mirror of https://github.com/getdnsapi/getdns.git
Repeating and special rdata field 2 wireformat
This commit is contained in:
Willem Toorop
parent
0433c47466
commit
b0aae6b51d
132
src/rr-dict.c
132
src/rr-dict.c
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@ -487,7 +487,7 @@ static getdns_return_t
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hip_public_key_2wire(
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const getdns_bindata *value, uint8_t *rdata, uint8_t *rdf, size_t *rdf_len)
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{
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if (rdata > rdf - 4 || rdata + rdata[1] != rdf)
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if (rdata > rdf - 4 || rdata + 4 + rdata[0] != rdf)
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return GETDNS_RETURN_GENERIC_ERROR;
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if (value && value->size > 0xFFFF)
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return GETDNS_RETURN_INVALID_PARAMETER;
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@ -1057,74 +1057,109 @@ write_bindata_rdata(gldns_buffer *buf,
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static getdns_return_t
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write_rdata_field(gldns_buffer *buf,
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_getdns_rdf_type type, const char *name, getdns_dict *rdata)
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write_rdata_field(gldns_buffer *buf, uint8_t *rdata_start,
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const _getdns_rdata_def *rd_def, getdns_dict *rdata)
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{
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getdns_return_t r;
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getdns_list *list;
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uint32_t value;
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getdns_bindata *bindata;
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size_t i;
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size_t i, rdf_len;
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if (type & GETDNS_RDF_INTEGER) {
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if (!(type & GETDNS_RDF_REPEAT)) {
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if ((r = getdns_dict_get_int(rdata, name, &value)))
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if (rd_def->type & GETDNS_RDF_INTEGER) {
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if (!(rd_def->type & GETDNS_RDF_REPEAT)) {
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if ((r = getdns_dict_get_int(
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rdata, rd_def->name, &value)))
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return r;
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else
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write_int_rdata(buf, type, value);
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write_int_rdata(buf, rd_def->type, value);
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} else if ((r = getdns_dict_get_list(rdata, name, &list)))
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return r;
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} else if ((r = getdns_dict_get_list(
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rdata, rd_def->name, &list)))
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return r == GETDNS_RETURN_NO_SUCH_DICT_NAME
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? GETDNS_RETURN_GOOD : r;
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else for ( i = 0
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; GETDNS_RETURN_GOOD ==
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(r = getdns_list_get_int(list, i, &value))
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; i++)
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write_int_rdata(buf, type, value);
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write_int_rdata(buf, rd_def->type, value);
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if (r != GETDNS_RETURN_NO_SUCH_LIST_ITEM)
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return r;
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} else if (type & GETDNS_RDF_BINDATA) {
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if (!(type & GETDNS_RDF_REPEAT)) {
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if ((r = getdns_dict_get_bindata(rdata,name,&bindata)))
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} else if (rd_def->type & GETDNS_RDF_BINDATA) {
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if (!(rd_def->type & GETDNS_RDF_REPEAT)) {
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if ((r = getdns_dict_get_bindata(
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rdata, rd_def->name, &bindata)))
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return r;
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else
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write_bindata_rdata(buf, type, bindata);
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write_bindata_rdata(buf, rd_def->type, bindata);
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} else if ((r = getdns_dict_get_list(rdata, name, &list)))
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return r;
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} else if ((r = getdns_dict_get_list(
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rdata, rd_def->name, &list)))
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return r == GETDNS_RETURN_NO_SUCH_DICT_NAME
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? GETDNS_RETURN_GOOD : r;
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else for ( i = 0
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; GETDNS_RETURN_GOOD ==
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(r = getdns_list_get_bindata(list, i, &bindata))
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; i++)
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write_bindata_rdata(buf, type, bindata);
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write_bindata_rdata(buf, rd_def->type, bindata);
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if (r != GETDNS_RETURN_NO_SUCH_LIST_ITEM)
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return r;
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} else
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/* TODO: Handle the special types */
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} else if (!(rd_def->type & GETDNS_RDF_SPECIAL)) {
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/* Unknown rdata type */
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return GETDNS_RETURN_GENERIC_ERROR;
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return GETDNS_RETURN_GOOD;
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} else if (!(rd_def->type & GETDNS_RDF_REPEAT)) {
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rdf_len = gldns_buffer_remaining(buf);
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r = rd_def->special->dict2wire(rdata, rdata_start,
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gldns_buffer_current(buf), &rdf_len);
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if (r == GETDNS_RETURN_GOOD ||
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r == GETDNS_RETURN_NEED_MORE_SPACE)
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gldns_buffer_skip(buf, rdf_len);
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if (r)
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return r;
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} else if ((r = getdns_dict_get_list(rdata, rd_def->name, &list))) {
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return r == GETDNS_RETURN_NO_SUCH_DICT_NAME
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? GETDNS_RETURN_GOOD : r;
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} else for ( i = 0; r == GETDNS_RETURN_GOOD; i++ ) {
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rdf_len = gldns_buffer_remaining(buf);
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r = rd_def->special->list2wire(list, i, rdata_start,
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gldns_buffer_current(buf), &rdf_len);
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if (r == GETDNS_RETURN_GOOD ||
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r == GETDNS_RETURN_NEED_MORE_SPACE)
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gldns_buffer_skip(buf, rdf_len);
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}
