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Fixing LM3S httpd example (still broken)

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2390 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2009-12-18 22:21:20 +00:00
parent ea846fca33
commit 6d82da8efb
1 changed files with 18 additions and 15 deletions
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33
arch/arm/src/lm3s/lm3s_ethernet.c
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@ -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 */