int atm_mpoa_mpoad_attach (struct atm_vcc *vcc, int arg)
{
struct mpoa_client *mpc;
struct lec_priv *priv;
if (mpcs == NULL) {
init_timer(&mpc_timer);
mpc_timer_refresh();
/* This lets us now how our LECs are doing */
register_netdevice_notifier(&mpoa_notifier);
}
mpc = find_mpc_by_itfnum(arg);
if (mpc == NULL) {
dprintk("mpoa: mpoad_attach: allocating new mpc for itf %d\n", arg);
mpc = alloc_mpc();
if (mpc == NULL)
return -ENOMEM;
mpc->dev_num = arg;
mpc->dev = find_lec_by_itfnum(arg); /* NULL if there was no lec */
}
if (mpc->mpoad_vcc) {
printk("mpoa: mpoad_attach: mpoad is already present for itf %d\n", arg);
return -EADDRINUSE;
}
if (mpc->dev) { /* check if the lec is LANE2 capable */
priv = (struct lec_priv *)mpc->dev->priv;
if (priv->lane_version < 2) {
dev_put(mpc->dev);
mpc->dev = NULL;
} else
priv->lane2_ops->associate_indicator = lane2_assoc_ind;
}
mpc->mpoad_vcc = vcc;
vcc->dev = &mpc_dev;
vcc_insert_socket(vcc->sk);
set_bit(ATM_VF_META,&vcc->flags);
set_bit(ATM_VF_READY,&vcc->flags);
if (mpc->dev) {
char empty[ATM_ESA_LEN];
memset(empty, 0, ATM_ESA_LEN);
start_mpc(mpc, mpc->dev);
/* set address if mpcd e.g. gets killed and restarted.
* If we do not do it now we have to wait for the next LE_ARP
*/
if ( memcmp(mpc->mps_ctrl_addr, empty, ATM_ESA_LEN) != 0 )
send_set_mps_ctrl_addr(mpc->mps_ctrl_addr, mpc);
}
__module_get(THIS_MODULE);
return arg;
}
/*
* lec device calls this via its dev->priv->lane2_ops->associate_indicator()
* when it sees a TLV in LE_ARP packet.
* We fill in the pointer above when we see a LANE2 lec initializing
* See LANE2 spec 3.1.5
*
* Quite a big and ugly function but when you look at it
* all it does is to try to locate and parse MPOA Device
* Type TLV.
* We give our lec a pointer to this function and when the
* lec sees a TLV it uses the pointer to call this function.
*
*/
static void lane2_assoc_ind(struct net_device *dev, uint8_t *mac_addr,
uint8_t *tlvs, uint32_t sizeoftlvs)
{
uint32_t type;
uint8_t length, mpoa_device_type, number_of_mps_macs;
uint8_t *end_of_tlvs;
struct mpoa_client *mpc;
mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */
dprintk("mpoa: (%s) lane2_assoc_ind: received TLV(s), ", dev->name);
dprintk("total length of all TLVs %d\n", sizeoftlvs);
mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */
if (mpc == NULL) {
printk("mpoa: (%s) lane2_assoc_ind: no mpc\n", dev->name);
return;
}
end_of_tlvs = tlvs + sizeoftlvs;
while (end_of_tlvs - tlvs >= 5) {
type = (tlvs[0] << 24) | (tlvs[1] << 16) | (tlvs[2] << 8) | tlvs[3];
length = tlvs[4];
tlvs += 5;
dprintk(" type 0x%x length %02x\n", type, length);
if (tlvs + length > end_of_tlvs) {
printk("TLV value extends past its buffer, aborting parse\n");
return;
}
if (type == 0) {
printk("mpoa: (%s) lane2_assoc_ind: TLV type was 0, returning\n", dev->name);
return;
}
if (type != TLV_MPOA_DEVICE_TYPE) {
tlvs += length;
continue; /* skip other TLVs */
}
mpoa_device_type = *tlvs++;
number_of_mps_macs = *tlvs++;
dprintk("mpoa: (%s) MPOA device type '%s', ", dev->name, mpoa_device_type_string(mpoa_device_type));
if (mpoa_device_type == MPS_AND_MPC &&
length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */
printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n",
dev->name);
continue;
}
if ((mpoa_device_type == MPS || mpoa_device_type == MPC)
&& length < 22 + number_of_mps_macs*ETH_ALEN) {
printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n",
dev->name);
continue;
}
if (mpoa_device_type != MPS && mpoa_device_type != MPS_AND_MPC) {
dprintk("ignoring non-MPS device\n");
if (mpoa_device_type == MPC) tlvs += 20;
continue; /* we are only interested in MPSs */
}
if (number_of_mps_macs == 0 && mpoa_device_type == MPS_AND_MPC) {
printk("\nmpoa: (%s) lane2_assoc_ind: MPS_AND_MPC has zero MACs\n", dev->name);
continue; /* someone should read the spec */
}
dprintk("this MPS has %d MAC addresses\n", number_of_mps_macs);
/* ok, now we can go and tell our daemon the control address of MPS */
send_set_mps_ctrl_addr(tlvs, mpc);
tlvs = copy_macs(mpc, mac_addr, tlvs, number_of_mps_macs, mpoa_device_type);
if (tlvs == NULL) return;
}
if (end_of_tlvs - tlvs != 0)
printk("mpoa: (%s) lane2_assoc_ind: ignoring %Zd bytes of trailing TLV carbage\n",
dev->name, end_of_tlvs - tlvs);
return;
}