Simple unit test that created pcapng file using API.
To run this test you need to have at least one device.
For example:
DPDK_TEST=pcapng_autotest ./build/app/test/dpdk-test -l 0-15 \
--no-huge -m 2048 --vdev=net_tap,iface=dummy
Signed-off-by: Stephen Hemminger <step...@networkplumber.org>
---
app/test/meson.build | 4 +
app/test/test_pcapng.c | 272 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 276 insertions(+)
create mode 100644 app/test/test_pcapng.c
diff --git a/app/test/meson.build b/app/test/meson.build
index a7611686adcb..8cf41021deb4 100644
--- a/app/test/meson.build
+++ b/app/test/meson.build
@@ -395,6 +395,10 @@ if dpdk_conf.has('RTE_NET_RING')
fast_tests += [['pdump_autotest', true]]
endif
+if dpdk_conf.has('RTE_PORT_PCAP')
+ test_sources += 'test_pcapng.c'
+endif
+
if dpdk_conf.has('RTE_LIB_POWER')
test_deps += 'power'
endif
diff --git a/app/test/test_pcapng.c b/app/test/test_pcapng.c
new file mode 100644
index 000000000000..df837ffe0d51
--- /dev/null
+++ b/app/test/test_pcapng.c
@@ -0,0 +1,272 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (c) 2021 Microsoft Corporation
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <rte_ethdev.h>
+#include <rte_ether.h>
+#include <rte_mbuf.h>
+#include <rte_mempool.h>
+#include <rte_net.h>
+#include <rte_pcapng.h>
+
+#include <pcap/pcap.h>
+
+#include "test.h"
+
+#define NUM_PACKETS 10
+#define DUMMY_MBUF_NUM 3
+
+static rte_pcapng_t *pcapng;
+static struct rte_mempool *mp;
+static const uint32_t pkt_len = 200;
+static uint16_t port_id;
+static char file_name[] = "/tmp/pcapng_test_XXXXXX.pcapng";
+
+/* first mbuf in the packet, should always be at offset 0 */
+struct dummy_mbuf {
+ struct rte_mbuf mb[DUMMY_MBUF_NUM];
+ uint8_t buf[DUMMY_MBUF_NUM][RTE_MBUF_DEFAULT_BUF_SIZE];
+};
+
+static void
+dummy_mbuf_prep(struct rte_mbuf *mb, uint8_t buf[], uint32_t buf_len,
+ uint32_t data_len)
+{
+ uint32_t i;
+ uint8_t *db;
+
+ mb->buf_addr = buf;
+ mb->buf_iova = (uintptr_t)buf;
+ mb->buf_len = buf_len;
+ rte_mbuf_refcnt_set(mb, 1);
+
+ /* set pool pointer to dummy value, test doesn't use it */
+ mb->pool = (void *)buf;
+
+ rte_pktmbuf_reset(mb);
+ db = (uint8_t *)rte_pktmbuf_append(mb, data_len);
+
+ for (i = 0; i != data_len; i++)
+ db[i] = i;
+}
+
+/* Make an IP packet consisting of chain of one packets */
+static void
+mbuf1_prepare(struct dummy_mbuf *dm, uint32_t plen)
+{
+ struct {
+ struct rte_ether_hdr eth;
+ struct rte_ipv4_hdr ip;
+ } pkt = {
+ .eth = {
+ .d_addr.addr_bytes = { 0xff, 0xff, 0xff, 0xff, 0xff,
0xff },
+ .ether_type = rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4),
+ },
+ .ip = {
+ .version_ihl = RTE_IPV4_VHL_DEF,
+ .total_length = rte_cpu_to_be_16(plen),
+ .time_to_live = IPDEFTTL,
+ .next_proto_id = IPPROTO_RAW,
+ .src_addr = rte_cpu_to_be_32(RTE_IPV4_LOOPBACK),
+ .dst_addr = rte_cpu_to_be_32(RTE_IPV4_BROADCAST),
+ }
+ };
+
+ memset(dm, 0, sizeof(*dm));
+ dummy_mbuf_prep(&dm->mb[0], dm->buf[0], sizeof(dm->buf[0]), plen);
+
+ rte_eth_random_addr(pkt.eth.s_addr.addr_bytes);
+ memcpy(rte_pktmbuf_mtod(dm->mb, void *), &pkt, RTE_MIN(sizeof(pkt),
plen));
+}
+
+static int
+test_setup(void)
+{
+ int tmp_fd;
+
+ port_id = rte_eth_find_next(0);
+ if (port_id >= RTE_MAX_ETHPORTS) {
+ fprintf(stderr, "No valid Ether port\n");
+ return -1;
+ }
+
+ tmp_fd = mkstemps(file_name, strlen(".pcapng"));
+ if (tmp_fd == -1) {
+ perror("mkstemps() failure");
+ return -1;
+ }
+ printf("pcapng: output file %s\n", file_name);
+
+ /* open a test capture file */
