int llc_conn_ac_send_sabme_cmd_p_set_x(struct sock *sk, struct sk_buff *skb)
{
int rc = -ENOBUFS;
struct llc_sock *llc = llc_sk(sk);
struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_U, 0);
if (nskb) {
struct llc_sap *sap = llc->sap;
u8 *dmac = llc->daddr.mac;
if (llc->dev->flags & IFF_LOOPBACK)
dmac = llc->dev->dev_addr;
llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap,
llc->daddr.lsap, LLC_PDU_CMD);
llc_pdu_init_as_sabme_cmd(nskb, 1);
rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, dmac);
if (unlikely(rc))
goto free;
llc_conn_send_pdu(sk, nskb);
llc_conn_set_p_flag(sk, 1);
}
out:
return rc;
free:
kfree_skb(nskb);
goto out;
}
int llc_conn_ac_stop_p_timer(struct sock *sk, struct sk_buff *skb)
{
struct llc_sock *llc = llc_sk(sk);
del_timer(&llc->pf_cycle_timer.timer);
llc_conn_set_p_flag(sk, 0);
return 0;
}
int llc_conn_ac_start_p_timer(struct sock *sk, struct sk_buff *skb)
{
struct llc_sock *llc = llc_sk(sk);
llc_conn_set_p_flag(sk, 1);
mod_timer(&llc->pf_cycle_timer.timer,
jiffies + llc->pf_cycle_timer.expire);
return 0;
}
int llc_conn_ac_upd_p_flag(struct sock *sk, struct sk_buff *skb)
{
struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
if (LLC_PDU_IS_RSP(pdu)) {
u8 f_bit;
llc_pdu_decode_pf_bit(skb, &f_bit);
if (f_bit) {
llc_conn_set_p_flag(sk, 0);
llc_conn_ac_stop_p_timer(sk, skb);
}
}
return 0;
}
/**
* llc_sk_reset - resets a connection
* @sk: LLC socket to reset
*
* Resets a connection to the out of service state. Stops its timers
* and frees any frames in the queues of the connection.
*/
void llc_sk_reset(struct sock *sk)
{
struct llc_sock *llc = llc_sk(sk);
llc_conn_ac_stop_all_timers(sk, NULL);
skb_queue_purge(&sk->sk_write_queue);
skb_queue_purge(&llc->pdu_unack_q);
llc->remote_busy_flag = 0;
llc->cause_flag = 0;
llc->retry_count = 0;
llc_conn_set_p_flag(sk, 0);
llc->f_flag = 0;
llc->s_flag = 0;
llc->ack_pf = 0;
llc->first_pdu_Ns = 0;
llc->ack_must_be_send = 0;
llc->dec_step = 1;
llc->inc_cntr = 2;
llc->dec_cntr = 2;
llc->X = 0;
llc->failed_data_req = 0 ;
llc->last_nr = 0;
}
static int llc_conn_ac_set_p_flag_1(struct sock *sk, struct sk_buff *skb)
{
llc_conn_set_p_flag(sk, 1);
return 0;
}
int llc_conn_ac_set_p_flag_0(struct sock *sk, struct sk_buff *skb)
{
llc_conn_set_p_flag(sk, 0);
return 0;
}
