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2dd53e82f1
curl/tests/unit/unit1650.c
Daniel Stenberg ed35d6590e
dynbuf: introduce internal generic dynamic buffer functions 
A common set of functions instead of many separate implementations for
creating buffers that can grow when appending data to them. Existing
functionality has been ported over.

In my early basic testing, the total number of allocations seem at
roughly the same amount as before, possibly a few less.

See docs/DYNBUF.md for a description of the API.

Closes #5300
2020-05-04 10:40:39 +02:00

296 lines
9.2 KiB
C
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2018 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "curlcheck.h"
#include "doh.h"
#include "dynbuf.h"
static CURLcode unit_setup(void)
{
return CURLE_OK;
}
static void unit_stop(void)
{
}
#ifndef CURL_DISABLE_DOH
#define DNS_PREAMBLE "\x00\x00\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00"
#define LABEL_TEST "\x04\x74\x65\x73\x74"
#define LABEL_HOST "\x04\x68\x6f\x73\x74"
#define LABEL_NAME "\x04\x6e\x61\x6d\x65"
#define DNSA_TYPE "\x01"
#define DNSAAAA_TYPE "\x1c"
#define DNSA_EPILOGUE "\x00\x00" DNSA_TYPE "\x00\x01"
#define DNSAAAA_EPILOGUE "\x00\x00" DNSAAAA_TYPE "\x00\x01"
#define DNS_Q1 DNS_PREAMBLE LABEL_TEST LABEL_HOST LABEL_NAME DNSA_EPILOGUE
#define DNS_Q2 DNS_PREAMBLE LABEL_TEST LABEL_HOST LABEL_NAME DNSAAAA_EPILOGUE
struct dohrequest {
/* input */
const char *name;
DNStype type;
/* output */
const char *packet;
size_t size;
int rc;
};
static struct dohrequest req[] = {
{"test.host.name", DNS_TYPE_A, DNS_Q1, sizeof(DNS_Q1)-1, 0 },
{"test.host.name", DNS_TYPE_AAAA, DNS_Q2, sizeof(DNS_Q2)-1, 0 },
{"zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
".host.name",
DNS_TYPE_AAAA, NULL, 0, DOH_DNS_BAD_LABEL }
};
struct dohresp {
/* input */
const char *packet;
size_t size;
DNStype type;
/* output */
int rc;
const char *out;
};
#define DNS_FOO_EXAMPLE_COM \
"\x00\x00\x01\x00\x00\x01\x00\x01\x00\x00\x00\x00\x03\x66\x6f\x6f" \
"\x07\x65\x78\x61\x6d\x70\x6c\x65\x03\x63\x6f\x6d\x00\x00\x01\x00" \
"\x01\xc0\x0c\x00\x01\x00\x01\x00\x00\x00\x37\x00\x04\x7f\x00\x00" \
"\x01"
static const char full49[] = DNS_FOO_EXAMPLE_COM;
static struct dohresp resp[] = {
{"\x00\x00", 2, DNS_TYPE_A, DOH_TOO_SMALL_BUFFER, NULL },
{"\x00\x01\x00\x01\x00\x01\x00\x01\x00\x01\x00\x01", 12,
DNS_TYPE_A, DOH_DNS_BAD_ID, NULL },
{"\x00\x00\x00\x01\x00\x01\x00\x01\x00\x01\x00\x01", 12,
DNS_TYPE_A, DOH_DNS_BAD_RCODE, NULL },
{"\x00\x00\x01\x00\x00\x01\x00\x01\x00\x00\x00\x00\x03\x66\x6f\x6f", 16,
DNS_TYPE_A, DOH_DNS_OUT_OF_RANGE, NULL },
{"\x00\x00\x01\x00\x00\x01\x00\x01\x00\x00\x00\x00\x03\x66\x6f\x6f\x00", 17,
