Esempio n. 1
0
static void
parse_dec_ttl(struct ofpbuf *b, char *arg)
{
    if (*arg == '\0') {
        parse_noargs_dec_ttl(b);
    } else {
        struct ofpact_cnt_ids *ids;
        char *cntr;

        ids = ofpact_put_DEC_TTL(b);
        ids->ofpact.compat = OFPUTIL_NXAST_DEC_TTL_CNT_IDS;
        for (cntr = strtok_r(arg, ", ", &arg); cntr != NULL;
             cntr = strtok_r(NULL, ", ", &arg)) {
            uint16_t id = atoi(cntr);

            ofpbuf_put(b, &id, sizeof id);
            ids = b->l2;
            ids->n_controllers++;
        }
        if (!ids->n_controllers) {
            ovs_fatal(0, "dec_ttl_cnt_ids: expected at least one controller "
                      "id.");
        }
        ofpact_update_len(b, &ids->ofpact);
    }
}
Esempio n. 2
0
static void
parse_note(const char *arg, struct ofpbuf *ofpacts)
{
    struct ofpact_note *note;

    note = ofpact_put_NOTE(ofpacts);
    while (*arg != '\0') {
        uint8_t byte;
        bool ok;

        if (*arg == '.') {
            arg++;
        }
        if (*arg == '\0') {
            break;
        }

        byte = hexits_value(arg, 2, &ok);
        if (!ok) {
            ovs_fatal(0, "bad hex digit in `note' argument");
        }
        ofpbuf_put(ofpacts, &byte, 1);

        note = ofpacts->l2;
        note->length++;

        arg += 2;
    }
    ofpact_update_len(ofpacts, &note->ofpact);
}
Esempio n. 3
0
File: learn.c Progetto: Milstein/ovs
/* Returns NULL if successful, otherwise a malloc()'d string describing the
 * error.  The caller is responsible for freeing the returned string. */
static char * WARN_UNUSED_RESULT
learn_parse__(char *orig, char *arg, struct ofpbuf *ofpacts)
{
    struct ofpact_learn *learn;
    struct match match;
    char *name, *value;

    learn = ofpact_put_LEARN(ofpacts);
    learn->idle_timeout = OFP_FLOW_PERMANENT;
    learn->hard_timeout = OFP_FLOW_PERMANENT;
    learn->priority = OFP_DEFAULT_PRIORITY;
    learn->table_id = 1;

    match_init_catchall(&match);
    while (ofputil_parse_key_value(&arg, &name, &value)) {
        if (!strcmp(name, "table")) {
            learn->table_id = atoi(value);
            if (learn->table_id == 255) {
                return xasprintf("%s: table id 255 not valid for `learn' "
                                 "action", orig);
            }
        } else if (!strcmp(name, "priority")) {
            learn->priority = atoi(value);
        } else if (!strcmp(name, "idle_timeout")) {
            learn->idle_timeout = atoi(value);
        } else if (!strcmp(name, "hard_timeout")) {
            learn->hard_timeout = atoi(value);
        } else if (!strcmp(name, "fin_idle_timeout")) {
            learn->fin_idle_timeout = atoi(value);
        } else if (!strcmp(name, "fin_hard_timeout")) {
            learn->fin_hard_timeout = atoi(value);
        } else if (!strcmp(name, "cookie")) {
            learn->cookie = strtoull(value, NULL, 0);
        } else {
            struct ofpact_learn_spec *spec;
            char *error;

            spec = ofpbuf_put_zeros(ofpacts, sizeof *spec);
            learn = ofpacts->frame;
            learn->n_specs++;

            error = learn_parse_spec(orig, name, value, spec);
            if (error) {
                return error;
            }

