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Add TXT record support

This commit is contained in:
Neel Goyal 2014-02-05 13:47:46 -05:00
parent ce74abc25a
commit 068092e276
1 changed files with 52 additions and 5 deletions
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57
src/rr-dict.c
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@ -10,7 +10,7 @@
/* /*
* Copyright (c) 2013, Versign, Inc. * Copyright (c) 2013, Versign, Inc.
* All rights reserved. * All rights reserved.
* *
* Redistribution and use in source and binary forms, with or without * Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met: * modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright * * Redistributions of source code must retain the above copyright
@ -45,7 +45,7 @@ struct rdata_def {
int type; int type;
}; };
struct rr_def { struct rr_def {
const char *name; const char *name;
const struct rdata_def *rdata; const struct rdata_def *rdata;
int n_rdata_fields; int n_rdata_fields;
@ -569,8 +569,50 @@ priv_getdns_rr_type_name(int rr_type)
return rr_def_lookup(rr_type)->name; return rr_def_lookup(rr_type)->name;
} }
/* list of txt records */
static getdns_return_t static getdns_return_t
priv_getdns_equip_dict_with_rdfs(struct getdns_dict *rdata, ldns_rr *rr) priv_getdns_equip_dict_with_txt_rdfs(struct getdns_dict* rdata, ldns_rr* rr,
const struct rr_def* def,
struct getdns_context* context) {
size_t i;
struct getdns_bindata bindata;
getdns_return_t r = GETDNS_RETURN_GOOD;
struct getdns_list* records = getdns_list_create_with_context(context);
if (!records) {
return GETDNS_RETURN_MEMORY_ERROR;
}
for (i = 0; i < ldns_rr_rd_count(rr) && r == GETDNS_RETURN_GOOD; ++i) {
ldns_rdf* rdf = ldns_rr_rdf(rr, i);
int rdf_size = (int) ldns_rdf_size(rdf);
uint8_t* rdf_data = ldns_rdf_data(rdf);
if (rdf_size < 1) {
r = GETDNS_RETURN_GENERIC_ERROR;
continue;
}
int txt_size = (int) rdf_data[0] + 1;
if (rdf_size < txt_size) {
r = GETDNS_RETURN_GENERIC_ERROR;
continue;
}
bindata.size = txt_size;
bindata.data = rdf_data + 1;
r = getdns_list_set_bindata(records, i, &bindata);
}
if (r != GETDNS_RETURN_GOOD) {
getdns_list_destroy(records);
} else {
r = getdns_dict_set_list(rdata, def->rdata[0].name, records);
if (r != GETDNS_RETURN_GOOD) {
getdns_list_destroy(records);
}
}
return r;
}
static getdns_return_t
priv_getdns_equip_dict_with_rdfs(struct getdns_dict *rdata, ldns_rr *rr,
struct getdns_context* context)
{ {
getdns_return_t r = GETDNS_RETURN_GOOD; getdns_return_t r = GETDNS_RETURN_GOOD;
const struct rr_def *def; const struct rr_def *def;
@ -582,6 +624,11 @@ priv_getdns_equip_dict_with_rdfs(struct getdns_dict *rdata, ldns_rr *rr)
assert(rr); assert(rr);
def = rr_def_lookup(ldns_rr_get_type(rr)); def = rr_def_lookup(ldns_rr_get_type(rr));
/* specialty handlers */
if (def->rdata == txt_rdata) {
return priv_getdns_equip_dict_with_txt_rdfs(rdata, rr, def, context);
}
/* generic */
for (i = 0; i < ldns_rr_rd_count(rr) && r == GETDNS_RETURN_GOOD; i++) { for (i = 0; i < ldns_rr_rd_count(rr) && r == GETDNS_RETURN_GOOD; i++) {
if (i >= def->n_rdata_fields) if (i >= def->n_rdata_fields)
break; break;
@ -659,7 +706,7 @@ priv_getdns_create_dict_from_rdfs(
break; break;
/* Now set the RR type specific attributes */ /* Now set the RR type specific attributes */
r = priv_getdns_equip_dict_with_rdfs(*rdata, rr); r = priv_getdns_equip_dict_with_rdfs(*rdata, rr, context);
if (r == GETDNS_RETURN_GOOD) if (r == GETDNS_RETURN_GOOD)
return r; return r;
} while(0); } while(0);
@ -799,7 +846,7 @@ priv_getdns_create_rr_from_dict(struct getdns_dict *rr_dict, ldns_rr **rr)
r = getdns_dict_get_bindata(rdata, "rdata_raw", &rdata_raw); r = getdns_dict_get_bindata(rdata, "rdata_raw", &rdata_raw);
if (r != GETDNS_RETURN_GOOD) if (r != GETDNS_RETURN_GOOD)
break; break;
s = ldns_wire2rdf(*rr, rdata_raw->data, rdata_raw->size, 0); s = ldns_wire2rdf(*rr, rdata_raw->data, rdata_raw->size, 0);
if (s == LDNS_STATUS_OK) if (s == LDNS_STATUS_OK)
return r; return r;