[patch] ctrl^c support

Question

"ctrl^c" support for ping & tftp

signed-off-by: Rouchel Yan <rouchel.yan@gmail.com>
-------------------------------------------------------------------------------------------------------
commit 83209f31ee6676e85ddfa317e13c7386458d21c4
Author: rouchel.yan <rouchel.yan@gmail.com>
Date:   Tue Aug 25 14:41:02 2009 -0400

    ctrl+c

diff --git a/app/net/ping.c b/app/net/ping.c
index ac7fab3..dd57af8 100644
--- a/app/net/ping.c
+++ b/app/net/ping.c
@@ -36,6 +36,8 @@ static int PingMain(int argc, char *argv[])

    sockAddr = getaddr(nip);

+   if(EINVAL == sockAddr)
+       return 0;
    if (NULL == sockAddr)
    {   
        sockAddr = gethostaddr(szDestIp);
diff --git a/device/net/cs8900.c b/device/net/cs8900.c
index 73fd803..7471264 100644
--- a/device/net/cs8900.c
+++ b/device/net/cs8900.c
@@ -184,7 +184,7 @@ static int __INIT__ CS8900Init(void)

    CS8900Reset();

-   pNetDev = GkNetDevNew();
+   pNetDev = GkNetDevNew(0);

    ret = GkRegisterIsr(IRQ_EINT9, CS8900Isr, NULL);

diff --git a/device/net/dm9000.c b/device/net/dm9000.c
index 73a6ec4..a8efd11 100644
--- a/device/net/dm9000.c
+++ b/device/net/dm9000.c
@@ -333,7 +333,7 @@ static int __INIT__ DM9000Init(void)
        }
    }

-   pNetDev = GkNetDevNew();
+   pNetDev = GkNetDevNew(0);
    BUG_IF (NULL == pNetDev);

    GkRegisterIsr(CONF_DM9000_IRQ, DM9000Isr, NULL);
diff --git a/device/net/net_core.c b/device/net/net_core.c
index d332511..7ce9b67 100644
--- a/device/net/net_core.c
+++ b/device/net/net_core.c
@@ -123,6 +123,14 @@ struct SocketBuffer *GUdpRecvPacket(struct Socket *pSock)
            break;
        }
        UnlockIrqPsr(psr);
+       if(GkUartGetStatus())
+       {
+           UINT32 uartdata;
+
+           uartdata = GkUartReadByte();
+           if(3 == uartdata)
+               return NULL;
+       }
        udelay(5);
    }

diff --git a/device/net/socket.c b/device/net/socket.c
index 1bcaeed..e495190 100644
--- a/device/net/socket.c
+++ b/device/net/socket.c
@@ -62,6 +62,8 @@ int close(int fd)
struct sockaddr *gethostaddr(const char *sip)
{
    UINT32 nip;
+   UINT32 count = 0;
+
    struct sockaddr *sockAddr;

    if(GuStrToIp((BYTE *)&nip, sip))
@@ -72,16 +74,24 @@ struct sockaddr *gethostaddr(const char *sip)

    ArpSendPacket((BYTE *)&nip, NULL, ARP_OP_REQ);

-   while (1)
+   while (count < 100000)
    {
        UINT32 psr;
+       BYTE uartdata;

        sockAddr = getaddr(nip);
+       if(GkUartGetStatus())
+       {
+           uartdata = GkUartReadByte();
+           if(3 == uartdata)
+               return EINVAL;
+       }
        if (sockAddr)
            break;

        // TODO: add re-send code here
        udelay(3);
+       count++;
    }

    return sockAddr;
@@ -145,6 +155,9 @@ long recv(int fd, void *buf, ULONG n)

    pSockBuff = GUdpRecvPacket(pSock);

+   if(NULL == pSockBuff)
+       return 0;
+
    // fixme !
    nPktLen   = pSockBuff->wSkbSize <= n ? pSockBuff->wSkbSize : n;

diff --git a/device/net/tftp.c b/device/net/tftp.c
index 1f30c67..2c01cd4 100644
--- a/device/net/tftp.c
+++ b/device/net/tftp.c
@@ -123,6 +123,8 @@ int GuNetTftpGetFile(struct TftpOpt *opt)
    {
        nPktLen = recv(sockfd, pTftpPkt, TFTP_BUF_LEN);

+       if(0 == nPktLen)
+           goto L1;
        nPktLen -= TFTP_HDR_LEN;

        if (nPktLen > TFTP_PKT_LEN)