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return r != GETDNS_RETURN_NO_SUCH_LIST_ITEM ? r : GETDNS_RETURN_GOOD;
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}
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getdns_return_t
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_getdns_rr_dict2wire(const getdns_dict *rr_dict, gldns_buffer *buf)
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{
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getdns_return_t r = GETDNS_RETURN_GOOD;
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struct getdns_bindata *name;
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struct getdns_bindata *rdata_raw;
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struct getdns_dict *rdata;
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getdns_bindata *name;
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getdns_bindata *rdata_raw;
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getdns_dict *rdata;
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uint32_t rr_type;
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uint32_t rr_class = GETDNS_RRCLASS_IN;
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uint32_t rr_ttl = 0;
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const _getdns_rr_def *rr_def;
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const _getdns_rdata_def *rd_def;
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int n_rdata_fields;
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const _getdns_rdata_def *rd_def, *rep_rd_def;
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int n_rdata_fields, rep_n_rdata_fields;
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size_t rdata_size_mark;
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uint8_t *rdata_start;
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getdns_list *list;
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size_t i;
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assert(rr_dict);
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assert(buf);
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@ -1166,20 +1201,47 @@ _getdns_rr_dict2wire(const getdns_dict *rr_dict, gldns_buffer *buf)
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} else if (n_rdata_fields || r == GETDNS_RETURN_NO_SUCH_DICT_NAME) {
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r = GETDNS_RETURN_GOOD;
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rdata_size_mark = gldns_buffer_position(buf);
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gldns_buffer_skip(buf, 2);
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rdata_start = gldns_buffer_current(buf);
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for ( rd_def = rr_def->rdata
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, n_rdata_fields = rr_def->n_rdata_fields
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; n_rdata_fields ; n_rdata_fields-- , rd_def++ ) {
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if (rd_def->type == GETDNS_RDF_REPEAT)
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break;
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if (rd_def->type != GETDNS_RDF_REPEAT) {
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if ((r = write_rdata_field(
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buf, rd_def->type, rd_def->name, rdata)))
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if ((r = write_rdata_field(buf,
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rdata_start, rd_def, rdata)))
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break;
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}
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if (n_rdata_fields == 0 || r) {
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/* pass */;
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} else if ((r = getdns_dict_get_list(
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rdata, rd_def->name, &list))) {
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/* pass */;
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} else for ( i = 0
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; r == GETDNS_RETURN_GOOD
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; i++) {
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if ((r = getdns_list_get_dict(list, i, &rdata))) {
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if (r == GETDNS_RETURN_NO_SUCH_LIST_ITEM)
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r = GETDNS_RETURN_GOOD;
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break;
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}
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/* TODO: Deal with repeat blocks */
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for ( rep_rd_def = rd_def + 1
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, rep_n_rdata_fields = n_rdata_fields - 1
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; rep_n_rdata_fields
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; rep_n_rdata_fields--, rep_rd_def++ ) {
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if ((r = write_rdata_field(buf,
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rdata_start, rep_rd_def, rdata)))
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break;
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}
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}
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gldns_buffer_write_u16_at(buf, rdata_size_mark,
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(uint16_t)(gldns_buffer_position(buf)-rdata_size_mark-2));
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@ -132,15 +132,15 @@ typedef enum _getdns_rdf_wf_type {
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} _getdns_rdf_type;
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typedef struct _getdns_rdata_def {
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const char *name;
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const char *name;
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_getdns_rdf_type type;
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_getdns_rdf_special *special;
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} _getdns_rdata_def;
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typedef struct _getdns_rr_def {
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const char *name;
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const char *name;
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const _getdns_rdata_def *rdata;
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int n_rdata_fields;
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int n_rdata_fields;
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} _getdns_rr_def;
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const _getdns_rr_def *_getdns_rr_def_lookup(uint16_t rr_type);
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@ -54,38 +54,91 @@ int main()
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getdns_dict *rr_dict;
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getdns_bindata *dns_name;
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getdns_bindata address = { 4, "\xb9\x31\x8d\x25" };
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getdns_bindata nothing = { 8, "\x07nothing" };
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getdns_bindata fourth = { 11, "last string" };
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size_t length;
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getdns_list *list;
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char *str;
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uint8_t wire_buf[4096], *wire = wire_buf, *end_of_wire;
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size_t wire_len = sizeof(wire_buf);
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size_t wire_len;
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/* Convert string to rr_dict
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*/
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if ((r = getdns_str2rr_dict(
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"some.domain.tld. 60 CH TXT \"first string\" second \"and third\"",
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"some.domain.tld. 60 IN TXT \"first string\" second \"and third\"",
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&rr_dict, NULL, 3600)))
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FAIL_r("getdns_str2rr_dict");
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/* Add a fourth text element.
