pr);
  98 }
  99
 100 /* Methods */
 101
 102 /*%
 103  * void pr_close(struct irs_pr *this)
 104  *
 105  */
 106
 107 static void
 108 pr_close(struct irs_pr *this) {
 109         struct pvt *pvt = (struct pvt *)this->private;
 110
 111         pr_minimize(this);
 112
 113         free_proto(&pvt->proto);
 114
 115         memput(pvt, sizeof *pvt);
 116         memput(this, sizeof *this);
 117 }
 118
 119 /*%
 120  * struct protoent * pr_byname(struct irs_pr *this, const char *name)
 121  *
 122  */
 123
 124 static struct protoent *
 125 pr_byname(struct irs_pr *this, const char *name) {
 126         struct pvt *pvt = (struct pvt *)this->private;
 127         struct protoent *pr = &pvt->proto;
 128         char *body = NULL;
 129         size_t bodylen;
 130         int code;
 131         int i;
 132         char text[256];
 133
 134         if (pr->p_name != NULL && strcmp(name, pr->p_name) == 0) {
 135                 return (pr);
 136         }
 137
 138         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 139                 return (NULL);
 140         }
 141
 142         i = irs_irp_send_command(pvt->girpdata, "getprotobyname %s", name);
 143         if (i != 0)
 144                 return (NULL);
 145
 146         if (irs_irp_get_full_response(pvt->girpdata, &code,
 147                                       text, sizeof text,
 148                                       &body, &bodylen) != 0) {
 149                 return (NULL);
 150         }
 151
 152         if (code == IRPD_GETPROTO_OK) {
 153                 free_proto(pr);
 154                 if (irp_unmarshall_pr(pr, body) != 0) {
 155                         pr = NULL;
 156                 }
 157         } else {
 158                 pr = NULL;
 159         }
 160
 161         if (body != NULL) {
 162                 memput(body, bodylen);
 163         }
 164
 165         return (pr);
 166 }
 167
 168 /*%
 169  * struct protoent * pr_bynumber(struct irs_pr *this, int proto)
 170  *
 171  */
 172
 173 static struct protoent *
 174 pr_bynumber(struct irs_pr *this, int proto) {
 175         struct pvt *pvt = (struct pvt *)this->private;
 176         struct protoent *pr = &pvt->proto;
 177         char *body = NULL;
 178         size_t bodylen;
 179         int code;
 180         int i;
 181         char text[256];
 182
 183         if (pr->p_name != NULL && proto == pr->p_proto) {
 184                 return (pr);
 185         }
 186
 187         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 188                 return (NULL);
 189         }
 190
 191         i = irs_irp_send_command(pvt->girpdata, "getprotobynumber %d", proto);
 192         if (i != 0)
 193                 return (NULL);
 194
 195         if (irs_irp_get_full_response(pvt->girpdata, &code,
 196                                       text, sizeof text,
 197                                       &body, &bodylen) != 0) {
 198                 return (NULL);
 199         }
 200
 201         if (code == IRPD_GETPROTO_OK) {
 202                 free_proto(pr);
 203                 if (irp_unmarshall_pr(pr, body) != 0) {
 204                         pr = NULL;
 205                 }
 206         } else {
 207                 pr = NULL;
 208         }
 209
 210         if (body != NULL) {
 211                 memput(body, bodylen);
 212         }
 213
 214         return (pr);
 215 }
 216
 217 /*%
 218  * void pr_rewind(struct irs_pr *this)
 219  *
 220  */
 221
 222 static void
 223 pr_rewind(struct irs_pr *this) {
 224         struct pvt *pvt = (struct pvt *)this->private;
 225         char text[256];
 226         int code;
 227
 228         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 229                 return;
 230         }
 231
 232         if (irs_irp_send_command(pvt->girpdata, "setprotoent") != 0) {
 233                 return;
 234         }
 235
 236         code = irs_irp_read_response(pvt->girpdata, text, sizeof text);
 237         if (code != IRPD_GETPROTO_SETOK) {
 238                 if (irp_log_errors) {
 239                         syslog(LOG_WARNING, "setprotoent failed: %s", text);
 240                 }
 241         }
 242
 243         return;
 244 }
 245
 246 /*%
 247  *      Prepares the cache if necessary and returns the next item in it.
 248  *
 249  */
 250
 251 static struct protoent *
 252 pr_next(struct irs_pr *this) {
 253         struct pvt *pvt = (struct pvt *)this->private;
 254         struct protoent *pr = &pvt->proto;
 255         char *body;
 256         size_t bodylen;
 257         int code;
 258         char text[256];
 259
 260         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 261                 return (NULL);
 262         }
 263
 264         if (irs_irp_send_command(pvt->girpdata, "getprotoent") != 0) {
 265                 return (NULL);
 266         }
 267
 268         if (irs_irp_get_full_response(pvt->girpdata, &code,
 269                                       text, sizeof text,
 270                                       &body, &bodylen) != 0) {
 271                 return (NULL);
 272         }
 273
 274         if (code == IRPD_GETPROTO_OK) {
 275                 free_proto(pr);
 276                 if (irp_unmarshall_pr(pr, body) != 0) {
 277                         pr = NULL;
 278                 }
 279         } else {
 280                 pr = NULL;
 281         }
 282
 283         if (body != NULL) {
 284                 memput(body, bodylen);
 285         }
 286
 287         return (pr);
 288 }
 289
 290 /*%
 291  * void pr_minimize(struct irs_pr *this)
 292  *
 293  */
 294
 295 static void
 296 pr_minimize(struct irs_pr *this) {
 297         struct pvt *pvt = (struct pvt *)this->private;
 298
 299         irs_irp_disconnect(pvt->girpdata);
 300 }
 301
 302 /*%
 303  *      Deallocate all the memory irp_unmarshall_pr allocated.
 304  *
 305  */
 306
 307 static void
 308 free_proto(struct protoent *pr) {
 309         char **p;
 310
 311         if (pr == NULL)
 312                 return;
 313
 314         free(pr->p_name);
 315
 316         for (p = pr->p_aliases ; p != NULL && *p != NULL ; p++)
 317                 free(*p);
 318 }
 319
 320 /*! \file */