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

   1 /*
   2  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
   3  * Portions Copyright (c) 1996,1998 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 /* Imports */
  19
  20 #include "port_before.h"
  21
  22 #include <syslog.h>
  23 #include <sys/types.h>
  24 #include <sys/socket.h>
  25
  26 #include <netinet/in.h>
  27 #include <arpa/inet.h>
  28 #include <arpa/nameser.h>
  29
  30 #include <errno.h>
  31 #include <fcntl.h>
  32 #include <resolv.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <syslog.h>
  37
  38 #include <irs.h>
  39 #include <irp.h>
  40 #include <isc/irpmarshall.h>
  41
  42 #include <isc/memcluster.h>
  43 #include <isc/misc.h>
  44
  45 #include "irs_p.h"
  46 #include "lcl_p.h"
  47 #include "irp_p.h"
  48
  49 #include "port_after.h"
  50
  51 #define MAXALIASES 35
  52 #define MAXADDRSIZE 4
  53
  54 struct pvt {
  55         struct irp_p           *girpdata;
  56         int                     warned;
  57         struct nwent            net;
  58 };
  59
  60 /* Forward */
  61
  62 static void             nw_close(struct irs_nw *);
  63 static struct nwent *   nw_byname(struct irs_nw *, const char *, int);
  64 static struct nwent *   nw_byaddr(struct irs_nw *, void *, int, int);
  65 static struct nwent *   nw_next(struct irs_nw *);
  66 static void             nw_rewind(struct irs_nw *);
  67 static void             nw_minimize(struct irs_nw *);
  68
  69 static void             free_nw(struct nwent *nw);
  70
  71
  72 /* Public */
  73
  74 /*%
  75  * struct irs_nw * irs_irp_nw(struct irs_acc *this)
  76  *
  77  */
  78
  79 struct irs_nw *
  80 irs_irp_nw(struct irs_acc *this) {
  81         struct irs_nw *nw;
  82         struct pvt *pvt;
  83
  84         if (!(pvt = memget(sizeof *pvt))) {
  85                 errno = ENOMEM;
  86                 return (NULL);
  87         }
  88         memset(pvt, 0, sizeof *pvt);
  89
  90         if (!(nw = memget(sizeof *nw))) {
  91                 memput(pvt, sizeof *pvt);
  92                 errno = ENOMEM;
  93                 return (NULL);
  94         }
  95         memset(nw, 0x0, sizeof *nw);
  96         pvt->girpdata = this->private;
  97
  98         nw->private = pvt;
  99         nw->close = nw_close;
 100         nw->byname = nw_byname;
 101         nw->byaddr = nw_byaddr;
 102         nw->next = nw_next;
 103         nw->rewind = nw_rewind;
 104         nw->minimize = nw_minimize;
 105         return (nw);
 106 }
 107
 108 /* Methods */
 109
 110 /*%
 111  * void nw_close(struct irs_nw *this)
 112  *
 113  */
 114
 115 static void
 116 nw_close(struct irs_nw *this) {
 117         struct pvt *pvt = (struct pvt *)this->private;
 118
 119         nw_minimize(this);
 120
 121         free_nw(&pvt->net);
 122
 123         memput(pvt, sizeof *pvt);
 124         memput(this, sizeof *this);
 125 }
 126
 127 /*%
 128  * struct nwent * nw_byaddr(struct irs_nw *this, void *net,
 129  *                              int length, int type)
 130  *
 131  */
 132
 133 static struct nwent *
 134 nw_byaddr(struct irs_nw *this, void *net, int length, int type) {
 135         struct pvt *pvt = (struct pvt *)this->private;
 136         struct nwent *nw = &pvt->net;
 137         char *body = NULL;
 138         size_t bodylen;
 139         int code;
 140         char paddr[24];                 /*%< bigenough for ip4 w/ cidr spec. */
 141         char text[256];
 142
 143         if (inet_net_ntop(type, net, length, paddr, sizeof paddr) == NULL) {
 144                 return (NULL);
 145         }
 146
 147         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 148                 return (NULL);
 149         }
 150
 151         if (irs_irp_send_command(pvt->girpdata, "getnetbyaddr %s %s",
 152                                  paddr, ADDR_T_STR(type)) != 0)
 153                 return (NULL);
 154
 155         if (irs_irp_get_full_response(pvt->girpdata, &code,
 156                                       text, sizeof text,
 157                                       &body, &bodylen) != 0) {
 158                 return (NULL);
 159         }
 160
 161         if (code == IRPD_GETNET_OK) {
 162                 free_nw(nw);
 163                 if (irp_unmarshall_nw(nw, body) != 0) {
 164                         nw = NULL;
 165                 }
 166         } else {
 167                 nw = NULL;
 168         }
 169
 170         if (body != NULL) {
 171                 memput(body, bodylen);
 172         }
 173
 174         return (nw);
 175 }
 176
