/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2018 - 2019, 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"
static CURLcode unit_setup(void)
{
return CURLE_OK;
}
static void unit_stop(void)
{
}
#ifdef USE_NGHTTP2
#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;
memset(&d, 0, sizeof(d));
rc = doh_decode((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 ", d.cname[u].alloc);
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((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((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((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 /* USE_NGHTTP2 */
UNITTEST_START
{
return 1; /* nothing to do, just fail */
}
UNITTEST_STOP
#endif