projects/stargazer/plugins/other/snmp/asn1/constr_SEQUENCE_OF.c

   1 /*-
   2  * Copyright (c) 2003, 2004, 2006 Lev Walkin <vlm@lionet.info>.
   3  * All rights reserved.
   4  * Redistribution and modifications are permitted subject to BSD license.
   5  */
   6 #include <asn_internal.h>
   7 #include <constr_SEQUENCE_OF.h>
   8 #include <asn_SEQUENCE_OF.h>
   9
  10 /*
  11  * The DER encoder of the SEQUENCE OF type.
  12  */
  13 asn_enc_rval_t
  14 SEQUENCE_OF_encode_der(asn_TYPE_descriptor_t *td, void *ptr,
  15         int tag_mode, ber_tlv_tag_t tag,
  16         asn_app_consume_bytes_f *cb, void *app_key) {
  17         asn_TYPE_member_t *elm = td->elements;
  18         asn_anonymous_sequence_ *list = _A_SEQUENCE_FROM_VOID(ptr);
  19         size_t computed_size = 0;
  20         ssize_t encoding_size = 0;
  21         asn_enc_rval_t erval;
  22         int edx;
  23
  24         ASN_DEBUG("Estimating size of SEQUENCE OF %s", td->name);
  25
  26         /*
  27          * Gather the length of the underlying members sequence.
  28          */
  29         for(edx = 0; edx < list->count; edx++) {
  30                 void *memb_ptr = list->array[edx];
  31                 if(!memb_ptr) continue;
  32                 erval = elm->type->der_encoder(elm->type, memb_ptr,
  33                         0, elm->tag,
  34                         0, 0);
  35                 if(erval.encoded == -1)
  36                         return erval;
  37                 computed_size += erval.encoded;
  38         }
  39
  40         /*
  41          * Encode the TLV for the sequence itself.
  42          */
  43         encoding_size = der_write_tags(td, computed_size, tag_mode, 1, tag,
  44                 cb, app_key);
  45         if(encoding_size == -1) {
  46                 erval.encoded = -1;
  47                 erval.failed_type = td;
  48                 erval.structure_ptr = ptr;
  49                 return erval;
  50         }
  51
  52         computed_size += encoding_size;
  53         if(!cb) {
  54                 erval.encoded = computed_size;
  55                 _ASN_ENCODED_OK(erval);
  56         }
  57
  58         ASN_DEBUG("Encoding members of SEQUENCE OF %s", td->name);
  59
  60         /*
  61          * Encode all members.
  62          */
  63         for(edx = 0; edx < list->count; edx++) {
  64                 void *memb_ptr = list->array[edx];
  65                 if(!memb_ptr) continue;
  66                 erval = elm->type->der_encoder(elm->type, memb_ptr,
  67                         0, elm->tag,
  68                         cb, app_key);
  69                 if(erval.encoded == -1)
  70                         return erval;
  71                 encoding_size += erval.encoded;
  72         }
  73
  74         if(computed_size != (size_t)encoding_size) {
  75                 /*
  76                  * Encoded size is not equal to the computed size.
  77                  */
  78                 erval.encoded = -1;
  79                 erval.failed_type = td;
  80                 erval.structure_ptr = ptr;
  81         } else {
  82                 erval.encoded = computed_size;
  83                 erval.structure_ptr = 0;
  84                 erval.failed_type = 0;
  85         }
  86
  87         return erval;
  88 }
  89
  90 asn_enc_rval_t
  91 SEQUENCE_OF_encode_xer(asn_TYPE_descriptor_t *td, void *sptr,
  92         int ilevel, enum xer_encoder_flags_e flags,
  93                 asn_app_consume_bytes_f *cb, void *app_key) {
  94         asn_enc_rval_t er;
  95         asn_SET_OF_specifics_t *specs = (asn_SET_OF_specifics_t *)td->specifics;
  96         asn_TYPE_member_t *elm = td->elements;
  97         asn_anonymous_sequence_ *list = _A_SEQUENCE_FROM_VOID(sptr);
  98         const char *mname = specs->as_XMLValueList
  99                 ? 0 : ((*elm->name) ? elm->name : elm->type->xml_tag);
 100         unsigned int mlen = mname ? strlen(mname) : 0;
 101         int xcan = (flags & XER_F_CANONICAL);
 102         int i;
 103
 104         if(!sptr) _ASN_ENCODE_FAILED;
 105
 106         er.encoded = 0;
 107
 108         for(i = 0; i < list->count; i++) {
 109                 asn_enc_rval_t tmper;
