-
- size = GNUNET_snprintf (name_buf, sizeof (name_buf), "sampler_el-%s-", buf);
- if (0 > size)
- LOG (GNUNET_ERROR_TYPE_WARNING, "Failed to create name_buf\n");
-
- if (NULL == (sampler_el->file_name = GNUNET_DISK_mktemp (name_buf)))
- LOG (GNUNET_ERROR_TYPE_WARNING, "Could not create file\n");
- #endif /* TO_FILE */
-
- sampler_el->last_client_request = GNUNET_TIME_UNIT_FOREVER_ABS;
-
- sampler_el->birth = GNUNET_TIME_absolute_get ();
- sampler_el->num_peers = 0;
- sampler_el->num_change = 0;
-}
-
-
-/**
- * (Re)Initialise given Sampler with random min-wise independent function.
- *
- * In this implementation this means choosing an auth_key for later use in
- * a hmac at random.
- *
- * @return a newly created RPS_SamplerElement which currently holds no id.
- */
- struct RPS_SamplerElement *
-RPS_sampler_elem_create (void)
-{
- struct RPS_SamplerElement *s;
-
- s = GNUNET_new (struct RPS_SamplerElement);
-
- RPS_sampler_elem_reinit (s);
-
- return s;
-}
-
-
-/**
- * Input an PeerID into the given sampler element.
- *
- * @param sampler the sampler the @a s_elem belongs to.
- * Needed to know the
- */
-static void
-RPS_sampler_elem_next (struct RPS_SamplerElement *s_elem,
- struct RPS_Sampler *sampler,
- const struct GNUNET_PeerIdentity *other)
-{
- struct GNUNET_HashCode other_hash;
-
- s_elem->num_peers++;
-
- #ifdef TO_FILE
- to_file (s_elem->file_name,
- "Got id %s",
- GNUNET_i2s_full (other));
- #endif /* TO_FILE */
-
- if (0 == GNUNET_CRYPTO_cmp_peer_identity (other, &(s_elem->peer_id)))
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG, " Got PeerID %s\n",
- GNUNET_i2s (other));
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Have already PeerID %s\n",
- GNUNET_i2s (&(s_elem->peer_id)));
- }
- else
- {
- GNUNET_CRYPTO_hmac(&s_elem->auth_key,
- other,
- sizeof(struct GNUNET_PeerIdentity),
- &other_hash);
-
- if (EMPTY == s_elem->is_empty)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Got PeerID %s; Simply accepting (was empty previously).\n",
- GNUNET_i2s(other));
- s_elem->peer_id = *other;
- s_elem->peer_id_hash = other_hash;
-
- s_elem->num_change++;
- }
- else if (0 > GNUNET_CRYPTO_hash_cmp (&other_hash, &s_elem->peer_id_hash))
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG, " Got PeerID %s\n",
- GNUNET_i2s (other));
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Discarding old PeerID %s\n",
- GNUNET_i2s (&s_elem->peer_id));
- s_elem->peer_id = *other;
- s_elem->peer_id_hash = other_hash;
-
- s_elem->num_change++;
- }
- else
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG, " Got PeerID %s\n",
- GNUNET_i2s (other));
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Keeping old PeerID %s\n",
- GNUNET_i2s (&s_elem->peer_id));
- }
- }
- s_elem->is_empty = NOT_EMPTY;
- #ifdef TO_FILE
- to_file (s_elem->file_name,
- "Now holding %s",
- GNUNET_i2s_full (&s_elem->peer_id));
- #endif /* TO_FILE */