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

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
   5  * Portions Copyright (c) 1996,1998 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_nw.c,v 1.4 2006/03/09 23:57:56 marka Exp";
  22 #endif /* LIBC_SCCS and not lint */
  23
  24 #if 0
  25
  26 #endif
  27
  28 /* Imports */
  29
  30 #include "port_before.h"
  31
  32 #include <syslog.h>
  33 #include <sys/types.h>
  34 #include <sys/socket.h>
  35
  36 #include <netinet/in.h>
  37 #include <arpa/inet.h>
  38 #include <arpa/nameser.h>
  39
  40 #include <errno.h>
  41 #include <fcntl.h>
  42 #include <resolv.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <syslog.h>
  47
  48 #include <irs.h>
  49 #include <irp.h>
  50 #include <isc/irpmarshall.h>
  51
  52 #include <isc/memcluster.h>
  53 #include <isc/misc.h>
  54
  55 #include "irs_p.h"
  56 #include "lcl_p.h"
  57 #include "irp_p.h"
  58
  59 #include "port_after.h"
  60
  61 #define MAXALIASES 35
  62 #define MAXADDRSIZE 4
  63
  64 struct pvt {
  65         struct irp_p           *girpdata;
  66         int                     warned;
  67         struct nwent            net;
  68 };
  69
  70 /* Forward */
  71
  72 static void             nw_close(struct irs_nw *);
  73 static struct nwent *   nw_byname(struct irs_nw *, const char *, int);
  74 static struct nwent *   nw_byaddr(struct irs_nw *, void *, int, int);
  75 static struct nwent *   nw_next(struct irs_nw *);
  76 static void             nw_rewind(struct irs_nw *);
  77 static void             nw_minimize(struct irs_nw *);
  78
  79 static void             free_nw(struct nwent *nw);
  80
  81
  82 /* Public */
  83
  84 /*%
  85  * struct irs_nw * irs_irp_nw(struct irs_acc *this)
  86  *
  87  */
  88
  89 struct irs_nw *
  90 irs_irp_nw(struct irs_acc *this) {
  91         struct irs_nw *nw;
  92         struct pvt *pvt;
  93
  94         if (!(pvt = memget(sizeof *pvt))) {
  95                 errno = ENOMEM;
  96                 return (NULL);
  97         }
  98         memset(pvt, 0, sizeof *pvt);
  99
 100         if (!(nw = memget(sizeof *nw))) {
 101                 memput(pvt, sizeof *pvt);
 102                 errno = ENOMEM;
 103                 return (NULL);
 104         }
 105         memset(nw, 0x0, sizeof *nw);
 106         pvt->girpdata = this->private;
 107
 108         nw->private = pvt;
 109         nw->close = nw_close;
 110         nw->byname = nw_byname;
 111         nw->byaddr = nw_byaddr;
 112         nw->next = nw_next;
 113         nw->rewind = nw_rewind;
 114         nw->minimize = nw_minimize;
 115         return (nw);
 116 }
 117
 118 /* Methods */
 119
 120 /*%
 121  * void nw_close(struct irs_nw *this)
 122  *
 123  */
 124
 125 static void
 126 nw_close(struct irs_nw *this) {
 127         struct pvt *pvt = (struct pvt *)this->private;
 128
 129         nw_minimize(this);
 130
 131         free_nw(&pvt->net);
 132
 133         memput(pvt, sizeof *pvt);
 134         memput(this, sizeof *this);
 135 }
 136
 137 /*%
 138  * struct nwent * nw_byaddr(struct irs_nw *this, void *net,
 139  *                              int length, int type)
 140  *
 141  */
 142
 143 static struct nwent *
 144 nw_byaddr(struct irs_nw *this, void *net, int length, int type) {
 145         struct pvt *pvt = (struct pvt *)this->private;
 146         struct nwent *nw = &pvt->net;
 147         char *body = NULL;
 148         size_t bodylen;
 149         int code;
 150         char paddr[24];                 /*%< bigenough for ip4 w/ cidr spec. */
 151         char text[256];
 152
 153         if (inet_net_ntop(type, net, length, paddr, sizeof paddr) == NULL) {
 154                 return (NULL);
 155         }
 156
 157         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 158                 return (NULL);
 159         }
 160
 161         if (irs_irp_send_command(pvt->girpdata, "getnetbyaddr %s %s",
 162                                  paddr, ADDR_T_STR(type)) != 0)
 163                 return (NULL);
 164
 165         if (irs_irp_get_full_response(pvt->girpdata, &code,
 166                                       text, sizeof text,
 167                                       &body, &bodylen) != 0) {
 168                 return (NULL);
 169         }
 170
 171         if (code == IRPD_GETNET_OK) {
 172                 free_nw(nw);
 173                 if (irp_unmarshall_nw(nw, body) != 0) {
 174                         nw = NULL;
 175                 }
 176         } else {
 177                 nw = NULL;
 178         }
 179
 180         if (body != NULL) {
 181                 memput(body, bodylen);
