Function ap_proxy_share_balancer

modules/proxy/proxy_util.c:1285–1330

* Create an already defined balancer and free up memory. */

 * Create an already defined balancer and free up memory.
 */
PROXY_DECLARE(apr_status_t) ap_proxy_share_balancer(proxy_balancer *balancer,
                                                    proxy_balancer_shared *shm,
                                                    int i)
{
    apr_status_t rv = APR_SUCCESS;
    proxy_balancer_method *lbmethod;
    char *action = "copying";
    if (!shm || !balancer->s)
        return APR_EINVAL;

    if ((balancer->s->hash.def != shm->hash.def) ||
        (balancer->s->hash.fnv != shm->hash.fnv)) {
        memcpy(shm, balancer->s, sizeof(proxy_balancer_shared));
        if (balancer->s->was_malloced)
            free(balancer->s);
    } else {
        action = "re-using";
    }
    balancer->s = shm;
    balancer->s->index = i;
    ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(02337)
                 "%s shm[%d] (0x%pp) for %s", action, i, (void *)shm,
                 balancer->s->name);
    /* the below should always succeed */
    lbmethod = ap_lookup_provider(PROXY_LBMETHOD, balancer->s->lbpname, "0");
    if (lbmethod) {
        balancer->lbmethod = lbmethod;
        balancer->lbmethod_set = 1;
    } else {
        ap_log_error(APLOG_MARK, APLOG_CRIT, 0, ap_server_conf, APLOGNO(02432)
                     "Cannot find LB Method: %s", balancer->s->lbpname);
        return APR_EINVAL;
    }
    if (*balancer->s->nonce == PROXY_UNSET_NONCE) {
        char nonce[APR_UUID_FORMATTED_LENGTH + 1];
        apr_uuid_t uuid;

        /* Generate a pseudo-UUID from the PRNG to use as a nonce for
         * the lifetime of the process. uuid.data is a char array so
         * this is an adequate substitute for apr_uuid_get(). */
        ap_random_insecure_bytes(uuid.data, sizeof uuid.data);
        apr_uuid_format(nonce, &uuid);
        rv = PROXY_STRNCPY(balancer->s->nonce, nonce);
    }
    return rv;
}

PROXY_DECLARE(apr_status_t) ap_proxy_initialize_balancer(proxy_balancer *balancer, server_rec *s, apr_pool_t *p)
{