[dpdk-dev] [PATCH v2 4/4] ipfrag: add unit test case

[Aaron Conole <aconole@redhat.com>]

Initial IP fragmentation unit test.

Signed-off-by: Aaron Conole <aconole@redhat.com>
---
 MAINTAINERS            |   1 +
 app/test/meson.build   |   2 +
 app/test/test_ipfrag.c | 276 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 279 insertions(+)
 create mode 100644 app/test/test_ipfrag.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 4800f6884a..c81f07ac9c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1230,6 +1230,7 @@ F: app/test/test_crc.c
 IP fragmentation & reassembly
 M: Konstantin Ananyev <konstantin.ananyev@intel.com>
 F: lib/librte_ip_frag/
+F: app/test/test_ipfrag.c
 F: doc/guides/prog_guide/ip_fragment_reassembly_lib.rst
 F: examples/ip_fragmentation/
 F: doc/guides/sample_app_ug/ip_frag.rst
diff --git a/app/test/meson.build b/app/test/meson.build
index 351d29cb65..c2b07fa62f 100644
--- a/app/test/meson.build
+++ b/app/test/meson.build
@@ -58,6 +58,7 @@ test_sources = files('commands.c',
 	'test_hash_perf.c',
 	'test_hash_readwrite_lf_perf.c',
 	'test_interrupts.c',
+        'test_ipfrag.c',
 	'test_ipsec.c',
 	'test_ipsec_sad.c',
 	'test_kni.c',
@@ -187,6 +188,7 @@ fast_tests = [
         ['flow_classify_autotest', false],
         ['hash_autotest', true],
         ['interrupt_autotest', true],
+        ['ipfrag_autotest', false],
         ['logs_autotest', true],
         ['lpm_autotest', true],
         ['lpm6_autotest', true],
diff --git a/app/test/test_ipfrag.c b/app/test/test_ipfrag.c
new file mode 100644
index 0000000000..4cdc1dcd54
--- /dev/null
+++ b/app/test/test_ipfrag.c
@@ -0,0 +1,276 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2020 Red Hat, Inc.
+ */
+
+#include <time.h>
+
+#include <rte_common.h>
+#include <rte_cycles.h>
+#include <rte_hexdump.h>
+#include <rte_ip.h>
+#include <rte_ip_frag.h>
+#include <rte_mbuf.h>
+#include <rte_memcpy.h>
+#include <rte_random.h>
+
+#include "test.h"
+
+#ifndef ARRAY_SIZE
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+#endif
+
+static struct rte_mempool *pkt_pool,
+			  *direct_pool,
+			  *indirect_pool;
+
+static int
+setup_buf_pool(void)
+{
+#define NUM_MBUFS (128)
+#define BURST 32
+
+	if (!pkt_pool)
+		pkt_pool = rte_pktmbuf_pool_create("FRAG_MBUF_POOL",
+						   NUM_MBUFS, BURST, 0,
+						   RTE_MBUF_DEFAULT_BUF_SIZE,
+						   SOCKET_ID_ANY);
+	if (pkt_pool == NULL) {
+		printf("%s: Error creating pkt mempool\n", __func__);
+		goto bad_setup;
+	}
+
+	if (!direct_pool)
+		direct_pool = rte_pktmbuf_pool_create("FRAG_D_MBUF_POOL",
+						      NUM_MBUFS, BURST, 0,
+						      RTE_MBUF_DEFAULT_BUF_SIZE,
+						      SOCKET_ID_ANY);
+	if (!direct_pool) {
+		printf("%s: Error creating direct mempool\n", __func__);
