From 7873ab1c30c52cdcd7a162af850c593ebee54e9f Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Fri, 18 Dec 2009 22:21:20 +0000
Subject: Fixing LM3S httpd example (still broken)

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2390 42af7a65-404d-4744-a932-0658087f49c3
---
 nuttx/arch/arm/src/lm3s/lm3s_ethernet.c | 33 ++++++++++++++++++---------------
 nuttx/examples/thttpd/main.c            | 10 ++++++++--
 nuttx/net/accept.c                      |  5 ++---
 3 files changed, 28 insertions(+), 20 deletions(-)

(limited to 'nuttx')

diff --git a/nuttx/arch/arm/src/lm3s/lm3s_ethernet.c b/nuttx/arch/arm/src/lm3s/lm3s_ethernet.c
index 41224418b..940fa6aec 100644
--- a/nuttx/arch/arm/src/lm3s/lm3s_ethernet.c
+++ b/nuttx/arch/arm/src/lm3s/lm3s_ethernet.c
@@ -658,12 +658,13 @@ static void lm3s_receive(struct lm3s_driver_s *priv)
       pktlen = (int)(regval & 0x0000ffff);
       nllvdbg("Receiving packet, pktlen: %d\n", pktlen);
 
-      /* Check if the pktlen is valid.  It should be large enough to
-       * hold an Ethernet header and small enough to fit entirely in
-       * the I/O buffer.
+      /* Check if the pktlen is valid.  It should be large enough to hold
+       * an Ethernet header and small enough to fit entirely in the I/O
+       * buffer.  Six is subtracted to acount for the 2-byte length/type
+       * and 4 byte FCS that are not copied into the uIP packet.
        */
 
-      if (pktlen > CONFIG_NET_BUFSIZE || pktlen <= UIP_LLH_LEN)
+      if (pktlen > (CONFIG_NET_BUFSIZE + 6) || pktlen <= (UIP_LLH_LEN + 6))
         {
           int wordlen;
 
@@ -697,10 +698,10 @@ static void lm3s_receive(struct lm3s_driver_s *priv)
 
       /* Read all of the whole, 32-bit values in the middle of the packet.
        * We've already read the length (2 bytes) plus the first two bytes
-       * of data
+       * of data.
        */
 
-      for (bytesleft = pktlen - 4; bytesleft > 3; bytesleft -= 4, dbuf += 4)
+      for (bytesleft = pktlen - 4; bytesleft > 7; bytesleft -= 4, dbuf += 4)
         {
           /* Transfer a whole word to the user buffer.  Note, the user
            * buffer may be un-aligned.
@@ -709,36 +710,38 @@ static void lm3s_receive(struct lm3s_driver_s *priv)
           *(uint32_t*)dbuf = lm3s_ethin(priv, LM3S_MAC_DATA_OFFSET);
         }
 
-      /* Handle the last, partial word in the FIFO */
+      /* Handle the last, partial word in the FIFO (0-3 bytes) and discard
+       * the 4-byte FCS.
+       */
 
-      if (bytesleft > 0)
+      for (; bytesleft > 0; bytesleft -= 4)
         {
-          /* Read the last word */
+          /* Read the last word.  And transfer all but the last four
+           * bytes of the FCS into the user buffer.
+           */
 
           regval = lm3s_ethin(priv, LM3S_MAC_DATA_OFFSET);
           switch (bytesleft)
             {
-              case 0:
               default:
                 break;
 
-              case 3:
+              case 7:
                 dbuf[2] = (regval >> 16) & 0xff;
-              case 2:
+              case 6:
                 dbuf[1] = (regval >> 8) & 0xff;
-              case 1:
+              case 5:
                 dbuf[0] = regval & 0xff;
                 break;
             }
         }
 
-      lm3s_dumppacket("Received packet", priv->ld_dev.d_buf, pktlen);
-
       /* Pass the packet length to uIP MINUS 2 bytes for the length and
        * 4 bytes for the FCS.
        */
 
       priv->ld_dev.d_len = pktlen - 6;
+      lm3s_dumppacket("Received packet", priv->ld_dev.d_buf, priv->ld_dev.d_len);
 
       /* We only accept IP packets of the configured type and ARP packets */
 
diff --git a/nuttx/examples/thttpd/main.c b/nuttx/examples/thttpd/main.c
index cb267b8d0..7c0c555c7 100644
--- a/nuttx/examples/thttpd/main.c
+++ b/nuttx/examples/thttpd/main.c
@@ -99,14 +99,18 @@
 #ifdef CONFIG_CPP_HAVE_VARARGS
 #  ifdef CONFIG_DEBUG
 #    define message(...) lib_lowprintf(__VA_ARGS__)
+#    define msgflush()
 #  else
 #    define message(...) printf(__VA_ARGS__)
+#    define msgflush()   fflush(stdout)
 #  endif
 #else
 #  ifdef CONFIG_DEBUG
-#    define message lib_lowprintf
+#    define message      lib_lowprintf
+#    define msgflush()
 #  else
-#    define message (void)
+#    define message      printf
+#    define msgflush()   fflush(stdout)
 #  endif
 #endif
 
@@ -230,7 +234,9 @@ int user_start(int argc, char *argv[])
   g_thttpdnsymbols = NEXPORTS;
 
   message("Starting THTTPD\n");
+  msgflush();
   thttpd_main(1, &thttpd_argv);
   message("THTTPD terminated\n");
+  msgflush();
   return 0;
 }
diff --git a/nuttx/net/accept.c b/nuttx/net/accept.c
index 28ea7e237..82d413d3f 100644
--- a/nuttx/net/accept.c
+++ b/nuttx/net/accept.c
@@ -158,10 +158,9 @@ static int accept_interrupt(struct uip_conn *listener, struct uip_conn *conn)
       pstate->acpt_newconn     = conn;
       pstate->acpt_result      = OK;
 
-      /* Set a reference of one on the new connection */
+      /* There should be a reference of one on the new connection */
 
-      DEBUGASSERT(conn->crefs == 0);
-      conn->crefs              = 1;
+      DEBUGASSERT(conn->crefs == 1);
 
       /* Wake-up the waiting caller thread */
 
-- 
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