Harald Welte | 92c45f3 | 2010-06-12 18:59:38 +0200 | [diff] [blame] | 1 | /*- |
| 2 | * Copyright (c) 2003, 2005 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| 3 | * Redistribution and modifications are permitted subject to BSD license. |
| 4 | */ |
| 5 | #include <asn_internal.h> |
| 6 | #include <asn_codecs_prim.h> |
| 7 | #include <NULL.h> |
| 8 | #include <BOOLEAN.h> /* Implemented in terms of BOOLEAN type */ |
| 9 | |
| 10 | /* |
| 11 | * NULL basic type description. |
| 12 | */ |
Harald Welte | 41b85d5 | 2015-08-31 08:56:53 +0200 | [diff] [blame^] | 13 | static const ber_tlv_tag_t asn_DEF_NULL_tags[] = { |
Harald Welte | 92c45f3 | 2010-06-12 18:59:38 +0200 | [diff] [blame] | 14 | (ASN_TAG_CLASS_UNIVERSAL | (5 << 2)) |
| 15 | }; |
| 16 | asn_TYPE_descriptor_t asn_DEF_NULL = { |
| 17 | "NULL", |
| 18 | "NULL", |
| 19 | BOOLEAN_free, |
| 20 | NULL_print, |
| 21 | asn_generic_no_constraint, |
| 22 | BOOLEAN_decode_ber, /* Implemented in terms of BOOLEAN */ |
| 23 | NULL_encode_der, /* Special handling of DER encoding */ |
| 24 | NULL_decode_xer, |
| 25 | NULL_encode_xer, |
| 26 | NULL_decode_uper, /* Unaligned PER decoder */ |
| 27 | NULL_encode_uper, /* Unaligned PER encoder */ |
Harald Welte | 41b85d5 | 2015-08-31 08:56:53 +0200 | [diff] [blame^] | 28 | NULL_decode_aper, /* Aligned PER decoder */ |
| 29 | NULL_encode_aper, /* Aligned PER encoder */ |
Harald Welte | 92c45f3 | 2010-06-12 18:59:38 +0200 | [diff] [blame] | 30 | 0, /* Use generic outmost tag fetcher */ |
| 31 | asn_DEF_NULL_tags, |
| 32 | sizeof(asn_DEF_NULL_tags) / sizeof(asn_DEF_NULL_tags[0]), |
| 33 | asn_DEF_NULL_tags, /* Same as above */ |
| 34 | sizeof(asn_DEF_NULL_tags) / sizeof(asn_DEF_NULL_tags[0]), |
| 35 | 0, /* No PER visible constraints */ |
| 36 | 0, 0, /* No members */ |
| 37 | 0 /* No specifics */ |
| 38 | }; |
| 39 | |
| 40 | asn_enc_rval_t |
| 41 | NULL_encode_der(asn_TYPE_descriptor_t *td, void *ptr, |
| 42 | int tag_mode, ber_tlv_tag_t tag, |
| 43 | asn_app_consume_bytes_f *cb, void *app_key) { |
| 44 | asn_enc_rval_t erval; |
| 45 | |
| 46 | erval.encoded = der_write_tags(td, 0, tag_mode, 0, tag, cb, app_key); |
| 47 | if(erval.encoded == -1) { |
| 48 | erval.failed_type = td; |
| 49 | erval.structure_ptr = ptr; |
| 50 | } |
| 51 | |
| 52 | _ASN_ENCODED_OK(erval); |
| 53 | } |
| 54 | |
| 55 | asn_enc_rval_t |
| 56 | NULL_encode_xer(asn_TYPE_descriptor_t *td, void *sptr, |
| 57 | int ilevel, enum xer_encoder_flags_e flags, |
| 58 | asn_app_consume_bytes_f *cb, void *app_key) { |
| 59 | asn_enc_rval_t er; |
| 60 | |
| 61 | (void)td; |
| 62 | (void)sptr; |
| 63 | (void)ilevel; |
| 64 | (void)flags; |
| 65 | (void)cb; |
| 66 | (void)app_key; |
| 67 | |
| 68 | /* XMLNullValue is empty */ |
| 69 | er.encoded = 0; |
| 70 | _ASN_ENCODED_OK(er); |
| 71 | } |
| 72 | |
| 73 | |
| 74 | static enum xer_pbd_rval |
| 75 | NULL__xer_body_decode(asn_TYPE_descriptor_t *td, void *sptr, const void *chunk_buf, size_t chunk_size) { |
| 76 | (void)td; |
| 77 | (void)sptr; |
Harald Welte | 41b85d5 | 2015-08-31 08:56:53 +0200 | [diff] [blame^] | 78 | (void)chunk_buf; /* Going to be empty according to the rules below. */ |
Harald Welte | 92c45f3 | 2010-06-12 18:59:38 +0200 | [diff] [blame] | 79 | |
Harald Welte | 41b85d5 | 2015-08-31 08:56:53 +0200 | [diff] [blame^] | 80 | /* |
| 81 | * There must be no content in self-terminating <NULL/> tag. |
| 82 | */ |
| 83 | if(chunk_size) |
Harald Welte | 92c45f3 | 2010-06-12 18:59:38 +0200 | [diff] [blame] | 84 | return XPBD_BROKEN_ENCODING; |