+ pcapng = rte_pcapng_fdopen(tmp_fd, NULL, NULL, "pcapng_test", NULL);
+ if (pcapng == NULL) {
+ fprintf(stderr, "rte_pcapng_fdopen failed\n");
+ close(tmp_fd);
+ return -1;
+ }
+
+
+ /* Make a pool for cloned packeets */
+ mp = rte_pktmbuf_pool_create_by_ops("pcapng_test_pool", NUM_PACKETS,
+ 0, 0,
+ rte_pcapng_mbuf_size(pkt_len),
+ SOCKET_ID_ANY, "ring_mp_sc");
+ if (mp == NULL) {
+ fprintf(stderr, "Cannot create mempool\n");
+ return -1;
+ }
+ return 0;
+
+}
+
+static int
+test_write_packets(void)
+{
+ struct rte_mbuf *orig;
+ struct rte_mbuf *clones[NUM_PACKETS] = { };
+ struct dummy_mbuf mbfs;
+ unsigned int i;
+ ssize_t len;
+
+ /* make a dummy packet */
+ mbuf1_prepare(&mbfs, pkt_len);
+
+ /* clone them */
+ orig = &mbfs.mb[0];
+ for (i = 0; i < NUM_PACKETS; i++) {
+ struct rte_mbuf *mc;
+
+ mc = rte_pcapng_copy(port_id, 0, orig, mp, pkt_len,
+ rte_get_tsc_cycles(), 0);
+ if (mc == NULL) {
+ fprintf(stderr, "Cannot copy packet\n");
+ return -1;
+ }
+ clones[i] = mc;
+ }
+
+ /* write it to capture file */
+ len = rte_pcapng_write_packets(pcapng, clones, NUM_PACKETS);
+
+ rte_pktmbuf_free_bulk(clones, NUM_PACKETS);
+
+ if (len <= 0) {
+ fprintf(stderr, "Write of packets failed\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+test_write_stats(void)
+{
+ ssize_t len;
+
+ /* write a statistics block */
+ len = rte_pcapng_write_stats(pcapng, port_id,
+ NULL, 0, 0,
+ NUM_PACKETS, 0);
+ if (len <= 0) {
+ fprintf(stderr, "Write of statistics failed\n");
+ return -1;
+ }
+ return 0;
+}
+
+static void
+pkt_print(u_char *user, const struct pcap_pkthdr *h,
+ const u_char *bytes)
+{
+ unsigned int *countp = (unsigned int *)user;
+ const struct rte_ether_hdr *eh;
+ struct tm *tm;
+ char tbuf[128], src[64], dst[64];
+
+ tm = localtime(&h->ts.tv_sec);
+ if (tm == NULL) {
+ perror("localtime");
+ return;
+ }
+
+ if (strftime(tbuf, sizeof(tbuf), "%X", tm) == 0) {
+ fprintf(stderr, "strftime returned 0!\n");
+ return;
+ }
+
+ eh = (const struct rte_ether_hdr *)bytes;
+ rte_ether_format_addr(dst, sizeof(dst), &eh->d_addr);
+ rte_ether_format_addr(src, sizeof(src), &eh->s_addr);
+ printf("%s.%06lu: %s -> %s type %x length %u\n",
+ tbuf, (unsigned long)h->ts.tv_usec,
+ src, dst, rte_be_to_cpu_16(eh->ether_type), h->len);
+
+ *countp += 1;
+}
+
+/*
+ * Open the resulting pcapng file with libpcap
+ * Would be better to use capinfos from wireshark
+ * but that creates an unwanted dependency.
+ */
+static int
+test_validate(void)
+{
+ char errbuf[PCAP_ERRBUF_SIZE];
+ unsigned int count = 0;
+ pcap_t *pcap;
+ int ret;
+
+ pcap = pcap_open_offline(file_name, errbuf);
+ if (pcap == NULL) {
+ fprintf(stderr, "pcap_open_offline('%s') failed: %s\n",
+ file_name, errbuf);
+ return -1;
+ }
+
+ ret = pcap_loop(pcap, 0, pkt_print, (u_char *)&count);
+ if (ret == 0)
+ printf("Saw %u packets\n", count);
+ else
+ fprintf(stderr, "pcap_dispatch: failed: %s\n",
+ pcap_geterr(pcap));
+ pcap_close(pcap);
+
+ return ret;
+}
+
+static void
+test_cleanup(void)
+{
+ if (mp)
+ rte_mempool_free(mp);
+
+ if (pcapng)
+ rte_pcapng_close(pcapng);
+
+}
+
+static struct
+unit_test_suite test_pcapng_suite = {
+ .setup = test_setup,
+ .teardown = test_cleanup,
+ .suite_name = "Test Pcapng Unit Test Suite",
+ .unit_test_cases = {
+ TEST_CASE(test_write_packets),
+ TEST_CASE(test_write_stats),
+ TEST_CASE(test_validate),
+ TEST_CASES_END()
+ }
+};
+
+static int
+test_pcapng(void)
+{
+ return unit_test_suite_runner(&test_pcapng_suite);
+}
+
+REGISTER_TEST_COMMAND(pcapng_autotest, test_pcapng);
--
2.30.2
