From 403a4936c8fc3756003a28328c18c770bc914b6d Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Fri, 23 Nov 2007 13:31:28 +0000
Subject: Debug UDP send logic

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@401 42af7a65-404d-4744-a932-0658087f49c3
---
 nuttx/net/uip/uip-send.c    |  8 ++++++--
 nuttx/net/uip/uip-udpsend.c | 17 +++++++++--------
 2 files changed, 15 insertions(+), 10 deletions(-)

(limited to 'nuttx/net/uip')

diff --git a/nuttx/net/uip/uip-send.c b/nuttx/net/uip/uip-send.c
index 93096168a..c9899db9e 100644
--- a/nuttx/net/uip/uip-send.c
+++ b/nuttx/net/uip/uip-send.c
@@ -93,9 +93,13 @@
 
 void uip_send(struct uip_driver_s *dev, const void *buf, int len)
 {
+  /* Some sanity checks -- note that the actually available length in the 
+   * buffer is considerably less than CONFIG_NET_BUFSIZE.
+   */
+
   if (dev && len > 0 && len < CONFIG_NET_BUFSIZE)
     {
+      memcpy(dev->d_snddata, buf, len);
       dev->d_sndlen = len;
-      memcpy(dev->d_snddata, buf, len );
-    }
+   }
 }
diff --git a/nuttx/net/uip/uip-udpsend.c b/nuttx/net/uip/uip-udpsend.c
index 8f77f78a2..8936c64bd 100644
--- a/nuttx/net/uip/uip-udpsend.c
+++ b/nuttx/net/uip/uip-udpsend.c
@@ -95,7 +95,7 @@
 
 void uip_udpsend(struct uip_driver_s *dev, struct uip_udp_conn *conn)
 {
-  if (dev->d_sndlen == 0)
+  if (dev->d_sndlen > 0)
     {
       /* The total lenth to send is the size of the application data plus
        * the IP and UDP headers (and, eventually, the ethernet header)
@@ -131,8 +131,8 @@ void uip_udpsend(struct uip_driver_s *dev, struct uip_udp_conn *conn)
       UDPBUF->ipid[1]     = g_ipid & 0xff;
       UDPBUF->ipoffset[0] = 0;
       UDPBUF->ipoffset[1] = 0;
-      UDPBUF->ttl          = conn->ttl;
-      UDPBUF->proto        = UIP_PROTO_UDP;
+      UDPBUF->ttl         = conn->ttl;
+      UDPBUF->proto       = UIP_PROTO_UDP;
 
       /* Calculate IP checksum. */
 
@@ -146,20 +146,21 @@ void uip_udpsend(struct uip_driver_s *dev, struct uip_udp_conn *conn)
 
       /* Initialize the UDP header */
 
-      UDPBUF->srcport      = conn->lport;
-      UDPBUF->destport     = conn->rport;
-      UDPBUF->udplen       = HTONS(dev->d_sndlen + UIP_UDPH_LEN);
+      UDPBUF->srcport     = conn->lport;
+      UDPBUF->destport    = conn->rport;
+      UDPBUF->udplen      = HTONS(dev->d_sndlen + UIP_UDPH_LEN);
 
 #ifdef CONFIG_NET_UDP_CHECKSUMS
       /* Calculate UDP checksum. */
 
-      UDPBUF->udpchksum = ~(uip_udpchksum(dev));
+      UDPBUF->udpchksum   = 0;
+      UDPBUF->udpchksum   = ~(uip_udpchksum(dev));
       if (UDPBUF->udpchksum == 0)
         {
           UDPBUF->udpchksum = 0xffff;
         }
 #else
-      UDPBUF->udpchksum    = 0;
+      UDPBUF->udpchksum   = 0;
 #endif
 
       vdbg("Outgoing UDP packet length: %d (%d)\n",
-- 
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