>
> 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 | 173 ++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 173 insertions(+)
>
> diff --git a/app/test/test_bpf.c b/app/test/test_bpf.c
> index 527c06b80708..1b5a178241d8 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 +3234,175 @@ 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
> + * https://wiki.wireshark.org/CaptureFilters
> + */
> +static const char * const sample_filters[] = {
> + "host 172.18.5.4",
> + "net 192.168.0.0/24",
> + "src net 192.168.0.0/24",
> + "src net 192.168.0.0 mask 255.255.255.0",
> + "dst net 192.168.0.0/24",
> + "dst net 192.168.0.0 mask 255.255.255.0",
> + "port 53",
> + "host www.example.com and not (port 80 or port 25)",
> + "host www.example.com and not port 80 and not port 25",
> + "port not 53 and not arp",
> + "(tcp[0:2] > 1500 and tcp[0:2] < 1550) or (tcp[2:2] > 1500 and tcp[2:2]
> < 1550)",
> + "ether proto 0x888e",
> + "ether[0] & 1 = 0 and ip[16] >= 224",
> + "icmp[icmptype] != icmp-echo and icmp[icmptype] != icmp-echoreply",
> + "tcp[tcpflags] & (tcp-syn|tcp-fin) != 0 and not src and dst net
> 127.0.0.1",
> + "not ether dst 01:80:c2:00:00:0e",
> + "not broadcast and not multicast",
> + "dst host ff02::1",
> + "port 80 and tcp[((tcp[12:1] & 0xf0) >> 2):4] = 0x47455420",
> + /* Worms */
> + "dst port 135 and tcp port 135 and ip[2:2]==48",
> + "icmp[icmptype]==icmp-echo and ip[2:2]==92 and icmp[8:4]==0xAAAAAAAA",
> + "dst port 135 or dst port 445 or dst port 1433"
> + " and tcp[tcpflags] & (tcp-syn) != 0"
> + " and tcp[tcpflags] & (tcp-ack) = 0 and src net 192.168.0.0/24",
> + "tcp src port 443 and (tcp[((tcp[12] & 0xF0) >> 4 ) * 4] = 0x18)"
> + " and (tcp[((tcp[12] & 0xF0) >> 4 ) * 4 + 1] = 0x03)"
> + " and (tcp[((tcp[12] & 0xF0) >> 4 ) * 4 + 2] < 0x04)"
> + " and ((ip[2:2] - 4 * (ip[0] & 0x0F) - 4 * ((tcp[12] & 0xF0) >> 4) >
> 69))",
> + /* Other */
> + "len = 128",
> +};
> +
> +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 */
> --
Acked-by: Konstantin Ananyev <konstantin.anan...@intel.com>
> 2.30.2
