private firstprice auction working in test_brandt
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Markus Teich
parent
14546eccb2
commit
de5ea20b55
125
brandt.c
125
brandt.c
@ -78,8 +78,8 @@ BRANDT_bidder_start (struct BRANDT_Auction *auction,
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}
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weprintf("broadcasting msg_init %p from bidder %d", buf, i);
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if (0 == auction->bcast (auction->closure, buf, buflen))
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gcry_mpi_set_bit (auction->round_progress, auction->i);
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auction->bcast (auction->closure, buf, buflen);
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gcry_mpi_set_bit (auction->round_progress, auction->i);
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free (buf);
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}
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@ -293,88 +293,89 @@ BRANDT_destroy (struct BRANDT_Auction *auction)
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}
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static void
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report_outcome (struct BRANDT_Auction *ad,
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enum auction_type atype,
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enum outcome_type outcome)
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{
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struct BRANDT_Result *res;
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uint16_t reslen = 0;
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if (!handler_res[atype][outcome] ||
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!(res = handler_res[atype][outcome] (ad, &reslen)))
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ad->result (ad->closure, NULL, 0);
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else
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ad->result (ad->closure, res, reslen);
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}
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static void
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advance_round (struct BRANDT_Auction *ad,
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enum auction_type atype,
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enum outcome_type outcome)
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{
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struct BRANDT_Result *res;
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uint16_t reslen = 0;
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unsigned char *buf;
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size_t buflen;
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/* if we did not got the current round message from all participants, don't
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* advance to the next round yet. Early return, since we have to wait for
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* the other participants messages. In the msg_decrypt round as a bidder we
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* only need the one message from the seller. */
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for (uint16_t i = 0; i < ad->n; i++)
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if (!gcry_mpi_test_bit (ad->round_progress, i) &&
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(ad->seller_mode || msg_decrypt != ad->cur_round))
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return;
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/* Do not advance to the next round if we are the seller and got all
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* msg_decrypt messages from the bidders. We need to broadcast our combined
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* msg_decrypt message back to the sellers first */
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if (!ad->seller_mode || msg_decrypt != ad->cur_round)
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if (!ad->seller_mode && msg_decrypt == ad->cur_round)
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{
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/* clear old round progress and advance to next one */
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gcry_mpi_clear_highbit (ad->round_progress, 0);
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ad->cur_round++;
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/* prepare next round. */
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if (handler_prep[atype][outcome][ad->cur_round])
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handler_prep[atype][outcome][ad->cur_round] (ad);
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/** \todo: setup round timeout trigger */
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if (ad->seller_mode)
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{
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}
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/* we are a bidder and successfully parsed the msg_decrypt from the
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* seller => we can determine the auction result */
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report_outcome (ad, atype, outcome);
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return;
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}
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/* send next message if we are not done yet */
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if ((!ad->seller_mode && msg_last > ad->cur_round) ||
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(ad->seller_mode && msg_decrypt == ad->cur_round &&
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gcry_mpi_test_bit (ad->round_progress, 0)))
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/* only continue if the round is complete */
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for (uint16_t i = 0; i < ad->n; i++)
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if (!gcry_mpi_test_bit (ad->round_progress, i))
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return;
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if (ad->seller_mode && msg_decrypt == ad->cur_round)
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{
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/* all bidders msg_decrypt received, broadcast combined msg_decrypt */
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if (!handler_out[atype][outcome][ad->cur_round] ||
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!(buf = handler_out[atype][outcome][ad->cur_round](ad, &buflen)))
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{
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weprintf ("failed to create message %d buffer", ad->cur_round);
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weprintf ("failed to create msg %d buffer as seller",
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ad->cur_round);
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return;
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}
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ad->bcast (ad->closure, buf, buflen);
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/* msg_decrypt unicast to seller or broadcast from seller.
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* All other messages are broadcasted */
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if (msg_decrypt == ad->cur_round && !ad->seller_mode)
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{
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if (0 == ad->ucast (ad->closure, buf, buflen))
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gcry_mpi_set_bit (ad->round_progress, ad->i);
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}
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else
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{
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if (!ad->seller_mode && 0 == ad->bcast (ad->closure, buf, buflen))
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gcry_mpi_set_bit (ad->round_progress, ad->i);
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}
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/* now we are done as seller and can determine the outcome */
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report_outcome (ad, atype, outcome);
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return;
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}
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if (msg_last == ad->cur_round ||
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(msg_decrypt == ad->cur_round && ad->seller_mode &&
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gcry_mpi_test_bit (ad->round_progress, 0)))
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/* round complete, advance to next one */
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gcry_mpi_clear_highbit (ad->round_progress, 0);
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ad->cur_round++;
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/* prepare next round. */
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if (handler_prep[atype][outcome][ad->cur_round])
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handler_prep[atype][outcome][ad->cur_round] (ad);
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if (ad->seller_mode)
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{
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/* done with all rounds, determine outcome here */
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if (!handler_res[atype][outcome] ||
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!(res = handler_res[atype][outcome] (ad, &reslen)))
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{
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weprintf ("failed to determine result");
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/** \todo: call result with null pointer here? */
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return;
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}
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ad->result (ad->closure, res, reslen);
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/* seller still needs to broadcast the decryption to all bidders */
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if (!ad->seller_mode)
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return;
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/** \todo: setup round timeout trigger */
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/* seller does not send regular messages */
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return;
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}
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/* create next message buffer */
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if (!handler_out[atype][outcome][ad->cur_round] ||
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!(buf = handler_out[atype][outcome][ad->cur_round](ad, &buflen)))
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{
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weprintf ("failed to create msg %d buffer as bidder", ad->cur_round);
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return;
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}
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/* msg_decrypt unicast to seller. All other messages are broadcasted */
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if (msg_decrypt == ad->cur_round)
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ad->ucast (ad->closure, buf, buflen);
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else
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ad->bcast (ad->closure, buf, buflen);
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gcry_mpi_set_bit (ad->round_progress, ad->i);
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}
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@ -133,6 +133,17 @@ cb_result (void *auction_closure,
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struct BRANDT_Result results[],
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uint16_t results_len)
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{
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uint16_t *s = (uint16_t *)auction_closure;
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if (0 == results_len)
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weprintf ("result determined by agent %d: none", *s);
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for (uint16_t i = 0; i < results_len; i++)
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weprintf ("result determined by agent %d: bidder %d got status %d with price %d",
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*s,
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results[i].bidder,
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results[i].status,
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results[i].price);
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}
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