> 
> 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

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