contrib/bind-9.2.4rc7/lib/dns/rdata/generic/txt_16.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: txt_16.c,v 1.37.2.1 2004/03/09 06:11:34 marka Exp $ */
  19
  20 /* Reviewed: Thu Mar 16 15:40:00 PST 2000 by bwelling */
  21
  22 #ifndef RDATA_GENERIC_TXT_16_C
  23 #define RDATA_GENERIC_TXT_16_C
  24
  25 #define RRTYPE_TXT_ATTRIBUTES (0)
  26
  27 static inline isc_result_t
  28 fromtext_txt(ARGS_FROMTEXT) {
  29         isc_token_t token;
  30         int strings;
  31
  32         REQUIRE(type == 16);
  33
  34         UNUSED(type);
  35         UNUSED(rdclass);
  36         UNUSED(origin);
  37         UNUSED(downcase);
  38         UNUSED(callbacks);
  39
  40         strings = 0;
  41         for (;;) {
  42                 RETERR(isc_lex_getmastertoken(lexer, &token,
  43                                               isc_tokentype_qstring,
  44                                               ISC_TRUE));
  45                 if (token.type != isc_tokentype_qstring &&
  46                     token.type != isc_tokentype_string)
  47                         break;
  48                 RETTOK(txt_fromtext(&token.value.as_textregion, target));
  49                 strings++;
  50         }
  51         /* Let upper layer handle eol/eof. */
  52         isc_lex_ungettoken(lexer, &token);
  53         return (strings == 0 ? ISC_R_UNEXPECTEDEND : ISC_R_SUCCESS);
  54 }
  55
  56 static inline isc_result_t
  57 totext_txt(ARGS_TOTEXT) {
  58         isc_region_t region;
  59
  60         UNUSED(tctx);
  61
  62         REQUIRE(rdata->type == 16);
  63
  64         dns_rdata_toregion(rdata, &region);
  65
  66         while (region.length > 0) {
  67                 RETERR(txt_totext(&region, target));
  68                 if (region.length > 0)
  69                         RETERR(str_totext(" ", target));
  70         }
  71
  72         return (ISC_R_SUCCESS);
  73 }
  74
  75 static inline isc_result_t
  76 fromwire_txt(ARGS_FROMWIRE) {
  77         isc_result_t result;
  78
  79         REQUIRE(type == 16);
  80
  81         UNUSED(type);
  82         UNUSED(dctx);
  83         UNUSED(rdclass);
  84         UNUSED(downcase);
  85
  86         do {
  87                 result = txt_fromwire(source, target);
  88                 if (result != ISC_R_SUCCESS)
  89                         return (result);
  90         } while (!buffer_empty(source));
  91         return (ISC_R_SUCCESS);
  92 }
  93
  94 static inline isc_result_t
  95 towire_txt(ARGS_TOWIRE) {
  96         isc_region_t region;
  97
  98         REQUIRE(rdata->type == 16);
  99
 100         UNUSED(cctx);
 101
 102         isc_buffer_availableregion(target, &region);
 103         if (region.length < rdata->length)
 104                 return (ISC_R_NOSPACE);
 105
 106         memcpy(region.base, rdata->data, rdata->length);
 107         isc_buffer_add(target, rdata->length);
 108         return (ISC_R_SUCCESS);
 109 }
 110
 111 static inline int
 112 compare_txt(ARGS_COMPARE) {
 113         isc_region_t r1;
 114         isc_region_t r2;
 115
 116         REQUIRE(rdata1->type == rdata2->type);
 117         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 118         REQUIRE(rdata1->type == 16);
 119
 120         dns_rdata_toregion(rdata1, &r1);
 121         dns_rdata_toregion(rdata2, &r2);
 122         return (compare_region(&r1, &r2));
 123 }
 124
 125 static inline isc_result_t
 126 fromstruct_txt(ARGS_FROMSTRUCT) {
 127         dns_rdata_txt_t *txt = source;
 128         isc_region_t region;
 129         isc_uint8_t length;
 130
 131         REQUIRE(type == 16);
 132         REQUIRE(source != NULL);
 133         REQUIRE(txt->common.rdtype == type);
 134         REQUIRE(txt->common.rdclass == rdclass);
 135         REQUIRE(txt->txt != NULL && txt->txt_len != 0);
 136
 137         UNUSED(type);
 138         UNUSED(rdclass);
 139
 140         region.base = txt->txt;
 141         region.length = txt->txt_len;
 142         while (region.length > 0) {
 143                 length = uint8_fromregion(&region);
 144                 isc_region_consume(&region, 1);
 145                 if (region.length <= length)
 146                         return (ISC_R_UNEXPECTEDEND);
 147                 isc_region_consume(&region, length);
 148         }
 149
 150         return (mem_tobuffer(target, txt->txt, txt->txt_len));
 151 }
 152
 153 static inline isc_result_t
 154 tostruct_txt(ARGS_TOSTRUCT) {
 155         dns_rdata_txt_t *txt = target;
 156         isc_region_t r;
 157
 158         REQUIRE(rdata->type == 16);
 159         REQUIRE(target != NULL);
 160
 161         txt->common.rdclass = rdata->rdclass;
 162         txt->common.rdtype = rdata->type;
 163         ISC_LINK_INIT(&txt->common, link);
 164
 165         dns_rdata_toregion(rdata, &r);
 166         txt->txt_len = r.length;
 167         txt->txt = mem_maybedup(mctx, r.base, r.length);
 168         if (txt->txt == NULL)
 169                 return (ISC_R_NOMEMORY);
 170
 171         txt->offset = 0;
 172         txt->mctx = mctx;
 173         return (ISC_R_SUCCESS);
 174 }
 175
 176 static inline void
 177 freestruct_txt(ARGS_FREESTRUCT) {
 178         dns_rdata_txt_t *txt = source;
 179
 180         REQUIRE(source != NULL);
 181         REQUIRE(txt->common.rdtype == 16);
 182
 183         if (txt->mctx == NULL)
 184                 return;
 185
 186         if (txt->txt != NULL)
 187                 isc_mem_free(txt->mctx, txt->txt);
 188         txt->mctx = NULL;
 189 }
 190
 191 static inline isc_result_t
 192 additionaldata_txt(ARGS_ADDLDATA) {
 193         REQUIRE(rdata->type == 16);
 194
 195         UNUSED(rdata);
 196         UNUSED(add);
 197         UNUSED(arg);
 198
 199         return (ISC_R_SUCCESS);
 200 }
 201
 202 static inline isc_result_t
 203 digest_txt(ARGS_DIGEST) {
 204         isc_region_t r;
 205
 206         REQUIRE(rdata->type == 16);
 207
 208         dns_rdata_toregion(rdata, &r);
 209
 210         return ((digest)(arg, &r));
 211 }
 212
 213 #endif  /* RDATA_GENERIC_TXT_16_C */