From 25321ed0f5fa06f7c25d9e571c27c8dbeb5ffb96 Mon Sep 17 00:00:00 2001
From: Markus Teich <markus.teich@stusta.mhn.de>
Date: Wed, 17 Aug 2016 23:53:49 +0200
Subject: [PATCH] get auctions rolling

---
 brandt.c    | 17 +++++++++++++++--
 brandt.h    | 22 +++++++++++++++++-----
 internals.h |  7 +++++++
 3 files changed, 39 insertions(+), 7 deletions(-)

diff --git a/brandt.c b/brandt.c
index e90ec2f..edfca62 100644
--- a/brandt.c
+++ b/brandt.c
@@ -50,12 +50,25 @@ BRANDT_init (struct GNUNET_CRYPTO_EccDlogContext *dlogctx)
 }
 
 
+BRANDT_start (struct BRANDT_Auction *auction,
+              uint16_t n){
+	GNUNET_assert (n > 0);
+	auction->n = n;
+	/** \todo: send first message */
+}
+
+
 static void
 start_auction (void *arg)
 {
-//	struct BRANDT_Auction *ad = (struct BRANDT_Auction *)arg;
+	struct BRANDT_Auction *ad = (struct BRANDT_Auction *)arg;
 
-	/* \todo: broadcast start message to all participants */
+	if (0 == (ad->n = ad->start (ad->closure)))
+	{
+		weprintf ("no bidders registered for auction");
+		ad->result (ad->closure, -1, result_no_bidders, 0);
+		return;
+	}
 }
 
 
diff --git a/brandt.h b/brandt.h
index 1903301..385d67b 100644
--- a/brandt.h
+++ b/brandt.h
@@ -92,15 +92,16 @@ typedef int
  * auction. This is the Pointer given to BRANDT_join() / BRANDT_new().
  * @param[in] bidder_id The numeric Id of the bidder this report refers to.
  * @param[in] status 1 if the user @a bidder_id has won the auction, 0 if he has
- * lost, -1 if erroneous behaviour was detected.
+ * lost, negative if erroneous behaviour was detected. Check the result_code
+ * enum for more information.
  * @param[in] price The price, the winner has to pay or 0 if the auction result
  * is private and the user did not win.
  */
 typedef void
-(*BRANDT_CbResult)(void         *auction_closure,
-                   unsigned int bidder_id,
-                   int          status,
-                   uint16_t     price);
+(*BRANDT_CbResult)(void     *auction_closure,
+                   int32_t  bidder_id,
+                   int      status,
+                   uint16_t price);
 
 
 void
@@ -214,6 +215,17 @@ BRANDT_new (BRANDT_CbResult             result,
 
 
 /**
+ * This function must be called when bidding after receipt of the start
+ * notification.
+ *
+ * @param[in] auction The pointer returned by BRANDT_join().
+ * @param[in] n The amount of bidders (from the start announcement message).
+   void
+   BRANDT_start (struct BRANDT_Auction *auction,
+              uint16_t              n);
+
+
+   /**
  * Clean up this auction on shutdown.
  *
  * @param[in] auction The pointer returned by BRANDT_join() or BRANDT_new().
diff --git a/internals.h b/internals.h
index a1c939a..c478f4f 100644
--- a/internals.h
+++ b/internals.h
@@ -51,6 +51,13 @@ enum outcome_type {
 };
 
 
+enum result_code {
+	result_loser = 0,
+	result_winner = 1,
+	result_no_bidders = -2
+};
+
+
 GNUNET_NETWORK_STRUCT_BEGIN
 
 struct msg_head {