DNS_TYPE_A, DOH_DNS_OUT_OF_RANGE, NULL },
{"\x00\x00\x01\x00\x00\x01\x00\x01\x00\x00\x00\x00\x03\x66\x6f\x6f\x00"
"\x00\x01\x00\x01", 21,
DNS_TYPE_A, DOH_DNS_OUT_OF_RANGE, NULL },
{"\x00\x00\x01\x00\x00\x01\x00\x01\x00\x00\x00\x00\x03\x66\x6f\x6f\x00"
"\x00\x01\x00\x01"
"\x04", 18,
DNS_TYPE_A, DOH_DNS_OUT_OF_RANGE, NULL },
{"\x00\x00\x01\x00\x00\x01\x00\x01\x00\x00\x00\x00\x04\x63\x75\x72"
"\x6c\x04\x63\x75\x72\x6c\x00\x00\x05\x00\x01\xc0\x0c\x00\x05\x00"
"\x01\x00\x00\x00\x37\x00\x11\x08\x61\x6e\x79\x77\x68\x65\x72\x65"
"\x06\x72\x65\x61\x6c\x6c\x79\x00", 56,
DNS_TYPE_A, DOH_OK, "anywhere.really "},
{DNS_FOO_EXAMPLE_COM, 49, DNS_TYPE_A, DOH_OK, "127.0.0.1 "},
{"\x00\x00\x01\x00\x00\x01\x00\x01\x00\x00\x00\x00\x04\x61\x61\x61"
"\x61\x07\x65\x78\x61\x6d\x70\x6c\x65\x03\x63\x6f\x6d\x00\x00\x1c"
"\x00\x01\xc0\x0c\x00\x1c\x00\x01\x00\x00\x00\x37\x00\x10\x20\x20"
"\x20\x20\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20\x20", 62,
DNS_TYPE_AAAA, DOH_OK,
"2020:2020:0000:0000:0000:0000:0000:2020 " },
{"\x00\x00\x01\x00\x00\x01\x00\x01\x00\x00\x00\x00\x04\x63\x75\x72"
"\x6c\x04\x63\x75\x72\x6c\x00\x00\x05\x00\x01\xc0\x0c\x00\x05\x00"
"\x01\x00\x00\x00\x37\x00"
"\x07\x03\x61\x6e\x79\xc0\x27\x00", 46,
DNS_TYPE_A, DOH_DNS_LABEL_LOOP, NULL},
/* packet with NSCOUNT == 1 */
{"\x00\x00\x01\x00\x00\x01\x00\x01\x00\x01\x00\x00\x04\x61\x61\x61"
"\x61\x07\x65\x78\x61\x6d\x70\x6c\x65\x03\x63\x6f\x6d\x00\x00\x1c"
"\x00\x01\xc0\x0c\x00\x1c\x00\x01\x00\x00\x00\x37\x00\x10\x20\x20"
"\x20\x20\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20\x20"
LABEL_TEST LABEL_HOST LABEL_NAME DNSAAAA_EPILOGUE "\x00\x00\x00\x01"
"\00\x04\x01\x01\x01\x01", /* RDDATA */
62 + 30,
DNS_TYPE_AAAA, DOH_OK,
"2020:2020:0000:0000:0000:0000:0000:2020 " },
/* packet with ARCOUNT == 1 */
{"\x00\x00\x01\x00\x00\x01\x00\x01\x00\x00\x00\x01\x04\x61\x61\x61"
"\x61\x07\x65\x78\x61\x6d\x70\x6c\x65\x03\x63\x6f\x6d\x00\x00\x1c"
"\x00\x01\xc0\x0c\x00\x1c\x00\x01\x00\x00\x00\x37\x00\x10\x20\x20"
"\x20\x20\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20\x20"
LABEL_TEST LABEL_HOST LABEL_NAME DNSAAAA_EPILOGUE "\x00\x00\x00\x01"
"\00\x04\x01\x01\x01\x01", /* RDDATA */
62 + 30,
DNS_TYPE_AAAA, DOH_OK,
"2020:2020:0000:0000:0000:0000:0000:2020 " },
};
UNITTEST_START
{
size_t size = 0;
unsigned char buffer[256];
size_t i;
unsigned char *p;
for(i = 0; i < sizeof(req) / sizeof(req[0]); i++) {
int rc = doh_encode(req[i].name, req[i].type,
buffer, sizeof(buffer), &size);
if(rc != req[i].rc) {
fprintf(stderr, "req %zu: Expected return code %d got %d\n", i,
req[i].rc, rc);
return 1;
}
else if(size != req[i].size) {
fprintf(stderr, "req %zu: Expected size %zu got %zu\n", i,
req[i].size, size);
