/*
* Send an aarp queue entry request
*
* Must run under aarp_lock.
*/
static void __aarp_send_query(struct aarp_entry *a)
{
static unsigned char aarp_eth_multicast[ETH_ALEN] =
{ 0x09, 0x00, 0x07, 0xFF, 0xFF, 0xFF };
struct net_device *dev = a->dev;
struct elapaarp *eah;
int len = dev->hard_header_len + sizeof(*eah) + aarp_dl->header_length;
struct sk_buff *skb = alloc_skb(len, GFP_ATOMIC);
struct atalk_addr *sat = atalk_find_dev_addr(dev);
if (!skb)
return;
if (!sat) {
kfree_skb(skb);
return;
}
/* Set up the buffer */
skb_reserve(skb, dev->hard_header_len + aarp_dl->header_length);
skb_reset_network_header(skb);
skb_reset_transport_header(skb);
skb_put(skb, sizeof(*eah));
skb->protocol = htons(ETH_P_ATALK);
skb->dev = dev;
eah = aarp_hdr(skb);
/* Set up the ARP */
eah->hw_type = htons(AARP_HW_TYPE_ETHERNET);
eah->pa_type = htons(ETH_P_ATALK);
eah->hw_len = ETH_ALEN;
eah->pa_len = AARP_PA_ALEN;
eah->function = htons(AARP_REQUEST);
memcpy(eah->hw_src, dev->dev_addr, ETH_ALEN);
eah->pa_src_zero = 0;
eah->pa_src_net = sat->s_net;
eah->pa_src_node = sat->s_node;
memset(eah->hw_dst, '\0', ETH_ALEN);
eah->pa_dst_zero = 0;
eah->pa_dst_net = a->target_addr.s_net;
eah->pa_dst_node = a->target_addr.s_node;
/* Send it */
aarp_dl->request(aarp_dl, skb, aarp_eth_multicast);
/* Update the sending count */
a->xmit_count++;
a->last_sent = jiffies;
}
/* This runs under aarp_lock and in softint context, so only atomic memory
* allocations can be used. */
static void aarp_send_reply(struct net_device *dev, struct atalk_addr *us,
struct atalk_addr *them, unsigned char *sha)
{
struct elapaarp *eah;
int len = dev->hard_header_len + sizeof(*eah) + aarp_dl->header_length;
struct sk_buff *skb = alloc_skb(len, GFP_ATOMIC);
if (!skb)
return;
/* Set up the buffer */
skb_reserve(skb, dev->hard_header_len + aarp_dl->header_length);
skb_reset_network_header(skb);
skb_reset_transport_header(skb);
skb_put(skb, sizeof(*eah));
skb->protocol = htons(ETH_P_ATALK);
skb->dev = dev;
eah = aarp_hdr(skb);
/* Set up the ARP */
eah->hw_type = htons(AARP_HW_TYPE_ETHERNET);
eah->pa_type = htons(ETH_P_ATALK);
eah->hw_len = ETH_ALEN;
eah->pa_len = AARP_PA_ALEN;
eah->function = htons(AARP_REPLY);
memcpy(eah->hw_src, dev->dev_addr, ETH_ALEN);
eah->pa_src_zero = 0;
eah->pa_src_net = us->s_net;
eah->pa_src_node = us->s_node;
if (!sha)
memset(eah->hw_dst, '\0', ETH_ALEN);
else
memcpy(eah->hw_dst, sha, ETH_ALEN);
eah->pa_dst_zero = 0;
eah->pa_dst_net = them->s_net;
eah->pa_dst_node = them->s_node;
/* Send it */
aarp_dl->request(aarp_dl, skb, sha);
}
static void aarp_send_probe(struct net_device *dev, struct atalk_addr *us)
{
struct elapaarp *eah;
int len = dev->hard_header_len + sizeof(*eah) + aarp_dl->header_length;
struct sk_buff *skb = alloc_skb(len, GFP_ATOMIC);
static unsigned char aarp_eth_multicast[ETH_ALEN] =
{ 0x09, 0x00, 0x07, 0xFF, 0xFF, 0xFF };
if (!skb)
return;
/* Set up the buffer */
skb_reserve(skb, dev->hard_header_len + aarp_dl->header_length);
skb_reset_network_header(skb);
skb_reset_transport_header(skb);
skb_put(skb, sizeof(*eah));
skb->protocol = htons(ETH_P_ATALK);
skb->dev = dev;
eah = aarp_hdr(skb);
/* Set up the ARP */
eah->hw_type = htons(AARP_HW_TYPE_ETHERNET);
eah->pa_type = htons(ETH_P_ATALK);
eah->hw_len = ETH_ALEN;
eah->pa_len = AARP_PA_ALEN;
eah->function = htons(AARP_PROBE);
ether_addr_copy(eah->hw_src, dev->dev_addr);
eah->pa_src_zero = 0;
eah->pa_src_net = us->s_net;
eah->pa_src_node = us->s_node;
eth_zero_addr(eah->hw_dst);
eah->pa_dst_zero = 0;
eah->pa_dst_net = us->s_net;
eah->pa_dst_node = us->s_node;
/* Send it */
aarp_dl->request(aarp_dl, skb, aarp_eth_multicast);
}