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*/
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if ((r = getdns_dict_set_bindata(rr_dict, "/rdata/txt_strings/-", &fourth)))
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FAIL_r("getdns_list_set_bindata");
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print_dict(rr_dict);
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/* Convert to wireformat from rdata_raw.
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* Added fourth list element should NOT show.
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*/
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wire_len = sizeof(wire_buf);
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if ((r = getdns_rr_dict2wire(rr_dict, wire, &wire_len)))
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FAIL_r("getdns_rr_dict2wire");
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print_wire(wire, wire_len);
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/* Convert to wireformat from parsing rdata fields.
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* Added fourth list element should show.
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*/
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if ((r = getdns_dict_remove_name(rr_dict, "/rdata/rdata_raw")))
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FAIL_r("getdns_dict_remove_name");
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print_dict(rr_dict);
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printf("\nremoved \"/rdata/rdata_raw\":\n\n");
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wire_len = sizeof(wire_buf);
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if ((r = getdns_rr_dict2wire(rr_dict, wire, &wire_len)))
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FAIL_r("getdns_rr_dict2wire");
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print_wire(wire, wire_len);
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/* Remove second and third string elements and show text format.
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*/
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if ((r = getdns_dict_remove_name(rr_dict, "/rdata/txt_strings/1")))
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FAIL_r("getdns_dict_remove_name");
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if ((r = getdns_dict_remove_name(rr_dict, "/rdata/txt_strings/1")))
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FAIL_r("getdns_dict_remove_name");
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if ((r = getdns_rr_dict2str(rr_dict, &str)))
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FAIL_r("getdns_rr_dict2str");
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printf("\n%s", str);
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free(str);
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/* Remove all string elements and show text format.
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*/
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if ((r = getdns_dict_remove_name(rr_dict, "/rdata/txt_strings/0")))
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FAIL_r("getdns_dict_remove_name");
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if ((r = getdns_dict_remove_name(rr_dict, "/rdata/txt_strings/0")))
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FAIL_r("getdns_dict_remove_name");
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if ((r = getdns_rr_dict2str(rr_dict, &str)))
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FAIL_r("getdns_rr_dict2str");
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printf("%s", str);
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free(str);
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getdns_dict_destroy(rr_dict);
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/* Forward wireformat to test scanning from wireformat later on
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*/
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wire += wire_len;
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wire_len = sizeof(wire_buf) - (wire - wire_buf);
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/* Construct rr_dict and convert to string
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*/
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if (!(rr_dict = getdns_dict_create()))
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FAIL("getdns_dict_create returned NULL");
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@ -108,6 +161,7 @@ int main()
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FAIL_r("getdns_rr_dict2str");
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printf("\n%s\n", str);
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free(str);
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if ((r = getdns_rr_dict2wire(rr_dict, wire, &wire_len)))
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FAIL_r("getdns_rr_dict2wire");
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@ -118,6 +172,73 @@ int main()
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wire += wire_len;
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wire_len = sizeof(wire_buf) - (wire - wire_buf);
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/* Convert RR with special rdata fields and repeating last element
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* from string to rr_dict
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*/
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if ((r = getdns_str2rr_dict(
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"hip2 IN HIP 2 200100107B1A74DF365639CC39F1D578 AwEAAbdxyhNuSutc5EMzxTs9LBPCIkOFH8cIvM4p9+LrV4e19WzK00+CI6zBCQTdtWsuxKbWIy87UOoJTwkUs7lBu+Upr1gsNrut79ryra+bSRGQb1slImA8YVJyuIDsj7kwzG7jnERNqnWxZ48AWkskmdHaVDP4BcelrTI3rMXdXF5D rvs1.example.com. rvs2.example.com.",
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&rr_dict, "nlnetlabs.nl", 3600)))
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FAIL_r("getdns_str2rr_dict");
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if ((r = getdns_dict_remove_name(rr_dict, "/rdata/rdata_raw")))
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FAIL_r("getdns_dict_remove_name");
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printf("\n");
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print_dict(rr_dict);
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/* Convert RR with special rdata fields and repeating last element
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* back to string.