            /* Update 'match' to allow for satisfying destination
             * prerequisites. */
            if (spec->src_type == NX_LEARN_SRC_IMMEDIATE
                && spec->dst_type == NX_LEARN_DST_MATCH) {
                mf_write_subfield(&spec->dst, &spec->src_imm, &match);
            }
        }
    }
    ofpact_update_len(ofpacts, &learn->ofpact);

    return NULL;
}
Esempio n. 4
0
static void
parse_noargs_dec_ttl(struct ofpbuf *b)
{
    struct ofpact_cnt_ids *ids;
    uint16_t id = 0;

    ids = ofpact_put_DEC_TTL(b);
    ofpbuf_put(b, &id, sizeof id);
    ids = b->l2;
    ids->n_controllers++;
    ofpact_update_len(b, &ids->ofpact);
}
Esempio n. 5
0
/* Converts 'nal' into a "struct ofpact_learn" and appends that struct to
 * 'ofpacts'.  Returns 0 if successful, otherwise an OFPERR_*. */
enum ofperr
learn_from_openflow(const struct nx_action_learn *nal, struct ofpbuf *ofpacts)
{
    struct ofpact_learn *learn;
    const void *p, *end;

    if (nal->pad) {
        return OFPERR_OFPBAC_BAD_ARGUMENT;
    }

    learn = ofpact_put_LEARN(ofpacts);

    learn->idle_timeout = ntohs(nal->idle_timeout);
    learn->hard_timeout = ntohs(nal->hard_timeout);
    learn->priority = ntohs(nal->priority);
    learn->cookie = ntohll(nal->cookie);
    learn->flags = ntohs(nal->flags);
    learn->table_id = nal->table_id;
    learn->fin_idle_timeout = ntohs(nal->fin_idle_timeout);
    learn->fin_hard_timeout = ntohs(nal->fin_hard_timeout);

    if (learn->flags & ~OFPFF_SEND_FLOW_REM || learn->table_id == 0xff) {
        return OFPERR_OFPBAC_BAD_ARGUMENT;
    }

    end = (char *) nal + ntohs(nal->len);
    for (p = nal + 1; p != end; ) {
        struct ofpact_learn_spec *spec;
        uint16_t header = ntohs(get_be16(&p));

        if (!header) {
            break;
        }

        spec = ofpbuf_put_zeros(ofpacts, sizeof *spec);
        learn = ofpacts->l2;
        learn->n_specs++;

        spec->src_type = header & NX_LEARN_SRC_MASK;
        spec->dst_type = header & NX_LEARN_DST_MASK;
        spec->n_bits = header & NX_LEARN_N_BITS_MASK;

        /* Check for valid src and dst type combination. */
        if (spec->dst_type == NX_LEARN_DST_MATCH ||
                spec->dst_type == NX_LEARN_DST_LOAD ||
                (spec->dst_type == NX_LEARN_DST_OUTPUT &&
                 spec->src_type == NX_LEARN_SRC_FIELD)) {
            /* OK. */
        } else {
            return OFPERR_OFPBAC_BAD_ARGUMENT;
        }

        /* Check that the arguments don't overrun the end of the action. */
        if ((char *) end - (char *) p < learn_min_len(header)) {
            return OFPERR_OFPBAC_BAD_LEN;
        }

        /* Get the source. */
        if (spec->src_type == NX_LEARN_SRC_FIELD) {
            get_subfield(spec->n_bits, &p, &spec->src);
        } else {
            int p_bytes = 2 * DIV_ROUND_UP(spec->n_bits, 16);

            bitwise_copy(p, p_bytes, 0,
                         &spec->src_imm, sizeof spec->src_imm, 0,
                         spec->n_bits);
            p = (const uint8_t *) p + p_bytes;
        }

        /* Get the destination. */
        if (spec->dst_type == NX_LEARN_DST_MATCH ||
                spec->dst_type == NX_LEARN_DST_LOAD) {
            get_subfield(spec->n_bits, &p, &spec->dst);
        }
    }
    ofpact_update_len(ofpacts, &learn->ofpact);

    if (!is_all_zeros(p, (char *) end - (char *) p)) {
        return OFPERR_OFPBAC_BAD_ARGUMENT;
    }

    return 0;
}
Esempio n. 6
0
/* Helper for bundle_parse and bundle_parse_load.
 *
 * Returns NULL if successful, otherwise a malloc()'d string describing the
 * error.  The caller is responsible for freeing the returned string.*/
static char * WARN_UNUSED_RESULT
bundle_parse__(const char *s, char **save_ptr,
               const char *fields, const char *basis, const char *algorithm,
               const char *slave_type, const char *dst,
               const char *slave_delim, struct ofpbuf *ofpacts)
{
    struct ofpact_bundle *bundle;

