3 files changed, 132 insertions, 18 deletions

diff --git a/brandt.c b/brandt.c
index b175c3e..d71e7c9 100644
--- a/brandt.c
+++ b/brandt.c
@@ -50,6 +50,94 @@ BRANDT_init (struct GNUNET_CRYPTO_EccDlogContext *dlogctx)
 
 
 static void
+start_auction (void *arg)
+{
+        struct BRANDT_Auction *ad = (struct BRANDT_Auction *)arg;
+
+        /* \todo: broadcast start message to all participants */
+}
+
+
+struct BRANDT_Auction *
+BRANDT_new (BRANDT_CbBroadcast broadcast,
+            BRANDT_CbResult    result,
+            void               *auction_closure,
+            void               **auction_data,
+            size_t             *auction_data_len,
+            struct GNUNET_TIME_Absolute time_start,
+            struct GNUNET_TIME_Relative time_round,
+            uint16_t           num_prices,
+            uint16_t           m,
+            int                outcome_public)
+{
+        struct BRANDT_Auction *ret;
+
+        ret = GNUNET_new (struct BRANDT_Auction);
+
+        ret->time_start = time_start;
+        ret->time_round = time_round;
+
+        ret->k = num_prices;
+        ret->m = m;
+        ret->outcome_public = outcome_public;
+
+        /* we are the seller */
+        ret->seller_mode = 1;
+
+        /* interface with application */
+        ret->closure = auction_closure;
+        ret->bcast = broadcast;
+        ret->result = result;
+
+        ret->cur_round = msg_join;
+        ret->round_progress = gcry_mpi_new (256);
+
+        /* \todo: store returned task somewhere to cancel it on shutdown */
+        GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining (time_start),
+                                      &start_auction,
+                                      ret);
+
+        return ret;
+}
+
+
+struct BRANDT_Auction *
+BRANDT_join (BRANDT_CbBroadcast broadcast,
+             BRANDT_CbUnicast   unicast,
+             BRANDT_CbResult    result,
+             void               *auction_closure,
+             const void         *auction_data,
+             size_t             auction_data_len)
+{
+        struct BRANDT_Auction *ret;
+        struct BRANDT_DescrP *desc = (struct BRANDT_DescrP *)auction_data;
+
+        ret = GNUNET_new (struct BRANDT_Auction);
+
+        ret->time_start = GNUNET_TIME_absolute_ntoh(desc->time_start);
+        ret->time_round = GNUNET_TIME_relative_ntoh(desc->time_round);
+
+        ret->k = ntohs(desc->k);
+        ret->m = ntohs(desc->m);
+        ret->outcome_public = ntohs(desc->outcome_public);
+
+        /* we are the seller */
+        ret->seller_mode = 0;
+
+        /* interface with application */
+        ret->closure = auction_closure;
+        ret->bcast = broadcast;
+        ret->ucast = unicast;
+        ret->result = result;
+
+        ret->cur_round = msg_join;
+        ret->round_progress = gcry_mpi_new (256);
+
+        return ret;
+}
+
+
+static void
 advance_round (struct BRANDT_Auction *auction, enum auction_type atype, enum outcome_type outcome)
 {
         unsigned char *buf;
@@ -95,8 +183,8 @@ BRANDT_got_message (struct BRANDT_Auction *auction,
         enum outcome_type         outcome;
         enum rounds round = auction->cur_round;
 
-        atype = auction->desc->m > 0 ? auction_mPlusFirstPrice : auction_firstPrice;
-        outcome = auction->desc->outcome_public ? outcome_public : outcome_private;
+        atype = auction->m > 0 ? auction_mPlusFirstPrice : auction_firstPrice;
+        outcome = auction->outcome_public ? outcome_public : outcome_private;
 