 110                 void *memb_ptr = list->array[i];
 111                 if(!memb_ptr) continue;
 112
 113                 if(mname) {
 114                         if(!xcan) _i_ASN_TEXT_INDENT(1, ilevel);
 115                         _ASN_CALLBACK3("<", 1, mname, mlen, ">", 1);
 116                 }
 117
 118                 tmper = elm->type->xer_encoder(elm->type, memb_ptr,
 119                                 ilevel + 1, flags, cb, app_key);
 120                 if(tmper.encoded == -1) return tmper;
 121                 if(tmper.encoded == 0 && specs->as_XMLValueList) {
 122                         const char *name = elm->type->xml_tag;
 123                         size_t len = strlen(name);
 124                         if(!xcan) _i_ASN_TEXT_INDENT(1, ilevel + 1);
 125                         _ASN_CALLBACK3("<", 1, name, len, "/>", 2);
 126                 }
 127
 128                 if(mname) {
 129                         _ASN_CALLBACK3("</", 2, mname, mlen, ">", 1);
 130                         er.encoded += 5;
 131                 }
 132
 133                 er.encoded += (2 * mlen) + tmper.encoded;
 134         }
 135
 136         if(!xcan) _i_ASN_TEXT_INDENT(1, ilevel - 1);
 137
 138         _ASN_ENCODED_OK(er);
 139 cb_failed:
 140         _ASN_ENCODE_FAILED;
 141 }
 142
 143 asn_enc_rval_t
 144 SEQUENCE_OF_encode_uper(asn_TYPE_descriptor_t *td,
 145         asn_per_constraints_t *constraints, void *sptr, asn_per_outp_t *po) {
 146         asn_anonymous_sequence_ *list;
 147         asn_per_constraint_t *ct;
 148         asn_enc_rval_t er;
 149         asn_TYPE_member_t *elm = td->elements;
 150         int seq;
 151
 152         if(!sptr) _ASN_ENCODE_FAILED;
 153         list = _A_SEQUENCE_FROM_VOID(sptr);
 154
 155         er.encoded = 0;
 156
 157         ASN_DEBUG("Encoding %s as SEQUENCE OF (%d)", td->name, list->count);
 158
 159         if(constraints) ct = &constraints->size;
 160         else if(td->per_constraints) ct = &td->per_constraints->size;
 161         else ct = 0;
 162
 163         /* If extensible constraint, check if size is in root */
 164         if(ct) {
 165                 int not_in_root = (list->count < ct->lower_bound
 166                                 || list->count > ct->upper_bound);
 167                 ASN_DEBUG("lb %ld ub %ld %s",
 168                         ct->lower_bound, ct->upper_bound,
 169                         ct->flags & APC_EXTENSIBLE ? "ext" : "fix");
 170                 if(ct->flags & APC_EXTENSIBLE) {
 171                         /* Declare whether size is in extension root */
 172                         if(per_put_few_bits(po, not_in_root, 1))
 173                                 _ASN_ENCODE_FAILED;
 174                         if(not_in_root) ct = 0;
 175                 } else if(not_in_root && ct->effective_bits >= 0)
 176                         _ASN_ENCODE_FAILED;
 177         }
 178
 179         if(ct && ct->effective_bits >= 0) {
 180                 /* X.691, #19.5: No length determinant */
 181                 if(per_put_few_bits(po, list->count - ct->lower_bound,
 182                                 ct->effective_bits))
 183                         _ASN_ENCODE_FAILED;
 184         }
 185
 186         for(seq = -1; seq < list->count;) {
 187                 ssize_t mayEncode;
 188                 if(seq < 0) seq = 0;
 189                 if(ct && ct->effective_bits >= 0) {
 190                         mayEncode = list->count;
 191                 } else {
 192                         mayEncode = uper_put_length(po, list->count - seq);
 193                         if(mayEncode < 0) _ASN_ENCODE_FAILED;
 194                 }
 195
 196                 while(mayEncode--) {
 197                         void *memb_ptr = list->array[seq++];
 198                         if(!memb_ptr) _ASN_ENCODE_FAILED;
 199                         er = elm->type->uper_encoder(elm->type,
 200                                 elm->per_constraints, memb_ptr, po);
 201                         if(er.encoded == -1)
 202                                 _ASN_ENCODE_FAILED;
 203                 }
 204         }
 205
 206         _ASN_ENCODED_OK(er);
 207 }
 208