 182         }
 183
 184         return (nw);
 185 }
 186
 187 /*%
 188  * struct nwent * nw_byname(struct irs_nw *this, const char *name, int type)
 189  *
 190  */
 191
 192 static struct nwent *
 193 nw_byname(struct irs_nw *this, const char *name, int type) {
 194         struct pvt *pvt = (struct pvt *)this->private;
 195         struct nwent *nw = &pvt->net;
 196         char *body = NULL;
 197         size_t bodylen;
 198         int code;
 199         char text[256];
 200
 201         if (nw->n_name != NULL &&
 202             strcmp(name, nw->n_name) == 0 &&
 203             nw->n_addrtype == type) {
 204                 return (nw);
 205         }
 206
 207         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 208                 return (NULL);
 209         }
 210
 211         if (irs_irp_send_command(pvt->girpdata, "getnetbyname %s", name) != 0)
 212                 return (NULL);
 213
 214         if (irs_irp_get_full_response(pvt->girpdata, &code,
 215                                       text, sizeof text,
 216                                       &body, &bodylen) != 0) {
 217                 return (NULL);
 218         }
 219
 220         if (code == IRPD_GETNET_OK) {
 221                 free_nw(nw);
 222                 if (irp_unmarshall_nw(nw, body) != 0) {
 223                         nw = NULL;
 224                 }
 225         } else {
 226                 nw = NULL;
 227         }
 228
 229         if (body != NULL) {
 230                 memput(body, bodylen);
 231         }
 232
 233         return (nw);
 234 }
 235
 236 /*%
 237  * void nw_rewind(struct irs_nw *this)
 238  *
 239  */
 240
 241 static void
 242 nw_rewind(struct irs_nw *this) {
 243         struct pvt *pvt = (struct pvt *)this->private;
 244         char text[256];
 245         int code;
 246
 247         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 248                 return;
 249         }
 250
 251         if (irs_irp_send_command(pvt->girpdata, "setnetent") != 0) {
 252                 return;
 253         }
 254
 255         code = irs_irp_read_response(pvt->girpdata, text, sizeof text);
 256         if (code != IRPD_GETNET_SETOK) {
 257                 if (irp_log_errors) {
 258                         syslog(LOG_WARNING, "setnetent failed: %s", text);
 259                 }
 260         }
 261
 262         return;
 263 }
 264
 265 /*%
 266  *      Prepares the cache if necessary and returns the first, or
 267  *      next item from it.
 268  */
 269
 270 static struct nwent *
 271 nw_next(struct irs_nw *this) {
 272         struct pvt *pvt = (struct pvt *)this->private;
 273         struct nwent *nw = &pvt->net;
 274         char *body;
 275         size_t bodylen;
 276         int code;
 277         char text[256];
 278
 279         if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
 280                 return (NULL);
 281         }
 282
 283         if (irs_irp_send_command(pvt->girpdata, "getnetent") != 0) {
 284                 return (NULL);
 285         }
 286
 287         if (irs_irp_get_full_response(pvt->girpdata, &code,
 288                                       text, sizeof text,
 289                                       &body, &bodylen) != 0) {
 290                 return (NULL);
 291         }
 292
 293         if (code == IRPD_GETNET_OK) {
 294                 free_nw(nw);
 295                 if (irp_unmarshall_nw(nw, body) != 0) {
 296                         nw = NULL;
 297                 }
 298         } else {
 299                 nw = NULL;
 300         }
 301
 302         if (body != NULL)
 303                 memput(body, bodylen);
 304         return (nw);
 305 }
 306
 307 /*%
 308  * void nw_minimize(struct irs_nw *this)
 309  *
 310  */
 311
 312 static void
 313 nw_minimize(struct irs_nw *this) {
 314         struct pvt *pvt = (struct pvt *)this->private;
 315
 316         irs_irp_disconnect(pvt->girpdata);
 317 }
 318
 319
 320
 321
 322 /* private. */
 323
 324 /*%
 325  *      deallocate all the memory irp_unmarshall_pw allocated.
 326  *
 327  */
 328
 329 static void
 330 free_nw(struct nwent *nw) {
 331         char **p;
 332
 333         if (nw == NULL)
 334                 return;
 335
 336         if (nw->n_name != NULL)
 337                 free(nw->n_name);
 338
 339         if (nw->n_aliases != NULL) {
 340                 for (p = nw->n_aliases ; *p != NULL ; p++) {
 341                         free(*p);
 342                 }
 343                 free(nw->n_aliases);
 344         }
 345
 346         if (nw->n_addr != NULL)
 347                 free(nw->n_addr);
 348 }
 349
 350 /*! \file */