Add some functional tests for the Classic BPF to DPDK BPF converter.
Signed-off-by: Stephen Hemminger <step...@networkplumber.org>
---
app/test/test_bpf.c | 148 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 148 insertions(+)
diff --git a/app/test/test_bpf.c b/app/test/test_bpf.c
index 527c06b80708..68b09067bf56 100644
--- a/app/test/test_bpf.c
+++ b/app/test/test_bpf.c
@@ -10,6 +10,7 @@
#include <rte_memory.h>
#include <rte_debug.h>
#include <rte_hexdump.h>
+#include <rte_malloc.h>
#include <rte_random.h>
#include <rte_byteorder.h>
#include <rte_errno.h>
@@ -3233,3 +3234,150 @@ test_bpf(void)
}
REGISTER_TEST_COMMAND(bpf_autotest, test_bpf);
+
+#ifdef RTE_PORT_PCAP
+#include <pcap/pcap.h>
+
+static void
+test_bpf_dump(struct bpf_program *cbf, const struct rte_bpf_prm *prm)
+{
+ printf("cBPF program (%u insns)\n", cbf->bf_len);
+ bpf_dump(cbf, 1);
+
+ printf("\neBPF program (%u insns)\n", prm->nb_ins);
+ rte_bpf_dump(stdout, prm->ins, prm->nb_ins);
+}
+
+static int
+test_bpf_match(pcap_t *pcap, const char *str, bool expected)
+{
+ struct bpf_program fcode;
+ struct rte_bpf_prm *prm = NULL;
+ struct rte_bpf *bpf = NULL;
+ uint8_t tbuf[sizeof(struct dummy_mbuf)];
+ int ret = -1;
+ uint64_t rc;
+
+ if (pcap_compile(pcap, &fcode, str, 1, PCAP_NETMASK_UNKNOWN)) {
+ printf("%s@%d: pcap_compile(\"%s\") failed: %s;\n",
+ __func__, __LINE__, str, pcap_geterr(pcap));
+ return -1;
+ }
+
+ prm = rte_bpf_convert(&fcode);
+ if (prm == NULL) {
+ printf("%s@%d: bpf_convert('%s') failed,, error=%d(%s);\n",
+ __func__, __LINE__, str, rte_errno, strerror(rte_errno));
+ goto error;
+ }
+
+ bpf = rte_bpf_load(prm);
+ if (bpf == NULL) {
+ printf("%s@%d: failed to load bpf code, error=%d(%s);\n",
+ __func__, __LINE__, rte_errno, strerror(rte_errno));
+ goto error;
+ }
+
+ test_ld_mbuf1_prepare(tbuf);
+ rc = rte_bpf_exec(bpf, tbuf);
+ if ((rc == 0) == expected)
+ ret = 0;
+ else
+ printf("%s@%d: failed match: expect %s 0 got %"PRIu64"\n",
+ __func__, __LINE__, expected ? "==" : "<>", rc);
+error:
+ if (bpf)
+ rte_bpf_destroy(bpf);
+ rte_free(prm);
+ pcap_freecode(&fcode);
+ return ret;
+}
+
+/* Basic sanity test can we match a IP packet */
+static int
+test_bpf_filter_sanity(pcap_t *pcap)
+{
+ int ret;
+
+ ret = test_bpf_match(pcap, "ip", true);
+ ret |= test_bpf_match(pcap, "not ip", false);
+
+ return ret;
+}
+
+/* Some sample pcap filter strings from tcpdump man page */
+static const char *sample_filters[] = {
+ "host 192.168.1.100",
+ "src net 10",
+ "not stp",
+ "len = 128",
+ "ip host 1.1.1.1 and not 1.1.1.2",
+ "ip and not net 127.0.0.1",
+ "tcp[tcpflags] & (tcp-syn|tcp-fin) != 0 and not src and dst net
127.0.0.1",
+ "ether[0] & 1 = 0 and ip[16] >= 224",
+ "icmp[icmptype] != icmp-echo and icmp[icmptype] != icmp-echoreply",
+};
+
+static int
+test_bpf_filter(pcap_t *pcap, const char *s)
+{
+ struct bpf_program fcode;
+ struct rte_bpf_prm *prm = NULL;
+ struct rte_bpf *bpf = NULL;
+
+ if (pcap_compile(pcap, &fcode, s, 1, PCAP_NETMASK_UNKNOWN)) {
+ printf("%s@%d: pcap_compile('%s') failed: %s;\n",
+ __func__, __LINE__, s, pcap_geterr(pcap));
+ return -1;
+ }
+
+ prm = rte_bpf_convert(&fcode);
+ if (prm == NULL) {
+ printf("%s@%d: bpf_convert('%s') failed,, error=%d(%s);\n",
+ __func__, __LINE__, s, rte_errno, strerror(rte_errno));
+ goto error;
+ }
+
+ bpf = rte_bpf_load(prm);
+ if (bpf == NULL) {
+ printf("%s@%d: failed to load bpf code, error=%d(%s);\n",
+ __func__, __LINE__, rte_errno, strerror(rte_errno));
+ goto error;
+ }
+
+error:
+ if (bpf)
+ rte_bpf_destroy(bpf);
+ else {
+ printf("%s \"%s\"\n", __func__, s);
+ test_bpf_dump(&fcode, prm);
+ }
+
+ rte_free(prm);
+ pcap_freecode(&fcode);
+ return (bpf == NULL) ? -1 : 0;
+}
+
+static int
+test_bpf_convert(void)
+{
+ unsigned int i;
+ pcap_t *pcap;
+ int rc;
+
+ pcap = pcap_open_dead(DLT_EN10MB, 262144);
+ if (!pcap) {
+ printf("pcap_open_dead failed\n");
+ return -1;
+ }
+
+ rc = test_bpf_filter_sanity(pcap);
+ for (i = 0; i < RTE_DIM(sample_filters); i++) {
+ rc |= test_bpf_filter(pcap,sample_filters[i]);
+ }
+ pcap_close(pcap);
+ return rc;
+}
+
+REGISTER_TEST_COMMAND(bpf_convert_autotest, test_bpf_convert);
+#endif /* RTE_PORT_PCAP */
--
2.30.2
