contrib/bind-9.2.4rc7/lib/dns/rdata/in_1/a_1.c

   1 /*
   2  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1998-2001  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 WITH
  10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15  * PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* $Id: a_1.c,v 1.46.2.1 2004/03/09 06:11:36 marka Exp $ */
  19
  20 /* Reviewed: Thu Mar 16 16:52:50 PST 2000 by bwelling */
  21
  22 #ifndef RDATA_IN_1_A_1_C
  23 #define RDATA_IN_1_A_1_C
  24
  25 #include <string.h>
  26
  27 #include <isc/net.h>
  28
  29 #define RRTYPE_A_ATTRIBUTES (0)
  30
  31 static inline isc_result_t
  32 fromtext_in_a(ARGS_FROMTEXT) {
  33         isc_token_t token;
  34         struct in_addr addr;
  35         isc_region_t region;
  36
  37         REQUIRE(type == 1);
  38         REQUIRE(rdclass == 1);
  39
  40         UNUSED(type);
  41         UNUSED(origin);
  42         UNUSED(downcase);
  43         UNUSED(rdclass);
  44
  45         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  46                                       ISC_FALSE));
  47
  48         if (getquad(token.value.as_pointer, &addr, lexer, callbacks) != 1)
  49                 RETTOK(DNS_R_BADDOTTEDQUAD);
  50         isc_buffer_availableregion(target, &region);
  51         if (region.length < 4)
  52                 return (ISC_R_NOSPACE);
  53         memcpy(region.base, &addr, 4);
  54         isc_buffer_add(target, 4);
  55         return (ISC_R_SUCCESS);
  56 }
  57
  58 static inline isc_result_t
  59 totext_in_a(ARGS_TOTEXT) {
  60         isc_region_t region;
  61
  62         REQUIRE(rdata->type == 1);
  63         REQUIRE(rdata->rdclass == 1);
  64         REQUIRE(rdata->length == 4);
  65
  66         UNUSED(tctx);
  67
  68         dns_rdata_toregion(rdata, &region);
  69         return (inet_totext(AF_INET, &region, target));
  70 }
  71
  72 static inline isc_result_t
  73 fromwire_in_a(ARGS_FROMWIRE) {
  74         isc_region_t sregion;
  75         isc_region_t tregion;
  76
  77         REQUIRE(type == 1);
  78         REQUIRE(rdclass == 1);
  79
  80         UNUSED(type);
  81         UNUSED(dctx);
  82         UNUSED(downcase);
  83         UNUSED(rdclass);
  84
  85         isc_buffer_activeregion(source, &sregion);
  86         isc_buffer_availableregion(target, &tregion);
  87         if (sregion.length < 4)
  88                 return (ISC_R_UNEXPECTEDEND);
  89         if (tregion.length < 4)
  90                 return (ISC_R_NOSPACE);
  91
  92         memcpy(tregion.base, sregion.base, 4);
  93         isc_buffer_forward(source, 4);
  94         isc_buffer_add(target, 4);
  95         return (ISC_R_SUCCESS);
  96 }
  97
  98 static inline isc_result_t
  99 towire_in_a(ARGS_TOWIRE) {
 100         isc_region_t region;
 101
 102         REQUIRE(rdata->type == 1);
 103         REQUIRE(rdata->rdclass == 1);
 104         REQUIRE(rdata->length == 4);
 105
 106         UNUSED(cctx);
 107
 108         isc_buffer_availableregion(target, &region);
 109         if (region.length < rdata->length)
 110                 return (ISC_R_NOSPACE);
 111         memcpy(region.base, rdata->data, rdata->length);
 112         isc_buffer_add(target, 4);
 113         return (ISC_R_SUCCESS);
 114 }
 115
 116 static inline int
 117 compare_in_a(ARGS_COMPARE) {
 118         isc_region_t r1;
 119         isc_region_t r2;
 120
 121         REQUIRE(rdata1->type == rdata2->type);
 122         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 123         REQUIRE(rdata1->type == 1);
 124         REQUIRE(rdata1->rdclass == 1);
 125         REQUIRE(rdata1->length == 4);
 126         REQUIRE(rdata2->length == 4);
 127
 128         dns_rdata_toregion(rdata1, &r1);
 129         dns_rdata_toregion(rdata2, &r2);
 130         return (compare_region(&r1, &r2));
 131 }
 132
 133 static inline isc_result_t
 134 fromstruct_in_a(ARGS_FROMSTRUCT) {
 135         dns_rdata_in_a_t *a = source;
 136         isc_uint32_t n;
 137
 138         REQUIRE(type == 1);
 139         REQUIRE(rdclass == 1);
 140         REQUIRE(source != NULL);
 141         REQUIRE(a->common.rdtype == type);
 142         REQUIRE(a->common.rdclass == rdclass);
 143
 144         UNUSED(type);
 145         UNUSED(rdclass);
 146
 147         n = ntohl(a->in_addr.s_addr);
 148
 149         return (uint32_tobuffer(n, target));
 150 }
 151
 152
 153 static inline isc_result_t
 154 tostruct_in_a(ARGS_TOSTRUCT) {
 155         dns_rdata_in_a_t *a = target;
 156         isc_uint32_t n;
 157         isc_region_t region;
 158
 159         REQUIRE(rdata->type == 1);
 160         REQUIRE(rdata->rdclass == 1);
 161         REQUIRE(rdata->length == 4);
 162
 163         UNUSED(mctx);
 164
 165         a->common.rdclass = rdata->rdclass;
 166         a->common.rdtype = rdata->type;
 167         ISC_LINK_INIT(&a->common, link);
 168
 169         dns_rdata_toregion(rdata, &region);
 170         n = uint32_fromregion(&region);
 171         a->in_addr.s_addr = htonl(n);
 172
 173         return (ISC_R_SUCCESS);
 174 }
 175
 176 static inline void
 177 freestruct_in_a(ARGS_FREESTRUCT) {
 178         dns_rdata_in_a_t *a = source;
 179
 180         REQUIRE(source != NULL);
 181         REQUIRE(a->common.rdtype == 1);
 182         REQUIRE(a->common.rdclass == 1);
 183
 184         UNUSED(a);
 185 }
 186
 187 static inline isc_result_t
 188 additionaldata_in_a(ARGS_ADDLDATA) {
 189         REQUIRE(rdata->type == 1);
 190         REQUIRE(rdata->rdclass == 1);
 191
 192         UNUSED(rdata);
 193         UNUSED(add);
 194         UNUSED(arg);
 195
 196         return (ISC_R_SUCCESS);
 197 }
 198
 199 static inline isc_result_t
 200 digest_in_a(ARGS_DIGEST) {
 201         isc_region_t r;
 202
 203         REQUIRE(rdata->type == 1);
 204         REQUIRE(rdata->rdclass == 1);
 205
 206         dns_rdata_toregion(rdata, &r);
 207
 208         return ((digest)(arg, &r));
 209 }
 210
 211 #endif  /* RDATA_IN_1_A_1_C */