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*/
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if ((r = getdns_rr_dict2str(rr_dict, &str)))
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FAIL_r("getdns_rr_dict2str");
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printf("%s", str);
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free(str);
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/* Convert RR with special rdata fields without repeating last element
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* to string.
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*/
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if ((r = getdns_dict_remove_name(rr_dict, "/rdata/rendezvous_servers")))
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FAIL_r("getdns_dict_remove_name");
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if ((r = getdns_dict_get_bindata(rr_dict, "name", &dns_name)))
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FAIL_r("getdns_dict_get_bindata");
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dns_name->data[4] = '0';
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if ((r = getdns_rr_dict2str(rr_dict, &str)))
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FAIL_r("getdns_rr_dict2str");
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printf("%s\n", str);
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free(str);
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getdns_dict_destroy(rr_dict);
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/* Convert RR with repeat block from string to rr_dict
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*/
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if ((r = getdns_str2rr_dict(
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"apl APL 1:192.168.42.0/26 1:192.168.42.64/26 !1:192.168.42.128/25 1:224.0.0.0/4 2:FF00:0:0:0:0:0:0:0/8",
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&rr_dict, "net-dns.org", 3600)))
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FAIL_r("getdns_str2rr_dict");
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if ((r = getdns_dict_remove_name(rr_dict, "/rdata/rdata_raw")))
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FAIL_r("getdns_dict_remove_name");
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print_dict(rr_dict);
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/* Convert repeat block from rr_dict back to string.
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*/
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if ((r = getdns_rr_dict2str(rr_dict, &str)))
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FAIL_r("getdns_rr_dict2str");
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printf("%s", str);
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free(str);
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getdns_dict_destroy(rr_dict);
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/* Parse over wire data, convert to string via dict, and print */
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end_of_wire = wire;
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wire = wire_buf;
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@ -1,5 +1,5 @@
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{
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"class": GETDNS_RRCLASS_CH,
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"class": GETDNS_RRCLASS_IN,
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"name": <bindata of "some.domain.tld.">,
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"rdata":
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{
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@ -8,38 +8,95 @@
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[
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<bindata of "first string">,
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<bindata of "second">,
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<bindata of "and third">
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<bindata of "and third">,
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<bindata of "last string">
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]
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},
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"ttl": 60,
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"type": GETDNS_RRTYPE_TXT
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}
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0000 04 73 6f 6d 65 06 64 6f 6d 61 69 6e 03 74 6c 64 .some.do main.tld
|
||||
0010 00 00 10 00 03 00 00 00 3c 00 1e 0c 66 69 72 73 ........ <...firs
|
||||
0010 00 00 10 00 01 00 00 00 3c 00 1e 0c 66 69 72 73 ........ <...firs
|
||||
0020 74 20 73 74 72 69 6e 67 06 73 65 63 6f 6e 64 09 t string .second.
|
||||
0030 61 6e 64 20 74 68 69 72 64 and thir d.......
|
||||
{
|
||||
"class": GETDNS_RRCLASS_CH,
|
||||
"name": <bindata of "some.domain.tld.">,
|
||||
"rdata":
|
||||
{
|
||||
"txt_strings":
|
||||
[
|
||||
<bindata of "first string">,
|
||||
<bindata of "second">,
|
||||
<bindata of "and third">
|
||||
]
|
||||
},
|
||||
"ttl": 60,
|
||||
"type": GETDNS_RRTYPE_TXT
|
||||
}
|
||||
|
||||
removed "/rdata/rdata_raw":
|
||||
|
||||
0000 04 73 6f 6d 65 06 64 6f 6d 61 69 6e 03 74 6c 64 .some.do main.tld
|
||||
0010 00 00 10 00 03 00 00 00 3c 00 1e 0c 66 69 72 73 ........ <...firs
|
||||
0010 00 00 10 00 01 00 00 00 3c 00 2a 0c 66 69 72 73 ........ <.*.firs
|
||||
0020 74 20 73 74 72 69 6e 67 06 73 65 63 6f 6e 64 09 t string .second.
