Merge with /home/git/u-boot

[oweals/u-boot.git] / net / net.c

diff --git a/net/net.c b/net/net.c
index 2986924824b1a166b2f210ba6a4444ace9f30758..1d1c98f3c20204c74ef3173b50537e21af8c60cd 100644 (file)
--- a/net/net.c
+++ b/net/net.c
@@ -92,6 +92,8 @@
 
 #if (CONFIG_COMMANDS & CFG_CMD_NET)
 
+DECLARE_GLOBAL_DATA_PTR;
+
 #define ARP_TIMEOUT            5               /* Seconds before trying ARP again */
 #ifndef        CONFIG_NET_RETRY_COUNT
 # define ARP_TIMEOUT_COUNT     5               /* # of timeouts before giving up  */
@@ -222,8 +224,10 @@ void ArpRequest (void)
            (NetOurIP & NetOurSubnetMask)) {
                if (NetOurGatewayIP == 0) {
                        puts ("## Warning: gatewayip needed but not set\n");
+                       NetArpWaitReplyIP = NetArpWaitPacketIP;
+               } else {
+                       NetArpWaitReplyIP = NetOurGatewayIP;
                }
-               NetArpWaitReplyIP = NetOurGatewayIP;
        } else {
                NetArpWaitReplyIP = NetArpWaitPacketIP;
        }
@@ -264,8 +268,6 @@ void ArpTimeoutCheck(void)
 int
 NetLoop(proto_t protocol)
 {
-       DECLARE_GLOBAL_DATA_PTR;
-
        bd_t *bd = gd->bd;
 
 #ifdef CONFIG_NET_MULTI
@@ -570,9 +572,6 @@ startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
 
 void NetStartAgain (void)
 {
-#ifdef CONFIG_NET_MULTI
-       DECLARE_GLOBAL_DATA_PTR;
-#endif
        char *nretry;
        int noretry = 0, once = 0;
 
@@ -829,7 +828,10 @@ static ushort CDP_compute_csum(const uchar *buff, ushort len)
                }
                if (len) {
                        leftover = (signed short)(*(const signed char *)buff);
-                       /* * XXX CISCO SUCKS big time! (and blows too) */
+                       /* CISCO SUCKS big time! (and blows too):
+                        * CDP uses the IP checksum algorithm with a twist;
+                        * for the last byte it *sign* extends and sums.
+                        */
                        result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff);
                }
                while (result >> 16)