+		goto bad_setup;
+	}
+
+	if (!indirect_pool)
+		indirect_pool = rte_pktmbuf_pool_create("FRAG_I_MBUF_POOL",
+							NUM_MBUFS, BURST, 0,
+							0, SOCKET_ID_ANY);
+	if (!indirect_pool) {
+		printf("%s: Error creating indirect mempool\n", __func__);
+		goto bad_setup;
+	}
+
+	return 0;
+
+bad_setup:
+	if (pkt_pool)
+		rte_mempool_free(pkt_pool);
+
+	if (direct_pool)
+		rte_mempool_free(direct_pool);
+
+	return TEST_FAILED;
+}
+
+static int testsuite_setup(void)
+{
+	if (setup_buf_pool())
+		return TEST_FAILED;
+	return TEST_SUCCESS;
+}
+
+static void testsuite_teardown(void)
+{
+	if (pkt_pool)
+		rte_mempool_free(pkt_pool);
+
+	if (direct_pool)
+		rte_mempool_free(direct_pool);
+
+	if (indirect_pool)
+		rte_mempool_free(indirect_pool);
+
+	pkt_pool = NULL;
+}
+
+static int ut_setup(void)
+{
+	return TEST_SUCCESS;
+}
+
+static void ut_teardown(void)
+{
+}
+
+static int
+v4_allocate_packet_of(struct rte_mbuf *b, int fill, size_t s, int df,
+		      uint8_t ttl, uint8_t proto, uint16_t pktid)
+{
+	/* Create a packet, 2k bytes long */
+	b->data_off = 0;
+	char *data = rte_pktmbuf_mtod(b, char *);
+
+	memset(data, fill, sizeof(struct rte_ipv4_hdr) + s);
+
+	struct rte_ipv4_hdr *hdr = (struct rte_ipv4_hdr *)data;
+
+	hdr->version_ihl = 0x45; /* standard IP header... */
+	hdr->type_of_service = 0;
+	b->pkt_len = s + sizeof(struct rte_ipv4_hdr);
+	b->data_len = b->pkt_len;
+	hdr->total_length = htonl(b->pkt_len);
+	hdr->packet_id = htons(pktid);
+	hdr->fragment_offset = 0;
+	if (df)
+		hdr->fragment_offset = htons(0x4000);
+
+	if (!ttl)
+		ttl = 64; /* default to 64 */
+
+	if (!proto)
+		proto = 1; /* icmp */
+
+	hdr->time_to_live = ttl;
+	hdr->next_proto_id = proto;
+	hdr->hdr_checksum = 0;
+	hdr->src_addr = htonl(0x8080808);
+	hdr->dst_addr = htonl(0x8080404);
+
+	return 0;
+}
+
+static int
+v6_allocate_packet_of(struct rte_mbuf *b, int fill, size_t s, uint8_t ttl,
+		      uint8_t proto, uint16_t pktid)
+{
+	/* Create a packet, 2k bytes long */
+	b->data_off = 0;
+	char *data = rte_pktmbuf_mtod(b, char *);
+
+	memset(data, fill, sizeof(struct rte_ipv6_hdr) + s);
+
+	struct rte_ipv6_hdr *hdr = (struct rte_ipv6_hdr *)data;
+	b->pkt_len = s + sizeof(struct rte_ipv6_hdr);
+	b->data_len = b->pkt_len;
+
+	/* basic v6 header */
+	hdr->vtc_flow = htonl(0x60 << 24 | pktid);
+	hdr->payload_len = htons(b->pkt_len);
+	hdr->proto = proto;
+	hdr->hop_limits = ttl;
+
+	memset(hdr->src_addr, 0x08, sizeof(hdr->src_addr));
+	memset(hdr->dst_addr, 0x04, sizeof(hdr->src_addr));
+
+	return 0;
+}
+
+static inline void
+test_free_fragments(struct rte_mbuf *mb[], uint32_t num)
+{
+	uint32_t i;
+	for (i = 0; i < num; i++)
+		rte_pktmbuf_free(mb[i]);
+}
+
+static int
+test_ip_frag(void)
