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Check multi-line output from dns_rdata_tofmttext()

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Check that multi-line output from dns_rdata_tofmttext() can be read
back in by dns_rdata_fromtext().
This commit is contained in:
Mark Andrews 2019-02-28 17:06:01 +11:00
parent 1a75a5cee6
commit b089f43b7a
1 changed files with 52 additions and 1 deletions
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53
lib/dns/tests/rdata_test.c
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@ -299,6 +299,53 @@ check_text_conversions(dns_rdata_t *rdata) {
assert_memory_equal(buf_fromtext, rdata->data, rdata->length); assert_memory_equal(buf_fromtext, rdata->data, rdata->length);
} }
/*
* Test whether converting rdata to multi-line text form and then parsing the
* result of that conversion again results in the same uncompressed wire form.
* This checks whether multi-line totext_*() output is parsable by fromtext_*()
* for given RR class and type.
*
* This function is called for every input RDATA which is successfully parsed
* by check_wire_ok_single() and whose type is not a meta-type.
*/
static void
check_multiline_text_conversions(dns_rdata_t *rdata) {
char buf_totext[1024] = { 0 };
unsigned char buf_fromtext[1024];
isc_result_t result;
isc_buffer_t target;
dns_rdata_t rdata2 = DNS_RDATA_INIT;
unsigned int flags;
/*
* Convert uncompressed wire form RDATA into multi-line text form.
* This conversion must succeed since input RDATA was successfully
* parsed by check_wire_ok_single().
*/
isc_buffer_init(&target, buf_totext, sizeof(buf_totext));
flags = dns_master_styleflags(&dns_master_style_default);
result = dns_rdata_tofmttext(rdata, dns_rootname, flags, 80 - 32, 4,
"\n", &target);
assert_int_equal(result, ISC_R_SUCCESS);
/*
* Ensure buf_totext is properly NUL terminated as
* dns_rdata_tofmttext() may attempt different output formats
* writing into the apparently unused part of the buffer.
*/
isc_buffer_putuint8(&target, 0);
/*
* Try parsing multi-line text form RDATA output by
* dns_rdata_tofmttext() again.
*/
result = dns_test_rdatafromstring(&rdata2, rdata->rdclass, rdata->type,
buf_fromtext, sizeof(buf_fromtext),
buf_totext, false);
assert_int_equal(result, ISC_R_SUCCESS);
assert_int_equal(rdata2.length, rdata->length);
assert_memory_equal(buf_fromtext, rdata->data, rdata->length);
}
/* /*
* Test whether supplied wire form RDATA is properly handled as being either * Test whether supplied wire form RDATA is properly handled as being either
* valid or invalid for an RR of given rdclass and type. * valid or invalid for an RR of given rdclass and type.
@ -329,12 +376,16 @@ check_wire_ok_single(const wire_ok_t *wire_ok, dns_rdataclass_t rdclass,
* between uncompressed wire form and type-specific struct. * between uncompressed wire form and type-specific struct.
* *
* If the RR type is not a meta-type, additionally perform two-way * If the RR type is not a meta-type, additionally perform two-way
* conversion checks between uncompressed wire form and text form. * conversion checks between:
*
* - uncompressed wire form and text form,
* - uncompressed wire form and multi-line text form.
*/ */
if (result == ISC_R_SUCCESS) { if (result == ISC_R_SUCCESS) {
check_struct_conversions(&rdata, structsize); check_struct_conversions(&rdata, structsize);
if (!dns_rdatatype_ismeta(rdata.type)) { if (!dns_rdatatype_ismeta(rdata.type)) {
check_text_conversions(&rdata); check_text_conversions(&rdata);
check_multiline_text_conversions(&rdata);
} }
} }
} }