         /** \todo: cache out of order messages */
 
diff --git a/brandt.h b/brandt.h
index ec3c959..318da4f 100644
--- a/brandt.h
+++ b/brandt.h
@@ -97,20 +97,21 @@ BRANDT_init (struct GNUNET_CRYPTO_EccDlogContext *dlogctx);
  * @param[in] unicast Pointer to the unicast callback function
  * @param[in] result Pointer to the result callback function
  * @param[in] auction_closure Closure pointer representing the auction. This
- * will not be touched by libbrandt. It is only passed to the callbacks.
- * @param[in] auction_data The auction information data a an opaque data
- * structure. It will be parsed and checked by BRANDT_join().
+ * will not be touched by libbrandt itself. It is only passed to the callbacks.
+ * @param[in] auction_data The auction information data published by the seller.
+ * This is an opaque data structure. It will be parsed and checked by
+ * BRANDT_join().
  * @param[in] auction_data_len The length in bytes of the @a auction_data
  * structure.
  * @return A pointer, which should only be remembered and passed to
  * libbrandt functions when the client needs to refer to this auction. This is a
- * black-box pointer, do NOT access/change it or the data it points to!
+ * black-box pointer, do NOT dereference/change it or the data it points to!
  */
 struct BRANDT_Auction *
 BRANDT_join (BRANDT_CbBroadcast broadcast,
              BRANDT_CbUnicast   unicast,
              BRANDT_CbResult    result,
-             const void         *auction_closure,
+             void               *auction_closure,
              const void         *auction_data,
              size_t             auction_data_len);
 /* \todo: where do I specify my bid? */
@@ -149,7 +150,7 @@ BRANDT_join (BRANDT_CbBroadcast broadcast,
  * winner and the seller.
  * @return A pointer, which should only be remembered and passed to
  * libbrandt functions when the client needs to refer to this auction. This is a
- * black-box pointer, do NOT access/change it or the data it points to!
+ * black-box pointer, do NOT dereference/change it or the data it points to!
  */
 struct BRANDT_Auction *
 BRANDT_new (BRANDT_CbBroadcast broadcast,
@@ -157,6 +158,8 @@ BRANDT_new (BRANDT_CbBroadcast broadcast,
             void               *auction_closure,
             void               **auction_data,
             size_t             *auction_data_len,
+            struct GNUNET_TIME_Absolute time_start,
+            struct GNUNET_TIME_Relative time_round,
             uint16_t           num_prices,
             uint16_t           m,
             int                outcome_public);
diff --git a/internals.h b/internals.h
index ce67934..acb4845 100644
--- a/internals.h
+++ b/internals.h
@@ -29,6 +29,7 @@
 
 
 enum rounds {
+        msg_join,
         msg_init,
         msg_bid,
         msg_outcome,
@@ -51,33 +52,55 @@ enum outcome_type {
 };
 
 
+GNUNET_NETWORK_STRUCT_BEGIN
+
 /**
  * This struct describes an auction and has to be followed by #description_len
  * bytes of arbitrary data where the description of the item to be sold is
- * stored.
+ * stored. All fields are stored in network byte order.
  *
  * \todo: align to a multiple of 64bit */
 struct BRANDT_DescrP {
+        /** Starting time of the auction. Bidders have to join the auction via
+         * BRANDT_join until this time */
+        struct GNUNET_TIME_AbsoluteNBO time_start;
+
+        /** The maximum duration the participants have to complete each round. */
+        struct GNUNET_TIME_RelativeNBO time_round;
+
         /** The length of the description in bytes directly following this struct */
-        uint32_t description_len;
+        uint32_t description_len GNUNET_PACKED;
+
+        /** The amount of possible prices */
+        uint16_t k GNUNET_PACKED;
 
         /** Auction type. 0 means first price Auction, >= 0 means M+1st price
          * auction with an amount of m items being sold. */
-        uint16_t m;
+        uint16_t m GNUNET_PACKED;
 
         /** Outcome type. 0 means private outcome, everything else means public
          * outcome. */
-        uint16_t outcome_public;
-
-        /** The amount of possible prices */
-        uint16_t price_range;
-
-        /** \todo: time */
+        uint16_t outcome_public GNUNET_PACKED;
 };
 
+GNUNET_NETWORK_STRUCT_END
+
 
 struct BRANDT_Auction {
-        struct BRANDT_DescrP *desc; /** pointer to the auction information */
+        /** Starting time of the auction. Bidders have to join the auction via
+         * BRANDT_join until this time */
+        struct GNUNET_TIME_Absolute time_start;
+
+        /** The maximum duration the participants have to complete each round. */
+        struct GNUNET_TIME_Relative time_round;
+
+        /** Auction type. 0 means first price Auction, >= 0 means M+1st price
+         * auction with an amount of m items being sold. */
+        uint16_t m;
+
+        /** Outcome type. 0 means private outcome, everything else means public
+         * outcome. */
+        uint16_t outcome_public;
 
         void *closure;              /** auction closure given by the user */