    if (!slave_delim) {
        return xasprintf("%s: not enough arguments to bundle action", s);
    }

    if (strcasecmp(slave_delim, "slaves")) {
        return xasprintf("%s: missing slave delimiter, expected `slaves' "
                         "got `%s'", s, slave_delim);
    }

    bundle = ofpact_put_BUNDLE(ofpacts);

    for (;;) {
        ofp_port_t slave_port;
        char *slave;

        slave = strtok_r(NULL, ", []", save_ptr);
        if (!slave || bundle->n_slaves >= BUNDLE_MAX_SLAVES) {
            break;
        }

        if (!ofputil_port_from_string(slave, &slave_port)) {
            return xasprintf("%s: bad port number", slave);
        }
        ofpbuf_put(ofpacts, &slave_port, sizeof slave_port);

        bundle = ofpacts->l2;
        bundle->n_slaves++;
    }
    ofpact_update_len(ofpacts, &bundle->ofpact);

    bundle->basis = atoi(basis);

    if (!strcasecmp(fields, "eth_src")) {
        bundle->fields = NX_HASH_FIELDS_ETH_SRC;
    } else if (!strcasecmp(fields, "symmetric_l4")) {
        bundle->fields = NX_HASH_FIELDS_SYMMETRIC_L4;
    } else {
        return xasprintf("%s: unknown fields `%s'", s, fields);
    }

    if (!strcasecmp(algorithm, "active_backup")) {
        bundle->algorithm = NX_BD_ALG_ACTIVE_BACKUP;
    } else if (!strcasecmp(algorithm, "hrw")) {
        bundle->algorithm = NX_BD_ALG_HRW;
    } else {
        return xasprintf("%s: unknown algorithm `%s'", s, algorithm);
    }

    if (strcasecmp(slave_type, "ofport")) {
        return xasprintf("%s: unknown slave_type `%s'", s, slave_type);
    }

    if (dst) {
        char *error = mf_parse_subfield(&bundle->dst, dst);
        if (error) {
            return error;
        }
    }

    return NULL;
}
Esempio n. 7
0
/* Checks that 'nab' specifies a bundle action which is supported by this
 * bundle module.  Uses the 'max_ports' parameter to validate each port using
 * ofputil_check_output_port().  Returns 0 if 'nab' is supported, otherwise an
 * OFPERR_* error code. */
enum ofperr
bundle_from_openflow(const struct nx_action_bundle *nab,
                     struct ofpbuf *ofpacts)
{
    static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
    struct ofpact_bundle *bundle;
    uint16_t subtype;
    uint32_t slave_type;
    size_t slaves_size, i;
    enum ofperr error;

    bundle = ofpact_put_BUNDLE(ofpacts);

    subtype = ntohs(nab->subtype);
    bundle->n_slaves = ntohs(nab->n_slaves);
    bundle->basis = ntohs(nab->basis);
    bundle->fields = ntohs(nab->fields);
    bundle->algorithm = ntohs(nab->algorithm);
    slave_type = ntohl(nab->slave_type);
    slaves_size = ntohs(nab->len) - sizeof *nab;

    error = OFPERR_OFPBAC_BAD_ARGUMENT;
    if (!flow_hash_fields_valid(bundle->fields)) {
        VLOG_WARN_RL(&rl, "unsupported fields %d", (int) bundle->fields);
    } else if (bundle->n_slaves > BUNDLE_MAX_SLAVES) {
        VLOG_WARN_RL(&rl, "too may slaves");
    } else if (bundle->algorithm != NX_BD_ALG_HRW
               && bundle->algorithm != NX_BD_ALG_ACTIVE_BACKUP) {
        VLOG_WARN_RL(&rl, "unsupported algorithm %d", (int) bundle->algorithm);
    } else if (slave_type != NXM_OF_IN_PORT) {
        VLOG_WARN_RL(&rl, "unsupported slave type %"PRIu16, slave_type);
    } else {
        error = 0;
    }

    if (!is_all_zeros(nab->zero, sizeof nab->zero)) {
        VLOG_WARN_RL(&rl, "reserved field is nonzero");
        error = OFPERR_OFPBAC_BAD_ARGUMENT;
    }