|
||||
0030 61 6e 64 20 74 68 69 72 64 and thir d.......
|
||||
0030 61 6e 64 20 74 68 69 72 64 0b 6c 61 73 74 20 73 and thir d.last s
|
||||
0040 74 72 69 6e 67 tring... ........
|
||||
|
||||
some.domain.tld. 60 IN TXT "first string" "last string"
|
||||
some.domain.tld. 60 IN TXT \# 0
|
||||
|
||||
www.getdnsapi.net. 0 IN A 185.49.141.37
|
||||
|
||||
0000 03 77 77 77 09 67 65 74 64 6e 73 61 70 69 03 6e .www.get dnsapi.n
|
||||
0010 65 74 00 00 01 00 01 00 00 00 00 00 04 b9 31 8d et...... ......1.
|
||||
0020 25 %....... ........
|
||||
|
||||
{
|
||||
"class": GETDNS_RRCLASS_IN,
|
||||
"name": <bindata of "hip2.nlnetlabs.nl.">,
|
||||
"rdata":
|
||||
{
|
||||
"hit": <bindata of 0x200100107b1a74df365639cc39f1d578>,
|
||||
"pk_algorithm": 2,
|
||||
"public_key": <bindata of 0x03010001b771ca136e4aeb5ce44333c5...>,
|
||||
"rendezvous_servers":
|
||||
[
|
||||
<bindata of "rvs1.example.com.">,
|
||||
<bindata of "rvs2.example.com.">
|
||||
]
|
||||
},
|
||||
"ttl": 3600,
|
||||
"type": GETDNS_RRTYPE_HIP
|
||||
}
|
||||
hip2.nlnetlabs.nl. 3600 IN HIP 2 200100107B1A74DF365639CC39F1D578 AwEAAbdxyhNuSutc5EMzxTs9LBPCIkOFH8cIvM4p9+LrV4e19WzK00+CI6zBCQTdtWsuxKbWIy87UOoJTwkUs7lBu+Upr1gsNrut79ryra+bSRGQb1slImA8YVJyuIDsj7kwzG7jnERNqnWxZ48AWkskmdHaVDP4BcelrTI3rMXdXF5D rvs1.example.com. rvs2.example.com.
|
||||
hip0.nlnetlabs.nl. 3600 IN HIP 2 200100107B1A74DF365639CC39F1D578 AwEAAbdxyhNuSutc5EMzxTs9LBPCIkOFH8cIvM4p9+LrV4e19WzK00+CI6zBCQTdtWsuxKbWIy87UOoJTwkUs7lBu+Upr1gsNrut79ryra+bSRGQb1slImA8YVJyuIDsj7kwzG7jnERNqnWxZ48AWkskmdHaVDP4BcelrTI3rMXdXF5D
|
||||
|
||||
{
|
||||
"class": GETDNS_RRCLASS_IN,
|
||||
"name": <bindata of "apl.net-dns.org.">,
|
||||
"rdata":
|
||||
{
|
||||
"apitems":
|
||||
[
|
||||
{
|
||||
"address_family": 1,
|
||||
"afdpart": <bindata of 0xc0a82a>,
|
||||
"n": 0,
|
||||
"prefix": 26
|
||||
},
|
||||
{
|
||||
"address_family": 1,
|
||||
"afdpart": <bindata of 0xc0a82a40>,
|
||||
"n": 0,
|
||||
"prefix": 26
|
||||
},
|
||||
{
|
||||
"address_family": 1,
|
||||
"afdpart": <bindata of 0xc0a82a80>,
|
||||
"n": 1,
|
||||
"prefix": 25
|
||||
},
|
||||
{
|
||||
"address_family": 1,
|
||||
"afdpart": <bindata of 0xe0>,
|
||||
"n": 0,
|
||||
"prefix": 4
|
||||
},
|
||||
{
|
||||
"address_family": 2,
|
||||
"afdpart": <bindata of 0xff>,
|
||||
"n": 0,
|
||||
"prefix": 8
|
||||
}
|
||||
]
|
||||
},
|
||||
"ttl": 3600,
|
||||
"type": GETDNS_RRTYPE_APL
|
||||
}
|
||||
apl.net-dns.org. 3600 IN APL 1:192.168.42.0/26 1:192.168.42.64/26 !1:192.168.42.128/25 1:224.0.0.0/4 2:ff00:0000:0000:0000:0000:0000:0000:0000/8
|
||||
|
|
|
|||
Loading…
Reference in New Issue