/******************************************************************************
* Rx Section
******************************************************************************/
static inline void yam_rx_flag(struct net_device *dev, struct yam_port *yp)
{
if (yp->dcd && yp->rx_len >= 3 && yp->rx_len < YAM_MAX_FRAME) {
int pkt_len = yp->rx_len - 2 + 1; /* -CRC + kiss */
struct sk_buff *skb;
if ((yp->rx_crch & yp->rx_crcl) != 0xFF) {
/* Bad crc */
} else {
if (!(skb = dev_alloc_skb(pkt_len))) {
printk(KERN_WARNING "%s: memory squeeze, dropping packet\n", dev->name);
++dev->stats.rx_dropped;
} else {
unsigned char *cp;
cp = skb_put(skb, pkt_len);
*cp++ = 0; /* KISS kludge */
memcpy(cp, yp->rx_buf, pkt_len - 1);
skb->protocol = ax25_type_trans(skb, dev);
netif_rx(skb);
++dev->stats.rx_packets;
}
}
}
yp->rx_len = 0;
yp->rx_crcl = 0x21;
yp->rx_crch = 0xf3;
}
/*
* A small shim to dev_queue_xmit to add the KISS control byte, and do
* any packet forwarding in operation.
*/
void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev)
{
unsigned char *ptr;
skb->protocol = ax25_type_trans(skb, ax25_fwd_dev(dev));
ptr = skb_push(skb, 1);
*ptr = 0x00; /* KISS */
dev_queue_xmit(skb);
}
