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Date: Wed, 19 Sep 2001 06:22:05 -0700 (PDT)
From: Guilhem Tardy <guilhem_tardy@yahoo.com>
Subject: 3c59x.c modified for time measurement / code included
To: netdev@oss.sgi.com, andrewm@uow.edu.au
Cc: greearb@candelatech.com
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Hi all,

I should be able to access skb->mac.{ethernet, raw} ahter eth_type_trans(skb,
dev), but nevertheless I used skb->data in the code below. At this point, only
a series of consecutive numbers are written for test purpose, but the result is
nil: I get all but what is expected when I tcpdump packets received on this
port. I thought that the error could reside in the filter on UDP & port, but it
seems right. Any idea?

Guilhem.
---
parts of the function boomerang_rx(struct net_device *dev) in 3c59x.c
---
(...)
		if (rx_status & RxDError) { /* Error, update stats. */
(...)
		} else {
			/* The packet length: up to 4.5K!. */
(...)
			skb->protocol = eth_type_trans(skb, dev);
			{					/* Use hardware checksum info. */
/* ### avoid checksum on all packets ! */
//				int csum_bits = rx_status & 0xee000000;
//				if (csum_bits &&
//					(csum_bits == (IPChksumValid | TCPChksumValid) ||
//					 csum_bits == (IPChksumValid | UDPChksumValid))) {
					skb->ip_summed = CHECKSUM_UNNECESSARY;
					vp->rx_csumhits++;
//				}
			}

/* ### add <driver rcv completed> time */
if (*(skb->data + 9) == 17 && *(((unsigned int *) (skb->data+20)) + 1) ==
htons(6969)) {
//	*((unsigned long *) (skb->data + 28)) = rsm_jiffies;
	*((unsigned long *) (skb->data + 28)) = 0x00000000;
	*(((unsigned long *) (skb->data + 28)) + 1) = 0x00000001;
	*(((unsigned long *) (skb->data + 28)) + 2) = 0x00000002;
	*(((unsigned long *) (skb->data + 28)) + 3) = 0x00000003;
	*(((unsigned long *) (skb->data + 28)) + 4) = 0x00000004;
	*(((unsigned long *) (skb->data + 28)) + 5) = 0x00000005;
}

			netif_rx(skb);
			dev->last_rx = jiffies;
			vp->stats.rx_packets++;
		}


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