void dn_nsp_output(struct sock *sk) { struct dn_scp *scp = DN_SK(sk); struct sk_buff *skb; unsigned reduce_win = 0; /* * First we check for otherdata/linkservice messages */ if ((skb = skb_peek(&scp->other_xmit_queue)) != NULL) reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC); /* * If we may not send any data, we don't. * If we are still trying to get some other data down the * channel, we don't try and send any data. */ if (reduce_win || (scp->flowrem_sw != DN_SEND)) goto recalc_window; if ((skb = skb_peek(&scp->data_xmit_queue)) != NULL) reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC); /* * If we've sent any frame more than once, we cut the * send window size in half. There is always a minimum * window size of one available. */ recalc_window: if (reduce_win) { scp->snd_window >>= 1; if (scp->snd_window < NSP_MIN_WINDOW) scp->snd_window = NSP_MIN_WINDOW; } }
void dn_nsp_output(struct sock *sk) { struct dn_scp *scp = DN_SK(sk); struct sk_buff *skb; unsigned reduce_win = 0; if ((skb = skb_peek(&scp->other_xmit_queue)) != NULL) reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC); if (reduce_win || (scp->flowrem_sw != DN_SEND)) goto recalc_window; if ((skb = skb_peek(&scp->data_xmit_queue)) != NULL) reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC); recalc_window: if (reduce_win) { scp->snd_window >>= 1; if (scp->snd_window < NSP_MIN_WINDOW) scp->snd_window = NSP_MIN_WINDOW; } }
void dn_nsp_queue_xmit(struct sock *sk, struct sk_buff *skb, gfp_t gfp, int oth) { struct dn_scp *scp = DN_SK(sk); struct dn_skb_cb *cb = DN_SKB_CB(skb); unsigned long t = ((scp->nsp_srtt >> 2) + scp->nsp_rttvar) >> 1; cb->xmit_count = 0; dn_nsp_mk_data_header(sk, skb, oth); /* * Slow start: If we have been idle for more than * one RTT, then reset window to min size. */ if ((jiffies - scp->stamp) > t) scp->snd_window = NSP_MIN_WINDOW; if (oth) skb_queue_tail(&scp->other_xmit_queue, skb); else skb_queue_tail(&scp->data_xmit_queue, skb); if (scp->flowrem_sw != DN_SEND) return; dn_nsp_clone_and_send(skb, gfp); }