Adding upstream version 3.3.4.upstream/3.3.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 178 insertions, 0 deletions

diff --git a/tests/modules/test_rrl.c b/tests/modules/test_rrl.c
new file mode 100644
index 0000000..6a5210f
--- /dev/null
+++ b/tests/modules/test_rrl.c
@@ -0,0 +1,178 @@
+/*  Copyright (C) 2019 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <tap/basic.h>
+
+#include "libdnssec/crypto.h"
+#include "libdnssec/random.h"
+#include "libknot/libknot.h"
+#include "contrib/sockaddr.h"
+#include "knot/modules/rrl/functions.c"
+#include "stdio.h"
+
+/* Enable time-dependent tests. */
+//#define ENABLE_TIMED_TESTS
+#define RRL_SIZE 196613
+#define RRL_THREADS 8
+#define RRL_INSERTS (RRL_SIZE/(5*RRL_THREADS)) /* lf = 1/5 */
+
+/* Disabled as default as it depends on random input.
+ * Table may be consistent even if some collision occur (and they may occur).
+ * Note: Disabled due to reported problems when running on VMs due to time
+ * flow inconsistencies. Should work alright on a host machine.
+ */
+#ifdef ENABLE_TIMED_TESTS
+struct bucketmap {
+	unsigned i;
+	uint64_t x;
+};
+
+/*! \brief Unit runnable. */
+struct runnable_data {
+	int passed;
+	rrl_table_t *rrl;
+	struct sockaddr_storage *addr;
+	rrl_req_t *rq;
+	knot_dname_t *zone;
+};
+
+static void* rrl_runnable(void *arg)
+{
+	struct runnable_data *d = (struct runnable_data *)arg;
+	struct sockaddr_storage addr;
+	memcpy(&addr, d->addr, sizeof(struct sockaddr_storage));
+	int lock = -1;
+	uint32_t now = time(NULL);
+	struct bucketmap *m = malloc(RRL_INSERTS * sizeof(struct bucketmap));
+	for (unsigned i = 0; i < RRL_INSERTS; ++i) {
+		m[i].i = dnssec_random_uint32_t();
+		((struct sockaddr_in *) &addr)->sin_addr.s_addr = m[i].i;
+		rrl_item_t *b = rrl_hash(d->rrl, &addr, d->rq, d->zone, now, &lock);
+		rrl_unlock(d->rrl, lock);
+		m[i].x = b->netblk;
+	}
+	for (unsigned i = 0; i < RRL_INSERTS; ++i) {
+		((struct sockaddr_in *) &addr)->sin_addr.s_addr = m[i].i;
+		rrl_item_t *b = rrl_hash(d->rrl, &addr, d->rq, d->zone, now, &lock);
+		rrl_unlock(d->rrl, lock);
+		if (b->netblk != m[i].x) {
+			d->passed = 0;
+		}
+	}
+	free(m);
+	return NULL;
+}
+
+static void rrl_hopscotch(struct runnable_data* rd)
+{
+	rd->passed = 1;
+	pthread_t thr[RRL_THREADS];
+	for (unsigned i = 0; i < RRL_THREADS; ++i) {
+		pthread_create(thr + i, NULL, &rrl_runnable, rd);
+	}
+	for (unsigned i = 0; i < RRL_THREADS; ++i) {
+		pthread_join(thr[i], NULL);
+	}
+}
+#endif
+
+int main(int argc, char *argv[])
+{
+	plan_lazy();
+
+	dnssec_crypto_init();
+
+	/* Prepare query. */
+	knot_pkt_t *query = knot_pkt_new(NULL, 512, NULL);
+	if (query == NULL) {
+		return KNOT_ERROR; /* Fatal */
+	}
+
+	knot_dname_t *qname = knot_dname_from_str_alloc("beef.");
+	int ret = knot_pkt_put_question(query, qname, KNOT_CLASS_IN, KNOT_RRTYPE_A);
+	knot_dname_free(qname, NULL);
+	if (ret != KNOT_EOK) {
+		knot_pkt_free(query);
+		return KNOT_ERROR; /* Fatal */
+	}
+
+	/* Prepare response */
+	uint8_t rbuf[65535];
+	size_t rlen = sizeof(rbuf);
+	memcpy(rbuf, query->wire, query->size);
+	knot_wire_flags_set_qr(rbuf);
+
+	rrl_req_t rq;
+	rq.wire = rbuf;
+	rq.len = rlen;
+	rq.query = query;
+	rq.flags = 0;
+
+	/* 1. create rrl table */
+	const uint32_t rate = 10;
+	rrl_table_t *rrl = rrl_create(RRL_SIZE, rate);
+	ok(rrl != NULL, "rrl: create");
+
+	/* 2. N unlimited requests. */
+	knot_dname_t *zone = knot_dname_from_str_alloc("rrl.");
+
+	struct sockaddr_storage addr;
+	struct sockaddr_storage addr6;
+	sockaddr_set(&addr, AF_INET, "1.2.3.4", 0);
+	sockaddr_set(&addr6, AF_INET6, "1122:3344:5566:7788::aabb", 0);
+	ret = 0;
+	for (unsigned i = 0; i < rate * RRL_CAPACITY; ++i) {
+		if (rrl_query(rrl, &addr, &rq, zone, NULL) != KNOT_EOK ||
+		    rrl_query(rrl, &addr6, &rq, zone, NULL) != KNOT_EOK) {
+			ret = KNOT_ELIMIT;
+			break;
+		}
+	}
+	is_int(0, ret, "rrl: unlimited IPv4/v6 requests");
+
+	/* 3. Endian-independent hash input buffer. */
+	uint8_t buf[RRL_CLSBLK_MAXLEN];
+	// CLS_LARGE + remote + dname wire.
+	uint8_t expectedv4[] = "\x10\x01\x02\x03\x00\x00\x00\x00\x00\x04""beef";
+	rrl_classify(buf, sizeof(buf), &addr, &rq, qname);
+	is_int(0, memcmp(buf, expectedv4, sizeof(expectedv4)), "rrl: IPv4 hash input buffer");
+	uint8_t expectedv6[] = "\x10\x11\x22\x33\x44\x55\x66\x77\x00\x04""beef";
+	rrl_classify(buf, sizeof(buf), &addr6, &rq, qname);
+	is_int(0, memcmp(buf, expectedv6, sizeof(expectedv6)), "rrl: IPv6 hash input buffer");
+
+#ifdef ENABLE_TIMED_TESTS
+	/* 5. limited request */
+	ret = rrl_query(rrl, &addr, &rq, zone, NULL);
+	is_int(KNOT_ELIMIT, ret, "rrl: throttled IPv4 request");
+
+	/* 6. limited IPv6 request */
+	ret = rrl_query(rrl, &addr6, &rq, zone, NULL);
+	is_int(KNOT_ELIMIT, ret, "rrl: throttled IPv6 request");
+
+	/* 8. hopscotch test */
+	struct runnable_data rd = {
+		1, rrl, &addr, &rq, zone
+	};
+	rrl_hopscotch(&rd);
+	ok(rd.passed, "rrl: hashtable is ~ consistent");
+#endif
+
+	knot_dname_free(zone, NULL);
+	knot_pkt_free(query);
+	rrl_destroy(rrl);
+	dnssec_crypto_cleanup();
+	return 0;
+}