ovs/tests/oss-fuzz/odp_target.c

#include <config.h>
#include "fuzzer.h"
#undef NDEBUG
#include "odp-util.h"
#include <stdio.h>
#include "openvswitch/dynamic-string.h"
#include "flow.h"
#include "openvswitch/match.h"
#include "openvswitch/ofpbuf.h"
#include "util.h"
#include "openvswitch/ofp-flow.h"
#include "openvswitch/vlog.h"

static int
parse_keys(bool wc_keys, const char *in)
{
    int exit_code = 0;

    enum odp_key_fitness fitness;
    struct ofpbuf odp_key;
    struct ofpbuf odp_mask;
    struct flow flow;
    struct ds out;
    int error;

    /* Convert string to OVS DP key. */
    ofpbuf_init(&odp_key, 0);
    ofpbuf_init(&odp_mask, 0);
    error = odp_flow_from_string(in, NULL,
                                 &odp_key, &odp_mask, NULL);
    if (error) {
        printf("odp_flow_from_string: error\n");
        goto next;
    }

    if (!wc_keys) {
        struct odp_flow_key_parms odp_parms = {
            .flow = &flow,
            .support = {
                .recirc = true,
                .ct_state = true,
                .ct_zone = true,
                .ct_mark = true,
                .ct_label = true,
                .max_vlan_headers = SIZE_MAX,
            },
        };

        /* Convert odp_key to flow. */
        fitness = odp_flow_key_to_flow(odp_key.data, odp_key.size,
                                       &flow, NULL);
        switch (fitness) {
            case ODP_FIT_PERFECT:
                break;

            case ODP_FIT_TOO_LITTLE:
                printf("ODP_FIT_TOO_LITTLE: ");
                break;

            case ODP_FIT_TOO_MUCH:
                printf("ODP_FIT_TOO_MUCH: ");
                break;

            case ODP_FIT_ERROR:
                printf("odp_flow_key_to_flow: error\n");
                goto next;
        }
        /* Convert cls_rule back to odp_key. */
        ofpbuf_uninit(&odp_key);
        ofpbuf_init(&odp_key, 0);
        odp_flow_key_from_flow(&odp_parms, &odp_key);

        if (odp_key.size > ODPUTIL_FLOW_KEY_BYTES) {
            printf ("too long: %"PRIu32" > %d\n",
                    odp_key.size, ODPUTIL_FLOW_KEY_BYTES);
            exit_code = 1;
        }
    }

    /* Convert odp_key to string. */
    ds_init(&out);
    if (wc_keys) {
        odp_flow_format(odp_key.data, odp_key.size,
                        odp_mask.data, odp_mask.size, NULL, &out, false,
                        false);
    } else {
        odp_flow_key_format(odp_key.data, odp_key.size, &out);
    }
    puts(ds_cstr(&out));
    ds_destroy(&out);

next:
    ofpbuf_uninit(&odp_key);
    ofpbuf_uninit(&odp_mask);

    return exit_code;
}

static int
parse_actions(const char *in)
{
    struct ofpbuf odp_actions;
    struct ds out;
    int error;

    /* Convert string to OVS DP actions. */
    ofpbuf_init(&odp_actions, 0);
    error = odp_actions_from_string(in, NULL, &odp_actions);
    if (error) {
        printf("odp_actions_from_string: error\n");
        goto next;
    }

    /* Convert odp_actions back to string. */
    ds_init(&out);
    format_odp_actions(&out, odp_actions.data, odp_actions.size, NULL);
    puts(ds_cstr(&out));
    ds_destroy(&out);

next:
    ofpbuf_uninit(&odp_actions);
    return 0;
}

int
LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
    /* Bail out if we cannot construct at least a 1 char string. */
    const char *input = (const char *) data;
    if (size < 2 || input[size - 1] != '\0' || strchr(input, '\n') ||
        strlen(input) != size - 1) {
        return 0;
    }

    /* Disable logging to avoid write to disk. */
    static bool isInit = false;
    if (!isInit) {
        vlog_set_verbosity("off");
        isInit = true;
    }

    /* Parse keys and wc keys. */
    parse_keys(false, input);
    parse_keys(true, input);

    /* Parse actions. */
    parse_actions(input);

    return 0;
}