 177 /*%
 178  * struct nwent * nw_byname(struct irs_nw *this, const char *name, int type)
 179  *
 180  */
 181
 182 static struct nwent *
 183 nw_byname(struct irs_nw *this, const char *name, int type) {
 184         struct pvt *pvt = (struct pvt *)this->private;
 185         struct nwent *nw = &pvt->net;
 186         char *body = NULL;
 187         size_t bodylen;
 188         int code;
 189         char text[256];
 190
 191         if (nw->n_name != NULL &&
 192             strcmp(name, nw->n_name) == 0 &&
 193             nw->n_addrtype == type) {
 194                 return (nw);
 195         }
 196
 197         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 198                 return (NULL);
 199         }
 200
 201         if (irs_irp_send_command(pvt->girpdata, "getnetbyname %s", name) != 0)
 202                 return (NULL);
 203
 204         if (irs_irp_get_full_response(pvt->girpdata, &code,
 205                                       text, sizeof text,
 206                                       &body, &bodylen) != 0) {
 207                 return (NULL);
 208         }
 209
 210         if (code == IRPD_GETNET_OK) {
 211                 free_nw(nw);
 212                 if (irp_unmarshall_nw(nw, body) != 0) {
 213                         nw = NULL;
 214                 }
 215         } else {
 216                 nw = NULL;
 217         }
 218
 219         if (body != NULL) {
 220                 memput(body, bodylen);
 221         }
 222
 223         return (nw);
 224 }
 225
 226 /*%
 227  * void nw_rewind(struct irs_nw *this)
 228  *
 229  */
 230
 231 static void
 232 nw_rewind(struct irs_nw *this) {
 233         struct pvt *pvt = (struct pvt *)this->private;
 234         char text[256];
 235         int code;
 236
 237         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 238                 return;
 239         }
 240
 241         if (irs_irp_send_command(pvt->girpdata, "setnetent") != 0) {
 242                 return;
 243         }
 244
 245         code = irs_irp_read_response(pvt->girpdata, text, sizeof text);
 246         if (code != IRPD_GETNET_SETOK) {
 247                 if (irp_log_errors) {
 248                         syslog(LOG_WARNING, "setnetent failed: %s", text);
 249                 }
 250         }
 251
 252         return;
 253 }
 254
 255 /*%
 256  *      Prepares the cache if necessary and returns the first, or
 257  *      next item from it.
 258  */
 259
 260 static struct nwent *
 261 nw_next(struct irs_nw *this) {
 262         struct pvt *pvt = (struct pvt *)this->private;
 263         struct nwent *nw = &pvt->net;
 264         char *body;
 265         size_t bodylen;
 266         int code;
 267         char text[256];
 268
 269         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 270                 return (NULL);
 271         }
 272
 273         if (irs_irp_send_command(pvt->girpdata, "getnetent") != 0) {
 274                 return (NULL);
 275         }
 276
 277         if (irs_irp_get_full_response(pvt->girpdata, &code,
 278                                       text, sizeof text,
 279                                       &body, &bodylen) != 0) {
 280                 return (NULL);
 281         }
 282
 283         if (code == IRPD_GETNET_OK) {
 284                 free_nw(nw);
 285                 if (irp_unmarshall_nw(nw, body) != 0) {
 286                         nw = NULL;
 287                 }
 288         } else {
 289                 nw = NULL;
 290         }
 291
 292         if (body != NULL)
 293                 memput(body, bodylen);
 294         return (nw);
 295 }
 296
 297 /*%
 298  * void nw_minimize(struct irs_nw *this)
 299  *
 300  */
 301
 302 static void
 303 nw_minimize(struct irs_nw *this) {
 304         struct pvt *pvt = (struct pvt *)this->private;
 305
 306         irs_irp_disconnect(pvt->girpdata);
 307 }
 308
 309
 310
 311
 312 /* private. */
 313
 314 /*%
 315  *      deallocate all the memory irp_unmarshall_pw allocated.
 316  *
 317  */
 318
 319 static void
 320 free_nw(struct nwent *nw) {
 321         char **p;
 322
 323         if (nw == NULL)
 324                 return;
 325
 326         if (nw->n_name != NULL)
 327                 free(nw->n_name);
 328
 329         if (nw->n_aliases != NULL) {
 330                 for (p = nw->n_aliases ; *p != NULL ; p++) {
 331                         free(*p);
 332                 }
 333                 free(nw->n_aliases);
 334         }
 335
 336         if (nw->n_addr != NULL)
 337                 free(nw->n_addr);
 338 }
 339
 340 /*! \file */