fprintf(stderr, "DNS encode made: %s\n", hexdump(buffer, size));
return 2;
}
else if(req[i].packet && memcmp(req[i].packet, buffer, size)) {
fprintf(stderr, "DNS encode made: %s\n", hexdump(buffer, size));
fprintf(stderr, "... instead of: %s\n",
hexdump((unsigned char *)req[i].packet, size));
return 3;
}
}
for(i = 0; i < sizeof(resp) / sizeof(resp[0]); i++) {
struct dohentry d;
int rc;
char *ptr;
size_t len;
int u;
de_init(&d);
rc = doh_decode((const unsigned char *)resp[i].packet, resp[i].size,
resp[i].type, &d);
if(rc != resp[i].rc) {
fprintf(stderr, "resp %zu: Expected return code %d got %d\n", i,
resp[i].rc, rc);
return 4;
}
len = sizeof(buffer);
ptr = (char *)buffer;
for(u = 0; u < d.numaddr; u++) {
size_t o;
struct dohaddr *a;
a = &d.addr[u];
if(resp[i].type == DNS_TYPE_A) {
p = &a->ip.v4[0];
msnprintf(ptr, len, "%u.%u.%u.%u ", p[0], p[1], p[2], p[3]);
o = strlen(ptr);
len -= o;
ptr += o;
}
else {
int j;
for(j = 0; j < 16; j += 2) {
size_t l;
msnprintf(ptr, len, "%s%02x%02x", j?":":"", a->ip.v6[j],
a->ip.v6[j + 1]);
l = strlen(ptr);
len -= l;
ptr += l;
}
msnprintf(ptr, len, " ");
len--;
ptr++;
}
}
for(u = 0; u < d.numcname; u++) {
size_t o;
msnprintf(ptr, len, "%s ", Curl_dyn_ptr(&d.cname[u]));
o = strlen(ptr);
len -= o;
ptr += o;
}
de_cleanup(&d);
if(resp[i].out && strcmp((char *)buffer, resp[i].out)) {
fprintf(stderr, "resp %zu: Expected %s got %s\n", i,
resp[i].out, buffer);
return 1;
}
}
{
/* pass all sizes into the decoder until full */
for(i = 0; i < sizeof(full49)-1; i++) {
struct dohentry d;
int rc;
memset(&d, 0, sizeof(d));
rc = doh_decode((const unsigned char *)full49, i, DNS_TYPE_A, &d);
if(!rc) {
/* none of them should work */
fprintf(stderr, "%zu: %d\n", i, rc);
return 5;
}
}
/* and try all pieces from the other end of the packet */
for(i = 1; i < sizeof(full49); i++) {
struct dohentry d;
int rc;
memset(&d, 0, sizeof(d));
rc = doh_decode((const unsigned char *)&full49[i], sizeof(full49)-i-1,
DNS_TYPE_A, &d);
if(!rc) {
/* none of them should work */
fprintf(stderr, "2 %zu: %d\n", i, rc);
return 7;
}
}
{
int rc;
struct dohentry d;
struct dohaddr *a;
memset(&d, 0, sizeof(d));
rc = doh_decode((const unsigned char *)full49, sizeof(full49)-1,
DNS_TYPE_A, &d);
fail_if(d.numaddr != 1, "missing address");
a = &d.addr[0];
p = &a->ip.v4[0];
msnprintf((char *)buffer, sizeof(buffer),
"%u.%u.%u.%u", p[0], p[1], p[2], p[3]);
if(rc || strcmp((char *)buffer, "127.0.0.1")) {
fprintf(stderr, "bad address decoded: %s, rc == %d\n", buffer, rc);
return 7;
}
fail_if(d.numcname, "bad cname counter");
}
}
}
UNITTEST_STOP
#else /* CURL_DISABLE_DOH */
UNITTEST_START
{
return 1; /* nothing to do, just fail */
}
UNITTEST_STOP
#endif
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