Harald Welte | 41b85d5 | 2015-08-31 08:56:53 +0200 | [diff] [blame^] | 85 | else |
| 86 | return XPBD_BODY_CONSUMED; |
Harald Welte | 92c45f3 | 2010-06-12 18:59:38 +0200 | [diff] [blame] | 87 | } |
| 88 | |
| 89 | asn_dec_rval_t |
| 90 | NULL_decode_xer(asn_codec_ctx_t *opt_codec_ctx, |
| 91 | asn_TYPE_descriptor_t *td, void **sptr, const char *opt_mname, |
| 92 | const void *buf_ptr, size_t size) { |
| 93 | |
| 94 | return xer_decode_primitive(opt_codec_ctx, td, |
| 95 | sptr, sizeof(NULL_t), opt_mname, buf_ptr, size, |
| 96 | NULL__xer_body_decode); |
| 97 | } |
| 98 | |
| 99 | int |
| 100 | NULL_print(asn_TYPE_descriptor_t *td, const void *sptr, int ilevel, |
| 101 | asn_app_consume_bytes_f *cb, void *app_key) { |
| 102 | |
| 103 | (void)td; /* Unused argument */ |
| 104 | (void)ilevel; /* Unused argument */ |
| 105 | |
| 106 | if(sptr) { |
| 107 | return (cb("<present>", 9, app_key) < 0) ? -1 : 0; |
| 108 | } else { |
| 109 | return (cb("<absent>", 8, app_key) < 0) ? -1 : 0; |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | asn_dec_rval_t |
| 114 | NULL_decode_uper(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td, |
| 115 | asn_per_constraints_t *constraints, void **sptr, asn_per_data_t *pd) { |
| 116 | asn_dec_rval_t rv; |
| 117 | |
| 118 | (void)opt_codec_ctx; |
| 119 | (void)td; |
| 120 | (void)constraints; |
| 121 | (void)pd; |
| 122 | |
| 123 | if(!*sptr) { |
| 124 | *sptr = MALLOC(sizeof(NULL_t)); |
| 125 | if(*sptr) { |
| 126 | *(NULL_t *)*sptr = 0; |
| 127 | } else { |
| 128 | _ASN_DECODE_FAILED; |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | /* |
| 133 | * NULL type does not have content octets. |
| 134 | */ |
| 135 | |
| 136 | rv.code = RC_OK; |
| 137 | rv.consumed = 0; |
| 138 | return rv; |
| 139 | } |
| 140 | |
Harald Welte | 41b85d5 | 2015-08-31 08:56:53 +0200 | [diff] [blame^] | 141 | asn_dec_rval_t |
| 142 | NULL_decode_aper(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td, |
| 143 | asn_per_constraints_t *constraints, void **sptr, asn_per_data_t *pd) { |
| 144 | asn_dec_rval_t rv; |
| 145 | |
| 146 | (void)opt_codec_ctx; |
| 147 | (void)td; |
| 148 | (void)constraints; |
| 149 | (void)pd; |
| 150 | |
| 151 | if(!*sptr) { |
| 152 | *sptr = MALLOC(sizeof(NULL_t)); |
| 153 | if(*sptr) { |
| 154 | *(NULL_t *)*sptr = 0; |
| 155 | } else { |
| 156 | _ASN_DECODE_FAILED; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | /* |
| 161 | * NULL type does not have content octets. |
| 162 | */ |
| 163 | |
| 164 | rv.code = RC_OK; |
| 165 | rv.consumed = 0; |
| 166 | return rv; |
| 167 | } |
| 168 | |
Harald Welte | 92c45f3 | 2010-06-12 18:59:38 +0200 | [diff] [blame] | 169 | asn_enc_rval_t |
| 170 | NULL_encode_uper(asn_TYPE_descriptor_t *td, asn_per_constraints_t *constraints, |
| 171 | void *sptr, asn_per_outp_t *po) { |
| 172 | asn_enc_rval_t er; |
| 173 | |
| 174 | (void)td; |
| 175 | (void)constraints; |
| 176 | (void)sptr; |
| 177 | (void)po; |
| 178 | |
| 179 | er.encoded = 0; |
| 180 | _ASN_ENCODED_OK(er); |
| 181 | } |
Harald Welte | 41b85d5 | 2015-08-31 08:56:53 +0200 | [diff] [blame^] | 182 | |
| 183 | asn_enc_rval_t |
| 184 | NULL_encode_aper(asn_TYPE_descriptor_t *td, asn_per_constraints_t *constraints, |
| 185 | void *sptr, asn_per_outp_t *po) { |
| 186 | asn_enc_rval_t er; |
| 187 | |
| 188 | (void)td; |
| 189 | (void)constraints; |
| 190 | (void)sptr; |
| 191 | (void)po; |
| 192 | |
| 193 | er.encoded = 0; |
| 194 | _ASN_ENCODED_OK(er); |
| 195 | } |