/*
* State machine for state 1, Awaiting Connection State.
* The handling of the timer(s) is in file nr_timer.c.
* Handling of state 0 and connection release is in netrom.c.
*/
static int nr_state1_machine(struct sock *sk, struct sk_buff *skb, int frametype)
{
switch (frametype) {
case NR_CONNACK:
nr_stop_t1timer(sk);
nr_start_idletimer(sk);
sk->protinfo.nr->your_index = skb->data[17];
sk->protinfo.nr->your_id = skb->data[18];
sk->protinfo.nr->vs = 0;
sk->protinfo.nr->va = 0;
sk->protinfo.nr->vr = 0;
sk->protinfo.nr->vl = 0;
sk->protinfo.nr->state = NR_STATE_3;
sk->protinfo.nr->n2count = 0;
sk->protinfo.nr->window = skb->data[20];
sk->state = TCP_ESTABLISHED;
if (!sk->dead)
sk->state_change(sk);
break;
case NR_CONNACK | NR_CHOKE_FLAG:
nr_disconnect(sk, ECONNREFUSED);
break;
default:
break;
}
return 0;
}
static int nr_queue_rx_frame(struct sock *sk, struct sk_buff *skb, int more)
{
struct sk_buff *skbo, *skbn = skb;
skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
nr_start_idletimer(sk);
if (more) {
sk->protinfo.nr->fraglen += skb->len;
skb_queue_tail(&sk->protinfo.nr->frag_queue, skb);
return 0;
}
if (!more && sk->protinfo.nr->fraglen > 0) { /* End of fragment */
sk->protinfo.nr->fraglen += skb->len;
skb_queue_tail(&sk->protinfo.nr->frag_queue, skb);
if ((skbn = alloc_skb(sk->protinfo.nr->fraglen, GFP_ATOMIC)) == NULL)
return 1;
skbn->h.raw = skbn->data;
while ((skbo = skb_dequeue(&sk->protinfo.nr->frag_queue)) != NULL) {
memcpy(skb_put(skbn, skbo->len), skbo->data, skbo->len);
kfree_skb(skbo);
}
sk->protinfo.nr->fraglen = 0;
}
return sock_queue_rcv_skb(sk, skbn);
}
static void nr_send_iframe(struct sock *sk, struct sk_buff *skb)
{
struct nr_sock *nr = nr_sk(sk);
if (skb == NULL)
return;
skb->data[2] = nr->vs;
skb->data[3] = nr->vr;
if (nr->condition & NR_COND_OWN_RX_BUSY)
skb->data[4] |= NR_CHOKE_FLAG;
nr_start_idletimer(sk);
nr_transmit_buffer(sk, skb);
}
/*
* State machine for state 1, Awaiting Connection State.
* The handling of the timer(s) is in file nr_timer.c.
* Handling of state 0 and connection release is in netrom.c.
*/
static int nr_state1_machine(struct sock *sk, struct sk_buff *skb,
int frametype)
{
switch (frametype) {
case NR_CONNACK: {
struct nr_sock *nr = nr_sk(sk);
nr_stop_t1timer(sk);
nr_start_idletimer(sk);
nr->your_index = skb->data[17];
nr->your_id = skb->data[18];
nr->vs = 0;
nr->va = 0;
nr->vr = 0;
nr->vl = 0;
nr->state = NR_STATE_3;
nr->n2count = 0;
nr->window = skb->data[20];
sk->sk_state = TCP_ESTABLISHED;
if (!sock_flag(sk, SOCK_DEAD))
sk->sk_state_change(sk);
break;
}
case NR_CONNACK | NR_CHOKE_FLAG:
nr_disconnect(sk, ECONNREFUSED);
break;
case NR_RESET:
if (sysctl_netrom_reset_circuit)
nr_disconnect(sk, ECONNRESET);
break;
default:
break;
}
return 0;
}
static int nr_queue_rx_frame(struct sock *sk, struct sk_buff *skb, int more)
{
struct sk_buff *skbo, *skbn = skb;
struct nr_sock *nr = nr_sk(sk);
skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
nr_start_idletimer(sk);
if (more) {
nr->fraglen += skb->len;
skb_queue_tail(&nr->frag_queue, skb);
return 0;
}
if (!more && nr->fraglen > 0) { /* End of fragment */
nr->fraglen += skb->len;
skb_queue_tail(&nr->frag_queue, skb);
if ((skbn = alloc_skb(nr->fraglen, GFP_ATOMIC)) == NULL)
return 1;
skb_reset_transport_header(skbn);
while ((skbo = skb_dequeue(&nr->frag_queue)) != NULL) {
skb_copy_from_linear_data(skbo,
skb_put(skbn, skbo->len),
skbo->len);
kfree_skb(skbo);
}
nr->fraglen = 0;
}
return sock_queue_rcv_skb(sk, skbn);
}