    if (subtype == NXAST_BUNDLE && (nab->ofs_nbits || nab->dst)) {
        VLOG_WARN_RL(&rl, "bundle action has nonzero reserved fields");
        error = OFPERR_OFPBAC_BAD_ARGUMENT;
    }

    if (subtype == NXAST_BUNDLE_LOAD) {
        bundle->dst.field = mf_from_nxm_header(ntohl(nab->dst));
        bundle->dst.ofs = nxm_decode_ofs(nab->ofs_nbits);
        bundle->dst.n_bits = nxm_decode_n_bits(nab->ofs_nbits);

        if (bundle->dst.n_bits < 16) {
            VLOG_WARN_RL(&rl, "bundle_load action requires at least 16 bit "
                         "destination.");
            error = OFPERR_OFPBAC_BAD_ARGUMENT;
        }
    }

    if (slaves_size < bundle->n_slaves * sizeof(ovs_be16)) {
        VLOG_WARN_RL(&rl, "Nicira action %"PRIu16" only has %"PRIuSIZE" bytes "
                     "allocated for slaves.  %"PRIuSIZE" bytes are required for "
                     "%"PRIu16" slaves.", subtype, slaves_size,
                     bundle->n_slaves * sizeof(ovs_be16), bundle->n_slaves);
        error = OFPERR_OFPBAC_BAD_LEN;
    }

    for (i = 0; i < bundle->n_slaves; i++) {
        uint16_t ofp_port = ntohs(((ovs_be16 *)(nab + 1))[i]);
        ofpbuf_put(ofpacts, &ofp_port, sizeof ofp_port);
    }

    bundle = ofpacts->l2;
    ofpact_update_len(ofpacts, &bundle->ofpact);

    if (!error) {
        error = bundle_check(bundle, OFPP_MAX, NULL);
    }
    return error;
}
Esempio n. 8
0
File: bundle.c Progetto: enukane/ovs
/* Helper for bundle_parse and bundle_parse_load. */
static void
bundle_parse__(const char *s, char **save_ptr,
               const char *fields, const char *basis, const char *algorithm,
               const char *slave_type, const char *dst,
               const char *slave_delim, struct ofpbuf *ofpacts)
{
    struct ofpact_bundle *bundle;

    if (!slave_delim) {
        ovs_fatal(0, "%s: not enough arguments to bundle action", s);
    }

    if (strcasecmp(slave_delim, "slaves")) {
        ovs_fatal(0, "%s: missing slave delimiter, expected `slaves' got `%s'",
                   s, slave_delim);
    }

    bundle = ofpact_put_BUNDLE(ofpacts);

    for (;;) {
        uint16_t slave_port;
        char *slave;

        slave = strtok_r(NULL, ", [", save_ptr);
        if (!slave || bundle->n_slaves >= BUNDLE_MAX_SLAVES) {
            break;
        }

        slave_port = atoi(slave);
        ofpbuf_put(ofpacts, &slave_port, sizeof slave_port);

        bundle = ofpacts->l2;
        bundle->n_slaves++;
    }
    ofpact_update_len(ofpacts, &bundle->ofpact);

    bundle->basis = atoi(basis);

    if (!strcasecmp(fields, "eth_src")) {
        bundle->fields = NX_HASH_FIELDS_ETH_SRC;
    } else if (!strcasecmp(fields, "symmetric_l4")) {
        bundle->fields = NX_HASH_FIELDS_SYMMETRIC_L4;
    } else {
        ovs_fatal(0, "%s: unknown fields `%s'", s, fields);
    }

    if (!strcasecmp(algorithm, "active_backup")) {
        bundle->algorithm = NX_BD_ALG_ACTIVE_BACKUP;
    } else if (!strcasecmp(algorithm, "hrw")) {
        bundle->algorithm = NX_BD_ALG_HRW;
    } else {
        ovs_fatal(0, "%s: unknown algorithm `%s'", s, algorithm);
    }

    if (strcasecmp(slave_type, "ofport")) {
        ovs_fatal(0, "%s: unknown slave_type `%s'", s, slave_type);
    }

    if (dst) {
        mf_parse_subfield(&bundle->dst, dst);
    }
}