+{
+	int result = TEST_SUCCESS;
+
+	struct test_ip_frags {
+		int     ipv;
+		size_t  mtu_size;
+		size_t  pkt_size;
+		int     set_df;
+		int     ttl;
+		uint8_t proto;
+		int     pkt_id;
+		int     expected_frags;
+	} tests[] = {
+		     {4, 1280, 1400, 0, 64, IPPROTO_ICMP, -1, 2},
+		     {4, 1280, 1400, 0, 64, IPPROTO_ICMP,  0, 2},
+		     {4,  600, 1400, 0, 64, IPPROTO_ICMP, -1, 3},
+		     {4,    4, 1400, 0, 64, IPPROTO_ICMP, -1, -EINVAL},
+		     {4,  600, 1400, 1, 64, IPPROTO_ICMP, -1, -ENOTSUP},
+		     {4,  600, 1400, 0,  0, IPPROTO_ICMP, -1, 3},
+
+		     {6, 1280, 1400, 0, 64, IPPROTO_ICMP, -1, 2},
+		     {6, 1300, 1400, 0, 64, IPPROTO_ICMP, -1, 2},
+		     {6,    4, 1400, 0, 64, IPPROTO_ICMP, -1, -EINVAL},
+		     {6, 1300, 1400, 0,  0, IPPROTO_ICMP, -1, 2},
+		     {6, 1280, 1400, 0, 64, IPPROTO_FRAGMENT, -1, -ENOTSUP},
+	};
+
+	for (size_t i = 0; i < ARRAY_SIZE(tests); i++) {
+		int32_t len;
+		uint16_t pktid = tests[i].pkt_id;
+		struct rte_mbuf *pkts_out[BURST];
+		struct rte_mbuf *b = rte_pktmbuf_alloc(pkt_pool);
+
+		if (!b)
+			return TEST_FAILED; /* Serious error.. abort here */
+
+		if (tests[i].pkt_id == -1)
+			pktid = rte_rand_max(UINT16_MAX);
+
+		if (tests[i].ipv == 4) {
+			if (v4_allocate_packet_of(b, 0x41414141,
+						  tests[i].pkt_size,
+						  tests[i].set_df,
+						  tests[i].ttl,
+						  tests[i].proto,
+						  pktid))
+				result = TEST_FAILED;
+		} else if (tests[i].ipv == 6) {
+			if (v6_allocate_packet_of(b, 0x41414141,
+						  tests[i].pkt_size,
+						  tests[i].ttl,
+						  tests[i].proto,
+						  pktid))
+				result = TEST_FAILED;
+		}
+
+		if (tests[i].ipv == 4)
+			len = rte_ipv4_fragment_packet(b, pkts_out, BURST,
+						       tests[i].mtu_size,
+						       direct_pool,
+						       indirect_pool);
+		else
+			len = rte_ipv6_fragment_packet(b, pkts_out, BURST,
+						       tests[i].mtu_size,
+						       direct_pool,
+						       indirect_pool);
+
+		rte_pktmbuf_free(b);
+
+		if (len > 0)
+			test_free_fragments(pkts_out, len);
+
+		printf("%d: checking %d with %d\n", (int)i, len,
+		       (int)tests[i].expected_frags);
+		RTE_TEST_ASSERT_EQUAL(len, tests[i].expected_frags,
+				      "Failed case %u\n", (unsigned int)i);
+
+	}
+
+	return result;
+}
+
+static struct unit_test_suite ipfrag_testsuite  = {
+	.suite_name = "IP Frag Unit Test Suite",
+	.setup = testsuite_setup,
+	.teardown = testsuite_teardown,
+	.unit_test_cases = {
+		TEST_CASE_ST(ut_setup, ut_teardown,
+			     test_ip_frag),
+
+		TEST_CASES_END() /**< NULL terminate unit test array */
+	}
+};
+
+static int
+test_ipfrag(void)
+{
+	return unit_test_suite_runner(&ipfrag_testsuite);
+}
+
+REGISTER_TEST_COMMAND(ipfrag_autotest, test_ipfrag);
-- 
2.25.1